|
with saturated steam in the intake pumping losses due to vacuum work over time head towards zero. 4 stroke gasoline pumping losses are in the order of 15 percent.
2/3 of the energy of combustion is lost to heat. fully 1/3 of the energy is lost to the water jacket.
heat transfer is partly due to temperature differentials, materials, thicknesses, and insulating factors.
we are trying to compare two cases. One case is traditional 4 stroke, very part throttle, minor horsepower.
the other case is the same air, fuel, with saturated steam on intake stroke, compression stroke, power stroke, and exhaust storke.
intake stroke should be easier, as less absolute pressure making it easier to suck.
compression stroke should be about the same as steam turns to water with increasing pressure.
combustion occurs, and as it occurs, btus turn liquid to steam, meaining less absolute temperature, but really wondering if the pressure is actually less.
as power stroke occurs, will liquid to turn to steam maintaining pressure beyond the ideal gas theories?
W
as you stated, if you have the temp, the volume is insignifcant as to pressure. so maybe we have more pressure longer down the power stroke?
as someone else stated, should be pretty easy to test, but what EXACTLY do you measure? do you measure bsfc? is that a fair way to do it?
|