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:
Oct. 23, 2012
Filed:
Jun. 17, 2008
Terrence Francis Alger, Ii, San Antonio, TX (US);
Barrett Wade Mangold, Atascosa, TX (US);
Jess Witman Gingrich, San Antonio, TX (US);
Darius Mehta, San Antonio, TX (US);
Terrence Francis Alger, II, San Antonio, TX (US);
Barrett Wade Mangold, Atascosa, TX (US);
Jess Witman Gingrich, San Antonio, TX (US);
Darius Mehta, San Antonio, TX (US);
Southwest Research Institute, San Antonio, TX (US);
Abstract
Improved exhaust gas recirculation system and methods that use one or more of the engine's cylinders as dedicated EGR cylinders. All of the exhaust from the dedicated EGR cylinders is recirculated back to the engine intake. Thus, the EGR rate is constant, but the EGR mass flow may be controlled by adjusting the air-fuel ratio of the dedicated EGR cylinders or by using various variable valve timing techniques.