In a two-stroke engine that uses a camshaft, each valve is opened _____ for every rotation of the crankshaft; in these engines, the camshaft rotates at the same speed as the crankshaft.In a four-stroke engine, the valves are opened only half as often; thus, _____ of the crankshaft occur for each rotation of the camshaft. A: once ... two full rotations B: twice ...two full rotations C: once ... one full rotation D: twice ... one full rotation

camshaft

If there is only one camshaft in each cylinder head, it is called the single overhead camshaft (SOHC) as shown in Fig.2-8a．

camshaft position sensor ______

In a four-stroke engines the camshaft rotates at _____.

That is, the camshaft rotates at a half speed of the crankshaft．

The end of the ______ is operated by an eccentric on the camshaft. A: crankshaft B: rocker arm C: connecting rod D: spark plug

The camshaft is used to open and close the valves with the motion of the pistons.

camshaft() A: 曲轴 B: 凸轮轴 C: 推杆 D: 气门

If a four-stroke/cycle diesel engine is running at 1550 RPM， the speed of the camshaft will be（）.