US3759582A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fault detecting system for vehicle anti-skid control systems
Assignee: Denso Corp
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Filing: 1971-08-17
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Granted: 1973-09-18
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Expires: 1991-08-17
Abstract
Abstract A fault detecting system for detecting faults in an anti-skid control system for vehicles which system prevents the loss of steering capacity, the abnormal spinning of the vehicle body and the like due to the locking of the wheel which occurs when an excessively large braking pressure is applied rapidly to a vehicle such as an automobile.
Inventors
- 👤 J Ohta
- 👤 A Okamoto
- 👤 A Sugiura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:39
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/32; B60T8/88; B60T8/885; B60T17/00; B60T17/18; B60T17/22; B60T8/92; B60T8/96
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
183 words
A fault detecting system for vehicle anti-skid control systems comprising: a braking pressure control circuit for detecting a tendency for the wheel to lock and the locking of the wheel to generate an electrical signal for reducing the braking pressure applied to the wheel, a braking pressure modulator which is energized by the output signal from said braking pressure control circuit to reduce the braking pressure applied to the wheel, an actuation detector for detecting the actuation of said braking pressure modulator to generate an electrical signal, a first logical means connected to produce a signal when at least one of said actuation detector and said braking pressure control circuit produces a signal, a second logical means connected to produce a signal when either said first logical means or said braking pressure control circuit produces a signal, a timer circuit for producing an output signal when the output signal from said second logical means remains on in excess of a predetermined time thereby detecting a fault in said control system, and a memory circuit for storing the output signal from said timer circuit.
Claim 2
Dependent Claim
183 words
A fault detecting system for vehicle anti-skid control systems comprising: a braking pressure control circuit for detecting a tendency for the wheel to lock and the locking of the wheel to generate an electrical signal for reducing the braking pressure applied to the wheel, a braking pressure modulator which is energized by the output signal from said braking pressure control circuit to reduce the braking pressure applied to the wheel, an actuation detector for detecting the actuation of said braking pressure modulator to generate an electrical signal, a first logical means connected to produce a signal when at least one of said actuation detector and said braking pressure control circuit produces a signal, a second logical means connected to produce a signal when either said first logical means or said braking pressure control circuit produces a signal, a timer circuit for producing an output signal when the output signal from said second logical means remains on in excess of a predetermined time thereby detecting a fault in said control system, and a memory circuit for storing the output signal from said timer circuit.
Claim 3
Dependent Claim
38 words
A fault detecting system for vehicle anti-skid control systems according to claim 1, further including control means for receiving the output signal from said memory circuit and acting to attend to the fault in an anti-skid control system.
Claim 4
Dependent Claim
33 words
A fault detecting system for vehicle anti-skid control systems according to claim 2, further including a holding circuit for holding the output signal from said braking pressure control circuit for a predetermined time.
Claim 5
Dependent Claim
36 words
A fault detecting system for vehicle anti-skid control systems according to claim 1, further including switch means for receiving the output signal from said memory circuit to disconnect said braking pressure modulator from the power source.
Claim 6
Dependent Claim
33 words
A fault detecting system for vehicle anti-skid control systems according to claim 4, further including a holding circuit for holding the output signal from said braking pressure control circuit for a predetermined time.
Claim 7
Dependent Claim
30 words
A fault detecting system for vehicle anti-skid control systems according to claim 1, further including warning means for receiving the output signal from said memory circuit to come into operation.
Claim 8
Dependent Claim
33 words
A fault detecting system for vehicle anti-skid control system according to claim 6, further including a holding circuit for holding the output signal from said braking pressure control circuit for a predetermined time.
Claim 9
Dependent Claim
33 words
A fault detecting system for vehicle anti-skid control systems according to claim 1, further including a holding circuit for holding thE output signal from said braking pressure control circuit for a predetermined time.
