Why Does Volkswagen Have A Water-Cooled Exhaust?
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- Опубликовано: 20 июн 2017
- Volkswagen's 1.8L Turbocharged Engine Has A Water Cooled Exhaust
Why VW's VR6 Engine Is Dying Off - • 4 Reasons Why The VR6 ...
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From VW's Press Kit On The EA888 Engine:
"Volkswagen has a long track record of producing small-displacement engines that achieve high levels of performance and efficiency, and the new EA888 engine is evidence of that deep experience.
Like its predecessor, the engine has a cast-iron cylinder block and an aluminum-alloy cylinder head which now has the exhaust headers cast integrally. The cast-iron crankshaft runs in five main bearings. The twin overhead camshafts are chain driven, and there is variable cam phasing on the intake side.
With a bore and stroke of 82.5 by 84.1 mm and a displacement of 1,798 cc, the 1.8T engine packs quite a punch, with peak output of 170 horsepower at 4800 to 6200 rpm, matching the horsepower rating of the larger 2.5-liter five cylinder, but delivered at 700 fewer revs. The new engine offers seven pound-feet more torque, produced at just 1500 rpm-a whopping 2750 revs less than the outgoing 2.5’s torque figure. The torque curve is strong and flat, with the peak figure being delivered from 1500 to 4750 rpm.
The new engine also returns much better EPA estimated fuel economy figures than the 2.5-liter engine. While the actual fuel economy varies by model, the Jetta equipped with the 1.8T and a six-speed automatic transmission now gets 36 mpg on the highway, up from 31 mpg for the 2.5-liter engine. At the same time, the city mileage improves from 24 to 25 mpg, and the overall EPA estimated combined fuel economy is now 29 mpg compared with 26 on the outgoing five cylinder. As well as offering better fuel economy, the new engine’s additional low-speed torque has enhanced the performance of the cars fitted with the engine: the manual transmission Jetta 1.8T now goes from 0 to 60 mph in a manufacturer estimated 7.3 seconds, an improvement of 0.7 seconds over the 2.5-liter model.
One of the keys to this improved performance and fuel economy is the reduction of internal friction. Several innovations contributed to this reduction including; the use of a new piston coating; the two balance shafts that counteract the second-order inertial forces run in roller bearings; utilizing a low-energy oil pump; and using a highly precise electric system to control the oil-jet cooling for the piston crowns.
Turbocharger and Direct Injection Improvements
The turbocharger in the EA888 is an all-new design that develops a relatively high boost pressure of up to 19 psi (1.3 bar). Key features of the turbocharger include; a turbine wheel made from a new alloy that can withstand exhaust temperatures of up to 1796 degrees Fahrenheit; a pulsation damper; the addition of an oxygen sensor mounted directly upstream of the turbine wheel; use of a compressor wheel machined from solid; and a new electric wastegate actuator that adjusts the boost pressure, when power is not needed, to help reduce fuel consumption.
Thermal Management
Thermal management is key to helping ensure maximum efficiency. The thermostat keeps coolant temperature between 185 and 225 degrees Fahrenheit, influenced by load and engine speed, to achieve the ideal balance between minimal internal friction and temperature management. By directing exhaust gases through the water-cooled exhaust manifold, they are approximately 160 degrees cooler by the time they reach the turbocharger.
Under full load, heat is significantly reduced thanks to the integrated cylinder head and water-cooled exhaust manifold. This new design eliminates the need to enrich the air/fuel mixture under full load, resulting in a reduction in fuel consumption of approximately 20 percent when driving at highway speeds."
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Gives a new meaning to having an exhaust leak
lol XD
Just another thing VW can bill you with or go wrong and leak,, And you could imagine if it was an enclosed system just for the Manifold, "You need your exhaust coolant flushed its an extra £39:99 to your bill Sir" you'd think it's April fools
Duke Silver having an integrated exhaust manifold mean less chance of a leak. You know, with it being ONE piece.
Brannen Thompson But its not a separate system for the exhaust cooling. So your argument is invalid.
BubbleTime absolutly right. It is one piece with the cylinderhead and is therefor under huge termal stresses anyway. The chamber wall of the combustionchamber is integrated as well as the waterchannels outside the exhaust ports. I'm currently building a combined heat and powerplant with an outside heat exchanger on an normal exhaust manifold and it is very difficult to get the stainless steal tubes together and so on. If this would come in a diesel engine it would be perfectly suited for that task. Just think about it. It could be an incredible cheap solution to a otherwise relatively difficult and expensive task.
