How Mazda Is Saving The Gasoline Engine - SkyActiv-X
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- Опубликовано: 29 авг 2024
- How Mazda's Revolutionary SkyActiv-X SPCCI Engine Works
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The ideal otto engine is something you may learn about in an introductory course of thermodynamics. It teaches important lessons about thermal efficiency, and it's the ultimate unachievable goal of every engineer who's ever worked on internal combustion development.
But that certainly doesn't stop Mazda from trying. With their eyes set on the the ideal engine, they made changes from their SkyActiv-G engine to improve thermal efficiency in seven key areas. Most importantly, it's the world's first production implementation of compression ignition in a gasoline engine. More specifically, compression ignition timed with a spark plug: SPCCI. In this video we'll break down Mazda's SkyActiv-X engine, and talk about four of the major improvements they've made in pursuit of the ideal engine.
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For those with a very keen eye, you’ll notice that in the EPA fuel economy charts (0:45) Hyundai had the highest number in 2013, which goes against the claim of Mazda having the best fuel economy for five years straight. This is because in 2013 Hyundai was under investigation by the EPA for claiming fuel economy numbers that were too high, so they were disqualified. Hope everyone's having a great day! :)
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Engineering Explained E-superchargers and the benefits of the 48v system... next please
Engineering Explained The ratio is lit A/F 💯
I have a slight problem with your explanation on NOx emissions. I was taught that this very lean mixture would lead to high levels of NOx because there is just a small area around the sparkplug that burns with an optimal air-fuel-ratio ( the german word for this procedure would be "Schichtladungsbetrieb"). I thought that was the reason why they abandoned this concept for direct injected gasoline engines.
Engineering Explained if I'm not mistaken CAFE standards apply to all retail vehicles produced by the automaker. Mazda doesn't make large SUVs or pickup trucks like many of the other automakers. Nor do they currently make a high performance sports car like a mustang or corvette. I think it's a little unfair for them to make the claim of having the Highest CAFE because it's an unfair comparison.
Dude, loved the video, just want to know a little thing.
Most cars in Brazil run on engines that take both ethanol and gasoline as fuel sometimes a mix of both and most of gasoline here has ethanol mixed in it because of law. How much of this could be applied to a ethanol/flex engine without a big research and testing cicle?
Mazda has no cowards in their engineering department. Respect!
They've always been that way. Sometimes it works and sometimes it doesn't.
Yea remember when they used to make rotary engines? They always try to be different
cat remember when they won lemans with the rotary?
Not Hitler most raced car in history
Filthy Vibes the 787b is other worldly
The speed3. The turbo Miata.
This is why I love Mazda. Maximum efficiency, reliability, fun to drive, and affordable - all at the same time.
Sapphire Spire how do you know how reliable it is when there’s 0 production cars on the road with this engine right now?
Sapphire Spire Mazda’s Skyactiv-G engines have high compression as well yet they’ve been pretty bulletproof since 2013, so...
@Sapphire Spire Spot on Dude ✓✓✓✓
@Sapphire Spire
Well we had a 2013 cx-5 with the skyactiv-g engine go over 350,000 miles with no issues. When I say we I mean I am a technician at a Mazda dealership and we have had no issues with anything internal on the skyactiv engines. Now we had a few Ford engines from 2010 throw rods but no issues from the skyactiv technology platforms.
Affordable? The prototype is ten million us dollars....
"Extreme compression, supercharged engine, knock, and with a lean air-to-fuel mixture-it cannot be done!"
Mazda: "Hold my beer."
Butterffinger5678 and achieve 190hp while they're at it
LP640PR that sounds so low for a triple I engine. I guess technically it's a 3 cylinder
Sounds like a diesel.
Butterffinger5678 sounds like the most important part it the controllers and sensors aka it’s possible to convert older engines with some upgrades like the pressure sensors and a ecu swap
Richard Price it requires more than just pressure sensors and ECU swaps, there is so much more to it than that. Unless the engine you're taking about also has variable valve timing and duration that can allow it to operate on an Atkinson cycle the engine wouldn't work at higher rpm. Plus you'd also have to modify the internals to allow for a much higher commission ratio. About all you'd be able to keep is the block!
So basically, treating a gasoline engine as if it was a diesel engine. Pretty cool.
It's actually amazing how much you can improve a 140 year old technology.
OFC! When something's around for ages a huge number of set of eyes are going to stare at is and some of them will eventually improve the design.
as i recall they did something similar with their Diesel engines as well back in ~2013
To be fair, how much have we improved fire?
Modern electronics, faster than a flame front.
@@clayz1 yes. but the batteries are still not there yet.
Doing a research paper on the topic of Mazda's tech, this video was a huge help! Most comprehensive explanation of this technology I've seen.
