Air dynamic steady state and transient detection method for cam phaser movement
First Claim
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1. An air dynamic steady state detection system for movement of a cam phaser of an internal combustion engine, comprising:
- a cam position sensing device that generates a position signal based on a position of said cam phaser of said engine; and
a control module that receives said position signal and that applies first and second filters to said position signal to select one of a transient condition and a steady state condition, and wherein said control module calculates an estimated air value based on said selection of said transient condition and said steady state condition.
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Abstract
An air dynamic steady state detection system for movement of a cam phaser of an internal combustion engine includes a cam position sensing device and a control module. The cam position sensing device generates a position signal based on a position of the cam phaser of the engine. The control module receives the position signal and applies first and second filters to the position signal to select either a transient or steady state condition. The control module also calculates an estimated air value based on the selection of the transient or steady state condition.
32 Citations
19 Claims
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1. An air dynamic steady state detection system for movement of a cam phaser of an internal combustion engine, comprising:
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a cam position sensing device that generates a position signal based on a position of said cam phaser of said engine; and a control module that receives said position signal and that applies first and second filters to said position signal to select one of a transient condition and a steady state condition, and wherein said control module calculates an estimated air value based on said selection of said transient condition and said steady state condition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An air dynamic steady state detection method for cam phaser movement, comprising:
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receiving a cam phaser position signal; applying a first filter to said cam phaser position signal; applying a second filter to said cam phaser position signal; calculating a difference between an output of said first filter and an output of said second filter; selecting a steady state condition when an absolute value of said difference is less than a predetermined value; selecting a transient condition when said absolute value of said difference is greater than or equal to said predetermined value; and selecting a method for calculating an estimated air value based on said steady state condition and said transient condition. - View Dependent Claims (10, 11, 12, 13)
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14. An air dynamic steady state detection system, comprising:
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a first cam position sensing device that generates an intake position signal based on a position of a first cam phaser associated with an intake camshaft; a second cam position sensing device that generates an exhaust position signal based on a position of a second cam phaser associated with an exhaust camshaft; a state determination module that selects one of a transient condition and a steady state condition of said intake camshaft and said exhaust camshaft; and an air estimation module that calculates an estimated air value based on said transient condition and said steady state condition of said intake camshaft and said exhaust camshaft. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification