JP2018059460A - Exhaust emission control device and manufacturing method of exhaust emission control device - Google Patents

Abstract

An exhaust emission control device capable of protecting exhaust wires and purifying exhaust gas immediately after starting an engine is provided. An exhaust emission control device is installed in an exhaust gas passage of an internal combustion engine and has a monolith carrier provided with a partition wall that divides the exhaust gas passage into a plurality of cells, and an exhaust gas that is carried on the surface of the partition wall and flows through the plurality of cells. An exhaust purification device comprising a catalyst for detoxifying harmful components contained in a gas, a heating wire inserted into at least one of a plurality of cells from the downstream side of the monolith carrier, and a plurality of heating wires inserted And a lid that closes at least one upstream side of the plurality of cells, and a control device that controls energization of the heating wire. [Selection] Figure 4

Description

  The present disclosure relates to an exhaust purification device and a method for manufacturing the exhaust purification device.

  Patent Documents 1 and 2 propose an exhaust purification device that enables exhaust gas purification immediately after the engine is started.

  Patent Document 1 discloses a holder that is made of a thick disk-shaped ceramic honeycomb formed of the same process and the same material as the filter and carries catalyst particles. The holder has a large number of cells (ventilation holes) that are open at both ends, and is accommodated at the downstream end of the cylinder via a mat made of expansive ceramic. The downstream end surface of the mat (and the outer periphery of the holder) is in contact with the annular plate (first annular plate). An annular plate (second annular plate) is fixed to the cylinder, and the annular plate (second annular plate) holds the mat and the holder together with the annular plate (third annular plate). The heating wire is composed of a bare Kanthal wire having a large number of bent portions extending in a U-shape, and each bent portion is individually inserted into each cell from the downstream end face of the holder. The heating wires extend in the lateral direction along the upstream end surface of the holder, and each heating wire has a large number of U-shaped bent portions that are individually accommodated in the cells of the holder. These heating wires are connected in series or in parallel to form a heating wire. Also, some of the cells that accommodate the bent portions are filled with a ceramic heat-resistant sealing material, and the heating wire is fixed by the cured ceramic heat-resistant sealing material.

  Patent Document 2 is composed of a bare Kanthal wire having a large number of bent portions extending in a U shape downstream, and each bent portion is individually inserted into each cell from the upstream end face of the holder. A heating wire is disclosed. The heating wires extend in the lateral direction along the upstream end face of the holder, and each heating wire has a large number of U-shaped bent portions that are individually accommodated in the cells of the holder. Each heating wire is connected in series or in parallel to form a heating wire. Also, some of the cells that accommodate the bent portion are filled with a ceramic heat resistant sealing material, and the heating wire is fixed by the cured ceramic heat resistant sealing material.

JP-A-7-127435 JP-A-7-127432

  In the exhaust emission control device disclosed in Patent Document 1, a heating wire is inserted from the downstream end surface of the holder, and the bent portion is fixed to the downstream end surface of the holder by a ceramic heat-resistant sealing material. Therefore, in the exhaust gas purification device disclosed in Patent Document 1, the ceramic heat-resistant sealing material is provided on the downstream side of the heating wire, and the heating wire is exposed to the exhaust gas, and the heating wire cannot be protected. .

  In the exhaust emission control device disclosed in Patent Document 2, a heating wire is inserted from the upstream end surface of the holder, and the bent portion is fixed by a ceramic heat resistant sealing material on the upstream end surface of the holder. Therefore, in the exhaust gas purifying device disclosed in Patent Document 2, the ceramic heat-resistant sealing material is provided on the upstream side of the heating wire, but the heating wire is inserted from the upstream end surface of the holder, so that it is bent. The part is exposed to the exhaust gas, and the heating wire cannot be protected.

  In view of the above circumstances, at least one embodiment of the present invention provides an exhaust purification device and a method for manufacturing an exhaust purification device that protects a heating wire and can purify exhaust gas immediately after starting an internal combustion engine. With the goal.

