JP5691773B2 - Catalytic converter device - Google Patents

Description

  The present invention relates to a catalytic converter device provided in an exhaust pipe of an internal combustion engine.

  In a catalytic converter device provided in an exhaust pipe for purifying exhaust gas generated in an internal combustion engine, for example, as described in Patent Document 1, a heating element is used as a base material supporting a catalyst, and the base material is energized. Some are designed to generate heat. By heating the base material (catalyst carrier) by energization in this way, the catalyst carrier can be heated at an early stage even when the temperature of the exhaust is low.

  By the way, the exhaust contains carbon. If carbon adheres to the catalyst carrier or the cylinder in which the catalyst carrier is accommodated, the electrical resistance between the cylinder (metal shell) and the catalyst carrier is reduced by the carbon, and the current supply efficiency to the catalyst carrier is reduced. (Heating efficiency) decreases.

Japanese Utility Model Publication No. 49-12412

  In view of the above facts, an object of the present invention is to obtain a catalytic converter device capable of suppressing a decrease in efficiency of energization to a catalyst carrier due to carbon contained in exhaust gas.

  In the first aspect of the present invention, a catalyst carrier for purifying exhaust gas exhausted from the internal combustion engine is carried, the catalyst carrier is heated by energization, and the catalyst carrier is accommodated in a cylindrical shape. And a cylindrical body attached to the exhaust pipe, a pair of electrodes provided on the outer peripheral surface of the catalyst carrier for energizing the catalyst carrier, and disposed between the cylindrical body and the catalyst carrier, the catalyst carrier is cylinderized by elasticity. A holding member to be held in the body, and a heat transfer member for transferring heat from the catalyst carrier to the cylindrical body.

  In this catalytic converter device, when the catalyst carrier is energized through the electrodes and heated to increase the temperature, the purification effect of the supported catalyst can be exhibited earlier. Further, the catalyst carrier is attached to the exhaust pipe via the holding member and the cylinder, and the holding member has elasticity, so that the relative positional fluctuation between the catalyst carrier and the cylinder is absorbed.

  The exhaust gas may contain carbon generated by combustion of the internal combustion engine. If this carbon adheres to the catalyst carrier or cylinder, current flows through the carbon, which reduces the efficiency of energization of the catalyst carrier. There is. In this invention, it has the heat-transfer member for making it heat-transfer from a catalyst support | carrier to a cylinder. Therefore, compared with a configuration without such a heat transfer member, the heat of the catalyst carrier (not limited to heat generated by energization from the electrodes, the heat acting on the catalyst carrier from the exhaust, or the reaction heat of the catalyst in the catalyst carrier). Can be efficiently transmitted to the cylinder, and the carbon adhering to the inner peripheral surface of the cylinder can be burned effectively. By burning and removing the carbon, it is possible to suppress a decrease in the efficiency of energization to the catalyst carrier.

  According to a second aspect of the present invention, in the first aspect of the present invention, the holding member is made of metal.

  By making the holding member made of metal, the thermal conductivity is higher than that made of, for example, resin, so that a configuration in which the holding member also serves as the heat transfer member can be realized.

  In invention of Claim 3, in the invention of Claim 2, the said holding member serves as the said heat-transfer member.

  Since the holding member also serves as the heat transfer member, the number of parts is reduced as compared with a configuration in which these are separated.

  According to a fourth aspect of the present invention, in the first or second aspect of the present invention, the cylindrical body has a large-diameter portion in which the holding member is disposed between the cylindrical body and the large-diameter portion. And a small diameter portion in which the heat transfer member is disposed between the catalyst carrier and the catalyst carrier.

  Thus, by providing the cylindrical body with the large diameter portion and the small diameter portion and arranging the holding member between the large diameter portion and the catalyst carrier, the thickness of the holding member can be ensured, so the elasticity of the holding member is increased. The catalyst carrier can be held in the cylinder by exerting it. In addition, by disposing the heat transfer member between the small diameter portion and the catalyst carrier, the thickness of the heat transfer member is reduced, and efficient heat transfer from the catalyst carrier to the cylinder is possible.

  According to a fifth aspect of the present invention, in the first aspect of the present invention, a part of the heat transfer member is exposed to the upstream side in the exhaust flow direction.

  Therefore, carbon easily adheres to the exposed portion of the heat transfer member, but the heat transfer member is also heated by the heat from the catalyst carrier, so that the attached carbon can be efficiently burned and removed.

