Automatic antilock control system
AssigneeTeldix GmbH
InventorsHeinz Leiber, Jurgen Gerstenmeier, Wolfgang Korasiak
Life of this patent
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Abstract
An automatic antilock control system for vehicles comprises a sensor which determines the presence of a tendency of a wheel to lock, a brake pressure open loop control device for varying the brake pressure at the said wheel and controlled by an evaluation circuit responsive to the sensor, the evaluation circuit including switch apparatus for producing open loop control signals which achieve a steep brake presence variation during an antilock control operation and thereafter achieve a further slower pressure variation, and open loop control apparatus for varying the duration of the pressure variation in dependence on the duration of the steep pressure variation of the previous cycle.
Claims17
An automatic antilock control system for the brakes of the wheels of a vehicle comprising:
- a sensor for determining a tendency to lock of a vehicle wheel, a brake pressure control device for varying the brake pressure at the brakes of said vehicle wheel, an evaluation circuit for processing signals from said sensor and producing control signals for controlling said brake pressure control device, circuit means in said evaluation circuit for producing control signals for producing a steep pressure variation and thereafter a slower pressure variation in the same direction as said steep pressure variation in the course of an antilock control phase, and control means in said evaluation circuit for varying the duration of said steep pressure variation in dependence on the duration of said steep and slower pressure variations in at least the preceding cycle, with said dependence being such that the duration of said steep pressure variation becomes longer, the longer the duration of said steep and slower pressure variations in said preceding cycle.
An automatic antilock control system for the brakes for the wheels of a vehicle comprising:
- a sensor for determining a tendency to lock of a vehicle wheel, a brake pressure control device for varying the brake pressure at the brakes of said vehicle wheel, and evaluation circuit for processing signals from said sensor and producing control signals for controlling said brake pressure control device, circuit means in said evaluation circuit for producing control signals for producing a steep pressure rise with a steep gradient after a pressure reduction triggered by a locking tendency and thereafter a slower pressure rise and control means in said evaluation circuit for varying the duration of said steep pressure rise in dependence on the duration of the pressure rise of at least the previous cycle.
Dependencies are inferred from the claim text.