Schaeffler Technologies Ag & Co .kg

Luk Lamellen Und Kupplungsbau Beteiligungs Kg

Markus Kneissler

Matthias Gramann

Klaus Henneberger

Klaus K&uuml;pper

Julian Botiov

Jens Schn&auml;bele

Patrick Schieferdecker

A hydrostatic actuator, in particular, a hydrostatic clutch actuator, having a master cylinder including a housing and a piston that is axially displaceable in the housing and applies pressure to a pressure chamber, a gearing mechanism converting a rotary drive into an axial movement, and an electric motor driving the gearing mechanism to rotate and including a stator and a rotor, where the pressure chamber is arranged axially between the piston and the electric motor with respect to an axis of rotation of the electric motor.

Hydrostatic clutch actuator

Method for determining wear of a friction plate of an automatically actuated friction clutch, particularly in a motor vehicle driven by an internal combustion engine, wherein initially at a prescribed clutch slip and a prescribed clutch torque in an earlier friction lining test point an earlier clutch actuation travel is determined and stored, later again at the prescribed clutch slip and the prescribed clutch torque in a later friction lining test point a later clutch actuation travel is determined, thereafter the earlier clutch actuation travel and the later clutch actuation travel are compared to each other and a differential value is determined, and thereafter a friction lining wear is determined using the differential value, in order to reliably determine friction lining wear in a time interval and with only little effort, so that a depreciation of function due to a worn friction lining can be prevented in a timely manner.

Method for determining wear of a friction plate

A motor vehicle has an automated clutch ( ) and/or an automated transmission ( ) that are operated by an actuator ( ) through control commands of a control device ( ). At least some of the control commands depend on sensor input indicating whether or not the brakes of the motor vehicle are applied. To detect the actuation of the brakes, the motor vehicle uses two brake sensors or switches ( ) rather than only one, thereby providing an additional margin of safety in the operation of the vehicle.

Motor vehicle with an automated torque-transfer system

Growing community of inventors

Buehlertal, Germany

Markus Kneissler