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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.:

US 10337373 B1

PDFFull Text
Date of Patent:
Jul. 02, 2019

Filed:

Jun. 26, 2015

Exhaust purification device

Applicant:

Yanmar Co., Ltd., Osaka-shi, JP;

Inventor:

Yoshinori Fukui, Osaka, JP;

Assignee:

YANMAR CO., LTD., Osaka, JP;

Attorney:

Norton Rose Fulbright US LLP

Primary Examiner:

Patrick D Maines

Int. Cl.
CPC ...
F01N 3/20 (2006.01); F01N 3/08 (2006.01); F02D 41/22 (2006.01); F02D 43/00 (2006.01); F02D 45/00 (2006.01); F01N 3/10 (2006.01); F02D 41/02 (2006.01); B60H 1/12 (2006.01); B60R 13/08 (2006.01); B60R 19/02 (2006.01); F01N 3/30 (2006.01); F01P 5/02 (2006.01); F02B 13/02 (2006.01); F01K 19/08 (2006.01); F01N 3/023 (2006.01); F02M 35/06 (2006.01); F23D 14/52 (2006.01); F23D 14/82 (2006.01); B60R 19/18 (2006.01);
U.S. Cl.
CPC ...
F01N 3/20 (2013.01); B60H 1/12 (2013.01); B60R 13/0884 (2013.01); B60R 19/02 (2013.01); F01K 19/08 (2013.01); F01N 3/0233 (2013.01); F01N 3/08 (2013.01); F01N 3/103 (2013.01); F01N 3/208 (2013.01); F01N 3/2066 (2013.01); F01N 3/2093 (2013.01); F01N 3/30 (2013.01); F01P 5/02 (2013.01); F02B 13/02 (2013.01); F02D 41/027 (2013.01); F02D 41/22 (2013.01); F02D 43/00 (2013.01); F02D 45/00 (2013.01); F02M 35/06 (2013.01); F23D 14/52 (2013.01); F23D 14/82 (2013.01); B01D 2239/0622 (2013.01); B60R 2019/184 (2013.01); B60R 2019/188 (2013.01); F01N 2550/02 (2013.01); F01N 2560/026 (2013.01); F01N 2560/08 (2013.01); F01N 2610/02 (2013.01); F02B 2720/257 (2013.01); F02D 2250/08 (2013.01); Y02A 50/2325 (2018.01); Y02T 10/24 (2013.01);
Abstract

The invention provides an exhaust purification device capable of suppressing the temporal decrease in NOx catalyst removal efficiency due to soot accumulation. The invention provides an exhaust purification device using an air injection nozzle to inject pressurized air into a casing of a catalyst reactor containing an NOx catalyst as a catalyst and removing soot adhering to the NOx catalyst, wherein it is determined and externally notified that there is abnormal deterioration in the NOx catalyst when the pressure difference ΔP in exhaust between the upstream and downstream sides of the NOx catalyst has increased by at least a first reference pressure difference increase ΔPt, which is the allowable amount of pressure difference increase, above the pressure difference ΔPi in exhaust between the upstream and downstream sides of the catalyst in the initial state at the same exhaust flow rate Ve.

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