Ohhhh you're gonna LOVE this channel then!
Cool!! Is it possible to read your paper?
@@sOleBookwood I want to read it too
This is 1 of your best video's you've ever made. You explained everyting exceptionally well!
Thanks Brick!
JustAnOrdinaryBrick a
Here, here. I will second that. Explanation was excellent, I am very intrigued. Can't wait to test drive one of these myself.
Bloody Oath!
This is possibly one of the best descriptive videos I have ever seen. Well done.
Thank you thank you!!
Engineering Explained agreed good job man.
Agree!
I knew Mazda was good, but I never knew that it was that good. I'm so glad that those engines will be there with us for quite some time!
And enthusiasts can breathe another day cause you know Mazda will offer a manual with this engine
And Inline 6 on top of that and Toyota said its hard to make an Inline 6 but they can make another V8 for lexus
@@mayuravirus6134 let's just bring back the 2jz 😂😂😂
Unfortunately, most of their cars seem to not have a manual though 🥺
Mazda circle: make good car to earn money, research rotary engine, need more money, make good car to earn money...
Other circles: stop...
Other circles : Make SUVS and Crossovers
Making inline 6 on top of that becaue Toyota turned to coochie that had been overused
I wish my calculus professor could teach as well as you lol. Great video
Thanks!
Check out Prof Leonard's calculus videos .
Rekt communist So preoccupied with Sophistry(to undermine Western Civilisation!) instead of teaching!!
This video was actually really interesting because of how mazda is changing the rule book and efficiency of gasoline engines by doing everything that everyone thought was wrong. 1 supercharger- usually you add more fuel but they do the opposite. 2 higher compression with forced induction. The ideal 14.1 air fuel ratio is way different to their 37.1. Im actually really interested in what mazda is doing which is the first time i actually wanted to know more about a mazda engine.
I thought my Toyota RAV4 was just the best thing, but now I see that the Mazda boys are right on top of the engineering for the near future.
"About 190 horsepower" is about 90 more horsepower than I was expecting. This sounds like an awesome engine! Great rundown EE!
How tf are you expecting less than 150hp from a naturally aspirated 2.0
@@Zentrify My car is a 3.8L and makes 190...
Mazda has to make up for all the Rotary engines spewing fuel out of the exhaust for all these years.
Corrosion37 true af. Thts wht i thought too.
No it spews oil not fuel if I’m correct in my knowledge
TheElementalSponges The fact being referenced is that rotary engines have worse mpg in general. Rotary burns oil as a matter of course as well
Yes all those ! rotary engines. How many?
though they sound good af!
So many variables! My poor little brain's check engine light went red about halfway through. Good presentation tho, thank you.
Finally mazda getting the recognition they deserve ❤️
It may end up like their 2.2L diesel…
Speaking as a teacher I can say with authority that you need to be teaching at an engineering university. Your explanations are clear, sequential and very easy to understand. Thank you.
Would love to see you delve into the Opposed-piston engine being developed by Achates. They are predicting 37 MPG combined for an F-150 with one of their engines.
190hp combined with insane fuel economy? I'd swap my engine if I could afford it.
Aye 190HP and clearing nearly 33MPG combined is pretty awesome , I'm waiting to see if Infiniti throws there new VC-T engine in the Nissan Altima to see how it compares
to something like the Madza 3/6.
Same here. I have a 2.3 turbo engine in my Saab 9-5. I love the turbo effect, but fuel efficient is not exactly what I'd call this engine ;) OK, it is 20 years old, but it only has 170hp and is plenty fast compared to most other traffic on the road.
Oh yeah my old man almost snagged an 02 Saab 9-3 Vector back in the day, he ended up going with a 3.5 Altima but I always through it was a sweet car.
Rene - You have the low pressure turbo version I take it? I always thought those were pretty decent in fuel economy, atleast for the time..
I have an 02 Saab 9-3 SE with the 2.0L high output turbo that has a light tune to 250hp and it is a ton of fun.. It actually gets decent mileage on the highway, but really suffers in the city.. Engines have really come a long way in terms of fuel efficiency in the last 20 years it seems.
190hp is pretty weak. 250hp would be my bare minimum considered when buying a car.
Mazda is basically at the forefront with internal combustion engines. Makes me proud of owning Mazda products!
Striball Absolutely correct. If not for all the green subsidies electric cars and renewables technology wouldn't even be able to get its foot in the door. Last time I checked the rare and precious metals mined from the earth to make the worlds most efficient batteries aren't exactly in abundant supply (unlike coal and oil) either. The world is looking in all the wrong places for it's 'answers'. But not Mazda. Evolution, not revolution, and engineering of ever greater efficiency for the internal combustion engine.
Damn straight.
