SOFT SHIFT SYSTEM AND METHOD

摘要

The invention relates to a system and method for the soft shift of a transmission connecting a power source and a driven device. When it is desired to change gear ratios in the transmission, the transmission is caused to enter a torque converter mode from a lockup mode. The engine speed is adjusted according to a signal representative of the speed of the transmission output shaft. Once the gear ratio has been changed, the transmission is caused to enter a lockup mode from the torque converter mode.