Antilocking control system

US4005910A · kind A · utility

Assignee

• Teldix GmbH · DE

Inventors

• Heinz Leiber · Oberriexingen, DE
• Werner Weber · Munich, DE

Key dates

• Filing date: Apr 23, 1976
• Grant date: Feb 1, 1977
• Expiry date: Apr 23, 1996

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60T8/1764
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

An antilocking control system for vehicles in which control signals for controlling a pressure regulating unit associated with two wheels or two groups of wheels are produced in an evaluating circuit from the signals of at least one sensor associated with these wheels or groups of wheels and in which the pressure is at times controlled based on the rotational behavior of the wheel first tending to lock (select-low) and at times based on the rotational behavior of the wheel being the last to show a tendency to lock (select-high). During the select-low mode of operation the duration T.sub.1 of the pressure buildup phase following a pressure reduction phase is measured until there again occurs a tendency to lock at at least one wheel and then the mode of operation is switched to the select-high mode. During the select-high mode of operation the duration T.sub.2 of the pressure increase period is measured and the result is continuously compared with the measured duration (T.sub.1) of the pressure buildup phase during select-low operation. When the measured duration T.sub.2 reaches a given relationship to the duration T.sub.1, the select-high mode of operation is continued for a given d…