• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The member (10) comprises: at least one exhaust gas purification block (14), an envelope (12), having an inner surface (13) surrounding the purification block (14), delimiting a circulation channel exhaust gas, in which is housed the purification unit (14), and at least one element (16) for holding the purification unit (14) interposed between the inner surface (13) of the envelope (12). ) and a side wall (15) of the purification block (14). The inner surface (13) of the envelope (12) has at least one portion (18) projecting towards the purification block (14), the holding element (16) being interposed between the said lateral wall (15) of the purification block (14) and said projecting portion (18).
    公开号:FR3036439A1
    申请号:FR1554644
    申请日:2015-05-22
    公开日:2016-11-25
    发明作者:Gerard Lerdung；Gilles Carnoy；Cyrille Cantele
    申请人:Faurecia Systemes dEchappement SAS；
    IPC主号:
    专利说明:

    [0001] The present invention relates to an exhaust gas purification unit, the external dimensions of which are standardized. A purification member is intended to be inserted into an exhaust line, for example a marine vehicle, a motor vehicle, including a truck, a specialized vehicle, including a construction vehicle, or a stationary engine, in particular a motor of pollution control station of electric thermal power station. The purification member comprises in particular an envelope defining an exhaust gas circulation channel and an exhaust gas purification unit housed in the envelope. The purification block is for example a particulate filter or a catalytic purification member. More particularly, a particulate filter is made of a filtration material formed by a monolithic structure of ceramic or silicon carbide having a porosity sufficient to allow the passage of exhaust gas, but whose pore diameter is small enough to ensure retention of particles, including soot particles, on the upstream face of the filter.
    [0002] The purification member also comprises holding elements of the purification block, interposed between the envelope and this purification unit. It should be noted that the dimensions of the purification block are difficult to control, so that these dimensions can vary from one purification unit to another.
    [0003] On the other hand, for a good insertion of the purification member in the exhaust line, the outer dimensions of the envelope must be constant from one purification member to another. Thus, it is necessary to provide holding elements of various dimensions, to adapt the dimensions of the holding elements according to the dimensions of the purification block, which implies a complex logistics. Moreover, such holding elements are generally relatively expensive. Thus, the cost of a conventional purification device can be relatively high. The object of the invention is in particular to remedy this disadvantage by providing a purification element having a reduced cost.
    [0004] For this purpose, the subject of the invention is in particular an exhaust gas purifying unit, comprising: at least one exhaust gas purification unit; an envelope having an inner surface surrounding the exhaust block; purification, delimiting an exhaust gas circulation channel, in which is housed the purification block, and 5 - at least one holding element of the purification block, interposed between the inner surface of the envelope and a side wall of the purification unit, characterized in that the inner surface of the envelope comprises at least one portion projecting towards the purification unit, the holding element being interposed between said side wall of the purification unit and said projecting part.
    [0005] In accordance with the invention, the differences in size between various purification blocks are caught by the projecting portions on the inner surface of the casing. Such protruding portions can be made simply, economically and accurately, depending on the dimensions of the purification block and the corresponding holding elements. For example, in a preferred embodiment, the protruding portions are made by stamping. Thus, the invention does not require adapting the holding elements to the purification unit, which substantially reduces the manufacturing cost, generally by dividing by three.