Jason McMillan batteries have the capability to be made from clean renewable materials. Lithium and other metals aren’t absolutely required to make batteries. That’s the thing about electric cars, they have the capability to be 100% environmentally friendly, something ICE engines will NEVER be able to achieve. It’s literally impossible, but it is POSSIBLE with electric cars. Eventually electric cars will be able to be manufactured in clean factories with 100% renewable materials and battery packs will be manufactured with 100% renewable materials and the electricity used to charge said batteries can be sourced from 100% renewable sources
@@gewdvibes You're living in a fantasy world!
terry jenkins not really, there’s entire states that are 100% renewable already
imagine if they brought out a smaller engine (90-100HP at 1-1.5L for example) with this tech in the EU. They would sell like hotcakes.
like cross-overs
No they wouldn't.
@@zondaboy6493 why?
Yeah or put this one in a multi purpose lightweight pickup like the old navara... hot cakes in Asia Africa South America and northern europe
They just did, the mazda 2
Go Mazda! They’ve always been my favorite cars I’ve owned. Fun, affordable, and economical. You really can’t ask for more from a daily driver!
Great video. This is the Swan song of the ICE. Reminds me of all the refinements made to steam locomotives just as railways were switching to diesel electric.
Without fail, yet another AWESOME video from EE (and I have been a subscriber for years)! As always, can't wait for the next one. My mouse is worn from the "like" button lol.
Keep them coming!
Thanks for such kind words!
My finger is sore.
Wow. as a fuel economy geek, i am super stoked.
Love my SkyActiv-G - No freaking CVTs here... Mazda FTW
i am a flight instructor, and i have used many of your videos as teaching aids. especially the wet vs dry sump oil systems, and some other videos that explain the 4 strokes, as well as your fuel octanes explanation videos and turbo vs superchargers, the list goes on.
excellent content, and really great teaching aids!
awesome drawings and explanations.
thank you so much!
man your english is very good to understand, i'm brazillian and not fully learned english and i understand clearly all of your videos and help me a lot with my college.
Another reason why we'll mourn the loss of the IC engine - its just so damn cool. Great vid man.
190hp Miata and more fuel efficient? Take my money!!!
oh yeah huh. I wonder if this fits in my miata
@@69ER509 It should, the ND1 have an aftermarket supercharger that works, so the new ecocharger could be crammed in there.
Really the dream for the miata would be a rotary SkyActiv-x engine; as from what I can tell from the miata forum, is that the ND are hard to improve/have not had the time needed to perfectly map out ways to improve performance. We would probably expect similar/slightly worse efficiency to the current miata, but engine displacement would get a lot bigger.
JV the changes you would have to make trying to retrofit that engine would probably cost more than the car itself
You are very intelligent and I love the way you explain everything. I've always been curious as to what your education background is and if you work/have worked in the automotive industry. Care to share? Just wondering how my go-to guy for explaining new automotive technology ended up doing such an awesome job at it.
I appreciate the kind words! I went to school for Mechanical Engineering at NCSU, and then worked briefly as an application engineer and then a test engineer for a forklift company. Forklifts are a lot like cars, they're just way heavier and use don't require quite as much modern tech as a car. From a powertrain standpoint though, efficiency is equally important.
Interesting and ironic since forklifts are one of the few types of vehicle where it already makes economic sense to us batteries or even FC in instead of an ICE.
Yes, the company I worked for made gas, diesel, LPG, CNG, electric, and fuel cell vehicles. Whatever the customer wants, and yes, electric made up a large percentage of sales.
Any hybrids? I doubt it due to cost, but I can think a few scenarios were it would be useful. And thx for taking the time to respond.
Yes actually. When I was a test engineer I worked directly on hybrid development.
Hey Jason, I know this is an older video, but just wanted to give you a big thank you for such incredible presentations of valuable information. Every video feels like a college course, and for someone that could never afford higher education, just wanted to say thanks man
Just want to say I love your enthusiasm and the way you take people through things step by step without being patronizing. Thanks!
I assume that test engine is a 2.0L...Not bad if it makes 190hp. Thats 35hp more than the current engine while still being cleaner and fuel efficient....Also a few hp more than the current 2.5L.
Yes, 2.0L.
I was wondering this the whole time. You should put a pop-up thingy on the video that mentions this.
It is supercharged tho
Yup, it's pretty damn good for a small, efficient engine that is using the supercharger NOT solely for extra power here.
It doesn't add more fuel with the extra air though, like how you would use a supercharger normally. It's only to lean out the AFR.
The biggest mistake Ford Motor made was breaking it's partnership with Mazda. Ford couldn't make a decent small car until they partnered with Mazda.
