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:
May. 21, 2013
Filed:
May. 18, 2009
Takamitsu Asanuma, Mishima, JP;
Hiromasa Nishioka, Susono, JP;
Daichi Imai, Susono, JP;
Yuka Nakata, Susono, JP;
Kazuhiro Umemoto, Susono, JP;
Takamitsu Asanuma, Mishima, JP;
Hiromasa Nishioka, Susono, JP;
Daichi Imai, Susono, JP;
Yuka Nakata, Susono, JP;
Kazuhiro Umemoto, Susono, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
An exhaust purification system is provided with an NOstorage reduction catalyst arranged in an exhaust passage and an SOtrap material arranged upstream of the NOstorage reduction catalyst and removes SOcontained in exhaust gas. A main flow path has a secondary flow path connected to it. In the secondary flow path, a removal device is arranged for removing the sulfur constituent contained in fuel. The secondary flow path includes an opening and closing device. When the SOremoval rate of the SOtrap material becomes a predetermined removal rate judgment value or less or the concentration of the SOwhich flows into the SOtrap material becomes a predetermined concentration judgment value or more, at least part of the fuel flowing through a main flow path is made to flow into the secondary flow path and run through the removal device.