| 摘要 |
<P>PROBLEM TO BE SOLVED: To eliminate the engagement shock of a one-way clutch in performing speed change through the one-way clutch to a transmission status or mode switching in the transmission status. <P>SOLUTION: According to the deterioration of accelerator opening APO, a 4→5 upshift command is issued at t1, and an HEV→EV mode switching command is issued at t2. A direct clutch D/C is released at t1 with a command pressure tPc2=0. The first clutch is released by a command pressure tPc1=maximum value at t4 after the lapse of TM1 hours from t2, and an engine is stopped (Ne=0) at t5 after the lapse of TM2 hours from t2. The revolving speed of a motor is controlled so that the revolving speed Nm of the motor can be reduced to the specific revolving speed near the revolving speed posterior to speed change within a target shift time from t5, and the torque of the motor is controlled so that a one-way clutch can be smoothly engaged at t8 when Nm=specific revolving speed is satisfied and afterwards. A front brake Fr/B is joined with a command pressure tPc=maximum value at t8, and 4→5 upshift is performed. <P>COPYRIGHT: (C)2008,JPO&INPIT |
