JP2012207553A - Mat for holding exhaust gas treatment carrier, and exhaust gas treatment apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mat for holding an exhaust gas treatment carrier which can suppress the displacement of a carrier to thereby improve sealing properties while maintaining assembling properties and an yield thereof as an exhaust gas treatment apparatus.SOLUTION: The mat 10 for holding the exhaust gas treatment carrier is held between an inner peripheral surface of a tubular shell that is a container of the exhaust gas treatment apparatus, and an outer peripheral surface of a columnar exhaust gas treatment carrier that is enclosed in the shell where granules 15 formed of thermofusible materials are held in a surface 10a to be an opposite surface relative to the inner peripheral surface of the tubular shell by being partially embedded therein such as forming distributed protrusions.

Description

  The present invention relates to an exhaust gas treatment carrier holding mat used for holding an exhaust gas treatment carrier inside an exhaust gas treatment device of an internal combustion engine, and an exhaust gas treatment device assembled using the mat.

  Conventionally, as this type of exhaust gas treatment carrier holding mat, for example, the one described in Patent Document 1 is known. FIG. 6A shows a schematic perspective configuration of such an exhaust gas treatment carrier holding mat, and FIG. 6B shows a cross-sectional structure taken along line EE of FIG. 6A.

  As shown in FIG. 6A, the exhaust gas processing carrier holding mat 100 having a strip shape is provided with a front surface 100a and a back surface 100b which are a pair of planes perpendicular to the thickness direction. The mat 100 itself is formed by laminating inorganic fibers. Further, as shown in FIG. 6 (b), the surface 100a of the mat 100 is subjected to a needling process of repeatedly piercing a plurality of needles attached at a uniform density, so that a uniform uneven structure is formed. Is formed.

  FIG. 7 schematically shows a process in which the exhaust gas treatment carrier on which the exhaust gas treatment carrier holding mat 100 is wound is fitted into a metal shell which is a container of the exhaust gas treatment device.

  As shown in FIG. 7, the columnar exhaust gas treatment carrier 200 inserted from the opening 300e of the cylindrical metal shell 300 has an exhaust gas treatment carrier holding mat 100 on its outer peripheral surface. It is wound so that it may become a table. In addition, the maximum outer diameter DG of the exhaust gas treatment carrier 200 on which the mat 100 is wound is set so as to be slightly larger than the inner diameter DM of the metal shell 300. The exhaust gas treatment carrier 200 around which the mat 100 is wound is inserted into the metal shell 300 in the direction of the arrow ARE while the outer peripheral surface thereof is pressed against the inner peripheral surface 300b of the metal shell 300. At this time, since the uniform uneven structure is formed on the surface 100a of the wound exhaust gas treatment carrier holding mat 100 as described above, the surface 100a of the metal shell 300 is connected to the inner peripheral surface 300b. The contact area is suppressed, and as a result, the frictional force generated in the direction of the arrow ARF between them is also suppressed. In other words, the exhaust gas treatment carrier holding mat 100 can be easily fitted into the metal shell 300 while suppressing the exhaust gas treatment carrier holding mat 100 from falling from the exhaust gas treatment carrier 200, and the assemblability thereof is improved. It becomes like this.

JP 2007-268514 A

  By the way, an exhaust gas treatment device having a structure in which the exhaust gas treatment carrier 200 around which the mat 100 is wound is inserted into a metal shell 300 is usually connected to an exhaust pipe of an in-vehicle internal combustion engine. When connected to the pipe, the exhaust gas processing carrier 200 is pressed by the exhaust gas. In particular, in recent years, exhaust gas treatment apparatuses such as catalytic converters and DPFs (diesel particulate filters) have been increased in size and exhaust gas pressure has been increased with the tightening of exhaust gas regulations. Therefore, in order to suppress the displacement of the exhaust gas treatment carrier 200 in the exhaust gas treatment device and to ensure the sealing performance, the fitting strength of the exhaust gas treatment carrier 200 with respect to the metal shell 300, that is, the exhaust gas treatment carrier 200 is the same. It is necessary to increase the bonding strength with the metal shell 300 including the exhaust gas treatment carrier holding mat 100. However, if the bonding strength with the metal shell 300 is increased in this way, the press-fitting resistance of the mat 100 must be increased. And the decrease in yield cannot be ignored.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an exhaust gas treatment capable of suppressing the shift of the carrier and improving the sealing performance while maintaining the assembly property and the yield as the exhaust gas treatment device. An object of the present invention is to provide a carrier holding mat and an exhaust gas treatment device assembled using the mat.

