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:
Jul. 04, 2017
Filed:
Sep. 02, 2015
Deere & Company, Moline, IL (US);
Taner Tuken, Cedar Falls, IA (US);
Robert J. Iverson, Waterloo, IA (US);
Deere & Company, Moline, IL (US);
Abstract
System and method of treating exhaust gas from an internal combustion engine using selective catalytic reduction (SCR) and adaptive control of diesel exhaust fluid (DEF) injection. Adaptive control of DEF injection includes intentionally underdosing the injected DEF based on an amount of DEF determined by an electronic control unit as an amount needed to reduce nitrogen oxides (NO) to a compliance threshold. Since underdosing prevents ammonia (NH) slip from occurring due to low levels of DEF, a sensor accurately senses NOpresent in the exhaust gas at an output of an SCR chamber. An electronic control unit increases the amount of injected DEF based on the sensor.