  According to a sixth aspect of the invention, there is provided the insulating member according to any one of the first to fifth aspects, wherein the cylindrical body is electrically insulated from the catalyst carrier.

  Since the current from the catalyst carrier to the cylinder is suppressed by the insulating member, the current-carrying efficiency to the catalyst carrier is further increased. The insulating member may be provided in the heat transfer member, for example, or may be provided separately from, for example, between the catalyst carrier and the heat transfer member or between the heat transfer member and the cylinder. May be.

  Since the present invention has the above-described configuration, it is possible to suppress a decrease in the energization efficiency to the catalyst carrier due to the carbon contained in the exhaust gas.

1 is a cross-sectional view showing a catalytic converter device according to a first embodiment of the present invention in a cross section including a center line in an attached state to an exhaust pipe. It is sectional drawing which expands partially and shows the catalytic converter apparatus of 1st Embodiment of this invention in the attachment state to an exhaust pipe, (A) is the state which carbon adhered, (B) is carbon partially It shows the state of being removed by burning. It is sectional drawing which shows the catalytic converter apparatus of 2nd Embodiment of this invention in the cross section containing a centerline in the attachment state to an exhaust pipe. It is sectional drawing which shows the catalytic converter apparatus of 3rd Embodiment of this invention in the cross section containing a centerline in the attachment state to an exhaust pipe. It is sectional drawing which shows the catalytic converter apparatus of 4th Embodiment of this invention in the cross section containing a centerline in the attachment state to an exhaust pipe.

  FIG. 1 shows a catalytic converter device 12 according to a first embodiment of the present invention attached to an exhaust pipe 10.

  As shown in FIG. 1, the catalytic converter device 12 is made of a material having conductivity and rigidity (a conductive ceramic, a conductive resin, a metal, or the like can be applied, but in this embodiment, a conductive ceramic is used in particular). It has a catalyst carrier 14 formed. The catalyst carrier 14 is formed in a columnar shape or a cylindrical shape in which the surface area of the material is increased by configuring a thin plate having a honeycomb shape or a wavy shape into a spiral shape or a concentric shape, and a catalyst (platinum) is formed on the surface. , Palladium, rhodium, etc.) are attached. The catalyst has an action of purifying harmful substances in the exhaust gas flowing in the exhaust pipe 10 (the flow direction is indicated by an arrow F1). Note that the structure for increasing the surface area of the catalyst carrier 14 is not limited to the honeycomb shape or the wave shape described above.

  Two electrodes 16A and 16B are attached to the catalyst carrier 14 at positions symmetrical with respect to the catalyst carrier 14 (up and down in FIG. 1). In the present embodiment, the lengths of the electrodes 16A and 16B are made to coincide with the length of the catalyst carrier 14. The upstream end portions 16U of the electrodes 16A and 16B are in the same position as the upstream end surface 14A of the catalyst carrier 14 in the axial direction. Similarly, the downstream end portions 16L of the electrodes 16A and 16B are in the same position as the downstream end surface 14B of the catalyst carrier 14 in the axial direction.

  Terminals 18A and 18B are connected to the electrodes 16A and 16B via conductor members 20A and 20B made of a conductive material such as metal, respectively. Each of the terminals 18A and 18B has a structure in which an insulating layer 24 covers the periphery of the central electrode rod 22. The outer end of the electrode rod 22 (the end opposite to the conductor members 20A and 20B) is a connection 22C to which a power supply cable to the catalyst carrier 14 is connected.

  The insulating layer 24 is formed in a cylindrical shape from a material having electrical insulation. The insulating layer 24 covers the outer peripheral surface of the electrode rod 22 over the entire circumference, thereby preventing the flow of electricity from the electrode rod 22 to the cover portion 36 of the case cylinder 28.

  The conducting wire members 20A and 20B are formed in, for example, a zigzag shape or a spiral shape so as to have flexibility, and when the case cylinder 28 and the catalyst carrier 14 are relatively moved as described later, It is possible to absorb this relative movement. The catalyst carrier 14 can be heated by energizing the catalyst carrier 14 from the terminals 18A and 18B through the conductor members 20A and 20B and the electrodes 16A and 16B. By this heating, the temperature of the catalyst supported on the catalyst carrier 14 is raised, so that the purification action of the catalyst can be exhibited at an early stage even immediately after the engine is started.