Hereinafter, means for solving the above-described problems and the effects thereof will be described.
According to the first aspect of the present invention, the exhaust gas that is sandwiched between the inner peripheral surface of a cylindrical shell that is a container of the exhaust gas processing device and the outer peripheral surface of a columnar exhaust gas processing carrier included in the shell. A mat for holding a gas treatment carrier, on which a particle made of a heat-meltable material partially embedded in a manner to form a convex portion is supported on a surface that faces the inner peripheral surface of the shell. This is the gist.

  According to such a configuration as the exhaust gas treatment carrier holding mat, when the exhaust gas treatment carrier is fitted into the shell by the particles distributed as convex portions, the exhaust gas treatment carrier holding mat and the shell The contact area with the peripheral surface is suppressed, and as a result, the frictional force generated between them is also suppressed. For this reason, it becomes possible to improve the assemblability of the exhaust gas treatment device while suppressing the deformation of the exhaust gas treatment carrier holding mat. In addition, since the particles are partially embedded in the above surface, that is, with some protruding from the upper air and the other portions embedded, the particles can be stably supported. Will come to be. In addition, since the particles are made of a heat-meltable material, the contact area between the exhaust gas treatment carrier holding mat and the inner peripheral surface of the shell is expanded by heating the exhaust gas treatment device during assembly. As a result, the frictional force generated between them can be increased. That is, the displacement of the exhaust gas treatment carrier in the shell can be suppressed, and as a result, the sealing performance can be improved.

The invention according to claim 2 is the exhaust gas carrier treatment holding mat according to claim 1, wherein the granules are partially embedded so as to be able to roll in the same direction.
According to such a configuration, by making the direction of rolling coincide with the insertion direction of the exhaust gas treatment carrier, the supported particles become so-called rollers, and the exhaust gas treatment carrier The fitting into the shell is also easier.

The gist of the invention described in claim 3 is the exhaust gas carrier treatment holding mat according to claim 1 or 2, wherein the particles have a spherical shape.
According to such a configuration, the rolling direction of the particles can always coincide with the fitting direction of the exhaust gas treatment carrier, and the particles can be easily supported on the mat.

  According to a fourth aspect of the present invention, in the exhaust gas carrier treatment holding mat according to any one of the first to third aspects, the particles are melted by an exhaust gas temperature when the vehicle-mounted internal combustion engine travels. The gist is that it is made of resin.

  According to such a configuration, in the exhaust gas processing apparatus incorporating the exhaust gas processing carrier holding mat, it is possible to obtain the above-described heating effect of the particles only by incorporating it in the vehicle.

  The invention according to claim 5 is the exhaust gas treatment carrier holding mat according to any one of claims 1 to 4, wherein the mat is made of a fiber assembly, and the granules are the fiber assembly and The gist is that it is partially embedded in a layer containing drying marks of an emulsion that is a binder with the same particles.

  According to such a configuration, while the liquid in which the particles and the emulsion are dispersed is sprayed from the surface that becomes the facing surface of the exhaust gas treatment carrier holding mat, the particles are left on the surface that becomes the facing surface. The emulsion can be impregnated into the fiber assembly. Moreover, it becomes possible to partially embed the particles while drying, and stable support of the particles can be easily realized.

