Quote:
Originally Posted by mwebb
EGR does NOT increase combustion temperature OR combustion pressure
EGR when active reduces BOTH combustion temperature and pressure
EGR does kinda sorta reduce compression ratio when active ( although many will say it does not ) by reducing the amount of air fuel mixture that can be drawn into the combustion chamber
by dilution with an INert gas - exhaust -
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Sorry, I probably should've said "pre-ignition temperature". EGR increases the mass of gas in the cylinder, which increases the pressure and temperature before ignition occurs. That's not saying that it helps combustion at all, or that it increases combustion temperature, etc. Well, the charge certainly starts at a higher temperature but since it's diluted it ends at a lower temperature most likely.