So VW please build a diesel of this technologie, at least for the german market ;D
for overclocking ;)
Line load calibration 2 :D
inb4 review samples will have good samsung ram and production models hynix ram.
Zoidberg take three steps to your right!
this man
Since when does PCMasterRace watch Engineering Explained
It appears that I'm four years late to the party but this video is great! I appreciate the effort you put into detailing the workings of the water-cooled exhaust on the EA888 . . . I have four of them so this was particularly enlightening! Kudos and keep up the great work!!!
The absolute number one place to learn about cool new car technology. Thanks man, love the channel!
Honda did it like 20 years before...a lot of new technologies actually came out earlier than you'd think
1:42 one of the cooler benefits
World Traveler东北 Nice pun haha
And the turbo might have more booze too.
no, the turbo will make less boost, not more. Heat = energy, it's why turbo blanket's are a thing
World Traveler东北 lol I see what you did there
Turbo blankets don't exist for that reason... haha! In an engine, nearly all heat is wasted energy. Turbo blankets are just to keep the heat from spreading to the rest of the engine on cars running high boost levels.
It would be interesting to know how they manufacture that head, with so many complicated internal structures.
Heat coming from the defrost/vents sooner in the winter is going to sell a lot of cars in Canada.
Kind of the opposite of my air-cooled VW bus. The defrosters only ever get warm if it's above freezing.
it also is to help with turbo cooling after engine shut off, there is an electric water pump that kicks on and curculates coolant around the exhaust manifold and turbo to reduce hotspotting
I was wondering what that noise was
Its there since 80s.... got it on my golf mk2 1.6 td 59kw...oem...
The electric water cooling of the turbo existed on the 1.8T 20V. One could hear it running after you cut off engine and locked the doors.
Thanks for random trivia that I will never have a use for in my life. Feels almost like I'm back in school.
Honda did the internal exhaust manifold 20 years ago upon the 3.2 v6 used in Honda Passport and Saturn Vue.
And? Does it help? Is it reliable? Do they produce this system still?
@@Nitramrec I don't know whether Honda still makes a derivative engine. The 3.2 has a good reputation.
@@Nitramrec they use the same principle in their newer L series 1.5 - exhaust manifold is incorporated in the head, turbo bolts directly to the head. It's been quite reliable so far.
@@Nitramrec yes they still make the j series 3.5l v6 for suvs and vans. has the same exhaust design.
GM did it 30 years ago with Opel Calibra.
You are just a PERFECT teacher!!! thank you very much for sharing up-to date info with us :)
I just love that you have all the things in the video shown on the board
Yay alltrack! I've been excited to hear more about this car from you.
Incredibly great video. Thank you Engineering Explained. 🤝
Funny, the Mercedes OEM 636 engine from 1949 has
a pretty similar layout. Only difference, it's a 4 pot- to two exhaust-layout.
And it heats up super fast, too.
Thanks! I love these technology reviews. It's great to see incremental improvements appear in modern engines. I very much look forward to the release of Mazda's HCCI engine (hopefully 2018, hopefully on the MX-5) and one of your technical tours of it.
the two exhaust ports are not because of twin scroll turbo. I suppose one port is from cylinders 1+4 and the other is for 2+3. The reason is to produce continuous flow of exhaust gases and to prevent exhaust gases back to the induction phase of the next cylinder to fire. I hope I expressed it correctly, I am not a native English speaker
You don't need a manifold design like that to "prevent exhaust gases back to the induction phase of the next cylinder to fire". What you are suggesting could only happen if the valve timing was seriously wrong. The valves and cam timing are what stop exhaust gasses flowing into the other cylinders, not the manifold design.
noxious89123 l
it happens, although not a lot on more modern engines. if you check older high performance engines like for example the Alfa Romeo Nord engines they always have split exhaust manifolds. I don't want to insist but I'm quite sure it is one of the reasons that the pairs are 1+4 and 2+3. so one of each pairs fires at each time. cheers
yes you are right, its designed that way so that one exhaust cycle does not cause turbulence to the other and sometimes it adds a bit of a scavenging effect
You are correct. Firing order is only part of the equation due to overlap.
Although not turbo'd, I think you'll find GM have had this for many years on the 3.6 V6 HiFeature for the same reasons.
