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. 30, 2022
Filed:
Jan. 02, 2019
Volvo Truck Corporation, Gothenburg, SE;
Joseph Gruber, Greencastle, PA (US);
Jeffrey Zsoldos, Knoxville, MD (US);
Timothy Jacobson, Fairfield, PA (US);
Michael Pecsko, Hagerstown, MD (US);
Joseph Gruber, Greencastle, PA (US);
Jeffrey Zsoldos, Knoxville, MD (US);
Timothy Jacobson, Fairfield, PA (US);
Michael Pecsko, Hagerstown, MD (US);
VOLVO TRUCK CORPORATION, Gothenburg, SE;
Abstract
In a method for operating a urea dosing system in an exhaust aftertreatment system (EATS) of an engine, an ambient temperature is measured in an environment in which the EATS is disposed, one or more temperatures associated with the EATS to which there is a relationship to a temperature of area in the urea dosing system are monitored. After turning off the engine, whether urea in the urea dosing system is subject to freezing is determined based on the measured ambient temperature and the one or more monitored temperatures. A reversion operation is performed after turning off the engine with a delay until one or more events occur, the one or more events including determining that urea in the urea dosing system is subject to freezing. An engine system is also provided.