Method for adapting a contact point of a clutch in a drivetrain of a motor vehicle

A method for adapting a contact point in a drivetrain of a motor vehicle including a dual clutch transmission with a first clutch connected to a first input shaft for the transmission and a second clutch connected to a second input shaft for the transmission, a combustion engine, and an electric motor connected to the first input shaft via the dual clutch transmission, comprising:

• placing the first and second clutch in a disengaged first position for the first transmission input shaft the transmission is in a neutral position to the transmission output shaft;
• rotating the electric motor;
• displacing an actuator for the first clutch according to a reference actuator path from a characteristic curve for the first clutch;
• measuring the torque of the electric motor;
• and,
• replacing, in the characteristic curve, a reference torque associated with the reference actuator path with the measured torque of the electric motor.

A method for adapting a contact point in a drivetrain of a motor vehicle including a dual clutch transmission with a first clutch connected to a first input shaft for the transmission and a second clutch connected to a second input shaft for the transmission, a combustion engine, and an electric motor connected to the first input shaft via the dual clutch transmission, comprising:

• placing the first and second clutch in a disengaged first position for the first transmission input shaft the transmission is in a neutral position to the transmission output shaft;
• deactivating the electric motor;
• selecting a reference clutch torque, in a vicinity of a reference contact point for the first clutch, from a characteristic curve for the first clutch;
• displacing an actuator for the first clutch according to a reference actuator path, from the characteristic curve, belonging to the selected reference clutch torque;
• activating the electric motor until the first clutch slips;
• measuring a torque of the electric motor;
• and,
• replacing the reference clutch torque in the characteristic curve with the measured torque of the electric motor.

A method for adapting a contact point in a drivetrain of a motor vehicle including a dual clutch transmission with a first clutch connected to a first input shaft for the transmission, a second clutch connected to a second input shaft for the transmission, and an actuator for the first clutch, a combustion engine, and an electric motor connected to the first input shaft via the dual clutch transmission, comprising:

• propelling the motor vehicle at a constant velocity with the electric motor only;
• disengaging the first clutch;
• selecting a reference torque for the first clutch from a reference clutch curve;
• engaging, using the actuator, the first clutch;
• changing torque of the electric motor until the reference torque is reached for the first clutch;
• measuring a path traversed by the actuator to engage the first clutch and reach the reference torque;
• and,
• assigning the reference torque to the measured path of the actuator.