The 3 cylinder exhaust pulses greatly simplify it as well, unlike VW needing 2 separate routes for exhaust wave tuning.
Excellent, I really like your style explaining this in 6 minutes with a whiteboard and some screensharing!
Imagine a “cracked” manifold
That would never happen to such a well designed motor, VWs are very reliable..
..buahahahahaha🤣
PrimalMiltos This engine has been out for over a decade. Number of cracked manifolds I have seen (I work on these for a living) zero, zilch, 🍩 ....
Also the real reason these have coolant in the exhaust is to cool the turbo. Nothing more.
@@LynxStarAuto now if they could only make the rest of the motor/car reliable 🤣
Being a part of the cylinder head with all that metal surrounding it that might make it somewhat stronger.
@@LynxStarAuto So just have a water cooled turbo.
I might add, This set up in fact reduce the likelyhood of a leak by keeping
everything in a controled temp and providing a more even heat distribution (metal expension) from the Iron block vs the alluminium head and eliminating some of the gasket and
joints where leaks usually occur. The material is alluminium so rust is a
non issue unlike some 5.4 Ford V-8 lol
Brilliant, amazing how simple things make the most sense! Additionally, (seems to me) with a steady temp, you would have far less failures of the exhaust manifold / gaskets, and it would last longer. Just remember to flush cooling system regularly.
I do love those videos, short and simple, you'll get a mention when i get my automotive technician certificate
A very good explanation of how this system works. Thanks once again for another informative video.
Water-cooled Exhaust + Anti-Lag system = Steam Engine :]
@@trp2413 What about the part where he said that all of this was to reduce the temperature of exhaust gases so the car could run lean and not damage the catalytic converter?
Next comes the hydraulic supercharger and hydroelectric turbines. Straightes road to the happyhome.
@@jzk3919 I've often wondered why no ones tried spooling a supercharger with coolant flow. So a prop in line with a large coolant line, as the fluid rushes by the turbine rotates, pulling in air into a compressor.
Cooling the exhaust increases the density & lowers the pressure before the turbo, so it spins less.
Water cooling the exhaust manifold is a good way to reduce the efficiency of the turbo.
Exactly!
Hey Jason,
I've been following your channel for a while and thoroughly admire your ability to communicate complex information to the masses.
I've been recently intrigued by the exhaust cooling in the VW you've been driving and I'm wondering how the pros and cons weigh up against keeping the exhaust headers hot, as seen with exhaust wraps and ceramic coating. Perhaps an idea for your next video?
Keep up the good work!
Regards.
Hi , thanks for the many and informative videos , well done . Could you please make one for the 2019 Hyundai Kona 1.6 turbo ? I don't know if this model is the same in the US as in Australia .
In the trucking world, it's common knowledge, that big diesel truck engines horsepower is limited by the exhaust heat.. 1200 degrees is all any turbo can stand.. in boats, the same engine can produce twice the horsepower, because they use water to cool the exhaust manifold and turbo's...
This would eliminate alot of the turbo heat, and allow you to run a higher power, longer...
"With engines in general you can run a rich air fuel mixture to cool..." Afraid not, this applies to gasoline engines regardless of natural or forced induction, but Diesels are exactly the opposite, regardless of natural or forced induction.
"why would VW do this" Emissions, period. Faster warm up, leaner burn. Other factors are side effects of the emissions goals.
Correct bros....diesles are much easier to tune for performance....its just a matter of leaning it out as much as u can and when you start to see the torque fall down u know u have past a Diesle VE efficiency
@@RobertLutece909 emissions and fuel economy aren't related, at all.
lol
@@RobertLutece909 we're in agreement
Stochiometric ratio is 15 air:1 fuel, ideal is 12:1 to prevent detonation.
I'm surprised that humble mechanic hasn't chimed in and said his piece, hahaha. but great video, Jason! I learned something that I didn't know. 😃
Nice review. Note that the 2.0 EA888 in GTI (230HP) and R (310HP) have the same set-up. R models are already being tuned up to 480HP (HGP Germanny), so the blockcan absorb the thermal load without a problem...
the Honda r18 Engine had this in 06 i believe. just not with turbo.
@
All this could have been done decades ago. Too late. All ICEs are now obsolete.
EVs will take over soon and fast. Hydrogen fuel cells for: trucks, trains, ships, etc.
