Control logic for an anti-lock vehicle brake system
AssigneeWABCO Westinghouse Fahrzeugbremsen GmbH
InventorsHarald Koster, Helmut Pannbacker, Henrich Riedemann
Life of this patent
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Abstract
An automatic control logic for an anti-lock protected vehicle braking plants is provided for all-terrain operation. In this case, the standard automatic control logic for road operation is switched, by the driver with an all-terrain switch (13) to a special automatic control logic for all-terrain operation. The special automatic control logic generates time periods, during which a short-term blocking of the automatically controlled wheels (12) is intentionally permitted. The locking time periods have a time duration of about 240 ms. The braking distance of the vehicle in cross-country terrain is shortened while a sufficient cornering force remains based on the all-terrain automatic control logic.
Claims41
A method for controlling brakes of an anti-lock protected vehicle braking system comprising generating signals within an electronic device for a wheel deceleration, a wheel acceleration, and a wheel slip said electronic device having a standard automatic control logic for modulating brake pressure during time periods under normal operating conditions of the vehicle and having a special automatic control logic for modulating brake pressure during an all-terrain operating state of the vehicle;
- switching to the special automatic control logic on with an all-terrain switch, wherein the special automatic control logic is furnished for all-terrain operation;
- generating additional time periods with the special automatic control logic during which a short-term locking of the automatically controlled wheels occurs based on signals furnished by the special automatic control logic to thereby modulate the brake pressure.
An automatic control circuit for an anti-lock protected vehicle braking system comprising
- a wheel speed sensor having an output and for monitoring the wheel speed and for delivering a signal corresponding to the wheel speed through said output;
- a signal processing stage having an input connected to the output of the wheel speed sensor for generating signals corresponding to a wheel deceleration, a wheel acceleration, and a wheel slip, said signal processing stage having a standard automatic control logic for modulating brake pressure during time periods under normal operating conditions of the vehicle and having a special automatic control logic for modulating brake pressure during an all-terrain operating state of the vehicle and wherein the special automatic control circuit is adapted to control all-terrain operation;
- an all-terrain switch connected to the signal processing stage, wherein the driver can switch on the special automatic control circuit with the all-terrain switch;
- control means for actuating the special automatic control circuit such that additional time periods are generated during which a short-term locking of an automatically controlled wheel occurs to thereby modulate a brake pressure.
An automatic control logic for an anti-lock protected vehicle braking system, wherein signals are generated within the electronic device for a wheel deceleration, a wheel acceleration, and a wheel slip, said electronic device including a standard automatic control logic for modulating brake pressure during time periods under normal operating conditions of the vehicle and having a special automatic control logic for modulating brake pressure during an all-terrain operating state of the vehicle, wherein the additional special automatic control logic and, a special programming part, respectively, is furnished for all-terrain operation, which special automatic control logic is switched on by a driver with an all-terrain switch (13) to thereby modulate the brake pressure, and which special automatic control logic is formed such that additional time periods are generated during which a short-term locking of the automatically controlled wheels (12) occurs.
Dependencies are inferred from the claim text.