WO2009096641A1

WO2009096641A1 - Exhaust gas filtering system for vehicles

Info

Publication number: WO2009096641A1
Application number: PCT/KR2008/004253
Authority: WO
Inventors: Suk Man Song
Original assignee: Suk Man Song
Priority date: 2008-01-31
Filing date: 2008-07-21
Publication date: 2009-08-06

Abstract

The present invention relates to an exhaust gas filtering system which can overcome problems that in prior art, the exhaust gas filtering system is manufactured individually according to a type of vehicles due to lack of compatibility of the exhaust gas filtering system, as there is a height difference between a piping line from a muffler and a piping line of a discharge manifold from an engine when connecting piping lines of the exhaust gas filtering system. Accordingly, the present invention has a structure enabling installing positions to vary independently of a type of vehicles and flange formed integrally with an outer casing of the system at one side and flange being coupled and separated to and from the system by a band, thereby to enable filters to easily install and to remove to and from the outer casing.

Description

EXHAUST GAS FILTERING SYSTEM FOR VEHICLES

Technical Field

[1] The present invention relates to an exhaust gas filtering system for a vehicle, and more specifically, to an exhaust gas filtering system having a variable structure being installed regardless of kinds of vehicle on one side of which a flange is formed integrally on a outer casing and on the other side of which a flange being treated bending through types of assembly and disassembly is formed whereby a plurality of filters inside the outer casing are replaced easily and bending effects are excellent. The present invention has been invented to solve the prior art in which when the exhaust gas filtering system is piped, the heights of exhaust manifolds running between a muffler and an engine are different depending on the kinds of vehicles and thus compatibility of the exhaust gas filtering system is limited, causing various kinds of exhaust gas filtering system to be manufactured depending on the kinds of vehicles.

[2]

Background Art

[3] Generally, a exhaust unit for a vehicle includes a exhaust pipe adapted for an exhaust gas discharged from a manifold of an engine to be exhausted outside and communicated to the manifold, and a muffler installed to be communicated to the exhaust pipe for reducing high pressure, high temperature heat and exhaust noise of the exhaust gas before discharging it.

[4] Recently, referring to the exhaust unit for a vehicle, a filtering system has to be installed on a vehicle, which intends to convert poisonous gas such as CO, HC, NOx or lead oxidation, etc., contained in the exhaust gas ignited in the engine and discharged therefrom into non-poisonous gas.

[5] The aforementioned exhaust gas filter system for a vehicle, as shown in Fig. 22, includes a cylindrical body 1 in which a filter is embedded, input hopper units 2 installed on one side of the cylindrical body 1, having an input port for the exhaust gas ignited inside a engine to be inputted therein through a manifold, and an output hopper unit 3 installed on the other side of the cylindrical body 1, having an output port for exhausting the purified gas wherein the input hopper unit 2 and the output hopper unit 3 are assembled on the left and right sides of the cylindrical body, respectively. Here, as shown in Fig., flange units 4 are formed on both ends of the cylindrical body 1 and respective flange units 5 corresponding to the aforementioned flanges are formed on the input hopper unit 2 and the output hopper unit 3, and thus the input hopper unit 2 and the output hopper unit 3 are assembled through the flange units 4, 5 using fixing device such as bolts.

[6] However, referring to the conventional exhaust gas filtering system, a plurality of fixing device such as bolts has to be disassembled for replacing or exchanging a filter inside therein when the system is assembled or disassembled, and further cleaned. Accordingly, the assembly and disassembly of the fixing devices are troublesome and further needs much time, causing maintaining and repairing works to be difficult and costing much expensive and much time.

[7] Accordingly, the present applicant proposed a connection configuration of the exhaust gas filtering system for a vehicle in Korean Utility Model application No. 423464 in order to solve the aforementioned drawbacks. According to the above connection configuration of the exhaust gas filtering system for a vehicle, it is configured such that an input filter and a middle filter are embedded into a connected outer casing opened in both directions and further a space is formed between the input filter and the middle filter wherein the connection outer casing is assembled and disassembled to the input hopper at one side and the output hopper at the other side. Here, the assembly and disassembly of the components are performed through a rotation, causing them to be simple and strengthening a fastening force.

[8]

[9] However, referring to the connection configuration of the exhaust gas filtering system for a vehicle, which is disclosed by the present applicant, the connection outer casing provided for strengthening the fastening force is configured to form a cylindrical body both ends of which are opened, and a plurality of connection hooks having bending part at its outmost end are provided in a same space for the outer peripheral surfaces of the connection outer casing to be connectable to peripheral parts of the input hopper unit and the middle hopper unit. Additionally, corresponding numbers of connection flanges are provided on the respective input hopper unit and the middle hoper unit. Therefore, according to the aforementioned configuration, the numbers of components increases, causing expensive cost.

[10]

[11] In addition, the above exhaust gas filtering system and the conventional exhaust gas filtering system for a vehicle are designed and configured to be adapted to respective kinds of vehicle and supplied.