Over clocks to 5.1GHZ with a 1.45V aha
4.1ghz wirh 1.32 volts from 3.1 with 1.2 volt stock
I thought Vw had used ceramics of some sort to cope with the heat, great to have learned something today
Really interesting concept, and great explanation. I don't know if this is possible, but is there anyway to make the mouse easier to see when you are pointing out the different parts on the engine? I had it on full screen and could barely see it, especially when it was moving quickly.
Hey you gave a pretty good explanation bro, didn't know this till day. Just wanted to know if it's the case with only TSI engines or even the TDI engines come with this feature.
This petrol engine is based on the third generation 1.8T "EA888" which was introduced in 2014 and is used in many modern Audi/VW/Skoda.
Timmey Timm Ok, so I'm guessing the
2.0 TDI doesn't come with it. It's the 2011 TDI engine I'm taking about.
Diesel engines don't need this kind of cooling, at least not for the catalyst/turbo temperature protection part. The exhaust temperatures are much lower compared to gasoline engines. Max ~750 ℃
John Gialampoukas Yeah I get it. Thanks a lot you guys.
would this help with lag as well due to the exhaust gases don't have to travel very far to reach the turbo?
a bit, but main lags are from long intake pipings
lone mazter - could you explain in a little more detail? I'm just really curious about this. I'm an engineer but have never really thought through the dynamics of turbo-lag before.
Large intercoolers/intake manifolds increase turbo lag because the entire volume between the turbo and the valves has to pressurize. Even when the turbo is spinning it takes a few moments to fill up those pipes with air. The turbine side is not designed to have a large pressure difference, it just needs fast moving exhaust gas.
The Ford Flathead V8 has (sortof) been doing this since the '30s with the exhaust going through the cooling jackets in between the cylinders and out the sides of the engine.
They should do this with modern diesels. With the regens exhaust temps get crazy
@Engineering Explained
Question for you, how does the cooler air (loss of kinetic energy) impact the turbine portion of the turbocharger? Doesn't this mean that you have less energy to power the turbo? Why not cool the exhaust gasses between the turbine and the catalytic converter to still be able to run lean without loss of turbo efficiency (or at least enable a larger turbo with more boost)? If you get a chance to answer, I would appreciate it, otherwise, thanks for your videos, I thoroughly enjoy them.
That's what I was thinking. Isn't this design less efficient performance-wise? Or does the cooled air get denser and therefore better to move the turbine?
Anyway, for those of you who are refering this as not being original: I don't know, but I would definitely bet it's not. German engineering is more about picking old, badly explored and before-it's-time ideias from other brands - likely italian or british - and improving then untill reliable and usable.
you lost some, you win some - cooler exhausts mean lower pressure, but also means less heat to intake air
also there is a turbo with changing geometry, so there is no problem to hold pressure constant.
Is it VGT? Does he refer that? I don't think they can lower the temperature that much to use VGT.
No wastegate, and it has actuator - so i'm pretty much sure that this is VGT
In 911 '07 with 3.6 engine they use VGTs
So, as an addendum to my question, I realize that you can do many different things to design for the available exhaust gas power (vgt, smaller compressor), my question was more about if there is a loss of available exhaust power with a water cooled exhaust manifold. I do recognize a significant cost reduction to in-head exhaust water cooling, because there is already cylinder jacket water cooling right there, and the block is cast, so it is much cheaper than some external cooler. Also the small engine may not be able to take more boost than it gets right now, so the loss may be fully acceptable.
Is the 2.0l engine in the GTI and R model also like this? Because that's not a low power motor. In the R it makes 295 horsepower which seems like a lot for only 2 liters of displacement.
Maybe that's why my GTI sounds like it's still working after you shut it off, it must be cycling the coolant through the system.
mookie714 Hmm, I think it's just cooling the engine off. I've noticed the same thing in the 2 liter Passat
Same thing for all 3rd gen ea888 motors, so yes, that includes all mk7 gti's and r's
I have the 2.0t. yes it has the integrated manifold and that sound you hear is the turbo timer. It’s cycling coolant to cool the turbo.
mookie714 yes, it’s most likely coolant flowing through the turbo so it doesn’t heat-soak. many modern vw cars do this, i don’t know about other brands.
Going into mech engineering and this seems so interesting
Looks like the exact same engine thats mounted in my 2016 Polo GTi. Pretty neat technologie they got going on there.
