Anti-skid braking system utilizing pressure feedback
Abstract
Abstract CATION RATES. THE FIRST SET POINT ACTIVATES THE ANTI-SKID SYSTEM. A NOISE DETECTOR THAT SENSES CHANGES IN WHEEL ACCELCERATION BY ROUGH ROAD SURFACES. A VARIABLE FREQUENCY CLOCK CAUSED BY ROUGH ROAD SURFACES. A VARIABLE FREQUENCY CLOCK IS USED TO PROVIDE A SIGNAL OF A FREQUENCY PROPORTIONAL TO WHEEL ACCELERATION TO SLOWLY APPROACH THE POINT OF MAXIMUM TORQUE. AN ADAPTIVE BRAKING SYSTEM TO PREVENT SKIDDING OF AN AUTOMATIVE VEHICLE BY REDUCING THE BRAKE PRESSURE YET MAINTAINING NEAR MAXIMUM BRAKING TORQUE. A TRANSDUCER MEASURES THE BRAKE PRESSURE TO PROVIDE AN ADDITIONAL INPUT TO CONTROL LOGIC ALREADY INCLUDING INPUTS FROM WHEEL SPEED SENSORS AND A VEHICLE ACCELERATION SENSOR OR VEHICLE SPEED SENSOR. THE MAXIMUM PRESSURE ON EACH CYCLE IS MEMORIZED AND A PERCENTAGE VALUE USED TO INSURE THAT ON THE NEXT CYCLE THE PRESSURE BUILD WILL NOT BE PERMATURELY TERMINATED. A DERIVATIVE OF THE BRAKE PRESSURE IS USED TO CHANGE A FIRST SET POINT IN ACCORDANCE WITH PRESSURE APPLI-
Inventors
- 👤 George B Hickner
- 👤 Donald W Howard
- 👤 Ward C Suttle
Bibliographic Details
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