  The invention according to claim 6 is an exhaust gas treatment apparatus in which a columnar exhaust gas treatment carrier is enclosed in a cylindrical shell in a state where its outer peripheral surface is wrapped by an exhaust gas treatment carrier holding mat. The gist of the present invention is to provide the exhaust gas treatment carrier holding mat according to any one of claims 1 to 5 as the gas treatment carrier holding mat.

  According to such a configuration as the exhaust gas treatment device, based on the above-described operational effects as the exhaust gas treatment carrier holding mat, the exhaust gas treatment carrier shifts while improving the assembly property and yield of the exhaust gas treatment device. Suppression and improvement in sealing performance can be achieved.

(A) is a perspective view which shows typically the perspective structure about one Embodiment of the exhaust-gas process support holding mat concerning this invention. (B) is an expanded sectional view which expands and shows the AA cross section of (a). (A)-(d) is sectional drawing which shows typically the manufacture process of the mat | matte for exhaust gas processing support | carrier of the embodiment. (A) is a perspective view which shows typically the perspective structure of the exhaust-gas-treatment carrier by which the exhaust-gas-treatment carrier holding mat of the embodiment was wound. (B) is an expanded sectional view which expands and shows the cross section in the area | region B of (a). (A), (b) is sectional drawing which shows typically the assembly process about one Embodiment of the exhaust gas processing apparatus concerning this invention using the mat | matte for exhaust gas processing support | carrier of the said embodiment. (C) is an expanded sectional view which expands and shows the cross section in the area | region C of (b). (A), (b) is sectional drawing which shows typically the aspect after the assembly | attachment to the internal combustion engine of the exhaust-gas processing apparatus of the embodiment. (C) is an expanded sectional view which expands and shows the cross section in the area | region D of (b). (A) is the perspective view which showed typically the perspective structure about the conventional mat | matte for exhaust gas processing support | carrier. (B) is an expanded sectional view which expands and shows the EE cross section of (a). The perspective view which showed typically the process in which the covering exhaust gas processing support | carrier in which the conventional mat | matte for exhaust gas processing support | carrier holding | wrapping was wound is inserted in a metal shell.

  Hereinafter, an embodiment of an exhaust gas treatment carrier holding mat according to the present invention will be described in detail with reference to FIGS. First, the structure of the exhaust gas processing carrier holding mat of the present embodiment will be described with reference to FIG.

  The exhaust gas treatment carrier holding mat of the present embodiment is wound around an exhaust gas treatment carrier and is formed by laminating inorganic fibers. As shown in FIG. 1A, the strip-shaped exhaust gas treatment carrier holding mat 10 is provided with a front surface 10a and a back surface 10b as a pair of planes perpendicular to the thickness direction.

Here, the structure of the exhaust gas treatment carrier holding mat 10 will be described in more detail based on the enlarged cross-sectional structure along the line AA in FIG.
As shown in FIG. 1 (b), spherical particles 15 partially embedded in a manner in which convex portions are distributed are carried on the surface 10a of the exhaust gas treatment carrier holding mat 10. As shown in FIG. Specifically, for example, the convex portions are distributed and formed so that 30 to 70 particles 15 having a diameter of 0.05 mm to 0.2 mm are carried per square centimeter. The granules 15 are formed of a heat-meltable material that can be melted by the heat of the exhaust gas of the internal combustion engine in the operating state. Further, the exhaust gas processing carrier holding mat 10 is wound so that the outer peripheral surface of the exhaust gas processing carrier, which is generally cylindrical, and the back surface 10b are in close contact with each other.

Next, an example of a method for manufacturing the exhaust gas treatment carrier holding mat 10 will be described in detail with reference to FIG.
First, as shown in FIG. 2A, a mat member 10M is prepared. The mat member 10M is made of a well-known aggregate of inorganic fibers, and the inside thereof is occupied by the dry region 10D.

