Anti-skid control system

Claim 2

An anti-skid system for a vehicle having a wheel and means for accelerating the wheel, comprising wheel velocity generating means for generating a velocity signal corresponding to the velocity of the wheel, reference means responsive to said generating means for establishing a reference signal that corresponds to the velocity of the wheel and increases at a predetermined rate when the wheel velocity signal exceeds the predetermined rate, and comparator means responsive to said generating means and said reference means for generating a comparison signal corresponding to the comparison of the reference signal and the velocity signal, and control means connected to the means for accelerating the wheel for controlling the wheel velocity in accordance with the comparison signal, said control means including oscillating means, inhibiting means responsive to said comparator means for turning said oscillating means on in response to a comparison signal that indicates that the velocity signal exceeds the reference signal and turning it off at other times, and regulator means connected to the means for accelerating the wheel for intermittently interrupting the acceleration on the basis of said oscillator means.

Claim 3

A system as in claim 1, wherein said oscillator means includes a free-running multivibrator having an output that reverses according to a predetermined time ratio.

Claim 4

A system as in claim 2, wherein said control means includes means for interrupting operation of an ignition coil.

Claim 5

A system as in claim 2, wherein said control means includes a unit for interrupting the fuel system of an engine.

Claim 6

A system as in claim 1, wherein said reference means includes integrating means for establishing the reference signal and causing it to rise at the predetermined rate, said reference means further including differential circuit means responsive to the reference signal and the velocity signal for producing a differential signal and lowering the reference signal to the value of the velocity signal when the velocity signal is less than the rising reference signal.

Claim 7

A system as in claim 5, wherein said control means includes means for interrupting operation of an ignition coil.

Claim 8

A system as in claim 5, wherein said control means includes a unit for interrupting the fuel supply of an engine.

Claim 9

A system as in claim 5, wherein said integrating means includes an operational integrator and wherein said differential circuit means includes a differential operational amplifier having an output connected to the input of said operational integrator, said output including a diode.

Claim 10

A system as in claim 8, wherein said control means includes means for interrupting operation of an ignition coil.

Claim 11

A system as in claim 8, wherein said control means includes a unit for interrupting the fuel supply of an engine.

Claim 12

A system as in claim 2, wherein said reference means includes integrating means for establishing the reference signal and causing it to rise at the predetermined rate, said reference means further including differential circuit means responsive to the reference signal and the velocity signal for producing a differential signal and lowering the reference signal to the value of the velocity signal when the velocity signal is less than the rising reference signal.

Claim 13

A system as in claim 11, wherein said integrating means includes an operational integrator and wherein said differential circuit means includes a differential operational amplifier having an output connected to the input of said operational integrator, said output including a diode.

Claim 14

A system as in claim 12, wherein said control means includes means for interrupting operation of an ignition coil.

Claim 15

A system as in claim 12, wherein said control means includes a unit for interrupting the fuel supply of an engine.

Claim 16

A system as in claim 11, wherein said control means includes means for interrupting operation of an ignition coil.

Claim 17

A system as in claim 11, wherein said control means includes a unit for interrupting the fuel supply of an engine.

Claim 18

A system as in claim 1, wherein said control means includes means for interrupting operation of an ignition coil.

Claim 19

A system as in claim 1, wherein said control means includes a unit for interrupting the fuel supply of an engine.

Claim 20

An anti-skid system for a vehicle having a wheel and means for accelerating the wheel, comprising reference means for generating a reference velocity signal rising at a predetermined rate, comparison means responsive to said reference means and the wheel for comparing the velocity of the wheel with the reference velocity and for lowering the reference signal to the wheel velocity when the wheel velocity is lower than the reference velocity, and means responsive to said comparison means for inhibiting the operation of the means to accelerate the wheel, said control means including oscillating means, inhibiting means responsive to said comparator means for turning said oscillating means on in response to a comparison signal that indicates that the velocity signal exceeds the reference signal and turning it off at other times, and regulator means connected to the means for accelerating the wheel for intermittently interrupting the acceleration on the basis of said oscillator means.

Claim 21

An anti-skid system for a vehicle having a wheel and means for accelerating the wheel, comprising reference means for generating a reference velocity signal rising at a predetermined rate, comparison means responsive to said reference means and the wheel for comparing the velocity of the wheel with the reference velocity and for lowering the reference signal to the wheel velocity when the wheel velocity is lower than the reference velocity, and means responsive to said comparison means for inhibiting the operation of the means to accelerate the wheel, said control means including oscillating means, inhibiting means responsive to said comparator means for turning said oscillating means on in response to a comparison signal that indicates that the velocity signal exceeds the reference signal and turning it off at other times, and regulator means connected to the means for accelerating the wheel for intermittently interrupting the acceleration on the basis of said oscillator means.

