JPH074230A - Electrically heated catalyst device - Google Patents

Abstract

PURPOSE:To provide an electrically heated catalyst device enabling the improvement of an exhaust purification factor. CONSTITUTION:A catalyst 2 is disposed in a case 1 to be an exhaust passage, and heated parts (non-jointed areas 11) are formed at part of the catalyst 2 and heated by current application. A stream fairing catalyst 12 is disposed upstream of the catalyst 2 in the case 1. Inward louvers 14a are formed at the outer peripheral area 15 of the stream fairing catalyst 12, and outward louvers 14b are formed at the center area 16. The exhaust gas drifts toward the heated parts (non-jointed areas 11) by the louvers 14a, 14b of the stream fairing catalyst 12, and the flow of exhaust gas is concentrated onto the heated parts.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrically heated catalyst device.

[0002]

2. Description of the Related Art The present applicant has already filed Japanese Patent Application No. 3-338556.
Proposed an electrically heated catalyst device. That is, a metallic corrugated plate and a flat plate on both sides of which an insulating coating is formed are stacked and rolled up, and a cylindrical electrode is connected to the center of a metallic catalyst carrier that forms alternating layers of the corrugated plate and the flat plate. The outer cylinder is connected to. In addition, in a plurality of layers from the center of the metallic catalyst carrier and in a plurality of layers from the outermost periphery, corrugated plates and flat plates are joined and electricity is applied to the metallic catalyst carrier having a reduced electric resistance value.
Partial heating is performed.

[0003]

In order to improve the exhaust gas purification rate of the partially heated catalyst, it is known that exhaust gas should be concentratedly flown to the heated portion. However, the degree of concentration of exhaust gas is determined by the shape of the cone on the catalyst inlet side and the like, and varies from vehicle to vehicle, and the degree of concentration is not large, and there is a limit to the improvement of the purification rate.

Therefore, an object of the present invention is to provide an electrically heated catalyst device which can improve the exhaust gas purification rate.

[0005]

According to a first aspect of the present invention, a catalyst is arranged in an exhaust passage, and a part of the catalyst has a heating portion which is heated by electric conduction. Upstream of the catalyst in
The gist of the present invention is an electrically heated catalyst device in which an exhaust gas biasing member that biases the exhaust gas toward the heating portion is arranged.

According to a second aspect of the present invention, the exhaust gas biasing member according to the first aspect is used to bias the exhaust gas. According to a third aspect of the present invention, in the electrically heated catalytic device, the catalyst is disposed in the exhaust passage, and a part of the catalyst has a heating portion that is heated by electricity.
The gist of the present invention is an electrically heated catalyst device in which the heating portion is arranged in a central flow velocity portion where the flow of exhaust gas in the exhaust passage is maximized.

[0007]

According to the first aspect of the present invention, the exhaust gas biasing member on the upstream side of the catalyst causes the exhaust gas to drift toward the heating portion, so that the flow of the exhaust gas concentrates on the heating portion. As a result, the exhaust gas passes through the catalyst portion having a high temperature, so that the purification performance is improved.

In the second aspect, the exhaust gas is diverted by the louver as the first exhaust gas diverging member.
In the third aspect, the gas flow having the maximum exhaust gas flow hits the heating portion.

[0009]

【Example】

(First Embodiment) A first embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a cross-sectional view of an electrically heating type catalyst device, and FIG. 2 shows a view taken in the direction of arrow A in FIG. In FIG. 2, a partially heated catalyst 2 is arranged in a cylindrical case 1 that forms an exhaust passage. As shown in FIG. 3, this partially heated catalyst 2 has a thin corrugated plate 4 and a flat plate 5 made of metal welded to the positive electrode 3 and overlapped with each other to form spiral alternating layers. The metal catalyst carrier 6 is formed.
The corrugated plate 4 and the flat plate 5 are, for example, 20% Cr-5% Al-.
It is a foil material having a composition of 75% Fe and a plate thickness of about 50 μm. Further, on the surfaces of the corrugated plate 4 and the flat plate 5 in the non-bonding region, an alumina layer which is an electrically insulating film is formed beforehand by an oxidation treatment.

