Vehicle anti-skid system, and method of brake control

US4489382A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Wolf-Dieter Jonner · Freising, DE
• Wolfgang Korasiak
• Heinz Leiber · Oberriexingen, DE

Key dates

• Filing date: Feb 26, 1983
• Grant date: Dec 18, 1984
• Expiry date: Feb 26, 2003

Classification

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

Abstract

To decrease the braking distance or braking path of a vehicle equipped with an automatic brake anti-lock or automatic anti-skid system, under unusual operating conditions in which the wheels on one side (right) are on a slippery surface, for example ice, and the wheels on the left side (L) of the vehicle are on a high-friction surface, for example clear roadway, without introducing excessive yaw during braking, pressure drop in the brake line at the low-friction side is sensed and braking pressure increased at the high-friction side after elapse of a predetermined timing interval, regardless of continued decreased braking pressure at the low-friction side; the increase in braking pressure at the high-friction side preferably occurs in pulses (.DELTA.P), the pulse lengths and pulse gaps of which are a function of vehicle speed (v).