Failure diagnosing device and method for vehicular control apparatus
2 Assignments
0 Petitions
Accused Products
Abstract
A failure determination threshold value HSH used for making a failure determination for a control apparatus, for example, a lock-up clutch (26) by failure determining means (116) is corrected by failure determination threshold value correcting means (114) based on a continuation quantity qNG, for example, a duration tNG, of an operation state in which a predetermined failure precondition for the control apparatus mounted on a vehicle is satisfied. Therefore, a failure determination is performed by the failure determining means (116) using the failure determination threshold value HSH obtained in consideration of individual differences such as variations between vehicles. As a result, it is possible to prevent an erroneous determination regarding a failure, and to improve sensitivity of a failure determination.
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Citations
37 Claims
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1-20. -20. (canceled)
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21. A failure diagnosing device for a vehicular control apparatus, comprising:
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a failure determining portion that determines that a failure has occurred in the control apparatus when a continuation quantity of an operation state of the control apparatus, in which a predetermined failure precondition is satisfied, exceeds a predetermined failure determination threshold value; and
a failure determination threshold value correcting portion that corrects the failure determination threshold value based on an actual continuation quantity of the operation state;
wherein correction by the failure determination threshold value correcting portion is performed based on the continuation quantity of the operation state where the control apparatus is operating normally and the continuation quantity is smaller than the failure determination threshold value. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29)
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30. A failure diagnosing method for a vehicular control apparatus, which includes a failure determining step for determining that a failure has occurred in the control apparatus when a continuation quantity of an operation state of the control apparatus, in which a predetermined failure precondition is satisfied, exceeds a predetermined failure determination threshold value, further comprising:
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correcting the failure determination threshold value based on an actual continuation quantity of the operation state;
wherein the correction is performed based on the continuation quantity of the operation state where the control apparatus is operating normally and the continuation quantity is smaller than the failure determination threshold value. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37)
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Specification