Engine efficiency | Wikipedia audio article

This is an audio version of the Wikipedia Article:


00:00:43 1 Mathematical definition
00:02:44 2 Compression ratio
00:06:22 3 Friction
00:07:31 4 Oxygen
00:10:00 5 Internal combustion engines
00:10:10 5.1 Gasoline (petrol) engines
00:14:05 5.2 Diesel engines
00:15:22 5.3 Gas turbine
00:17:22 6 External combustion engines
00:17:33 6.1 Steam engine
00:17:49 6.1.1 Piston engine
00:24:41 6.1.2 Steam turbine
00:25:55 6.2 Stirling engines
00:26:58 7 See also



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SUMMARY
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Engine efficiency of thermal engines is the relationship between the total energy contained in the fuel, and the amount of energy used to perform useful work. There are two classifications of thermal engines-

Internal combustion (gasoline, diesel and gas turbine-Brayton cycle engines) and
External combustion engines (steam piston, steam turbine, and the Stirling cycle engine).Each of these engines has thermal efficiency characteristics that are unique to it.
Engine efficiency, transmission design, and tire design all contribute to a vehicle's fuel efficiency.