发动机曲轴一般由主轴颈、连杆轴颈、曲柄、平衡块、前端和后端等组成。曲轴

发动机曲轴一般由主轴颈、连杆轴颈、曲柄、平衡块、前端和后端等组成。曲轴的性能在很大程度上影响着汽车发动机的可靠性与寿命,它与连杆配合将作用在活塞上的气体压力变动力，传给底盘的传动机构，使汽车运动。因此，曲轴应有足够的抗弯曲、抗扭转的疲劳强度和刚度；轴颈应有足够大的承压表面和耐磨性；曲轴的质量应尽量小；对各轴颈的润滑应该充分。

发动机曲轴一般由主轴颈、连杆轴颈、曲柄、平衡块、前端和后端等组成。 曲轴的性能在很大程度上影响着汽车发动机的可靠性与寿命,它与连杆配合将作用在活塞上的气体压力变动力，传给底盘的传动机构，使汽车运动。 因此，曲轴应有足够的抗弯曲、抗扭转的疲劳强度和刚度；轴颈应有足够大的承压表面和耐磨性；曲轴的质量应尽量小；对各轴颈的润滑应该充分。

Engine crankshaft is generally composed of main journal, connecting rod journal, crank, balance weight, front end and rear end. The performance of crankshaft affects the reliability and life of automobile engine to a great extent. It changes the power of gas pressure acting on the piston to the transmission mechanism of chassis to make the automobile move. Therefore, the crankshaft should have enough anti bending and anti torsion fatigue strength and rigidity; the journal should have enough bearing surface and wear resistance; the quality of the crankshaft should be as small as possible; the lubrication of each journal should be sufficient.<br>