Process and circuit configuration for controlling a brake system with sequential brake pressure modulation
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United States of America Patent
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-
Jun 5, 1990
Grant Date -
N/A
app pub date -
Mar 15, 1989
filing date -
Mar 18, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A control system and method for a brake system with anti-locking and/or traction slip control and sequential brake pressure modulation. A modulator pressure pattern is formed in a circuit (33) by measuring and evaluating variables determining the pressure in the control chamber of chambers (21) of a brake pressure modulator (4). The modulator pressure pattern represents, by approximation, the course of pressure in the modulator (4). This modulator pressure pattern is considered in the brake pressure control, that is in determining the excitation periods of the multi-way valves (13-16, 22, 23, 25) determining the pressure in a modulator chamber (21) of the brake pressure modulator (4) and in the wheel brakes (9-12). The pressure pattern is formed by integration of the valve excitation periods of the pressure increase and pressure decrease characteristics of the modulator (4) under consideration or of the entire system.
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