单项选择题
On most diesel engines, the governor controls the output speed by （）.
A.controlling the amount of fuel injected into the cylinders B.varying the speed of the turbocharger C.adjusting the compression ratio D.changing the timing of the fuel injection camshaft
单项选择题 Which of the following devices is common to both mechanical and hydraulic governors?（）
单项选择题 Which term describes piston pins having bearing surfaces in both the piston bosses and connecting rod eye?（）
单项选择题 The longer the ignition delay period occurs in a diesel engine, the （）.
