Looking at GM's Direct Injection Engine Technology

[merlecasey13]

I want this video on my GX18 unit.

[XxBertFacexX]

From what I've researched about direct injection, it uses a 40:1 air fuel ratio verus 14.7:1 with port fuel injection. Definitely explains the better gas mileage, however that's got to up the Oxides of nitrogen emissions, which I've also read they've compensated for with specially designed catalytic converters. My only question is It's been rumored that DI engines have more trouble with carbon buildup, any opinions on that?

[RIEKSONE]

they are going to add this to the next generation of OHV v8s

i cant wait

[M16503]

The first car to have direct injection was a 1940 Tucker torpedo the reason why is beacous it had a helicopter engine in the torpedo becous it was fast reliable fuel efficient and cheep not many people know the story of Tucker in short explainnation he was a auto maker in Detroit who had revolutionary designs so the big 3 shut him down for more info watch the movie Tucker a man and his dream

[matafdo123]

Direct Injection has been used in diesel engines for years and years. Its not new. There were just waiting to use it for PR. These engines could of been produced some time ago. This is just the car companys holding back technology, so they can make more money off the people.

[thedudefromthewoods]

how is the fuel pressurized? i am familiar with diesel injection systems, but those rely on the lubricity of diesel fuel. gasoline does not have that lubricity, does anyone know what type of pumps or unit injectors this uses? every injection system i can think of has very tight tolerances in the needle valves and plungers.

[ollonsvin]

@thedudefromthewoods The pressute is not that high as a diesel engine, just about 100bar so the stress on the material is not that high.

This is old tecj thue. Multi-air is the best at the moment

[sangolt88]

DI gasoline and turbochargers should be put in to law. Every vehicle will have better fuel economy and less emissions, and yet better performance.

[switchgrassfuel]

I might be willing to invest in a direct injection vehicle if it is flex fuel and high compression or forced induction. I use E85 in my car and would never go back to gas. but E85 works better with high compression engines. that is why if GM hasn't built one of their smaller cars to take advantage of ethanol's 105 octane by the time i am ready to trade i am buying a Subiru WRX STI and convert it myself. I have owned 7 American cars, i am sick of them making their biggest vehicles flex fuel.

[mojoe10k]

Great technology. The performance of the cobalt ss is nothing special though. The good ole ohv 3800 will give you the same economy with a hell of a lot more torque. I think we have yet to see the real potential of direct injection.

[dadigitechman]

It's about time

[mike6413]

How is the "intake charge" being cooled?

[sweetbounty]

its cool as fuck...

[retetikker]

I hate gm, they fucked opel and saab! :(

[WaiWu]

People! all the fuel economy efficient crap is just BS that they throw at you for sales....Even the hybrid harms the environment more than it does any good....

[drtyfknmouth]

@WaiWu Not true. A new Porsche 911 TT can be driven in a city that has an air pollution problem (L.A., for instance) and the exhaust coming out of the pipes is actually LESS toxic than the air that went into the engine. So how can that be harmful to the environment? That actually sounds like its doing some good for the environment, would you disagree with that? And you can look this up if you don't believe I'm telling you the truth about it. It isn't a joke.

[WaiWu]

@drtyfknmouth You are talking about Porsche, and not many people own them...I'm talking about hybrid and fuel efficiency coming from big company like Ford, Toyota, etc...Not saying that in the long run they will not produce something good, it's just for now the technology is barely working right

[drtyfknmouth]

@WaiWu I totally agree with you there. Its just hype thats selling automobiles to the tree hugger elite & praying on the image conscious. If you can find it on Google sometime, you should check out the letter that new owners of the Prius got from the factory. It basically says that even though you REALLY aren't helping the environment by driving a Prius, they wanted to thank you for spending the extra $10k on a car that raises social awareness about the state of the ecology. What a fucking joke.

[WaiWu]

@drtyfknmouth A fuking joke indeed...

[jaretkady]

he says new as in it is newly offered..

[davidajgp]

funny that americans are so far behind on technology

[grometsc]

@davidajgp So what other manufacture is "ahead" of its time right now? I do believe GM has more DI engines on the market than most other manufactures combined. In fact some other manufactures are using GM GDI engines. What new technology should they work on? Honestly what needs reworked are the emissions laws in the US that would allow GDI to improve MPG more, by allowing lean burn modes (AFR higher than 14.7:1 while @ cruise) which would net better MPG, but increases NOx emissions

[intiferino]

A DI is realy powerfull engine, but you need Super 98 actan gasoline and a 3 way catalysis to cleas the Nox emissione, Co and HmCn because this engine burns the gasoline in higher temperature. But has more power. DI tecnology is not new, but the tecnology to clean the emission ist new.. so in gemany, to most sport car have DI

[rich0585]

Ummm GM... You do know Mitsubishi has been using Direct Injection on their 3.2 DI Diesel since 2000?

