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:
Jan. 04, 2005
Filed:
Jan. 31, 2001
Salim A. Jaliwala, Columbus, IN (US);
Paul R. Miller, Columbus, IN (US);
Larry J. Brackney, Columbus, IN (US);
Thomas A. Dollmeyer, Columbus, IN (US);
Chuan He, Columbus, IN (US);
George Brunemann, Cincinnati, OH (US);
John F. Wright, Columbus, IN (US);
Stephen J. Charlton, Columbus, IN (US);
Salim A. Jaliwala, Columbus, IN (US);
Paul R. Miller, Columbus, IN (US);
Larry J. Brackney, Columbus, IN (US);
Thomas A. Dollmeyer, Columbus, IN (US);
Chuan He, Columbus, IN (US);
George Brunemann, Cincinnati, OH (US);
John F. Wright, Columbus, IN (US);
Stephen J. Charlton, Columbus, IN (US);
Cummins, Inc., Columbus, IN (US);
Abstract
A system is disclosed for estimating the mass flow of recirculated exhaust gas (EGR) from an exhaust manifold to an intake manifold of an internal combustion engine via an EGR conduit disposed therebetween and a fraction of EGR attributable to a mass of charge flow entering the intake manifold. An engine controller is responsive to current values of various combinations of the engine exhaust temperature (ETE), intake manifold pressure (IMP), differential pressure (ΔP) across an EGR valve, and EGR valve position (EGRP) to determine an estimate of EGR mass flow. The controller is further operable to estimate EGR fraction as a function of the estimated EGR mass flow value, mass flow of charge entering the intake manifold, and engine speed.