Well, ford flathead V8s had one of the very first "water cooled exhaust"'s, and that didn't turn out too well XD
Tianze Li Yeah but you're also comparing ford to a European manufacturer
Aren't they European enough already?
Tianze Li Yeah but that doesn't mean they reflect the quality of a European car
They don't reflect the quality of American cars either, Chrysler should hold that honor lol XD
It turned out well, they learned not to do it again :D think positive :D
20% better fuel economy, eh? *insert Dieselgate joke here*
the biggest joke about diselgate is, that VW was one of them but not the worst, if I remember correctly citroen got realy cocky and made fun of VW for cheating , two weeks later tests were made and the result was that Citroen was even worse!
I always thought Citroen made some pretty terrible vehicles. VW is at least likeable.
Actually : Renault/Nissan is under investigation. The Fiat/Jeep/AlfaRomeo group too. Porsche was caught red handed with a more advanced cheating device. Mercedes is concerned. Audi, as part of Volkswagen had, naturally, some sort of devices installed.
The dieselgate just shown to us, who is willing to kill us for profit.
Almost all European car manufactures were cought on cheating, Citroen, Peugeot, Renault, Fiat, Opel etc.. Give ma a brake american brands ate Saint. At least .European manufactures make more advanced cars with better milllage...
+doktorbimmer It is a matter of public record how the cheating was discovered. They found it was VW because they just happened to be testing a pair of VWs with another car when they were doing their research. Do you think that West Virginia University in the heart of coal country is part of a global conspiracy to promote electric cars?
And by the way, Mr. Bimmer Doktor, the third car in the test that didn't cheat? A BMW.
Most interesting. Great explanation, thanks.
Please make detail video on 5 to 6 speed transmission, how it works when we start the engine till we start driving
Dieselgate or not, Volkswagen build probably the most advanced engines on the market in terms of power, efficiency and refinement. They spend nearly twice as much on R&D then the second biggest spender in the auto industry Toyota. Seems to show.
No, the manufacturer with the most advanced efficient engine design is Mazda- and there is more to come with the new combustion -ignition Skyactive X.
Guess that's why my grandma drives Toyotas, bruh.
R&D Budgets are kinda misleading, a LOT of it goes into stuff completely unrelated to how a car drives. Your typical mass-production vehicle like a Golf will have development costs far exceeding those of most hypercars (some are cross financed as marketing / research cost).
This is such a neat idea! I knew I still liked VW!
A longer term drawback could be a more uneven heating pattern across the cylinder head casting,increasing the chances of uneven clamping loads being maintained by the cylinder head fixings during and after repeated heat cycles and therefore more chance of gasket failure. Another concern would be the castings actual reaction to far more heat regardless of the cooling jacket in the casting.Remembering that a conventional exhaust manifold is usually quite exposed and with a large external surface area to dissipate heat.we are already replacing the external water jacketed aluminium exhaust manifold/turbo housings on BMW b38 engines because micro cracks in the manifold are causing porosity issues,still cheaper than a complete cylinder head though.
Totally awesome mechanic's instructor!!!
I'm pretty sure Honda has been doing this for a long time already...Thanks for explaining, always wondering why they are doing that.
nbc about honda.
Used to be that European innovation were copied by far-Eastern design. It turned around.
@@jzk3919 ever since toyota and honda got to north american markets id say european cars started playing second fiddle...
@@jzk3919 honda has been doing this since their j30a4 and k24a5. so almost 20 years now.
Best gasoline turbocharged engine ever you will find with great fuel economy, OBS! skip the tsi with timmingchain
Which has the timing chain, the 1.4? Thanks
I've spent my career in the Automotive/Truck Industry for the last 50 years (retired 6 years) as a Mechanic and Sales Engineer. In the last week or so, I have been amazed at the new components I have learned about, i.e. Electrical Superchargers/Internal Exhaust Manifolds/Twin Turbos/Dual Clutch Transmissions/HCCI Engines/Cam-less Engines, Variable Compression Ratio engines etc, unbelievable! It seems that most of these are sadly done by foreign manufactures. It looks like USA Auto manufactures are living in the past!
very interesting videos! thank you!
that wouldn't reduce the volume of exhaust gas going to the turbo? if one of the problems is the temperatures at the catalyst converter then why not cool the down pipe?
It likely will reduce the velocity of the exhaust gases to some degree. This isn't a really high performance engine though, so the gain in efficiency is worth the loss in power.
The cooler air will theoretically be more dense, creating more pressure on the turbo fins I think.
