Exhaust gas-purifying device

a technology of exhaust gas and purification device, which is applied in the direction of machine/engine, magnetic separation, separation process, etc., can solve the problems of clogging of particulate filter, excessive amount of particles, etc., and achieve the effect of reliable burning o
US20070028603A1Inactive Publication Date: 2007-02-08HINO MOTORS LTD
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Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
HINO MOTORS LTD
Publication Date
2007-02-08
Estimated Expiration
Not applicable · inactive patent

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Abstract

Provided is a plasma assisted exhaust emission control device with less electric power consumption and with no harmful gas discharged into atmosphere. A filter body 7 is constituted by porous members through which exhaust gas 2 passes for capturing of particulates in the exhaust gas 2 and is provided with rod-like and cylindrical electrodes 9 and 10 so as to generate plasma in the filter body 7, thereby providing a plasma regenerative particulate filter 11. The particulate filter 11 is accommodated in a filter casing within an exhaust pipe 3. Oxidation catalysts 16 and are arranged respectively upstream and downstream of adjacent to the particular filter 11 in the filter casing 12 so as to obtain heat insulation effect to the particulate filter 11.
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Description

TECHNICAL FIELD

[0001] The present invention relates to an exhaust emission control device for removing particulates in exhaust gas from an internal combustion engine such as diesel engine. BACKGROUND ART

[0002] Particulates or particulate matter discharged from a diesel engine is mainly constituted by carbonic soot and a soluble organic fraction (SOF) of high-boiling hydrocarbon and contains a trace of sulfate (misty sulfuric acid fraction). In order to suppress such kind of particulates from being discharged into atmosphere, it has been envisaged as shown in FIG. 1 that a particulate filter 4 is incorporated in an exhaust pipe 3 through which exhaust gas 2 from a diesel engine 1 flows.

[0003] As detailedly shown in FIG. 2, the particulate filter 4 comprises a filter body 7 in the form of a porous honeycomb made of ceramics such as cordierite. The filter body 7 has passages 5 or grid-like compartments with inlets alternately plugged by plugs 8, the passages 5 with the unplugged inl...

Claims

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