  (1) An exhaust emission control device according to at least one embodiment of the present invention includes a monolith support provided in an exhaust gas passage of an internal combustion engine and provided with a partition wall that divides the exhaust gas passage into a plurality of cells, and a surface of the partition wall And a catalyst that renders harmful components contained in exhaust gas flowing through the plurality of cells harmless, and is inserted into at least one of the plurality of cells from the downstream side of the monolith support A heating wire, a lid provided at the upstream end of the cell into which the heating wire is inserted, and closing the upstream end of the cell, and an energization control device capable of controlling energization to the heating wire. Prepare.

  According to the configuration of (1) above, the lid is provided at the upstream end of the cell into which the heating wire is inserted, and the heating wire can be protected by closing the upstream end of the cell. Further, since the monolith carrier is heated by energizing the heating wire and the catalyst carried on the monolith carrier is activated, the exhaust gas can be purified immediately after the internal combustion engine is started.

(2) In some embodiments, in the configuration of (1), the heating wire is inserted to the upstream side of the at least one cell.
According to the configuration of (2) above, the upstream side of the monolith carrier is heated by energizing the heating wire, and the catalyst carried on the upstream side of the monolith carrier is activated, so that the exhaust gas is efficiently purified. be able to.

(3) In some embodiments, in the configuration of (1) or (2), the heating wires are densely arranged on the upstream side of the cell.
According to the configuration of (3) above, since the upstream side of the monolith support is heated early by energizing the heating wire, and the catalyst supported on the upstream side of the monolith support is activated early, the exhaust gas is more It can be purified efficiently.

(4) In some embodiments, in any one of the configurations (1) to (3), the heating wire is folded toward the downstream side of the cell on the upstream side of the cell.
According to the configuration of (4) above, the end of the heating wire can be taken out from the downstream end of the cell.

(5) In some embodiments, in the configuration according to any one of (1) to (4) above, the cross-sectional area of the cell closed by the lid is 5% or less of the total cross-sectional area of all the cells. It is.
According to the configuration of (5) above, since the cross-sectional area of the cell closed by the lid is 5% or less of the total cross-sectional area of all the cells, the influence on the exhaust gas purification performance can be suppressed. .

  (6) A method of manufacturing an exhaust emission control device according to at least one embodiment of the present invention includes: a monolith carrier provided in an exhaust gas passage of an internal combustion engine, and provided with a partition wall that divides the exhaust gas passage into a plurality of cells; And a catalyst for detoxifying harmful components contained in exhaust gas flowing through the plurality of cells supported on the surface of the partition wall, and a manufacturing method of the monolith support for manufacturing the monolith support. A lid forming step for forming a lid for closing the cell at the upstream end of the monolith carrier manufactured in the monolith carrier manufacturing step, and a lid other than a specific cell among the lids formed in the lid forming step A lid removing step for removing the lid that closes the cell, and a catalyst carrying step for carrying the catalyst on the monolith carrier from which the lid that closes the cells other than the specific cell is removed in the lid removing step. , And a heating wire interconnection step of inserting the heating wire to the particular cell from the downstream end of the monolithic carrier catalyst is supported by the catalyst supporting step.

  According to the above method (6), the lid for closing the cell is formed at the upstream end of the monolith carrier in the lid forming step, and the lid for closing the cells other than the specific cell is removed in the lid removing step. . In the catalyst supporting step, the catalyst is supported on the monolith support from which the lid that closes the cells other than the specific cells is removed. Thereafter, a heating wire is inserted into a specific cell from the downstream end of the monolith carrier on which the catalyst is supported in the heating wire wiring process. Thereby, according to the method of (6) above, an exhaust purification device that can protect the heating wire that closes the upstream end of the cell and purify the exhaust gas immediately after the start of the internal combustion engine is efficiently manufactured. Can do. As a result, the exhaust emission control device manufactured by this method can protect the heating wire by the lid that closes the upstream end of the cell, and can purify the exhaust gas immediately after starting the internal combustion engine.

