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AssigneeSchaeffler Technologies AG & Co. KG
InventorsUlrich Neuberth, Florian Eppler, Daniel Muller, Michael Reuschel
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The invention relates to a method for reducing chatter vibrations of a friction clutch controlled automatically by a clutch actuator on the basis of a target clutch torque (M(s)) assigned to a clutch torque which is to be transmitted, which friction clutch is positioned in a drivetrain of a motor vehicle between an internal combustion engine and a transmission, having a present actual clutch torque which is marked by vibrations as a result of vibrations which occur occasionally (M(i)), wherein from a transmission behavior of the present actual clutch torque (M(i)) an absolute amplitude and a phase of an input signal detected at the output of the friction clutch and conveyed to a regulator are ascertained, from these a phase-selective disturbance torque is ascertained, from the latter a phase-correct correction torque (M(k)) is determined, and with this the target clutch torque (M(s)) is corrected by means of the regulator. In order to be able to design the method robustly, the correction torque (M(k)) is weighted with a specifiable intensification factor.
A method for reducing chatter vibrations of a friction clutch controlled automatically by a clutch actuator based on a target clutch torque (M(s)) assigned to a clutch torque which is to be transmitted, said friction clutch is positioned in a drivetrain of a motor vehicle between an internal combustion engine and a transmission, having a present actual clutch torque which is marked by vibrations as a result of vibrations which occur occasionally (M(i)), the method comprising ascertaining an absolute amplitude and a phase of an input signal detected at an output of the friction clutch from a transmission behavior of the present actual clutch torque (M(i)) and conveyed to a regulator, ascertaining a phase-selective disturbance torque from the absolute amplitude and the phase of the input signal, determining a phase-correct correction torque (M(k)), and correcting a target clutch torque (M(s)) using the phase-correct correction torque by the regulator, and weighting the correction torque (M(k)) with a definable intensification factor.
Dependencies are inferred from the claim text.