This is why, to me, Mazda is the most exciting car manufacturer right now. They are really letting their engineers have fun and design fundamentally good engines.
Fundamentally good _and reliable_ engines. They aren't introducing additional moving parts (additional heat exchanger and newly-designed exhaust manifold) and use real-world consumer-grade fuel to achieve their results. That's awesome.
Mazda’s reason for including EGR really makes me like them so much more. EPA doesn’t change, but they want for the customer to get real results. So good.
Proportionately, it couldn't make a lick of difference. What percent of air intake is actually exhaust gas anyway? 0.002% What a silly and costly waste of time.
Mazda is truly a champion of the ppl. I feel like ppl that buy these types of cars may not care as much about fuel economy, but its nice that Mazda is delivering real world numbers instead of lab numbers.
Drive Mazda`s since 37 years. Have 3 now : RX 7 Rotary Turbo for sunny sundays ( - alternating with my 2 bikes ) , MX 5 ND 2.0 summer - daily and Cx 3 AWD 150 winter - daily.. Worth to mention: Live in no speed limit Germany ...
I never understood why car people existed until I bought myself an NA Mazda Miata. Never looked back since. I love that thing to death, and learned a ton from working on it. 10 out of 10 best first project car, it was so good I now have an NB in the driveway next to it. Having also driven an ND, I can confirm Mazda still makes cars the way they used to. How they got a 2300lb car through modern safety testing… I don’t wanna know but I love how they really let the engineers make good cars rather than having executives make compromising decisions. Maybe they aren’t as big as they could be because of that commitment, but I believe it will pay out for them in the long run as people start to figure out what’s up.
It's not that impressive as when you compare the avg real world mpg on fuelly 2017 Ford Escape 2.0T vs 2017 Mazda CX-9 2.5T which are based off the same duratec engine lineups from their old partnership days. Aside from 0.5 larger displacement you only get 10 more hp but ~500 lbs heavier. Which I'll concede would equate to about 7.5% mpg loss being heavier meaning if they were of equivalent weight it would be 24.725 mpg vs real world avg of 23 for both vehicles.Equating to a mere $94 annual fuel savings cost assuming 12K miles per year. To add context the 2.0T only comes on the top tier Ford Escape Platinum $36K MSRP so you'd get more bells and whistles vs the base sport Mazda CX-9 $35K. Which the top tier Mazda CX-9 would be $42K. I'll concede the CX-9 looks better but would I seriously want to spend $6K more for a Mazda? Yet, I could get a BMW X1 AWD with an 8 speed automatic that gets more MPG than Ford of Mazda for the price of the Mazda.
Cerberus984 i don't talk about This engine, but the whole thing, like skyactiv X, the maybe New rotary hybrid, the focus on Light Weight vehicule Before maximum power and the fact that Mazda is Almost the last car manufacturer Who believe that combustion engines are not dead. So keep it up Mazda ! (Same for you Jason btw)
The only thing lately that is impressive is the SkyActiv X. The rotary hybrid isn't a hybrid exactly as the wankle will merely be a generator extending max range for a plug in hybrid. Not necessarily amazing in my view. They are a relatively small manufacturer and simply don't have the pull to be able to mass purchase batteries as their competitors do. Which many new comers are either building at a loss or very little profit. So doing minor tweaks that they could patent and collect royalties to others is the most logical approach. I hope the HCCI is successful but I'm skeptical without some form of water injection to be durable in all weather extremes with the desert in particular.
Mazda have been saying recently that they have found a way to double the efficiency of the 13b Renesis (RX8) Rotary engine. Many have been wondering how, including me for a while. Part of the problem with the Rotary is how hot the combustion chamber gets in these power plants. Mazda have leaned on using very rich fuel mixtures to address this in the past. Watching this has made me think, maybe they plan implementing some style of cooled EGR system for a Rotary? @EngineeringExplained what is your take on that’s?
Very difficult to get complete compression ignition with the rotary as it has a very unusual and long combustion chamber, which also makes it harder to achieve an even air fuel mixture throughout the chamber. If anyone can do it, im sure it will be mazda :P
I would point out that a double efficiency rotory is still inefficient by modern standards, but certainly good enough to make it non-prohibitive for most buyers.
Looking at what they've been able to come up with for their piston engines lately, I'm very curious and excited to see where they're taking rotaries next as well. Rumors have been pointing to lower displacement (~1.6l) boosted designs making north of 400hp, so maybe they are looking to embrace the rotary's preference for high rpm operation now that material advancements are catching up to what they need for apex seals to be more reliable. With cooled egr they just might be able to get fuel economy and emissions closer to what they need to make it viable in the modern market, especially with the rest of their range stepping up to make the brand-wide average efficiency so impressive. And as stated above, the homogeneous spark combustion could be just the ticket to get proper combustion and reduce hot spots where they've had to use multiple spark plugs in the past due to the irregularly shaped combustion chambers of the rotary. Just imagine if these guys had the R&D budget of someone like Ford or Chevy, instead of being one of the smallest brands out there...
Damn, very interesting conclusion at the end, i think it's the right decision, props to Mazda for that. They may get less mainstream attention but for people who care like the people watching this channel it's surely good publicity to do that instead of going the cheating emissions route lmao
I would like to point out that while mazda does get as good Fc under near spirited driving, backing what their engineers says, to me, volvo is also another that gets close to EPA ratings in real world. Under some spirited drive as well. Just throwing it out there. since volvo also uses a rather complex egr system that may or may not be achieving the same effect. Props to Mazda though. ICE may be around for a lot longer yet
I'm not really sure it's cheating. My Civic Hatchback has all the "cheating" problems mentioned here, but I routinely beat EPA ratings on my commute by driving in a fuel-conscious way. Then on the weekend, I turn off Econ mode and have some fun (though fuel goes through the roof, from ~5 to ~9 l/100km). Works for me. Cool, though, that Mazda might let me have more fun without guzzling gas.
I have a CX9 with this engine and I have to say it's pretty impressive. I do actually get the fule economy that they advertise and I'm happy with the power. Under normal circumstances I get about 26-27 mpg (in a 7 passenger suv)
I get ~41 mpg in a non-turbo mazda 6 with gentle highway driving. The automatic version would probably get slightly better fuel economy, as it has a taller final drive ratio (3.8 vs 4.1 for the manual)
@Lima Charlie I am not sure if this is sarcasm or not, but 70% of this video is explaining how Mazda uses cooled EGR for way better real world efficiency. EGR is not just some gimmick to help with keeping the NOx and CO emissions down(which is important, even if you don't believe climate change is real), but it also, if made correctly, helps with high load thermal efficiency, something turbo engines struggle with. Like I sai, this could be sarcasm, if so, ditto.
My wife just bought a CX9 signature and all I can say is it doesn't feel like a 4cyl feels more like a 6cyl. So much torque, however you have to run higher octane 92 in order to achieve higher HP's. thanks for all those great videos
Tom there are Always exceptions... For example tepco, If You remember. AS i think that they didnt represent Japans ethics, so i think that VW doesnt represent the German ethics
Thank you for this video. I'm currently looking to upgrade my Mazda 3 GT to a 6GTR, but growing up I heard 4cyl turbos were bad news. Now I'm actually impressed and excited that I get to be a part of such an advanced and intelligent brand.🖖🏾👍🏾
I have both a 2019 Mazda CX-9 and a 2017 Mazda 3 with a manual transmission. They are phenomenally engineered vehicles, a blast to drive and very reliable. For cost to fun factor Mazda leads the way for driving enthusiasts.
