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. 21, 2011
Filed:
Jun. 26, 2008
Freeman Carter Gates, Bloomfield Hills, MI (US);
Gitanjli Mcroy, Ann Arbor, MI (US);
Sassan Farahmand, Canton, MI (US);
Joseph Michael Grandas, Dearborn, MI (US);
Freeman Carter Gates, Bloomfield Hills, MI (US);
Gitanjli McRoy, Ann Arbor, MI (US);
Sassan Farahmand, Canton, MI (US);
Joseph Michael Grandas, Dearborn, MI (US);
Ford Global Technologies, LLC, Dearborn, MI (US);
Abstract
An exhaust gas recirculation system has an EGR valve disposed in an EGR duct connecting an engine intake and exhaust. A diaphragm of said EGR valve is actuated via vacuum from the engine intake, the application of the vacuum is controlled via an electronic valve regulator (EVR). The EVR is provided a fixed signal to cause it to be fully open when it is determined that the engine is about to encounter a condition in which there is insufficient vacuum to open the EGR valve. The EVR is provided a variable signal during other operating conditions in which there is sufficient vacuum to open the EGR valve.