Abstract: An anti-skid system for a motor vehicle having a driving wheel and a non-driving wheel to protect the driving wheel from skidding. The system includes a first sensor for generating a number of pulses proportional to the peripheral distance traveled by the driving wheel, a second sensor for generating a number of pulses proportional to the peripheral distance traveled by the non-driving wheel, the second sensor generating a higher number of pulses than the first sensor for the same peripheral distance traveled by the respective driving and non-driving wheels, and a unit, responsive to the signals generated by said first and second sensors, for detecting the difference in peripheral distance traveled by the driving and non-driving wheels independently of time. The detecting unit includes a circuit for producing a delay in the ignition system when the difference in peripheral distance traveled is greater than a predetermined value to adjust engine torque and to maintain optimum road adherence of the wheels.

Abstract: An improvement in and relating to powered driven and wheeled vehicles; more specifically, to improvements in wheel brake systems of such vehicles, wherein a condenser will charge in a voltage responsive to the wheel rotation at the commencement of a brake applying operation, and the discharge speed (or discharge voltage) of the condenser is made variable in response to foot brake pedal pressure. A comparison is made between this voltage and a wheel rotation-responsive voltage during the braking operation and derived through a separate part of the electronic circuit concerned. When the latter voltage is higher than the former voltage, the wheel cylinder pressure is increased through the intermediary of a pressure intensifier, until the both voltages are brought into coincidence with each other. In this way, the liquid pressure as applied to the wheel cylinder is made always to response to the pedal pressure.

Abstract: In an adaptive braking system for wheeled vehicles such as automobiles a braking force attenuator and logic are provided to automatically reduce braking force if, during braking, wheel skid becomes imminent, as evidenced by power train dynamic performance with respect to certain first criteria. Subsequently, braking force is increased if power train performance satisfies certain other criteria, at which time the first criteria is altered and then allowed to return to original levels so that during the alteration period the power train dynamic performance must be more indicative of imminent wheel skid than otherwise required to reduce braking force.