Dennis W not really. They just copied mazdas blueprints and boom. However new engines that aren't 2.3 are garbage.
yep, their 2.3 ecoboost looks so similar to the mazda disi 2.3, though everything was stamped FOMOCO in the mazda.
The old fords w mazda engines were the best, pretty much all the gt models besides mustangs, probe, escort...
travis seuren your statement proves that Ford can't make good engines.
Some would argue Ford hasn't made a good one since the partnership ended either. The Festiva is an embarrassment.
I can’t wait for the next generation of Miatas with the SkyActive-X engine. They already get ridiculous MPGs yet deliver a fun experience.
And if they did stuff it in there, it would be a nice power bump!
Engineering Explained Amen! 190hp in a Miata is what a low boost turbo/super charger setup gets you.
C’mon Mazda, get to it!
MeeMoo220 You should see the Suzuki Cappuccino with a 13B Turbo.
The Raging Storm that sounds like the best bad idea ever.
MeeMoo220 It's there on youtube. Probably not fuel efficient and it a bloody tight fit. But I bet it's a blast to drive.
I can’t believe I actually understood everything you said. You’re awesome.
I wonder how this engine will hold up in the long run, when carbon starts to build up inside. With such a precisely made engine maybe some carbon buildup will mess everything up. Hope not.
Direct injection might do that ,the inlet valve might carbon up
Thinner fuel mixture should mean less carbon build up. More towards complete burn.
So far no problem, I have a 2015 mazda 6 which I bought in 2014 and I still drive it today. City driving pretty much 28 miles per gallon average and takes off faster than most cars. BTW my ieloop stopped working which usually adds another 1 or 2 miles per gallon.
Would love to see if they could improve it further by adding Toyota's D-4S technology that combines direct injection and multiport fuel injection in the same engine.
Love your videos man. Thank you for uploading this!
Thanks for watching!
"not super powerful engine, about 190hp"... IN A MAZDA 3 !!!! I am still convinced Americans have different horses than us. If it had 110Hp it would be "not super powerful".
If we could get the usual "slow but efficient" cars that normally have around 60-110hp up to around 190hp standard with the same or better fuel efficiency... that'd be damn amazing. You could focus on just buying purely for MPG and still get a decently quick car. Sounds great to me.
Americans built 6 liter V8’s with 110bhp. Hearing Americans talk about something being powerful/efficient is weird A/F.
@@Ticklestein What 6 liter engine made 110bhp when running correctly?
Americans are used to having almost 300 hp V6’s making like 20 mpg average. I am anyway, this is kinda low in terms of overall scale of “power” but the cars are light at the same time, with geared tranny’s, not those shitty CVT’s. And the cars are low with tightish suspensions. So IMO they’re fairly quick.
Cars HP are not real HP ( 1HP = 550# / 1ft / 1 sec ) car hp = 1 hp / hour .
Man I like Mazda. They're cool cats
ChaosPotato
Yes they are very nice cats indeed.
Yeah, when you're combusting so completely your cats stay cool!
Zoom zoom!
cats, he he he.
Zoom Zoom Zoom Cats.
I just bought a new CX-5 and I didn't understand anything about the engine. I thought the turbo was just to make up for the wimpy engine, but now I understand it's more for making the engine more efficient. This makes me very happy to understand all this. Excellent explanation. Thanks.
190 hp really isn't bad for a super efficient engine
to the contrary, i would say it's really good
Might just be my European mind, but 190 is plenty enough for a hatchback or some sort of non-American family car.
190hp out of a 2l, yeah that's pretty good.
190hp actually really impressed me for power output from what's supposed to be a super efficient engine. Usually you're lucky if you even get 100hp with insanely high MPG cars (electrics are a different conversation) lol.
I've got a Mazda3 with the 155 hp engine and that's really enough for how light the car is, and I've driven a Mazda6 with the 184 hp 2.5L engine and it really gets up and goes. I have high hopes for this engine.
The amount of math that went into this Engine development must have been so satisfying.
Wish you would teach my Physics and Calculus courses 😂
So proud to drive a Mazda! I've been a fanboy since before I even bought my first car (2005 Mazda3) which two years later traded in for a 2008.5 Mazdaspeed3 and till this day still continues to give me plenty of "Smiles Per Hour" Sorry Volkswagen owners.
Mazdaspeed 6 was awesome!
You are missing out on some details.
In a gasoline engine the stoichiometric mixture is defined as the mixture which generates the least pollution without destroying the engine (defined with technologie from 1975). The fact is that the mixture is rich and not all fuel will be burned. They limit the air intake with a throttle body to limit the burning time (no oxygen, no fire), to prevent the burning off the exhaust valves. They extinguish the combustion with additional fuel. If you lean out the mixture you will get more power.
The knocking (self combustion) only occurs on lean fuel mixtures.
