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:
Jun. 02, 2020
Filed:
Jul. 02, 2018
Watlow Electric Manufacturing Company, St. Louis, MO (US);
Wenzhong Zhang, Savage, MN (US);
Mike Bange, Elsberry, MO (US);
Scott Boehmer, Hannibal, MO (US);
Magdi Khair, San Antonio, TX (US);
Julian Tan, Vernon Hills, IL (US);
WATLOW ELECTRIC MANUFACTURING COMPANY, St. Louis, MO (US);
Abstract
A heater control module of the present disclosure controls exhaust temperature in an exhaust after treatment system. The heater control module includes a heating mode determination module and a heater operating module. The heating mode determination module is configured to select a desired heating mode from a plurality of heating modes based on an engine load and a status of a component of the exhaust aftertreatment system. The heater operating module is configured to operate an electric heater based on the desired heating mode. The plurality of modes includes at least a passive regeneration heating mode and an active regeneration heating mode. The electric heater is operated in the passive regeneration heating mode to heat an exhaust gas to a predetermined temperature to increase NOgeneration when an engine load is less than or equal to approximately 25%.