JPH0642335A - Exhaust particulate remover for internal combustion engine - Google Patents

Abstract

PURPOSE:To perform regeneration improved of a filter without being influenced by running air, in an exhaust particulate remover for processing the filter regenerated during running. CONSTITUTION:In an exhaust particulate remover for processing a filter regenerated during running by supplying secondary air at the time of regenerating the filter to discharge combustion gas to the outside, the remover is constituted by providing a nozzle 15 for limiting an inflow of running air in the vicinity of an opening part of a combustion gas discharge pipe 86. The remover is also constituted such that the nozzle 15 for limiting an inflow of running air at vehicle running time is provided in the vicinity of the opening part of the combustion gas discharge pipe 86 and also it is arranged so as to come into contact with the periphery of filter cases 2A, 2B before or after combustion gas of the discharge pipe 86 is discharged to the outside. As a result, running air can be prevented from flowing into the combustion gas discharge pipe 87, and also suppressing cooling a filter peripheral part, to improve reliability of a regenerating process.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust particulate removing apparatus for an internal combustion engine, and more particularly to an exhaust particulate removing apparatus for collecting and removing particulates which are exhaust particulates contained in the exhaust gas of a diesel engine.

[0002]

2. Description of the Related Art Exhaust gas of an internal combustion engine of an automobile or the like, especially a diesel engine, contains exhaust particulates (particulates) containing carbon as a main component, which is a cause of exhaust black smoke. From the viewpoint of environmental pollution, it is desirable to remove this particulate, and in recent years, it has been proposed to dispose an exhaust particulate remover in the exhaust passage of a diesel engine and remove diesel particulate with this exhaust particulate remover. There is.

Such an exhaust particle removing device for a diesel engine generally has a structure in which a particulate filter having honeycomb-shaped partition walls made of a porous material such as ceramic is supported in its case. When the gas passes through this filter, the particulates in the exhaust gas are collected on the wall surface of the filter, and only the exhaust gas from which the particulates have been removed is discharged into the atmosphere.

In the exhaust particulate removing device constructed as described above, when the amount of the particulates trapped inside the particulate filter increases with the use of the particulate filter, the air permeability is gradually lost due to the trapped particulates. Therefore, the engine performance will decrease. For this reason, in the exhaust particulate removing device, the particulates trapped in the particulate filter are periodically burned and removed to regenerate the filter. A burner may be used to ignite the particulates in such a regeneration process, but it is common to ignite by energizing an electric heater provided at the end of the particulate filter. Then, during the regeneration process, a regeneration gas, for example, secondary air is supplied to the particulate filter to continue the combustion of the particulates.

In Japanese Patent Laid-Open No. 58-180715, at the time of regeneration of the particulate filter, the upstream and downstream of the particulate filter are closed, secondary air is supplied from the exhaust downstream side, and combustion gas is supplied from the exhaust upstream side. The evacuation configuration is shown. FIG. 8 shows the structure of an exhaust particulate removal device 80 in which a particulate filter is arranged in parallel in the exhaust passage. Here, the regeneration treatment shown in Japanese Patent Laid-Open No. 58-180715 is performed by the exhaust particulate removal. Device 80
The case of applying to is explained. In the figure, 88 is an exhaust pipe connected to the engine. This exhaust pipe 88 is branched into two parts on the upstream side of the muffler 83, and the branched exhaust pipe 8
A particulate filter 8 is provided on each of 8a and 88b.
1, 82 are provided. Then, the filters 81 and 8
Ignition heaters H1 and H2 are provided at the ends of 2 respectively, and exhaust pipes 88a and 8 on the downstream side of the filters 81 and 82 are provided.
8b is a secondary air supply pipe 85 from the electric air pump 84.
Connected to the exhaust pipe 88 on the downstream side of the filters 81, 82.
A combustion gas exhaust pipe 86 is provided at a and 88b.
In addition, control valves V1 and V are provided at the branches of the exhaust pipe 88, respectively.
2 is provided, and an opening / closing valve V is provided in the middle of the secondary air supply pipe 85.
3, V4, V5 are provided, and on-off valves V6, V7, V8 are provided in the middle of the combustion gas discharge pipe 86. Normally, the control valves V1 and V2 are in the neutral position, and the open / close valves V3 to V8
Are all closed. And both filters 81, 8
At 2, the particulates in the exhaust gas are collected. 89
Is a differential pressure sensor that detects the pressure difference between the upstream side and the downstream side of the filters 81 and 82.

