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:
Jun. 10, 2014
Filed:
May. 07, 2009
Kohei Yoshida, Gotenba, JP;
Takamitsu Asanuma, Mishima, JP;
Masahide Iida, Susono, JP;
Yuichi Sobue, Susono, JP;
Kohei Yoshida, Gotenba, JP;
Takamitsu Asanuma, Mishima, JP;
Masahide Iida, Susono, JP;
Yuichi Sobue, Susono, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, JP;
Abstract
An exhaust purification system of an internal combustion engine includes an NOstorage reduction catalyst device which is arranged in an engine exhaust passage. The NOstorage reduction catalyst device stores SOsimultaneously with NO. When the stored SOamount exceeds a predetermined allowable amount, the SOis made to be released by SOrelease control which raises the temperature of the NOcatalyst device to the SOreleasable temperature, then makes the air-fuel ratio of the exhaust gas which flows into the NOcatalyst device the stoichiometric air-fuel ratio or rich. The NOcatalyst device has a residual SOstorage amount which finally remains even if performing SOrelease control depending on the temperature of the NOcatalyst device when performing SOrelease control. The system uses the residual SOstorage amount of the current SOrelease control as the basis to calculate the SOrelease speed at each timing in the current SOrelease control.