【摘 要】
：
Due to torque interruption and clutch friction of Automated Manual Transmissions(AMT)during gear shift, the shift quality is not as good as other kinds of transmissions, so reducing shift time becomes
【机 构】
：
State Key Laboratory of Automotive Simulation and Control, Jilin University(Campus NanLing)
【出 处】
：
第19届亚太汽车工程年会暨2017中国汽车工程学会年会
论文部分内容阅读
Due to torque interruption and clutch friction of Automated Manual Transmissions(AMT)during gear shift, the shift quality is not as good as other kinds of transmissions, so reducing shift time becomes an essential issue to improve the shift quality.Dur- ing the gear shift process, new gear speed needs to be regulated as gear ratio changes.In this paper, the research topic is gear shift process of an AMT of electric vehicles, the influence of the speed difference between new gear and synchronizer on gear shift time is studied.Powertrain model of the electric vehicles with AMT is built in ADAMS and several simulations are conducted.Simulation results demonstrate that by controlling the speed difference between new gear and synchronizer in a positive small range from 0rpm to+10rpm with the shift force at 200N, shifting synchronizer can be engaged in a short time.In addition, results also show that within small speed difference range, the existence of synchronizer ring has little effect on gear shift performance, which illustrates that the structure of AMT on electric vehicles can be simplified.
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