[12]

[13] Accordingly, an exhaust gas filtering system adapted for one kind of vehicle is not compatible to another kind of vehicle since the locations of an exhaust line running from an engine and an exhaust line running from an engine are different and thus the exhaust gas filtering system adapted for only one kind vehicle has to be used.

[14] [15] Therefore, there arises a problem in that the exhaust gas filter system has to be manufactured for adapting to various kinds of vehicle and it causes to increase manufacturing cost, and further when a kind of vehicle is stopped manufacturing, the exhaust gas filtering system for that kind of vehicle has to be disposed, causing social expense high.

[16]

Disclosure of Invention Technical Problem

[17] Accordingly, the present invention has been proposed to solve the aforementioned drawbacks and one object of the present invention relates to provide an exhaust gas filtering system in which a plurality of filters is introduced into one cylindrical casing and bent on side outer peripheral surface thereof, thereby decreasing prominently the numbers of components and making easy replacement and fastening of filters.

[18] Additionally, another object of the present invention relates to provide an exhaust gas filtering system in which middle proper point of the other casing making up the exhaust gas filtering system is separate to provide a first outer casing connection to a exhaust line running to a muffler and a second outer casing connection to an exhaust line from an engine wherein the part on which the first outer casing and the second outer casing being faced is bent and a flange of the outer casing on one side is offset, and the offset outer casing is rotated depending on the vehicle conditions to be bent for fixing. Therefore, regardless of kinds of vehicle, the exhaust gas filtering system is compatible.

[19]

[20] Meanwhile, another object of the present invention relates to provide an exhaust gas filtering system in which the filer is easily replaced and easy working thereof is obtained.

[21]

Technical Solution

[22] In order to accomplish the first object, the present invention provides an exhaust gas filtering system comprising an outer casing and an inner casing being positioned within the outer casing, and further the system is fastened through the band fastener provided on the inner casing and a band for covering the protruded recess of the discharge hopper to be fastened to one end of the outer casing in which the inner casing is positioned and banding.

[23] Additionally, the present invention provides an exhaust gas filtering system for vehicles, comprising a first and the second outer casings faced each other, a first and a second inner casings being introduced inside the first and second outer casings, a spacer for forming spaces S between filters within the band fasteners contacting the inner casings when the filters are inserted into the first and the second inner casings, a band for surrounding and covering the band fasteners at ends of the first and the second inner casings , introduction side hopper and the discharge side hopper are offset in the central points of the first and the second outer casings and the first and the second inner casings, respectively.

Advantageous Effects

[24] According to the present invention, an exhaust gas filtering system having bending structure on one side thereof is provided whereby filters is introduced inside easily, causing to increase working efficiency and further avoiding leakage of exhaust gas due to bending on two parts according to the prior art, thereby avoiding pressure reduction in the exhaust gas filtering system and improving engine efficiency. [25] [26] Additionally, according to the present invention, an exhaust gas filtering system is provided which applies to various kinds of vehicles regardless of kinds of vehicle and further filters are easily introduced into. [27]

Brief Description of Drawings [28] Further objects and advantages of the invention can be more fully understood from the following detailed description taken in conjunction with the accompanying drawings in which: [29] Fig. 1 is a perspective view showing an exhaust gas filtering system for a vehicle fabricated according to the present invention; [30] Fig. 2 is an exploded perspective view showing the exhaust gas filtering system for a vehicle shown in Fig. 1 ; [31] Fig. 3 is a front sectional view showing the exhaust gas filtering system for a vehicle shown in Fig. 1 ; [32] Fig. 4 is a cross-sectional view showing the exhaust gas filtering system for a vehicle according to another embodiment shown in Fig. 3; [33] Fig. 5 is a side sectional view showing the exhaust gas filtering system for a vehicle shown in Fig. 1 ; [34] Fig. 6 is a perspective view showing a outer casing according to the present invention; [35] Fig. 7 is a front sectional view showing the exhaust gas filtering system for a vehicle shown in Fig. 6; [36] Fig. 8 is a side sectional view showing the exhaust gas filtering system for a vehicle shown in Fig. 6; [37] Fig. 9 is a perspective view showing an inner casing adapted for the present invention;

[38] Fig. 10 is a front sectional view showing the casing shown in Fig. 9;

[39] Fig. 11 is a side sectional view showing the casing shown in Fig. 9;

[40] Fig. 12 is an exploded perspective view showing a first outer casing and a second outer casing adapted for a second embodiment of the present invention;

[41] Fig. 13 is a front sectional view showing the first outer casing and the second outer casing shown in Fig. 12;

[42] Fig. 14 is a side sectional view showing the first outer casing and the second outer casing shown in Fig. 12;

[43] Fig. 15 is an exploded perspective view showing a first inner casing and a second inner casing adapted for a second embodiment of the present invention;

[44] Fig. 16 is a front sectional view showing the first inner casing and the second inner casing according to the second embodiment of the present invention wherein respective components are exploded;

[45] Fig. 17 is a side sectional view showing the first inner casing and the second inner casing shown in Fig. 12;

[46] Fig. 18 is a whole exploded perspective view showing the exhaust gas filtering system adapted for the second embodiment of the present invention;

[47] Fig. 19 is a front sectional view showing the assembled exhaust gas filtering system shown in Fig. 18;

[48] Fig. 20 is an enlarged sectional view showing a part A shown in Fig. 19;

[49] Fig. 21 is an exploded perspective view showing the exhaust gas filtering system adapted for the second embodiment of the present invention, which is exploded vertically; and

[50] Fig. 22 is a perspective view showing a prior exhaust gas filtering system.

