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. 23, 2015
Filed:
May. 14, 2012
Chad P. Koci, Chillicothe, IL (US);
Vlad L. C. Ulmet, San Antonio, TX (US);
Stefan Simescu, Boerne, TX (US);
Magdi K. Khair, San Antonio, TX (US);
Gary D. Neely, Boerne, TX (US);
Chad P. Koci, Chillicothe, IL (US);
Vlad L. C. Ulmet, San Antonio, TX (US);
Stefan Simescu, Boerne, TX (US);
Magdi K. Khair, San Antonio, TX (US);
Gary D. Neely, Boerne, TX (US);
SOUTHWEST RESEARCH INSTITUTE, San Antonio, TX (US);
Abstract
A method for controlling emissions in the exhaust gas of a diesel engine, the engine having an exhaust gas recirculation (EGR) system. The engine's exhaust aftertreatment system need have only an oxidation catalyst and a particulate filter (with no NOx reduction or adsorption device). In 'normal' engine conditions, the engine is operated with a lean air-fuel ratio, with 'normal' engine conditions being engine conditions other than transient load increase engine conditions. Also, during normal engine conditions, the EGR system is used to reduce engine-out NOx. During transient load increase engine conditions, the engine is operated stoichiometrically or near stoichiometrically and the use of EGR is interrupted.