In the exhaust particulate removal device 80 constructed as described above, the regeneration timing of the filters 81 and 82 is determined by the differential pressure detection value of the differential pressure sensor 89. Then, during the regeneration process, for example, the filter 81 is first subjected to the regeneration process, and then the filter 82 is subjected to the regeneration process, and while one filter is being regenerated, the exhaust gas flows through the other filter and is discharged to the atmosphere. Here, only the reproduction process of the filter 81 will be described.

When the filters 81 and 82 come to the regeneration time and the filter 81 is regenerated, the control valves VI and V2 close the exhaust pipe 88a having the filter 81 and open / close the valve V.
3, V4, V7, V6, V8 opens. Then, the heater H1 is energized for about 5 minutes, the air pump 84 is driven, and the secondary air enters the exhaust pipe 88a from the secondary air supply pipe 85 as shown by the broken line, and the particulates in the filter 81 are removed. Help burning. The particulate combustion gas is discharged into the atmosphere from the combustion gas discharge end 87 through the combustion gas discharge pipe 86.

[0008]

However, Japanese Patent Laid-Open No. 58-58
-180715, the exhaust particulate removing device, and the exhaust particulate removing device 8 described with reference to FIG.
0, if the filter regeneration process is performed while the vehicle is traveling,
There is a risk that running wind will flow in from the front end opening portion 87 of the combustion gas discharge pipe 86, and as a result it will not be possible to send the prescribed secondary air to the filter that is being regenerated, and good regeneration of the filter will be hindered. . Also, when the running wind of the vehicle hits the filter being regenerated, the outer periphery of the filter is cooled,
There is a risk that the temperature difference between the inside and the inside of the high temperature becomes large and cracks occur in the filter and the filter is damaged.

Therefore, a first object of the present invention is to solve the problems of the conventional exhaust particle removing apparatus for an internal combustion engine, and in the exhaust particle removing apparatus for executing the filter regeneration process during traveling, the traveling wind is It is an object of the present invention to provide an exhaust particulate removal device that can always supply suitable secondary air to a filter that is being regenerated without flowing into the combustion gas exhaust pipe, and can perform good regeneration of the filter.

A second object of the present invention is to solve the problem of the conventional exhaust gas removing apparatus for an internal combustion engine,
To provide an exhaust particulate removal device for executing a filter regeneration process during traveling, in which the outer periphery of the filter being regenerated is hard to be cooled by traveling wind and cracks are less likely to occur in the filter during regeneration. is there.

[0011]

The first feature of the exhaust particulate removal device for an internal combustion engine of the present invention that achieves the above object is that the exhaust particulate removal device for an internal combustion engine mounted on a vehicle includes the exhaust gas. During regeneration of the particulate filter that collects the particulates that are collected, secondary air is introduced into the filter, and the combustion gas of the particulates that is collected in the filter is separated with the filter being independent of the exhaust gas passage. In a regeneration type exhaust fine particle removal device that discharges to the outside separately from the exhaust gas of the engine by a combustion gas exhaust pipe, restricts the inflow of running wind when the vehicle is running near the opening of the combustion gas exhaust pipe to the outside air. There is a limiting means. A second feature is that the combustion gas discharge pipe is arranged so that the combustion gas discharged from the combustion gas discharge pipe or the combustion gas before being discharged comes into contact with the outer circumference of the case of the filter. is there.

[0012]

According to the device for removing exhaust particulates of an internal combustion engine of the present invention, since the restricting means for restricting the inflow of the running wind when the vehicle is running is provided near the opening of the combustion gas exhaust pipe, the running wind burns. Does not flow through the opening of the gas exhaust pipe. Further, since the combustion gas exhaust pipe is arranged so that the combustion gas exhausted from the combustion gas exhaust pipe or the combustion gas before being exhausted comes into contact with the outer circumference of the case of the filter, the traveling wind is Even if the regeneration process is performed while the vehicle is traveling, the cooling of the outer peripheral portion of the filter is suppressed and the reliability of the regeneration process is improved even if the regeneration process is not performed through the opening.

