Hydraulic unit for an anti-lock brake system

US5788344A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Michael Friedow · Tamm, DE
• Juergen Lander · Stuttgart, DE
• Heidi Kroebel · Heilbronn, DE

Key dates

• Filing date: Aug 20, 1996
• Grant date: Aug 4, 1998
• Expiry date: Aug 20, 2016

Classification

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

Abstract

The invention relates to a hydraulic unit for a vehicle brake system with ABS. Before being filled with brake fluid, the brake system must be evacuated in order to achieve complete bleeding. In order to evacuate a return line, which is separated from a brake line by pressure reduction magnet valves that are closed in their position of repose, it is known to provide a connecting line with a check valve between the brake line and the return line. The hydraulic unit connects the check valves in parallel to the magnet valves and integrates the check valves with the magnet valves. This simplifies assembly. Since no additional holes and conduits in the hydraulic unit are necessary, existing hydraulic units can be used.