[intiferino]

@rich0585 haha diesel use allways direct injetction brother and not just mitsubishi We talk here about a gasoline direct injection! diesel and gasoline are very diferent engines...

[rich0585]

@intiferino

No, all diesels are not Direct Injection. Most older diesels are in fact common rail injection. And aside from compression and the ignition source gas and diesel engines are the same.

[intiferino]

@rich0585 Common rail injection is a "new" tecnology from FIAT actually and not old! common rail is the last diesel tecnology! gas and diesel are diferent engines. I would like to see an gas engine that works the same than a diesel. so tell me which gas engine does work the same than a Diesel?

[rich0585]

@intiferino

I am sorry, I meant Mechanical or Indirect injection is "old" Not common rail . Now whats this about differences in gas and diesels? How about the LF9 350 diesel? Its a indirect injection diesel that was commonly switched back to gas for higher horsepower applications, or the customer just hated the diesel. Also, look up both Mitsubishi and Toyota, they have alot of engine platforms that are both diesel and gas.

Also learn2type

[ITBOILSMYBLOOD]

Too bad a lot of the direct injected engines have higher gearing that ends up eliminating any potential fuel economy gains the car would have. Fuel economy has sucked for the last 15 years and has gotten worse for the last 5.

[ooChiTownoo]

The best engines are Nissan which are fuel efficient and powerful.. GTR, 370Z are prime examples of V6 engines that offer supreme power..

[wilkinskid1]

im pretty sure that the Saturn division was working on a direct injection system. obviously not too different from this, but at significantly higher fuel pressures. thus increasing power and efficiency. then i just lost track of it on the internet. has anyone else heard about this?

[fightingisfortheweak]

@wilkinskid1 well theres no point now seeing as the saturn department has been dropped.

[Motorfordtoyota]

Cool.

[FeralTurtle]

You people should learn to listen better. They never said Direct Injection is new, nor that it gives the Cobalt SS 260 hp. He said Direct Injection is new technology that GM is using, and that it helps the 2.0L turbo ecotec engine make 260HP. BMW and GM both started using Direct Injection in their mainstream cars at the same time, so bitch at BMW too...

[Bamchucknorris]

@FeralTurtle at least they didn't make an entire film advertising it like its going to save the earth lol

[rich0585]

@FeralTurtle

Proof he indeed did say that its new.

0:10

0:10

0:10

0:10

0:10

0:10

0:10

[FeralTurtle]

@rich0585

You have to listen... I'll repeat... He did not say the technology is NEW. He said it is a new technology that they are using... As in they are no longer using their old technology anymore... they are using new technology.... they've used port injection for years and years... so if you apply direct injection, it is then, new technology for them that they are using... no one is arguing that direct injection is NEW.

[rich0585]

@FeralTurtle

I know, I am just being a dick.

[FeralTurtle]

@rich0585 No worries...  Make sure you stroke it once and a while..

[Brendonbosy]

Direct injection doesn't give the Cobalt SS 260 HP, its turbocharger does. That's decades old technology GM.

[cassowaryind]

My new engine technology to be released this year makes this and all conventional engines totally obsolete, We are looking at 800 miles to the US gallon and 300hp from 3,5 litre V6 able to run on any fuel..... Prototype in production now.. Watch this space..

[Brendonbosy]

Oh yeah, and just last week I invented way to fold space-time and travel faster than the speed of light...

[mikeswierczek]

It's 30 miles per gallon on a 260 horsepower engine, using US gallons (not the larger Imperial gallon), us gasoline (the top octane fuel available at US pumps is equivalent to the lowest octane fuel available in Europe) and the revised, lower US fuel economy rating system instituted in 2007.

And while the technology is 80 years old, no automaker - European or not - was mass producing it on a large scale five years ago.

[c00smeen]

2010 more cars with direct injection??30 mpg with a 4 cylinder engine?...that's AMAZING!I'm speechless!now that is technology and innovation...

WTF??? Is this guy serious?are you f**n kidding me?HOW ABOUT 80 MPG THAT WE GOT IN EUROPE now for several years?no wondering your auto industry is 6 feet under... Or this video is 30 YEARS old !?!?

[83ls]

@c00smeen

You obviously don't understand some things.

First, Imperial Gallons you know and what Americans know aren't the same. 80mpg you get is about 65 mpg in USA. Typical American travels 20,000 miles per year. To travel that much, you need a decent car. Those tin can you call cars are golf carts here. American lawn mowers make more power than your cars.

[c00smeen]

@83ls

I was talking about efficiency first not power ( of course that if u have a big engine u have more power don't matter the injection system), and the fact that this injection system is old, there are newer systems more efficient...and u don't know how much we have to travel in europe...just because we don't have to cross an entire continent to see our relatives doesn't mean that we only go grocery shopping in a car and come back home...