I bought a Mazda six 2018 model recently. Love it. Great handling, great acceleration, the cooled seats are great. They had just offered Apple CarPlay as a paid for retrofit which I’m getting installed soon. Wouldn’t know what Else I could need in a four-door sedan.
I switched from a 5.3 liter GMT-900 truck to this engine in a CX-9. I truly believe it produces more torque than the other engine. Any truth to the rumor that the next gen of SkyActiv engines will not have spark plugs?
I’m so glad I opted for the 2018 Mazda 6 GT Reserve over the Camry and accord. Such an elegant exterior and interior design, and the performance matches it. With such high torque, everyday driving is very easy especially where I live where there’s hills everywhere. After seeing this video it just made me more satisfied with what I drive everyday. Thank you.
Jason, I'm glad I discovered this video! I just replaced the spark plugs on my wife's 2019 CX-5 2.5 Turbo... and was wondering what that little device was mounted to the top of the engine. Cooled EGR - Neat! Now I'm going to research if it needs servicing. Back in the day, her 1995 Honda Accord EX wagon had a known EGR issue where carbon deposits would build up in the internal ports and cause drivability issues. I used to tear it down every year and clean the waxy carbon gunk out, and it would run great for a while after that. This Mazda one though, I look forward to understanding it more.
Oh, and at 75,000 miles, the new spark plugs brought back that Mazda Zoom Zoom acceleration that had degraded only slightly this last year or so. Shame on me for being 15,000 miles overdue for new plugs!
My favorite RUclips channel. I wasn't smart enough to complete my engineering degree in college, but I love how engineers think. I ended up completing an MBA degree, and I was so impressed how the students with previous engineering backgrounds whizzed through the program so much easier than most of their counterparts who had the "advantage" of coming from academic and real world business backgrounds., IMHO, the world would be a better place if engineers were policy makers
I click on EE and see this crazy white board full of different colors and think I will never figure it out. By the time your done with your presentation, I completely understand it all. Im not quite sure how you do it, but please never stop! Thank you very much for all of your time and efforts sir!
Great explanation! I got the new Mazda6 and am amazed at the torque! I am still getting used to it but the fuel economy and performance is much better than my Mazdaspeed6! The Speed may have had better top end power but overall this engine is so much better! I am averaging 2.5mpg better with this one! Mazda got it right! Now to just get an AWD system....
Just for those that do not know, everyone uses EGR for emissions control. However, cooling the EGR gases by adding the complexity and weight of a cooler is silly, does not produce enough power increase to give you any benefit. The better example is to fully utilized the advantages of direct injection like Subaru WRX has (except leverage the advantage with a properly tuned map, factory map in those cars are crap IMO) to help get a more complete burn thus reducing the need to "trick" the engine into burning cleaner with a EGR setup. BTW EGR cooler or not is a bad idea for the longevity of an engine, especially in a direct inject engine which does not spray fuel into the intake path because of all the carbon buildup that results. Proper maped direct inject engine with EGR path removed altogether would be a huge improvement IMO. Sometimes less is more.
You are right, EGR is used by all manufacturers only for light throttle to reduce combustion temperature during weak air/fuel ratio. The EGR flow so tiny that no cooler is needed but the intake passing through turbo does. EGR is always off from moderate to full throttle
Of course I especially enjoyed this video because I have a Mazda SUV with a 4 CYL Turbo. The kick (torque) in that little engine is jaw dropping. My "little engine/turbo that can" does 0 to 60 in UNDER 7 seconds. That's insane for a midsize crossover SUV with a 4 cylinder engine.
Wow, super interesting! My Focus ST, before modifying it, would get mid 30s for average MPG on a long cruise but terrible around town/short trips. I definitely understood this when buying the car, because no matter what the sticker says, real word driving is typically way different as far as fuel economy. This is a very cool concept to be able to put your foot down a bit without MPG dropping to 8! However in my case, it is a performance car so that is my pay to play. In a DD with good passing power, this is a boon! Love your channel!
Recently purchased a 2018 cx9 Azami !!! 😳 Wasn't expecting what it delivers 🤯 Even loaded with 7 people it has more than enough power to put a smile on my face. I Once was a Honda Boi !!! Now a Mazda fan for sure.
The only thing plagued rotors are incompetent owners such as yourself and many others in the world of commuters, not drivers. No different than the new cylinder engines put out every year to increase compression and reduce intake temperature.
The smartness of Mazda guys on this turbo thing reminds me of the smartness of the guys who built the Anglo-French Concorde jet...and the Lockheed's SkunkWorks guys who built the SR-71 Blackbird jet.
I drive since new a 2009 Mazda 3 s hatchback 2.3 with 5 speed auto and 189,000 miles. I have been dumping money lately for suspension parts at all four corners and a trans module. A trans module is not a rebuild. At the end of the last 5000 mile oil change interval I got back from a 2000 mile Marathon trip in 50 hours. Car ran like a champ. Did not burn or leak a drop of synthetic oil.
Now imagine a new MazdaSpeed car that will give you 5 seconds 0-100 acceleration but still have an average fuel consumption of 7 liters per 100 kilometers. I would love to have that in a new MX3- style model that would give me something a bit more parctical than a Miata but still sportier than a 3.
Can you do a video on EGR and reliability concerns? A lot of people talk about how EGR is a reliability disaster on modern diesel engines, but then again it seems to have been used in gasoline engines for a long time.
Any issues with EGR gasses/pollutants condensing in the cooler manifold before it dumps into the intake manifold? I hate the fact EGR and crankcase recirculation is the main problem with direct injection. Anything recirculated will carry oil vapor and pollution, crudding up the intake manifold and intake valves. Ford was using a "cooled EGR" manifold on the 6.0L Powerstroke Diesel. Guess what? It was the main reason that engine was unreliable and had problems.
Lifted_Above agreed! as if the massive issues of carbon buildup weren't enough in these DI engines. I'd like to think that these EGR engines have some kind of filtering in place.
I agree! It was the same problem with volkswagen TDIs. I've cleaned the carbon on mine (ALH) and done an EGR delete exactly not to soot the intake again...
And gained a heap of performance in the process, most likely. Diesels are designed to BREATHE. The only limit to diesels making more and more power is how much air can be crammed into them and how much force the engine block can keep inside without cracking in half.
Mazda's whole Skyactiv lineup, as far as I know, only uses DI. This will lead to aggressive carbon buildup no matter what you do. It's a shame Mazda and Ford no longer co-develop their engines - Ford took Mazda's old L engines and the dual injected them to improve serviceability, while Mazda did this to improve economy. If only we could have both.
just went out and bought a 2024 Mazda CX 5 Sport Turbo, I chose the Mazda over the VW Atlas because of this video and the other video about the Mazda turbo engines. and I love my new CX5. it's a rocket ship.