  A holding member 26 formed in a substantially cylindrical shape by a metallic material (for example, a wire mesh) is disposed on the outer periphery of the catalyst carrier 14. Further, a case cylinder 28 formed in a substantially cylindrical shape with a metal such as stainless steel is disposed on the outer periphery of the holding member 26. In other words, the catalyst carrier 14 is accommodated inside the substantially cylindrical case cylinder 28, and the catalyst carrier 14 is cased by the holding member 26 disposed between the case cylinder 28 and the catalyst carrier 14. The cylinder 28 is held concentrically (center line CL).

  The holding member 26 also has a predetermined elasticity. Since the case cylinder 28 and the conductive ceramic catalyst carrier 14 have different linear expansion coefficients, the amount of expansion due to the heat of the exhaust gas passing through the exhaust pipe 10 and the current heating to the catalyst carrier 14 will be different. However, this difference in expansion amount is absorbed by the elasticity of the holding member 26. Further, even when vibration is input through the exhaust pipe 10, the holding member 26 absorbs a positional deviation between the case cylinder 28 and the catalyst carrier 14 while exhibiting a buffering action.

  Further, since the holding member 26 is made of a metal material, it has a higher thermal conductivity than other materials (such as ceramics and resins). For this reason, the heat of the catalyst carrier 14 can be efficiently transmitted to the case cylinder 28. In addition, in 1st Embodiment and 2nd Embodiment mentioned later, the holding member 26 is the structure which serves as the heat-transfer member which concerns on this invention.

  In the present embodiment, the holding member 26 is divided into two in the axial direction, and an upstream holding member 26P and a downstream holding member 26Q are configured. And between the upstream holding member 26P and the downstream holding member 26Q, the electrode accommodating part 30 which accommodates a part of conductor member 20A, 20B and terminal 18A, 18B is formed. The holding member 26, the conductor members 20A and 20B, and the terminals 18A and 18B are not in contact with each other.

  Further, as can be seen from FIG. 1, when the holding member 26 is viewed as a whole, the catalyst carrier 14 and the holding member 26 are formed to have substantially the same length in the axial direction, and the upstream end surface 14A of the catalyst carrier 14 and The upstream end surface 26A of the holding member 26 is substantially flush. Similarly, the downstream end surface 14B of the catalyst carrier 14 and the downstream end surface 26B of the holding member 26 are substantially flush with each other. And a part (upstream side end surface 26A) of the holding member 26 that is also a heat transfer member is exposed to the upstream side. Moreover, the other part (downstream end surface 26B) of the holding member is exposed to the downstream side.

  The holding member 26 may be formed in a substantially cylindrical shape continuous from the upstream end face 26A to the downstream end face 26B without being divided into two as described above. In this case, the electrode housing part 30 can be configured as a hole that penetrates the holding member 26 in the thickness direction at a position corresponding to each of the electrodes 16A and 16B.

  The case cylinder 28 is formed in a substantially cylindrical shape, and is continuous from the upstream taper portion 28A whose diameter is gradually increased toward the downstream on the upstream side in the flow direction, and from the upstream taper portion 28A in the middle portion in the flow direction. The intermediate portion 28B having a larger diameter than the exhaust pipe 10 and the downstream side tapered portion 28C which is continuous from the intermediate portion 28B and whose diameter is gradually reduced toward the downstream side are provided on the downstream side in the longitudinal direction.

  The downstream end of the front pipe 10A of the exhaust pipe 10 is at the upstream end of the upstream tapered section 28A, and the upstream end of the rear pipe 10B of the exhaust pipe 10 is at the downstream end of the downstream tapered section 28C. They are connected to each other, and the flow passage cross-sectional area of the exhaust gas is locally enlarged at the portion of the case cylinder 28 (particularly the intermediate portion 28B).

  The intermediate portion 28B is provided with a substantially cylindrical cover portion 36 that can accommodate the terminals 18A and 18B. In the state where the terminals 18 </ b> A and 18 </ b> B are inserted into the cover portion 36, the opening portion of the cover portion 36 is closed by the lid plate 38.

  The case cylinder 28 has a structure having an insulating property at least with respect to the catalyst carrier 14 and the holding member 26. Therefore, the current of the catalyst carrier 14 does not carelessly flow into the case cylinder 28 so that the current supply efficiency to the catalyst carrier 14 does not decrease. The insulating structure of the case cylinder 28 includes, for example, a structure in which the entire case cylinder 28 is made of an insulating material. In this configuration, the case cylinder 28 is also an insulating member according to the present invention.

