單項(xiàng)選擇題

In the cylinder of a diesel engine fuel is ignited by the（）

A.spark from a plug in the pre-combustion chamber
B.electrical discharge from the distributor
C.heat of compression within the cylinder
D.heat from the fuel injection nozzle

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單項(xiàng)選擇題

Diesel engine air start valve timing is controlled by（）

A.engine operating speed
B.an air manifold
C.a hydraulic distributor
D.individual cams and valve gear

單項(xiàng)選擇題

The timing of diesel engine air starting valves is controlled by（）

A.the air start valve timing gears and rods
B.a cylinder check valve
C.individual cams and valve gear
D.an air manifold poppet valve