There is one relatively small auto manufacturer that really cares for the customer to actually achieve fuel economy as advertised on their cars. They are called MAZDA. No others really care about their customers in this regard. I am thoroughly impressed.
Always wanted a WRX, but its fuel economy and CVT have been stopping me. Now rumor has it 2021 Mazda 3 will get this turbo with AWD, just waiting for it to turn up at dealers.
I have the 2017 civic with the 1.5 turbo engine. I always seem to get better fuel economy than what the epa said I should. I remember reading somewhere that it can be more efficient to give it some gas and accelerate quicker than it would be to drive it like a grandma. It’s either that or I’m coasting in gear more than what was represented in the epas testing.
the epa tests are a standardized test performed on a dyno by the manufacturer. the epa tests a limited number of cars per year. driving outside test conditions can impact economy +/-
I just picked up my Mazda 6 Turbo (got a new 2018 with major discounts, not enough people know how good this car is) I am just over the first 1000kms so I am just breaking the engine in, I'm already getting around 900 kms a tank (mostly highway) for this much power it is so efficient!
Unless you're talking about the firing order on the Ford 1.0 Ecoboost that gets around the exhaust scavenging issue by simply deleting a cylinder so exhaust pulses are more separated.
I have a Kia Ceed 2.0 CRDI diesel engine, it has EGR cooler, but in all info available ever states that EGR main function is to lower NOX production lowering combustion temperatures, not anyway improve eficiency or torque. I don not know how a 85/90 celsius degree coolant can decrease exhaust manifold gases temperature in EGR to the extent to manage more power. Certainly my EGR cooler is more tiny than Mazda one. Excellent video.
Toyota did that bit with the exhaust manifold back in 1990 with the SW20 MR2 Turbo and the ST185 Celica Turbo. The only difference was the exhaust pulses combined within the turbo exhaust housing which has the added benefit of reduced turbo lag.
Everyone knows that car companies grind money on service not on selling cars. Go on, and believe in that wonderful efficiency that will save ur money. I hate new cars, when elecrtonics died in new car, i couldn't even lock the door cuz they dont have key hole anymore, had to leave open car in the middle of a night at supermarkets parking lot...
I am diesel Mechanic and see these egr cooler fail a lot and they usually fail after warranty ends and they are ton of money, in thousands and they usually fail other components with them like tubro , egr valve and sometime injectors because of sticky coolant that leaks into air flow. So to keep till you have warranty only
Thanks. In fact, because of 4-3-2 exhaust, the exhaust pipe are longer so it takes more time to get hot and thus to meet the depolution standards with the catalyser, the car is throttling very much when starting the engine. I finally understood that!
I would totally buy it if it offers manual with everything on it... Accord has manual but it's like stripped down version.. I want mid size sedan with manual with everything on it, and it does NOT exist.
Wow! Because of this video and many others that explain how this engines work made me put and order in a Mazda with 2.5 with turbo. Mazda seems to take pride on their cars.
Mazda is as well, you’re going to start seeing some electrified Mazda vehicles in the next couple years, but they’re definitely taking their own strategy and approach to the subject.
Hey thanks for taking the time to explain these concepts in (what I think is) just the right amount of detail. This confirms a lot of my suspicions about small turbo engine design and also about Mazda's long-term willingness to innovate in powertrain designs... although I haven't had a Mazda since my RX-7. I really hope that you get more young people excited about Engineering (I'm looking at you, sons!)
Spam Can could have been if they didnt waste time with doritos. Also pretty sure scavenging and methanol injection has been around for more than 50 years... theres nothing new here.
No... he’s right about the Doritos. Having to change apex seals and fill it up with oil every week is nothing I’ll ever be jealous of. I’ve got two 1100 shaft horsepower engines that spin at 37,000 RPM that do anything a rotary can do but much better.
This makes me really like Mazda. In fact, my 08 Fusion has a Mazda engine in it and it's pretty great. Only problem I ever had with it has been a stuck open thermostat.
Ok I have watched a ton of videos, and all these car manufacturers is trying to make these turbocharged high hp 4 cylinders. Why want Ford and Chevy look back in there history at their best engines (Chevy 350/Ford 300-in-line 6) and bring them back with today’s technology? Could you imagine the Ford inline 6 with today’s technology turbocharged and all aluminum. The Chevy 350 all aluminum turbocharged with a 10speed automatic trans!!! Ok ok I’m dreaming but it would be very cool!
Dre C. Because older engines are not efficient. New engines use high compression ratios, variable valve time, fuel injection, turbocharging and etc to get more power and less weight. Smaller displacement engines are efficient at cruising speeds. Look at Ford's 2.7 Ecoboost rated 26mpg highway or 2.7 turbo 4 from Chevy which highly fuel efficient.
GM's LS based engines still have a lot in common with older 350's and whatnot. Obviously much more complex but it sounds like that's what you are asking for.
Dre C. The ls is basically a small block still, not much more efficient, all they really have is cylinder deactivation and adjustable timing since the timing curves aren't locked in with distributors anymore. They can make slightly more power, but when it comes down to it, power is made by displacement, camshaft(s), airflow, and compression.
This clarifies why the aftermarket for performance parts for the original Mini had many versions of the "Long Centre Banch" exhaust manifold. It also required a new inlet manifold because the inlet and exhaust gasses shared the same oe casting if I remember correctly. This obviously means that the inlet manifold was very hot.
You must be referring to the 2.3L Turbo MZR L3K9 engines in the previous gen CX-7, MS3 and MS6. They won Ward's best engines. A short few years later, bad turbos, smoking at idle issues, bad VVT actuators, timing chain slapping valve covers, stretched timing chains, impossible to time correctly without keyed pulleys and timing marks, etc. and so on...
The days of turbo motors always being peaky with no low end torque are long past, my friend. Modern turbos can have torque curves as flat as Kansas across several thousand RPMs.
ProNoober8 because EE is only 'hearting' the posts that cheerlead this video probably. And because EE fails to mention the downsides of this engine, such as EGR buildup failures, low horsepower (see any 2.0t Accord vs 2.5T 6 comparisons) and more.
Zuriel Briones Sharing similar concern here. I look back to mid-70s cars with EGR. Ten years down the line rust and gunk make for sticky valves and linkages. Potentially same thing could affect the variable exhaust port valving on this engine and now you have multiple points of sticking/failure. Will be interesting to see how durable ‘down the road’.
The EGR also aids in reducing NOx emissions: similar to how we associate high combustion temps with Engine Nock, NOx emissions tend to manifest more at higher combustion temps...just another thing to think about
The solution that Mazda uses is one that I believe is has always been used to maximize gas exchange in the cylinder. To imply that other manufacturers obviate this very important part of the intake-exhaust manifold, I believe it's not true, but I might be wrong with some manufacturers. Good explanation thought, liked it.
I've got 2012 Mazda 3(one of first with SkyActive 2L engine) currently at worry-free 158K miles. Still achieve promised good mileage, 41mpg on highways, and something like 30-31mpg in the city.
Diesel engines (some, Renault for example) already use this cooled egr process for some time. The reason could be the same, since diesel compression ratios are higher, knock was an issue. Good to see this being applied to gasoline engines. The egr coolers will have issues since the exhaust gases can damage the thin walls and you might get "head gasket leak" symptoms on the coolant circuit. I actually had this issue on a Renault 1.9 Dci. The egr coolers on Renault are simple to clean, but this Mazda one doesn't look that simple, we'll have to wait and see. Great video (also the previous one) love your channel.
