Antiskid controller

Abstract

Abstract PURPOSE: To improve feeling in antiskid control as well as the braking efficiency by varying the time ratio for holding the brake oil-pressure at intensification or reduction when the wheel speed is above or below a desired whell-speed with the acceleration or deceleration speed of the wheels respectively. CONSTITUTION: When a wheel speed V w >a desired wheel speed V wγ , the output e 3 of a comparator 3 is 1 and an AND gate 9 is inhibited. Therefore, the output e 5 of a comparator 5b is blocked, and an AV signal is constantly 0. An acceleration/ deceleration signal e 1 from a differentiating circuit 1a and an amplifier 2a is added to one of the inputs of a comparator 5a. To the other input, a triangular wave signal e t having a fixed cycle shorter than a skid cycle is added from a triangular- wave generator 4. Consequently, when e 1 >e t , the comparison output e 4 is 1; when e 1 <e t , the output e 4 is 0, and the output EV of an amplifier 10a is also e 4 . Therefore, an oil-pressure control signal output circuit 11 generates a hold signal when AV is 0 and EV is 1. COPYRIGHT: (C)1981,JPO&Japio

Inventors

• 👤 Toshiro Matsuda
• 👤 Minoru Honda

Bibliographic Details