Internal Combustion Engines
If one cylinder of a diesel engine receives more fuel than the others, then for that cylinder the

Piston rings would stick into piston grooves
Engine starts overheating
Scavenging occurs
Exhaust will be smoky

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Internal Combustion Engines
The fuel valve in a four stroke cycle diesel engine

Opens at 15° before top dead center and closes at 20° after top dead center
Opens at 15° after top dead center and closes at 20° before bottom dead center
Opens at top dead center and closes at bottom dead center
May open and close anywhere

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