Anti-lock hydraulic brake system

US5350226A · 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
• Norbert Ocvirk · Offenbach, DE
• Peter Volz · Darmstadt, DE
• Lutz Weise · Mainz, DE
• Helmut Fennel · Bad Soden, DE
• Hans Wupper · Friedrichsdorf, DE
• Hans-Wilhelm Bleckmann · Prüm, DE
• Erhard Beck · Darmstadt, DE
• Dieter Dinkel · Eppstein, DE
• Karlheinz Haupt · Gau-Algesheim, DE

Key dates

• Filing date: Dec 10, 1991
• Grant date: Sep 27, 1994
• Expiry date: Dec 10, 2011

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S303/90
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

An anti-lock hydraulic brake system is described wherein a throttle valve has a restrictive flow condition which becomes effective in the brake line in the event of brake slip control. Pumps for reapply pressure deliver fluid to the wheel brake via this restriction and regulating the pressure in the wheel brake is performed by control of an outlet valve. The throttle valve is operated hydraulically by various arrangements including the application of pump pressure, or by wheel brake pressure applied upon opening of the outlet valve at the start of an anti-lock control cycle.