[51]

Best Mode for Carrying out the Invention

[52] The object and effect of present invention may be implemented through two embodiments.

[53]

[54] FIRST EMBODIMENT

[55] The best mode according to the first embodiment of the present invention will be disclosed as follows. An exhaust gas filtering system for vehicles according to the first embodiment of the present invention comprises: an outer casing 10 having a plurality of protruded recesses 12 longitudinally formed in an inner periphery of the outer casing by an equal angle, one end of outer casing being opened into a same diameter and the other end thereof being formed integrally with an outer casing introduction hopper 11 in the form of a gradually reduced diameter;

[56] an inner casing 20 having longitudinally formed in an inner periphery of the outer casing 10 by an equal angle, and an end of the inner casing extending outwardly from a protruded step 23 and having a rounded band fastener 24 to surround one end edge of the outer casing, the other end thereof being formed with an inner casing introduction hopper 21 having a cone shape in the form of gradually reduced diameter from a step 21a, the inner casing 20 being positioned within the outer casing 10 and into which a plurality of filters F are inserted; a discharge side hopper 30 having a flange 31 contacted with the rounded band fastener 24 of the inner casing 20 and having a portion 32 having a same diameter extends horizontally from the flange 31 and then formed with a cone shape; a discharge side flange 40 connected to an end of the discharge side hopper 30; an introduction side flange 50 being coupled into the inner casing introduction hopper 21 of the inner casing 20; and a band 60 for covering and banding the rounded band fastener 24 of the inner casing 20 and the flange 31 of the discharge side hopper 30.

[57]

[58] SECOND EMBODIMENT

[59] The best mode according to the second embodiment of the present invention will be disclosed as follows. An exhaust gas filtering system for vehicles having a variable position structure according to the second embodiment of the present invention comprises: a first and the second outer casings 100, 100' having a plurality of protruded recesses 110, 110' being longitudinally formed on outer peripheries thereof by an equal angle, an introduction side hopper 120, and an discharge side hopper 120', other ends of the hoppers being contacted with each other; ; a first and a second inner casings 200, 200' having a plurality of recesses protruded from an inner periphery thereof by an equal angle, an introduction side hopper, and a discharge side hopper, and other ends of the hoppers being formed as band fasteners with a rounded one end which the band fasteners extend from the hoppers, respectively, and being inserted into the first and the second outer casings 100, 100', respectively; a spacer 300 for forming spaces S between filters within the band fasteners contacting the inner casings when the filters are inserted into the first and the second inner casings 200, 200'; a band 400 for surrounding and covering the band fasteners at ends of the first and the second inner casings 200, 200'; and a introduction side flange and a discharge side flange being welded to end inner peripheries of the introduction side hopper and the discharge side hopper, respectively; whereby a piping line from an engine and a piping line from a muffler are connected with each other.

[60] Mode for the Invention

[61] As the above described, the present invention relates generally to an exhaust gas filtering system for vehicles and more particularly relates to an exhaust gas filtering system for vehicles which has a more easer band fastening structure and enables a pipe conduit of an exhaust manifold from an engine to be varied, that is, has an active position change of the pipe conduit of an exhaust manifold dependent on the type of vehicle.

[62] To this end, a first and a second embodiments of the present invention are described and illustrate in the present application.

[63]

[64] FIRST EMBODIMENT

[65] As shown in Figs. 1 to 11, a first embodiment of the present invention provides an exhaust gas filtering system for vehicles which has a more easer banding structure and enables an inner filter to be exchanged more easily, the an exhaust gas filtering system comprising an outer casing 10, an inner casing 20 positioned within the outer casing, a discharge side hopper 30 coupled to an end of the inner casing 20, a discharge side flange 40 connected to an end of the discharge side hopper 30, an introduction side flange 50 formed integrally with other ends of the outer casing 10 and the inner casing 20 and connected to an inner casing introduction hopper contacted with an outer casing introduction hopper, and a band 60 for banding ends of the inner casing 20 and the discharge side hopper 30.

[66] The one end of outer casing 10 has an opened form into a same diameter and the other end thereof is formed integrally with an outer casing introduction hopper 11 in the form of a gradually reduced diameter, as shown in Figs. 1 and 2.

[67] Also, a plurality of protruded recesses 12 are longitudinally formed in an inner periphery of the outer casing 10 by an equal angle, the protruded recesses are protruded inwardly from the inner periphery of the outer casing.

