To provide a hybrid drive capable of suitably making a hybrid vehicle perform retreat traveling.
A hybrid drive mechanism 10A has a first transmission 400 with a plurality of gears between an output rotating shaft 380 of a motor generator MG1 and a counter shaft 700, and a second transmission 500 with a plurality of gears between an input shaft 370 connected to an output rotating shaft of a motor generator MG2 and the counter shaft 700; the transmissions can each be connected at one of the gears with the counter shaft 700 respectively by a first clutch mechanism 430 and a second clutch mechanism 530. In HV-mode drive control, for example, an ECU 100 discriminates whether or not each motor generator is in an abnormal condition; if at least one of the motor generators is in an abnormal condition, the ECU reselects a drive mode from selectable drive modes that are achieved by combinations of the plurality of gears, to make the hybrid vehicle 10 perform retreat traveling.
SUZUKI MAKOTO
FUKUMURA MITSUMASA
Koji Yamamoto
Satoshi Nakamura