KR20130013436A - Apparatus for exhaust gas filtering used in vehicle - Google Patents

Abstract

PURPOSE: An exhaust gas purification device for vehicle is provided to have a compact structure and reduce length of the exhaust gas purification device as a sensor for sensing the state of exhaust gas is mounted on a flange. CONSTITUTION: An exhaust gas purification device(100) for vehicle includes cases, a filtering unit, and flanges. The cases include inlets and outlets(131). The filter unit is placed in the case and removes exhaust matters in exhaust gas. The flanges divide the cases in a flow direction of the exhaust gas and support both ends of the filtering unit and case at the same time. The flanges are extended towards the outside of the case, and comprise coupling units and support units. The support units comprise filter support units and case support units formed outside of the filter support units which protrude towards the center of the case.

Description

Exhaust gas filter for vehicle {APPARATUS FOR EXHAUST GAS FILTERING USED IN VEHICLE}

The present invention relates to a vehicle exhaust gas filtration device, and more particularly to a vehicle exhaust gas filtration device having a flange which can support not only the filtration unit but also the case and the mat and can be mounted with the sensor.

In general, diesel vehicles using diesel engines are discharged into the atmosphere due to the incomplete combustion of diesel fuel, diesel particulates such as carbon monoxide, hydrocarbons, and nitrogen oxides. Recently, diesel engines having significantly reduced emissions of carbon monoxide and hydrocarbons due to incomplete combustion have been developed and used as diesel engines have improved performance.

However, nitrogen oxides (NO _X ), which occupy most of the exhaust gas of diesel engines, are reduced to nitrogen gas (N ₂ ) by a separate exhaust gas reducing device and are discharged. Accordingly, vehicles using existing diesel engines Exhaust gas reduction apparatus using selective catalytic reduction, which has a relatively high treatment efficiency of nitrogen oxides, has been researched and developed in comparison with the exhaust system.

The muffler applying the selective catalytic reduction method injects and mixes ammonia (NH 3) in an exhaust gas containing nitrogen oxide (NOX), which is a hazardous substance, and mixes the mixed gas at a temperature between 200 and 400 degrees Celsius in the muffler. By passing through it, it is possible to simultaneously perform the function of a converter that reduces nitrogen oxides and decomposes into harmless nitrogen gas (N2) and water (H2O) and a muffler that reduces noise.

Such a muffler supports and fixes the catalyst to a muffler case and a separator that forms an air gap between the case and the catalyst in order to mount and fix the selective reduction catalyst inside the muffler and to secure the flow of gas. And a stoppering to make it.

Since the stopper ring and the separation plate are formed as separate parts, the manufacturing process for installing the stopper ring and the separation plate inside the muffler case is cumbersome, and there is a problem in that the production cost increases.

In addition, productivity may be reduced because the number of parts to be welded to fix the stopper and the separator plate inside the muffler case increases .

In order to solve this problem, the present applicant has proposed a vehicle muffler in which a stopper ring and a separator are integrated in Korean Patent Application No. 10-2009-0088007. However, even in the case of a vehicle muffler in which the stopper and the separator are integrated, there is still a problem in that productivity is reduced due to the presence of the welded part when manufacturing the muffler because the case is joined to the separator by welding. Since the sensor is installed in the case to detect the temperature of the exhaust gas, etc., the length of the case is long, which makes it difficult to make a compact form. In addition, since the filter case is fixed to the separator plate simply by forcibly fitting, there is also a problem that the durability is not great.

The present invention provides a vehicle exhaust gas filtration device that can support both the case, the filtration unit and the mat by using one member of the flange.

The present invention provides a vehicle exhaust gas filtering device that can reduce the overall length and implement a compact configuration by mounting a sensor for detecting the state of the exhaust gas on the flange supporting both ends of the filtration unit.

The present invention provides a vehicle exhaust gas filtration device that can increase the productivity and reduce the production cost because the number of parts can be reduced.

In order to achieve the above object, the vehicle exhaust gas filtering apparatus according to an embodiment of the present invention, the exhaust gas inlet and exhaust gas discharge unit on each side; A filtering unit provided inside the case and removing the soot material contained in the exhaust gas; And a flange dividing the case along a flow direction of the exhaust gas and simultaneously supporting both ends of the case and both ends of the filter part surrounding the outer surface of the filter part.

