US3829167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic deceleration control system
Assignee: ENHANCED TECHNOLOGY ASSOCIATES Inc A CORP OF NY
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Filing: 1972-11-21
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Granted: 1974-08-13
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Expires: 1992-11-21
Abstract
Abstract Disclosed is a unique automatic deceleration control system of such a nature that it may be instantaneously interrupted by antiskid control circuitry when adverse conditions exist and instantaneously restored to operation when such adverse conditions cease. A comparator circuit emits an output indicative of the comparison between the actual deceleration of the vehicle and a preselected desired rate of deceleration. An RC circuit receives the output of the comparator and forms ramp functions therefrom so as to achieve steady rates of application and release of brake pressure. Associated with the RC circuit is clock and initialization circuitry. The clock circuit inhibits the discharge of the capacitor of the RC circuit when adverse braking conditions exist and the initialization circuit inhibits the affect of the clock circuit when the brakes are initially placed under the control of the automatic deceleration control circuit. Also connected to the RC circuit is a current driving amplifier to provide the necessary power for controlling the brake valves of the vehicle in accordance with the output of the RC circuit.
Inventors
- 👤 E Rouf
- 👤 H Booher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:08
CPC Classifications
B; B64; B64C; B64C25/00; B64C25/32; B64C25/42; B64C25/426; B60; B60T; B60T8/00; B60T8/17; B60T8/1701; B60T8/1703
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
167 words
Circuitry for automatically controlling the deceleration of a moving vehicle having valve actuated brakes comprising: a first circuit means sensing the rate of vehicular deceleration and creating a first electrical signal proportionately related thereto; a second circuit means receiving the first electrical signal, comparing the first electrical signal with a preselected second electrical signal which is indicative of the desired rate of deceleration, and creating a third electrical signal indicative of the degree of comparison; a third circuit means to receive and shape the third electrical signal so as to create a fourth electrical signal; a fourth circuit means receiving the fourth electrical signal and controlling the application and release of brake pressure in conformance with the shape of the fourth electrical signal, the fourth circuit means providing the necessary current drive to actuate the vehicle brake valves; and a clock circuit connected to the third circuit means and limiting the value of the fourth electrical signal as the same relates to the release of brake pressure.
Claim 2
Dependent Claim
167 words
Circuitry for automatically controlling the deceleration of a moving vehicle having valve actuated brakes comprising: a first circuit means sensing the rate of vehicular deceleration and creating a first electrical signal proportionately related thereto; a second circuit means receiving the first electrical signal, comparing the first electrical signal with a preselected second electrical signal which is indicative of the desired rate of deceleration, and creating a third electrical signal indicative of the degree of comparison; a third circuit means to receive and shape the third electrical signal so as to create a fourth electrical signal; a fourth circuit means receiving the fourth electrical signal and controlling the application and release of brake pressure in conformance with the shape of the fourth electrical signal, the fourth circuit means providing the necessary current drive to actuate the vehicle brake valves; and a clock circuit connected to the third circuit means and limiting the value of the fourth electrical signal as the same relates to the release of brake pressure.
Claim 3
Dependent Claim
23 words
The circuit according to claim 1 wherein the first circuit means comprises a linear decelerometer which feeds into a scaling and buffering amplifier.
Claim 4
Dependent Claim
57 words
The circuit according to claim 2 wherein the second circuit means comprises a comparator circuit, the preselected second electrical signal is a D.C. level created by a voltage divider, and the third electrical signal is a bi-state signal, the state of which is indicative of the relative values of the first electrical signal and the D.C. level.
Claim 5
Dependent Claim
39 words
The circuit according to claim 3 wherein the third circuit means comprises a resistor series connected with a capacitor such that the switching of the bi-state third electrical signal is caused to form positive and negative ramp voltage functions.
Claim 6
Dependent Claim
19 words
The circuit according to claim 4 wherein the fourth electrial circuit is a current amplifier having unity voltage gain.
Claim 7
Dependent Claim
38 words
The circuit according to claim 1 which further includes an initialization circuit which interrelates with the clock circuit so as to inhibit the functioning of the clock circuit during the period of the first release of brake pressure.
