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:
Apr. 21, 2015
Filed:
Mar. 17, 2011
Mikio Inoue, Susono, JP;
Kohei Yoshida, Gotenba, JP;
Yuki Bisaiji, Mishima, JP;
Kazuhiro Umemoto, Susono, JP;
Masahide Iida, Fuji, JP;
Mikio Inoue, Susono, JP;
Kohei Yoshida, Gotenba, JP;
Yuki Bisaiji, Mishima, JP;
Kazuhiro Umemoto, Susono, JP;
Masahide Iida, Fuji, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
In an internal combustion engine, inside of an engine exhaust passage, a hydrocarbon feed valve (), an exhaust purification catalyst (), a particulate filter (), and an NOreduction catalyst () are arranged. At the time of engine operation, the amplitude of change of the concentration of hydrocarbons which flow into the exhaust purification catalyst () is made to become within a predetermined range of amplitude by control of the injection amount of hydrocarbons from the hydrocarbon feed valve (). When the NOwhich is produced at the particulate filter () should be reduced to NO, the injection amount of hydrocarbons is increased whereby the pass through amount of hydrocarbons which pass straight through the exhaust purification catalyst () is increased.