Mazda is doing well on engine design. I owned a mazda3 skyactiv for 5 years now. The only thing i dont like abt this engine is that every 30k miles i need to take the intake manifold and clean the valve deposits. It seems that mazda engineer need to work harder on this. My solution, installed an oil catch can, and problem sloved
Another cool detail of inert gas in the chamber: when the gas heat up again, it expands it's volume. By this, you get way more gas volume going out of the cylinder and generating work, but using less fuel and the perfect stoichiometric oxigen to fuel ratio.
VW’s EA888 Gen3 VW engines are also stoich designed forced induction engines. They can run in almost all scenarios at 1.0 lambda until they enrich lambda under long duration/high load conditions to stay within the 1000*c turbine manufacturers limit. The integrated cylinder head/exhaust manifold helped extend the 1.0 lambda range much further before being limited to the turbine manufacturers limitations. Now some turbo manufacturers have bumped their limits to over 1030*c which should help car makers push this envelope once again.
I think engine size may also be a factor. Compare this to the Honda 1.5. The average driver in real-world conditions is going to be pushing that tiny 1.5 hard and the turbo is going to be spooling up and going into those conditions of lower fuel economy due to higher boost. Under the same conditions, the 2.5 isn't being pushed that hard and isn't going into those high boost conditions that lower fuel consumptions. The 1.5 is probably the right size engine for something in the subcompact class (like the Fit) as opposed to the bigger vehicles Honda is putting it in. The 2.5 is probably the right size engine for a larger sedan or midsize SUV. I suspect if some of these manufacturers picked right sized engines as opposed to going with these tiny little engines, then the differences between EPA and real world fuel economy on turbo engines would be less significant.
I think since late 90s early 2000s cooled EGR here in Europe is commonly used on Diesel cars. Needed quite some time to get to petrol engines. When VW introduced the integrated and water-cooled exhaust manifold they got completelay rid of the EGR as they claimed not to need it anymore, one part less to break. Whether cooled EGR will be a good thing on petrol engines in the long term will all depend on the quality of the EGR-valve and cooler which have to suffer from higher exhaust temps than in a diesel.
Oh. forgot to mention, like the quality engineering of the engine, Mazda's fit and finish of their cars is outstanding. My ex-GF bought a Mazda 6 in 2003. In 2018 that car still looks and runs like the day she bought it. In 2003 she paid about $26,000 for it, worth every penny.
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This is why, to me, Mazda is the most exciting car manufacturer right now. They are really letting their engineers have fun and design fundamentally good engines.
Especially for such a small company with a relatively low R&D budget, imagine if they had the same funding as the big three?
Fundamentally good _and reliable_ engines. They aren't introducing additional moving parts (additional heat exchanger and newly-designed exhaust manifold) and use real-world consumer-grade fuel to achieve their results. That's awesome.
There quite boring in my view as they still only produce fossil cars with little drive to go electric
> implying electricity production is clean
Am I allowed to laugh yet?
clever and not costumer friendly solutions (read costly)
Mazda is most underrated car manufacturer. Always been. Mazda's game is very strong now. Both engeenering and design
Best looking cars out of all the Japanese companies IMO.
Until recently, part of Ford.
bcubed72 by recently, you mean 10 years ago, right?
bcubed72 Mazda and ford have been buddies since the 70s.
they officially separated completely in 2014
Mazda’s reason for including EGR really makes me like them so much more. EPA doesn’t change, but they want for the customer to get real results. So good.
Proportionately, it couldn't make a lick of difference. What percent of air intake is actually exhaust gas anyway? 0.002% What a silly and costly waste of time.
Mazda is truly a champion of the ppl. I feel like ppl that buy these types of cars may not care as much about fuel economy, but its nice that Mazda is delivering real world numbers instead of lab numbers.
I wish they were a champion of the people when it came to reliability. (I own a lemon Mazda CX5)
Haylonix im sorry to hear about your cx5. I have a 2015 mazda6 with about 35k miles. No issues so far.
Haylonix What are the issues you've been having?
I care about driving fun but also efficiency, I used to only get Hondas but since SKYACTIV came out I have been getting Mazdas
I love Mazda, they're the little company that could. My next car will be a Mazda.
My last 3 where Mazda, pushed them too the limit and beyond, never had any problems. If you want to break them you have to crash em
Drive Mazda`s since 37 years. Have 3 now : RX 7 Rotary Turbo for sunny sundays ( - alternating with my 2 bikes ) , MX 5 ND 2.0 summer - daily and Cx 3 AWD 150 winter - daily.. Worth to mention: Live in no speed limit Germany ...
I never understood why car people existed until I bought myself an NA Mazda Miata. Never looked back since. I love that thing to death, and learned a ton from working on it. 10 out of 10 best first project car, it was so good I now have an NB in the driveway next to it. Having also driven an ND, I can confirm Mazda still makes cars the way they used to. How they got a 2300lb car through modern safety testing… I don’t wanna know but I love how they really let the engineers make good cars rather than having executives make compromising decisions. Maybe they aren’t as big as they could be because of that commitment, but I believe it will pay out for them in the long run as people start to figure out what’s up.
Mazda is a very underrated automaker. They really stand out from the rest in styling and engineering!
mazda is a truly amazing car maker.
Truly*
It's not that impressive as when you compare the avg real world mpg on fuelly 2017 Ford Escape 2.0T vs 2017 Mazda CX-9 2.5T which are based off the same duratec engine lineups from their old partnership days. Aside from 0.5 larger displacement you only get 10 more hp but ~500 lbs heavier. Which I'll concede would equate to about 7.5% mpg loss being heavier meaning if they were of equivalent weight it would be 24.725 mpg vs real world avg of 23 for both vehicles.Equating to a mere $94 annual fuel savings cost assuming 12K miles per year.
To add context the 2.0T only comes on the top tier Ford Escape Platinum $36K MSRP so you'd get more bells and whistles vs the base sport Mazda CX-9 $35K. Which the top tier Mazda CX-9 would be $42K. I'll concede the CX-9 looks better but would I seriously want to spend $6K more for a Mazda? Yet, I could get a BMW X1 AWD with an 8 speed automatic that gets more MPG than Ford of Mazda for the price of the Mazda.
Armesis P thanks for correction english is not my first language ah ha
Cerberus984 i don't talk about This engine, but the whole thing, like skyactiv X, the maybe New rotary hybrid, the focus on Light Weight vehicule Before maximum power and the fact that Mazda is Almost the last car manufacturer Who believe that combustion engines are not dead. So keep it up Mazda ! (Same for you Jason btw)
The only thing lately that is impressive is the SkyActiv X. The rotary hybrid isn't a hybrid exactly as the wankle will merely be a generator extending max range for a plug in hybrid. Not necessarily amazing in my view. They are a relatively small manufacturer and simply don't have the pull to be able to mass purchase batteries as their competitors do. Which many new comers are either building at a loss or very little profit. So doing minor tweaks that they could patent and collect royalties to others is the most logical approach. I hope the HCCI is successful but I'm skeptical without some form of water injection to be durable in all weather extremes with the desert in particular.