As shown in FIGS. 1 and 2, a positive electrode 3 is arranged in the center of the catalyst carrier 6 along the axial direction thereof, and the positive electrode 3 is electrically connected to the catalyst carrier 6. The catalyst carrier 6 is inserted into the metal cylindrical case 1 and fixed to the case 1 by brazing, for example, and the catalyst carrier 6 can be electrically connected to the case 1. As shown in FIG. 2, the negative electrode 7 is connected to the side surface of the case 1.

As shown in FIG. 1, the positive electrode 3 extends in the axial direction of the case 1 and is then bent into an L shape to extend in the diametrical direction of the case 1 and penetrates the side surface of the case 1. Positive electrode 3
Are electrically insulated from the case 1 by the insulating material 8.

Referring to FIG. 2, in the cylindrical region 9 (hatched region in the drawing) at the center of the catalyst carrier 6 and the cylindrical region 10 (hatched region in the drawing) at the outer periphery, the peaks and valleys of the corrugated plate 4 are formed. The flat plate 5 and the flat plate 5 are electrically connected to each other by brazing, discharge welding, laser welding, or the like. The central joining region (cylindrical region 9) and the outer joining region (cylindrical region 1)
In a region 11 between the corrugated plate 4 and the flat plate 5, the corrugated plate 4 and the flat plate 5 are not bonded to each other, and thus the insulating film Al ₂
Insulated by O ₃ .

Further, as shown in FIG. 1, the partially heated catalyst 2
On the upstream side of the rectifying catalyst 12 as an exhaust gas drift member.
Is installed. The rectifying catalyst 12 is made of SUS430 series ferrite foil. The rectifying catalyst 12 is formed by spirally winding a plate-shaped catalyst.

As shown in FIG. 4, a flat plate 13 is formed in the central portion of the rectifying catalyst 12 in the axial flow direction.
The louver 14 is provided in the. The louver 14 is pressed into a flat plate so as to project to one surface, and is formed in a bowl shape having an opening in the latter half (downstream). Then, as shown in FIG. 1, the outer peripheral region 15 of the rectifying catalyst 12
An inward louver 14a is attached to the central area 16, and an outward louver 14b is attached to the central area 16.

Further, as shown in FIG. 4, this rectifying catalyst 12
Corrugated plates 17 are formed on the upstream and downstream sides of the flat plate 13 in FIG. 1 to 3 are arranged in an exhaust passage of an internal combustion engine, and a main catalyst device is arranged in an exhaust passage downstream of the electric heating catalyst device.

The catalyst cannot exhibit the exhaust gas purification action unless it becomes higher than the activation temperature. Therefore, while the engine is cold, the electrically heated catalyst device is energized and heated to raise the temperature of the catalyst above the activation temperature in a short time to purify harmful components in the exhaust gas.

Next, the operation of the electrically heated catalytic device thus constructed will be described. Positive electrode 3 of partially heated catalyst 2
When a voltage is applied between the negative electrode 7 and the negative electrode 7, the central junction region 9
Also, in the outer peripheral joint region 10, since the corrugated plate 4 and the flat plate 5 are electrically connected to each other, the electric resistance value is low and almost no heat is generated.

On the other hand, in the non-bonding region 11, the corrugated plate 4 and the flat plate 5 are insulated from each other, so that the electric resistance value becomes large. Therefore, the non-bonding region 11 generates heat by energization and becomes a heat generating portion (heating portion).

In FIG. 1, when the exhaust gas flows into the rectifying catalyst 12, the flow α near the center flows outward by the outward louver 14b, and the flow β near the outer periphery flows inward louver 14b.
Flows inward by a.