  Next, as shown in FIG. 2B, a liquid in which the granules 15 and the emulsion EM are dispersed is sprayed onto the surface 10a of the mat member 10M. Incidentally, the liquid is stored in the tank TK while being stirred by the stirrer SB, and the spraying is performed by being jetted from the tip of the pipe P drawn from the tank TK. As a result, the particles 15 are left so as to be uniformly distributed on the surface 10a of the region where the liquid is sprayed, and the emulsion EM penetrates and is impregnated into the mat member 10M. And the area | region where the emulsion EM was impregnated in this way becomes the impregnation area | region 10W.

  Next, as shown in FIG. 2 (c), the surface 10a and the back surface 10b of the mat member 10M sprayed with the liquid over the entire surface 10a are pressed while being heated so as to approach each other and simultaneously blown and dried. More specifically, the particles 15 dispersed and left on the front surface 10a by a known press machine are pushed while being heated so as to be partially embedded in the mat member 10M, and from the front surface 10a indicated by the arrow to the back surface 10b. The water | moisture content of the emulsion EM is removed from the impregnation area | region 10W by ventilation. At this time, it should be noted that the heating is limited to a temperature at which the granules 15 do not melt.

  As a result, as shown in FIG. 2 (d), the particles 15 are partially embedded, that is, the convex portions projecting from the surface 10a are distributed and the other portions are held embedded in the mat member 10M. Will come to be. Further, the inorganic fiber laminated portion (mat material 10M) of the exhaust gas treatment carrier holding mat 10 becomes a dry region 10D from which moisture has been removed from the emulsion EM. In this way, the exhaust gas treatment carrier holding mat 10 in which the granules 15 are partially embedded in the layer including the drying marks of the emulsion EM that is a binder between the inorganic fiber laminated portion (inorganic fiber aggregate) and the granules 15 is obtained. It is done.

Next, the exhaust gas treatment carrier on which the exhaust gas treatment carrier holding mat 10 of the present embodiment manufactured as described above is wound will be described in detail with reference to FIG.
This exhaust gas treatment carrier corresponds to, for example, a filter such as a three-way catalyst used in an in-vehicle gasoline engine or a DPF used in an in-vehicle diesel engine. As shown in FIG. 3A, the exhaust gas processing carrier 20 has an exhaust gas processing carrier holding mat 10 so that the outer peripheral surface 20a and the back surface 10b of the exhaust gas processing carrier holding mat 10 are in close contact with each other. Is wound and tied together. As a result, the outer peripheral surface of the maximum outer diameter portion of the exhaust gas treatment carrier 20 around which the exhaust gas treatment carrier holding mat 10 is wound is the surface 10a of the exhaust gas treatment carrier holding mat 10 manufactured as described above. Become. That is, as shown in FIG. 3 (b), convex portions due to the granules 15 partially embedded as described above are distributed and formed on the outer peripheral surface of the maximum outer diameter portion of the exhaust gas treatment carrier 20. .

  Next, as an operation of the exhaust gas treatment carrier holding mat 10 having the above-described configuration, an effect brought about when the exhaust gas treatment carrier 20 around which the mat 10 is wound is inserted into the metal shell 30 will be described with reference to FIG. Will be described in detail.

  As shown in FIG. 4A, the maximum outer diameter DG of the cylindrical exhaust gas treatment carrier 20 around which the exhaust gas treatment carrier holding mat 10 is wound is slightly larger than the inner diameter DM of the cylindrical metal shell 30. The dimensions are set so that the diameter is expanded. The outer peripheral surface at the maximum outer diameter, that is, the surface 10a of the exhaust gas treatment carrier holding mat 10 is fitted into the metal shell 30 in the direction of the arrow AR1 while being pressed against the inner peripheral surface 30b of the metal shell 30. The At that time, a frictional force (resistance force) is generated between the surface 10a of the exhaust gas treatment carrier holding mat 10 and the inner peripheral surface 30b of the metal shell 30 in the direction of the arrow ARF1 opposite to the arrow AR1. . At this time, the protruding end of the surface 10a is guided by an insertion jig 40 having a shape in which the inner diameter is gradually reduced. That is, since the maximum outer diameter DG of the surface 10a is gradually reduced by the inner diameter of the insertion jig 40, the above insertion can be performed more smoothly than in the case where the insertion jig 40 is not used.