EE's Sunday morning uploads are just like Saturday cartoons as a kid.
Basically it means its very addictive to watch.
indeed this and launch control by subaru
Agreed :D
Agreed
Mazda have been saying recently that they have found a way to double the efficiency of the 13b Renesis (RX8) Rotary engine. Many have been wondering how, including me for a while. Part of the problem with the Rotary is how hot the combustion chamber gets in these power plants. Mazda have leaned on using very rich fuel mixtures to address this in the past. Watching this has made me think, maybe they plan implementing some style of cooled EGR system for a Rotary? @EngineeringExplained what is your take on that’s?
i think egr and Homogeneous charge compression ignition could bring the rotary engine back
Very difficult to get complete compression ignition with the rotary as it has a very unusual and long combustion chamber, which also makes it harder to achieve an even air fuel mixture throughout the chamber. If anyone can do it, im sure it will be mazda :P
I would point out that a double efficiency rotory is still inefficient by modern standards, but certainly good enough to make it non-prohibitive for most buyers.
Looking at what they've been able to come up with for their piston engines lately, I'm very curious and excited to see where they're taking rotaries next as well. Rumors have been pointing to lower displacement (~1.6l) boosted designs making north of 400hp, so maybe they are looking to embrace the rotary's preference for high rpm operation now that material advancements are catching up to what they need for apex seals to be more reliable.
With cooled egr they just might be able to get fuel economy and emissions closer to what they need to make it viable in the modern market, especially with the rest of their range stepping up to make the brand-wide average efficiency so impressive.
And as stated above, the homogeneous spark combustion could be just the ticket to get proper combustion and reduce hot spots where they've had to use multiple spark plugs in the past due to the irregularly shaped combustion chambers of the rotary.
Just imagine if these guys had the R&D budget of someone like Ford or Chevy, instead of being one of the smallest brands out there...
Woodmember - EE never answers good/interesting questions. He only responds to 'funny' one liners and puts hearts on them.
This is commitment
You just got married and still posting
Hats off
Planned upload my friend, Jason is probably way too smart to not have prep this before ;)
Wow, congratulations Jason!!!!
No ring, probably recorded beforehand.
Ahmed Moosaji hopefully he does not have a Whiteboard in his bedroom.....
Marc Schrewe, maybe Jason can finally start using Microsoft Paint!
Damn, very interesting conclusion at the end, i think it's the right decision, props to Mazda for that. They may get less mainstream attention but for people who care like the people watching this channel it's surely good publicity to do that instead of going the cheating emissions route lmao
coscorrodrift Pretty soon with the new testing methods there fuel ratings should increase.
I would like to point out that while mazda does get as good Fc under near spirited driving, backing what their engineers says, to me, volvo is also another that gets close to EPA ratings in real world. Under some spirited drive as well. Just throwing it out there. since volvo also uses a rather complex egr system that may or may not be achieving the same effect. Props to Mazda though. ICE may be around for a lot longer yet
I'm not really sure it's cheating. My Civic Hatchback has all the "cheating" problems mentioned here, but I routinely beat EPA ratings on my commute by driving in a fuel-conscious way. Then on the weekend, I turn off Econ mode and have some fun (though fuel goes through the roof, from ~5 to ~9 l/100km). Works for me. Cool, though, that Mazda might let me have more fun without guzzling gas.
I have a CX9 with this engine and I have to say it's pretty impressive. I do actually get the fule economy that they advertise and I'm happy with the power. Under normal circumstances I get about 26-27 mpg (in a 7 passenger suv)
Brad Haines yeah that's driving pretty gentle... "Normal" driving I average 23-24 which is still pretty reasonable
that's good man, considering that that engine probably has in the mid 300 horsepower. probably in the mazda 6 you'd even get into 40 mpg.
I get ~41 mpg in a non-turbo mazda 6 with gentle highway driving. The automatic version would probably get slightly better fuel economy, as it has a taller final drive ratio (3.8 vs 4.1 for the manual)
dump the egr...
@Lima Charlie I am not sure if this is sarcasm or not, but 70% of this video is explaining how Mazda uses cooled EGR for way better real world efficiency. EGR is not just some gimmick to help with keeping the NOx and CO emissions down(which is important, even if you don't believe climate change is real), but it also, if made correctly, helps with high load thermal efficiency, something turbo engines struggle with. Like I sai, this could be sarcasm, if so, ditto.
My wife just bought a CX9 signature and all I can say is it doesn't feel like a 4cyl feels more like a 6cyl. So much torque, however you have to run higher octane 92 in order to achieve higher HP's. thanks for all those great videos
Faszinating technique. I really Like mazdas Philosophy to Focus on the needs of the customer
Welcome to the world of Japanese company ethics. Completely different world than the Germans live and act in.
Tom there are Always exceptions... For example tepco, If You remember. AS i think that they didnt represent Japans ethics, so i think that VW doesnt represent the German ethics
Thank you for this video. I'm currently looking to upgrade my Mazda 3 GT to a 6GTR, but growing up I heard 4cyl turbos were bad news. Now I'm actually impressed and excited that I get to be a part of such an advanced and intelligent brand.🖖🏾👍🏾
I have both a 2019 Mazda CX-9 and a 2017 Mazda 3 with a manual transmission. They are phenomenally engineered vehicles, a blast to drive and very reliable. For cost to fun factor Mazda leads the way for driving enthusiasts.
I bought a Mazda six 2018 model recently. Love it. Great handling, great acceleration, the cooled seats are great. They had just offered Apple CarPlay as a paid for retrofit which I’m getting installed soon. Wouldn’t know what Else I could need in a four-door sedan.
I switched from a 5.3 liter GMT-900 truck to this engine in a CX-9. I truly believe it produces more torque than the other engine. Any truth to the rumor that the next gen of SkyActiv engines will not have spark plugs?
I’m so glad I opted for the 2018 Mazda 6 GT Reserve over the Camry and accord.
Such an elegant exterior and interior design, and the performance matches it. With such high torque, everyday driving is very easy especially where I live where there’s hills everywhere.
After seeing this video it just made me more satisfied with what I drive everyday. Thank you.
Hi, how is that car holding up? I'm planning to buy this same car
I have Mazda 6 2016 2.5L
With 186,000 km
One of the best cars that I have driven
I am planning to buy Cx9
This is why I'm such a big Mazda fanboy!
Jason, I'm glad I discovered this video! I just replaced the spark plugs on my wife's 2019 CX-5 2.5 Turbo... and was wondering what that little device was mounted to the top of the engine. Cooled EGR - Neat! Now I'm going to research if it needs servicing. Back in the day, her 1995 Honda Accord EX wagon had a known EGR issue where carbon deposits would build up in the internal ports and cause drivability issues. I used to tear it down every year and clean the waxy carbon gunk out, and it would run great for a while after that. This Mazda one though, I look forward to understanding it more.
Oh, and at 75,000 miles, the new spark plugs brought back that Mazda Zoom Zoom acceleration that had degraded only slightly this last year or so. Shame on me for being 15,000 miles overdue for new plugs!