As a result, as shown in FIG. 5, the flow velocity distribution has a velocity distribution that is faster toward the center on the upstream side of the rectifying catalyst 12, whereas it is later on the downstream side and closer to the outer periphery of the rectifying catalyst 12. The velocity distribution becomes the maximum velocity at the location. Therefore, the airflow is concentrated on the heat generating portion (non-bonding region 11) of the partially heated catalyst 2. As a result, most of the exhaust gas passes through the activation area of the catalyst, and the harmful components in the exhaust gas can be efficiently purified.

That is, the exhaust gas purification rate can be greatly improved by providing the rectifying catalyst 12 having the function of concentrating the flow in the heat generating portion (non-bonding area 11) of the partially heated catalyst 2 in advance.

As described above, in this embodiment, the catalyst 2 is disposed in the exhaust passage, and a part of the catalyst 2 has a heating portion (non-bonding area 11) that is heated by energization. In the above, the rectifying catalyst 12 (exhaust gas non-uniform flow member) that causes the exhaust gas to flow non-uniformly toward the heating portion (non-bonding region 11) is arranged upstream of the catalyst 2 in the exhaust passage. Therefore, the rectifying catalyst 12 on the upstream side of the catalyst 2 causes the exhaust gas to flow unevenly toward the heating portion (non-bonding region 11), so that the flow of the exhaust gas concentrates on the heating portion. As a result, the exhaust gas passes through the catalyst portion having a high temperature, so that the purification performance is improved.

As an application example of the first embodiment, for example, the wound type partially heated catalyst has been described in the above embodiment, but may be embodied as a laminated partially heated catalyst. Further, as shown in FIG. 6, an inward louver 19 is provided in the central region 16 of the axial flow and an outward louver 2 is provided in the outer peripheral region 15 of the axial flow.
The 0s may be arranged so that their openings face upstream. (Second Embodiment) Next, the second embodiment will be described focusing on the differences from the first embodiment.

FIG. 7 is a sectional view of an electrically heating type catalyst device in the second embodiment, and FIG. 8 is a sectional view taken along line BB of FIG. In the present embodiment, a simple 90 ° elbow 21 is used as the structure for diverting the exhaust gas, and the heating portion 23 of the catalyst is provided only on one side where the exhaust gas flow is concentrated. The configuration is shown below.

As shown in FIG. 7, a 90 ° elbow 21 as an exhaust gas drift member is installed upstream of the catalyst 22. Further, as shown in FIGS. 7 and 8, the heating portion 23 in the catalyst 22 is located between the central joining region 24 (hatched portion in the figure) and the outer circumferential joining region 25 (hatched portion in the figure) in FIG. Is provided only on a part of the upstream end face in the region. The heating portion 23 is formed by joining the central joining region 24 and the outer circumferential joining region 25 so that they can be energized by discharge welding or laser welding.
That is, when a voltage is applied between the positive electrode 3 and the case 1,
Since the intermediate region 26 other than the heating portion 23 is insulated by the insulating coating, almost no current flows, and the heating portion 23
Since the electric current concentrates on, the heating portion 23 alone can be heated. And this heating part 23 is the elbow 2.
It is provided in the portion where the flow is concentrated by 1 (the lower portion in FIG. 7).

In FIG. 7, the exhaust gas flowing through the exhaust pipe 27 is bent by the elbow 21, but due to its inertia, the flow is concentrated in the lower part in FIG. 7 (the flow of the exhaust gas is indicated by an arrow). Since the heating portion 23 of the catalyst 22 is provided in the portion where the flow is concentrated, most of the exhaust gas passes through the heating portion 23 and reaches the activation temperature of the catalyst even in the partial heating, so that the exhaust gas is harmful. The components can be efficiently purified. Moreover, since it is partial heating, power consumption can be suppressed to a small level. If the heating portion 23 of the catalyst 22 is provided only on the upstream side, the reaction heat of the catalyst and the flow of exhaust gas can immediately warm up to the downstream side. (Third Embodiment) Next, the third embodiment will be described focusing on the differences from the first embodiment.

