Gear shift control system of hybrid vehicle

摘要

In a hybrid-drive electric vehicle, upon request of gear shifting of a transmission ( 2 ), a clutch ( 3 ) is first disconnected and the transmission ( 2 ) is set to a neutral position. The rotating electric generator 4 is then operated in a motor mode or a power generating mode so that a rotational speed of an input shaft of the transmission ( 2 ) reaches a region of a synchronizing rotational speed in accordance with a requested gear position. When the rotational speed of the input shaft of the transmission ( 2 ) reaches the region of the synchronizing rotational speed, the gear position of the transmission ( 2 ) is changed over from the neutral position to the requested gear position. Thus the rotation synchronizing time for the gear shifting in the transmission ( 2 ) is reduced, making it possible to perform the gear shifting for a short period of time.