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:
Jun. 30, 2015
Filed:
Sep. 13, 2011
Gurpreet Gambhir, Peoria, IL (US);
Rammohan Sankar, Dunlap, IL (US);
Travis Barnes, Metamora, IL (US);
Zenebe Gete, Peoria, IL (US);
Gurpreet Gambhir, Peoria, IL (US);
Rammohan Sankar, Dunlap, IL (US);
Travis Barnes, Metamora, IL (US);
Zenebe Gete, Peoria, IL (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
A system and method for measuring an EGR flow rate for an engine having an EGR valve with a selectable EGR valve position and a venturi sensor situated to take a differential pressure measurement relative to recirculated exhaust gas includes determining an EGR valve effective area based on the EGR valve position, determining a weighting factor based on the effective area, calculating a first EGR flow estimate based on the effective area, and calculating a second EGR flow estimate based on the differential pressure measurement of the venturi sensor. A final EGR flow rate is determined based on the weighting factor, the first EGR flow estimate, and the second EGR flow estimate.