Brake pressure control apparatus for a hydraulic automotive vehicle brake system

US5401085A · kind A · utility

Assignee

• Alfred Teves GmbH · DE

Inventors

• Jochen Burgdorf · Mühlheim am Main, DE
• Helmut Steffes · Hattersheim, DE
• Peter Volz · Darmstadt, DE
• Erhard Beck · Darmstadt, DE
• Dalibor Zaviska · Frankfurt am Main, DE
• Albrecht Otto · Yokohama, JP
• Stefan Risch · Wiesbaden, DE

Key dates

• Filing date: Feb 16, 1993
• Grant date: Mar 28, 1995
• Expiry date: Feb 16, 2013

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/87209
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A brake pressure control apparatus having a brake pressure master unit, a brake connected to the brake pressure master unit through a pressure line, a pressure-controlled inlet valve which is positioned in the pressure line and through which the brake pressure master unit is connected, in a first switching position, through a restrictor orifice to the brake and which is furnished with a control piston which in one direction is subject to the pressure in the pressure line and in the opposite direction is subject to the action of a spring and of the pressure in a return line which contains an outlet valve which is controllable by a control device, which blocks the return line in its position of rest and which releases the return line in its switching position. The inlet valve is provided with a valve element which interacts with the control piston and which, in the second switching position, blocks the pressure line and releases a valve seat formed by a longitudinal bore of the control piston making the brake pressure slave unit connectible to the return line.