  According to at least one embodiment of the present invention, the heating wire can be protected by the lid that closes the upstream end of the cell, and the exhaust gas can be purified immediately after the internal combustion engine is started.

It is a mimetic diagram showing roughly the composition of the internal-combustion engine to which the exhaust emission control device concerning the embodiment of the present invention was applied. 1 is a perspective view schematically showing an exhaust emission control device according to an embodiment of the present invention. It is the III-III sectional view taken on the line of the exhaust gas purification apparatus shown in FIG. FIG. 4 is a sectional view of the exhaust purification device shown in FIG. 2 taken along the line IV-IV-IV. 1 is a perspective view schematically showing an exhaust emission control device according to an embodiment of the present invention. FIG. 6 is a cross-sectional view taken along line VI-VI of the exhaust purification device shown in FIG. 5. It is the VII-VII-VII sectional view taken on the line of the exhaust gas purification apparatus shown in FIG. 1 is a plan view schematically showing an exhaust emission control device according to an embodiment of the present invention. 1 is a longitudinal sectional view schematically showing an exhaust emission control device according to an embodiment of the present invention. 1 is a longitudinal sectional view schematically showing an exhaust emission control device according to an embodiment of the present invention. 1 is a longitudinal sectional view schematically showing an exhaust emission control device according to an embodiment of the present invention. 1 is a plan view schematically showing an exhaust emission control device according to an embodiment of the present invention. 1 is a plan view schematically showing an exhaust emission control device according to an embodiment of the present invention. 1 is a plan view schematically showing an exhaust emission control device according to an embodiment of the present invention. It is explanatory drawing for demonstrating the manufacturing method of the exhaust gas purification apparatus which concerns on one Embodiment of this invention. It is explanatory drawing for demonstrating the manufacturing method of the monolith carrier which concerns on one Embodiment of this invention.

  Hereinafter, some embodiments of the present invention will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of the components described in the embodiments or shown in the drawings are not intended to limit the scope of the present invention, but are merely illustrative examples. Absent.

  FIG. 1 is a schematic diagram schematically showing the configuration of an internal combustion engine 100 to which an exhaust gas purification apparatus according to an embodiment of the present invention is applied. FIG. 2 is a perspective view schematically showing an exhaust purification device 1 according to an embodiment of the present invention. 3 is a cross-sectional view taken along the line III-III of the exhaust purification device 1 shown in FIG. 2, and FIG. 4 is a cross-sectional view taken along the line IV-IV-IV of the exhaust purification device 1 shown in FIG. FIG. 5 is a perspective view schematically showing the exhaust purification device 1 according to one embodiment of the present invention. 6 is a sectional view taken along the line VI-VI of the exhaust purification device 1 shown in FIG. 5, and FIG. 7 is a sectional view taken along the line VII-VII-VII of the exhaust purification device 1 shown in FIG.

As shown in FIG. 1, an exhaust purification device 1 according to an embodiment of the present invention is installed in an exhaust gas passage 200 of an internal combustion engine 100 (for example, a diesel engine). The exhaust purification device 1 includes a monolith carrier 2 and a catalyst 3.
As shown in FIGS. 2 to 7, the monolithic carrier 2 is also called a honeycomb carrier, and is provided with partition walls 22 that divide the exhaust gas passage 200 into a plurality of cells 21. The cell 21 is penetrated from the upstream end to the downstream end in the exhaust gas flow direction. The monolith carrier 2 is made of, for example, porous cordierite having a small coefficient of thermal expansion. The monolithic carrier 2 is manufactured, for example, by drying and firing a honeycomb extruded product.
The catalyst 3 can detoxify harmful components contained in the exhaust gas flowing through the plurality of cells 21, and the catalyst 3 is supported on the surface of the partition wall 22 of the monolith carrier 2.

  As shown in FIGS. 2 to 7, the exhaust emission control device 1 according to the embodiment of the present invention includes a heating wire 4 inserted into at least one of the plurality of cells 21 from the downstream side of the monolith carrier 2, and a heating wire 4. The lid 5 is provided at the upstream end of the cell 21 into which is inserted, and closes the upstream end of the cell 21, and the energization control device 6 that can control the energization of the heating wire 4.

