Importance

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Abstract

An anti-skid brake control system comprises a temporary register for storing successive three input time data from which wheel acceleration and deceleration is calculated whenever the differences of intervals of the sensor signal pulses or duration of the groups of sensor signal pulses is larger than a predetermined calculation threshold. Sampling timing of the sensor signal pulses is determined so that the difference of intervals of sensor signal pulses or the difference of durations of sensor signal pulses is larger than the predetermined calculation threshold. At every derived timing corresponding to the sampling timing, wheel acceleration and deceleration is calculated based on the input timing data values. At another timing every three successive sensor signal pulses or three successive groups of sensor signal pulses being input, wheel acceleration and deceleration is calculated when the signal-to-signal difference of the sensor signal pulses or the difference of duration of the groups of the sensor signal pulses is large enough to perform calculation thereof. This another calculation timing of wheel acceleration and deceleration enables the system to follow relatively abrupt variation of the wheel speed or wheel acceleration and deceleration.

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First Claim