  Further, the main body portion of the case cylinder 28 is made of metal, and an insulating film is provided on the inner peripheral surface thereof (for example, an insulating resin thin film is attached or applied), thereby insulating the catalyst carrier 14 and the holding member 26. It may be a structure that ensures the property. In this configuration, the insulating film on the inner peripheral surface constitutes the insulating member according to the present invention. As will be described later, from the viewpoint of promoting the combustion of carbon adhering to the inner peripheral surface of the case cylinder 28 using the heat applied from the catalyst carrier 14, the main body portion of the case cylinder 28 is made of metal, It is preferable to have a structure with high conductivity.

  Next, the operation of the catalytic converter device 12 of this embodiment will be described.

  As shown in FIG. 1, the catalytic converter device 12 is attached so that its case cylinder 28 is concentric with the exhaust pipe 10 in the middle of the exhaust pipe 10, and the exhaust passes through the inside of the catalyst carrier 14. At this time, harmful substances in the exhaust gas are purified by the catalyst supported on the catalyst carrier 14.

  In the catalytic converter device 12 of this embodiment, the catalyst carrier 14 is heated by energizing the catalyst carrier 14 by the terminals 18A and 18B, the conductor members 20A and 20B, and the electrodes 16A and 16B, thereby heating the catalyst carrier 14. The temperature can be raised, and the purification effect can be exerted higher. For example, when the temperature of the exhaust gas is low, such as immediately after starting the engine, the catalyst purification performance in the initial stage of engine starting can be ensured by conducting energization heating to the catalyst carrier 14 in advance. When the temperature of the exhaust is sufficiently high, the catalyst carrier 14 is heated by the heat from the exhaust, so there is no need to energize the catalyst carrier 14.

  The exhaust from the engine may contain carbon. As shown in FIG. 2B, the carbon CB adheres from the upstream end surface 14A (or the downstream end surface 14B) of the catalyst carrier 14 to the upstream end surface 26A of the holding member 26 and the inner peripheral surface of the case cylinder 28. If the inner circumferential surface of the case cylinder 28 is connected over the entire circumference (continues in an annular shape), the current that should flow through the catalyst carrier 14 also flows through the carbon CB, so that the current-carrying efficiency of the catalyst carrier 14 decreases. There is. Furthermore, there is a concern that the heating efficiency of the catalyst supported on the catalyst carrier 14 also decreases.

  Here, in the catalytic converter device 12 of the present embodiment, the holding member 26 is made of a metal material, and the thermal conductivity is higher than that made of a material other than metal. Therefore, the heat of the catalyst carrier 14 is efficiently transmitted to the case cylinder 28 via the holding member 26, and the temperature of the case cylinder 28 can be increased efficiently.

  Thereby, as shown in FIG. 2A, the carbon CB adhering to the inner peripheral surface of the case cylinder 28 can be removed by fuel. In FIG. 2 (A), for convenience of illustration, only the carbon CB adhering to the inner peripheral surface of the case cylinder 28 is removed by the fuel, but (the burned carbon is indicated by the symbol CB ′). In practice, the carbon CB adhering to the catalyst carrier 14, the electrodes 16A and 16B, and the holding member 26 is also fueled and removed according to these temperatures. In particular, since the temperature of the holding member 26 is also increased by the action of heat from the catalyst carrier 14, the carbon CB adhering to the upstream end face 26A can be effectively burned and removed. Then, by removing the carbon CB in this way, it is possible to suppress a decrease in the energization efficiency to the catalyst carrier 14.

  2A and 2B, only the vicinity of the upstream end surface 14A of the catalyst carrier 14 is shown, but the catalyst carrier 14 also passes through the catalyst carrier 14 in the vicinity of the downstream end surface 14B. Carbon may adhere. In the present embodiment, carbon adhering to the inner peripheral surface of the case cylinder 28 and the downstream end surface 26B of the holding member 26 is effectively burned and removed even in the vicinity of the downstream end surface 14B of the catalyst carrier 14. Is possible.

  Thus, in the catalytic converter device 12 of the present embodiment, the heat of the catalyst carrier 14 is efficiently transmitted to the case cylinder 28 by increasing the thermal conductivity by making the holding member 26 made of metal, so that the carbon CB is generated. Can be burned. Note that the heat of the catalyst carrier 14 in this case includes heat acting from the exhaust, reaction heat of the catalyst supported on the catalyst carrier 14, etc., in addition to heat generated by energization from the electrodes 16 </ b> A and 16 </ b> B.

