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. 22, 2001
Filed:
Jul. 27, 1999
Shinya Hirota, Susono, JP;
Toshiaki Tanaka, Numazu, JP;
Nobumoto Ohashi, Susono, JP;
Kazuhiro Itoh, Mishima, JP;
Eiji Iwasaki, Susono, JP;
Kouji Yoshizaki, Numazu, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
According to the present invention, there is provided an exhaust gas purification device, comprising a NO,absorbent arranged in an exhaust passage of an engine for absorbing NO,therein when an air-fuel ratio of an exhaust gas flowing into the NO,absorbent is lean, the NO,absorbent discharging NO,absorbed therein when a concentration of the oxygen in the exhaust gas flowing into the NO,absorbent decreases, a trapping element arranged in the exhaust passage upstream of the NO,absorbent for trapping particulates, a processing element for processing the particulates trapped in the trapping element to regenerate the trapping element, and a preventing element for preventing the exhaust gas from flowing into the NO,absorbent from the trapping element when the trapping element is regenerated.