This manifold is still used on high hp builds, I think it’ll be just fine. Plus header tubing is small to begin with. What you lose in mm in exhaust port size you gain in velocity, temps, and spool time aka everything that matters. The 2.0t version is a beast. 18mpg right here hahah
Next time the engine overheats, I think I know where the aluminum head will crack/warp
stilkus dont overheat the engine....
no one wants to overheat their engine.... failures happen, leeks spring and maintenance gets missed. it is an unfortunate reality.
The white smoke will be EPIC.
Exactly. If you're on the highway and lose a radiator hose, by the time you pull off the highway your head will be 500degree and warping
There's nothing really obvious since the engine hasn't proven itself yet. Lots of theoretical advancements have been done only to fail miserably in real life.
Nice explanation of a nuanced process.
Hi bro. How find if some time high pressure injector leak in gold R .
I believe Ford does this on their ST ecoboost engines as well.
yes, same with the new turbo hondas.
a bit sad, a new 1.5L turbo honda does 180HP at 16psi. This VW 1.8L is only 170HP at 19psi :(
There are several factors which affect the output. Having a larger displacement and more boost pressure doesn't mean that it should be more powerful. There are a lot of things that affect the output such as turbo size, mapping etc.
Mr. AMMO they do it on the 2.7 v6 also.
Wine Meer
i know, but needless to say, the turbo installed on the hondas are TD03, ie, very small already and spools up at like 1.5 rpm and full boost by 2k ish rpm.
Except this 1.8L has 20-30 lb/ft of torque more.
let's wait a few years and see what kind of problems/recalls come from this design
Well non from 2020. Also EA888 have now hit 500+ hp on golfs
600hp with the large frame turbocharger from Turbo Technics. Incredible unit.
@@aleksandartan7057 yea
Coolant in exhaust this mainfold must cracked
Castle Bravo sorry for my english. Cold coolant contacts with cold metal mainfold and this with hot exhaust gases. the difference between the mainfold temperature and the exhaust gas always is huge. Even when coolant is hot
Plenty of old school generators and boat engines had water cooled exhaust manifolds.
I had my hands on an Onan with a turboed 460 and water cooled manifolds within the last month.
It's in an office building , almost in a broom closet.
Kinda nice without all that heat radiating everywhere, and super quiet being it was city water cooled, no fan needed.
Being an owner of a 2016 passat 1.8 tsi i had no idea the engine in my car is so tech advanced.
The water cooled manifold is neat.
As far as driving dinamics...the engine is a gem.theres absolutely no turbo lag and when you kick the accelerator my the 3.400 pound passat goes ballistic. It feels like it has much more power than 170 bhp...maybe its because max torque is available at 1.500 rpm.I average close to 40 mpg pure highway and about 28 combined.
I have close to 40.000 miles on the odometer and the only thing ive done to it is change the front rotors and pads and a nice set of michelin tires.
Honestly i dont know what the future has in store for my passat...being that its a pretty complex engine,but looks like most new cars are in the same ballpark as far as comlexity is concerned.
I absolutely love German engineered powertrains. Time to purchase an Alltrack & practice what I preach.
The Germans make great cars but your VISA will whimper when Hans and Franz open the hood to fix something in 80K miles. I've owned 4 VWs and an Audi, trust me on this.
Owwwdi!
Quickly unbecoming a VW-Audi fan... Time to pull those emblems off my toolbox. Shame, they're the only ones too
turbo lag due to the weak piston return springs
Did you really think you was first with that joke? Do you have something new to give here?
What if you retrofitted a cooling system on a standard exhaust manifold? Could you get the same results?
Great cutaway view of the engine. It was pleasing to see a solid Overhead Cam Drive Chain again, and not the toothed rubber Timing Belt. Not sure if you mentioned that (by liquid cooling of the Exhaust Gases) - the exhaust gases will become slightly more dense, to better drive the Turbo and (perhaps) also extend the life of the Turbo Unit.
The Honda engine I'm my Saturn VUE has water cooled exhaust since 2004
I would of upped the ante of the saturn engine before putting a foreign contaminate in.
Do video about Mazda gas engine without spark plugs.
Matsek2 search my channel for "HCCI"
does it need a much greater coolant flow to prevent boiling?
Honda/Acura was the first to come out with this technology on their 1st Gen RDX turbo vehicles.
