Something, something no traction.
Something, something no traction.
mguar wrote:thatsnowinnebago wrote: BTDC timing? Heresy! Diesels are a strange breed. Problem is, thanks to that article I'm starting to want a old diesel Dodge. I don't even like DodgesWait for the direct injection diesels due out.. Unlike currant injection which squirts fuel at the intake valve, direct injection engines squirt fuel at the sweet spot in the combustion chamber. That way a minimum of fuel remains on and in the intake valve. very little is wasted on hitting the cylinder walls etc.. Fuel mileage is significantly improved..
Sounds like GM salesmen before the duramax. It's been a while since any of the pickup diesels were indirect injected with a precombustion chamber.
As for the original topic, most turbo diesels run some form of waste gate, so changing the tune or spring pressures can increase boost.
That will put more air into the cylinder allowing more fuel and therefore more power, even at low throttle the engine fills the cylinder with as much air as possible, so more boost will provide better thermodynamic efficiency (therefore better mpg).
mguar wrote:thatsnowinnebago wrote: BTDC timing? Heresy! Diesels are a strange breed. Problem is, thanks to that article I'm starting to want a old diesel Dodge. I don't even like DodgesWait for the direct injection diesels due out.. Unlike currant injection which squirts fuel at the intake valve, direct injection engines squirt fuel at the sweet spot in the combustion chamber. That way a minimum of fuel remains on and in the intake valve. very little is wasted on hitting the cylinder walls etc.. Fuel mileage is significantly improved..
Huh? Common Rail Direct injection has been in widespread use for at least a decade now.
mguar wrote: Wait for the direct injection diesels due out.. Unlike currant injection which squirts fuel at the intake valve, direct injection engines squirt fuel at the sweet spot in the combustion chamber. That way a minimum of fuel remains on and in the intake valve. very little is wasted on hitting the cylinder walls etc.. Fuel mileage is significantly improved..
What the hell are you talking about? Diesels have been direct injected for years... The main difference recently is they keep increasing the fuel pressure for better spray and number of pulses per stroke.
Ian F wrote:mguar wrote: Wait for the direct injection diesels due out.. Unlike currant injection which squirts fuel at the intake valve, direct injection engines squirt fuel at the sweet spot in the combustion chamber. That way a minimum of fuel remains on and in the intake valve. very little is wasted on hitting the cylinder walls etc.. Fuel mileage is significantly improved..What the hell are you talking about? Diesels have been direct injected for years... The main difference recently is they keep increasing the fuel pressure for better spray and number of pulses per stroke.
I'm with Ian, no diesel has had the fuel injected at the intake valve or in the intake tract, either in a prechamber like old school diesels or directly into the cylinder. You want the air compressed so it gets hot and then the fuel is sprayed into that hot air, igniting the fuel.
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