  In the above embodiment, it is preferable that the holding member 26 has an insulating structure so that the current that should flow through the catalyst carrier 14 does not flow through the metal holding member 26. For example, an insulating coating may be applied to the wire mesh that constitutes the holding member 26 to prevent leakage from the catalyst carrier 14 to the holding member 26 while ensuring high thermal conductivity. In this configuration, the insulating coating constitutes the insulating member according to the present invention.

  Further, the holding member 26 may be divided into a plurality of pieces in the circumferential direction of the catalyst carrier 14, thereby suppressing current from flowing from one electrode 16 </ b> A to the other electrode 16 </ b> B via the holding member 26. Furthermore, the electrodes 16A and 16B may be shortened so as not to contact the holding member 26. In addition, the structure of the catalytic converter device 52 of the following second embodiment may be employed.

  FIG. 3 shows a catalytic converter device 52 according to a second embodiment of the present invention. The catalytic converter device 52 of the second embodiment has substantially the same configuration as the catalytic converter device 12 of the first embodiment, but an insulating member 54 is disposed between the electrodes 16A and 16B and the holding member 26. Is different from the catalytic converter device 12 of the first embodiment.

  Therefore, also in the catalytic converter device 52 of the second embodiment, the current that should flow through the catalyst carrier 14 does not flow through the metal holding member 26, and the energization efficiency to the catalyst carrier 14 becomes higher.

  In the catalytic converter device 52 of the second embodiment, the specific configuration of the insulating member 54 is not particularly limited. For example, a structure in which a thin-film insulating material is adhered to a predetermined position of the electrodes 16A and 16B or the holding member 26. Alternatively, a structure in which an insulating material that becomes a gel or paste under a specific condition is applied to a predetermined position of the electrodes 16A and 16B or the holding member 26 and cured can be exemplified. Furthermore, for example, a configuration in which a glass coating layer is thinned and coated, alumina, or the like is also applicable.

  FIG. 4 shows a catalytic converter device 62 according to a third embodiment of the present invention. In the catalytic converter device 62 of the third embodiment, the same components, members and the like as those of the catalytic converter device 12 of the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  In the catalytic converter device 62 of the third embodiment, a holding member 64 and a heat transfer member 66 are used instead of the holding member 26 of the first embodiment. Each of the two heat transfer members 66 is formed in a substantially cylindrical shape, and is located at a position flush with the upstream end surface 14A or the downstream end surface 14B of the catalyst carrier 14 and between the outer peripheral surface of the catalyst carrier 14 and the case cylinder 28. It arrange | positions so that an internal peripheral surface may be contacted. A part of the heat transfer member 66 (upstream end surface 66A) is exposed on the upstream side, and the other part (downstream end surface 66B) is exposed on the downstream side.

  The two holding members 64 are in contact with the outer peripheral surface of the catalyst carrier 14 and the inner peripheral surface of the case cylinder 28 at positions closer to the center in the axial direction than the heat transfer member 66 (positions close to the conductor members 20A and 20B). Are arranged to be.

  The holding member 64 is formed in a substantially cylindrical shape, but is made of an insulating material, unlike the holding member 26 of the first embodiment. The catalyst carrier 14 is held at a predetermined position inside the case cylinder 28. In addition, the difference in expansion amount between the case cylinder 28 and the catalyst carrier 14 and the positional deviation are absorbed by a predetermined elasticity.

  On the other hand, the heat transfer member 66 is made of a material having high thermal conductivity such as metal. For example, a wire mesh or the like can be applied as in the holding member 26 of the first embodiment. However, in the third embodiment, the holding member 64 is responsible for holding the catalyst carrier 14 at a predetermined position in the case cylinder 28. The heat transfer member of the third embodiment does not have to have an effect of holding the catalyst carrier 14 at a predetermined position in the case cylinder 28. Rather, the catalyst carrier 14 is held at a predetermined position by the elasticity of the holding member 64. The elasticity is set low (softened) so as not to inhibit the action. Thus, since the heat transfer member 66 according to the third embodiment does not need to exhibit elasticity and hold the catalyst carrier 14, it is possible to make a material or structure with higher thermal conductivity.

