Index / Tools & Machines / Gasoline Engine
Tools & Machines
Gasoline Engine
4-stroke Otto cycle · 1876
Intake, compression, power, exhaust — four strokes of a piston per one explosion of fuel. Overhead camshafts time the valves; an electronic injector meters the fuel; a spark plug lights the mixture on cue.
Key specifications
Cycle
4-stroke Otto (1876)
Compression
10 : 1 – 14 : 1
Power
60 – 400 hp
Thermal efficiency
~30 – 40%
Sheet 007 · Plate 1 of 1 · 1:1 infographic
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