Claim 22

A system as in claim 19, wherein said oscillator means includes a free-running multivibrator having an output that reverses according to a predetermined time ratio.

Claim 23

A system as in claim 19, wherein said reference means includes integrating means for establishing the reference signal and causing it to rise at the predetermined rate, said reference means further including differential circuit means responsive to the reference signal and the velocity signal for producing a differential signal and lowering the reference signal to the value of the velocity signal when the velocity signal is less than the rising reference signal.

Claim 24

A system as in claim 19, wherein said integrating means includes an operational integrator and wherein said differential circuit means includes a differential operational amplifier having an output connected to the input of said operational integrator, said output including a diode.

Claim 25

A system as in claim 20, wherein said reference means includes integrating means for establishing the reference signal and causing it to rise at the predetermined rate, said reference means further including differential circuit means responsive to the reference signal and the velocity signal for producing a differential signal and lowering the reference signal to the value of the velocity signal when the velocity signal is less than the rising reference signal.

Claim 26

A system as in claim 20 wherein said integrating means includes an operational integrator and wherein said differential circuit means includes a differential operational amplifier having an output connected to the input of said operational integrator, said output including a diode, said reference means includes integrating means for establishing the reference signal and causing it to rise at the predetermined rate, said reference means further including differential circuit means responsive to the reference signal at the velocity signal for producing a differential signal and lowering the reference signal to the value of the velocity signal when the velocity signal is less than the rising reference signal.

Claim 27

A system as in claim 20, wherein said integrating means includes an operational integrator and wherein said differential circuit means includes a differential operational amplifier having an output connected to the input of said operational integrator, said output including a diode.

Claim 28

A system as in claim 19, wherein said control means includes means for in terrupting operation of an ignition coil.

Claim 29

A system as in claim 19, wherein said control means includes a unit for interrupting the fuel supply of an engine.

Claim 30

A vehicle comprising an engine, wheels, accelerating means for accelerating the velocity of the wheel, reference means for establishing a velocity reference signal that rises at a predetermined value, comparison means for comparing the velocity of one of said wheels with the reference velocity and for lowering the reference velocity to the value of the wheel velocity, and control means responsive to said comparison means for regulating said accelerating means so as to slow the wheel velocity when the wheel velocity is rising faster than the reference velocity, said control means including oscillating means, inhibiting means responsive to said comparator means for turning said oscillating means on in response to a comparison signal that indicates that the velocity signal exceeds the reference signal and turning it off at other times, and regulator means connected to the means for accelerating the wheel for intermittently interrupting the acceleration on the basis of said oscillator means.

Claim 31

A vehicle comprising an engine, wheels, accelerating means for accelerating the velocity of the wheel, reference means for establishing a velocity reference signal that rises at a predetermined value, comparison means for comparing the velocity of one of said wheels with the reference velocity and for lowering the reference velocity to the value of the wheel velocity, and control means responsive to said comparison means for regulating said accelerating means so as to slow the wheel velocity when the wheel velocity is rising faster than the reference velocity, said control means including oscillating means, inhibiting means responsive to said comparator means for turning said oscillating means on in response to a comparison signal that indicates that the velocity signal exceeds the reference signal and turning it off at other times, and regulator means connected to the means for accelerating the wheel for intermittently interrupting the acceleration on the basis of said oscillator means.

Claim 32

A system as in claim 28, wherein said oscillator means includes a free-running multivibrator having an output that reverses according to a predetermined time ratio.

Claim 33

A system as in claim 29, wherein said reference means includes integrating means for establishing the reference signal and causing it to rise at the predetermined rate, said reference means further including differential circuit means responsive to the reference signal and the velocity signal for producing a differential signal and lowering the reference signal to the value of the velocity signal when the velocity signal is less than the rising reference signal.

Claim 34

A system as in claim 29 wherein said integrating means includes an operational integrator and wherein said differential circuit means includes a differential operational amplifier having an output connected to the input of said operational integrator, said output including a diode, said reference means includes integrating means for establishing the reference signal and causing it to rise at the predetermined rate, said reference means further including differential circuit means responsive to the reference signal and the velocity signal for producing a differential signal and lowering the reference signal to the value of the velocity signal when the velocity signal is less than the rising reference signal.

