Method and device for controlling engine clutch of hybrid vehicle
AssigneesHyundai Motor Company, Kia Motors Corporation
InventorDo Hee Kim
Life of this patent
Estimating the term…
Abstract
A method and device for controlling an engine clutch of a hybrid vehicle are provided. The method includes setting a target speed of an engine to change a driving mode of the hybrid vehicle from an EV mode to an HEV mode and operating a HSG to adjust an engine speed to reach the target speed. An engine clutch that connects the engine with a driving motor or disconnects the engine from the driving motor is engaged to start when the speed of the engine is maintained at the target speed. A kiss point generated when the engine clutch is in a slip state is detected to learn the kiss point of the engine clutch and an output of the engine is increased based on a driver required torque when the speed of the engine and a speed of the driving motor are synchronized after the kiss point is learned.
Claims9
A method for controlling an engine clutch of a hybrid vehicle, comprising:
- setting, by a controller, a target speed of an engine to change a driving mode of the hybrid vehicle from an electric vehicle (EV) mode to a hybrid electric vehicle (HEV) mode;
- operating, by the controller, a hybrid starter-generator (HSG) to adjust a speed of the engine to follow the target speed;
- engaging, by the controller, an engine clutch that connects the engine with a driving motor or disconnects the engine from the driving motor to start when the speed of the engine is maintained at the target speed;
- detecting, by the controller, a kiss point generated when the engine clutch is in a slip state to learn the kiss point of the engine clutch;
- and
- increasing, by the controller, an output of the engine based on a torque required by a driver of the hybrid vehicle when the speed of the engine and a speed of the driving motor are synchronized after the kiss point is learned,
- wherein when the driving mode is changed from the EV mode to the HEV mode, engagement and learning of the engine clutch are simultaneously performed.
A device for controlling an engine clutch of a hybrid vehicle, comprising:
- an engine clutch configured to connect an engine with a driving motor or disconnect the engine from the driving motor;
- and
- a controller configured to set a target speed of the engine to change a driving mode of the hybrid vehicle from an electric vehicle (EV) mode to a hybrid electric vehicle (HEV) mode and operate a hybrid starter-generator (HSG) to adjust a speed of the engine to follow the target speed,
- wherein the controller is configured to engage the engine clutch to start when the speed of the engine is maintained at the target speed, detect a kiss point generated when the engine clutch is in a slip state to learn the kiss point of the engine clutch, and increase an output of the engine based on a torque required by a driver of the hybrid vehicle when the speed of the engine and a speed of the driving motor are synchronized after the kiss point is learned, and
- wherein when the driving mode is changed from the EV mode to the HEV mode, engagement and learning of the engine clutch are simultaneously performed.
Dependencies are inferred from the claim text.