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 airflow from the received airflow information, wherein the change in airflow is determined for a predetermined time period;
retrieving a threshold range, wherein the threshold range includes an upper threshold for the change in airflow over the predetermined time period and wherein the threshold range includes a lower threshold for the change in airflow over the predetermined time period;
comparing the change in airflow with the threshold range; and
initiating the fuel composition learning process when the change in airflow is within the threshold range.
0 Assignments
0 Petitions
Accused Products
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.
-
Citations
20 Claims
-
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 airflow from the received airflow information, wherein the change in airflow is determined for a predetermined time period; retrieving a threshold range, wherein the threshold range includes an upper threshold for the change in airflow over the predetermined time period and wherein the threshold range includes a lower threshold for the change in airflow over the predetermined time period; comparing the change in airflow with the threshold range; and initiating the fuel composition learning process when the change in airflow is within the threshold range. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A method of controlling a fuel composition learning process for a motor vehicle, comprising:
-
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 based on the monitored airflow information; 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)
-
-
15. A method of controlling a fuel composition learning process for a motor vehicle, comprising:
-
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 airflow from the airflow information, wherein the change in airflow is a value characterizing how the airflow in the engine of the motor vehicle changes in time; retrieving a predetermined threshold range associated with a steady state condition of the engine of the motor vehicle; comparing the change in airflow to the predetermined threshold range, wherein the predetermined threshold range comprises an upper threshold for the change in airflow over the predetermined time period and wherein the predetermined threshold range includes a lower threshold for the change in airflow over the predetermined time period; determining that the engine is operating in the steady state condition when the change in airflow 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)
-
Specification