單項(xiàng)選擇題

During the valve overlap period, the exhaust pressure of a turbochargers, four-stroke/cycle diesel engine must be less than the intake manifold pressure to ensure （）

A.effective cylinder scavenging and cooling
B.constant pressure from the turbochargers
C.cooler operation of the exhaust system
D.effective constant pressure for turbocharger operation

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單項(xiàng)選擇題

Which of the listed diesel engine systems is likely to create the problem of a cylinder regularly misfiring?（）

A.Lubrication
B.Cooling
C.Fuel
D.Electric ignition

單項(xiàng)選擇題

When the normal compression ratio of a diesel engine is not very high, misfiring at light loads may be caused by （）

A.overloading the engine
B.low exhaust valve lift
C.excessive cylinder cooling
D.insufficient mechanical clearance

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During the valve overlap period, the exhaust pressure of a turbochargers, four-stroke/cycle diesel engine must be less than the intake manifold pressure to ensure （）

你可能感興趣的試題

Which of the listed diesel engine systems is likely to create the problem of a cylinder regularly misfiring?（）

When the normal compression ratio of a diesel engine is not very high, misfiring at light loads may be caused by （）

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