  According to the exhaust gas purification apparatus 1 according to the above-described embodiment of the present invention, the lid body 5 is provided at the upstream end where the heating wire 4 is inserted. The hot wire 4 can be protected. In addition, when the heating wire 4 is energized, the partition walls 22 separating the cells 21 in which the heating wires 4 are inserted are heated, and the catalyst 3 supported on the partition walls 22 of the monolith carrier 2 is activated. As a result, the exhaust gas is purified by the cell 21 in which the heating wire 4 is not inserted. Thus, according to the above-described exhaust gas purification apparatus 1 according to the embodiment of the present invention, the monolith carrier 2 is heated and the catalyst 3 supported on the monolith carrier 2 is activated. The exhaust gas can be purified.

  As shown in FIG. 2 to FIG. 7, in the exhaust gas purification apparatus 1 according to some embodiments, the monolith carrier 2 has a plurality of cells 21 arranged in a grid pattern, and the heating wires 4 are arranged in a grid pattern. Inserted into at least one of the cells 21. For example, as shown in FIGS. 2 to 4, the cell 21 into which the heating wire 4 is inserted has a plurality of cells 21 along the wiring path, and these cells 21 communicate with each other. Alternatively, for example, as shown in FIGS. 5 to 7, a plurality of cells 21 may be independent along the wiring path, and the plurality of cells 21 may not communicate with each other. The lid 5 is provided at the upstream end of the cell 21 into which the heating wire 4 is inserted among the cells 21 arranged in a lattice shape, and the lid 5 closes the upstream end of the cell 21.

As shown in FIGS. 2 and 7, in the exhaust purification device 1 according to some embodiments, the heating wire 4 is inserted to the upstream side of the cell 21.
According to the exhaust gas purification apparatus 1 according to the above-described embodiment, the upstream side of the monolith carrier 2 is heated by energizing the heating wire 4, and the catalyst 3 supported on the upstream side of the monolith carrier 2 is activated. Exhaust gas can be purified efficiently.

As shown in FIGS. 2 and 7, in the exhaust purification apparatus 1 according to some embodiments, the heating wire 4 is folded toward the downstream side of the cell 21 on the upstream side of the cell 21.
According to the exhaust gas purification apparatus 1 according to the embodiment described above, the end of the heating wire 4 can be taken out from the downstream end of the cell 21.

As shown in FIGS. 2 to 4, in the exhaust gas purification apparatus 1 according to some embodiments, the monolith carrier 2A has a plurality of cells 21 along the wiring path of the heating wire 4A. 21 communicate with each other. Thus, in the monolith carrier 2A in which the plurality of cells 21 are one along the wiring path of the heating wire 4A and the plurality of cells 21 communicate with each other, the heating wire 4A has one plurality of cells 21. It is wired upstream of the cell 21.
According to the exhaust gas purification apparatus 1 according to the above-described embodiment, the heating wire 4A is wired upstream of the cell 21 in which the plurality of cells 21 are united, so that the heating wire 4A is energized by energizing the heating wire 4A. The partition walls 22 separating the inserted cells 21 are heated on the upstream side, and the catalyst 3 supported on the partition walls 22 of the monolith carrier 2A is activated. Thereby, exhaust gas can be efficiently purified on the upstream side of the cell 21 in which the heating wire 4A is not inserted.

As shown in FIGS. 5 to 7, in the exhaust gas purification apparatus 1 according to some embodiments, the monolith carrier 2B includes a plurality of cells 21 that are independent along the wiring path of the heating wire 4B. Are not in communication with each other. Thus, in the monolith carrier 2B in which the plurality of cells 21 are independent along the wiring path of the heating wire 4B and the plurality of cells 21 do not communicate with each other, the heating wire 4B is one by one of the plurality of cells 21. Inserted individually.
According to the exhaust gas purification apparatus 1 according to the above-described embodiment, the heating wire 4B is individually inserted into each of the plurality of independent cells 21 along the wiring path, so that the heating wire 4B is energized. The partition 22 which divides the cell 21 in which the heating wire 4B is inserted is heated as a whole. Thereby, exhaust gas can be efficiently purified in the whole cell 21 in which the heating wire 4B is not inserted.

