Method and apparatus to evaluate a starter motor for an internal combustion engine
First Claim
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1. A method for monitoring an electrically-powered starter motor for a starter of an internal combustion engine, comprising:
- determining a starter motor resistance associated with an engine starting event;
determining a back-emf for the starter motor based upon the starter motor resistance;
determining a state of health (SOH) of the starter motor corresponding to the back-emf of the starter motor and a measured engine cranking time; and
controlling engine stop/start functionality based upon the SOH of the starter motor.
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Abstract
A method for monitoring the starter motor includes determining starter motor resistance associated with an engine starting event and determining a back-emf for the starter motor based upon the starter motor resistance. A state of health of the starter motor corresponding to the back-emf of the starter motor and engine cranking time is determined. Engine stop/start functionality is controlled based upon the state of health of the starter motor.
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Citations
20 Claims
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1. A method for monitoring an electrically-powered starter motor for a starter of an internal combustion engine, comprising:
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determining a starter motor resistance associated with an engine starting event; determining a back-emf for the starter motor based upon the starter motor resistance; determining a state of health (SOH) of the starter motor corresponding to the back-emf of the starter motor and a measured engine cranking time; and controlling engine stop/start functionality based upon the SOH of the starter motor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for monitoring a starter motor for an internal combustion engine configured to execute stop/start functions associated with autostop and autostart actions, comprising:
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determining starter motor resistance associated with an engine starting event; determining a back-emf for the starter motor based upon the starter motor resistance; determining a state of health (SOH) of the starter motor corresponding to the back-emf of the starter motor, a measured engine cranking time, and starter motor temperature; and disabling the engine stop/start functions for a present vehicle key-on cycle when the SOH of the starter motor is less than a first threshold SOH. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification