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:
Jan. 29, 2019
Filed:
Jun. 15, 2015
Deere & Company, Moline, IL (US);
Taner Tuken, Cedar Falls, IA (US);
DEERE & COMPANY, Moline, IL (US);
Abstract
An engine includes an exhaust gas system which flows exhaust gasses through an aftertreatment device. A method is provided for detecting the aftertreatment device during a transient operating condition. The method includes sensing temperature of the exhaust gas at an inlet and at an outlet of exhaust aftertreatment system. The inlet temperature is filtered and an inlet temperature difference between the filtered and unfiltered inlet temperatures is calculated. If the absolute value of the inlet temperature difference is greater than the predetermined threshold, then an outlet temperature difference is calculated. If the absolute value of the outlet temperature difference is greater than the second threshold, then a fault signal is generated, indicating that an aftertreatment device is missing. The aftertreatment device includes an SCR catalyst and an ammonia oxidation catalyst.