Process and device for dealing with errors in electronic control devices

US5440487A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Heinz J. Althoff · Oberursel, DE
• Guenter Driedger · Oberriexingen, DE
• Klaus Meder · Ditzingen, DE
• Jurgen Schuh · Markgröningen, DE
• Manfred Stahl · Châteaudun, FR
• Karl C. Viehmann · Murr, DE
• Eberhard Weiss · Pfullingen, DE
• Jurgen Neumann · Lüneburg, DE
• Bert Zorbach · Gerlingen, DE

Key dates

• Filing date: Jul 25, 1994
• Grant date: Aug 8, 1995
• Expiry date: Jul 25, 2014

Classification

• Technology area (CPC G): Physics
• CPC primary: G06F11/2017
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

The invention proposes a process for error recovery in electronic control devices as well as apparatus for controlling the steering angle of the rear wheels of a motor vehicle. The control device controls an actuating member to which is connected a safety device. In the main operation of the control device, transmitter signals are detected, actuating values are calculated and the actuating member is controlled corresponding to the calculated values. The calculated actuating values and the detected transmitter signals are checked for consistency. On the basis of the checked values, a decision is made as to whether to continue running the main program or resort to one of two emergency measures. In the first emergency measure, the safety device is activated and the control of the actuating member is switched off. In the second emergency measure, the signals of transmitters continue to be detected and actuating values are calculated from these signals. Before adjusting the actuating member, the calculated actuating values are multiplied by a factor decreasing over time to achieve a gradual damping of the actuating amplitude of the actuating member.