Power transmission unit for vehicle
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsHiroto Hashimoto, Tomohito Ono, Hiroaki Kimura
Life of this patent
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Abstract
A power transmission unit that can prevent an entrance of excessive torque to the powertrain is provided. The power transmission unit includes a transmission that transmits torque between an engine and drive wheels; a locking device that selectively halts a rotation of an output shaft of the engine; a transmission case holding a first motor, a second motor, the transmission, and the locking device; a first torque limiter disposed between the engine and the locking device to restrict torque transmitted between the drive wheels and the engine; and a second torque limiter held in the transmission case to restrict torque transmitted between the drive wheels and the locking device.
Claims7
A power transmission unit for a vehicle, comprising:
- a prime mover including a main prime mover, a first motor and a second motor;
- a transmission that transmits torque between the main prime mover and drive wheels and between the first motor and the drive wheels;
- a locking device that selectively halts a rotation of an output shaft of the main prime mover by bringing a rotary member into engagement to a stationary member;
- a transmission case holding the first motor, the second motor, the transmission, and the locking device;
- a first torque limiter that is disposed between the main prime mover and the locking device to restrict torque transmitted between the drive wheels and the main prime mover;
- and
- a second torque limiter that is held in the transmission case to restrict torque transmitted between the drive wheels and the locking device.
Dependencies are inferred from the claim text.