Hydraulic anti-locking brake unit

US5215359A · kind A · utility

Assignee

• Alfred Teves GmbH · DE

Inventors

• Jochen Burgdorf · Mühlheim am Main, DE
• Hans-Dieter Reinartz · Frankfurt am Main, DE
• Helmut Steffes · Hattersheim, DE
• Joachim Maas · Griesheim, DE
• Dieter Dinkel · Eppstein, DE

Key dates

• Filing date: May 14, 1991
• Grant date: Jun 1, 1993
• Expiry date: May 14, 2011

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S303/901
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A hydraulic anti-locking brake unit is presented in which the brake line is shut off by an isolating valve (20) during a control action. For the reduction of the pressure, the outlet valve (7) is opened, so that the pump (14) delivers hydraulic fluid out of the wheel brake into the high-pressure accumulator (19). For a renewed pressure build up, the inlet valve (6) is opened, so that hydraulic fluid flow is directed out of the high-pressure accumulator (19) back to the wheel brake. In order to be able to utilize a high-pressure accumulator having a low receiving capacity, various valving arrangements are disclosed to direct excess flow from the pump either to the master cylinder or a low pressure accumulator.