Modular Hybrid Transmission with a One Way Clutch
First Claim
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1. A transmission system having a combustion engine, an electric motor and a transmission, the system comprising:
- a clutch operatively connected between the engine and the motor; and
a one way clutch connected in parallel with the clutch that permits the engine to increase speed with the clutch disengaged until the engine speed matches a motor speed, wherein the engine provides positive torque through the one way clutch to the motor and transmission upon matching the motor speed.
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Abstract
A vehicle transmission system having a combustion engine, an electric motor and a transmission includes a first clutch operatively connected between the engine and the motor and a one way clutch. The one way clutch is connected in parallel with the first clutch that permits the engine to increase speed with the clutch disengaged until the engine speed matches the motor speed. The engine provides positive torque through the one way clutch to the motor and transmission upon matching the motor speed. The first clutch and the one way clutch may be a hybrid rocker one way clutch.
44 Citations
16 Claims
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1. A transmission system having a combustion engine, an electric motor and a transmission, the system comprising:
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a clutch operatively connected between the engine and the motor; and a one way clutch connected in parallel with the clutch that permits the engine to increase speed with the clutch disengaged until the engine speed matches a motor speed, wherein the engine provides positive torque through the one way clutch to the motor and transmission upon matching the motor speed. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A transmission system for a vehicle that has a combustion engine, an electric motor and a transmission connected in series, the transmission system comprising:
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a one way clutch that slips in a first rotational drive direction; and a hybrid one way clutch having selectively shifted rockers is connected in parallel to the one way clutch between the engine and the motor, the rockers are actuated when an engine speed matches a motor speed to shift the rockers from a bidirectional slip condition to a one way slip condition locked in the first rotational drive direction. - View Dependent Claims (8, 9, 10)
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11. A method of operating a transmission system for a vehicle that has a combustion engine, an electric motor and a transmission connected in series, a first clutch operatively connected between the engine and the motor, and a one way clutch connected in parallel with the first clutch, the method comprising:
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initiating an engine start operation; disengaging the first clutch to disconnect the engine from the electric motor; and engaging the one way clutch when an engine speed matches a motor speed. - View Dependent Claims (12, 13, 14, 15, 16)
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Specification