Auxiliary-energy-supplied brake slip control system of a vehicular hydraulic brake system

US4745750A · kind A · utility

Assignee

• Alfred Teves GmbH · DE

Inventors

• Juan Belart · Walldorf, DE
• Wolfram Seibert · Darmstadt, DE
• Norbert Ocvirk · Offenbach, DE
• Juergen Schonlau · Eltville am Rhein, DE
• Guenter Trach · Offenbach, DE

Key dates

• Filing date: Sep 18, 1986
• Grant date: May 24, 1988
• Expiry date: Sep 18, 2006

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60T13/146
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

An auxiliary-energy-supplied brake slip control system of a vehicular hydraulic brake system with a brake-pedal-operable master cylinder arrangement (12) and with auxiliary energy supply into the working chamber (16) of the master cylinder. The master cylinder piston (23) portion facing the working chamber (16) is enclosed by a sleeve (58) which is longitudinally displaceable with respect to the master cylinder piston (23) and the master cylinder bore (63). The master cylinder piston (23) having radially extending projections or a collar (66) which, in the brake release phase, rests at the working-chamber-side front face of the sleeve (58) and moves the same back into its initial position. The booster-side front face of the sleeve (58) confines an annular space or a chamber (69) provided in the master cylinder housing and communicates with the booster chamber (21) by way of a pressure line (64). Thus in case of a defective hydraulic brake booster (11) the sleeve (58) remains in its initial position and only the cross-sectional surface of the master cylinder piston (23) being effective, which provides abrupt change in ratio.