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. 20, 2015
Filed:
May. 25, 2012
Giovanni Cavataio, Dearborn, MI (US);
Rachel Alison Snow, Belleville, MI (US);
Jacqueline A. Lymburner, Carleton, MI (US);
Joseph Robert Theis, Rockwood, MI (US);
Giovanni Cavataio, Dearborn, MI (US);
Rachel Alison Snow, Belleville, MI (US);
Jacqueline A. Lymburner, Carleton, MI (US);
Joseph Robert Theis, Rockwood, MI (US);
Ford Global Technologies, LLC, Dearborn, MI (US);
Abstract
Embodiments for controlling exhaust oxygen concentration are provided. In one example, an engine method comprises operating the engine with lean combustion, and when exhaust oxygen concentration is below a threshold, injecting air into an exhaust passage between a first emission control device and an SCR device. In this way, excess emissions may be converted while operating with lean combustion.