My favorite RUclips channel. I wasn't smart enough to complete my engineering degree in college, but I love how engineers think. I ended up completing an MBA degree, and I was so impressed how the students with previous engineering backgrounds whizzed through the program so much easier than most of their counterparts who had the "advantage" of coming from academic and real world business backgrounds., IMHO, the world would be a better place if engineers were policy makers
I click on EE and see this crazy white board full of different colors and think I will never figure it out. By the time your done with your presentation, I completely understand it all. Im not quite sure how you do it, but please never stop! Thank you very much for all of your time and efforts sir!
How do you start your Sunday? "Hello everyone, and welcome!"
Thanks for another great video this week.
matt b thanks for watching this Sunday morning!
Drive my 2016 Mazda 3 or now 2021 Mazda CX5 Carbon Edition Turbo.
Great explanation! I got the new Mazda6 and am amazed at the torque! I am still getting used to it but the fuel economy and performance is much better than my Mazdaspeed6! The Speed may have had better top end power but overall this engine is so much better! I am averaging 2.5mpg better with this one! Mazda got it right! Now to just get an AWD system....
Just for those that do not know, everyone uses EGR for emissions control. However, cooling the EGR gases by adding the complexity and weight of a cooler is silly, does not produce enough power increase to give you any benefit. The better example is to fully utilized the advantages of direct injection like Subaru WRX has (except leverage the advantage with a properly tuned map, factory map in those cars are crap IMO) to help get a more complete burn thus reducing the need to "trick" the engine into burning cleaner with a EGR setup. BTW EGR cooler or not is a bad idea for the longevity of an engine, especially in a direct inject engine which does not spray fuel into the intake path because of all the carbon buildup that results. Proper maped direct inject engine with EGR path removed altogether would be a huge improvement IMO. Sometimes less is more.
You are right, EGR is used by all manufacturers only for light throttle to reduce combustion temperature during weak air/fuel ratio. The EGR flow so tiny that no cooler is needed but the intake passing through turbo does. EGR is always off from moderate to full throttle
Of course I especially enjoyed this video because I have a Mazda SUV with a 4 CYL Turbo. The kick (torque) in that little engine is jaw dropping. My "little engine/turbo that can" does 0 to 60 in UNDER 7 seconds. That's insane for a midsize crossover SUV with a 4 cylinder engine.
Wow, super interesting! My Focus ST, before modifying it, would get mid 30s for average MPG on a long cruise but terrible around town/short trips. I definitely understood this when buying the car, because no matter what the sticker says, real word driving is typically way different as far as fuel economy. This is a very cool concept to be able to put your foot down a bit without MPG dropping to 8! However in my case, it is a performance car so that is my pay to play. In a DD with good passing power, this is a boon! Love your channel!
Recently purchased a 2018 cx9 Azami !!! 😳 Wasn't expecting what it delivers 🤯 Even loaded with 7 people it has more than enough power to put a smile on my face. I Once was a Honda Boi !!! Now a Mazda fan for sure.
AHA! With the cooled EGR MAZDA gets more torque!
Lovin' my 2019 CX 5 GT Reserve 2.5 L. turbo.
There actually not too bad. Wife has a cx9 azami we love it. Power is not too bad either on sport mode.
where's the 4 rotor?
lasagna bloke. On the shelf until Mazda can justify selling it.
I like this guy, we've don't even have a two rotor, but he's dreaming high
lasagna bloke wrong channel broo😂it's suppose to be rob dham's channel 😂
Plagued with all the same problems of every other rotary engine
The only thing plagued rotors are incompetent owners such as yourself and many others in the world of commuters, not drivers. No different than the new cylinder engines put out every year to increase compression and reduce intake temperature.
The smartness of Mazda guys on this turbo thing reminds me of the smartness of the guys who built the Anglo-French Concorde jet...and the Lockheed's SkunkWorks guys who built the SR-71 Blackbird jet.
I can't understand but what you said seems awesome.
I absolutely love Mazda, hands down favorite car manufacturer
I drive since new a 2009 Mazda 3 s hatchback 2.3 with 5 speed auto and 189,000 miles. I have been dumping money lately for suspension parts at all four corners and a trans module. A trans module is not a rebuild. At the end of the last 5000 mile oil change interval I got back from a 2000 mile Marathon trip in 50 hours. Car ran like a champ. Did not burn or leak a drop of synthetic oil.
Now imagine a new MazdaSpeed car that will give you 5 seconds 0-100 acceleration but still have an average fuel consumption of 7 liters per 100 kilometers.
I would love to have that in a new MX3- style model that would give me something a bit more parctical than a Miata but still sportier than a 3.
Adam K What you’re talking about already exists. It’s called a 3.0 tdi
I want a new car. New diesel car in Europe is not a good idea.
Can you do a video on EGR and reliability concerns? A lot of people talk about how EGR is a reliability disaster on modern diesel engines, but then again it seems to have been used in gasoline engines for a long time.
Drop this in the Mazda 3
They did !!!!... I just sold my 3 because kid#5 won't fit... but enjoying my new cx9. Loving it just like I loved my 2.0 manual 3.
You're really selling me on Mazda. The cars look cooler and now the engines keep getting cooler too. Great video
I wasn't expecting cooled EGR. I knew it was gonna be in the Skyactiv-X, but I didn't know it's in the current lineup.
Steve Edward Its currently only in their turbos and diesels. And the soon to be x.
Just bought the 2022 CX-30 Turbo... Most fun I've ever had driving a car. Not to mention how insanely nice the interior/exterior is.
Any issues with EGR gasses/pollutants condensing in the cooler manifold before it dumps into the intake manifold? I hate the fact EGR and crankcase recirculation is the main problem with direct injection. Anything recirculated will carry oil vapor and pollution, crudding up the intake manifold and intake valves.
Ford was using a "cooled EGR" manifold on the 6.0L Powerstroke Diesel. Guess what? It was the main reason that engine was unreliable and had problems.
Lifted_Above agreed! as if the massive issues of carbon buildup weren't enough in these DI engines. I'd like to think that these EGR engines have some kind of filtering in place.
All gas-DI engines should be dual injection (port and direct).
I agree! It was the same problem with volkswagen TDIs. I've cleaned the carbon on mine (ALH) and done an EGR delete exactly not to soot the intake again...
And gained a heap of performance in the process, most likely. Diesels are designed to BREATHE. The only limit to diesels making more and more power is how much air can be crammed into them and how much force the engine block can keep inside without cracking in half.
Mazda's whole Skyactiv lineup, as far as I know, only uses DI. This will lead to aggressive carbon buildup no matter what you do. It's a shame Mazda and Ford no longer co-develop their engines - Ford took Mazda's old L engines and the dual injected them to improve serviceability, while Mazda did this to improve economy. If only we could have both.
I love this guy! His reviews are so comprehensive and he clearly knows what he’s talking about.
Sadly they removed the manual transmission on the mazda 6 .. Guess we'll have to wait for mazdaspeed to comback
i've always loved mazda's willingness to experiment and take risks with their engineering. a lot of cool tech comes out of that
Imagine that engine in an MX-5!
just went out and bought a 2024 Mazda CX 5 Sport Turbo, I chose the Mazda over the VW Atlas because of this video and the other video about the Mazda turbo engines. and I love my new CX5. it's a rocket ship.
