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    • 4. 发明授权
    • Shift control apparatus for automatic transmission
    • 用于自动变速器的换档控制装置
    • US08142320B2
    • 2012-03-27
    • US12254481
    • 2008-10-20
    • Takahiro MorimotoHaruki SatoMasatake IchikawaHiroshi Tsutsui
    • Takahiro MorimotoHaruki SatoMasatake IchikawaHiroshi Tsutsui
    • F16H31/00
    • F16H61/061F16H2061/0444
    • A shift control apparatus that disconnects and connects respective pairs of friction engagement elements during downshift to a speed spaced apart by two or more steps through an intermediate shift speed. A shift controller controls a hydraulic pressure of a second shift release element by feedback control, and in accordance with the increase in the torque capacity of the second shift release element, also controls the torque capacity of a first shift engagement element so as to be sufficiently higher than the amount of change in the torque capacity of the second shift release element. The occurrence of adverse consequences in which a shift shock is generated is effectively suppressed because a sufficient reaction force cannot be ensured during engagement switching due to insufficient torque capacity of the first shift engagement element, and since the second shift release element cannot be appropriately feedback-controlled, difficulty in control of rotation change results.
    • 一种变速控制装置,其在降档期间将各对摩擦接合元件分离并连接到通过中间换档速度的两个或多个步骤间隔开的速度。 换档控制器通过反馈控制来控制第二换档释放元件的液压,并且根据第二换档释放元件的扭矩容量的增加,也可以将第一换档接合元件的扭矩能力充分控制 高于第二换挡释放元件的扭矩容量的变化量。 由于由于第一换档接合元件的转矩容量不足而在接合切换期间不能确保足够的反作用力,因此有效地抑制了产生换档冲击的不利后果的发生,并且由于第二换档释放元件不能被适当地反馈, 受控,难以控制旋转变化的结果。