I have read an article more than 20 years ago about the fact that liquid fuel doesn't burn. The principal is like a log of wood on a fire, the flames will never ever be able to burn the core off the log, first it has to burn off the out side of the wood layer by layer to eventually burn the core. The process off burning the liquid fuel, vaporize it and then burn it is a process to slow for a combustion engine. That is also the reason why a car is very fuel inefficient on higher speeds, the engine moves to fast for the burning proces.
But if you take wood sanding dust and through it on a fire you'll get an explosion, my boss burned his eyebrows off. To burn fuel more efficient we should vaporize it before it enters the engine.
i have a 2015 mazda 3 and one thing i notice about the economy is that the outside temp can drastically change my economy. there is a road i drive every day and i average about 6.4 L/100km. that is at -15 or colder weather at this time of year. well, we had an unseasonably warm day and the temps got to above freezing and my economy went to 4.3 L/100km. that is a drastic change and i cant wait to see what i get in the summer.
Lean AF!
7:25 - The lean supercharger is not to improve performance...
Oh it'll improve performance... just give the tuners about 6 months after its release
maybe not actually. The engine is very precise in when it sparks, so I don't see many ways it could improve performance. It would make the mixture less lean, therefore defeat the purpose of the engine.
yeah but then he explained what it does (puts crazy amounts of air in the engine) and.....isnt that increasing performance? lets pretend that they did this without a supercharger first. it would be considered underpowered because in order to get the correct air/fuel ratio, it would have to inject less fuel. so then they introduce a supercharged version. everyone would say it is for power even if it is only to get HP figures up to todays standards.
@@spencerphilippinedream3706 lol no cause 190 hp for a n/a 4 cylinder is very up to hp standards, but would require more fuel. This engine being able to run so lean, it needs the charger to even supply the amount of air it needs
@@tlpusher9652 you said almost exactly what i was trying to say so im not sure that i explained it very well. you dont "NEED" a supercharger to get 37:1 air/fuel ratio. simply inject less fuel. in that scenario, you would have very efficient engine but under powered. right? if you injected less than half the fuel (to get 37:1 instead of 14:1) the engine would create about half the power (95 HP).
superchargers are parasitic. it cost HP to gain HP. so for max "efficiency" a supercharger isnt needed. this is why i say, the supercharger is for power, not efficiency.
i think a n/a engine would be MORE efficient. however, it would have to be double the displacement to create the same power as a traditional 14/1 air/fuel ratio. so 2.5 liter power from a 5.0 liter displacement. that doesnt seem like good marketing.
and the reason they cant use a turbo (NOT PARASITIC) is because turbos dont provide boost at idle. so not only would it be HALF as efficient at idle, but probably wouldnt pass emissions.
this response just got too long. the bottom line is that i believe this concept is possible for a n/a engine but nobody would buy a 95 hp engine in 2020. so mazda decided to supercharge it up to 190 hp but when confronted with "190 hp isnt that much for a supercharged engine" they responded with "it isnt for power, its for economy". there are much, MUCH easier and cheaper ways to increase the air/fuel ratio than by supercharging.
@@raynic1173 Dang, All this sarcasm for disagreeing with them saying that their "supercharger is for economy"? i never claimed to have some great idea, so im not sure where you got that from. this is common knowledge, but you can choose to believe whatever you want.
im sure you will respond with how you are right and i am wrong, so go ahead and get in the last word. it doesnt bother me because im not interested in continuing a conversation with you.
Rotary engine to this? Damn mazda you finally got it.
Udith Dilshan no keep the rotary
Need a new rotary
My theory is that Mazda has been putting the effort into making internal combustion engines more efficient in order to use that technology to bring the Rotary back.. The Rotary engines main problem was always getting clean and efficient combustion, so if they can perfect the design the Rotary could be a real game changer for the ICE.
Previously owned a 2006 DC5 with a k20z1 engine. Sold it and bought a 2015 Mazda 3 SGT. The Skyactive engine is pretty awesome that it can operate on 87-93 octane with high compression and no knock. Non-noticeable knock. I love Honda engines but they are so temperamental in the fuel they use, especially in the ivtec engines. I am speaking about a 12 year advance/difference in ECU engine management, so it's not really apples to apples. Speaking of gasoline engine advances, what happened to the Scuderigroup and Duke engines? Yes, my Mazda can achieve up to 41 mpg hwy @ posted speed limits calculated with pencil and paper, the onboard mileage app and Palmer DashCommand. Thanks for the upload!
I've seen the future of motoring, and it's ICEy.
Can this be combined with Nissans variable compression pistons? If So, will this fit in my Honda ?
alex moore ah my fellow mightcarmod fan
My first thought was swapping one into my older Nissan. Wonder what it sounds like.
