| 摘要 |
<P>PROBLEM TO BE SOLVED: To start a torque phase in synchronization with an increase of transmission input torque in reducing torque reducing shock in the torque phase with an increase of the transmission input torque. <P>SOLUTION: From the shift start time t1, a releasing-side clutch H&LR/C is released when actual pressure Po following an operating pressure command value Po_o reduces, and a fastening-side clutch D/C is fastened when actual pressure Pc (a broken line) following an operating pressure command value Pc_o (a solid line) increases. A torque reduction caused in a torque phase upon upshifting from 1 to 2 when the engagement of the H&LR/C and the D/C is changed is canceled by an increase of motor torque Tm at t3 to keep transmission output torque To at a value To1 as shown by the solid line t1, thereby reducing shift shock. When the Pc shifts to α1 or α2, e.g., and the To becomes β1 or β2, pre-charge pressure of the Pc_o is corrected to γ1 or γ2 so that the α1 or α2 has broken line characteristics, to start fastening of the D/C in synchronization with increase time t3 of the motor torque Tm. <P>COPYRIGHT: (C)2012,JPO&INPIT |