[c00smeen]

@83ls

...and more power doesn't mean better...a decent car is a QUALITY car with a quality and reliable engine not a piece of shit with a big engine...

I own a bmw 320i e46, a 2001 model and it has 753,000 miles on board and it broke down 3 times in 9 years (I'm not going to sell it soon that I can tell u)...the majority of u ''travelling-americans'' don't even know how to regularly service a car, change it's fluids and so on...don't blame the car man...blame the driver...

[ollonsvin]

New technologie, hahahahah it´s been around for loong time,

30mpg, hahahahah

No wondering GM is bankrupt!!!

[GeneralG1810]

LOL just throw a spark plug in a diesel donk and your off

[xilix]

Cool new technology? DI was developed over 80 years ago! The PR guys at GM are fuckin morons.

[83ls]

@xilix

Mitsubishi was the first manufacturer that started putting these engines into production cars back in late 90s. Not very reliable either.

[fishaholic2012]

@xilix thats so true my fuckin evinrude outboard has direct injection and its from 2003 and they have been making direct injection engines since 98' or 99'

[BriggsMower]

@xilix i recon its all shit

[Motorfordtoyota]

@xilix Cool new tecnology for GM. These are some of the first GM engine to use it. Never did he say it was a new Tecnology. And did you know for America, GM was the first to use Fuel injection in the first place. Called the Ram Jet v8. Look it up. GM knows what they are doing, and they are just now showing that.

[heathfiedler]

@xilix true it might had been but no one ever bothered to use it. but they need to do something different but oh well im not an expert on this so it just my opinion

[v12tommy]

@xilix The Japanese makes did the same thing with overhead camshafts in the 1980s. They made it sound like the best thing since sliced bread, yet pushrod engines are a newer technology than overhead cams. The first pushrod, or overhead valve engine, was not invented until the 1930s (Chevrolet invented it actually) but there were overhead cam engines much earlier than that. The DOHC Offenhauser Indy engine that dominated in the 1980s was invented in 1919 as an 8 cylinder engine.

[klesmer]

@v12tommy You are close,sort of. Both systems have been around since the beginning , Chevy had a overhead valve V8 in 1916 that was a pushrod engine as well as some of Cadillac'a V-12'S and V-16's. It was about a 50/50 mix between overhead cams and pushrods. Aircraft engines of the era were mostly overhead cam designs. The Curtiss OX-5 was one of the earliest and it was a pushrod motor. Some of the early stuff was quite advanced.

[robertkurt2]

Why only use them in 10% of their vehicles? Why not use them in ALL their vehicles?

[Stevenhiggles]

maybe cause its expensive and they are trying to keep cost down.

[robertkurt2]

Or possibly the oil companies don't want too many good fuel efficient engines on the road.

Better engines means more money in our pockets and less in theirs and they don't like that.

[Stevenhiggles]

greedy towel headed basterds...

[robertkurt2]

Ha ha ha ha ha..

Thanks I needed a good chuckle

Peace.

[c00smeen]

the only fuel efficient engines are the ones under 2.0L(120 somethin' ci)It's either power or economy.you can't have them both...

[THEinspectigator]

the guy said it didnt add much cost to it though o_O

[yahbidge]

1:23 doubt it, you wont be making any new cars in 2010

[AOAWHATSUP]

yeah GM wont be around by then

[dayglowgreendoor]

Use "ethanol direct injection" as a supplement to the gasoline engine. It'll revolutionize the automobile engine.

[emforty2]

liar you didnt a Swedish invented direct injection in 1925

[kaija24]

is it really new? i have it on my 1997 mitsubishi challenger/montero sport/nativa.... it goes by all these names but is called challenger in my country. its called GDI (gasoline direct injection) and its been around for quite a while

[jstrawse]

It will be a shame when those american engineers all end up working for Honda and Toyota. Remember what JFK said what you can do for your country. well you could buy an American Car.

[bstunna101]

really cool old technology....you guys just now catching up...

[TK572]

Didn't really explain how it works, other than the animation, it just gave examples of its benifits, and what cars have it and will have it.

[ltethan649]

most diesels have been di for some time now (20 years). basically the fuel injector is inside the combustion chamber for better fuel control.

[regould22]

All diesels have fuel injection and always have. Because diesels inject the fuel at the top of the compression stroke where the fuel spontaneously combusts. That's why diesels don't need spark plugs.

But I don't see how this is different from other fuel injection systems for gas cars.

[ltethan649]

yes fuel injection but not direct older diesels use pre chambers. and in di the only reason it is injected later is for better control of the timing and mix

[hugol10725]

its actually before TDC