  In the exhaust gas purification apparatus 1 according to the embodiment of the present invention, the wiring path of the heating wire 4 can be arbitrarily set. For example, as shown in FIG. 2 to FIG. 7, the wiring path of the heating wire 4 can be provided so as to be a single stroke in a U-shape in plan view. Thereby, the wiring path of the heating wire 4 can be set so as to efficiently purify the exhaust gas in consideration of the flow of the exhaust gas.

  FIG. 8 is a plan view schematically showing the exhaust purification device 1 according to one embodiment of the present invention. 9 to 11 are longitudinal sectional views schematically showing the exhaust purification device 1 according to an embodiment of the present invention.

As shown in FIG. 8, in the exhaust purification apparatus 1 according to some embodiments, the heating wires (not shown) are arranged in three rows in parallel and at equal intervals, and the cells on the wiring path of the heating wires A lid 5 </ b> C is provided at the upstream end of 21, and the lid 5 </ b> C closes the upstream ends of these cells 21.
According to the exhaust emission control device 1 according to the above-described embodiment, the wiring path of the heating wire is simple, and the heating wire can be wired relatively easily.

As shown in FIG. 9, in the exhaust purification apparatus 1 according to some embodiments, the heating wire 4D has a linear wiring path, and a plurality of cells 21 become one along the linear wiring path. The plurality of cells 21 communicate with each other. In this embodiment, the heating wire 4D is wired in a rectangular frame shape.
According to the exhaust gas purification apparatus 1 according to the embodiment described above, the wiring path of the heating wire 4D is simple, and the heating wire 4D can be wired relatively easily.

As shown in FIGS. 10 and 11, in the exhaust purification apparatus 1 according to some embodiments, the heating wires 4 </ b> E and 4 </ b> F are densely arranged on the upstream side of the cell 21.
According to the exhaust emission control device 1 according to the above-described embodiment, the upstream side of the monolith carriers 2E and 2F is heated early by energizing the heating wires 4E and 4F, and the catalyst supported on the upstream side of the monolith carriers 2E and 2F. Since 3 is activated early, the exhaust gas can be purified more efficiently.

As shown in FIG. 10, in the exhaust gas purification apparatus 1 according to some embodiments, the heating wires 4E are densely arranged on the upstream side of the cell 21 by turning back a plurality of times along the flow direction of the exhaust gas.
According to the exhaust gas purification apparatus 1 according to the above-described embodiment, the heating wire 4E can be easily inserted into the cell 21 in which the plurality of cells 21 become one along the linear wiring path. It can be concentrated on the upstream side of the cell 21.

As shown in FIG. 11, in the exhaust purification apparatus 1 according to some embodiments, the heating wires 4F are densely arranged on the upstream side of the cell 21 by turning back multiple times in a direction orthogonal to the flow direction of the exhaust gas. The
According to the exhaust gas purification apparatus 1 according to the above-described embodiment, the heating wire 4F can be easily inserted into the cell 21 in which the plurality of cells 21 become one along the linear wiring path. They can be evenly arranged on the upstream side of the cells 21.

12 to 14 are plan views of the exhaust emission control device 1 according to one embodiment of the present invention.
As shown in FIG. 12, in the exhaust emission control apparatus 1 according to some embodiments, heating wires (not shown) are arranged to form a triangle in plan view. Then, a lid 5G is provided at the upstream end of the cell 21 on the wiring path of the heating wire 4, and the lid 5G closes the upstream end of these cells 21. In this embodiment, the plurality of cells 21 are independent along the wiring path of the heating wire, and the plurality of cells 21 do not communicate with each other.
According to the exhaust gas purification apparatus 1 according to the above-described embodiment, the monolith carrier 2 can be heated uniformly.

