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:
Dec. 08, 2015
Filed:
Aug. 22, 2011
Laura M. Ricart-ugaz, Chicago, IL (US);
Qianfan Xin, Lake Zurich, IL (US);
Daniel Cornelius, Chicago, IL (US);
Luis Carlos Cattani, Aurora, IL (US);
Laura M. Ricart-Ugaz, Chicago, IL (US);
Qianfan Xin, Lake Zurich, IL (US);
Daniel Cornelius, Chicago, IL (US);
Luis Carlos Cattani, Aurora, IL (US);
International Engine Intellectual Property Company, LLC, Lisle, IL (US);
Abstract
When the difference by which pressure in an engine exhaust manifold exceeds pressure in an engine intake manifold becomes less than a selected difference while an intake valve operating mechanism is closing cylinder intake valves at a selected time in the engine cycle, while an EGR system is conveying the engine exhaust component of an air/exhaust mixture from an exhaust system to an intake system, and a certain quantity of NOx is present in engine exhaust entering the exhaust manifold, the quantity of NOx present in engine exhaust entering the exhaust manifold is reduced below that certain quantity by causing the intake valve operating mechanism to close the cylinder intake valves earlier in the engine cycle than the selected time.