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Catalyst converter and diesel particulate filter system
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A technology of particle filtration and particle filter, which is applied in the direction of catalyst carrier, transportation and packaging, machine/engine, etc. It can solve the problems of poor installation and operability of sealing mat materials, and achieve the effect of excellent cushioning and easy operation
Inactive Publication Date: 2003-05-21
IBIDEN CO LTD
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Problems solved by technology
Therefore, when it is installed in a metal case, the installation workability of the gasket material is not good.
Method used
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Embodiment 1
[0057] For the catalytic converter of the implementation form of the first aspect of the present invention, use figure 1 ~ Figure 4 description.
[0058] Catalyst converter 5 of this example, as figure 1 As shown, it consists of a catalyst carrier 3 carrying a catalyst for purifying exhaust gas components, a metal shell 2 covering the side of the catalyst carrier 3 , and a supporting sealing mat 1 formed of an inorganic fiber mat arranged between the catalyst carrier 3 and the metal shell 2 . The content of the organic component in the supporting gasket material 1 is 0 to 8% by weight. The inorganic fiber mat constituting the supporting gasket material 1 was composed of 70% by weight of alumina and 30% by weight of silica, and was subjected to needle punching treatment. The filling density of the supporting sealing material 1 in the metal shell 2 is 0.35g / m 3 .
[0059] The catalytic converter 5, as shown in FIG. 2, is provided in the middle of the exhaust pipe 91 of the e...
Embodiment 2
[0076] In the catalytic converter of this example related to the first aspect of the invention, a honeycomb cordierite monolith with an outer diameter of 130 mm and a length of 100 mm was used as the catalyst carrier. The catalyst carrier is provided with a plurality of square holes along the axial direction, and porous partition walls supporting catalyst components such as platinum are arranged between each hole.
[0077] In addition, the metal case is made of SUS304 and has a clamshell structure.
[0078] When manufacturing the catalytic converter of this example, as in Example 1, the support gasket is wound on the surface of the catalyst carrier, and then it is installed in the shell parts divided into two parts, and the shell parts are closed and welded into a cylindrical metal shell.
[0079] Others are the same as in Example 1. Also in this example, the same effect as in Example 1 can be obtained.
Embodiment 3
[0081] The metal shell of the catalytic converter of this example related to the first aspect of the invention is a coiled structure.
[0082] After winding the support gasket on the surface of the catalyst carrier, a thin metal plate with a thickness of 1.5 mm, a width of 141 mm, and a length of 120 mm was wound several times on the surface.
[0083] Others are the same as embodiment 1. In this example as well, the same effect as in Example 1 can be obtained. Test example 1
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Abstract
The present invention provides a catalyst converter permitting an easy mounting of a catalyst holder into a metal shell and having a holding seal material, for the catalyst holder, excellent in a cushioning property; and a diesel particulate filter system permitting an easy mounting of a diesel particulate filter into a metal shell and having a holding seal material excellent in a cushioning property. The catalyst converter comprises a catalyst holder, metal shell covering the holder externally, and a holding seal material disposed between the holder and the shell, wherein the holding seal material consists of an inorganic fiber mat needle-punched at a density of 50-3000 pieces per 100 cm<2> with the content of an organic matter greatly exceeding zero and being up to 2 wt.%, and delivers a surface pressure of 5-500 kPa when heated to 300-1000 DEG C at a filling density of 0.15-0.45 g / cm<3>, this holding seal material also being able to be used for a holding seal material for holding a diesel particulate filter.
Description
technical field [0001] The invention relates to an exhaust gas purification device, in particular to a support sealing material for supporting a catalyst carrier in a catalytic converter and a support sealing material for supporting a diesel particulate filter in a diesel particulate filtering system. Background technique [0002] In the exhaust system of the automobile engine, in order to purify the exhaust gas components, an exhaust gas purification device is installed. Exhaust gas purifying devices include catalytic converters, diesel particulate filter (hereinafter also referred to as DP filter) systems, and the like. [0003] The catalytic converter purifies exhaust gas components (hydrocarbons, carbon monoxide, nitrogen oxides, etc.) discharged from a gasoline engine or a diesel engine. The catalytic converter is composed of a ceramic catalyst carrier carrying a catalyst for purifying exhaust gas components and a metal case housing the carrier. A supporting sealing m...
Claims
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Application Information
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