商用车AMT中间轴制动器性能试验

Performance Test of Countershaft Brake System for Commercial Vehicle AMT

商用车电控机械式自动变速器AMT升档时,通过中间轴制动器来同步待啮合的齿轮,以保证换档的平顺性,因而中间轴制动器的性能直接关系到AMT的换档品质。本文设计台架试验,对AMT中间轴制动器的制动力、密封性、一致性、寿命等性能进行测试。试验模拟实车升档情况,以16档商用车自动变速器为对象,采用TTC200控制器,协调控制离合器和制动器,同时采用CANalyser实时监测制动器性能,最终提出制动器的改进方案。试验表明,该中间轴制动器可以满足自动变速器的使用需求。

In order to achieve shift comfort, automatic mechanical transmissions for commercial vehicles use a counter shaft brake system to synchronize the target gears when upshifting. Therefore the AMT shift quality depends largely on the performance of the countershaft brake system. A testbed for the countershaft brake system was built to analyze the braking force, sealing, consistency, durability etc. During the test, TTC200, a type of control unit which supports the rapid prototy ping, coordinately controled the clutch and brake system, simulating the actual upshift process. Meanwhile, CANalyser monitored the behavior of the brake system. Finally, improvements for brake system were proposed. In conclusion, the countershaft brake system could meet the requirements of AMT.