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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 11224840 B1

PDFFull Text
Date of Patent:
Jan. 18, 2022

Filed:

Mar. 24, 2016

Exhaust gas purification catalyst

Applicants:

Toyota Jidosha Kabushiki Kaisha, Toyota, JP;

Cataler Corporation, Kakegawa, JP;

Inventors:

Hiromasa Suzuki, Toyota, JP;

Masahide Miura, Toyota, JP;

Yoshinori Saito, Kakegawa, JP;

Satoru Katoh, Nagakute, JP;

Toshitaka Tanabe, Nagakute, JP;

Tetsuhiro Hirao, Toyota, JP;

Tatsuya Ohashi, Kakegawa, JP;

Hiroaki Naito, Kikugawa, JP;

Hirotaka Ori, Kakegawa, JP;

Michihiko Takeuchi, Kakegawa, JP;

Keiichi Narita, Kakegawa, JP;

Assignees:

TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;

CATAIER CORPORATION, Kakegawa, JP;

Attorney:

Sughrue Mion, PLLC

Primary Examiner:

Haytham Soliman

Int. Cl.
CPC ...
B01J 23/10 (2006.01); B01D 53/94 (2006.01); B01J 37/08 (2006.01); B01J 35/10 (2006.01); B01J 37/02 (2006.01); B01J 35/02 (2006.01); B01J 35/00 (2006.01); B01J 23/63 (2006.01); B01J 37/00 (2006.01); B01J 23/56 (2006.01); B01J 35/04 (2006.01); F01N 3/10 (2006.01); F01N 3/28 (2006.01);
U.S. Cl.
CPC ...
B01D 53/945 (2013.01); B01D 53/94 (2013.01); B01D 53/9468 (2013.01); B01D 53/9472 (2013.01); B01J 23/56 (2013.01); B01J 23/63 (2013.01); B01J 35/0006 (2013.01); B01J 35/023 (2013.01); B01J 35/026 (2013.01); B01J 35/04 (2013.01); B01J 35/10 (2013.01); B01J 35/108 (2013.01); B01J 35/1076 (2013.01); B01J 37/0018 (2013.01); B01J 37/0219 (2013.01); B01J 37/0244 (2013.01); B01J 37/08 (2013.01); F01N 3/101 (2013.01); F01N 3/28 (2013.01); B01D 2255/10 (2013.01); B01D 2255/1021 (2013.01); B01D 2255/1023 (2013.01); B01D 2255/1025 (2013.01); B01D 2255/2063 (2013.01); B01D 2255/407 (2013.01); B01D 2255/9022 (2013.01); B01D 2255/9032 (2013.01); B01D 2255/9202 (2013.01); B01D 2255/9205 (2013.01); B01J 37/0036 (2013.01); B01J 37/0234 (2013.01); F01N 2510/0682 (2013.01); Y02T 10/12 (2013.01);
Abstract

An object of the present invention is to provide an exhaust gas purification catalyst which can exhibit sufficient purification performance even under a high Ga condition. The present invention relates to an exhaust gas purification catalyst comprising a substrate and a catalyst coating layer formed on the substrate, wherein the catalyst coating layer comprises catalyst particles, the catalyst coating layer having an upstream region extending by 40 to 60% of the entire length of the substrate from an upstream end of the catalyst in the direction of an exhaust gas flow and a downstream region corresponding to the remainder portion of the catalyst coating layer, the composition of the catalyst particle of the upstream region being different from that of the downstream region. The downstream region in the direction of an exhaust gas flow has a structure where a void is included in a large number, and furthermore high-aspect-ratio pores having an aspect ratio of 5 or more account for a certain percentage or more of the whole volume of voids. Thus, the exhaust gas purification catalyst exhibits enhanced purification performance.

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