POWER TRANSMISSION DEVICE

摘要

The present invention is provided with: a planetary gear mechanism; a first rotating machine connected to the sun gear of the planetary gear mechanism; a one-way clutch and mechanism connected to the carrier of the planetary gear mechanism; a drive wheel and second rotating machine connected to the ring gear of the planetary gear mechanism; and a parking device connected to the ring gear. When there has been a command to release the parking device (step S10-Y), the first rotating machine is rotated in the forward direction (step S30) and the parking device is released (step S40). If there has not been a command to release the parking device while on a climbing road (step S20-Y), the first rotating machine may be rotated in the forward direction to release the parking device.