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. 06, 2005
Filed:
Mar. 25, 2004
Rogelio Rodriguez, Plainfield, IL (US);
Adam C. Lack, Willow Springs, IL (US);
Rogelio Rodriguez, Plainfield, IL (US);
Adam C. Lack, Willow Springs, IL (US);
International Engine Intellectual Property Company, LLC, Warrenville, IL (US);
Abstract
Desired engine fueling data FQLMFDTQL is processed by a derivative variable time function () embodied in an algorithm to develop a data value EGRMFDDER representing the time derivative of desired fueling. The algorithm comprises certain selectable parameters (EGRDTS, EGRMFDKF, EGRMFDKD). An iteration of the algorithm includes processing FQLMFDTQL according to a first function (A) to yield a first data value and according to a second function (B) to yield a second data value. A third function (C) subtracts the second data value from the first to yield a data value for the time derivative that forms one input to a map (). A second input to the map is a data value for mass airflow (MAFGMS). The map provides data for calculating the set point of an EGR valve (). The invention provides improved control of EGR during fueling transients.