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:
Sep. 12, 2000
Filed:
Jan. 15, 1999
Michael John Cullen, Northville, MI (US);
Robert Roy Jentz, Westland, MI (US);
James Matthew Kindree, Livonia, MI (US);
David Robert Nader, Farmington Hills, MI (US);
Ford Global Technologies, Inc., Dearborn, MI (US);
Abstract
EGR system for an internal combustion engine (105) comprises an EGR valve (150) disposed in an EGR recirculation conduit (125) involves estimating exhaust gas temperature at an engine exhaust manifold. An exhaust gas temperature drop between the exhaust manifold and the EGR valve is estimated and a time constant is determined that models the exhaust gas temperature as a function of EGR mass flow rate so that exhaust gas temperature at the EGR valve can be estimated by adjusting the estimated exhaust gas temperature at the exhaust manifold by the exhaust gas temperature drop and the time constant.