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US 11,585,307 B2Granted
System and method for controlling vehicle stop-start function based on measured and predicted cranking voltages and adaptive adjustment of circuit resistance
AssigneeFord Global Technologies, LLC
InventorsHanyang B. Chen, Ravi Atluru, Michael J. Irby
Life of this patent
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Abstract
A vehicle determines a first resistance of a starter motor and a starter cable connected thereto based at least in part on the first voltage of a power source. The vehicle determines a predicted minimum battery voltage based at least in part on the first resistance of the starter motor and the starter cable. The vehicle, in response to the predicted minimum battery voltage satisfying a threshold, enables a vehicle stop-start function, and, in response to the predicted minimum battery voltage failing to satisfy the threshold, disables the vehicle stop-start function.
Claims20
A vehicle comprising:
- a load;
- a starter motor;
- a starter cable connected to the starter motor;
- a power source electrically coupled to the starter motor and said load;
- a processor;
- and
- memory storing instructions executable by the processor, the instructions, when executed by the processor, cause the processor to:
- determine that an engine of the vehicle has been turned off;
- determine that a first temperature value measured by a first sensor at a first location in the vehicle is the same as a second temperature value measured by a second sensor in a second location in the vehicle;
- determine, based on the determination that the first temperature value is the same as the second temperature value, that the engine of the vehicle has been turned off for a threshold period of time;
- measure, based on the engine being turned off for the threshold period of time, an ambient air temperature of the vehicle;
- determine a first resistance of the starter motor and the starter cable of the vehicle using the ambient air temperature;
- during an engine crank, determine a first voltage of the power source;
- determine a second resistance of the starter motor and the starter cable based at least in part on the first voltage of the power source;
- determine a predicted minimum battery voltage based at least in part on the second resistance of the starter motor and the starter cable;
- and
- responsive to the predicted minimum battery voltage failing to satisfy a threshold, disable a vehicle stop-start function.
14 more elements
A method comprising:
- determine that an engine of a vehicle has been turned off;
- determine that a first temperature value measured by a first sensor at a first location in the vehicle is the same as a second temperature value measured by a second sensor in a second location in the vehicle;
- determining, based on the determination that the first temperature value is the same as the second temperature value, that the engine of the vehicle has been turned off for a threshold period of time;
- measuring, based on the engine of the vehicle being turned off for the threshold period of time, an ambient air temperature of the vehicle;
- determining a first resistance of a start motor of the vehicle and a starter cable of the vehicle using the ambient air temperature;
- during a vehicle engine crank, determining a first voltage of a power source of the vehicle, wherein the power source is electrically coupled to a starter motor of the vehicle and a load of the vehicle;
- determining the first resistance of the starter motor of the vehicle and the starter cable of the vehicle based at least in part on the first voltage of the power source;
- determining a predicted minimum battery voltage based at least in part on the first resistance of the starter motor and the starter cable;
- and
- responsive to the predicted minimum battery voltage failing to satisfy a threshold, disabling a vehicle stop-start function.
7 more elements
Dependencies are inferred from the claim text.