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單項選擇題

Which of the engine components listed increases air charge density and helps to improve engine operating efficiency?（）

A.Intake manifold
B.Water-cooled exhaust system
C.After-cooler
D.Exhaust diffuser

單項選擇題

A diesel engine will lose power if fuel injection occurs too early because the （）

A.fuel will not be properly atomized in the cylinder
B.ignition will be delayed due to low ignition temperature
C.maximum fuel expansion will occur on the compression stroke
D.fuel will ignite before top dead center

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In a diesel engine, exhaust valves open before the intake ports are uncovered to （） Ⅰ.reduce pumping losses Ⅱ.reduce back pressure

你可能感興趣的試題

Which of the engine components listed increases air charge density and helps to improve engine operating efficiency?（）

A diesel engine will lose power if fuel injection occurs too early because the （）

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In a diesel engine, exhaust valves open before the intake ports are uncovered to （）
Ⅰ.reduce pumping losses
Ⅱ.reduce back pressure