By supporting both the filtration unit and the case using only the flange as described above, it is possible to reduce the number of parts required for the exhaust gas filtration device, to reduce the production cost, and to increase the space utilization around the filtration device by reducing the length of the filtration device. have.

The flange extends toward the outside of the case and is bent at the fastening portion along the flow direction of the fastening portion and a fastening portion provided with a plurality of fastening holes along the circumferential direction of the case, and both ends of the filtering portion and the case. It may include a support for supporting both ends.

The support part may include a filter support part protruding toward the center of the case and a case support part formed outside the filter support part with respect to the center of the case.

The filter supporter may support and support the longitudinal section and the side surface of the filter unit.

The case support may be formed to overlap both ends of the case.

The case support portion may be provided with a receiving groove for receiving both ends of the case.

The case support part may include a first support part which contacts and supports the longitudinal end of the case and a second support part and a third support part which are formed on both sides of the first support part to support the longitudinal both sides of the case, respectively.

A mat support part may be formed between the filter support part and the case support part to support both ends of the mat provided inside the case and surround the outer surface of the filtering part, and the mat support part may be extended to overlap one end of the case. .

The fastening hole may protrude outward from the outer circumferential surface of the fastening part.

The flange may be provided with a sensor mounting portion for mounting the sensor in a direction parallel to the diameter of the flange. In this way, since the sensor mounting portion is formed on the circumference of the flange, the sensor can be mounted at an appropriate position by rotating the flange at any position on the circumference of the flange.

The sensor mounting part may be formed to penetrate through the sensor mounting part in a direction crossing the fastening hole.

As described above, the vehicle exhaust gas filtering device according to an embodiment of the present invention can support and fix both the filtration unit, the case, and the mat by using a flange formed of a single product, thereby reducing the number of parts and improving productivity. It can increase and reduce manufacturing costs.

Vehicle exhaust gas filtering device according to an embodiment of the present invention can be equipped with a sensor on the flange without mounting the sensor in the case can reduce the overall length of the filtration device, the utilization of the space around the filtration device It can increase.

Since the vehicle exhaust gas filtering device according to an embodiment of the present invention is mounted on the flange, the vehicle is not limited to the mounting position of the sensor, and the compatibility of the flange can be improved.

The vehicle exhaust gas filtration device according to an embodiment of the present invention can easily determine the mounting position of the sensor by rotating the flange and can prevent the mounting position of the sensor from being limited by the shape of the flange.

1 and 2 are a perspective view showing a vehicle exhaust gas filtering apparatus according to an embodiment of the present invention.
Figure 3 is a perspective view showing a flange and a case used in the filtration apparatus according to an embodiment of the present invention.
4 is a partial cross-sectional perspective view illustrating an assembly structure of the flange and the case according to FIG. 3.
5 is a perspective view of the flange according to FIG. 4.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a configuration and operation according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. The following description is one of several aspects of the patentable invention and the following description forms part of the detailed description of the invention.

In the following description, well-known functions or constructions are not described in detail for the sake of clarity and conciseness.

1 and 2 are a perspective view showing a vehicle exhaust gas filtering device according to an embodiment of the present invention, Figure 3 is a perspective view showing a flange and a case used in the filtering device according to an embodiment of the present invention, Figure 4 3 is a partial cross-sectional perspective view illustrating an assembly structure of the flange and the case according to FIG. 3, and FIG. 5 is a perspective view of the flange according to FIG. 4.

1 and 2, a vehicle exhaust gas filtering device 100 according to an embodiment of the present invention includes a case in which exhaust gas inlet 111 and exhaust gas outlet 131 are respectively provided at both sides thereof. 120); A filtering unit 180 provided in the case and removing the soot material contained in the exhaust gas; And flanges 150 and 160 which divide the case along the flow direction of the exhaust gas and simultaneously support both ends of the case and both ends of the filter part surrounding the outer surface of the filter part.

By supporting both the filtration unit 180 and the case using only the flange 150 as described above, the number of parts required for the exhaust gas filtration device can be reduced, the production cost can be reduced, and the length of the filtration device is reduced by reducing the length of the filtration device. It can increase the usability.

Vehicle exhaust gas filtering device 100 according to an embodiment of the present invention is used for vehicles, heavy equipment, construction equipment, such as diesel (diesel) or diesel, but is not necessarily limited to such a diesel vehicle, but also applies to gasoline vehicles can do.

