Method Of Controlling Fuel Composition Learning
First Claim
1. A method of controlling a fuel composition learning process for a motor vehicle, comprising:
- receiving airflow information associated with an engine of the motor vehicle;
determining a change in the airflow information;
retrieving a threshold range;
comparing the change in airflow information with the threshold range; and
initiating the fuel composition learning process when the change in the airflow information is within the threshold range.
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Abstract
A method of controlling fuel composition learning includes steps of monitoring changes in airflow within an engine to determine steady state conditions. The method further includes steps of initiating a fuel composition learning process during steady state conditions. A current fuel component concentration factor is updated using a temporary fuel component concentration factor. The temporary fuel component concentration factor is calculated as the average of an air/fuel correction factor. Once the current fuel component concentration factor is updated, the temporary fuel component concentration factor is reset. The air/fuel correction factor is reset to reflect any difference that existed between the temporary fuel component concentration factor and the air/fuel correction factor at the update time.
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Citations
20 Claims
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1. A method of controlling a fuel composition learning process for a motor vehicle, comprising:
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receiving airflow information associated with an engine of the motor vehicle; determining a change in the airflow information; retrieving a threshold range; comparing the change in airflow information with the threshold range; and initiating the fuel composition learning process when the change in the airflow information is within the threshold range. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of controlling a fuel composition learning process for a motor vehicle, comprising:
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detecting a change in fuel associated with the motor vehicle; monitoring airflow information associated with an engine of the motor vehicle; determining whether the engine of the motor vehicle is operating in a steady state condition; upon a determination that the engine is operating in the steady state condition, initiating the fuel composition learning process; and upon a determination that the engine is not operating in the steady state condition, continuing to monitor the airflow information associated with the engine of the motor vehicle. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
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15. A method of controlling a fuel composition learning process for a motor vehicle, comprising:
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detecting a change in fuel associated with the motor vehicle; receiving airflow information from an airflow sensor associated with an engine of the motor vehicle; calculating a change in the airflow information; retrieving a predetermined threshold range associated with a steady state condition of the engine of the motor vehicle; comparing the change in the airflow information to the predetermined threshold range, wherein the predetermined threshold range comprises an upper threshold and a lower threshold; determining that the engine is operating in the steady state condition when the change in the airflow information is less than the upper threshold and greater than the lower threshold; and initiating the fuel composition learning process upon determining that the engine is operating in the steady state condition. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification