Vehicular brake system with electronic anti-lock control and traction slip control

US4818038A · kind A · utility

Assignee

• Alfred Teves GmbH · DE

Inventors

• Norbert Ocvirk · Offenbach, DE
• Lutz Weise · Mainz, DE
• Horst Becker · Frankfurt am Main, DE
• Otto Determann · Darmstadt, DE

Key dates

• Filing date: Jul 15, 1987
• Grant date: Apr 4, 1989
• Expiry date: Jul 15, 2007

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60T8/445
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A brake system for vehicles with electronic anti-lock control and traction slip control is equipped with a dual-circuit braking pressure generator (1) with preferably diagonal brake-circuit allotment. In the control phases, an auxiliary-pressure supply system (5), instead of the braking pressure generator (1), is hydraulically connected to the wheel brakes. Each brake circuit (I, II) contains, in the pressure-fluid conduits from the braking pressure generator to the wheel brakes, one joint multi-directional control valve (10, 11) and, connected in series thereto, individual wheel multi-directional control valves (12 to 15) which are likewise open in their inoperative position. In lieu of the braking pressure generator, the auxiliary-pressure supply system (5)--which generates pressure proportional to the pedal force during anti-lock control, while it generates uncontrolled pressure during traction slip control--is connected to the wheel brakes during the control phases. The point of connection is located in each case between the joint valves (10, 11) and the individual wheel multi-directional control valves (12 to 15).