單項(xiàng)選擇題

The longer the ignition delay period occurs in a diesel engine, the （）.

A.less fuel will enter the cylinder
B.lower will be cylinder compression temperatures
C.more complete will be fuel combustion
D.more rapid will be the rise in combustion pressure

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單項(xiàng)選擇題

Poor combustion in a diesel engine can be caused by （）.

A.high compression pressure
B.low intake air temperature
C.low exhaust pressure
D.high scavenge air pressure

單項(xiàng)選擇題

High firing pressures and a low exhaust temperature in a diesel engine may result from （）.

A.decreased piston to cylinder head clearance
B.increased exhaust system back pressure
C.early fuel injection timing
D.low scavenge air temperature

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The longer the ignition delay period occurs in a diesel engine, the （）.

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Poor combustion in a diesel engine can be caused by （）.

High firing pressures and a low exhaust temperature in a diesel engine may result from （）.