Quote:
Originally Posted by NeilBlanchard
Back to another point someone mentioned earlier: I think that heating the gasoline before injecting it would have a strong benefit. This is how a lot of efficiency is gained with oil fired furnaces, and vaporizing the gasoline (as opposed to having droplets) is key to gaining efficiency.
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As a part of a research project years ago...liquid gasoline was heated prior to being introduced to the float bowl of a dyno test engine; the results were "interesting" ( to say the least); when the hotter gasoline reached the main jet area, the engine suddenly stumbled...lost RPM, and ultimately died. The reason? The gasoline did indeed vaporize more...and, as such, created an overly-rich A/F ratio. With no lamda sensor / ECU to alter timing and fuel flow, this carbed basic engine could not sustain a normal cycle of events.
Would a modern emission engine perform differently? It would seem so...even though the ranges of the sensors might be overwhelmed. Interesting question.... But, you are correct in assuming partial vaporization of the gasoline charge is the reason for incomplete combustion. Some say the efficiency of gasoline combustion is ~98%. I do not believe this.