FIG. 9 shows a sectional view of an electrically heating type catalyst device in the third embodiment, and FIG. 10 shows a sectional view taken along line CC of FIG. In the present embodiment, as a structure that causes the exhaust gas to flow in a non-uniform manner, the splitting / merging of pipes is used, and the catalyst 29
The center electrode of the is provided in the drift portion, and the heating portion 30 is provided around it.
Is provided. The structure is shown below.

As shown in FIG. 9, the exhaust pipe 28 is connected with a divert / merge pipe 63 as an exhaust gas biasing member, and the case 1 of the catalyst 29 is connected to the divert / merge pipe 63. That is, the branching / merging pipe 63 is branched at the portion a in FIG. 9 and then merges at the portion b to reach the catalyst 29. Since the shape of the flow dividing / merging pipe 63 is rhombic as shown in FIG. 9, the exhaust gas is concentrated on the lower portion of the catalyst 29 in the drawing. Further, as shown in FIGS. 9 and 10, the positive electrode 3 of the catalyst 29 is provided below the center of the figure. The corrugated plate and the flat plate are spirally wound from the positive electrode 3, but the height of the corrugated plate is higher toward the upper part of the figure and lower toward the lower part of the figure. The electrode 3 is located below the center as shown in the figure.

The heating portion 30 is provided on the upstream end face of the doughnut-shaped portion centering on the positive electrode 3.
In this heating portion 30, the upstream end face portion of the insulated area between the central joining area 31 (hatched area in the figure) and the outer circumferential joining area 32 (hatched area in the figure) is energized by laser welding or the like. Is formed by That is, when a voltage is applied between the positive electrode 3 and the negative electrode 7, the central joint region 31 and the outer peripheral joint region 32 have low electric resistance values and hardly generate heat. Then, the electric current intensively passes through the laser welded portion provided on the end face of the catalyst, so that the laser welded portion generates heat. Since the laser welding is widely distributed in the heating portion 30, the heating portion 30 generates heat almost uniformly.

Also in this embodiment, since the heating portion 30 is provided only in the portion where the flow is concentrated due to the diverging and merging of the exhaust pipe 28, the improvement of the purification performance and the reduction of the electric power can be achieved at the same time. (Fourth Embodiment) Next, the fourth embodiment will be described focusing on the differences from the first embodiment.

FIG. 11 shows a sectional view of an electrically heated catalyst device in the fourth embodiment, and FIG. 12 shows a sectional view taken along the line DD of FIG. In this embodiment, the positive electrode 33 is projected to the upstream side from the end face of the catalyst to generate a drift. The configuration is shown below.

As shown in FIG. 11, an L-shaped positive electrode 33
Is inserted from the exhaust gas flow downstream side of the catalyst 34, and the catalyst 3
4 protrudes from the upstream end surface of No. 4 by about 20 mm. or,
In the catalyst 34, the heating portion 35 is provided only on the upstream end face in the region between the central joining region 36 (hatched region in the drawing) and the outer circumferential joining region 37 (hatched region in the drawing) in FIG. The method of forming the heating portion 35 is the same as in the third embodiment. An exhaust pipe 38 is attached to the case 1 of the catalyst 34 via a tapered expansion pipe 39.

In FIG. 11, among the exhaust gases flowing through the exhaust pipe 38, especially the exhaust gas flowing through the central portion is the catalyst 3
The flow is changed by the positive electrode 33 protruding from the upstream end surface of No. 4, and flows intensively through the heating portion 35 of the catalyst 34.
Therefore, the exhaust gas passes through the catalyst portion having a high temperature, so that the purification performance is improved.

