Motor vehicle clutch with an inductive signal transmission between a sensor on the clutch and a stationary indicator

US4474274A · kind A · utility

Assignee

• Sachs Systemtechnik GmbH · DE

Inventors

• Dieter Lutz · Schweinfurt, DE
• Wolfgang Thieler · Haßfurt, DE
• Albert Katzenberger · Roßlau, DE

Key dates

• Filing date: Nov 13, 1981
• Grant date: Oct 2, 1984
• Expiry date: Nov 13, 2001

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16D2300/18
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A clutch disk of a motor vehicle clutch is provided with a contact element. This contact element is part of a sensing circuit rotating with the clutch disk. This sensing circuit is open as long as the friction pads on the clutch disk are relatively new. Only when the friction pads have been worn to a predetermined degree, the contact element comes into contact with a friction face of the fly wheel disk of the pressure plate of the clutch, so that the sensing circuit is closed. The sensing circuit is connected through a pair of induction coils to a stationary electronic circuitry. This circuitry is influenced by the opening and closing of the sensing circuit and controls indicating means for indicating the degree of wear of the friction pads.