[0013]

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. First, before explaining the structure of an exhaust particulate removal device of the present invention, the present invention will be described with reference to FIGS. 6 and 7. The mounting position of the exhaust particle removing device will be briefly described.
FIG. 7 shows an external appearance of a vehicle 70 equipped with the exhaust particulate removal device 10 for an internal combustion engine of the present invention. An example of the mounting position of the exhaust particulate removal device 10 is shown with a part of the vehicle 70 cut away. There is. Since the vehicle 70 of this embodiment is a shared vehicle and is driven by rear wheels, the exhaust particulate removal device 10 of the present invention is under the floor between the front wheels 71 and the rear wheels 72, and
It is arranged at the rear of the entrance 73.

FIG. 6 is a plan perspective view of the vehicle 70 shown in FIG. 7, and shows only a portion related to the exhaust particle removing apparatus 10 of the present invention. In FIG. 6, 60 is a vehicle body frame, 61 is a diesel engine, 62 is a fuel tank,
Reference numeral 63 is a battery mounted on the vehicle, 64 is a propeller shaft, 65 is a differential gear, 66 is an exhaust pipe of the engine 61, 67 is a muffler, 71 is a front wheel, 72 is a rear wheel, and 73 is an entrance to the vehicle 70. .

The exhaust particulate removing device 10 of this embodiment has two
It is a dual type in which two filters are arranged in parallel, and is provided in the middle of the exhaust pipe 66 on the upstream side of the muffler 67. The exhaust particle removal device 10 is arranged at the side of the vehicle frame 60 on which the fuel tank 62 is not mounted, between the front wheels 71 and the rear wheels 72, and behind the vehicle entrance / exit 73. Further, in the exhaust particulate remover 10 of this embodiment, when the collected particulates are ignited in the regeneration process, the electric heater provided at the end of the particulate filter is energized for ignition. The exhaust particle removal device 10 is provided with a battery 63 via a control device 20 having a semiconductor relay or the like built therein.
Power is supplied as shown by the thick line.
21 and 22 are exhaust particulate removal devices 10 during this regeneration process.
An air cleaner and an air pump for supplying secondary air to the.

FIG. 1 shows the construction of an embodiment of the exhaust particulate removing apparatus 10 of the present invention, and shows the construction of a dual type particulate filter. Therefore, in this embodiment, the exhaust pipe 66 is divided into two in the branch portion 11.
The first exhaust pipe 6 that is branched and is outside the frame 60
The filter unit 1A having the first particulate filter incorporated therein is attached to 6A, and the filter unit 1A incorporating the first particulate filter is attached to the second exhaust pipe 66B inside the frame 60. Then, the exhaust gas downstream sides of the filter parts 1A and 1B are merged at the merging part 12 by the first exhaust pipe 66A and the second exhaust pipe 66B, respectively, to form one exhaust pipe 66.

Although not shown in the drawings, the filter portions 1A and 1B accommodate, in their cases 2A and 2B, particulate filters having honeycomb-shaped partition walls made of a porous material. Is plugged alternately with an exhaust gas inflow side and an exhaust gas outflow side by a ceramic blocking material, and when the inflowing exhaust gas enters the filter from the side without plugging and passes through the partition wall, The partition collects the particulates and discharges them out of the filter through the unplugged hole on the opposite side. Then, power is supplied to the electric heater provided at the end of such a filter through the connectors 5A and 5B.

Further, in this embodiment, the filter unit 1A,
The length of the first exhaust pipe 66A is shorter than that of the second exhaust pipe 66B on the exhaust upstream side of 1B, and the second exhaust pipe 66 is on the exhaust downstream side of the filter units 1A and 1B.
The length of B is shorter than that of the first exhaust pipe 66A, so that the filter unit 1 from the diesel engine 61 shown in FIG.
The distances to A and 1B are different. The length of the first exhaust pipe 66A on the exhaust upstream side of the filter portion 1A and the length of the second exhaust pipe 66B on the exhaust downstream side of the filter portion 1B are equal, and the length of the second exhaust pipe 66B on the exhaust upstream side of the filter portion 1B is equal. Exhaust pipe 6
6B and the length of the first exhaust pipe 66A on the exhaust downstream side of the filter unit 1A are equal, and the exhaust pipes 66A, 6A are
The cases 2A and 2B of the filter units 1A and 1B are attached to the 6B via the flanges 7A, 7B, 8A and 8B in a substantially parallel and close manner. Reference numerals 13 and 14 are a part of a support mechanism for the vehicle body frame 60 of the exhaust particulate removal device 10. However, since these configurations are not directly related to the present invention, description thereof will be omitted.