[68] The protruded recesses mean that the protrusions 12 are protruded inwardly from the inner periphery of the outer casing 10, in order to form a plurality of spaces between the an inner surface of the outer casing 10 and an outer surface of the inner casing 20.

[69] That is, as shown in Figs. 6 to 8 being illustrated the outer casing 10 as plan view, it will be understood that the protrusions 12 are portions protruded inwardly from the inner periphery of the outer casing 10.

[70] The inner casing 20 is inserted into the outer casing 10. An end of the inner casing 20 is opened as a same diameter as the outer casing 10 and the other end thereof is formed integrally with a cone shape of the inner casing introduction hopper 21 similarly to the outer casing 10. [71] Further, a plurality of protruded recesses 22 are longitudinally formed in an inner periphery of the outer casing 10 by an equal angle, the protruded recesses are protruded inwardly from the inner periphery of the inner casing.

[72] The protruded recesses 22 of the inner casing 20 are for forming a degree of spaces

S2 by contacting a filter F with the inner casing 20 and for preventing the filter F from playing when the filter F is inserted and installed into the inner casing 20.

[73] That is, as shown in Fig. 11 being illustrated the inner casing 20 as plan cross- sectional view, it will be understood that the protruded recesses 22 are portions protruded inwardly from the inner periphery of the inner casing 20 such as in the described outer casing 10.

[74] On the one hand, as shown in Fig. 11 being illustrated the inner casing 20 as front cross-sectional view, firstly, an end of the inner casing 20 extends outwardly from a protruded step 23 along an outer periphery of the inner casing 20, has a rounded band fastener 24 of which end is formed in a form of circle. Such band fastener 24 of the inner casing 20 is contacted and banded with one end of the discharge side hopper 30 by the band 60, as later described.

[75] In the present invention, it will be understood that the protruded step 23 refers to both a portion formed by the outer periphery of the inner casing 20 and a protruded step formed by the inner periphery of the inner casing 20 and indicated by a same reference numeral.

[76] On the one hand, as shown in Fig. 10, the other end of the inner casing 10 is formed integrally with the cone shape of inner casing introduction hopper 21, as described above, and a step 21a is formed in both starting portions of a body portion of the inner casing 10 and the inner casing introduction hopper 21. The inner casing introduction hopper 21 extends outwardly from the step 21a.

[77] The step 21a also refers to a same point in inner and outer peripheries of the inner casing 20 and indicated by a same reference numeral. Such step 21a functions as a retainer for the filter when the filter F is inserted into the inner casing 20.

[78] The inner casing 10 having the above described structures is inserted into the outer casing 10 and then installed therein, as shown in Fig. 3.

[79] As shown in Fig. 3, certain sizes of spaces Sl are formed between the outer periphery of the inner casing 20 and the inner periphery of the outer casing 10. The spaces Sl are formed by contacting the plurality of protruded recesses 12 on the inner periphery of the outer casing 10 with the outer periphery of the inner casing 20. Accordingly, the spaces Sl function to prevent a high temperature of the exhaust gas, which passes through the filter F, from transferring to the outside, be certain of degree.

[80] Fig. 3 is a cross sectional view showing a state that the inner casing 20 is inserted into the outer casing 10. [81] The protruded recesses 12 formed longitudinally on the inner periphery of the outer casing 10 are contacted with the outer periphery of the inner casing 20 being inserted into the outer casing 10 to form the spaces Sl and to support the inner casing 10 for preventing the inner casing 10 from playing therein.

[82] Further, an end of the inner casing 20 is contacted with a retainer 33 contacting with an outer surface of the band fastener 24 of opened side into the same diameter, as later described.

[83] A plurality of filters F are inserted into the inner casing 20. In Fig. 3, there are shown the outer 10, the inner casing 20, and the filters F being inserted into the inner casing 20. As shown in Fig. 3, the outmost filters positioned both ends of the filters F are supported by both ends of the inner casing 20. The inner casing 20 supports the filter initially introduced into the step 21a of inner casing introduction hopper 21 connected to the rear end, i.e., right end in the drawings, of the inner casing 10. And, in the other end, i.e. left end in the drawings, of inner casing 10, there is provided in a retainer 25 for the plurality of filters F at from front and rear being inserted into the inner casing from front and rear respectively.

[84] Fig. 4 shows a modification of configure of Fig. 3.

[85] There is modified and performed the portion contacted with both the discharge side hopper 30 and the inner casing 20 and is banded by the band 60.

[86] For example, a bent portion 30a is bent vertically from the discharge side hopper 30 and then extends horizontally and rounded to form a round portion 30b. The end of the inner casing 20 is bent into "an invert U-shape" to form a band fastener 24' and then extends horizontally to closely contact with a bottom side of the round portion 30b of the discharge side hopper 30, so that end of discharge side hopper 30 is form the space S 1 with the outer periphery of the inner casing 20. The end of the discharge side hopper 30 is bent with a rear outer periphery of the band fastener 24' of the inner casing 20, and then the end of the inner casing 20 is welded to the outer casing 20. The round portion 30b and the band fastener 24' are covered by a cover 66 and are band by the band 60 to couple the discharge side hopper 30 with the inner casing 20.