Claim 35

A system as in claim 29, wherein said integrating means includes an operational integrator and wherein said differential circuit means includes a differential operational amplifier having an output connected to the input of said operational integrator, said output including a diode.

Claim 36

A system as in claim 28, wherein said reference means includes integrating means for establishing the reference signal and causing it to rise at the predetermined rate, said reference means further including differential circuit means responsive to the reference signal and the velocity signal for producing a differential signal and lowering the reference signal to the value of the velocity signal when the velocity signal is less than the rising reference signal.

Claim 37

A system as in claim 28, wherein said integrating means includes an operational integrator and wherein said differential circuit means includes a differential operational amplifier having an output connected to the input of said operational integrator, said output including a diode.

Claim 38

A vehicle comprising an engine, at least one wheel responsive to the engine, accelerator means for causing said engine to accelerate the velocity of the wheel, wheel velocity generating means responsive to the rotation of the wheel for generating a velocity signal corresponding to the velocity of the wheel, reference means responsive to said generating means for establishiNg a reference signal that corresponds to the velocity of the wheel and increases at a predetermined rate when the wheel velocity signal exceeds the predetermined rate, and comparator means responsive to said generating means and said reference means for generating a comparison signal when the velocity signal rises at a rate faster than the reference signal, and control means connected to the accelerating means for slowing the wheel velocity so that it increases at a rate up to the increase of the reference signal, said control means including oscillating means, inhibiting means responsive to said comparator means for turning said oscillating means on in response to a comparison signal that indicates that the velocity signal exceeds the reference signal and turning it off at other times, and regulator means connected to the means for accelerating the wheel for intermittently interrupting the acceleration on the basis of said oscillator means.

Claim 39

A vehicle comprising an engine, at least one wheel responsive to the engine, accelerator means for causing said engine to accelerate the velocity of the wheel, wheel velocity generating means responsive to the rotation of the wheel for generating a velocity signal corresponding to the velocity of the wheel, reference means responsive to said generating means for establishiNg a reference signal that corresponds to the velocity of the wheel and increases at a predetermined rate when the wheel velocity signal exceeds the predetermined rate, and comparator means responsive to said generating means and said reference means for generating a comparison signal when the velocity signal rises at a rate faster than the reference signal, and control means connected to the accelerating means for slowing the wheel velocity so that it increases at a rate up to the increase of the reference signal, said control means including oscillating means, inhibiting means responsive to said comparator means for turning said oscillating means on in response to a comparison signal that indicates that the velocity signal exceeds the reference signal and turning it off at other times, and regulator means connected to the means for accelerating the wheel for intermittently interrupting the acceleration on the basis of said oscillator means.

Claim 40

A system as in claim 35, wherein said oscillator means includes a free-running multivibrator having an output that reverses according to a predetermined time ratio.

Claim 41

A system as in claim 35, wherein said reference means includes integrating means for establishing the reference signal and causing it to rise at the predetermined rate, said reference means further including differential circuit means responsive to the reference signal and the velocity signal for producing a differential signal and lowering the reference signal to the value of the velocity signal when the velocity signal is less than the rising reference signal.

Claim 42

A system as in claim 35, wherein said integrating means includes an operational integrator and wherein said differential circuit means includes a differential operational amplifier having an output connected to the input of said operational integrator, said output including a diode.

Claim 43

A system as in claim 35, wherein said reference means includes integrating means for establishing the reference signal and causing it to rise at the predetermined rate, said reference means further including differential circuit means responsive to the reference signal and the velocity signal for producing a differential signal and lowering the reference signal to the value of the velocity signal when the velocity signal is less than the rising reference signal.

Claim 44

A system as in claim 35, wherein said integrating means includes an operational integrator and wherein said differential circuit means includes a differential operational amplifier having an output connected to the input of said operational integrator, said output including a diode, said reference means includes integrating means for establishing the reference signal and causing it to rise at the predetermined rate, said reference means further including differential circuit means responsive to the reference signal and the velocity signal for producing a differential signal and lowering the reference signal to the value of the velocity signal when the velocity signal is less than the rising reference signal.

Claim 45

A system as in claim 35, wherein said control means includes means for interrupting operation of an ignition coil.

Claim 46

A system as in claim 35 wherein said control means includes a unit for interrupting the fuel supply of an engine.