2006-08-09 05:14:06 · 4 answers · asked by pervaiz elahi bukh soomro 1 in Science & Mathematics ➔ Engineering
Mostly low 30s. Higher compression engines do a bit better, highest compression engines (diesels) do the best, in the mid to high 30's.
Note that those thermal efficiencies are for high load use. Running at 5-10% of maximum (like most cars do most of the time) and efficiencies are in the 20's or less.
Add a turbo to a diesel and run at optimal rpm and you can touch on 40% thermal efficiency.
2006-08-09 11:09:09 · answer #1 · answered by Anonymous · 0⤊ 0⤋
42
2006-08-09 12:19:21 · answer #2 · answered by bitterbitter1 1 · 0⤊ 0⤋
Mostly 30 to 40%.
2006-08-09 12:29:23 · answer #3 · answered by cooler 2 · 0⤊ 0⤋
Don't know, because most people are interested in the power output from the engine, not the heat output.
2006-08-09 13:15:26 · answer #4 · answered by Jeffrey S 6 · 0⤊ 0⤋