Method for reducing chatter vibrations in a friction clutch in a drive train of a motor vehicle

US10228028B2 · kind B2 · utility

Assignee

• Schaeffler Technologies AG & Co. KG · DE

Inventors

• Ulrich Neuberth · Ötigheim, DE
• Florian Eppler · Karlsruhe, DE
• Daniel Muller · Stein am Rhein, CH
• Michael Reuschel · Ottersweier, DE

Key dates

• Filing date: Mar 26, 2015
• Grant date: Mar 12, 2019
• Expiry date: Aug 16, 2035

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16D2500/7109
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A method is disclosed 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. The friction clutch is positioned in a drivetrain between an internal combustion engine and a transmission, having a present actual clutch torque which is marked by vibrations as a result of vibrations (M(i)). 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, and a phase-selective disturbance torque is ascertained. From the phase-selective disturbance torque, a phase-correct correction torque (M(k)) is determined, and the target clutch torque (M(s)) is corrected by the regulator. The correction torque (M(k)) is weighted with a specifiable intensification factor.