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. 15, 2021
Filed:
Feb. 27, 2020
Applicant:
Ngk Insulators, Ltd., Nagoya, JP;
Inventors:
Assignee:
NGK Insulators, Ltd., Nagoya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01N 3/02 (2006.01); F01N 3/20 (2006.01); B01D 46/00 (2006.01); B01D 46/44 (2006.01); B01D 46/46 (2006.01); F01N 3/029 (2006.01); F01N 3/022 (2006.01);
U.S. Cl.
CPC ...
F01N 3/0293 (2013.01); B01D 46/0063 (2013.01); B01D 46/448 (2013.01); B01D 46/46 (2013.01); F01N 3/022 (2013.01); F01N 3/208 (2013.01); F01N 3/2073 (2013.01); B01D 2279/30 (2013.01); F01N 2610/02 (2013.01); F01N 2610/1406 (2013.01); F01N 2610/1453 (2013.01); F01N 2900/1602 (2013.01); F01N 2900/1811 (2013.01);
Abstract
A method for regenerating an exhaust gas filter on which soot is deposited, including sequentially conducting: a step 1 of impregnating the filter with a liquid having 50% by mass or more of a component having a boiling point of 550° C. or less when an ambient temperature in the filter is at least 40° C. lower than the boiling point; a step 2 of raising the ambient temperature in the filter after the impregnation to a temperature equal to or higher than the boiling point of the component; and a step 3 of supplying an oxygen-containing gas at a temperature exceeding 550° C. to the filter to burn the soot.