I would like to see this engine combined with Nissans variable compression pistons, with the capability to rev to 12k, I wouldn't care if it's gutless (lack of torque) and placed in an RF mx5. That would be the best drivers car of all time.
As best as I can tell, a combination of both technologies would be superior, but there's some overlap in how they are achieving better efficiency, so there's some diminishing return.
YES. IT WILL FIT IN YOUR HONDA!
alex moore variable compression piston?
I lost you 3 times got it right the 4th time muchas gracias
De nada amigo!
Mazda, the opposite of Volkswagen. They do a really good job.
Bürguerauto? only for the richest?
not only monkeys, also humans... and most important: test shows that modern tdi exhaust gas are more harmfull than exhaust from a 20 yrs older ford powerstroke powered light truck...
hawkseye that's why I dumped my TDI for a CX-5!
They admitted to doing tests on monkeys but deny using humans... So stop monkeying around with this story :)
And it depends what ur pollutant ur testing for and therefore r calling harmful and its no rational for bring back a 20 yrs older ford powerstroke engine
Tony x
Huh, wonder what my Bayerische V8 puts out 🧐
Three Mazdas: 1991 Miata MX-5, 2004 RX-8, 2014 CX-5 and still going strong at 136,000 miles. All bulletproof cars and hella fun to drive with great gas mileage. I'm looking forward to my next. Long live the internal combustion engine!
The amount of engineering that went into designing that engine is just incredible
Mazda is making up for all of the gas guzzling rotaries
Rotaries does for our mpgs
Chinmay Chinnu. Rotaries dont get great mpg for their displacement but they do well enough for their output. The rx8 got similar mpg to the S2000, even though it was a larger car with vastly better specific output.
totally worth it
DrewLSsix I don't think an S2000 runs 18L/100KM around town honestly, but I admit I am not familiar with the car. Does it really?
Sergiu-Lucian Petrică. Dont know the metric conversions but the rx8 gets two fewer mpg than the s2k, both get rather poor in town mileage similar to my truck lol. The s2k does get a bit more range on the highway but is also a significantly smaller car with significantly lower specific output.
If you look at the per liter output of these things the mileage males some sense, a 4 banger of just 1.3L making 200+ HP naturaly aspirated would doubtless get worse mileage. Meanwhile the rare rotary detuned to typical piston engine outputs can get very respectable mileage, but thats not the selling point in most applications.
I wonder how reliable these engines will be? I think it's cool and I admire Mazda for doing something different and going against the grain, but Mazda just made the gasoline engine much more complex in the name of efficiency. It's a good thing and a bad thing. I wonder if it will be a pain in the ass to trouble shoot when something goes wrong.
Von Ace that was my question, a ton more sensors... yes those that go bad without warning, lot more computing perfection on a mechanical engine and those super high compression ratios... a bit hard to keep it all balanced and in harmony for long. But let's wait and see how do they perform on the long run.
I can't imagine maintenance on these will be any worse than many of the small, turbocharged engines popular in Europe. Nowadays, most new engines are very complicated, so this one, comparatively, shouldn't be too bad.
Von Ace
Like how steam engine do in their last stand against internal combustion engine
Lol engines will always get more complex. Thats how progress is made.
I really love Mazda for what they're doing... so I want to support them by getting a great used Mazd... right... me buying a used Mazda doesn't help them :/ but I like my 80s/90s cars lol, what can I do ;/
The quick burn idea is used on over Square motors like a 1994-03 zx9r with a 75 bore x 51 stroke. recommended cheap Quick burn 87 Octane and 45 degrees of advanced timing for the 12k red line. 12.2 to 1 compression.
Finally, a channel that I can understand, appreciate - Thanks.
Thank you for your outstanding explanation about the Skyactive engine theory.
I have a question regarding higher octane useage in this engine, and I will devide it to two parts:
1. Knowing that this engine requires "knock" to occur for its operation, what will happen if you were to put ideal fuel in it (100 octane? the kind the would't knock...)?
2. In my country, the lowest octane we have is 95, and the highest is 98. You said that the ideal fuel for this engine would be 80 octane, so as it gets higher it becomes less efficient? Is it true to say that every Skyactive engine being sold in my country doesn't live up to its potential?
Thank you for your time, and for satisfing my curiosity!
Us ron is different to UK ron
91=98
The latest info is that mazda has 2 versions of this engine a "US" version and a version for europe each tuned for different octane fuel. also the version for the us has a 15:1 compression ratio and the UK version will be 16.3:1, so you will not need to worry about the fuel it will be optimized for your higher octane fuel.
Could this technology be combined with Nissians VCR engines or is that sort of unecessary? Sidenote, it is incredibly impressive that they can do this on 87 octane. When you first started explaining this I thought "wouldn't buy it, I don't want to pay for premium gas." If they offer this in a car with AWD, I think I know what my next car will be.
