單項(xiàng)選擇題

Why is the ring belt narrower in diameter than the skirt of a piston designed for a diesel engine?（）

A.To allow for greater expansion due to higher operating temperature
B.To seal the cylinder against leakage of combustion gases
C.To provide an additional surface for oil cooling
D.To provide an additional strength for the crown and lower structure

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單項(xiàng)選擇題

The effective pump stroke of an individual port-and-helix fuel injection pump is determined by the （）

A.fuel delivery pressure
B.pump plunger diameter
C.plunger control rack position
D.total pump stroke

單項(xiàng)選擇題

The upper section of a piston is called the （）

A.land
B.skirt
C.crown
D.plate

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Why is the ring belt narrower in diameter than the skirt of a piston designed for a diesel engine?（）

你可能感興趣的試題

The effective pump stroke of an individual port-and-helix fuel injection pump is determined by the （）

The upper section of a piston is called the （）