对于工程机械计算机仿真模型试验、系统设计参数优化、传动系统的零件寿命的评估尤其是车辆换挡平顺性的研究具有一定的实用意义。
All is directed toward computer Simulation model testing optimizing system design parameters and evaluating power train component capability and especially vehicle shift-feel.
同时，向多挡位化发展是自动变速器的重要发展趋势之一，挡位多使变速器具有更大的速比范围和更细密的挡位之间的速比分配，进而改善汽车的动力性、燃油经济性及换挡平顺性。
At the same time, multiple gear is one of the important directions, it has more wide-ranging and more elaborate transmission ratio scope, improving Power performance, fuel economy and rideperformance.
为了满足平顺性，建立了以冲击度为约束条件的起步与换挡控制规律，并对试验结果进行了分析。
In order to meet ride comfort, establish the start and shift control regularity that takes shock extent as constraint condition, and analyze the test results.
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