The techs are different approaches, rather than combinable technology really. This engine is trying to be as efficient as possible rather than having a high power mode. As is, it has electronically controlled valve timing which can alter the compression ratio significantly lower than 16:1 if desired.
Engineering Explained I am pretty sure 95 octane is the cheap fuel in Germany... so this engine would run worse here?
They use a different way to measure octane rating in the US, their 87 octane is somewhere around 91 european octane. It's still lower, but not as much as one would think.
Engineering Explained thanks for the reply, which technology will yeild a better consumer product.
Which one would you say, in any objective way, is better? Which one is more exciting to you?
This is why I love mazda❤❤❤🚗
Thanks for making this very detailed video of the new Mazda Engine. I"ve seen others, that were not so complete, so I had a lot of questions. After watching your version - now I get it!
My mom has a Skyactive Mazda 3. She's had it about 5 or 6 years and gets rediculiously good mpg, so much so that I bought my son an older Mazda 3. He gets pretty good mpg, but not what mom gets (his is a pre-Skyactive engine too). But Mazda is clearly the leader in "efficient" internal combustion engines, and I love that Mazda still builds cars for "drivers" vs commuters.
it would be good to compare this engine to the new infinity variable compression engine
Mitsubishi had something similar many years ago called Mitsubishi Vertical Vortex (MVV)
Even earlier was the use of jet valves.
Best thing Mazda can do is sell this technology to all manufacturers and let everyone try to improve on it with a small licensing fee. Everyone benefits and Mazda gets a piece of the pie, too. This might allow the internal combustion engine to hang around another 100 years and keep those pesky electric motors in golf carts where they belong.
Absolutely brilliant, glad to see that at least the internal combustion engine's sunset years are also it's golden age. The great change is soon upon us, maybe it's for the best, but these days will be forever, fondly remembered.
ANOTHER BRILLIANT VIDEO, Jason! VERY EXCITING what Mazda is doing! THANK YOU for explaining it SO WELL! Greetings from Switzerland, Rob (Also it makes me proud to be a Mazda (MX-5 NC) owner!)
I want Mazda to continue working on the rotary
TheElementalSponges Maybe after they master this engine then they transfer all that tech to the rotary
They never stopped...
Imleocalm true, but they haven’t said much.
TheElementalSponges Yes they did. The most efficient variant of a Rotary Engine is one that runs on HFC. And their are VERY few HFC Stations in the world.
TheElementalSponges. They have been working hard at establishing them selves post Ford. Hopefully in the next few years they will push towards more performance options, but for now they have done a spectacular job righting their ship!
The variable compression technology from Infiniti and this SkyAktiv-X technology from Mazda = world piece 😁
Nissan*. Infinity is just a brand name
Piece of what? Cake?
He can call it by its brand name if he wants. No need to try to be pedantic about it :)
PS I still plan to call cars from Mitsubishi by their brand name too, if that ok?
Mazda has a joint venture with Toyota already so lets see about hybrid designs that can come from that venture?
And the engine gets more complicated then ever. That means lower reliability, higher maintenance cost, and shorter lifetime. And you still don't have torque at low rpm like electric motors.
now, imagine this tech combined with Infiniti Variable Compression :)
Up to 47.4 mpg on my 15 minute work commute with my '17 mazda3 according to fuel monitor. That's with one complete stop and two near stops. I'm confident I can get 50 with some luck. These skyactivs are crazy efficient at cruising in the 30-60mph range.
Be interesting to see what numbers these models actually bring at a steady cruise
Just about to swap cars to a Mazda 3 from my MX5 ND2 - I’ve got an easy 58mpg from the MX5 which is unreal! Looking forward to upgrading to the x engine
"The SkyActiv Engine: would it be the next legend after the rotary?"
Hmm...maybe?
For saving the ICEs, Mazda is da real MVP❤️
Mazda is not saving anything
16:1 compression is crazy... my 2.2 diesel engine is 15.7 compression.
Yep! Mazda even has 14:1 CR diesels.
Pretty high for a gas engine, my 3.0L diesel is 16.5:1.
BrianNC81 That's what I meant to say. I was comparing it to my diesel!
Engineering Explained Whats the advantage of a "low conpression" ratio for a diesel? I commonly work on older Land Rovers which have 19:1 compression. As far as I know, older diesels have far higher compression ratios than modern. I know they're turbocharged now, hence lower but why THAT low for the Mazda engine?
LewStep With a high compression ratio the temps and pressure were higher, causing combustion in small pockets of air+fuel before it had time to mix well. They wanted better NOx emissions from more even combustion and heat that is spread out instead of localized and intense. They're also running 24 psi of boost with a compound setup. The race version of the engine was running 12:1(I think) compression and 70 psi of boost.
