US Patent 7181903 Exhaust gas purifying apparatus and method of using the same

Patent 7181903 was granted and assigned to Toyota on February, 2007 by the United States Patent and Trademark Office.

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Patent

Patent attributes

Current Assignee

Toyota

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

7181903

Date of Patent

February 27, 2007

Patent Application Number

10845161

Date Filed

May 14, 2004

Patent Primary Examiner

‌

Binh Q Tran

Patent abstract

The present invention relates to an exhaust gas purifying apparatus comprising a plasma reactor containing at least one of a H2O adsorbent and a HC adsorbent; and a NOx adsorbent located downstream of said plasma reactor. Further, the present invention relates to an exhaust gas purifying apparatus comprising a plasma reactor containing at least one of a H2O adsorbent and a HC adsorbent, and a NOx adsorbent. Still further, the present invention relates to a method using the present apparatus. According to the present apparatus, by generating plasma in the plasma reactor, H2O trapped on the H2O adsorbent is activated to be a strong oxidant such as OH radical and O radical, and HC trapped on the HC adsorbent is activated to be radicals, lower HCs, etc.

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