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US 10,532,648 B2Granted
Power transmission device for hybrid vehicle
AssigneeKabushiki Kaisha F.C.C.
InventorTatsuyuki Ohashi
Life of this patent
Estimating the term…
Abstract
A power transmission device for a hybrid vehicle with a first clutch (1a) and a second clutch (1b). The first clutch (1a) is capable of transmitting or cutting off driving power of an engine (E) to driving wheels (D). The second clutch (1b) is capable of transmitting or cutting off power of a motor (M) to the driving wheels (D). The power transmission device is capable of appropriately operating the first clutch (1a) and the second clutch (1b) in accordance with driving conditions of the vehicle. When the engine (E) is started by transmitting power from the motor (M) to the engine (E), via the first clutch (1a) and the second clutch (1b), the power transmission device slip-controls the first clutch (1a) and the second clutch (1b).
Claims7
A power transmission device for a hybrid vehicle, comprising:
- a first clutch disposed in a drivetrain extending from an engine installed in the vehicle to a driving wheel, the first clutch is capable of transmitting or cutting off driving power of the engine to the driving wheel;
- a second clutch disposed in the drivetrain extending from a motor installed in the vehicle to the driving wheel, the second clutch is capable of transmitting or cutting off driving power of the motor to the driving wheel;
- the power transmission device is capable of appropriately operating the first clutch and the second clutch in accordance with driving conditions of the vehicle;
- and
- when the engine is started by transmitting power from the motor to the engine, via the first clutch and the second clutch, the power transmission device slip-controls the first clutch and the second clutch so that a torque calculated by subtracting a torque transmitted by the first clutch from a torque transmitted by the second clutch becomes a predetermined torque.
2 more elements
A power transmission device for a hybrid vehicle, comprising:
- a first clutch disposed in a drivetrain extending from an engine installed in the vehicle to a driving wheel, the first clutch is capable of transmitting or cutting off driving power of the engine to the driving wheel;
- a second clutch disposed in the drivetrain extending from a motor installed in the vehicle to the driving wheel, the second clutch is capable of transmitting or cutting off driving power of the motor to the driving wheel;
- the power transmission device is capable of appropriately operating the first clutch and the second clutch in accordance with driving conditions of the vehicle;
- and
- when the engine is started by transmitting power from the motor to the engine, via the first clutch and the second clutch, the power transmission device slip-controls the first clutch and the second clutch so as to increase a rotation speed of the motor before increasing a rotation speed of the engine.
2 more elements
A power transmission device for a hybrid vehicle, comprising:
- a first clutch disposed in a drivetrain extending from an engine installed in the vehicle to a driving wheel, the first clutch is capable of transmitting or cutting off driving power of the engine to the driving wheel and the first clutch has a gap to prevent contact of a friction material in a disengaged state;
- a second clutch disposed in the drivetrain extending from a motor installed in the vehicle to the driving wheel, the second clutch is capable of transmitting or cutting off driving power of the motor to the driving wheel;
- the power transmission device is capable of appropriately operating the first clutch and the second clutch in accordance with driving conditions of the vehicle;
- and
- when the engine is started by transmitting power from the motor to the engine, via the first clutch and the second clutch, the power transmission device slip-controls the first clutch and the second clutch and the power clutch transmission device cause the first clutch to be in an ineffective-stroke-reduced state before increasing a rotation speed of the engine, the ineffective-stroke-reduced state is a state where the friction material of the first clutch is in contact without the gap and a transmitted torque is small.
2 more elements
A power transmission device for a hybrid vehicle, comprising:
- a first clutch disposed in a drivetrain extending from an engine installed in the vehicle to a driving wheel, the first clutch is capable of transmitting or cutting off driving power of the engine to the driving wheel;
- a second clutch disposed in the drivetrain extending from a motor installed in the vehicle to the driving wheel, the second clutch is capable of transmitting or cutting off driving power of the motor to the driving wheel;
- the power transmission device is capable of appropriately operating the first clutch and the second clutch in accordance with driving conditions of the vehicle;
- and
- when the engine is started by transmitting power from the motor to the engine, via the first clutch and the second clutch, the power transmission device slip-controls the first clutch and the second clutch and the power transmission device causes the first clutch to be in an ineffective-stroke-reduced state when a rotation speed of the engine becomes higher than or equal to a self-start rotation speed, the ineffective-stroke-reduced state is a state where the friction material of the first clutch is in contact without the gap and a transmitted torque is small.
2 more elements
A power transmission device for a hybrid vehicle, comprising:
- a first clutch disposed in a drivetrain extending from an engine installed in the vehicle to a driving wheel, the first clutch is capable of transmitting or cutting off driving power of the engine to the driving wheel;
- a second clutch disposed in the drivetrain extending from a motor installed in the vehicle to the driving wheel, the second clutch is capable of transmitting or cutting off driving power of the motor to the driving wheel;
- the power transmission device is capable of appropriately operating the first clutch and the second clutch in accordance with driving conditions of the vehicle;
- and
- when the engine is started by transmitting power from the motor to the engine, via the first clutch and the second clutch, the power transmission device slip-controls the first clutch and the second clutch while slip-controlling the first clutch, the power transmission device causes fuel to be supplied to the engine in a state where the engine rotates and where a rotation speed of the engine is lower than a self-start rotation speed at which the engine can be started by restarting supply of the fuel.
2 more elements
A power transmission device for a hybrid vehicle, comprising:
- a first clutch disposed in a drivetrain extending from an engine installed in the vehicle to a driving wheel, the first clutch is capable of transmitting or cutting off driving power of the engine to the driving wheel;
- a second clutch disposed in the drivetrain extending from a motor installed in the vehicle to the driving wheel, the second clutch is capable of transmitting or cutting off driving power of the motor to the driving wheel;
- the power transmission device is capable of appropriately operating the first clutch and the second clutch in accordance with driving conditions of the vehicle;
- and
- when the engine is started by transmitting power from the motor to the engine, via the first clutch and the second clutch, the power transmission device slip-controls the first clutch and the second clutch;
- and
- when switching to a drive mode using only the engine after the engine has been started, the power transmission device disengages the second clutch to cause the motor to perform regeneration of rotation energy after a differential rotation speed of the first clutch becomes lower than or equal to a predetermined value.
4 more elements
Dependencies are inferred from the claim text.