发明申请
US20090170650A1 SHIFT CONTROL APPARATUS FOR AUTOMATIC TRANSMISSION 有权
自动变速箱换档控制装置

SHIFT CONTROL APPARATUS FOR AUTOMATIC TRANSMISSION
摘要:
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.
公开/授权文献
信息查询
0/0