Quote:
Originally Posted by Vwbeamer
You correct, that EGR can help FE on a throttled engine, but it's only purpose on a diesel is to reduce Nox
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Not completely right, its MAIN purpose is to reduce Nox.
In SAE paper 2005-01-3837 "The Influence of Charge Dilution and Injection Timing on Low-Temperature Diesel Combustion and Emissions" maximum fuel conversion efficiency has been found near 14% O2 concentration, achieved through EGR. Although the paper deals mostly with emissions, there is a small section on efficiency.
http://engine.kaist.ac.kr/pdf/SAE2005-01-3837.pdf