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:
Jul. 24, 2007
Filed:
Jul. 19, 2005
Masahiro Takaya, Yokosuka, JP;
Shinji Yamamoto, Yokosuka, JP;
Hiroaki Kaneko, Yokohama, JP;
Hitoshi Onodera, Yokosuka, JP;
Masahiro Takaya, Yokosuka, JP;
Shinji Yamamoto, Yokosuka, JP;
Hiroaki Kaneko, Yokohama, JP;
Hitoshi Onodera, Yokosuka, JP;
Nissan Motor Co., Ltd., Yokohama-shi, JP;
Abstract
An exhaust gas purifying system of the present invention comprises a first catalyst which contains a noble metal and reduces hydrocarbons contained in exhaust gas, and a second catalyst which is disposed downstream of the first catalyst and contains β-zeolite. In the exhaust gas purifying system, a mixed gas having an air-fuel ratio of not less than 25 is burned in an internal combustion engine, and the internal combustion engine discharges the exhaust gas having an oxygen concentration of not less than 4% continuously or intermittently.