System and method for engine idle stop control with starter motor protection
First Claim
1. A hybrid vehicle, comprising:
- an engine;
a starter motor configured to start the engine; and
a controller configured to inhibit engine stop during a vehicle stop event in response to a starter motor heat associated with restarting the engine during vehicle stop events exceeding a corresponding heat threshold within a time window, and a predicted vehicle stop duration of the vehicle stop event being less than other vehicle stop events within the time window.
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Accused Products
Abstract
A system and method for controlling engine idle stop in a hybrid vehicle that uses predictive information to schedule engine stops with relatively longer stop duration time to gain more fuel savings and extend life of starter motor. More specifically, predictive information may be used to determine potential vehicle stop events, along with corresponding stop duration times, within a time window. An engine stop scheduler and/or controller may be configured to schedule stops of longer duration for optimal total engine stop time. Similarly, taking into account constraints imposed by the thermal limits of the motor, engine stop may be inhibited for predicted short events to allow engine stop at later longer stop events.
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Citations
15 Claims
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1. A hybrid vehicle, comprising:
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an engine; a starter motor configured to start the engine; and a controller configured to inhibit engine stop during a vehicle stop event in response to a starter motor heat associated with restarting the engine during vehicle stop events exceeding a corresponding heat threshold within a time window, and a predicted vehicle stop duration of the vehicle stop event being less than other vehicle stop events within the time window. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for controlling a hybrid vehicle having a starter motor and an engine, comprising:
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controlling, using a controller, engine stop during a vehicle stop event based on a predicted vehicle stop duration relative to other vehicle stop events within a time window when a predicted starter motor heat within the time window exceeds a starter motor heat threshold; and inhibiting engine stop during the vehicle stop event in response to the predicted starter motor heat exceeding the starter motor heat threshold, and the predicted vehicle stop duration being less than other vehicle stop events within the time window. - View Dependent Claims (12, 13, 14, 15)
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Specification