Abstract An antiskid device with clutch releasing means comprising a wheel speed-detection circuit adapted to convert the speed of a wheel into a DC voltage and provide a wheel speed voltage from said DC voltage, a reference wheel speed-establishing circuit adapted to store said DC voltage across a capacitor and discharge the stored charge in the capacitor with a time constant corresponding to a predetermined wheel deceleration to thereby produce a reference wheel speed, a circuit for comparing the wheel speed voltage from the wheel speed-detection circuit and the terminal voltage of said capacitor representing the reference wheel speed voltage from the reference wheel speed-establishing circuit to thereby detect the wheel deceleration, a relay circuit adapted to be actuated by the output from said comparator circuit to energize a braking force releasing solenoid valve, an AND circuit adapted to perform a logical operation on the output signal from the relay circuit and a signal produced by the opening and closing of a brake switch, a switch element actuated by the output from the AND circuit to energize a clutch-releasing solenoid, a holding circuit adapted for actuation upon the closing of said switch element to maintain the continued energization of the clutch-releasing solenoid even after the output from said AND circuit has ceased to exist, and a switch element to force the operation of the holding circuit to stop, whereby, as the deceleration of the wheels approaches a preset wheel deceleration, the braking force applied to the vehicle is intermittently released and simultaneously the clutch is released to uncouple the wheels and the engine such that the rotation of the wheels may be readily restarted, even on road surfaces, such as, a snowy frozen road surface where the friction coefficient between the wheel and the road is small, thereby effectively preventing the vehicle from skidding with locked wheels.
An antiskid device with clutch-releasing means comprising a wheel detection circuit adapted to convert the speed of a wheel into a DC voltage and produce a wheel speed voltage from said DC voltage, a reference wheel speed-establishing circuit adapted to store said DC voltage across a capacitor and discharge the stored charge in said capacitor with a time constant corresponding to a predetermined wheel deceleration to produce a reference wheel speed, a circuit for comparing the wheel speed voltage from said wheel speed-detection circuit and the terminal voltage of said capacitor representing the reference wheel speed voltage from said reference wheel speed-establishing circuit to detect the wheel deceleration, a relay circuit actuated by the output from said comparing circuit to energize a braking force releasing solenoid valve, an AND circuit adapted to perform a logical operation on the signal from said relay circuit and the signal produced by the opening and closing of a brake switch, a switch element adapted to energize a clutch-releasing solenoid by the output from said AND circuit, a holding circuit adapted to be actuated by the closing of said switch element to maintain the continued energization of said clutch-releasing solenoid even after the output from said AND circuit has ceased to exist, and a switch element to force the operation of said holding circuit to cease.
Claim 2
Dependent Claim
221 words
An antiskid device with clutch-releasing means comprising a wheel detection circuit adapted to convert the speed of a wheel into a DC voltage and produce a wheel speed voltage from said DC voltage, a reference wheel speed-establishing circuit adapted to store said DC voltage across a capacitor and discharge the stored charge in said capacitor with a time constant corresponding to a predetermined wheel deceleration to produce a reference wheel speed, a circuit for comparing the wheel speed voltage from said wheel speed-detection circuit and the terminal voltage of said capacitor representing the reference wheel speed voltage from said reference wheel speed-establishing circuit to detect the wheel deceleration, a relay circuit actuated by the output from said comparing circuit to energize a braking force releasing solenoid valve, an AND circuit adapted to perform a logical operation on the signal from said relay circuit and the signal produced by the opening and closing of a brake switch, a switch element adapted to energize a clutch-releasing solenoid by the output from said AND circuit, a holding circuit adapted to be actuated by the closing of said switch element to maintain the continued energization of said clutch-releasing solenoid even after the output from said AND circuit has ceased to exist, and a switch element to force the operation of said holding circuit to cease.