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:
Dec. 29, 2015
Filed:
Jul. 04, 2011
Takanori Nakano, Okazaki, JP;
Haruyuki Katayama, Susono, JP;
Shinya Hirota, Susono, JP;
Shunsuke Toshioka, Susono, JP;
Koichiro Fukuda, Numazu, JP;
Takanori Nakano, Okazaki, JP;
Haruyuki Katayama, Susono, JP;
Shinya Hirota, Susono, JP;
Shunsuke Toshioka, Susono, JP;
Koichiro Fukuda, Numazu, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
Abstract
The purpose of the present invention is to suppress degradation of a PM sensor and a decrease in detection accuracy of the amount of PM in a configuration in which a urea addition unit and a selective reduction-type NOx catalyst (NOx catalyst) are provided downstream of a particulate filter (filter) in an internal combustion engine exhaust passage, the PM sensor being disposed downstream of the filter. According to the present invention, in an exhaust passage () of an internal combustion engine (), a first NOx catalyst () and a second NOx catalyst () are disposed downstream of a filter () successively from the upstream side along the flow of exhaust. A urea addition unit () is disposed between the filter () and the first NOx catalyst (). A PM sensor () is disposed between the first NOx catalyst () and the second NOx catalyst ().