The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 11, 2007
Filed:
May. 26, 2006
James F. Sinnamon, Birmingham, MI (US);
James F. Sinnamon, Birmingham, MI (US);
Delphi Technologies, Inc., Troy, MI (US);
Abstract
A method for coordinating engine throttle position with camshaft phaser motion during transient engine operation such that desired internal residual dilution is maintained. A dilution model for residual mass fraction and a table of desired dilution values are embedded in the engine control algorithm. The dilution model is applied to calculate the desired throttle and camshaft phaser positions for the next intake event. In a first method, if the throttle is capable of changing the airflow into the engine cylinders faster than the camshaft phasers can respond, the throttle is modulated to maintain desired dilution levels while the phasers are allowed to move as fast as they can. In a second method, if the phaser response faster than the engine intake port airflow response to a throttle position change, the throttle is allowed to move as fast as it can while phaser motion is modulated to maintain desired dilution levels.