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. 21, 2020
Filed:
Mar. 24, 2016
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
Cataler Corporation, Kakegawa-shi, Shizuoka-ken, JP;
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;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Tokoya-shi, Aichi, JP;
CATALER CORPORATION, Kakegawa-shi, Shizuoka, JP;
Abstract
An object of the present invention is to provide an exhaust gas purification catalyst which can exhibit high durability and warm-up performance. 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 upstream 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.