Vehicle failure diagnosis apparatus and in-vehicle terminal for vehicle failure diagnosis
First Claim
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1. A vehicle failure diagnosis apparatus, comprising:
- a storage device for storing failure patterns that are variation processes of learned values until failures of vehicle control systems in time series, the learned values being parameters used for compensation of control in the vehicle control systems to maintain the vehicle control system in an optimum control state;
a communication part;
a record receiving function for receiving records of learned values actually used in the past in the vehicle control systems of vehicles as diagnosis targets from vehicle terminals in the vehicles via the communication part;
a failure time estimating function for estimating future failure time of the vehicle control systems by comparing the received records of the learned values and the failure patterns readout from the storage device, wherein time when the learned value of the received record reaches a predetermined threshold indicating a possibility of a failure of the vehicle control systems is estimated as the future failure time on the basis of a gradient of the learned value of the failure pattern; and
an estimation result output function for supplying the estimated future failure time to the vehicle terminals.
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Abstract
In order to estimate failure times of vehicles, the invention provides a vehicle failure diagnosis apparatus which receives records of learned values actually used in the past in vehicle control systems of vehicles as diagnosis targets from in-vehicle terminals via a communication part, estimates failure time of the vehicle control systems by comparing the received records of the learned values and the failure patterns readout from a failure pattern DB, and outputs the estimated failure time to the in-vehicle terminals.
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Citations
10 Claims
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1. A vehicle failure diagnosis apparatus, comprising:
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a storage device for storing failure patterns that are variation processes of learned values until failures of vehicle control systems in time series, the learned values being parameters used for compensation of control in the vehicle control systems to maintain the vehicle control system in an optimum control state; a communication part; a record receiving function for receiving records of learned values actually used in the past in the vehicle control systems of vehicles as diagnosis targets from vehicle terminals in the vehicles via the communication part; a failure time estimating function for estimating future failure time of the vehicle control systems by comparing the received records of the learned values and the failure patterns readout from the storage device, wherein time when the learned value of the received record reaches a predetermined threshold indicating a possibility of a failure of the vehicle control systems is estimated as the future failure time on the basis of a gradient of the learned value of the failure pattern; and an estimation result output function for supplying the estimated future failure time to the vehicle terminals. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An in-vehicle terminal comprising:
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a storage device that stores failure patterns that are variation processes of the learned values until failures of vehicle control systems in time series, the learned values being parameters used for compensation of control in the vehicle control systems to maintain the vehicle control system in an optimum control state, and stores records of the learned values actually used in the past in the vehicle control systems of vehicles as diagnosis targets; a failure time estimating function for estimating future failure time of the vehicle control system of one of the vehicles that mounts the in-vehicle terminal by comparing the records of the learned values readout from the storage device with the failure patterns readout from the storage device, wherein time when the learned value of the received record reaches a predetermined threshold indicating a possibility of a failure of the vehicle control systems is estimated as the future failure time on the basis of a gradient of the learned value of the failure pattern; and an estimation result output function for externally outputting the estimated future failure time. - View Dependent Claims (8, 9)
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10. An in-vehicle terminal comprising:
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a storage device that stores estimation criteria data for estimating failure time of a vehicle control system based on changes in learned values that are parameters used for compensating control in the vehicle control system to maintain the vehicle control system in an optimum control state, and stores records of the learned values actually used in the past in the control system; a failure time estimating function for estimating future failure time of the vehicle control system on the basis of learned value changes in the records of the learned values readout from the storage device and the estimation criteria data in the storage device, and an estimation result output function for externally outputting the estimated future failure time.
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Specification