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:
Oct. 18, 2011
Filed:
Jun. 18, 2007
Jun Tahara, Toyota, JP;
Fuminori Honjo, Kariya, JP;
Jun Tahara, Toyota, JP;
Fuminori Honjo, Kariya, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
Kabushiki Kaisha Toyota Jidoshokki, Kariya-shi, Aichi-ken, JP;
Abstract
A PM catalyst regeneration control for the purpose of 'soot removal' is performed prior to a sulfur poisoning recovery control. In the PM catalyst regeneration control, PM deposits in a catalyst are burned. A target throttle opening degree for the sulfur poisoning recovery control is preset smaller than a target throttle opening for the PM catalyst regeneration control in order to reduce the intake air volume during deceleration. A catalyst bed temperature is thus prevented from dropping, and therefore maintained at a level appropriate to sulfur poisoning recovery. Controlling the intake air volume during deceleration in such a manner results in more efficient catalyst recovery from sulfur poisoning, so that the fuel economy is maintained during the sulfur poisoning recovery control.