This isn't going to cause exhaust particulate to condense on the inside of the exhaust?
Next step is to build the turbo into the head itself.
Chris Webb assuming your comment is serious and not just an off-hand joke, do you think there would be benefits to incorporating the turbo into the head? That's quite a packaging problem...
Or have seperate turbos for each cylinder lol.
Robert Johnson The oil feed will be simpler, but, damn, how will they manufacture it?
The same way camshafts go into a head, a long tube, with 4 very small diameter turbine blades that the exhaust blows into and then out an outlet manifold to a cat and exhaust system down stream. If VW can build a complex water cooling jacket into a head with exhaust manifold in it, this should pose no more serious difficulty. The question is, will this be of any benefit?
peejay1954 Thanks. The benefit is that anti-lag will almost disapear. This will be more helpful for diesel engines, as they don't need intercoolers as much and because their turbos have variable geometry already.
Will the steep thermal gradient on startup cause failures elsewhere? Cyl head gasket etc.?
I'd like to see the tooling and process for molding such a complex engine block.... I cant even imagine how to get that geometry
When they SAY 20% they MEAN 3%...
Averaging 36mpg in my 2019 Gli. Plus it warms up in about 90 seconds. This system is all a win in my eyes.
Only averaging 34 in mine, but I do a decent amount of city and I definitely drive it decently hard.
You have to differentiate between special load cases (-20 %) and an average value (- 3 %) over a longer distance.
have to wait and see if VW will honor their warranties when problems arise.
They have been making this engine for like 5 years now and this hasn't been an issue. Add to that the fact the little 1.8 tsi uses a chain and not a timing belt and you can bet these will go for quite a while.
its a problem waiting to happen
Ian Mcdowell lol, you don't work on cars do you? Vw Audi are well known for their chain and tensioner issues
A fascinating video well presented, looks like the turbo will be the main part the aftermarket tuners will focus on plus remapping.
The Honda Insight had a 3 cylinder engine with the exhaust manifold in the head as well. It makes for a great lean burn engine.aftermarket guys have been turbo charging those engines for over a decade. Great to see this is moving to other applications.
too much stress on the head cylinder head, and cooling system. sounds good in a lab but out in the field.
life is what is German engineering Understatement and it will work smooth and fine
Thermostat sticks closed, engine blows up after 30 seconds.
There's a good chance that the ECU would notice that and do something I would think
Thermostat is a fail safe sticks open and throws a code.
When I first saw this kind of Engine manifold when we were packing up Engines at work I had to google what was up with that stuff. Found a very nice scientific paper on that matter. I like that Idea. It's kinda cool.
Would the reduced distance for the exhaust gasses to travel from cylinder to turbine reduce overall turbo lag?
Love the innovation but feels like a service nightmare!
i never liked vw until i drove one for myself. blew me away enough to get myself a 2016 passat
VW is like 80% of the way towards a luxury brand when it comes to perceived quality. They have great sound isolation and materials everywhere. In a class of their own pretty much.
mine did not blew me away, the engine just blew after 40k miles, now its in the shop every other month almost :S
peter foxx
There's Arteon and also Touareg
Mike Mr305 good luck working on it if you keep it past 100k. I'll never own a German car again
Manny Echaluce my Passat just rolled 245k lol I guess bad ones are around though B5.5 Passat wagon love it.
So, in essence, it's just siamesed exhaust ports in the head, routed so they exit together and the turbo can be bolted directly without the need for an external exhaust manifold between head and turbo?
yes, but paired cylinders, 1 and 4, 2 and 3.
New ideas every day . Thanks
1:37 always use protection kids!
I'm in the 50s I own ford almost exclusively 30yr Until a ford dealership told me "did not want my old ford vehicle" So I thought to myself you don't want to buy my old car why would I want to purchase your new vehicle? Their attitude change when I stood up and walk out. I week of research brought me to my local VW dealership, purchased new 2006 Volkswagen rabbit new 2011 Tiguan. Now 2017 Volkswagen. Never had to take a vehicle into the VW dealership for repairs, Oil changes and other routine maintenance yes. Are Volkswagen perfect? probably not but in my humble opinion they do beat Ford. I had a 2000 Ford Taurus. It was in the shop every single month I owned it. Where the warranty ran out, I got rid of it.
Taurus was a sh|t box
Then you didnt make it past 100k miles.. not unless you did the timing belt yourself.. cool story though..
