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. 14, 2015
Filed:
Jun. 29, 2012
Hiroshi Otsuki, Susono, JP;
Shigeki Nakayama, Gotenba, JP;
Hiromasa Nishioka, Susono, JP;
Katsuhiko Oshikawa, Tokyo, JP;
Yoshihisa Tsukamoto, Susono, JP;
Junichi Matsuo, Susono, JP;
Yuichi Sobue, Susono, JP;
Daichi Imai, Susono, JP;
Kou Sugawara, Kakegawa, JP;
Hiroshi Otsuki, Susono, JP;
Shigeki Nakayama, Gotenba, JP;
Hiromasa Nishioka, Susono, JP;
Katsuhiko Oshikawa, Tokyo, JP;
Yoshihisa Tsukamoto, Susono, JP;
Junichi Matsuo, Susono, JP;
Yuichi Sobue, Susono, JP;
Daichi Imai, Susono, JP;
Kou Sugawara, Kakegawa, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;
Abstract
A wall flow type particulate filter is arranged inside the exhaust passage of an internal combustion engine where combustion is performed under an excess of oxygen. The particulate filter carries a solid acid. The solid acid has an acid strength which is higher than the acid strength of sulfurous acid and lower than the acid strength of sulfuric acid. To remove the ash from the particulate filter, ash atomization processing for rendering the state of the particulate filter a state where the exhaust gas which flows into the particulate filter is lowered in concentration of oxygen and the particulate filter is raised in temperature is temporarily performed.