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US5029466A
Expired / Lapsed
US
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System for detecting abnormality of steering angle sensor
Assignee: Honda Motor Co Ltd
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Filing: 1990-07-12
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Granted: 1991-07-09
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Expires: 2010-07-12
Abstract
Abstract A system for detecting the abnormality of a steering angle sensor comprises a steering angle sensor for detecting the steering angle of a wheel of a vehicle to be steered, a reference motional parameter determining apparatus for determining a reference value of a vehicle motional parameter on the basis of the steering angle, a motional parameter detector apparatus for detecting a vehicle motional parameter indicative of the same physical quantity as the reference motional parameter, and an abnormality judging apparatus for judging the abnormality of the steering angle sensor by use of the reference motional parameter and the vehicle motional parameter. It is possible to reliably and promptly detect the abnormality of the steering angle sensor. Further, abnormality judging conditions are stabilized by a delaying timer adapted to start the judgement by the abnormality judging apparatus at a given interval after satisfaction of the abnormality judging conditions, and this contributes to a further correct judgement.
Inventors
- 👤 Takashi Nishihara
- 👤 Makoto Sato
- 👤 Hironobu Kiryu
- 👤 Yukihisa Ishii
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:20
CPC Classifications
B; B62; B62D; B62D5/00; B62D5/04; B62D5/0457; B62D5/0481; B62D5/049; B62D15/00; B62D15/02; B62D15/021
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
103 words
A system for detecting the abnormality of a steering angle sensor, comprising a steering angle sensor for detecting the steering angle of a wheel of a vehicle to be steered, a reference motional parameter determining means for determining a reference value of a vehicle motional parameter on the basis of said steering angle, a motional parameter detector means for detecting a vehicle motional parameter indicative of a physical quantity equal to that of said reference motional parameter, and an abnormality judging apparatus for judging the abnormality of said steering angle sensor by use of said reference motional parameter and said vehicle motional parameter.
Claim 2
Independent Claim
103 words
A system for detecting the abnormality of a steering angle sensor, comprising a steering angle sensor for detecting the steering angle of a wheel of a vehicle to be steered, a reference motional parameter determining means for determining a reference value of a vehicle motional parameter on the basis of said steering angle, a motional parameter detector means for detecting a vehicle motional parameter indicative of a physical quantity equal to that of said reference motional parameter, and an abnormality judging apparatus for judging the abnormality of said steering angle sensor by use of said reference motional parameter and said vehicle motional parameter.
Claim 3
Dependent Claim
114 words
A system for detecting the abnormality of a steering angle sensor according to claim 1, wherein said abnormality judging apparatus comprises a reference motional parameter deviation calculating means for calculating a deviation between maximum and minimum values of said reference motional parameter within a predetermined time, a vehicle motional parameter deviation calculating means for calculating a deviation between maximum and minimum values of said vehicle motional parameter within a predetermined time, and a comparator means adapted to produce a signal indicative of the steering angle sensor being abnormal, when a difference between the deviations obtained by said reference motional parameter and the vehicle motional parameter is equal to or larger than a predetermined value.
Claim 4
Dependent Claim
80 words
A system for detecting the abnormality of a steering angle sensor according to claim 1 or 2, further including a check-start judging apparatus operable to permit the abnormality judging apparatus to perform a judgment while operating conditions for said abnormality judging apparatus are satisfied, and a delaying timer operable to start a judgement operation of the abnormality judging apparatus at a predetermined interval from an instant when said check-start judging apparatus has decided that the operating conditions have been satisfied.
Claim 5
Dependent Claim
95 words
A system for detecting the abnormality of a steering angle sensor according to claim 3, wherein said check-start judging apparatus includes a first judging means for judging that at least said vehicle motional parameter is not too large, a second judging means for judging that said steering angle sensor shows a value equal to or less than a predetemined steering angle, and a travel judging means for judging that the vehicle is travelling, so that said check-start judging apparatus decides that the operating conditions are satisfied, when all of said judging means provide affirmative decisions.
Claim 6
Dependent Claim
114 words
A system for detecting the abnormality of a steering angle sensor according to claim 4, wherein said vehicle motional parameter is detected using a difference between velocities of left and right wheels of the vehicle, and said check-start judging apparatus further includes a wheel velocity sensor normality judging means for judging that each sensor for detecting each wheel velocity is normally operative, a brake judging means for judging that the wheel is in a nonbraked state, and a third judging means for judging that the vehicle is travelling on a good road, so that the checkstart judging apparatus decides that the operating conditions are satisfied, when all of said judging means provide affirmative decisions.
Claim 7
Dependent Claim
55 words
A system for detecting the abnormality of a steering angle sensor according to claim 5, wherein said check-start judging apparatus further includes a steering angle repose-state judging apparatus for judging that the steering angle detected by the steering angle sensor is substantially constant, after a decision that all of said judging means provide affirmative decisions.
Claim 8
Independent Claim
119 words
A system for detecting the abnormality of a steering angle sensor, comprising a steering angle sensor for detecting the steering angle of a wheel of a vehicle to be steered, a motional parameter detector means for detecting a motional parameter indicative of a turning motion of the vehicle, an abnormality judging apparatus for judging the abnormality of the steering angle sensor by use of said steering angle and said motional parameter, and a delaying means for starting the judgement of the abnormality of the steering angle sensor by said abnormality judging apparatus at a predetermined interval after detection of the repose state of said steering angle, and continuing the execution of the judgement during continuation of the repose state.
Claim 9
Independent Claim
119 words
A system for detecting the abnormality of a steering angle sensor, comprising a steering angle sensor for detecting the steering angle of a wheel of a vehicle to be steered, a motional parameter detector means for detecting a motional parameter indicative of a turning motion of the vehicle, an abnormality judging apparatus for judging the abnormality of the steering angle sensor by use of said steering angle and said motional parameter, and a delaying means for starting the judgement of the abnormality of the steering angle sensor by said abnormality judging apparatus at a predetermined interval after detection of the repose state of said steering angle, and continuing the execution of the judgement during continuation of the repose state.
References Cited (Backward Citations)
US4924696A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-07-08 | 1995-01-07 | 1995-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-08 | 1999-01-07 | 1999-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-08 | 2003-01-07 | 2003-07-09 | $7700.00 | Window Closed / Lapsed |