Method for detecting steady-state and transient air flow conditions for cam-phased engines
First Claim
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1. An air flow state determining system that determines a mass air flow into a cylinder of an engine having a cam phaser, comprising:
- a first module that determines whether an air flow state is one of steady-state and transient based on a cam phaser position; and
a second module that determines said mass air flow using one of a mass air flow sensor signal and a speed density relationship based on whether said mass air flow state is one of steady-state and transient.
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Abstract
An air flow state determining system that determines a mass air flow into a cylinder of an engine having a cam phaser includes a first module that determines whether an air flow state is one of steady-state and transient based on a cam phaser position. A second module determines the mass air flow using one of a mass air flow sensor signal and a speed density relationship based on whether the mass air flow state is one of steady-state and transient.
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Citations
16 Claims
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1. An air flow state determining system that determines a mass air flow into a cylinder of an engine having a cam phaser, comprising:
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a first module that determines whether an air flow state is one of steady-state and transient based on a cam phaser position; and a second module that determines said mass air flow using one of a mass air flow sensor signal and a speed density relationship based on whether said mass air flow state is one of steady-state and transient. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of determining a mass air flow into a cylinder of an engine having a cam phaser, comprising:
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monitoring a cam phaser position; determining whether an air flow state is one of steady-state and transient based on a cam phaser position; and determining said mass air flow using one of a mass air flow sensor signal and a speed density relationship based on whether said mass air flow state is one of steady-state and transient. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A method of determining a mass air flow into a cylinder of an engine having a cam phaser, comprising:
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monitoring a cam phaser position; filtering said cam phaser position; processing said cam phaser position using a linear model to determine an updated intermediate variable; determining whether an air flow state is one of steady-state and transient based on said updated intermediate variable and a previous intermediate variable; and determining said mass air flow using one of a mass air flow sensor signal and a speed density relationship based on whether said mass air flow state is one of steady-state and transient. - View Dependent Claims (14, 15, 16)
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Specification