  As described above, in the catalytic converter device 62 of the third embodiment, an action of holding the catalyst carrier 14 at a predetermined position inside the case cylinder 28 and an action of efficiently transferring the heat of the catalyst carrier 14 to the case cylinder 28. Are held by the holding member 64 and the heat transfer member 66. Therefore, as the holding member 64, a member excellent in the action of holding the catalyst carrier 14 at a predetermined position inside the case cylinder 28 is used, and as the heat transfer member 66, the heat of the catalyst carrier 14 is transferred to the case cylinder 28. It is possible to use a material that has an excellent transmission effect.

  FIG. 5 shows a catalytic converter device 72 according to a fourth embodiment of the present invention. The catalytic converter device 72 of the fourth embodiment includes the holding member 64 and the heat transfer member 66 similar to those of the catalytic converter device 62 of the third embodiment, but the shape of the case cylinder 28 is the same as that of the third embodiment. Is different.

  That is, the case cylinder 28 according to the fourth embodiment includes a large-diameter portion 28L and a small-diameter portion 28S in the intermediate portion 28B. The large diameter portion 28L is provided at a position where the holding member 64 is provided, and the small diameter portion 28S is provided at a position where the heat transfer member 66 is provided.

  As can be seen by comparing FIG. 4 and FIG. 5, the large diameter portion 28 </ b> L has a larger diameter than the intermediate portion 28 </ b> B of the case cylinder 28 of the third embodiment. The small diameter portion 28S has a smaller diameter than the intermediate portion 28B.

  Therefore, in the catalytic converter device 72 of the fourth embodiment, the holding member 64 is thicker than the catalytic converter device 62 of the third embodiment. Thereby, the elasticity of the holding member 64 can be exhibited more effectively, and the catalyst carrier 14 can be reliably held inside the case cylinder 28.

  Moreover, in the catalytic converter device 72 of the fourth embodiment, the heat transfer member 66 is thinner than the catalytic converter device 62 of the third embodiment. As a result, the heat transfer from the catalyst carrier 14 to the case cylinder 28 can be improved, and the case cylinder 28 can be heated more effectively. And it is possible to further promote the combustion of the carbon CB adhering to the inner peripheral surface of the case cylinder 28.

  In the catalytic converter device 62 of the third embodiment and the catalytic converter device 72 of the fourth embodiment, insulation is provided between the electrodes 16A and 16B and the heat transfer member 66, as in the catalytic converter device 52 of the second embodiment. The member 54 may be disposed. Further, instead of (or in combination with) the insulating member 54, the heat transfer member 66 may have an insulating structure.

  The holding member of the present invention is not necessarily made of metal, and has a high thermal conductivity, such as a resin or ceramic (as an example of specific values of thermal conductivity, 0.5 W / (m · k) or more ), It is possible to effectively transfer the heat of the catalyst carrier 14 to the case cylinder 28 to burn carbon.

DESCRIPTION OF SYMBOLS 10 Exhaust pipe 12 Catalytic converter apparatus 14 Catalyst carrier 14A Upstream side end surface 14B Downstream side end surface 16A, 16B Electrode 18A, 18B Terminal 20A, 20B Conductive member 26 Holding member (heat transfer member)
28 Case cylinder 28L Large diameter portion 28S Small diameter portion 52 Catalytic converter device 54 Insulating member 62 Catalytic converter device 64 Holding member 66 Heat transfer member 72 Catalytic converter device CB Carbon

Claims (6)

A catalyst carrier that carries a catalyst for purifying exhaust gas discharged from the internal combustion engine and is heated by energization;
A cylindrical body that is formed in a cylindrical shape and contains the catalyst carrier therein and is attached to the exhaust pipe;
A pair of electrodes provided on the outer peripheral surface of the catalyst carrier for energizing the catalyst carrier;
A holding member that is disposed between the cylinder and the catalyst carrier and holds the catalyst carrier in the cylinder by elasticity;
A heat transfer member for transferring heat from the catalyst carrier to the cylinder;
A catalytic converter device.   The catalytic converter device according to claim 1, wherein the holding member is made of metal.   The catalytic converter device according to claim 2, wherein the holding member also serves as the heat transfer member. The cylinder is
A large-diameter portion in which the holding member is disposed between the catalyst carrier,
A small-diameter portion having a smaller diameter than the large-diameter portion and the heat transfer member disposed between the catalyst carrier and
The catalytic converter device according to claim 1 or 2, comprising:   The catalytic converter device according to any one of claims 1 to 4, wherein a part of the heat transfer member is exposed upstream in a flow direction of the exhaust gas. An insulating member for electrically insulating the cylindrical body from the catalyst carrier;
The catalytic converter device according to claim 1, comprising:

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