Impressive. They are putting customer satisfaction first. Interesting, must be a new concept :-).
Very informative series. Thanks for sharing these.
Neil Porter thanks Neil!
There is one relatively small auto manufacturer that really cares for the customer to actually achieve fuel economy as advertised on their cars. They are called MAZDA. No others really care about their customers in this regard. I am thoroughly impressed.
Mazda/Hyundai/Kia are the most interesting car manufacture right now, aka, all the underrated ones.
Always wanted a WRX, but its fuel economy and CVT have been stopping me. Now rumor has it 2021 Mazda 3 will get this turbo with AWD, just waiting for it to turn up at dealers.
I have the 2017 civic with the 1.5 turbo engine. I always seem to get better fuel economy than what the epa said I should. I remember reading somewhere that it can be more efficient to give it some gas and accelerate quicker than it would be to drive it like a grandma. It’s either that or I’m coasting in gear more than what was represented in the epas testing.
Jacob Klein yeah me to I got the turbo 1.5
no, you just weight less than donut-fed epa officials
the epa tests are a standardized test performed on a dyno by the manufacturer. the epa tests a limited number of cars per year. driving outside test conditions can impact economy +/-
keep an eye on your oil. Tons of fuel dilution issues - one of the main reasons i went Mazda over Honda
Youre supposed to get to speed quicly, and then turn on cruise control to maintain speed, as well as coast as much as possible
I always feel like a genius after watching EE’a videos - he does such a good job at helping people understand
Hey mate👋, just wanted to let you know that I love your content, keep up the awesome videos 👌🏻👌🏻👌🏻
Rory Bramich-Fay thanks!!
I just picked up my Mazda 6 Turbo (got a new 2018 with major discounts, not enough people know how good this car is) I am just over the first 1000kms so I am just breaking the engine in, I'm already getting around 900 kms a tank (mostly highway) for this much power it is so efficient!
Mazda: Having the most efficient of everything.
Tyrone Square Mazda is the FIRST place I would EVER take my 2018 Mazda 6 for service. Eric is absolutely meticulous and highly efficient.
Loved learning about this new tech from Mazda. Thanks EE! Keep up the good work.
Drove a cx9 turbo awd for 3 mos. Awesome suv with power, handling and efficiency.
As far as the exhaust gas scavenging, this has more to do with header design more than firing order, in my opinion.
That's basically what he was saying, the design was optimized based on the firing order to improve scavenging.
Unless you're talking about the firing order on the Ford 1.0 Ecoboost that gets around the exhaust scavenging issue by simply deleting a cylinder so exhaust pulses are more separated.
I have a Kia Ceed 2.0 CRDI diesel engine, it has EGR cooler, but in all info available ever states that EGR main function is to lower NOX production lowering combustion temperatures, not anyway improve eficiency or torque. I don not know how a 85/90 celsius degree coolant can decrease exhaust manifold gases temperature in EGR to the extent to manage more power. Certainly my EGR cooler is more tiny than Mazda one. Excellent video.
Good guy Mazda, not just for the sticker!
Toyota did that bit with the exhaust manifold back in 1990 with the SW20 MR2 Turbo and the ST185 Celica Turbo. The only difference was the exhaust pulses combined within the turbo exhaust housing which has the added benefit of reduced turbo lag.
Will this fit on my Mazda 2?
Antonio. Doubtful since the n/a 2.0L barely fit in the Miata engine bay.
Everyone knows that car companies grind money on service not on selling cars. Go on, and believe in that wonderful efficiency that will save ur money. I hate new cars, when elecrtonics died in new car, i couldn't even lock the door cuz they dont have key hole anymore, had to leave open car in the middle of a night at supermarkets parking lot...
Mazda is frankly, the best car company in the world.
I am diesel Mechanic and see these egr cooler fail a lot and they usually fail after warranty ends and they are ton of money, in thousands and they usually fail other components with them like tubro , egr valve and sometime injectors because of sticky coolant that leaks into air flow. So to keep till you have warranty only
Can everyone just stop buying those ugly and boring cars from other Japanese manufacturers and German ones like VW? Support Mazda with your wallet!
^VW employee?
Thanks.
In fact, because of 4-3-2 exhaust, the exhaust pipe are longer so it takes more time to get hot and thus to meet the depolution standards with the catalyser, the car is throttling very much when starting the engine. I finally understood that!
I would totally buy it if it offers manual with everything on it... Accord has manual but it's like stripped down version.. I want mid size sedan with manual with everything on it, and it does NOT exist.
Kihoon Cho , a Mazda 6 turbo was something I considered, but when I found out it wasn’t available in manual, i was disappointed and I went elsewhere.
BMW still offer the 330i and 340i with a 6 speed
KIA Stinger
Does not exist *in the US*. You need to move to Europe to get a sedan (or anything else) with a manual.
As they have created this tehnology because they listen to their customers, they might listen to manuals request too, keep hoping
Wow! Because of this video and many others that explain how this engines work made me put and order in a Mazda with 2.5 with turbo. Mazda seems to take pride on their cars.
world is moving to electric hybrids, mazda still sticking to basic thermodynamics, you need balls to do that
what about tesla??????
Piston Head Teslas are selling like hotcakes, but they're pure electric vehicles, not hybrids.
Mazda is as well, you’re going to start seeing some electrified Mazda vehicles in the next couple years, but they’re definitely taking their own strategy and approach to the subject.
i mean use of electricity, whether its hybrid or pure electric.
Hey thanks for taking the time to explain these concepts in (what I think is) just the right amount of detail. This confirms a lot of my suspicions about small turbo engine design and also about Mazda's long-term willingness to innovate in powertrain designs... although I haven't had a Mazda since my RX-7. I really hope that you get more young people excited about Engineering (I'm looking at you, sons!)
If only mazda did this 15 years ago instead of waste so much time with Doritos
Beach&BoardFan This technology wasn't available a decade and a half ago.
Spam Can could have been if they didnt waste time with doritos.
Also pretty sure scavenging and methanol injection has been around for more than 50 years... theres nothing new here.
Beach&BoardFan. Never any wasted time with Rotarys.
So this guy is the token butthurt rotary non-owner? Weak.
No... he’s right about the Doritos. Having to change apex seals and fill it up with oil every week is nothing I’ll ever be jealous of. I’ve got two 1100 shaft horsepower engines that spin at 37,000 RPM that do anything a rotary can do but much better.
This makes me really like Mazda. In fact, my 08 Fusion has a Mazda engine in it and it's pretty great. Only problem I ever had with it has been a stuck open thermostat.
Ok I have watched a ton of videos, and all these car manufacturers is trying to make these turbocharged high hp 4 cylinders. Why want Ford and Chevy look back in there history at their best engines (Chevy 350/Ford 300-in-line 6) and bring them back with today’s technology? Could you imagine the Ford inline 6 with today’s technology turbocharged and all aluminum. The Chevy 350 all aluminum turbocharged with a 10speed automatic trans!!! Ok ok I’m dreaming but it would be very cool!
