Control of a dry, dual-clutch transmission during an engine restart of a hybrid electric vehicle
AssigneeFord Global Technologies, LLC
InventorsIhab S. Soliman, Ryan A. McGee
Life of this patent
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Abstract
A method for controlling an engine restart in a hybrid electric powertrain, including the steps of stopping the engine, using an electric power source and an electro-mechanical actuator connected to the source to engage a gear and stroke to zero torque capacity a dry clutch of a dual-clutch transmission, initiating an automatic engine restart, and increasing the torque capacity of the clutch to a desired torque capacity during the engine restart.
Claims18
A method for controlling an engine restart in a hybrid electric powertrain, comprising the steps of:
- (a) stopping the engine;
- (b) using an electric power source and an electro-mechanical actuator connected to the source to engage a gear and stroke a dry clutch of a dual-clutch transmission to zero torque capacity;
- (c) initiating an automatic engine restart;
- (d) increasing the torque capacity of the clutch to a desired torque capacity.
A method for controlling an engine restart in a hybrid electric powertrain, comprising the steps of:
- (a) automatically stopping the engine;
- (b) using an electric power source and an electro-mechanical actuator connected to the source to engage a launch gear and a next gear and to stroke to zero torque capacity first and second clutches of a dry-clutch transmission;
- (c) initiating an automatic engine restart;
- (d) increasing the torque capacity of the first clutch to a desired torque capacity.
A hybrid electric powertrain, comprising:
- an engine;
- a dry dual-clutch transmission including two clutches and first and second gears;
- an electro-mechanical actuator for actuating the clutches and engaging the gears;
- and
- a controller configured to stop the engine, engage a gear and stroke the first clutch to zero torque capacity using the electro-mechanical actuator, initiate an automatic engine restart, and increase the torque capacity of the clutch to a desired torque capacity.
Dependencies are inferred from the claim text.