Method for monitoring state of health of a vehicle system
First Claim
1. Method for monitoring state of health of a vehicle system of a vehicle, comprising the following steps:
- performing an end of line test on the vehicle system,measuring a plurality of parameter values for the vehicle system at different running conditions during the end of line test,storing the parameter values in a fingerprint file in a memory,measuring the same plurality of parameter values that is comprised in the fingerprint file at similar running conditions after a predefined time interval and storing the plurality of parameter values measured after the predefined time interval in an additional fingerprint file in the memory,adding a predefined ageing offset to the fingerprint file, where the ageing offset corresponds to a predicted wear of the system during the predefined time interval, thereby obtaining a time modified fingerprint file for the system, and storing the time modified fingerprint file in the memory,comparing additional fingerprint file with the time modified fingerprint file using a control system, andissuing a message if the additional fingerprint file deviate from the time modified fingerprint file.
1 Assignment
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Accused Products
Abstract
A method is provided for monitoring a state of health of a vehicle system and includes measuring a plurality of parameter values for the system at different running conditions as an end of line test, storing the parameter values in a fingerprint file, measuring the same plurality of parameter values that is comprised in the fingerprint file after a predefined time interval, adding a predefined ageing offset to the fingerprint file, where the ageing offset corresponds to a predicted wear of the system during the predefined time interval, thereby obtaining a time modified fingerprint file for the system, comparing the measured values with the time modified fingerprint file, and issuing a message if the measured values deviates from the time modified fingerprint file. The state of health can be compared with initial measurements such that the state of health of a vehicle system or component can be monitored over a longer time period.
42 Citations
19 Claims
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1. Method for monitoring state of health of a vehicle system of a vehicle, comprising the following steps:
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performing an end of line test on the vehicle system, measuring a plurality of parameter values for the vehicle system at different running conditions during the end of line test, storing the parameter values in a fingerprint file in a memory, measuring the same plurality of parameter values that is comprised in the fingerprint file at similar running conditions after a predefined time interval and storing the plurality of parameter values measured after the predefined time interval in an additional fingerprint file in the memory, adding a predefined ageing offset to the fingerprint file, where the ageing offset corresponds to a predicted wear of the system during the predefined time interval, thereby obtaining a time modified fingerprint file for the system, and storing the time modified fingerprint file in the memory, comparing additional fingerprint file with the time modified fingerprint file using a control system, and issuing a message if the additional fingerprint file deviate from the time modified fingerprint file. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A computer comprising a computer program for performing when the program is run on the computer, a method for monitoring state of health of a vehicle system of a vehicle, comprising the following steps:
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performing an end of line test on the vehicle system, measuring a plurality of parameter values for the vehicle system at different running conditions during the end of line test, storing the parameter values in a fingerprint file in a memory, measuring the same plurality of parameter values that is comprised in the fingerprint file at similar running conditions after a predefined time interval and storing the plurality of parameter values measured after the predefined time interval in an additional fingerprint file in the memory, adding a predefined ageing offset to the fingerprint file, where the ageing offset corresponds to a predicted wear of the system during the predefined time interval, thereby obtaining a time modified fingerprint file for the system, and storing the time modified fingerprint file in the memory, comparing the additional fingerprint file with the time modified fingerprint file using a control system, and issuing a message if the additional fingerprint file deviate from the time modified fingerprint file.
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19. A computer program product comprising a computer program stored on a non-transitory computer readable medium for performing, when the program product is run on a computer, a method for monitoring state of health of a vehicle system of a vehicle, the method comprising:
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performing an end of line test on the vehicle system, measuring a plurality of parameter values for the vehicle system at different running conditions during the end of line test, storing the parameter values in a fingerprint file in a memory, measuring the same plurality of parameter values that is comprised in the fingerprint file at similar running conditions after a predefined time interval and storing the plurality of parameter values measured after the predefined time interval in an additional fingerprint file in the memory, adding a predefined ageing offset to the fingerprint file, where the ageing offset corresponds to a predicted wear of the system during the predefined time interval, thereby obtaining a time modified fingerprint file for the system, and storing the time modified fingerprint file in the memory, comparing the additional fingerprint file with the time modified fingerprint file using a control system, and issuing a message if the additional fingerprint file deviate from the time modified fingerprint file.
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Specification