SteinarN wrote:Higher compression ratio and more air/higher intake manifold pressure gives a higher obtainable efficiency.
Denny wrote:The mystery to me is that this idea seems so basic, its just a mimic of diesel technology, so why has it not been applied to gasoline engines before? ..
TommyJefferson wrote:SteinarN wrote:Higher compression ratio and more air/higher intake manifold pressure gives a higher obtainable efficiency.
Interesting summary. Thanks.
Denny wrote:
The mystery to me is that this idea seems so basic, its just a mimic of diesel technology, so why has it not been applied to gasoline engines before?
But, kudos to GM all the same, maybe the public will get some payback for the retooling bailout.
frankthetank wrote:They could've went one step further and just made a 4 cylinder diesel.
The EcoBoost engines, which run on regular unleaded fuel, work by injecting highly pressurized fuel (yellow in illustration) directly into each cylinder instead of vaporizing and mixing it with air (blue) in an intake port. Direct injection, used by many diesel engines and by some competitors in a variety of gasoline engines, permits the fuel to be used more efficiently.
By combining that technology with turbocharging -- in which exhaust gases (red) are used to power a turbine that compresses air going into the intake, increasing engine output by boosting the amount of air in the air-fuel mix -- –the EcoBoost engine delivers far more power and fuel economy than a conventional gas engine.
Ford says it will couple the EcoBoost technology with other features including electronic power-assisted steering, lightweight frame and body materials, six-speed transmissions and improved aerodynamics.
kanman wrote:Huh? GDI is so 1997.
I can't believe this is being Marketed by US car manufacturers as anything remotely new. Mitsubishi were the first ('97 Carisma) but by 2003 even Ford introduced a GDI offering in Europe (1.8 Mondeo).
Are you guys still trundling round with live axles, drum brakes and recirculating ball steering?
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