Control system for lock-up clutch
AssigneeToyota Jidosha Kabushiki Kaisha
InventorAtsushi Tabata
Life of this patent
Estimating the term…
Abstract
In a vehicle provided with an engine and a motor as interchangeable drive sources, a torque converter attached to the vehicle transmission is controlled so as to capitalize upon the advantages of the motor when the motor is used as the drive source. A map to be used in determining whether to engage the lock-up clutch is selected according to whether the drive source is the engine, the engine plus motor generator, or motor generator (steps 100, 110, 120).
Claims14
A vehicle lock-up clutch control system that controls transmission of drive force between drive wheels on one side and an engine that operates by fuel combustion and a motor on the other side, for a vehicle that uses the engine and the motor as drive sources, the lock-up clutch control system comprising:
- a torque transmission device with a lock-up clutch that is arranged between the drive wheels on one side and the engine and motor on the other side;
- and
- a lock-up clutch controller that controls an engagement state of the lock-up clutch;
- wherein the lock-up controller changes content of the lock-up clutch engagement control according to an operational state of the drive sources.
A vehicle lock-up clutch control system that controls transmission of drive force between drive wheels on one side and an engine that operates by fuel combustion and a motor on the other side, for a vehicle that uses the engine and the motor as drive sources, the lock-up clutch control system comprising:
- a transmission provided between the driving wheels on one side and the engine and motor on the other side;
- a torque transmission with a lock-up clutch provided between the driving wheels on one side and the engine and motor on the other side;
- and a lock-up clutch controller that controls an engagement state of the lock-up clutch;
- wherein the lock-up clutch controller changes content of the lock-up clutch engagement control according to an operational state of the drive sources at the time of speed changing by the transmission.
A vehicle lock-up clutch control system in which at least a motor generator is provided as a drive source, the lock-up clutch control system controlling transmission of drive force between drive wheels and the motor generator, the lock-up clutch control system comprising:
- a torque transmission with a lock-up clutch that is arranged between the drive wheels and the motor generator, whereby it is possible to apply a regenerative braking torque to the drive wheels by causing the motor generator to function as an electrical generator;
- and
- a lock-up clutch controller that controls an operational state of the lock-up clutch;
- wherein the motor generator is caused to function as an electrical generator during deceleration of the vehicle;
- and
- wherein the lock-up clutch controller controls an engagement state of the lock-up clutch in order to adjust a deceleration degree during deceleration of the vehicle.
Dependencies are inferred from the claim text.