On May 8, 5:45=A0pm, "Mortimer" <m...@[EMAIL PROTECTED]
> wrote:
> How much does the effect of the turbo vary with engine speed and
therefore=
> exhaust gas flow? Presumably the faster the engine is going, the higher
th=
e
> inlet pressure of air that the turbo delivers to the inlet-stroke
> cylinder(s) and so the greater the amount of air and therefore the
greater=
> the amount of fuel that can be burned efficiently before you get partial
> combustion.
the effect of the turbo varies essentially with the amount of *fuel*
being burned, because the fuel comes into the engine as a liquid
(atomized, but still) and the combustion products are all gases. So
the volume of gas going through the turbo is dependent not only on
engine speed, displacement, and VE (with no fuel at all being
injected, this would determine the amount of gas passing over the
exhaust turbine) but also the amount of fuel burned and the resultant
temperature (remember, pv=3Dnrt)
so basically, unless you did well in thermodynamics, trying to figure
it out exactly will make your head hurt :) (I think I got a B or C in
all of the thermo cl***** that I took, and now I need another cup of
coffee...)
nate
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