[87] The discharge side hopper 30 has a cone shape, and a left end of discharge side hopper 30 in Fig. 3 is contacted with a gasket 26 contacting with an outer surface the retainer 25 for fixing the filters. The other end of the discharge side hopper 30 has a diameter reduced gradually outwardly, and is welded to discharge side flange 40 with a welding, etc.

[88] The discharge side hopper 30 has a cone shape, and the retainer 25 finishes the final filter F. the outer surface of the retainer 25 is flushed with the step 23 of the inner casing 20. Therefore, when the gasket 26 is fitted, the contacted state of the retainer 25 and the step 23 can be maintained. [89] Herein, a flange 31 is preferably formed at an outer surface of the end of the discharge side hopper 30 being contacted with the gasket 26. A portion 32 having a same diameter extends horizontally from the flange 31, and thereafter, the diameter thereof is reduced gradually and is welded to one end of the discharge side flange 40. an outer surface of portion 32 extending horizontally from the flange 31 contacts with an inner surface of a retainer 33 described lately and is closely contacted to the flange 31 (see Fig. 3).

[90] The discharge side flange 40 is fixed to the end, i.e. gradually reduced portion of the discharge side hopper 30 by welding, etc, the introduction side flange 50 is fixed to the gradually reduced portion of the inner casing introduction hopper 21, by welding, etc.

[91] The band 60 is used to cover and band the portion 32 of the discharge side hopper 30, the retainer 33 positioned at the flange 31, and the band fastener 24 of the inner casing 20, as shown in Figs. 1 and 2.

[92] As shown in Fig. 2, the band 60 is formed by bending a strip member 61 in an arc shape, and both ends of the band are rounded portions 62 having holes 63 into which a fastener 65 having threaded portion formed at outer surface is inserted and engaged with the urging members 64 being inserted into the holes, for urging the band.

[93] In addition, the cover 66 is formed integrally with the bottom portion of the strip member 61 and covers the retainer 33 and the band fastener 24 of the inner casing 20.

[94] Using the present invention having the above described configuration, the work filtering the exhaust gas is performed as follows: Firstly, the inner casing 20 is inserted into the outer casing 10, thereafter, there are welded and fixed the inner surface of the gradually reduced diameter portion of the outer casing introduction hopper 11 and the outer surface of the gradually reduced diameter portion of the inner casing introduction hopper 21 of the inner casing 20. The rounded band fastener 24 is formed at the other end of the inner casing 20 to support the other end of the outer casing 10.

[95] Between the outer casing 10 and the inner casing 10 having such engagement state, the spaces Sl are formed by the plurality of protruded recesses 12 which are longitudinally formed in an inner periphery of the outer casing 10 and protruded inwardly from the inner periphery of the outer casing. The spaces Sl function to prevent a high temperature of the exhaust gas emitted from the vehicle's engine, which passes through the filter F, from transferring to the outside, be certain of degree and also function to absorb an impact force from an outside.

[96] If the outer casing 10 and the inner casing 20 are engaged with each other as above described, the filters are in turn inserted into the inner casing 10. One end of the initially inserted filter (the right filter in the drawings) is contacted and supported with the step 21a which functions as a retainer of the inner casing introduction hopper 21 of the inner casing 20. The finally inserted filter (the left filter in the drawings) is fixed by contacting with the filter fixing retainer 25 contacted with the gasket 26.

[97] As the filter fixing retainer 25 and the gasket 26 are inserted into the inner casing, the work for fixing the filters F is completed, the one side of the discharge side hopper 30, i.e. the flange 31 and the rounded band fastener 24 of the inner casing 20 are contacted with each other. Thereafter, the retainer 33 is provided to surround the horizontal extending portion 32 of the discharge side hopper 30. And then, the cover 66 of the band 60 covers the discharge side hopper 30 and the rounded band fastener 24 of the inner casing 20. In this state, the fastener 65 is inserted and engaged into the urging members 64 being inserted into the holes 63 formed at the rounded portions, for urging the band.

[98] Further, in order for exchanging, cleaning, and maintaining the filter F of the exhaust gas filtering system, without individually separation of the band being fastened front and rear as in a prior art, the filters F are removed from the inner casing by releasing only one band 60 and thus a maintenance of the exhaust gas filtering system can be very easily.

[99] Further, by the nature of the exhaust gas filtering system connected to the vehicle's engine and piped to a muffler disposed at a rear of the vehicle, for exchanging, cleaning, and maintaining the filter F of the exhaust gas filtering system, the entire exhaust gas filtering system should be separated from the vehicle in a prior art, but in accordance with the present invention, as the band 60 of one side is released, the exhaust manifold connected to the muffler and the piping are separated from each other, thus the working time can be substantially shortened.

