System and method for diagnosing a fault in a throttle area correction that compensates for intake airflow restrictions
First Claim
1. A system comprising:
- a desired throttle area module that determines a desired throttle area based on a driver input;
a correction factor module that determines a throttle area correction factor based on a difference between an estimated intake airflow and a measured intake airflow to compensate for a decrease in the measured intake airflow due to a flow restriction;
a throttle control module that determines a desired throttle position based on the desired throttle area and the throttle area correction factor; and
an airflow compensation diagnostic module that diagnoses a fault in an amount of intake airflow compensation based on the throttle area correction factor and the difference between the estimated intake airflow and the measured intake airflow.
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Accused Products
Abstract
A system according to the principles of the present disclosure includes a desired throttle area module, a correction factor module, a throttle control module, and an airflow compensation diagnostic module. The desired throttle area module determines a desired throttle area based on a driver input. The correction factor module determines a throttle area correction factor based on a difference between an estimated intake airflow and a measured intake airflow to compensate for a decrease in the measured intake airflow due to a flow restriction. The throttle control module determines a desired throttle position based on the desired throttle area and the throttle area correction factor. The airflow compensation diagnostic module diagnoses a fault in an amount of intake airflow compensation based on the throttle area correction factor.
19 Citations
20 Claims
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1. A system comprising:
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a desired throttle area module that determines a desired throttle area based on a driver input; a correction factor module that determines a throttle area correction factor based on a difference between an estimated intake airflow and a measured intake airflow to compensate for a decrease in the measured intake airflow due to a flow restriction; a throttle control module that determines a desired throttle position based on the desired throttle area and the throttle area correction factor; and an airflow compensation diagnostic module that diagnoses a fault in an amount of intake airflow compensation based on the throttle area correction factor and the difference between the estimated intake airflow and the measured intake airflow.
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2. A system comprising:
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a desired throttle area module that determines a desired throttle area based on a driver input; a correction factor module that determines a throttle area correction factor based on a difference between an estimated intake airflow and a measured intake airflow to compensate for a decrease in the measured intake airflow due to a flow restriction; a throttle control module that determines a desired throttle position based on the desired throttle area and the throttle area correction factor; an airflow compensation diagnostic module that diagnoses a fault in an amount of intake airflow compensation based on the throttle area correction factor; and a learning residual module that determines a learning residual based on an average of N differences between the estimated intake airflow and the measured intake airflow at N different times, wherein; the correction factor module determines the throttle area correction factor based on the learning residual; and N is an integer greater than one. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10)
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11. A method comprising:
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determining a desired throttle area based on a driver input; determining a throttle area correction factor based on a difference between an estimated intake airflow and a measured intake airflow to compensate for a decrease in the measured intake airflow due to a flow restriction; determining a desired throttle position based on the desired throttle area and the throttle area correction factor; and diagnosing a fault in an amount of intake airflow compensation based on the throttle area correction factor and the difference between the estimated intake airflow and the measured intake airflow.
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12. A method comprising:
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determining a desired throttle area based on a driver input; determining a throttle area correction factor based on a difference between an estimated intake airflow and a measured intake airflow to compensate for a decrease in the measured intake airflow due to a flow restriction; determining a desired throttle position based on the desired throttle area and the throttle area correction factor; diagnosing a fault in an amount of intake airflow compensation based on the throttle area correction factor; determining a learning residual based on an average of N differences between the estimated intake airflow and the measured intake airflow at N different times; and determining the throttle area correction factor based on the learning residual, wherein N is an integer greater than one. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification