Quote:
Originally Posted by arcosine
So you are saying that more air in the engine the better the mpg, well then why not have a big engine that sucks a lot of air in and that should get better mpg than a small engine that sucks less air in at a given output. I still don't follow the logic, since at partial throttle there is more excess air in a Diesel and less fuel but yet the sbfc is not better.
In the report that you site, they don't mention changing the injection timing for optimum torque at the different temperatures tested.
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Why do you think they make and mount intercoolers om diesel engines?
To cool the intake air!
The reason for the WAI on a gas/petrol car is to make the throttle plate open more to lover intake resistance. Diesels donset have throttelplates, but rund wide open all the time, so as cold air as possible and as little restriction in the air intake on a diesel is the best both for FE and HP.