In this embodiment, the catalyst 3 in the positive electrode 33 is used.
The protruding portion 33a from the end face of No. 4 serves as an exhaust gas drift member. (Fifth Embodiment) Next, the fifth embodiment will be described focusing on the differences from the first embodiment.

FIG. 13 is a sectional view of an electrically heating type catalyst device in the fifth embodiment, and FIG. 14 is a sectional view taken along line EE of FIG. In this embodiment, the uneven flow generated by the elbow 46 of the exhaust pipe existing on the upstream side of the catalyst is rectified by the positive electrode 40 protruding on the upstream side from the end face of the catalyst, and is effectively exhausted to the heating portion 42 provided in a donut shape. It is a gas flow. The configuration is shown below.

As shown in FIG. 13, the positive electrode 40 is the catalyst 4
No. 1 is inserted from the downstream side of the exhaust gas flow, and protrudes about 20 mm from the upstream end surface of the catalyst 41. Then, the protruding portion of the positive electrode 40 is about 30 toward the lower part in the figure.
° Bent. In the catalyst 41, the heating portion 42 is provided only on the upstream end face in the region between the central joining region 43 (hatched region in the drawing) and the outer circumferential joining region 44 (hatched region in the drawing) in FIG. 14. . The method of forming the heating portion 42 is the same as in the third embodiment. Also, the exhaust pipe 45 is 90
° Catalyst 41 through elbow 46 and tapered expansion tube 47
It is attached to the case 1.

In FIG. 13, the exhaust gas flowing through the exhaust pipe 45 is bent by the elbow 46, and a non-uniform flow occurs, and most of the flow concentrates in the lower part of the figure.
1, the positive electrode 40 protruding from the upstream end surface and bent downward in the figure rectifies the flow in the upward direction in the figure, and the exhaust gas efficiently uses the heating portion 42 of the catalyst 41 provided in a donut shape. Flow.

That is, even if the elbow 46 or the like immediately before the catalyst 41 causes a nonuniform flow, it is rectified by the effect of the protruding electrode 40, and the donut-shaped heating portion 42 can be made to flow intensively.

In this embodiment, the catalyst 4 in the positive electrode 40 is used.
40a from the end face of 1 and the 90 ° elbow 46
Is an exhaust gas drift member. (Sixth Embodiment) Next, a sixth embodiment will be described focusing on the differences from the first embodiment.

FIG. 15 shows an electric heating type catalyst device in the sixth embodiment. A baffle plate 49 as an exhaust gas biasing member is arranged on the upstream side of the heater catalyst carrier 48. The baffle plate 49 is attached so as to be rotatable around a fulcrum 50. The baffle plate 49 is vertical to the exhaust gas flow Y as shown in FIG. 15 when the heater catalyst carrier 48 is heated, and is horizontal to the exhaust gas flow as shown in FIG. 16 when it is not heated.

FIG. 17 shows the shape of the baffle plate 49. Further, as shown in FIG. 18, the heating portion 51 is on the outer peripheral portion, the outer diameter R1 of the baffle plate 49 is smaller than the exhaust pipe diameter, and the outer diameter R2 (heating portion) of the non-heating portion 52 of FIG. 52
(Inside diameter) is almost the same size.

Under the condition that the catalyst with heater is heated, such as immediately after starting the engine, the baffle plate 49 is made vertical to the flow of exhaust gas as shown in FIG. As a result, the exhaust gas passes through the gap 54 between the baffle plate 49 and the exhaust pipe 53 as shown by the arrow Y in FIG.
It is possible to purify most of the exhaust gas after passing through. When it is not necessary to energize the heater-equipped catalyst carrier 48, the baffle plate 49 is made horizontal with respect to the exhaust flow as shown in FIG. 16 to prevent an increase in pressure loss. With such a configuration, the exhaust flow can be concentrated, and the heating portion of the catalyst with a heater can be made small, so that power saving can be achieved.