  Then, as shown in FIG. 4B, when the above insertion in the direction of the arrow AR1 is continued, the entire exhaust gas processing carrier holding mat 10 is compressed evenly in the radial direction of the metal shell 30. Become. Here, as described above, the convex portions due to the granules 15 are distributed and formed on the surface 10a of the exhaust gas treatment carrier holding mat 10 in contact with the inner peripheral surface 30b of the metal shell 30, and therefore, the inner peripheral surface 30b. And the frictional force generated between them in the direction of the arrow ARF1 is also suppressed as compared with the case where the convex portions are not distributed.

  Further, in the above insertion process, as shown in FIG. 4C, each particle 15 moves while being pressed against the inner peripheral surface 30b of the metal shell 30, so that each particle 15 in the direction opposite to the arrow AR1. A moment in the direction of the arrow AR2 is generated to try to roll. As a result, due to this moment, each granule 15 is allowed to rotate with the carrying trace that has been partially embedded up to that time as a rotation guide. That is, each of the particles 15 plays a role of a roller that rolls in the direction of the arrow AR2, so that the friction force generated in the direction of the arrow ARF1 is further suppressed.

  Thus, according to the above configuration as the exhaust gas treatment carrier holding mat 10, the exhaust gas treatment carrier 20 is made of a metal while further preventing the inorganic gas laminated portion from being bent or being bent from the exhaust gas treatment carrier 20. It can be easily fitted into the shell 30 and the assemblability as an exhaust gas treatment device is greatly improved.

  Next, as an action of the exhaust gas treatment carrier holding mat 10 having the above-described configuration, an action brought about when an in-vehicle exhaust gas treatment apparatus incorporating the exhaust gas treatment carrier 20 around which the mat 10 is wound is used. This will be described in detail with reference to FIG.

  As shown in FIG. 5 (a), the exhaust gas treatment apparatus immediately after being assembled as a step of mounting the internal combustion engine on the vehicle includes a cylindrical metal shell 30 constituting a part of the exhaust pipe, an exhaust gas Between the gas treatment carriers 20, the respective particles 15 of the exhaust gas treatment carrier holding mat 10 are in a state where they can roll. Thereafter, when the internal combustion engine is operated as the vehicle travels, the particles 15 are exposed to high-temperature exhaust gas discharged from the engine in the direction of the arrow AR3. As a result, as shown in FIG. 5B, due to the heat of the exhaust gas, the binder 15 (not shown) remained in the layer including the dry particles of the particles 15 and the emulsion EM made of the heat-meltable material. Both are melted so that the entire surface 10 a of the exhaust gas treatment carrier holding mat 10 comes into close contact with the inner peripheral surface 30 b of the metal shell 30. More specifically, as shown in FIG. 5 (c), each particle 15 that has separated the surface 10a and the inner peripheral surface 30b and the above-mentioned binder that has cured the layer containing the drying marks of the emulsion EM are melted. Thus, the surface 10a of the exhaust gas treatment carrier holding mat 10 whose flexibility has been restored expands in the direction of the arrow AR4, including the loading traces of the particles 15. As a result, the entire surface 10 a of the exhaust gas treatment carrier holding mat 10 comes into close contact with the inner peripheral surface 30 b of the metal shell 30, so that the exhaust gas treatment carrier 20 is held inside the metal shell 30. A holding force (friction force) is generated in a direction opposite to the direction of the arrow AR3, that is, in the direction of the arrow ARF2. As a result, the displacement of the exhaust gas treatment carrier 20 in the metal shell 30 can be suppressed, and as a result, the sealing performance can be improved.

