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:
Mar. 04, 2014
Filed:
Mar. 14, 2012
Michael Levin, Ann Arbor, MI (US);
Furqan Zafar Shaikh, Troy, MI (US);
Thomas A. Mccarthy, Dearborn, MI (US);
Bret Alan Zimmerman, Grosse Pointe Farms, MI (US);
Michael Levin, Ann Arbor, MI (US);
Furqan Zafar Shaikh, Troy, MI (US);
Thomas A. McCarthy, Dearborn, MI (US);
Bret Alan Zimmerman, Grosse Pointe Farms, MI (US);
Ford Global Technologies, LLC, Dearborn, MI (US);
Abstract
A method for operating a liquid reductant injection system is provided. The method includes storing a reductant mixture of ethanol, water, and urea; drawing the stored mixture into an electrically heated pick-up tube for delivery via a delivery line to the exhaust by operating a pump in a first direction; and, clearing a return line that returns the stored mixture or the delivery line by operating the pump in a second, reverse, direction. In this way, by including ethanol in the reductant solution, a freezing point temperature of the liquid reductant may be reduced.