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Redpoint,
Engine efficiency is different from combustion efficiency. We stand to gain incredible efficiency increase by speeding up the burn and massing pressure on the piston between 15 degrees and 30 degrees after TDC. I have force vector calculations to support this claim.
Essentially, Combustion efficiency converts to Mechanical efficiency and reduces thermal losses since less fuel needs to be burned.
Instead of massing pressure on the piston during the critical crank angle degrees, fuel is burned in the catcons at 1800 degrees Farenheit in the upstream and downstream catcons. Seems like lots of waste to me that could be reduced.
I posted this earlier:....
According to Fueleconomy.gov website here are the stats that seem correct:
Petrol vehicles are 12% to 30% efficient,
Engine losses: 68% to 72% (thermal losses 58% to 62%),
Wind resistance: 8% to 12%,
Rolling resistance: 4% to 7%,
Braking: 4% to 7%,
So that would make engines overall 28% to 32% thermally efficient.
Combustion losses: 3%,
Friction losses: 3%
Discounting pumping efficiencies, we can improve engines theoretically by 64% to 68% (adding thermal, combustion and friction losses).
Compare that to 8% to 12% wind resistance losses.
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