[100]

[101] SECOND EMBODIMENT

[102] A second embodiment of the present invention provides an exhaust gas filtering system for vehicles, the exhaust gas filtering system comprising an outer casing having a first outer casing connected to a piping line piped to the muffler and a second outer casing connected to a piping line from the engine by separating any central portion of the outer casing for forming the exhaust gas filtering system, a contacted portion between the first and the second outer casings is banded, a flange of any one of the first and the second outer casings is offset such that the offset outer casing is rotated and then banded, so that the exhaust gas filtering system can be compatible independently of the type of vehicles.

[103] To this end, as shown in Figs. 12 to 21, the second embodiment of the present invention provides the exhaust gas filtering system which has a more easer banding structure and filter exchanging work and installation compatibility independently of the type of vehicles. The exhaust gas filtering system comprises a first and a second outer casings 100, 100', a first and a second inner casings 200, 200' inserted into the first and the second outer casings 100, 100', respectively, a band 400 for coupling central portions of the first and the second outer casings 100, 100' and the first and the second inner casings 200, 200', and an introduction side hopper, a discharge side hopper, an inner casing introduction hopper, and an inner casing discharge hopper being offset in the central points of the first and the second outer casings 100, 100' and the first and the second inner casings 200, 200', respectively.

[104] The outer casings 100, 100' include the first and the second outer casings 100, 100', are contacted with each other at the central portions and are connected integrally with the introduction side hopper 120 and the discharge side hopper 120 having a gradually reduced diameter, at the other end thereof.

[105] That is, as shown in Figs. 11 to 13, the first outer casing 100 is shown at right side in drawings and the second outer casing 100 is shown at left side. The introduction side hopper 120 of the first outer casing is connected to a piping line from the engine (not shown) of the vehicles, and the discharge side hopper 120' of the second outer casing 100 is connected to a discharging line from the muffler (not shown) to which a filtered gas is directed.

[106] A plurality of protruded recesses 110, 110' are longitudinally and inwardly formed on outer peripheries of the first and the second outer casings 100, 100', by an equal angle.

[107] The protruded recesses 110, 110' are contacted with outer peripheries of the first and the second inner casings 200, 200', described later to spaces Sl between the first and the second outer casings 100, 100' and the first and the second inner casings 200, 200'.

[108] On the one hand, the introduction side hopper 120 and the discharge side hopper

120', which have a gradually reduced diameter, respectively, for connecting the piping line from the engine with the discharging line from the muffler are offset from the center line of the first and the second outer casings 100, 100', respectively.

[109] The inner casings 200, 200' include the first and the second inner casings 200, 200' and are inserted into the first and the second outer casings 100, 100', respectively. As shown in Figs. 15 and 16, the contacting portion of the inner casings 200, 200' have band fasteners 210, 210' processed roundly at one end thereof and are contacted with each other.

[110] As the above described, the first and the second inner casings 200, 200' can be fastened by the band 400 covering and surrounding the band fasteners 210, 210' contacting with each other.

[I l l] As shown in Fig. 18, the band 400 is formed by bending a strip member 410 in an arc shape, and both ends of the band are rounded portions 410 having holes 421 into which a fastener 430 having threaded portion formed at outer surface is inserted and engaged with the urging members 440 being inserted into the holes, for urging the band 400.

[112] Further, a cover 630 is formed integrally at a bottom portion of the strip member 410 and covers the band fasteners 210, 210' of inner casings 200, 200'.

[113] Herein, as shown in Fig. 15, the band fasteners 210, 210' are protruded upwardly from the end portions of the first and the second outer casings 100, 100' for contacting each of ends of the first and the second outer casings 100, 100'.

[114] On the one hand, an inner casing introduction hopper 220 and an inner casing discharging hopper 220' are formed by gradually reducing the other end of the first and the second inner casings 200, 200', respectively.

[115] The inner casing introduction hopper 220 of the first inner casings 200 and the inner casing discharging hopper 220' of the second inner casings 200' are offset from the center line of the first and the second inner casings 200, 200', respectively.

[116] Further, the inner casing introduction hopper 220 is welded to introduction side hopper 120 of the first outer casing 100 and the inner casing discharging hopper 220' of the second inner casings 200' is inserted into an inner portion of the discharge side hopper 120' of the second outer casing 100', and an end of the inner casing discharging hopper 220' is welded to the inner portion of the discharge side hopper.

[117] Accordingly, the first and the second inner casings 200, 200' are inserted into the first and the second outer casings 100, 100' and are fixed and maintained therein. Thus, in end portions contacted with each other, as above described, ends of the first and the second outer casings 100, 100' become contacting the rounded band fasteners 210, 210' of the first and the second inner casings 200, 200' and the other end of the rounded band fasteners 210, 210', are line-contacted.

[118] The separated first and the second inner and outer casings 100, 100', 200, 200', respectively, can be coupled together by the band 400 covering the line-contacted rounded band fasteners 210, 210'.

