Looking at GM's Direct Injection Engine Technology

GM's direct injection engine technology increases fuel economy and power while reducing emissions. Watch as Global Chief Engineer Chris Meagher explains how it works and talks about how this technology will soon be in ten percent of GM's vehicles worldwide.

Category:

Autos & Vehicles

Tags:

• GM
• General Motors
• fuel
• savings
• direct
• injection
• engine
• engineering
• chevrolet
• chevy
• camaro
• cobalt
• buick
• enclave
• cadillac
• cts
• equinox
• economy

[xilix]

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

[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.

[merlecasey13]

I want this video on my GX18 unit.

[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

[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

[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.

[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

[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.

[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.

[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.