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:
Sep. 22, 2015
Filed:
Apr. 04, 2014
Caterpillar Inc., Peoria, IL (US);
Bryan Edward Nelson, Chillicothe, IL (US);
Kevin L. Dea, Morton, IL (US);
Brian Cole, Peoria, IL (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
A reductant dosing system for an engine is disclosed. The disclosed reductant dosing system includes a reservoir of reductant fluid that is connected to an inlet of a reductant pump. The pump has an outlet that is fluidly connected to the reservoir, an inlet of a pressure regulator and an inlet of an injector. The pressure regulator includes a reductant pressure control valve that fluidly connects the outlet of the reductant pump to the reservoir when the reductant pressure control valve is in an open position. A compressed gas source is fluidly connected to an air supply control valve that fluidly connects the compressed gas source to the reservoir when the air supply control valve is in an open position. The air supply control valve also has a closed position and is shifted between the open and closed positions by a controller.