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. 24, 2017
Filed:
Sep. 18, 2014
Caterpillar Inc., Peoria, IL (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
An exhaust gas recirculation (EGR) system includes an EGR duct configured to effect fluid communication between an exhaust duct and an intake duct of an internal combustion engine; a heat exchanger having a first flow passage and a second flow passage, the first flow passage being in fluid communication with the EGR duct, the second flow passage being configured to receive a heat transfer medium from a heat transfer medium source; an upstream purge valve in fluid communication with the second flow passage of the heat exchanger, and configured to effect selective fluid communication between a purge fluid source and the second flow passage of the heat exchanger; and a controller operatively coupled to the upstream purge valve. The controller is configured to purge the second flow passage of the heat exchanger by opening the upstream purge valve.