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. 04, 2019
Filed:
Mar. 27, 2018
Yoshinori Saito, Toyota, JP;
Hiromasa Suzuki, Toyota, JP;
Tatsuya Ohashi, Kakegawa, JP;
Keiichi Narita, Kakegawa, JP;
Ryota Nakashima, Kakegawa, JP;
Mitsuyoshi Okada, Kakegawa, JP;
Ryosuke Takasu, Kakegawa, JP;
Shunsuke Oishi, Kakegawa, JP;
Yoshinori Saito, Toyota, JP;
Hiromasa Suzuki, Toyota, JP;
Tatsuya Ohashi, Kakegawa, JP;
Keiichi Narita, Kakegawa, JP;
Ryota Nakashima, Kakegawa, JP;
Mitsuyoshi Okada, Kakegawa, JP;
Ryosuke Takasu, Kakegawa, JP;
Shunsuke Oishi, Kakegawa, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;
CATALER CORPORATION, Kakegawa, JP;
Abstract
An exhaust gas purification catalyst, excellent in the NOx purification capacity and the HC purification capacity, includes a substrate and a catalyst coating layer formed on the surface of the substrate, wherein the catalyst coating layer comprises the upper and lower layer including a lower layer being closer to the surface of the substrate and an upper layer being relatively remote from the surface of the substrate. The upper layer of the catalyst coating layer includes Rh, Pd, and a carrier. The lower layer of the catalyst coating layer includes at least one noble metal selected from Pd and Pt and a carrier. 65% by mass or more of Pd in the upper layer exists in a layer up to 50% of the upper layer in a thickness direction from the surface of the upper layer being relatively remote from the surface of the substrate. The ratio of Pd to Rh by mass (Pd/Rh) is 0.5 to 7.0 in the upper layer.