单向离合器(简称单向器)是起动机的关键部件。它的作用:在起动过程中可靠地传递起动机发出的扭矩给发动机的曲轴和发动机被发动后藉其单向作用保护起动机电枢不致因超越引起高速而损坏。因此单向器之性能优劣决定着起动机的可靠性。所以各汽车电机厂均对单向器的改进工作予以十分重视。 One-way clutch (referred to as the one-way device) is the starter of the key components. Its role: During the starting process to reliably transmit the torque emitted by the starter to the engine crankshaft and the engine is activated by one-way action to protect the starter armature will not cause damage caused by over the high speed. Therefore, the performance of the unidirectional determines the reliability of the starter. Therefore, the motor vehicle factory on the improvement of the one-way work to be paid great attention.