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:
Aug. 13, 2019
Filed:
Aug. 30, 2017
Caterpillar Inc., Peoria, IL (US);
Brian Cole, Chisago City, MN (US);
Sanket Yeole, Peoria, IL (US);
Darin McCoy, East Peoria, IL (US);
Johnathan Trundt, Peoria, IL (US);
Wayne Davey, Spalding, GB;
Caterpillar Inc., Deerfield, IL (US);
Abstract
A reductant delivery system includes an electronic control unit coupled with each of an electronically controlled reductant injector and an electronically controlled pump, and structured to mitigate obstruction of a reductant injector in an exhaust system of an engine. The electronic control unit is further structured to receive data indicative of a pump duty cycle, and calculate a diagnostic value based on pump duty cycle associated with injection of different amounts of reductant, compare the diagnostic value with a threshold value, and output an error signal to trigger an obstructed-injector mitigation action.