[119] Further, there are longitudinally formed a plurality of protruded recesses 201, 201' recessed from the outer periphery of the first and the second inner casings 200, 200', and protruded the inner periphery thereof.

[120] Therefore, the plurality of protruded recesses 110, 110' longitudinally and inwardly formed on outer peripheries of the first and the second outer casings 100, 100' are contacted with the outer periphery of the first and the second inner casings 200, 200' to form spaces Sl between the outer casings 100, 100',and the inner casings 200, 200'.

[121] Also, the plurality of protruded recesses 201, 201' formed longitudinally on the inner periphery of the inner casings 200, 200' are contacted with filters F inserted into the first and the second inner casings 200, 200' to form spaces S2 between the first and the second inner casings 200, 200', and the filter F.

[122] Accordingly, by the spaces Sl, S2, a high temperature of the exhaust gas, which passes through the filter F, can be prevented from transferring to the outside, while the filter F is prevented from damaging and varying by an outer shock. [123] Fig. 19 is a cross-sectional view for showing the coupling state between of the first and the second outer casings 100, 100' and the first and the second inner casings 200, 200'.

[124] As shown in Fig. 19, the filters F are inserted into the first and the second inner casings 200, 200', respectively, and spaces S exist between the filters.

[125] To this end, steps 221, 221' are formed at portions of the inner casing introduction hopper 220 and the inner casing discharging hopper 220' of the first and the second inner casings 200, 200', which the portions are connected to the body. Also, second steps 221a, 221a are formed at the opposing ends.

[126] The steps 221, 221' function as retainers for supporting one side of the filters F and other sides of the first steps, i.e. central portions in the drawings are contacted with the band fasteners 210, 210', a spacer 300 is inserted into an inner periphery of the band fasteners 210, 210' to be contacted with the second steps 221a, 221a'.

[127] The spacer 300 prevents the band fasteners 210, 210' of the inner casings 200, 200' from being crushed when the band fasteners 210, 210' are banded by the band 400, performs a function of core member to provide a rigidity to the system, supports the other end of the filters F as above described, and promotes an insurance of the spaces S between the filters F.

[128] Further, as shown in Fig. 20, gaskets 212, 212' are contacted with both sides of the spacer 300, and retainers 211, 211' provided for fixing the filters are contacted with the gaskets 212, 212', and support the filters F.

[129] Therefore, the filters F are supported within the retainers 211, 211' and the steps 221, 221' of the inner casing introduction hopper 220 and the inner casing discharging hopper 220', Sound absorbing materials F-I are provided at the outer surface of the filters F and are surrounded by filter casings F-2.

[130] The filter casings F-2 are formed with bending portions F- 3 at one end thereof to support one ends of the filters F and the sound absorbing materials F-I, as shown at the drawings.

[131] In such configuration in which the exhaust gas filtering system in accordance with the present invention is connected between the piping line from the engine of the vehicles and the piping line connected to the muffler, firstly, the filters F are fixed within the first and the second inner casings 200, 200' by the gaskets 212, 212' and the filter fixing retainers 211, 211'.

[132] And then, the first and the second inner casings 200, 200' are inserted into the first and the second outer casings 100, 100', thereafter, the spacer 300 is provided at the contacted portion between the inner and the outer casings to insure the spaces S between the first inner and the first outer casings 100, 200 and between the second inner and the second outer casings 100', 200', thereby to be banded the separated portions between the first and the second outer casings 100, 100', using the band 400.

[133] At this time, because a position of the piping line from the engine of the vehicles and a position of the piping line connected to the muffler are different from each other depending on types of vehicles, the first and the second outer casings 100, 100' can be rotated to be consisted with each of the positions of the piping lines according to the conditions of the vehicle's piping lines to be installed.

[134] With the adjustment work for the positions of the piping lines, the introduction side hopper 120 and the discharge side hopper 120' of the first and the second outer casings 100, 100' are connected with each other in a position, in which the piping line from the engine of the vehicles and the piping line connected to the muffler are coincided with each other, by flanges, etc.

[135] And then, by banding it with the band 400, the work for coupling the exhaust gas filtering system in a variety of vehicles can be completed.

[136] Further, when the filters used at the exhaust gas filtering system in accordance with the present invention are removed for exchanging, cleaning, etc, firstly, the exhaust gas filtering system is separated from each of the piping lines, secondly, the band 400 is separated from the central portion to remove the filters from the first and the second inner casings 200, 200', thereby to perform the exchanging the cleaning of the filters. Accordingly, the inconvenience due to bands at front and rear portions in the prior art can be removed.

[137]

Industrial Applicability

[138] As described above, the compact module using the polymer metal composite according to the present invention can be applied to a small camera such as a camera provided on a cellular phone to control precisely a driving displacement of a driving lens assembly.

[139] Although the present invention has been described with reference to two exemplary embodiments, the description is illustrative of the invention and is not to be construed as limiting the invention. Various modifications and variations may occur to those skilled in the art, without departing from the spirit and scope of the invention, as defined by the appended claims.