The ford inline 6 is called a Barra. Look it up
Dre C. Because older engines are not efficient. New engines use high compression ratios, variable valve time, fuel injection, turbocharging and etc to get more power and less weight. Smaller displacement engines are efficient at cruising speeds. Look at Ford's 2.7 Ecoboost rated 26mpg highway or 2.7 turbo 4 from Chevy which highly fuel efficient.
GM's LS based engines still have a lot in common with older 350's and whatnot. Obviously much more complex but it sounds like that's what you are asking for.
Bot Account I’m glad you said that. I’m looking at importing one to put into my Mazda b2500.
Dre C. The ls is basically a small block still, not much more efficient, all they really have is cylinder deactivation and adjustable timing since the timing curves aren't locked in with distributors anymore. They can make slightly more power, but when it comes down to it, power is made by displacement, camshaft(s), airflow, and compression.
This clarifies why the aftermarket for performance parts for the original Mini had many versions of the "Long Centre Banch" exhaust manifold. It also required a new inlet manifold because the inlet and exhaust gasses shared the same oe casting if I remember correctly. This obviously means that the inlet manifold was very hot.
Voted year's best engine. Ten years later, see bitter, negative comments on the internet about how crappy and unreliable the engine is.
Captain Shark like the one you posted?
Captain Shark facts? Evidence? Or just your worthless opinion and magical glass bowl??
You must be referring to the 2.3L Turbo MZR L3K9 engines in the previous gen CX-7, MS3 and MS6. They won Ward's best engines. A short few years later, bad turbos, smoking at idle issues, bad VVT actuators, timing chain slapping valve covers, stretched timing chains, impossible to time correctly without keyed pulleys and timing marks, etc. and so on...
Thanks! One common example I have to add are the Northstar engines, but this is a foreign car video.
Tbf i had no idea mazda did this. This makes the cars/engines so much cooler to me
They're squeezing every ounce of efficiency out of these tiny engines! Where does it end? Nothing like American muscle though 💪
2,5l is not tiny…
Most turbo engines are under 1,5l.
it ends in electric
Mgoblagulkablong id consider that tiny lol my motorcycle is a 2 liter
Reinaldo Gonzalez haha well said. Very true. These electric motors already are beating gasoline numbers.
im wondering what happen if they put these technologies into big displacement engine
Simple tech, solid results. Honest and reliable.
so they give up on natural asperation?
zacao. Why would you say that? Most of their cars are NA.
New generation NA engines are coming out, but they need engines that can produce more power than that, so they made a turbo one.
The days of turbo motors always being peaky with no low end torque are long past, my friend. Modern turbos can have torque curves as flat as Kansas across several thousand RPMs.
I think there one of the only or few manufacturers who still have a mostly all NA cars and suvs.
Markle2k flat as Kansas. Now that's funny. I did drive across Kansas once not only flat but boring.
I have slowly falled in love with mazda the 6 has been a great platform as has the 3 and of course the mighty little miata for awhile.
why do I get the feeling that Mazda had some involvement with this video?
ProNoober8 because EE is only 'hearting' the posts that cheerlead this video probably. And because EE fails to mention the downsides of this engine, such as EGR buildup failures, low horsepower (see any 2.0t Accord vs 2.5T 6 comparisons) and more.
Zuriel Briones Sharing similar concern here. I look back to mid-70s cars with EGR. Ten years down the line rust and gunk make for sticky valves and linkages. Potentially same thing could affect the variable exhaust port valving on this engine and now you have multiple points of sticking/failure. Will be interesting to see how durable ‘down the road’.
The EGR also aids in reducing NOx emissions: similar to how we associate high combustion temps with Engine Nock, NOx emissions tend to manifest more at higher combustion temps...just another thing to think about
The solution that Mazda uses is one that I believe is has always been used to maximize gas exchange in the cylinder. To imply that other manufacturers obviate this very important part of the intake-exhaust manifold, I believe it's not true, but I might be wrong with some manufacturers. Good explanation thought, liked it.
I've got 2012 Mazda 3(one of first with SkyActive 2L engine) currently at worry-free 158K miles. Still achieve promised good mileage, 41mpg on highways, and something like 30-31mpg in the city.
That's such a good company move. Bravo Mazda!
Diesel engines (some, Renault for example) already use this cooled egr process for some time. The reason could be the same, since diesel compression ratios are higher, knock was an issue. Good to see this being applied to gasoline engines. The egr coolers will have issues since the exhaust gases can damage the thin walls and you might get "head gasket leak" symptoms on the coolant circuit. I actually had this issue on a Renault 1.9 Dci. The egr coolers on Renault are simple to clean, but this Mazda one doesn't look that simple, we'll have to wait and see. Great video (also the previous one) love your channel.
Good on Mazda for thinking of the customer over. Glad to be a family of 3 mazdas.
Mazda is doing well on engine design. I owned a mazda3 skyactiv for 5 years now. The only thing i dont like abt this engine is that every 30k miles i need to take the intake manifold and clean the valve deposits. It seems that mazda engineer need to work harder on this.
My solution, installed an oil catch can, and problem sloved
Another cool detail of inert gas in the chamber: when the gas heat up again, it expands it's volume. By this, you get way more gas volume going out of the cylinder and generating work, but using less fuel and the perfect stoichiometric oxigen to fuel ratio.
VW’s EA888 Gen3 VW engines are also stoich designed forced induction engines. They can run in almost all scenarios at 1.0 lambda until they enrich lambda under long duration/high load conditions to stay within the 1000*c turbine manufacturers limit. The integrated cylinder head/exhaust manifold helped extend the 1.0 lambda range much further before being limited to the turbine manufacturers limitations. Now some turbo manufacturers have bumped their limits to over 1030*c which should help car makers push this envelope once again.
How do people manage to give EE's videos a thumps down? Damn, people are wicked for sure.
I think engine size may also be a factor. Compare this to the Honda 1.5. The average driver in real-world conditions is going to be pushing that tiny 1.5 hard and the turbo is going to be spooling up and going into those conditions of lower fuel economy due to higher boost. Under the same conditions, the 2.5 isn't being pushed that hard and isn't going into those high boost conditions that lower fuel consumptions. The 1.5 is probably the right size engine for something in the subcompact class (like the Fit) as opposed to the bigger vehicles Honda is putting it in. The 2.5 is probably the right size engine for a larger sedan or midsize SUV. I suspect if some of these manufacturers picked right sized engines as opposed to going with these tiny little engines, then the differences between EPA and real world fuel economy on turbo engines would be less significant.
I think since late 90s early 2000s cooled EGR here in Europe is commonly used on Diesel cars. Needed quite some time to get to petrol engines. When VW introduced the integrated and water-cooled exhaust manifold they got completelay rid of the EGR as they claimed not to need it anymore, one part less to break.
Whether cooled EGR will be a good thing on petrol engines in the long term will all depend on the quality of the EGR-valve and cooler which have to suffer from higher exhaust temps than in a diesel.
Gotta love Mazda and their R&D. They're definitely all about the customer experience and not just making profits.
Oh. forgot to mention, like the quality engineering of the engine, Mazda's fit and finish of their cars is outstanding. My ex-GF bought a Mazda 6 in 2003. In 2018 that car still looks and runs like the day she bought it. In 2003 she paid about $26,000 for it, worth every penny.
I see this time and again. Mazda seems innovative and honest.