Fag Kugelfischer Georg Schafer

Fte Automotive Gmbh

Fahrzeugtechnik Ebern Gmbh

Karl Peuker

Herbert Sauer

Norbert Oberlack

Wilhelm Heubner

Rainer Porzel

Geza Zsari

Otto Kadlac

A hydraulic actuating device () for an automotive friction clutch (), has a master cylinder () whose master piston () can be impinged upon with a master force (F) via an actuating mechanism () and can be displaced by a master travel (S), and a slave cylinder () with a slave piston () which is hydraulically connected in series to the master piston via a liquid column and is functionally linked with a clutch-release member () of the automotive friction clutch. The actuating device may be provided with an adjusting unit () may have an adjusting piston (). The adjusting piston is hydraulically connected in series to the master piston and can be impinged upon with a force and displaced via a transmission () that is driven by an electric motor. The actuating device further has a control unit (C) which is used to control the adjusting unit especially subject to a master variable (F; S).

Hydraulic actuating device for an automotive friction clutch

A method and a device for the hydraulic actuation of a clutch operatively connected to a clutch receiver cylinder (6), especially for automobiles, are disclosed, in which, in a servo circuit (S), a servo pressure is generated, which

Method and device for the hydraulic actuation of a clutch, especially

A hydraulic cylinder, preferably for use as a master or slave brake cylinder or in a hydraulic clutch system, maintains in a simple and inexpensive manner through the use of eccentric bushings the stroke length of the piston rod. The distance between the attachment lug and the attachment point determines the stroke length and is varied by adjusting the narrow tolerance of each bushing.

Hydraulic cylinder

In order to determine the boiling point of a liquid, especially a nonaqueous one such as a brake fluid, a device suspended in a body of that liquid--e.g. in a reservoir supplying fluid to a brake cylinder--forms a narrow chamber which is open at the bottom and the top and which contains means for heating the liquid in that chamber and measuring its temperature; the two functions can be simultaneously performed by a thermistor. When the boiling point is reached and the liquid in the chamber is vaporized, partial evaporation of that liquid and replacement thereof by fresh liquid from the main body results in a leveling of the temperature curve; the boiling point marked by this event can be read on a meter and/or qualitatively indicated by differently colored lights, for example. An excessive temperature rise early in the test will also show an unduly low liquid level in the reservoir.

Method of determining the boiling point of a liquid

In order to determine the boiling point of a liquid, especially a nonaqueous one such as a brake fluid, a device suspended in a body of that liquid--e.g. in a reservoir supplying fluid to a brake cylinder--forms a narrow chamber which is downwardly open and upwardly closed and which contains means for heating the liquid in that chamber and measuring its temperature; the two functions can be simultaneously performed by a thermistor. When the boiling point is reached and the liquid in the chamber is vaporized, a lessening of the heat conduction to the main body of liquid results in a steep rise in temperature; the boiling point marked by this event can be read on a meter and/or qualitatively indicated by differently colored lights, for example. An excessive temperature rise early in the test will also show an unduly low liquid level in the reservoir.

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Ebern, Germany

Karl Peuker