  In other words, in the exhaust gas processing apparatus having the exhaust gas processing carrier holding mat 10 having the above-described structure, the assembly of the exhaust gas processing apparatus itself and the yield are enhanced by the action of the mat 10, and the exhaust gas processing is performed. The displacement of the exhaust gas processing carrier 20 in the apparatus is suppressed, and the sealing performance is improved.

As described above, according to the exhaust gas processing carrier holding mat or the exhaust gas processing apparatus according to the present embodiment, the effects listed below can be obtained.
(1) From a heat-meltable material partially embedded in a manner in which convex portions are distributed and formed on the surface 10a which is a surface facing the inner peripheral surface 30b of the metal shell 30 of the exhaust gas treatment carrier holding mat 10 The granule 15 to be formed was supported. As a result, when the exhaust gas treatment carrier 20 is fitted into the metal shell 30, the contact area between the surface 10a and the inner peripheral surface 30b can be suppressed, and as a result, the frictional force generated between them can also be suppressed. That is, it becomes possible to improve the assemblability of the exhaust gas treatment device while suppressing the sag of the exhaust gas treatment carrier holding mat 10.

  (2) In the exhaust gas treatment apparatus incorporating the exhaust gas treatment carrier holding mat 10, the convex portions distributed and formed by the granules 15 are melted by heating the granules 15. As a result, the contact area between the surface 10a and the inner peripheral surface 30b is expanded, and as a result, the frictional force generated between them can be increased.

  (3) Due to the moment generated when the exhaust gas treatment carrier 20 is fitted into the metal shell 30, each granule 15 is allowed to rotate using the carrying traces that have been partially embedded until then as a rotation guide. . In other words, the exhaust gas treatment carrier 20 can be more easily fitted into the metal shell 30 because each granule 15 functions as a so-called roller that rolls.

  (4) The particles 15 are formed of a heat-meltable material that is melted by the heat of the exhaust gas of the internal combustion engine in the operating state. Therefore, in the exhaust gas processing apparatus incorporating the exhaust gas processing carrier holding mat 10, it is possible to obtain the above-described heating effect of the particles only by incorporating the apparatus into the vehicle.

  (5) The liquid in which the particles 15 and the emulsion EM are dispersed is sprayed from the surface 10a, and the emulsion EM can be impregnated into the fiber aggregate while the particles 15 are left dispersed on the surface 10a. Further, by drying thereafter, the granules 15 can be uniformly distributed and partially embedded in the layer including the drying mark (binder) of the emulsion EM formed so as to include the surface 10a. Then, after the particles 15 and the binder are melted, the surface 10a and the inner peripheral surface 30b are removed in the exhaust gas treatment apparatus while erasing the support traces of the particles 15 by the restoring force of the fiber aggregate whose flexibility has been recovered. The contact area with can be further expanded.

(6) In the exhaust gas processing apparatus incorporating the exhaust gas processing carrier holding mat 10, the assembly of the exhaust gas processing apparatus itself and the yield are enhanced by the action of the mat 10, and the exhaust gas in the exhaust gas processing apparatus is increased. The shift of the gas processing carrier 20 is suppressed, and the sealing performance is improved.
(Modification)
In addition, the said embodiment can also be implemented with the following aspects.

  In the above embodiment, the granular material 15 has a spherical shape, but is not limited to a true sphere, and may have some unevenness. The shape is not limited to a spherical shape, and may be, for example, a solid shape such as a columnar shape or a barrel shape, or a cylindrical hollow shape. In short, the particles 15 having a shape that easily rolls on the surface 10a may be supported so that the rolling direction coincides with the fitting direction of the exhaust gas processing carrier holding mat 10. Even if it does in this way, the effect according to said (1)-(6) can be acquired.

  -In the above-mentioned embodiment, although the granule 15 was able to roll, it is not restricted to this, The structure which does not roll may be sufficient. That is, the granular material 15 may have a tapered shape such as a conical shape or a pyramid shape, and the tapered portion may form a convex portion. The point is that the contact area between the surface 10a of the mat 10 and the inner peripheral surface 30b of the metal shell 30 may be reduced. In addition, in order to make the insertion of the exhaust gas treatment carrier 20 smooth, it is more desirable that the tip of the convex portion is a curved surface.

