Quote:
Originally Posted by ecomodded
This report on turbo diesel motors cannot stress enough how important it is to have intake air temperatures as close to the coolant temperature as possible. It may well be that in our diesel motors that great variation in coolant and intake air temperatures is hurting efficiency.
have a look at this informative and interesting
( if your a tech junkie) read on intake temperature of a turbo diesel.
http://www.mandieselturbo.de/files/n.../5510-0005.pdf |
from the article
"The density of the air will be high when
the ship is operating in arctic conditions
with a low turbocharger air intake
temperature. As a result, the scavenge
air pressure, the compression pressure
and the maximum firing pressure will be
high.
In order to prevent excessive pressures
under such ambient air temperature
conditions, the turbocharger air inlet
temperature should be kept somewhat
higher than the ambient air temperature
(by preheating, if possible)."
Nothing to do with efficiency just engine longevity.
Also as noted in the article some ships use exhaust gasses for steam production and a drop in EGT caused by cold air intake could reduce steam production below the minimum required level. This really is applicable to a car.