Discuss designing-method of transmission synchronizer

This paper introduces the working principle of transmission synchronizer, lists the designing formula of transmission synchronizer, certitudes the designing method or range of the designing formula´s parameters, and sets up the designing principle of transmission synchronizer. Currently, the synchronizer has been widely used in mechanical gear transmission. Due to using it, the performance of the manual-transmission has been greatly improved. It not only makes gear shift more portable without impact, but also improved the average expectancy life of the transmission and the automobile transmission system. Moreover, it improves the automobile´s power and fuel economy. The change of the operational method reduces driver´s fatigue and increases the driver´s sense of security and comfort. For the reasons above, the manufacturers in domestic production of automotive transmissions all use the synchronizer structure ^{[1] [3] [4] [5]}.