As shown in FIGS. 13 and 14, in the exhaust gas purification apparatus 1 according to some embodiments, the heating wire (not shown) is arranged to form a letter “B” in plan view. Then, lid bodies 5H and 5I are provided at the upstream ends of the cells 21 on the wiring path of the heating wire, and the lid bodies 5H and 5I close the upstream ends of these cells 21.
According to the exhaust gas purification apparatus 1 according to the above-described embodiment, a heating wire can be arranged in view of the flow of exhaust gas.

As shown in FIG. 13, the exhaust gas purification apparatus 1 according to some embodiments is configured such that a plurality of cells 21 become one along the wiring path, and the plurality of cells 21 communicate with each other.
As shown in FIG. 14, the exhaust gas purification apparatus 1 according to some embodiments is configured such that a plurality of cells 21 are independent along the wiring path, and the plurality of cells 21 do not communicate with each other.

In the exhaust emission control device 1 according to some embodiments, the cross-sectional area of the cell 21 closed by the lid 5 (5C, 5G, 5H) is 5% or less of the total cross-sectional area of all the cells 21.
According to the exhaust purification device 1 according to the above-described embodiment, the cross-sectional area of the cells 21 closed by the lid body 5 is 5% or less of the cross-sectional area of all the cells 21, and thus the influence on the exhaust gas purification performance. Can be suppressed.

FIG. 15 is an explanatory diagram for explaining a method of manufacturing the exhaust gas purification apparatus 1 according to one embodiment of the present invention.
As shown in FIG. 15, the method for manufacturing the exhaust purification apparatus 1 according to the embodiment of the present invention is the method for manufacturing the exhaust purification apparatus 1 according to the embodiment of the present invention described above. As described above, the exhaust emission control device 1 according to the embodiment of the present invention includes the monolith carrier 2 and the catalyst 3.

The manufacturing method of the exhaust emission control device 1 according to the embodiment of the present invention includes a monolith carrier manufacturing process (step S1), a lid forming process (step S2), a lid removing process (step S3), and a catalyst supporting process (step S4). And a heating wire wiring step (step S5).
The monolith carrier production process (step S1) is a process for producing the monolith carrier 2, and includes an extrusion process, a drying process, and a baking process.
The lid forming step (step S2) is a step of forming the lid 5 that closes the cell 21 at the upstream end of the monolith carrier 2 manufactured in the monolith carrier manufacturing step (step S1). It is formed by immersing the upstream end in the same liquid L1 as the monolith carrier 2.
The lid removing step (step S3) is a lid that closes the cells 21 other than the specific cells 21 (cells 21 to which the heating wires 4 are wired) in the lid 5 formed in the lid forming step (step S2). This is a process of removing the body 5 and is performed using, for example, a laser processing machine.
The catalyst supporting step (step S4) is a step of supporting the catalyst 3 on the monolith carrier 2 from which the lid 5 that closes the cells 21 other than the specific cells 21 is removed in the lid removing step (step S3). This is performed by immersing the monolith support 2 in the slurry L2 in which the catalyst 3 is dissolved.
The heating wire 4 wiring step (step S5) is a step of inserting the heating wire 4 into the specific cell 21 from the downstream end of the monolith carrier 2 on which the catalyst 3 is supported in the catalyst supporting step (step S4).

  According to the method of manufacturing the exhaust gas purification apparatus 1 according to the embodiment of the present invention described above, the lid body 5 that closes the cell 21 is formed at the upstream end of the monolith carrier 2 in the lid body forming step (step S2). In the removal step (step S3), the lid 5 that closes the cells 21 other than the specific cell 21 is removed. Then, the catalyst 3 is supported on the monolith carrier 2 from which the lid 5 that closes the cells 21 other than the specific cells 21 is removed in the catalyst supporting step (step S4). Thereafter, the heating wire 4 is inserted into the specific cell 21 from the downstream end of the monolith carrier 2 on which the catalyst 3 is supported in the heating wire 4 wiring step (step S5). Thereby, according to the manufacturing method of the exhaust gas purification apparatus 1 according to the embodiment of the present invention, the heating wire 4 that closes the upstream end of the cell 21 is protected, and the exhaust gas can be purified immediately after the internal combustion engine 100 is started. The possible exhaust purification device 1 can be efficiently manufactured. As a result, the exhaust emission control device 1 manufactured by this method can protect the heating wire 4 by the lid 5 that closes the upstream end of the cell 21 and can purify the exhaust gas immediately after the internal combustion engine 100 is started.

