INTERMITTENT FAULT DETECTION AND REASONING
First Claim
1. A method for diagnostic reasoning of faults appearing in a vehicle health monitoring system (VHM), comprising:
- identifying alternatively one of a signal or a fault state change based on an input; and
if a signal is identified, querying if the signal indicts a failure mode, wherein if the signal indicts the failure mode;
setting an intermittent watch flag for the failure mode,incrementing a count representing a number of occurrences of the signal as an intermittent fault,determining if the count exceeds a predetermined threshold, andif the count exceeds the predetermined threshold, determining the intermittent fault to be a permanent fault.
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Accused Products
Abstract
A method for diagnostic reasoning of faults appearing in a vehicle health monitoring system (VHM) is provided. One of alternatively a signal mode or a failure mode state is identified based on an input. If a signal is identified, the signal is queried to determine if the signal indicts a failure mode. If the signal indicts the failure mode, an intermittent watch flag is set for the failure mode. A count representing a number of occurrences of the signal as an intermittent fault is incremented. It is determined if the count exceeds a predetermined threshold. If the count exceeds the predetermined threshold, the intermittent fault is determined to be a permanent fault.
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Citations
20 Claims
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1. A method for diagnostic reasoning of faults appearing in a vehicle health monitoring system (VHM), comprising:
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identifying alternatively one of a signal or a fault state change based on an input; and if a signal is identified, querying if the signal indicts a failure mode, wherein if the signal indicts the failure mode; setting an intermittent watch flag for the failure mode, incrementing a count representing a number of occurrences of the signal as an intermittent fault, determining if the count exceeds a predetermined threshold, and if the count exceeds the predetermined threshold, determining the intermittent fault to be a permanent fault. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system for diagnostic reasoning of faults appearing in a vehicle health monitoring system (VHM), comprising:
a diagnostic reasoner module in communication with a vehicle, wherein the diagnostic reasoner module is adapted for; identifying alternatively one of a signal or a fault state change based on an input, and if a signal is identified, querying if the signal indicts a failure mode, wherein if the signal indicts the failure mode; setting an intermittent watch flag for the failure mode, incrementing a count representing a number of occurrences of the signal as an intermittent fault, determining if the count exceeds a predetermined threshold, and if the count exceeds the predetermined threshold, determining the intermittent fault to be a permanent fault. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A computer program product for diagnostic reasoning of faults appearing in a vehicle health monitoring system (VHM), the computer program product comprising a computer-readable storage medium having computer-readable program code portions stored therein, the computer-readable program code portions comprising:
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a first executable portion for identifying alternatively one of a signal or a fault state change based on an input; and a second executable portion for if a signal is identified, querying if the signal indicts a failure mode, wherein if the signal indicts the failure mode; setting an intermittent watch flag for the failure mode, incrementing a count representing a number of occurrences of the signal as an intermittent fault, determining if the count exceeds a predetermined threshold, and if the count exceeds the predetermined threshold, determining the intermittent fault to be a permanent fault. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification