Method and system for determining the operational state of a vehicle starter motor
First Claim
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1. A method for determining an operational state of a vehicle starter motor coupled to vehicle battery, comprising:
- detecting a vehicle battery voltage;
deriving an average vehicle battery voltage;
inferring the operational state of the starter motor based at least in part on a difference between the detected vehicle battery voltage and the average vehicle battery voltage.
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Abstract
A method for determining an operational state of a vehicle starter motor coupled to vehicle battery includes the steps of detecting a vehicle battery voltage, deriving an average vehicle battery voltage, and inferring the operational state of the starter motor based at least in part on a difference between the detected vehicle battery voltage and the average vehicle battery voltage.
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Citations
13 Claims
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1. A method for determining an operational state of a vehicle starter motor coupled to vehicle battery, comprising:
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detecting a vehicle battery voltage;
deriving an average vehicle battery voltage;
inferring the operational state of the starter motor based at least in part on a difference between the detected vehicle battery voltage and the average vehicle battery voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for determining an operational state of a vehicle starter motor coupled to a vehicle battery, comprising:
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measuring a vehicle battery voltage;
deriving a filtered vehicle battery voltage based at least in part on the measured vehicle battery voltage;
deriving a difference between the measured vehicle battery voltage and the filtered vehicle battery voltage;
comparing the computed difference between the measured and filtered vehicle battery voltages to a threshold value; and
inferring the operational state of the starter motor based on said comparison step. - View Dependent Claims (9, 10, 11)
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12. A system for determining an operational state of a vehicle starter motor, comprising:
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a sensor for measuring a battery voltage; and
a controller coupled to said sensor for deriving an average battery voltage based on the measured battery voltage and for inferring the operational state of the starter motor based at least in part on a difference between the sensed battery voltage and the average battery voltage.
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13. An article of manufacture for determining an operational state of a vehicle starter motor, comprising:
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a computer usable medium; and
a computer readable program code embodied in the computer usable medium for directing a computer to control the steps of deriving an average battery voltage based on the measured battery voltage and for inferring the operational state of the starter motor based at least in part on a difference between the sensed battery voltage and the average battery voltage.
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Specification