초록 ▼

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 signa

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 signal-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.

대표청구항 ▼

An anti-skid brake control system for an automotive brake system comprising: a hydraulic brake circuit including a wheel cylinder for applying braking force to a vehicle wheel; a pressure control valve disposed within said hydraulic brake circuit and operative for increasing fluid pressure in said w

An anti-skid brake control system for an automotive brake system comprising: a hydraulic brake circuit including a wheel cylinder for applying braking force to a vehicle wheel; a pressure control valve disposed within said hydraulic brake circuit and operative for increasing fluid pressure in said wheel cylinder in a first position thereof and for decreasing the fluid pressure in the wheel cylinder in a second position thereof; a wheel speed sensor means for detecting rotational speed of said vehicle wheel and producing sensor signal pulses separated by intervals, said intervals representative of the detected wheel rotation speed; a timer means for producing a timer signal; a first means for sampling a value of said timer signal in response to a given number of said sensor signal pulses, and storing the sampled time signal value as input timing data, said input timing data including successively sampled first, second and third timer signal values; a second means for determining said given number of sensor signal pulses based on an interval between occurrence of one sensor signal pulse at which said first timer signal value is sampled and an immediately preceding sensor signal pulse occurring immediately before the occurrence of said one sensor signal pulse in such a manner that the intervals over said given number of sensor signal pulses becomes greater than a predetermined value, said second means triggering said first means for sampling said second timer signal value after given number of said sensor signal pulses as counted from said one sensor signal pulse, and sampling said third timer signal value after the given number of said sensor signal pulses as counter from the sensor signal pulse at which said second timer value is sampled; a third means for processing the stored timer signal values to produce a control signal to operate said pressure control valve at one of said first and second positions so as to maintain a slip rate at approximately optimum value, said third means being operative for deriving a wheel acceleration based on said first, second and third timer values; and a fourth means, associated with said first and third means, for interrupting operation of said third means hen said first means is active for sampling said first, second and third timer signal values.