Claim 10
Dependent Claim
197 words
A fault detecting system for vehicle anti-skid control systems comprising a braking pressure control circuit for detecting a tendency for the wheel to lock and the locking of the wheel to generate an electrical signal for reducing the braking pressure applied to the wheel, a braking pressure modulator which is energized by the output signal from said braking pressure control circuit to reduce the braking pressure applied to the wheel, a holding circuit for holding the output signal from said braking pressure control circuit for a predetermined time, an actuation detector for detecting the actuation of said braking pressure modulator to produce an electrical signal, a first logical element for forming the exclusive logical sum of the output signal from said holding circuit and the output signal from said actuation detector, a second logical element for forming the logical sum of the output signal from said first logical element and the output signal from said braking pressure control circuit, a timer circuit for generating an output signal when the output signal from said second logical element remains on in excess of a predetermined time, and a memory circuit for storing the output signal from said timer circuit.
Claim 11
Dependent Claim
197 words
A fault detecting system for vehicle anti-skid control systems comprising a braking pressure control circuit for detecting a tendency for the wheel to lock and the locking of the wheel to generate an electrical signal for reducing the braking pressure applied to the wheel, a braking pressure modulator which is energized by the output signal from said braking pressure control circuit to reduce the braking pressure applied to the wheel, a holding circuit for holding the output signal from said braking pressure control circuit for a predetermined time, an actuation detector for detecting the actuation of said braking pressure modulator to produce an electrical signal, a first logical element for forming the exclusive logical sum of the output signal from said holding circuit and the output signal from said actuation detector, a second logical element for forming the logical sum of the output signal from said first logical element and the output signal from said braking pressure control circuit, a timer circuit for generating an output signal when the output signal from said second logical element remains on in excess of a predetermined time, and a memory circuit for storing the output signal from said timer circuit.
Claim 12
Dependent Claim
38 words
A fault detecting system for vehicle anti-skid control systems according to claim 9, further including control means for receiving the output signal from said memory circuit and acting to attend to the fault in an anti-skid control system.
Claim 13
Dependent Claim
36 words
A fault detecting system for vehicle anti-skid control systems according to claim 9, further including switch means for receiving the output signal from said memory circuit to disconnect said braking pressure modulator from the power source.
Claim 14
Dependent Claim
30 words
A fault detecting system for vehicle anti-skid control systems according to claim 9, further including warning means for receiving the output signal from said memory circuit to come into operation.
Claim 15
Dependent Claim
173 words
A fault detecting system for vehicle anti-skid control systems comprising a braking pressure control circuit for detecting a tendency for the wheel to lock and the locking of the wheel to generate an electrical signal for reducing the braking pressure applied to the wheel, a braking pressure modulator which is energized by the output signal from said braking pressure control circuit to reduce the braking pressure applied to the wheel, an actuation detector which cooperates with the braking pressure modulator for detecting the actuation of said braking pressure modulator and for generating an electrical signal in response thereto, logic circuit means connected to receive input signals from said actuation detector and said pressure control circuit for producing an output signal indicative of any malfunction of said braking pressure control circuit and said braking pressure modulator, a timer circuit for producing an output signal when the output signal from said logic circuit means remains on in excess of a predetermined time, and a memory circuit for storing the output signal from said timer circuit.
Claim 16
Dependent Claim
173 words
A fault detecting system for vehicle anti-skid control systems comprising a braking pressure control circuit for detecting a tendency for the wheel to lock and the locking of the wheel to generate an electrical signal for reducing the braking pressure applied to the wheel, a braking pressure modulator which is energized by the output signal from said braking pressure control circuit to reduce the braking pressure applied to the wheel, an actuation detector which cooperates with the braking pressure modulator for detecting the actuation of said braking pressure modulator and for generating an electrical signal in response thereto, logic circuit means connected to receive input signals from said actuation detector and said pressure control circuit for producing an output signal indicative of any malfunction of said braking pressure control circuit and said braking pressure modulator, a timer circuit for producing an output signal when the output signal from said logic circuit means remains on in excess of a predetermined time, and a memory circuit for storing the output signal from said timer circuit.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |