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发明授权
CN101135371B 用于动力传动系的换档冲击减小装置 有权

用于动力传动系的换档冲击减小装置
摘要：
本发明公开一种用于动力传动系的换档冲击减小装置，所述动力传动系具有发动机和自动变速器，所述自动变速器包括在换高速档时接合的接合侧摩擦元件，所述换档冲击减小装置包括：执行扭矩下降的控制部分，其在换高速档过程中执行所述发动机的扭矩下降，所述扭矩下降在其中所述自动变速器的齿轮比从换档前齿轮比改变为换档后齿轮比的惯性阶段开始之前开始；以及增大上升梯度的控制部分，其使执行所述发动机的所述扭矩下降时向换高速档时接合的接合侧摩擦元件供给的工作油压的上升梯度比不执行所述发动机的所述扭矩下降时大，所述扭矩下降在所述惯性阶段开始之前开始。
摘要（英）：

A shift shock reducing apparatus for a power train having an engine (1) and an automatic transmission (2) having a frictional element that is to be engaged at upshift, comprising a control section that executes, during upshift, a torque down of the engine (1) that starts before the start of an inertia phase in which a gear ratio of the transmission (2) is changing from a before-shift gear ratio toan after-shift gear ratio, and a control section that makes larger a rising gradient of working oil pressure that is supplied to the frictional element to be engaged at upshift when the torque down ofthe engine (1) that starts before the start of the inertia phase is executed than that when the torque down is not executed.

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