Method and apparatus for controlling and monitoring hydraulic brake slip

US4555144A · kind A · utility

Assignee

• ITT Industries · US

Inventors

• Juan Belart · Walldorf, DE
• Jochen Burgdorf · Mühlheim am Main, DE
• Dieter Kircher · Frankfurt am Main, DE
• Hans-Wilhelm Bleckmann · Prüm, DE
• Lutz Weise · Mainz, DE

Key dates

• Filing date: Jul 18, 1983
• Grant date: Nov 26, 1985
• Expiry date: Jul 18, 2003

Classification

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

Abstract

In the braking system of a motor vehicle, a hydraulically or electromagnetically actuatable valve is inserted into the return line to control and monitor hydraulic brake slip control devices supplied with energy from an external source. This valve opens or closes the return passage of hydraulic fluid from pressure reducing valves of static brake circuits in dependence upon the dynamic pressure developing in the booster chamber of brake valve network or in the prechamber of the master cylinder upon application of the brake or upon start of the brake slip control. Pressure reduction in the static brake circuits for preventing a wheel lock-up will thereby be avoided, if in the event of a control action no dynamic pressure develops in the booster chamber or in the prechamber on account of a defect.