As an application example of this embodiment, as shown in FIG. 20, in the case where the heating section 51 is located at the center, as shown in FIG.
As shown in, a through hole 55 is provided in a portion of the baffle plate 49 facing the heating portion 51, and the outer diameter of the baffle plate 49 is substantially equal to the exhaust pipe diameter. (Seventh Embodiment) Next, the seventh embodiment will be described focusing on the differences from the first embodiment.

21 and 22 show an electrically heated catalyst device according to the seventh embodiment. In the present embodiment, an openable and closable valve 56 as shown in FIG. 21 is attached as an exhaust gas distribution member on the upstream side of the catalyst with heater. When the heater is energized, the valve 56 is closed and the passage hole 57 is narrowed to concentrate the flow, as shown in FIG. Further, when the power is not supplied, the valve 56 is opened and the passage pipe 57 is expanded to smooth the exhaust flow as shown in FIG.

As shown in FIG. 23, when the heater is energized,
When the valve 56 is closed, the flow Z of exhaust gas concentrates and hits the central heating portion 64 of the heater-equipped catalyst 58. By heating only the central portion of the heater-equipped catalyst 58, it is possible to reduce the power consumption without lowering the purification performance. or,
When the heater is not energized, the valve 56 is opened as shown in FIG. 24 to allow the exhaust gas to flow uniformly.

In FIG. 23, the valve 5 is used in this embodiment.
6 is a valve that can be opened and closed. However, the present invention is not limited to this, and may be a temperature-sensitive shape memory alloy that concentrates exhaust gas by constricting it when the exhaust gas is at a low temperature and does not constrict it when the exhaust gas is at a high temperature. (Eighth Embodiment) Next, an eighth embodiment will be described with a focus on differences from the first embodiment.

FIG. 25 shows a sectional view of an electrically heating type catalyst device in the eighth embodiment, and FIG. 26 shows a sectional view taken along the line FF of FIG. In each of the above-described embodiments, the exhaust gas drift member is provided. However, in the present embodiment, the positive electrode 3 is not provided at a location where the exhaust gas flow in the catalyst is large without providing the exhaust gas drift member. The heat mass is reduced to achieve faster heating and lower power consumption. The configuration is shown below.

The exhaust pipe 59 is straight, and is attached to the case 1 of the catalyst 61 via a tapered enlarged portion 60. Therefore, the exhaust gas flow is mostly concentrated in the central portion of the catalyst 61. The positive electrode 3 is provided near the lower part in the figure, excluding the central part where the flow of the catalyst 61 is concentrated. This is realized by changing the height of the corrugated plate as in the third embodiment. The heating unit 62 is provided in the central portion where the flow is concentrated. The forming method is the same as in the second embodiment.

The heat generating portion is arranged at the location where the flow is concentrated as in the previous embodiments, but the heat mass is reduced by not providing the positive electrode 3 at the location where the flow is concentrated. It is possible to achieve faster heating and lower power consumption.

As described above, in this embodiment, the heating portion 62 is provided in the central flow velocity portion where the flow of exhaust gas in the exhaust passage is maximum.
Are arranged.

[0052]

As described above in detail, according to the present invention,
It has an excellent effect of improving the exhaust gas purification rate.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an electrically heated catalyst device according to a first embodiment.

FIG. 2 is a view on arrow A in FIG.

FIG. 3 is an exploded view of a partially heated catalyst.

FIG. 4 is an explanatory diagram for explaining a rectifying catalyst.

FIG. 5 is a distribution diagram showing a distribution of flow velocity.

FIG. 6 is a cross-sectional view of an electrically heated catalyst device of an application example of the first embodiment.

FIG. 7 is a cross-sectional view of an electrically heated catalyst device according to a second embodiment.

8 is a cross-sectional view taken along line BB of FIG.

FIG. 9 is a sectional view of an electric heating type catalyst device of a third embodiment.

10 is a cross-sectional view taken along line CC of FIG.