FIG. 16 is an explanatory diagram for explaining a method of manufacturing the monolith carrier 2 according to the embodiment of the present invention.
In the manufacturing method of the exhaust gas purification apparatus 1 according to some embodiments, the monolith carrier 2 is manufactured by extrusion molding, and a plurality of cells 21 are formed along the wiring path of the heating wire 4. In the monolith carrier 2 in which the plurality of cells 21 communicate with each other, a plurality of cells 21 are integrated from the beginning, and the plurality of cells 21 communicate.
As shown in FIG. 16, in the manufacturing method of the monolithic carrier 2 according to some embodiments, the monolithic carrier 2 is a partition that separates the cells 21 by extruding a kneaded material made of cordierite from the base N. 22 is molded. Then, by devising the base N, the plurality of cells 21 become one, and the monolith carrier 2 that communicates with the plurality of cells 21 is formed.

  The present invention is not limited to the above-described embodiments, and includes forms obtained by modifying the above-described embodiments and forms obtained by appropriately combining these forms.

1 Exhaust purification device 2, 2A, 2B, 2E, 2F Monolithic carrier 21 Cell 22 Partition 22
3 Catalyst 4, 4A, 4B, 4D, 4E, 4F Heating wire 5, 5C, 5G, 5H, 5I Lid 6 Energization control device 100 Internal combustion engine 200 Exhaust gas passage N Nozzle

Claims (6)

A monolith carrier installed in an exhaust gas passage of an internal combustion engine and provided with a partition wall that divides the exhaust gas passage into a plurality of cells, and a harmful component contained in the exhaust gas carried on the surface of the partition wall and flowing through the plurality of cells An exhaust purification device comprising a catalyst for detoxifying
A heating wire inserted into at least one of the plurality of cells from the downstream side of the monolith support;
A lid that is provided at the upstream end of the cell into which the heating wire is inserted and closes the upstream end of the cell;
An energization control device capable of controlling energization to the heating wire;
An exhaust emission control device comprising:   The exhaust gas purification apparatus according to claim 1, wherein the heating wire is inserted to an upstream side of the at least one cell.   The exhaust gas purification apparatus according to claim 1 or 2, wherein the heating wire is densely arranged on the upstream side of the cell.   The exhaust gas purification apparatus according to any one of claims 1 to 3, wherein the heating wire is folded toward the downstream side of the cell on the upstream side of the cell.   The exhaust emission control device according to any one of claims 1 to 4, wherein a cross-sectional area of the cell closed by the lid is 5% or less of a total cross-sectional area of all the cells. A monolith carrier installed in an exhaust gas passage of an internal combustion engine and provided with a partition wall that divides the exhaust gas passage into a plurality of cells, and a harmful component contained in the exhaust gas carried on the surface of the partition wall and flowing through the plurality of cells A method for producing an exhaust gas purification device comprising:
A monolith support manufacturing process for manufacturing the monolith support;
A lid forming step for forming a lid for closing the cell at the upstream end of the monolith carrier manufactured in the monolith carrier manufacturing step;
A lid removing step for removing a lid that closes a cell other than a specific cell among the lids formed in the lid forming step;
A catalyst supporting step of supporting the catalyst on a monolith carrier from which the lid that closes the cells other than the specific cells in the lid removing step is removed;
A heating wire wiring step of inserting a heating wire into the specific cell from the downstream end of the monolith support on which the catalyst is supported in the catalyst supporting step;
An exhaust purification device manufacturing method comprising:

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