Multiple-circuit brake system

US4919492A · kind A · utility

Assignees

• Saab-Scania AB · SE
• Robert Bosch GmbH · DE

Inventors

• Hakan Samuelson · Fagersta, SE
• Eric Thoms · Åkers styckebruk, SE
• Ingolf Grauel · Lambach, DE
• Werner Stumpe · Kornwestheim, DE
• Franz Maurer · Kempten, DE

Key dates

• Filing date: Jun 3, 1983
• Grant date: Apr 24, 1990
• Expiry date: Jun 3, 2003

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60T17/18
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A multiple-circuit brake system for motor vehicles in which a multiple-circuit braking value transducer is embodied partially electrically and partially as a pneumatic control valve and is intended for triggering pressure control valves, the wheel brake cylinders being disposed following these pressure control valves. One pressure-medium reservoir is associated with each pressure control valve, and the controlling energy for each of these pressure control valves is drawn from the pressure-medium reservoir associated with that valve. In the pneumatic brake circuit (I), a further pressure-medium reservoir is provided preceding the braking value transducer, as a result of which it is possible, with the aid of two-way check valves, to actuate the wheel brake cylinders with the pneumatic brake circuit (I) whenever the electrical brake circuits (II, III) have failed.