Hereinafter, for convenience of description, a case in which the vehicle exhaust gas filtration device 100 according to an embodiment of the present invention is applied to a diesel vehicle will be described as an example. Vehicle exhaust gas filtering apparatus 100 according to an embodiment of the present invention is a device for reducing or filtering the soot material contained in the exhaust gas generated in the diesel vehicle.

In order to filter the soot material, the exhaust gas must be able to pass through the filtration device 100. To this end, the exhaust gas inflow for the inflow of the exhaust gas is provided at one end in the longitudinal direction of the filtration device 100 according to an embodiment of the present invention. A part 111 may be provided and an exhaust gas discharge part 131 for discharging the filtered exhaust gas may be provided at the other end side.

As shown in FIGS. 1 and 2, the filtration apparatus 100 includes cylindrical cases 120 and 130 having a generally constant length, and exhaust gas inlets 111 and exhausts at both ends in the longitudinal direction of the cases 120 and 130. Gas outlets 131 may be formed respectively. Referring to the drawings, the filtering device 100 can be divided into three parts. That is, the first case 110 having the exhaust gas inlet 111, the third case 130 having the exhaust gas outlet 131, and the second case formed between the first and third cases 110 and 130. 120 may be included.

Since the exhaust gas inlet 111 is formed on one side of the first case 110, the flow direction of the exhaust gas introduced through the first case 110 is changed to change the length direction of the cases 110, 120, and 1130. It must flow along. At this time, the exhaust gas introduced through the exhaust gas inlet 111 is convex toward the inside of the case (110, 120, 130) at the end of the first case 110, as shown in FIG. Protruding flow conversion portion 112 may be formed. When the exhaust gas collides with the protruding portion of the flow converting unit 112, the flow direction of the exhaust gas is switched to meet the entirety of the filtration unit 180 provided in the second case 120 and the exhaust gas.

Fastening means for fastening both may be provided between the first case 110 and the second case 120. As shown in the figure, the first flange 140 is fixed to the first case 110 and the second flange 150 is fixed to one end of the second case 120 is formed, the first flange ( 140 and the second flange 150 may be connected to each other using fastening members such as nuts and bolts. At this time, it is preferable to use a sealing material (not shown) so that the exhaust gas does not leak between the first and second flanges 140 and 150.

Meanwhile, at least one of the first plan 140 or the second flange 150 may be provided with a fastening part (not shown) for fixing the filtration device 100 to the surrounding structure or fastening other components.

1 and 2 illustrate a case where the first and second flanges 140 and 150 are formed, respectively, but connects the first and second cases 110 and 120 to each other using only one of the first and second flanges 140 and 150. It may be. The same applies to the third flange 160 and the fourth flange 170 to be described later. That is, the second case 120 and the third case 130 may be connected using only one of the third flange 160 and the fourth flange 170.

Similar to the connection structure of the first and second cases 110 and 120, the third flange 160 and the fourth flange 170 may be used to connect the third and fourth cases 120 and 130 to each other. That is, the other end of the second case 120 is fixedly mounted to the third flange 160 and one end of the third case 130 is fixedly mounted to the fourth flange 170, and in this state, the third flange 160 is fixed. And by fastening the fourth flange 170 using a fastening member such as nuts and bolts it is possible to seal the entire case (110, 120, 130) of the filtering device (100).

Similar to the first and second flanges 140 and 150, at least one of the third and fourth flanges 160 and 170 is provided with a fastening part (not shown) for fixing the filtration device 100 to the surrounding structure or fastening other components. A sealing material (not shown) for sealing may be provided between the third and fourth flanges 160 and 170.

The end of the first case 110 and the end 132 of the third case 130 are different in shape. That is, as shown in Figure 1, the end portion 132 of the third case 130 has a somewhat convex shape toward the outside of the case (110, 120, 130). Here, the exhaust gas discharge part 131 may be formed at a point substantially diagonal to the exhaust gas inlet 111 based on the center of the case (110, 120, 130). However, the relative positions of the discharge part 131 and the inlet part 111 shown in FIG. 1 is just one example and are not necessarily limited thereto.

Hereinafter, the second and third flanges 150 and 160 supporting both the second case 120 and the filtration unit 180 provided therein will be described with reference to the drawings.

3 to 5, the second and third flanges 150 and 160 extend toward the outside of the second case 120 and include a plurality of fastening holes 151a and 161a along the circumferential direction of the second case 120. A support part 159 which is bent at the fastening parts 151 and 161 along the flow direction of the exhaust gas, and supports both ends of the filtration part 180 and both ends of the second case 120. It may include.

