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. 18, 2011
Filed:
Oct. 01, 2008
Hiroshi Yamada, Hiroshima, JP;
Kenji Suzuki, Hiroshima, JP;
Koichiro Harada, Hiroshima, JP;
Kenji Okamoto, Hiroshima, JP;
Akihide Takami, Hiroshima, JP;
Susumu Mineoi, Hiroshima, JP;
Hirosuke Sumida, Hiroshima, JP;
Hiroshi Yamada, Hiroshima, JP;
Kenji Suzuki, Hiroshima, JP;
Koichiro Harada, Hiroshima, JP;
Kenji Okamoto, Hiroshima, JP;
Akihide Takami, Hiroshima, JP;
Susumu Mineoi, Hiroshima, JP;
Hirosuke Sumida, Hiroshima, JP;
Mazda Motor Corporation, , JP;
Abstract
Disclosed is a particulate filter, which is adapted to be disposed in an exhaust passage of an engine to trap particulate matter contained in exhaust gas discharged from the engine. The particulate filter comprises a filter body having a porous partition wall which defines a plurality of exhaust gas channels allowing the exhaust gas to pass therethrough, and a catalyst layer formed on a surface of the porous partition wall. The catalyst layer includes a Zr-based composite oxide which contains zirconium (Zr), and a rare-earth metal except cerium, wherein a content ratio of an oxide of the non-cerium rare-earth metal to a total amount of ZrOand the oxide of the non-cerium rare-earth metal in the Zr-based composite oxide is set in the range of greater than 33 mol % to less than 40 mol %. The particulate filter of the present invention can achieve a higher PM burning rate to burn PM within a shorter period of time. In addition, the higher PM burning rate makes it possible to provide enhanced fuel economy performance in an engine designed to perform a post-injection control.