Claim 8
Dependent Claim
49 words
The apparatus according to claim 1 which further includes anti-skid control circuitry associated with the valve actuated brakes such that the control of the braking of the vehicle by the anti-skid control circuitry and the control of the braking by the circuitry for automatically controlling deceleration are mutually exclusive.
Claim 9
Dependent Claim
34 words
The apparatus according to claim 1 which further includes means for the smooth release of control of the circuitry for automatically controlling deceleration so as to provide a gradual total release of brake pressure.
Claim 10
Dependent Claim
34 words
The apparatus according to claim 1 which further includes means for the instantaneous release of control of the circuitry for automatically controlling decleration so as to provide an instantaneous release of all brake pressure.
Claim 11
Dependent Claim
158 words
Circuitry providing the automatic control of the deceleration of a moving vehicle having valve actuated brakes which cOmprises: a linear decelerometer sensing the deceleration of the vehicle as a whole and creating an electrical signal relative thereto; a scaling and buffering amplifier receiving the electrical signal from the linear decelerometer and amplifying the electrical signal to a predetermined proportionate amplitude; a comparator circuit reueiving the amplified electrical signal, comparing that original with a preselected electrical signal which is indicative of the desired rate of deceleration, and creating an output signal corresponding to the results of the comparison; an integrator circuit receiving the output of the comparator circuit and integrating that output with respect to time; a clock circuit connected to the integrator circuit for inhibiting the operation of the integrator circuit when certain predetermined conditions are existent; and a current amplifier receiving the integrated signal and causing that signal to affect the various brake valves of the vehicle.
Claim 12
Dependent Claim
158 words
Circuitry providing the automatic control of the deceleration of a moving vehicle having valve actuated brakes which cOmprises: a linear decelerometer sensing the deceleration of the vehicle as a whole and creating an electrical signal relative thereto; a scaling and buffering amplifier receiving the electrical signal from the linear decelerometer and amplifying the electrical signal to a predetermined proportionate amplitude; a comparator circuit reueiving the amplified electrical signal, comparing that original with a preselected electrical signal which is indicative of the desired rate of deceleration, and creating an output signal corresponding to the results of the comparison; an integrator circuit receiving the output of the comparator circuit and integrating that output with respect to time; a clock circuit connected to the integrator circuit for inhibiting the operation of the integrator circuit when certain predetermined conditions are existent; and a current amplifier receiving the integrated signal and causing that signal to affect the various brake valves of the vehicle.
Claim 13
Dependent Claim
29 words
The circuitry of claim 10 wherein the preselected electrical signal is created by means of a voltage divider network which utilizes a potentiometer for varying the preselected electrical signal.
Claim 14
Dependent Claim
28 words
The circuitry of claim 10 wherein the clock circuit comprises a resistive-capacitive timing circuit feeding a comparator circuit the output of which controls a solid state switching element.
Claim 15
Dependent Claim
24 words
The circuitry of claim 10 which further includes initialization circuitry operative to selectively inhibit the effect of the clock circuit upon the integrator circuit.
Claim 16
Dependent Claim
13 words
The circuitry of claim 13 wherein the initialization circuitry comprises a latch circuit.
Claim 17
Dependent Claim
66 words
The circuitry of claim 10 which includes at least one anti-skid control circuit associated with the vehicle brake valves, the anti-skid control circuits being mutually independent of each other and interacting with the current amplifier in such a manner as to be capable, in predetermined instances, of overriding the effect of the current amplifier upon the brake valves with which the anti-skid control circuits are associated.
Claim 18
Dependent Claim
21 words
The circuitry of claim 10 which includes means of gradually releasing the application of brake pressure by biasing the comparator circuit.
Claim 19
Dependent Claim
45 words
The circuitry of claim 10 which includes means of instantaneously releasing and applying the integrated signal from the current amplifier to the brake valves such that when the integrated signal is released the circuitry continues to function in response to signals from the linear decelerometer.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |