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:
Jan. 16, 2001
Filed:
Nov. 09, 1998
Katsunori Kaneko, Tokyo, JP;
Kazuo Koga, Tokyo, JP;
Hiromitsu Ando, Tokyo, JP;
Taizo Kitada, Tokyo, JP;
Mitsubishi Jidosha Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
An exhaust purifying apparatus for an in-cylinder injection type internal combustion engine causes exhaust gas temperature to rise reliably, thereby desorbing reliably a sulfur component (SO,) adhered to an NO,catalyst and enhancing the durability of the NO,catalyst. For this reason, the exhaust purifying apparatus for an in-cylinder injection type internal combustion engine comprises an NO,catalyst (,A) for adhering NO,to itself in an excess oxygen concentration condition and desorbing NO,in an oxygen concentration reduction condition, and sulfur component desorption means (,) for desorbing a sulfur component from the NO,catalyst (,A). The sulfur component desorption means (,) injects additional fuel during an expansion stroke in addition to main injection and burns the additional fuel again so that exhaust gas temperature is raised to a predetermined temperature or beyond, whereby the sulfur component is desorbed.