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Master cylinder, especially for a regulated brake system

A technology of pistons and transverse holes, applied in brakes, brake transmissions, hydraulic brake transmissions, etc., can solve the problems of internal sealing lip damage, torsion, etc.

Active Publication Date: 2008-04-30
CONTINENTAL AUTOMOTIVE TECH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, disadvantageously, when crossing the When surrounding the outer groove, the inner sealing lip of the sealing element is pushed into the outer groove by preloading, which can also cause damage or twisting of the inner sealing lip

Method used

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  • Master cylinder, especially for a regulated brake system
  • Master cylinder, especially for a regulated brake system
  • Master cylinder, especially for a regulated brake system

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0023] FIG. 1 shows a longitudinal sectional view of a first embodiment of a master cylinder 1 , which is used, for example, in a controlled braking system with drive anti-skid (ASR) and / or electronic stability program (ESP) and is designed as a plunger. And cascade (Tandem) structure. The way in which such a master cylinder 1 works is known in principle, so that the features which are important for the invention will mainly be described.

[0024] The master cylinder 1 comprises a first piston 3 and a second piston 4 movable in a housing 2, wherein in annular grooves 23, 24 of the housing 2 are accommodated annular sealing elements 5, 6 having Dynamically stressed inner sealing lips 26 , 27 and statically stressed outer sealing lips 28 , 29 . The dynamically stressed inner sealing lips 26, 27 bear against the pistons 3, 4 with a first sealing surface, while the statically stressed outer sealing lips 28, 29 bear against the bottom of the annular grooves 23, 24 with a second se...

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PUM

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Abstract

The present invention relates to a master cylinder(1), especially for a regulated brake system. The master cylinder comprises at least one piston(3,4;53,54)that can be displaced in a housing(2)and is sealed, by means of a sealing element(5,6)arranged in an annular groove(23,24)of the housing(2), from a pressurized region(7,8)that can be connected to a pressureless wake region(11,12)by means of transversal boreholes(9,10;50,51)in the piston(3,4;53,54). The invention is based on the fact that the inner side(13,14;59,60)of the piston(3,4; 53,54)is provided with recesses(15,16,17)in which the transversal boreholes(9,10;50,51)end.

Description

technical field [0001] The invention relates to a master cylinder, in particular for a controlled braking system, comprising at least one piston displaceable in a housing, the piston being sealed against a pressure chamber by a sealing element arranged in an annular groove of the housing, said pressure chamber Connection to an unpressurized supply chamber / follower chamber is possible via a transverse bore formed in the piston. Background technique [0002] A master cylinder of this type is known, for example, from DE 101 20 913 A1, in which the cross-section of the transverse bore is small in order to keep the idle stroke of the master cylinder as short as possible. When used in a controlled braking system, e.g. with drive anti-skid (ASR) or electronic stability program (ESP), in the case of control intervention (Eingriff) by the pump, from the pressure medium container via the master cylinder Additional suction of pressure medium. The disadvantage here is that the small c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60T8/38B60T11/232B60T11/16
CPCB60T11/16B60T11/232
Inventor P·德洛特H·柯尼格U·容曼A·比朔夫J·洛克M·库斯特
Owner CONTINENTAL AUTOMOTIVE TECH GMBH