Anti-skid automotive brake control system including wheel deceleration calculation with shorter lag-time and method for performing calculation

摘要

in order to accomplish the above-mentioned and other objects, an anti-skid control system, takes a procedure for .sampling input timing data of every given number of sensor signals, which given number is adjusted so as to a difference of period of time measured with respect to mutually adjacent signal-to-signal intervals is great enough to perform the anti-skid control operation based thereupon. The anti-skid control system processes the input timing data for deriving a wheel speed, a wheel acceleration and deceleration and so forth based on the input timing data. The wheel acceleration and deceleration is calculated based on the successively sampled three input timing data. An input timing data is sampled relative to a first sensor signal at which procedure for determining the input timing data sample mode starts, as a first input timing data. Another input timing data is sampled relative to the sensor signal at which a difference of mutually adjacent signa-to-signal intervals greater than the predetermined value is obtained, as a second input timing data. Arithmetic operation will be carried out in response to sampling input timing data subsequently to sampling of the second input timing data, based on the first, second and last sampled input timing data.