Claims

[1] An exhaust gas filtering system for vehicles, comprising: an outer casing (10) having a plurality of protruded recesses (12) longitudinally formed in an inner periphery of the outer casing by an equal angle, one end of outer casing being opened into a same diameter and the other end thereof being formed integrally with an outer casing introduction hopper (11) in the form of a gradually reduced diameter; an inner casing (20) having longitudinally formed in an inner periphery of the outer casing (10) by an equal angle, and an end of the inner casing extending outwardly from a protruded step (23) and having a rounded band fastener (24) to surround one end edge of the outer casing, the other end thereof being formed with an inner casing introduction hopper (21) having a cone shape in the form of gradually reduced diameter from a step (21a), the inner casing (20) being positioned within the outer casing (10) and into which a plurality of filters F are inserted; a discharge side hopper (30) having a flange (31) contacted with the rounded band fastener (24) of the inner casing (20) and having a portion (32) having a same diameter extends horizontally from the flange (31) and then formed with a cone shape; a discharge side flange (40) connected to an end of the discharge side hopper

(30); an introduction side flange (50) being coupled into the inner casing introduction hopper (21) of the inner casing (20); and a band (60) for covering and banding the rounded band fastener (24) of the inner casing (20) and the flange (31) of the discharge side hopper (30).

[2] The exhaust gas filtering system according to claim 1, wherein spaces Sl, S2 are formed among the plurality of protruded recesses of the outer casing, the inner periphery of the inner casing (20), and the inner casing introduction hopper (21) of the inner casing (20) being inserted into the outer casing introduction hopper (11).

[3] The exhaust gas filtering system according to claim 1, further comprising a retainer (25) for fixing sides of a final filter F of the plurality of filters F being inserted into the inner casing (20); and a gasket (26) being contacted with an outer surface of the retainer (25).

[4] The exhaust gas filtering system according to claim 1, further comprising a retainer (33) for surrounding a horizontal extending portion (32) of the discharge side hopper (30) and being supported by the flange (31).

[5] The exhaust gas filtering system according to claim 1, wherein the band (60) is formed by a strip member (61) and both ends of the band are rounded portions (62) having holes (63) into which a fastener (65) is inserted and engaged with urging members (64) being inserted into the holes, for urging the band, and the band has a cover (66) formed integrally at a bottom of the strip member (61).

[6] The exhaust gas filtering system according to claim 1, wherein a bent portion

(30a) is bent vertically from the discharge side hopper (30) and then extends horizontally and rounded to form a round portion (30b), the end of the inner casing (20) is bent into "an invert U-shape" to form a band fastener (24') and then extends horizontally to closely contact with a bottom side of the round portion (30b) of the discharge side hopper (30), so that end of discharge side hopper (30) is form the space Sl with the outer periphery of the inner casing (20), the end of the discharge side hopper (30) is bent with a rear outer periphery of the band fastener (24') of the inner casing (20), and then the end of the inner casing (20) is welded to the outer casing (10), the round portion (30b) and the band fastener (24') are covered by a cover (66) and are band by the band (60) to couple the discharge side hopper (30) with the inner casing (20).

[7] An exhaust gas filtering system for vehicles having a variable position structure, comprising: a first and the second outer casings (100, 100') having a plurality of protruded recesses (110, 110') being longitudinally formed on outer peripheries thereof by an equal angle, an introduction side hopper (120), and an discharge side hopper (120'), other ends of the hoppers being contacted with each other; a first and a second inner casings (200, 200') having a plurality of recesses protruded from an inner periphery thereof by an equal angle, an introduction side hopper, and a discharge side hopper, and other ends of the hoppers being formed as band fasteners with a rounded one end which the band fasteners extend from the hoppers, respectively, and being inserted into the first and the second outer casings (100, 100'), respectively; a spacer (300) for forming spaces S between filters within the band fasteners contacting the inner casings when the filters are inserted into the first and the second inner casings (200, 200'); a band (400) for surrounding and covering the band fasteners at ends of the first and the second inner casings (200, 200'); and a introduction side flange and a discharge side flange being welded to end inner peripheries of the introduction side hopper and the discharge side hopper, respectively; whereby a piping line from an engine and a piping line from a muffler are connected with each other. [8] The exhaust gas filtering system according to claim 7, wherein the introduction side hopper (120) and the discharge side hopper (120') are offset in the central points of the first and the second outer casings (100, 100') and the first and the second inner casings (200, 200'), respectively.

[9] The exhaust gas filtering system according to claim 7, wherein steps (221, 221') are formed at portions of the inner casing introduction hopper (220) and the inner casing discharging hopper (220') of the first and the second inner casings (200, 200'), which the portions are connected to the body and a spacer (230) is inserted into an inner periphery of the band fasteners (210, 210') being formed and contacted with each other at opposite side of the first and the second inner casings (200, 200'), so that spaces S exist between the filters F.

[10] The exhaust gas filtering system according to claim 7, further a filter casing F-2 for covering an outer surface and each of ends of the filters.