Further, the first and second exhaust pipes 66A, 66B
When the filter parts 1A and 1B are attached to the filter parts 1A and 1B, in this embodiment, the connectors 5A and 5B provided on the cases 2A and 2B of the filter parts 1A and 1B are tilted by a predetermined angle from the vertical direction on the sides facing each other. It is arranged. As a result, the height including the lead wires connected to the connectors 5A and 5B is lower than that in the case where the connectors 5A and 5B are mounted vertically, and the space efficiency is improved. Compared to the case where the connectors 5A and 5B are mounted in the horizontal direction, the exposed area of the connectors 5A and 5B on the road surface side is smaller and the gap between the filter portions 1A and 1B can be narrowed. There is less damage to the leads that connect to it.

By the way, in FIG. 1, the merging portion 12 is provided with the control valve V2 for switching the flow paths of the exhaust pipes 66A and 66B as described in FIG.
A supply mechanism for secondary air is provided, and the on-off valves V4 and V5
Secondary air supply pipe 85 from the electric air pump 84 equipped with
Are connected. On the other hand, the branch portion 11 has an exhaust pipe 66A,
A control valve V1 for switching the flow path of 66B is provided, a combustion gas discharge mechanism is provided, and a combustion gas discharge pipe 86 having open / close valves V6, V7, V8 is connected. A nozzle 15 for preventing the running wind from flowing into the combustion gas discharge pipe 86 is attached to the tip opening 87 of the combustion gas discharge pipe 86 by a flange 9. In this nozzle 15, traveling wind is discharged by the combustion gas exhaust pipe 86.
A combustion gas guide portion 15a that also serves as heat radiation is provided to prevent the tip opening 87 from entering.

2 (a) and 2 (b) show the combustion gas exhaust pipe 86.
9 shows another embodiment of the nozzle 15 attached to the tip opening 87 of the. In the figure, 9 is this nozzle 1
5 is a flange for attaching to the tip opening portion 87 of the combustion gas discharge pipe 86, and a combustion gas guide portion 15a also serving as heat dissipation is provided at the tip portion of the nozzle 15. In addition, in this embodiment, a plurality of fins 15c for rectifying the traveling wind and cooling the main body 15b are attached to the main body 15b of the nozzle 15.

As described above, when the nozzle 15 is provided at the tip opening 87 of the combustion gas exhaust pipe 86, in the exhaust particulate removing device for executing the filter regeneration process during traveling, traveling wind is introduced into the combustion gas exhaust pipe 87. Inflow is suppressed,
The particulate combustion gas is discharged smoothly.
As a result, an appropriate secondary air can always be supplied to the filter being regenerated, and the filter can be regenerated satisfactorily.

FIG. 3 shows another embodiment of the structure of the exhaust particle removing device 10 of the present invention. This embodiment differs from the structure of the exhaust particle removing apparatus 10 of the embodiment shown in FIGS. 1 and 2 in that the tip opening 87 of the combustion gas discharge pipe 86 is different.
Since it is only the structure of the discharge path of the combustion gas from the above, the same components as those in FIGS. 1 and 2 are denoted by the same reference numerals. Therefore, 1A and 1B are filter parts, 2A and 2B are cases,
5A and 5B are connectors, 7A, 7B, 8A and 8B are flanges, 11 is a branching part, 12 is a merging part, 13 and 14 are a part of a support mechanism for the vehicle body of the exhaust particulate removal device 10, and 60 is a vehicle body frame, 66 is the exhaust pipe, 66A, 66B are the first and
Second exhaust pipe, 86 is combustion gas exhaust pipe, 85 is secondary air supply pipe, 87 is tip opening of combustion gas exhaust pipe, V1, V
Reference numeral 2 is a control valve, and V4 to V8 are opening / closing valves.

In this embodiment, the combustion gas introduction pipe 16 is connected to the tip opening 87 of the combustion gas discharge pipe 86,
The tip portion of the combustion gas introduction pipe 16 is branched into two parts, a first combustion gas introduction pipe 16A and a second combustion gas introduction pipe 16
It is B. On the other hand, the outer case 2 of the particulate filter built in the above-mentioned filter units 1A and 1B.
Covers 30A and 30B having a gap between the cases 2A and 2B are attached to A and 2B on the entire circumferences of the cases 2A and 2B or part of the cases. And
The combustion gas intake 3 is provided at one end of the covers 30A and 30B.
1A and 31B are provided, and the gaps between the covers 30A and 30B and the cases 2A and 2B are combustion gas passages 32A and 32B.
B, and the combustion gas inlets 31A and 31B are provided at the other end.
Combustion gas discharge ports 33A and 33B having nozzles 15A and 15B attached to the tip ends thereof are provided at positions farthest from.