  -It is desirable that the temperature at which the granules 15 melt is 150 ° C to 200 ° C. With such a melting temperature, the particles 15 can be melted even with the exhaust gas during the warm-up operation of the internal combustion engine.

  The granule 15 may be not only a material that melts due to the heat of the exhaust gas but also an organic material that burns away. In short, a convex portion is formed on the surface 10a of the mat 10 to reduce the contact area between the surface 10a and the inner peripheral surface 30b of the metal shell 30 when the exhaust gas treatment carrier 20 is fitted, and then the exhaust gas. Any material may be used as long as it can be removed from the surface 10a by the heat and the like, and the original properties as an inorganic fiber aggregate forming the mat member 10M can appear.

  Although the mat member 10M is an inorganic fiber aggregate, specifically, an aggregate of ceramic fibers, glass fibers, or the like is desirable. Further, regardless of whether it is a fiber assembly or not, any material may be used as long as it is flexible and has a function of restoring the original shape when the compressive force is released. In short, even if the particles 15 are melted, the mat material 10M may be made of a flexible material that does not follow the melt and does not melt.

  -The binder which is the drying trace of the emulsion EM has an adhesive force capable of supporting the granules 15 on the surface 10a, and is organic in order to ensure the bendability of the layer including the drying trace. Is desirable. Among these, a latex resin that is excellent in versatility and ease of handling and melts in a temperature range of 150 ° C. to 200 ° C. equivalent to the granules 15 is particularly desirable.

  In the above embodiment, the container into which the exhaust gas treatment carrier 20 is inserted is the metal shell 30, but is not limited thereto, and may be a resin shell having heat resistance, for example.

  DESCRIPTION OF SYMBOLS 10,100 ... Exhaust gas treatment support holding mat, 10a, 100a ... front surface, 10b, 100b ... back surface, 10M ... mat material, 10D ... dry region, 10W ... impregnation region, 15 ... granule, 20,200 ... exhaust Gas treatment carrier, 20a ... outer peripheral surface, 30, 300 ... metal shell, 30b, 300b ... inner peripheral surface, 40 ... fitting jig, 300e ... opening, DG ... maximum outer diameter, DM ... inner diameter, EM ... emulsion, P ... pipe SB ... Stirrer, TK ... Tank.

Claims (6)

In an exhaust gas treatment carrier holding mat sandwiched between an inner peripheral surface of a cylindrical shell that is a container of an exhaust gas treatment device and an outer peripheral surface of a columnar exhaust gas treatment carrier contained in the shell,
Exhaust gas treatment carrier holding, characterized in that particles made of a hot-melt material partially embedded in a manner to form convex portions are distributed on a surface facing the inner peripheral surface of the shell. Mat. The exhaust gas treatment carrier holding mat according to claim 1, wherein the granules are partially embedded so as to be able to roll in the same direction. The exhaust gas treatment carrier holding mat according to claim 1, wherein the granule has a spherical shape. The mat for holding an exhaust gas treatment carrier according to any one of claims 1 to 3, wherein the particles are made of a resin that melts due to an exhaust gas temperature when the vehicle-mounted internal combustion engine runs. In the exhaust gas treatment carrier holding mat according to any one of claims 1 to 4,
The exhaust gas treatment carrier characterized in that the mat is composed of a fiber assembly, and the particles are partially embedded in a layer including a drying mark of an emulsion which is a binder of the fiber assembly and the same particles. Retaining mat. In an exhaust gas treatment apparatus in which a columnar exhaust gas treatment carrier is enclosed in a cylindrical shell with its outer peripheral surface wrapped by an exhaust gas treatment carrier holding mat,
An exhaust gas treatment apparatus comprising the exhaust gas treatment carrier holding mat according to any one of claims 1 to 5 as the exhaust gas treatment carrier holding mat.

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