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:
Aug. 18, 2015
Filed:
Jul. 28, 2010
Hiromasa Nishioka, Susono, JP;
Kohei Yoshida, Gotenba, JP;
Yoshihisa Tsukamoto, Susono, JP;
Yuki Bisaiji, Mishima, JP;
Junichi Matsuo, Susono, JP;
Takamitsu Asanuma, Mishima, JP;
Hiromasa Nishioka, Susono, JP;
Kohei Yoshida, Gotenba, JP;
Yoshihisa Tsukamoto, Susono, JP;
Yuki Bisaiji, Mishima, JP;
Junichi Matsuo, Susono, JP;
Takamitsu Asanuma, Mishima, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
In an internal combustion engine, inside of an engine exhaust passage, a hydrocarbon feed valve () and an exhaust treatment catalyst () are arranged. On a substrate () of the exhaust treatment catalyst (), a coat layer comprised of at least two layers of a top coat layer () and a bottom coat layer () is formed. The top coat layer () is comprised of an exhaust purification catalyst for reacting NOcontained in exhaust gas and reformed hydrocarbons, while the bottom coat layer () is comprised of an NOabsorption catalyst. The concentration of hydrocarbons which flows into the exhaust treatment catalyst () is made to vibrate within a predetermined range of amplitude and within a predetermined range of period. Due to this, NOcontained in exhaust gas and NOdesorbed from the NOabsorption catalyst () are reduced in the exhaust purification catalyst ().