US3852613A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangement to test the operation of an antiskid system
Assignee: TDK Micronas GmbH
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Filing: 1973-08-23
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Granted: 1974-12-03
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Expires: 1993-08-23
Abstract
Abstract This relates to an arrangement to test the operation of an antiskid system contained in a vehicle upon starting the engine of the vehicle but prior to the movement thereof. The arrangement includes a test circuit activated by the ignition key to test the electronic and hydraulic components of an antiskid system through an entire antiskid control cycle. In addition the arrangement includes a logic circuit to disable the testing of the antiskid system if the parking brake is not set, or if the automatic transmission gear select is not in the park position, or if the brake pedal or the hydraulic brake system is activated. This will prevent the vehicle from rolling particularly when parked on a hill, since during an antiskid control cycle the hydraulic brake system is rendered inoperative.
Inventors
- 👤 F Wienecke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:00
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/32; B60T8/88; B60T8/885; B60T2270/00; B60T2270/40; B60T2270/406
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
166 words
An arrangement to test the operation of an antiskid control system contained in a motor vehicle prior to moving the vehicle comprising: a hydraulic brake system having stop lights; a parking brake; an automatic transmission gear selector having a park position; an ignition switch; an antiskid control system having an electronic control circuit and a hydraulic control device; a testing circuit actuated by said ignition sWitch to produce a testing signal to cause said electronic control circuit and said hydraulic device to go through one entire cycle of antiskid operation; and a circuit arrangement coupled between said electronic control circuit and said testing circuit and to said hydraulic brake system, said parking brake and said gear selector to enable said testing signal to be coupled to said electronic control circuit only upon occurrence of one or more of any of the following conditions; said hydraulic brake system being inoperative, said parking brake being operative, and said automatic transmission gear selector being set to said park position.
Claim 2
Dependent Claim
166 words
An arrangement to test the operation of an antiskid control system contained in a motor vehicle prior to moving the vehicle comprising: a hydraulic brake system having stop lights; a parking brake; an automatic transmission gear selector having a park position; an ignition switch; an antiskid control system having an electronic control circuit and a hydraulic control device; a testing circuit actuated by said ignition sWitch to produce a testing signal to cause said electronic control circuit and said hydraulic device to go through one entire cycle of antiskid operation; and a circuit arrangement coupled between said electronic control circuit and said testing circuit and to said hydraulic brake system, said parking brake and said gear selector to enable said testing signal to be coupled to said electronic control circuit only upon occurrence of one or more of any of the following conditions; said hydraulic brake system being inoperative, said parking brake being operative, and said automatic transmission gear selector being set to said park position.
Claim 3
Dependent Claim
63 words
An arrangement according to claim 1, wherein said circuit arrangement includes a two input AND gate having one input coupled to the output of said testing circuit and an output coupled to a test input of said electronic control circuit; and circuit means to provide a logic high on the other input of said AND gate upon occurrence of an operative parking brake.
Claim 4
Dependent Claim
46 words
An arrangement according to claim 2, wherein said circuit means includes a not gate having its output coupled to said other input of said AND gate, and means to connect ground potential to the input of said NOT gate upon occurrence of an operative parking brake.
Claim 5
Dependent Claim
66 words
An arrangement according to claim 1, wherein said circuit arrangement includes a two input AND gate having one input coupled to the output of said testing circuit and an output coupled to a test input of said electronic control circuit; and circuit means to provide a logic high on the other input of said AND gate when said gear selector is set to said park position.
Claim 6
Dependent Claim
49 words
An arrangement according to claim 4, wherein said circuit means includes a NOT gate having its output coupled to said other input of said AND gate, and means to connect ground potential to the input of said NOT gate when said gear selector is set to said park position.
Claim 7
Dependent Claim
72 words
An arrangement according to claim 1, wherein said circuit arrangement includes a two input AND gate having one input coupled to the output of said testing circuit and an output coupled to a test input of said electronic control circuit; and circuit means coupled to said stop lights of said vehicle to provide a logic high on the other input of said AND gate upon occurrence of an inoperative hydraulic brake system.
Claim 8
Dependent Claim
46 words
An arrangement according to claim 6, wherein said circuit means includes a relay connected in parallel to said stop lights, said relay having a contact coupled to said other input of said AND gate to provide said logic high thereon when said relay is not energized.
Claim 9
Dependent Claim
46 words
An arrangement according to claim 7, wherein said circuit means further includes a NOT gate having its output coupled to said other input of said AND gate and its input coupled to ground potential by said control of said relay when said relay is not energized.
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) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |