Yuchai YC6A Series, Operation & Maintenance Manual, Page: 45 / 99

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3.3 曲柄连杆机构
Crank-connecting Rod Mechanism
曲柄连杆机构是发动机的主要工作机构。其作用是把活塞的往复直线运动变为曲轴的旋
转运动，把燃气作用在活塞上的力转变成曲轴的扭矩并对外输出作功。曲柄连杆机构包括活
塞连杆组和曲轴飞轮组。活塞连杆组的零件见图
2-9
。
Crank-connecting rod mechanism is one of main working mechanisms of the engine. It is
used to turn reciprocating linear motion of the piston into rotating motion of the crankshaft, i.e.
turn the force applied by the fuel gas in piston into the torque of the crankshaft which can be
output to do work. Crank-connecting rod mechanism includes piston-connecting rod
assembly and crankshaft-flywheel assembly. See Fig 9 for the parts in piston-connecting rod