Method and open-loop and closed-loop control device for compensating for a clutch torque of a hybrid separating clutch taking into consideration the rotational speed of an electric machine
AssigneeSchaeffler Technologies AG & Co. KG
InventorsChristian Weber, Ralf Mannsperger
Life of this patent
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Abstract
A method and an open-loop and closed-loop control device for compensating for a clutch torque of a separating clutch located between an internal combustion engine and an electric machine in a hybrid drive of a motor vehicle. The compensation takes into consideration the rotational speed of the electric machine. The rotational speed of the electric machine impacts clutch torque. A compensation factor is calculated, and increases or decreases the necessary clutch torque, causing a corresponding actuation of an actuator to achieve the necessary clutch torque.
Claims9
A method for compensating for a clutch torque of a separating clutch of a hybrid drive of a motor vehicle, taking into consideration a rotational speed of an electric machine, wherein the separating clutch is provided between an internal combustion engine and the electric machine and an actuator is assigned to the separating clutch for the actuation of the same comprising:
- a calibration function, which represents a factor as a function of the rotational speed of the electric machine is stored in a memory of an open-loop and closed-loop control device;
- during driving operation an appropriate clutch torque is required from the separating clutch and, by using the calibration function, a disengagement travel is calculated and set on the actuator;
- and
- depending on the rotational speed of the electric machine, a factor is calculated which internally increases or decreases the required clutch torque.
A system for compensating for a clutch torque of a separating clutch which is provided between an internal combustion engine and an electric machine, the system comprising:
- an open-loop and closed-loop control device including a memory, in which a calibration function which represents a factor as a function of a rotational speed of the electric machine is stored;
- and
- an actuator of the separating clutch connected to the open-loop and closed-loop control device via a communications link, wherein, via the communications link during driving operation the actuator receives from the open-loop and closed-loop control device a measure for a disengagement travel of the actuator, in order to set a required clutch torque of the separating clutch;
- wherein the electric machine is connected via the communications link to the open-loop and closed-loop control device, which, depending on the rotational speed of the electric machine, calculates a factor which internally increases or reduces the required clutch torque of the separating clutch.
A system for compensating a clutch torque of a separating clutch, the system comprising:
- the separating clutch located axially between an internal combustion engine and an electric machine:
- an actuator configured to selectively actuate the separating clutch;
- and
- a control device coupled to the electric machine and configured to:
- determine a rotational speed of the electric machine, and
- determine a required clutch torque for actuation of the separating clutch that increases or decreases depending on the rotational speed of the electric machine,
- commanding the actuator to move a desired travel distance that corresponds with the rotational speed of the electric machine to achieve the required clutch torque
- wherein the clutch includes a disk spring, a pressure plate, and a mating pressure plate, wherein the disk spring, the pressure plate, and the mating pressure plate are integrated with a rotor of the electric machine to rotate therewith.
Dependencies are inferred from the claim text.