FIG. 4 illustrates how the covers 30A and 30B are attached to the cases 2A and 2B. The covers 30A and 30B of this embodiment are attached to the lower half circumferences of the cases 2A and 2B,
An outer peripheral surface 30a concentric with the outer periphery of the cases 2A and 2B,
Front and rear walls 3 for forming combustion gas passages 32A, 32B
0b, 30c and an upper wall 30d. Combustion gas inlets 31A and 31B are provided at one ends of the outer peripheral surfaces 30a of the covers 30A and 30B on the front and rear walls 30b side. The combustion gas inlets 31A and 31B are provided with the first combustion gas introduction pipe 1
Either 6A or the second combustion gas introduction pipe 16B is connected. In addition, the covers 30A, 30
Combustion gas discharge ports 33A, 33B are provided at the farthest positions from the combustion gas intake ports 31A, 31B at one end of the outer peripheral surface 30a of B on the side of the front and rear walls 30c.
Nozzles 15A and 15B similar to those in the embodiment of FIG. 1 are attached to the tip ends of 3A and 33B.

FIG. 5 shows the shape of another embodiment of the covers 30A and 30B. Cover 30 of this embodiment
A and 30B are attached to the entire circumference of the cases 2A and 2B, and include an outer peripheral surface 30a that is concentric with the outer periphery of the cases 2A and 2B, and front and rear walls 30b and 30c that close the front and rear direction of the outer peripheral surface 30a. I have it. Also in this embodiment, combustion gas inlets 31A and 31B are provided at one ends of the outer peripheral surfaces 30a of the covers 30A and 30B on the front and rear walls 30b side, and the combustion gas inlets 31A and 31B are provided with the first combustion gas introduction pipe 16A or Any of the second combustion gas introduction pipes 16B is connected. Also, the covers 30A, 3
The combustion gas exhaust ports 33A, 33B are provided at the farthest positions from the combustion gas intake ports 31A, 31B at one end of the outer peripheral surface 30a of the 0B on the side of the front and rear walls 30c, and the tip ends of the combustion gas exhaust ports 33A, 33B are provided. Are equipped with nozzles 15A and 15B similar to those of the embodiment of FIG.

In this way, the covers 30A and 30B having the combustion gas passages 32A and 32B inside are attached to the entire or part of the cases 2A and 2B of the filter portions 1A and 1B, and the tip opening of the combustion gas discharge pipe 86 is provided. By flowing the combustion gas discharged from the portion 87 into the combustion gas passages 32A and 32B, the filter portions 1A and 1B are heated by the combustion gas during the regeneration process during traveling. Therefore, even if the regeneration process is performed during traveling, the cooling of the outer peripheral portion of the filter is suppressed by the traveling wind, and the reliability of the regeneration process is improved. Further, since the nozzles 15A and 15B are provided at the tip ends of the combustion gas discharge ports 33A and 33B attached to the covers 30A and 30B, the running wind is prevented from flowing into the covers 30A and 30B, and the particulate combustion gas. Is discharged smoothly. As a result, an appropriate secondary air can always be supplied to the filter being regenerated, and the filter can be regenerated satisfactorily.

In the embodiment described above, the covers 30A and 30B having the combustion gas passages 32A and 32B inside are attached to the entire or part of the cases 2A and 2B of the filter portions 1A and 1B to discharge the combustion gas. The combustion gas discharged from the tip opening portion 87 of the pipe 86 is made to flow into the combustion gas passages 32A and 32B. However, the nozzle 15 described in FIGS. 1 and 2 is used for the case 2 of the filter portions 1A and 1B.
It is arranged in the vicinity of the upstream side of A, 2B so that the combustion gas discharged from the tip opening 87 of the combustion gas discharge pipe 86 flows while contacting the cases 2A, 2B of the filter parts 1A, 1B during the regeneration process during traveling. Even so, the combustion gas during the regeneration process during traveling heats the filter portions 1A and 1B, and the cooling of the outer peripheral portion of the filter is suppressed by the traveling wind, thus improving the reliability of the regeneration process.