FIG. 11 is a cross-sectional view of an electrically heated catalyst device according to a fourth embodiment.

12 is a cross-sectional view taken along the line DD of FIG.

FIG. 13 is a cross-sectional view of an electrically heated catalyst device according to a fifth embodiment.

14 is a sectional view taken along line EE in FIG.

FIG. 15 is a sectional view of an electrically heating type catalyst device of a sixth embodiment.

FIG. 16 is a cross-sectional view of an electrically heated catalyst device according to a sixth embodiment.

FIG. 17 is a perspective view of a baffle plate according to a sixth embodiment.

FIG. 18 is a front view of a heated portion of the catalyst of the sixth embodiment.

FIG. 19 is a perspective view of a baffle plate of an application example of the sixth embodiment.

FIG. 20 is a front view of a heated portion of a catalyst according to an application example of the sixth embodiment.

FIG. 21 is a front view of a valve of an electrically heated catalyst device according to a seventh embodiment.

FIG. 22 is a front view of the valve of the electrically heated catalyst device of the seventh embodiment.

FIG. 23 is a sectional view of an electric heating type catalyst device of a seventh embodiment.

FIG. 24 is a sectional view of an electric heating type catalyst device of a seventh embodiment.

FIG. 25 is a sectional view of an electrically heating type catalyst device of an eighth embodiment.

26 is a cross-sectional view taken along the line FF of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Case 2 Catalyst 12 Rectifying catalyst as an exhaust gas deflecting member 21 90 ° elbow as an exhaust gas deflecting member 33a Positive electrode protrusion 40a as an exhaust gas deflecting member 40a Positive electrode protrusion as an exhaust gas deflecting member 46 Exhaust gas 90 ° elbow as a drift member 49 Baffle plate as an exhaust gas drift member 56 Valve as an exhaust gas drift member 63 Dividing / merging pipe as an exhaust gas drift member

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical indication location B01J 35/04 321 A 8017-4G F01N 3/24 ZAB N (72) Inventor Yoshinaga Nishi Nishio, Aichi prefecture 14 Iwatani, Shimohakaku-cho, Ichi, Japan Research Institute for Automotive Parts, Inc. (72) Inventor Yukihiro Shinohara 14 Iwatani, Shimohakaku-cho, Nishio-shi, Aichi Ltd., Japan Automotive Parts Research Institute (72) Inventor Osamu Fujishiro Nishio, Aichi 14 Iwatani, Shimohakaku-cho, Japan Within the Japan Auto Parts Research Institute, Inc. (72) Inventor Akihiro Izawa 14 Iwatani, Shimohakaku-cho, Nishio-shi, Aichi Japan Auto Parts Research Institute (72) Inventor Masahiko Koporu Toyota, Aichi Prefecture Toyota-cho, Toyota-shi, Japan (72) Inventor Hiroshi Hirayama 1 Toyota-cho, Toyota-shi, Aichi Earth Toyota Motor Co., Ltd. in the (72) inventor Masahiko Hibino Toyota City, Aichi Prefecture, Toyota-cho, Toyota first address Toyota Motor Co., Ltd. in

Claims (3)

[Claims] 1. A catalyst is disposed in the exhaust passage, and
In an electrically heated catalyst device having a heating portion that is heated by energization in a part of the catalyst, an exhaust gas drift member that biases the exhaust gas toward the heating portion is provided upstream of the catalyst in the exhaust passage. An electrically heated catalyst device characterized by being arranged. 2. The electric heating type catalyst device according to claim 1, wherein the exhaust gas biasing member biases the exhaust gas by a louver. 3. A catalyst is arranged in the exhaust passage, and
In an electrically heated catalyst device having a heating portion heated by energization in a part of the catalyst, the heating portion is arranged at a central flow velocity portion where the flow of exhaust gas in the exhaust passage is maximum. Electric heating type catalyst device.