The Modeling And Simulation Of Synchronizer For Manual Transmission

Synchronizer is an important component of the process of the manual transmission. The shifting portability, smoothness, and other major performance of the manual transmission have a significant impact with synchronizer, and it can reduce the gear shifting force on shift lever, the shifting shock and the drivers fatigue. A good synchronizer should have good synchronization performance and locking performance, with a smaller shifting force to obtain synchronization time as small as possible, and to ensure input and output of synchronization does not engagement when the sleeve and synchro ring do not meet the same angular velocity.At present, the transmission of professional design software applications broader, more world applications mainly ROMAX and MASTA, transmission gears, gear tooth profile, shaft and bearing so you can easily these two software design and verification. While both programs can be added synchronization, but they established model represents a shift synchronizer, and can not express the synchronizer performance, such as the synchronization time and shifting force. This article will mainly build the virtual prototype model of synchronizer with UG and ADAMS, analysis the main parameters on the impact of the performance of synchronizer, and give the measures of improving its performance.This article divides the working process of the synchronizer into two processes base on understanding deeply. They are synchronization and locking process, and analysis of these two processes, deduce the mathematical expression of these two processes and the main factors of the impact of synchronization for the establishment of the synchronizer virtual prototype model. When creating the synchronizer virtual prototype model, firstly, the UG model of synchronizer components assembled import into ADAMS, and then calculates the actual output of the input synchronous initial conditions given synchronizer model. Virtual prototype model of the synchronizer simulation mainly observes the synchronization time and the double bump, and to compare the result of the different friction cone semi-cone angle and the spline gear locking angle simulation, and obtains the relationship of the synchronization time and the double bump with the different friction cone semi-cone angle and the spline gear locking angle. Then we give the effective measures for reducing synchronization time and the double bump. Use of virtual prototyping technology to the actual physical prototype produced synchronizer can be predicted prior to its performance, improve design efficiency and shorten the design cycle and reduce design costs, so it has good economic and social benefits.