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:
Jul. 02, 2019
Filed:
Jun. 21, 2018
Cataler Corporation, Kakegawa-shi, Shizuoka, JP;
CATALER CORPORATION, Kakegawa, JP;
Abstract
An exhaust gas purification material according to the present invention is provided with a particulate filterthat traps particulate matter in exhaust gas and contains an SCR catalyst for adsorbing ammonia and reducing NOx in the exhaust gas. A maximum allowable adsorption amount of ammonia adsorbable by the filterdiffers between an upstream portionof the filterincluding an exhaust gas inlet-side end, and a downstream portionof the filterincluding an exhaust gas outlet-side end. The SCR catalyst contained in the upstream portionand the SCR catalyst contained in the downstream portionare qualitatively different. A ratio (B/A) of a maximum allowable adsorption amount of ammonia A in the upstream portionand a maximum allowable adsorption amount of ammonia B in the downstream portionsatisfies the relationship 1.1≤(B/A)≤2.