System for controlling brake pressure based on fuzzy logic using steering angle and yaw speed

US5634698A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Chi-Thuan Cao · Ditzingen, DE
• Rolf Becker · Rheydt, DE
• Ulrich Belzner · Schwieberdingen, DE
• Thorsten-Wilhelm Moeller · Schwieberdingen, DE
• Bernd Lieberoth-Leden · Leonberg, DE

Key dates

• Filing date: Feb 21, 1995
• Grant date: Jun 3, 1997
• Expiry date: Feb 21, 2015

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60T2260/022
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

An ABS which evaluates slip values prescribes pressure values for the wheel brakes. In order to improve the driving stability, these pressure values are varied by a brake controller using the deviation of the yawing speed from a set value and the front-axle steering angle as input variables. The brake controller determines its output values (variation values) with the aid of the fuzzy logic. Additionally, rear-axle steering is integrated into the system, the system partially also using fuzzy logic. Subsequently, an adaptation which is based on fuzzy logic and uses the brake controller and the rear-axle steering controller in a weighted fashion is proposed.