Here, the fastening holes 151a and 161a may protrude outward from the outer circumferential surfaces of the fastening parts 151 and 161. As shown in FIG. 3, the fastening holes 151a and 161a formed in the fastening parts 151 and 161 protrude outward from the outer circumferential surface of the fastening parts 151 and 161 to take advantage of the space formed between the fastening holes 151a and 161a. In addition, the outer diameters of the fastening parts 151 and 161 may be reduced, and raw materials required for manufacturing the flanges 150 and 160 may be saved, thereby reducing the production cost.

The fastening parts 151 and 161 of the second and third flanges 150 and 160 extend along the radial direction of the second case 120, whereas the support part 159 supporting the filtering part 180 and the second case 120 is provided. ) May be formed along the length direction of the second case 120. Accordingly, the fastening part 151 and the support part 159 may be integrally formed but bent at approximately right angles to each other. At this time, it is obvious that the fastening part 151 and the support part 159 may not only be integrally formed but also may be formed separately.

The support part 159 includes a filter support part 153 protruding toward the center of the second case 120 and case support parts 155 and 156 formed outside the filter support part 153 with respect to the center of the second case 120. can do.

Referring to FIG. 4, the mat 181 is positioned inside the second case 120, and the filtration unit 180 is positioned inside the mat 181. At this time, it is preferable that both ends of the second case 120 extend longer than both ends of the filtration unit 180 and the mat 181. As shown in FIG. 4, the second and third flanges 150 and 160 of the vehicle exhaust gas filtering device 100 according to an embodiment of the present invention are themselves a second case 120 and a filter case 182. ), The mat 181 and the filter unit 180 can be supported and fixed. Therefore, the filtration device 100 according to an embodiment of the present invention does not need to use a separate member such as a stopper to support or fix both ends of the filtration unit 180.

The filter supporter 153 supporting or fixing both ends of the filter unit 180 may contact and support the longitudinal cross section and the side surface of the filter unit 180. Referring to FIG. 4, the filter supporter 153 may have a stepped portion formed at one end thereof, and the stepped portion may support or fix the filter 180 while simultaneously contacting the longitudinal section and the side surface of the filter 180. The filter support part 153 protrudes toward the center of the second case 120 along the radial direction of the second case 120 in order to support both ends of the filtration part 180 protruding longer than both ends of the mat 181. Part can be formed.

While the filter supporter 153 is formed near the center of the second case 120, the case supporters 155 and 156 supporting both ends of the second case 120 may be formed outside the filter supporter 153. Here, the case support parts 155 and 156 may be formed to overlap both ends of the second case 120.

As shown in FIG. 4, the case support parts 155 and 156 may be formed to surround both ends of the second case 120 in three directions. To this end, the case supporting parts 155 and 156 may be provided with receiving grooves 155 for receiving both ends of the second case 120. The receiving groove 155 may be formed between the mat support part 154 to be described later and the case outer support part 156 which contacts and supports the outer surfaces of both ends of the second case 120.

In other words, the case support parts 155 and 156 may be formed on both the first support part 155 and the first support part 155 to contact and support the longitudinal ends of the second case 120. It may include a second support 154 and a third support 156 for supporting the longitudinal both sides. Here, the first to third support parts 154, 155, and 156 may form receiving grooves for receiving both ends of the second case 120.

Meanwhile, a chamfer (not shown) may be formed in the second support part 154 and the third support part 156. That is, a chamfer is formed at a corner portion adjacent to the longitudinal inner and outer sides of the second case 120 among the long portions of the second support part 154 and the third support part 156 to form both ends of the second case 120. When approaching the first support part 155, the case support parts 155 and 156 or the second case 120 may be prevented from being damaged.

In addition, a mat support 154 provided between the filter support 153 and the case support 155 and 156 to support both ends of the mat 181 that is provided inside the second case 120 to surround the outer surface of the filtration unit 180. Can be formed. Here, the second support part 154 described above may support both ends of the second case 120 and support both ends of the mat 181. That is, the surface formed in the longitudinal direction of the second case 120 among the surfaces of the second support part 154 supports the second case 120, and the surface formed in the radial direction of the second case 120 is a mat 181. ) Can be supported at both ends.

Here, the second support part to the mat support part 154 may be extended to overlap one end of the second case 120. That is, the surface formed in the longitudinal direction of the second case 120 among the surfaces of the second support part 154 may extend to overlap one end of the second case 120 to support the second case 120.

