单项选择题
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
Diesel engine air start valve timing is controlled by（）...
单项选择题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
The timing of diesel engine air starting valves is cont...
单项选择题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
The minimum fuel oil delivery pressure required for die...
单项选择题The minimum fuel oil delivery pressure required for diesel engine injection depends primarily on the（）
A.degree of cylinder air turbulence B.firing pressure in the engine C.quality of fuel to be injected D.duration of the ignition delay period
