Vehicle drive device and vehicle drive method
AssigneesNissan Motor Co., Ltd., JATCO Ltd
InventorsKouichi Mori, Shigeru Tomoda
Life of this patent
Estimating the term…
Abstract
A torque assist using a motor generator mechanically coupled to an output shaft of an engine via a belt is prohibited during a lock-up transition from a state where a lock-up clutch is released to a state where the lock-up clutch is engaged, and the torque assist using the motor generator is permitted when a condition for the execution of the torque assist is satisfied except during the lock-up transition.
Claims6
A vehicle drive device, comprising:
- a motor generator mechanically coupled to an output shaft of an engine via a belt;
- a torque converter arranged between the engine and a transmission and including a lock-up clutch for connecting or disconnecting the engine and the transmission;
- an engaged state detecting unit configured to detect an engaged state of the lock-up clutch;
- a motor generator control unit configured to cause the motor generator to generate a predetermined assist torque to torque assist the engine;
- and
- a torque assist permitting/prohibiting unit configured to prohibit a torque assist by the motor generator control unit when the lock-up clutch is released and permit the torque assist by the motor generator control unit if a condition for executing the torque assist is satisfied when the lock-up clutch is engaged.
A vehicle drive method for executing a torque assist of the engine using a motor generator mechanically coupled to an output shaft of an engine via a belt, comprising
- detecting an engaged state of a lock-up clutch in a torque converter arranged between the engine and a transmission and including the lock-up clutch for connecting or disconnecting the engine and the transmission;
- prohibiting the torque assist by the motor generator when the lock-up clutch is released and permitting the torque assist by the motor generator if a condition for executing the torque assist is satisfied when the lock-up clutch is engaged;
- and
- causing the motor generator to generate a predetermined assist torque to torque assist the engine when the torque assist by the motor generator is permitted.
A vehicle drive device, comprising:
- a motor generator mechanically coupled to an output shaft of an engine via a belt;
- a torque converter arranged between the engine and a transmission and including a lock-up clutch for connecting or disconnecting the engine and the transmission;
- engaged state detecting means for detecting an engaged state of the lock-up clutch;
- motor generator control means for causing the motor generator to generate a predetermined assist torque to torque assist the engine;
- and
- torque assist permitting/prohibiting means for prohibiting a torque assist by the motor generator control means when the lock-up clutch is released and permitting the torque assist by the motor generator control means if a condition for executing the torque assist is satisfied when the lock-up clutch is engaged.
Dependencies are inferred from the claim text.