Meanwhile, as shown in FIG. 5, sensor mounting parts 162 may be formed in the second and third flanges 150 and 160 to mount a sensor (not shown) in a direction parallel to the diameters of the flanges 150 and 160. Thus, since the sensor mounting portion 162 is formed on the circumference of the flange (150, 160), even if the sensor is installed at any position on the circumference of the flange (150, 160) by rotating the flange (150, 160) is not limited to the mounting position of the sensor It is possible to mount the sensor in a proper position. A sensor (not shown) mounted on the sensor mounting unit 162 may detect a temperature, a flow rate, and the like of the exhaust gas flowing inside the filtration device 100.

The sensor mounting hole 162a may be formed through the sensor mounting portion 162 in a direction crossing the fastening hole 151a. Referring to FIG. 5, the fastening hole 161a formed in the fastening part 161 is formed in the longitudinal direction of the second case 120, while the sensor mounting hole 162a formed in the sensor mounting part 162 is the second case. It may be formed in the radial direction of (120).

As described above, the vehicle exhaust gas filtering apparatus 100 according to an embodiment of the present invention uses the one member of the flanges 150 and 160 to filter the filtration unit 180, the mat 181, and the case 120. Both can be supported or fixed, and since the sensor can be directly mounted on the flanges 150 and 160, the parts can be shared or the compatibility can be increased, and the number of parts of the filtration device 100 can be reduced. In addition, since the length of the filtration unit 180 can be reduced, the filtration apparatus 100 can be miniaturized.

As described above, in one embodiment of the present invention has been described by the specific embodiments, such as specific components and limited embodiments and drawings, but this is provided to help a more general understanding of the present invention, the present invention in the above embodiment The present invention is not limited thereto, and various modifications and variations can be made by those skilled in the art to which the present invention pertains. Accordingly, the spirit of the present invention should not be construed as being limited to the embodiments described, and all of the equivalents or equivalents of the claims, as well as the following claims, belong to the scope of the present invention .

100: vehicle exhaust gas filtering device
110,120,130: case
111: exhaust gas inlet
131: exhaust gas discharge unit
140,150,160,170: flange
151: fastening portion
159: support
180: filtration unit

Claims (11)

A case having an exhaust gas inlet and an exhaust gas outlet, respectively;
A filtering unit provided inside the case and removing the soot material contained in the exhaust gas; And
A flange dividing the case along a flow direction of the exhaust gas and simultaneously supporting both ends of the case and both ends of the filter part surrounding the outer surface of the filter part;
Vehicle exhaust gas filtering device comprising a.
The method of claim 1,
The flange
A fastening part extending toward the outside of the case and having a plurality of fastening holes along the circumferential direction of the case; And
And a support part bent at the fastening part along a flow direction of the exhaust gas and supporting both ends of the filtration part and both ends of the case.
The method of claim 2,
And the support part includes a filter support part protruding toward the center of the case and a case support part formed outside the filter support part with respect to the center of the case.
The method of claim 3,
The filter support portion is a vehicle exhaust gas filtration device, characterized in that for supporting the longitudinal section and the side surface of the filter portion.
5. The method of claim 4,
The case support part is a vehicle exhaust gas filtering device, characterized in that formed to overlap both ends of the case.
The method of claim 5,
The case support portion is a vehicle exhaust gas filtering device, characterized in that the receiving groove for receiving both ends of the case is formed.
The method of claim 5,
The case support part may include a first support part for contacting and supporting the longitudinal end of the case and a second support part and a third support part formed on both sides of the first support part to respectively support the longitudinal both sides of the case. Vehicle exhaust gas filtering device.
The method of claim 5,
A mat support part is formed between the filter support part and the case support part to support both ends of the mat provided inside the case to surround the outer surface of the filtration part.
The mat support portion is a vehicle exhaust gas filtering device, characterized in that formed to extend to overlap one end of the case.
9. The method according to any one of claims 2 to 8,
The fastening hole is a vehicle exhaust gas filtering device, characterized in that formed protruding outward than the outer peripheral surface of the fastening portion.
10. The method of claim 9,
The flange of the vehicle exhaust gas filtering device, characterized in that the sensor mounting portion for mounting the sensor in a direction parallel to the diameter of the flange.
The method of claim 10,
The sensor mounting portion is a vehicle exhaust gas filtering device, characterized in that the sensor mounting hole penetrates in a direction crossing the fastening hole.

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