Continental Teves, Ag and Company Ohg

Itt Automotive Europe Gmbh

Itt Corporation

Georg Sonnenschein

Dieter Dinkel

Erhard Beck

Albrecht Otto

Stephan Risch

Hans-Dieter Reinartz

Helmut Steffes

Axel Hinz

Uwe Greiff

Ronald Kley

G&uuml;nther Vogel

Georg Obersteiner

Hans-Georg Zentgraf

Joachim B&ouml;ing

Christoph Wagner

Marco M&uuml;ller

Jurgen Uhlmer

Achim Possmann

Andreas Hettrich

Kristian Tarandek

The invention relates to an hydraulic unit for a motor vehicle brake system which operates according to the feedback principle, for which purpose a low-pressure accumulator is provided between the outlet valves of the wheel brakes and a pump, and the piston of which low-pressure accumulator, in the basic position, disconnects the hydraulic connection between a pressure medium chamber and a connection leading to the pump such that, in the empty state of the low-pressure accumulator, the wheel brakes are reliably disconnected from the suction side of the pump.

Hydraulic unit

A piston pump for the hydraulic energy supply in a motor vehicle, comprising a piston that is movably arranged in a stepped bore of an accommodating member that is provided with a closure, the piston carries a seat for an elastic sealing element which accommodates the sealing element with axial play, and with radial elastic preload for the purpose of sealing between piston and cylinder. The seat for the sealing element has a structure which generates forces pointing radially towards a piston axis and expanding the sealing element in a radial direction, and that the structure produces an elastic deformation of the sealing element for an increased and dosed sealing contact pressure between piston and cylinder.

Piston pump

A piston pump () for a hydraulic consumer of an electronically controlled vehicle brake system, carries a stepped piston () and centers a sealing assembly () which is retained in an axial direction Ax by a step () on the stepped piston (), on the one hand, and is retained by a spring cage (), on the other hand. The stepped piston () includes a plane support () for plane support legs () of the spring cage () The stepped piston () includes radially inwards, with respect to the support (), a stepped bore (), with the bore () accommodating centering legs () of the spring cage (). Coaxially as well as inside the stepped bore (), a spring-loaded valve member () of a non-return valve is arranged. A resetting spring () is supported on an abutment () of the bushing () on the one hand and on the spring cage () on the other hand The bushing () is provided with a stop () for the stepped piston (), so that stepped piston (), resetting spring (), non-return valve, and sealing assembly () are arranged within the bushing () as a subassembly that can be handled independently.

In a piston pump, in particular, for the pressure fluid conveyance in hydraulic, slip-controlled brake systems, comprising at least one piston, a suction valve and a pressure valve, it will be possible for the suction and pressure valves to be externally checked in that the suction valve and the pressure valve are formed on a structural unit adapted to be separately handled. Preferably, the structural unit comprises a sleeve-type section in which the piston is guided.

In an electrohydraulic unit for pressure control in brake systems for automotive vehicles which includes mechanical, hydraulic and/or electric structural elements such as control valves, accumulator pistons, pump components and pump drive parts arranged in accommodating bores of a one-part housing, and with parallel accommodating bores for control valves disposed in pairs side by side in two rows in a housing surface, the control valves which are connected to the slave cylinders of one vehicle axle that have a volume requirement lower than the volume requirement of the slave cylinders of the other vehicle axle, and the accommodating bores of these control valves have a smaller diameter and are arranged offset from the middle of the row in the direction of a lateral housing surface.

Electrohydraulic unit for pressure control in brake systems for automotive vehicles

Hydraulic brake system with brake slip control and traction slip control

Brake pressure regulator

Hydraulic regulator for a brake pressure control apparatus

Growing community of inventors

Eschborn, Germany

Georg Sonnenschein