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发明公开
CN104728424A DCT车辆中的换档控制方法 有权

DCT车辆中的换档控制方法
摘要：
本发明公开了一种DCT车辆中的换档控制方法。具有双离合器变速器的车辆中的换档控制方法可以包括：确定动力关闭降档是否开始以及扭矩切换是否开始；确定车辆是否已经进入不平地形；在车辆进入不平地形之前计算并存储接合输入轴的速度改变率；计算接合离合器的目标传输扭矩，以及以一定的量来逐渐增加接合离合器的传输扭矩直到到达接合离合器的目标传输扭矩；控制接合离合器的目标传输扭矩为维持直到滑动率到达参考值；以及通过以接合离合器逐渐增加的扭矩量来逐渐减小接合离合器的传输扭矩，完成动力关闭降档。
摘要（英）：

A shift control method in a vehicle having a dual clutch transmission may include determining whether or not power-off downshifting is started and whether or not torque handover is started, determining whether or not the vehicle has entered a rough terrain, calculating and storing a speed change rate of an engaging input shaft right before the vehicle enters the rough terrain, calculating a target transfer torque of an engaging clutch, and gradually increasing a transfer torque of the engaging clutch by an amount until arriving at the target transfer torque of the engaging clutch, controlling the target transfer torque of the engaging clutch to be maintained until a slip rate arrives at a reference value, and completing the power-off downshifting by gradually reducing the transfer torque of the engaging clutch by the amount of torque that the engaging clutch was gradually increased.

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