[0029]

As described above, according to the exhaust particle removing apparatus for the internal combustion engine of the present invention, the restricting means for restricting the inflow of the running air when the vehicle is running is provided near the opening of the combustion gas exhaust pipe. Therefore, the traveling wind does not flow in from the opening of the combustion gas exhaust pipe, and a good regeneration process can be executed during traveling.
Further, near the opening of the combustion gas exhaust pipe to the atmosphere, restriction means is provided for restricting the inflow of traveling wind when the vehicle is traveling, and the combustion gas of the filter is discharged before or after being discharged to the outside. In the case of being arranged so as to contact the outer periphery of the case, in addition to being able to prevent the inflow of traveling wind from the opening of the combustion gas exhaust pipe even if regeneration processing is performed during traveling,
The cooling of the outer peripheral portion of the filter due to the running wind is suppressed, and the reliability of the regeneration process is improved.

[Brief description of drawings]

FIG. 1 is a plan view showing the configuration of an embodiment of an exhaust particulate removal device for an internal combustion engine of the present invention.

2 shows another embodiment of the combustion gas discharge end of FIG. 1, (a) is a side view thereof, and (b) is a front view thereof.

FIG. 3 is a plan view showing the configuration of another embodiment of the exhaust particulate removal system for an internal combustion engine of the present invention.

4 is a detailed view of a filter cover provided in the middle of the combustion gas exhaust pipe of FIG. 3, (a) is a side view showing a state where the filter cover is attached to a filter case, and (b). FIG. 7A is a local cross-sectional view taken along the line AA of (a), and (c) is a perspective view showing a state where the filter cover is removed from the filter case.

5 is a perspective view showing details of another embodiment of the filter cover provided in the middle of the combustion gas discharge pipe of FIG. 3, and showing a state in which the filter heating unit is removed from the filter case.

FIG. 6 is a perspective view showing a main part of a vehicle in which the exhaust particulate removal device of the present invention is mounted.

FIG. 7 is a partially cutaway perspective view showing a mounting position of an exhaust particulate removal device of the present invention on a vehicle.

FIG. 8 is an explanatory diagram showing the flow of exhaust gas and regeneration air and the flow of combustion gas during regeneration processing in a conventional dual type exhaust particulate removal device.

[Explanation of symbols]

 1A, 1B ... Filter part 2A, 2B ... Case 5A, 5B ... Connector 7A, 7B, 8A, 8B ... Mounting flange 10 ... Exhaust particulate removal device 11 ... Branch part 12 ... Junction part 15A, 15B ... Nozzle 16, 16A, 16B ... Combustion gas introduction pipe 20 ... Control circuit 21 ... Air cleaner 22 ... Air pump 30A, 30B ... Cover 31A, 31B ... Combustion gas intake 32A, 32B ... Combustion gas passage 33A, 33B ... Combustion gas discharge port 60 ... Body frame 61 ... Diesel engine 62 ... Fuel tank 63 ... Battery 66, 66A, 66B ... Exhaust pipe 67 ... Muffler 70 ... Vehicle equipped with exhaust particulate removal device of the present invention 71 ... Front wheel 72 ... Rear wheel 73 ... Entry / exit 86 ... Combustion gas Exhaust pipe 85 ... Secondary air supply pipe 87 ... Tip opening of combustion gas exhaust pipe V1, V2 ... Control V4~V8 ... opening and closing valve

Claims (2)

[Claims] 1. An exhaust particulate removal device for an internal combustion engine mounted on a vehicle, wherein the particulate filter for collecting particulates contained in the exhaust gas is regenerated,
Secondary air flows into the filter, and the particulate combustion gas collected in the filter in a state where the filter is independent of the exhaust gas passage is separated from the exhaust gas of the engine by a combustion gas exhaust pipe. In the regeneration type exhaust fine particle removal device for discharging the exhaust gas of the internal combustion engine, in the vicinity of the opening of the combustion gas exhaust pipe to the outside air, a limiting means for limiting the inflow of traveling wind when the vehicle is traveling is provided. Particle removal device. 2. The combustion gas discharge pipe is arranged so that the combustion gas discharged from the combustion gas discharge pipe or the combustion gas before being discharged contacts the outer circumference of the case of the filter. The exhaust particulate removal device for an internal combustion engine according to claim 1.