Brake pressure generator for a hydraulic brake system for use with motor vehicles

US4708405A · kind A · utility

Assignee

• Alfred Teves GmbH · DE

Inventors

• Juan Belart · Walldorf, DE
• Wolfram Seibert · Darmstadt, DE
• Norbert Ocvirk · Offenbach, DE

Key dates

• Filing date: Jan 24, 1986
• Grant date: Nov 24, 1987
• Expiry date: Jan 24, 2006

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60T13/148
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A brake pressure generator for a hydraulic brake system for motor vehicles, comprising a booster piston (26) displaceable by a hydraulic auxiliary pressure in the actuating direction, comprising a master cylinder (2) including a stepped piston (36) to which piston pressure can be applied by a booster piston (26). The piston (36) confines a work chamber (48) and a chamber (56) decreasing in size upon movement of the piston in the actuating direction, which chamber (56), by way of a non-return valve, is on communication with the work chamber (48) and from which a conduit leads to a non-pressurized container (168), with the conduit being provided with a control valve (86). To permit employment of the brake pressure generator in slip-controlled systems a slip control is provided comprising a valve (182), by way of which, during slip control, controlled hydraulic auxiliary pressure can be supplied to the chamber (56) decreasing in size upon movement of the piston (36) in the actuating direction. A second chamber increasing in size upon movement of the piston in the actuating direction is confined by piston (36), with the said chamber, by way of a connecting line (142, 136) being in comm…