My daughter's 2016 Ford Focus has had 3 automatic transmission failures and it only has 28,000 miles. She gets 38-42mpg on the dash meter average so she's not hot rodding it. That transmission just sucks.
Who Me? It will quickly go down hill after about 50 - 70k miles, that's what VWs and BMW do. My wife's Chevy Tahoe has 8 years on my BMW x3 and 70k more miles yet mine is breaking something every month...
We have a little saying in Europe (not everyone says that, but some do) - never buy I car whose brand starts with an F. This meaning, Ford, Fiat, and french brands :D
Seriously though, all manufacturers have their strong and weak points. And overall reliability, fuel economy and performance quite often vary between different cars of the same model. Even with automation, mass scale production etc. you cannot ensure that all cars will match their specification 100%, neither exceeding it nor missing the target.
Obviously this will usually not be a huge difference, but if you are lucky and get the one that was in 5% of the most reliable ones, and someone gets the one that was in the least reliable ones, your experiences will look incredibly different.
Hi Jason. Can you explain the difference between direct action DOHC and rocker arm DOHC and analyze the advanges for each?
great video and explanation
Unnecessarily Complicated,
but Great Idea tho
It is no more complicated than any technology already present in an engine, just slightly more precisely executed.
20% fuel efficiency ... of course this is Volkswagen so that number might be a bit "optimistic."
efox2001 Actually, if you did more research rather than just the slanted American auto media and their hatred for diesels, your quickly find that Volkswagen (along with most other German car brands) UNDER advertise their numbers in regards to fuel economy, horsepower, and torque.
Proud owner of VW
I have no hatred for diesels but FYI, the Chevy Cruze Eco 1.4 Turbo easily achieved 55mpg
highway, 3200-3300lb vehicle.
Now the lighter/smaller Chevy Sonic is available with the same engine , the difference being the Tune and the Final drive ratio. (Somehow achieves less fuel economy.. hrmm..)
Diesels can easily run leaner than a gas engine, so there is more mpg to be had... Just no manufacturer going after it..
I guess what im saying is.. A lot of these guys could be doing better in the MPG department.
Honda toyota caught scam fuel efficiency numbers...not volkswagen...
Volkswagen didnt just lie, they wrote computer code to cheat emission testing and lied about it. Why yall salty over this well deserved criticism? They have zero credibility now. Its just a fact.
Probably because it's ignorant, since fuel efficiency can be easily tested by anyone.
Do you think it would be possible to create an aftermarket manifold that achieves the same effects? Would it result in overall lower EGTs?
Thanks for the info. I bought a 2018 Passat with the 1.8 and have enjoyed the Improvements with APR tuning. Now I see why APR can’t do a turbo upgrade for stage 3. Even after the tuning I get 36 mpg with 60 mph cruise, and 32 mpg with 78 mph hwy. city driving between stop lights vary.
um isn't the hotter the Exhaust gasses usually better because it biulds more pressure in front of the Turbine that's shy turbos biulds more boost under load because the engine makes more heat. I see this not being in production very long.
TRX VLOGGER colder air denser air per volume. I suppose this helps turbo lag a bit of percentage
TRX VLOGGER lower temperature has a higher pressure with the ae volume
In a sense you are correct. They are removing energy from the exhaust gasses by cooling them before they reach the turbo and so the turbo won't build as much boost. Remember though that they are running a leaner a/f mixture which raises the exhaust gas temperature and then water cooling it, likely to around the same temperature as a conventional engine. While I think you are right in that it may limit peak power, I could also see it giving them more control over EGT and resulting in a less peaky turbo spool.
What alks said, plus, the cooling on the exhaust gasses will also reduce the intake temperatures of the compressed air ( i.e. created by the turbo charger) as the intake air passes through the intake turbine directly adjacent to the exhaust turbine. Therefore.. Colder intake air = more dense and makes more power.
Cooling air WILL NOT increase density - only increasing the amount of gas will do that. What cooling air does is increase the density for a given amount of pressure. Intercoolers help turbos increase density because turbos compress air to a specific pressure, not density.
To bad we can't get a diesel version of this...
WDesign diesel sucks
Jay I really disagree with that statement. Plus the 6.7 PowerStrokes are Watercooled.
What about cooling exhaust gases downstream of turbo, would give TC bigger pressure differential to work with?
Would this mean if using a marine manifold (water runnimg through manifold) on a regular car, you could get gains?