Lucas Industries Public Limited Company

Hella Kg Hueck and Co.

Hella Kg Hueck Co.

Lucas Industries Publ. Ltd. & Co.

Werner Wiegmann

Detlef Niggemann

Gunther Heinz

Konrad Schneider

Michael Keller

Harald Bestmann

Detlef Staufenbiel

An anti-lock brake control system comprises at least two micro-computers and at least two input/output circuits which monitor one another as well as functions of other components of the anti-lock brake control system. If faulty voltages appear within the anti-lock brake control system or if false values in transmitted signals occur, the anti-lock brake control system will be dependably shut down. By integrating a plurality of monitoring functions in the input/output circuits as well as by building redundancies into the anti-lock brake control system, a high level of safety is achieved, in spite of the small number of necessary components and the small production cost associated therewith.

Anti-lock brake control system

A circuit has circuit amplifiers (T1, T2) and inductive loads (MV1, MV2) with the circuit amplifiers being controlled by control signals provided by a microcomputer (MC). The circuit accomplishes this control while monitoring a load circuit, comprised of the circuit amplifiers and the loads, and terminates control of the circuit amplifiers, without assistance of the controlling microcomputer, upon occurrence of incorrect voltages in the load circuit. Thus, the circuit of this invention allows particularly fast termination of control of the load circuit upon the appearances of critical voltages and also allows the monitoring of the load circuits by the microcomputer in a particularly uncomplicated manner.

Circuit for controlling, monitoring, and terminating control of,

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Lippstadt, Germany

Werner Wiegmann