I had 5 different Peugeots over the years, I know,I know, they were rally bred but they have gone the way of the dodo. My last 308 was a disaster and couldn’t wait to get rid of it. The engine a 1.6 litre diesel was a collaboration with ford so just a run of the mill engine fitted to Volvos minis and ford Peugeot and Renault. I researched other cars and I couldn’t find any bad reviews. Turns out I bought one and what a pleasant surprise. The suspension and handling are supreme. The braking system is excellent and the fuel economy is outstanding. 6.2 litre per 100 km using a low octane fuel out of a 2 litre engine.happy customer.
actually the diesel does not combust as rapidly as you may think. Depending on the torque level, pedal position the injection will continue for some time after the piston starts its descend. Constant temperature engine vs constant volume. Just a minor adjustment to what I would think is an excellent video explaining these differing engine designs.
Well, imagine mx5 nd with 2.0 skyactiv-x, 190HP while doing something like 40MPG :D
4 me perfect cheap to own fun car
40MPG That is AS close AS a hybrid or even better
And then oil corps come in and say it's a dangerous engine bla bla bla increase fuel consumption bla bla bla
Perfecting the open cycle steam locomotive. Congratulations Mazda.
just wait for the two stroke boxster comeback.
The high air-fuel ratio was first started by engineers 30 years ago. It did not work at that time. Mazda made it this time using a procedure that you eloquentlty explained. Thank you for bringing this up. Mazda is my guy now.
I’ve been a Mazda fan since my family had a 323 hatchback(called GLC in the US). It was a solid car.
I learn something every single time I watch your videos. I'm smarter for it. NEVER compromise the detail (which you don't it seems) If I don't understand something I'll just go and research it further.
190 HP not powerful? is same as your Integra.
I had the GS, so my Integra was only 140 HP haha.
damn shame :D but 190 is not really a weak engine. I missed the displacement tho... is it a 2 liter? I mean Mazda.
Engineering Explained Even my 90 Integra cruised so well at 120...like no big deal.
yeah but an integra weighs about 500 lbs less than a mazda 3 though
I love what they are doing, but I worry this complexity will make these engines very likely to fail and hard to repair.
Why is it complex? Most tech is found either in a diesel or a petrol already. Mazda just found a smart way to make it work
mazda are a pretty incredible company sometimes
Have a Mazda 2018, 1.5 Diesel and its fuel efficiency is fantastic!!! Better than my Smart 600cc!!! Problem free, reliable, 105hp and drives fantastic. S5 engine code. Exhaust pipe is always clean!!! Gets 33km/ltr on highways and 23km/ltr in town!!
I loved the 3D portion of the video showing the combustion/ignition in the cylinder. It helps with your white board drawings.
I love it
Carbon build up said "hi there! Let's see how hot this gonna run after 3yrs." LoL.
Hope Mazda has figured out a way to keep the combustion chamber temp low so they don't need egr anymore.
@@sdqdfyl GM has had no EGR on their LS platform for years. Besides that, since this engine is a direct injection engine, the crankcase vapors being routed in the engine intake will cause valve coking. Most direct injection gasoline engines have this problem. The best solution to prevent the valve coking is to vent the crankcase to atmosphere, you can use and electrostatic oil separator, or a centrifugal oil separator. Most modern diesel engines are set up this way. My favorite and cheapest option would be a draft tube that exits below the engine compartment.
When the miata comes with this engine I'm getting one
It'll sell like hot cakes
The Miata has come with the skyactiv G platform since 2015 guys ¯\_(ツ)_/¯
@@jacksonlee2279 this is a new engine
yea, it's new, the sky-active x
That was a great explanation, I have a Mazda CX3 (2017) 2.0l which is stamped with a Sky-active badge...I had no idea really what that meant until I saw you explain all this. Ive always had Mazda's, great drivers cars, and this new one is no exception, it is incredibly light on fuel while still being great to drive and very punchy..Averages around 6.5Litres per 100Km, for you guys in the states that is 36.2 US Miles to the Gallon, on combined city and freeway cycles.
I have this engine for 3 years now, it's so smooth at low rpm, so fuel-efficient you don't have the economy of a 2.0 naturally aspirated, more like the same as a turbo 1.5 or 1.4 from the competition. And it still has some punch especially above the 4200rpm range where it doesnt work in "diesel" mode but regular gasoline mode so you get all the power.
I recommend y'all to try it out, it makes a fantastic daily driver in a country where gas price are high (Europe) without sacrificing too much on power. And i guess it's pretty nice for the US too, but if were living in the US i would definetely go for the 2.5 turbo for the power and fun as gas price is not a problem there.