Exhaust gas purifier
AssigneeIsuzu Ceramics Institute Co., Ltd.
InventorHideo Kawamura
Life of this patent
Estimating the term…
Abstract
The present invention provides an exhaust gas purifier for collecting particulates with fiber filters while reducing NO.sub.x by the action of granulated materials disposed on the outer sides of the fiber filters and having an NO.sub.x -reducing action. In this exhaust gas purifier, the fiber filters for collecting particulates contained in exhaust gas are constituted of a randomly laminated nonwoven fabric, and electric wire nets are disposed on the inner sides of the fiber filters. The granulated materials made of Ba.sub.3 Y.sub.4 O.sub.9, BaLa.sub.2 O.sub.4 or Ba.sub.2 In.sub.2 O.sub.5 having an NO.sub.x -reducing action are filled in a large numbers of cells of porous members disposed on the downstream sides of the fiber filters.
Claims7
An exhaust gas purifier comprising filter members for collecting particulates contained in exhaust gas discharged from a diesel engine;
- electric wire nets disposed upstream of said filter members in the direction of an exhaust gas flow;
- porous members disposed downstream of said filter members, made of a ceramic, and having a plurality of cells;
- and granulated materials made of a compound filled in said cells of said porous members and having a brownmillerite structure having an NO.sub.x -reducing action.
Dependencies are inferred from the claim text.