    [0006] A purification device according to the invention may further comprise one or more of the following characteristics, taken alone or in any technically feasible combination. - Each projecting part is a stamped. The purification block and the envelope have cross sections of similar general shapes, in particular polygonal shapes, preferably tetrahedral shapes, for example square, rectangular or trapezoidal shapes. - Each protruding portion extends projecting to a height less than 3.5 mm. The envelope comprises stiffening ribs, preferably arranged on an outer surface of this envelope. - The envelope has two half-envelopes connected together. The half-shells are covered, at their connection, by connecting elements, for example by welding. The inner surface of the envelope has a plurality of walls separated by wedges, each wall having at least one projecting portion. The inner surface of the envelope has at least two protruding portions, the protruding portions projecting over different heights. The invention also relates to a method for manufacturing a purification member as defined above, characterized in that it comprises: a step of measuring the dimensions of the purification block, and a step of producing each part protruding, each on a respective height dependent on the measured dimensions of the purification block. A manufacturing method according to the invention may comprise one or the other of the following characteristics, taken alone or in combination. The manufacturing method further includes a step of weighing each holding member, the height of each protruding portion also being each dependent on the respective measured mass of each holding member. The manufacturing process comprises a step of assembling each holding element on the purification block, in particular by gluing, followed by a step of assembling the envelope around the purification block, so that each element of holding is pinched between the purification block and a corresponding protruding part. The invention will be better understood on reading the description which will follow, given solely by way of example and with reference to the appended figures, among which: FIG. 1 is an exploded perspective view of an organ purification according to an exemplary embodiment of the invention; FIG. 2 is a perspective view of a half-envelope of the purification member of FIG. 1; Figure 3 is a cross sectional view of the purifying member of Figure 1, exploded; Figure 4 is a cross-sectional view of the purification member of Figure 1 when assembled; - Figures 5 to 7 are views similar to Figure 4, showing three respective variants of envelopes equipping the purification member; FIG. 8 schematically represents the steps of a process for manufacturing the purification member of FIG. 1. FIG. 1 shows an exhaust gas purification member 10 intended to be inserted into a marine vehicle exhaust line.
    [0007] The purifying member 10 comprises a casing 12, generally metallic, formed in this embodiment by two half-envelopes 12A and 12B, intended to be assembled together. In this example, each half-shell 12A, 12B has a generally elongate shape in a longitudinal direction X, and an L-shaped section in a transverse plane perpendicular to the longitudinal direction X. Each half-shell 12A, 12B is therefore formed by two walls, each extending perpendicularly to the longitudinal direction X, between a free longitudinal edge and an edge connected to the other wall. The half-shells 12A, 12B are assembled by connecting each free longitudinal edge 10 of a wall of one of the half-shells to a respective one of the free longitudinal edges of one wall of the other of the half-shells. The envelope 12 has an inner surface 13 delimiting an exhaust gas circulation channel. The casing 12 is intended to be connected upstream of the exhaust line to a diverging cone defining an exhaust gas inlet, and downstream to a convergent cone defining an exhaust gas outlet. . The inlet is connected to a manifold of the exhaust line, which captures the exhaust gases leaving the combustion chambers of the engine. The outlet is connected to a cannula through which the exhaust gases are released into the atmosphere after purification. Upstream and downstream are meant here relative to the direction of normal exhaust gas circulation. The purification member 10 furthermore comprises a block 14 for purifying the exhaust gases, generally a particle filter or a catalytic purification element. A catalytic purification member is generally formed by a gas-permeable structure, for example, coated with catalytic metals promoting the oxidation of combustion gases and / or the reduction of nitrogen oxides. A particulate filter is made of a filtration material formed by a monolithic ceramic or silicon carbide structure having a porosity sufficient to allow the passage of the exhaust gas. As is known per se, the diameter of the pores is chosen small enough to ensure retention of the particles, and especially soot particles, on the upstream face of the filter. The particulate filter may also be formed by a cartridge filter or a sintered metal filter. In the example described, the purification unit 14 has a cross section of generally square shape. Alternatively, the purification block 12 could have a cross-section of any polygonal shape, preferably tetrahedral, for example rectangular or trapezoidal.
    [0008] The purification block 14, having reduced transverse dimensions relative to those of the casing 12, is housed in said circulation channel. The casing 12 thus internally defines an exhaust gas flow passage from the inlet to the outlet, through the purification block 14, the exhaust gases being purified by passing through this purification block. 14. The purification unit 14 is delimited by lateral walls 15 facing the envelope 12 and delimiting a peripheral space with the inner surface 13 of the envelope 12. The envelope 12 has a cross-section of a shape similar to that of the 10 purification block 14. Thus, the side walls 15 of the purification unit 14 are substantially parallel to the inner surface 13 of the casing 12. The purification member 10 further comprises holding elements 16, intended to be interposed between the purification unit 14 and the envelope 12. More particularly, the holding elements 16 are arranged in said peripheral space, each element of maintenance 16 being interposed between the inner surface 13 of the casing 12 and a corresponding side wall 15 of the purification unit 14. More particularly, at least one set of holding elements 16 is arranged to frame the purification block 14, as this is particularly shown in Figure 3. Advantageously, a plurality of such sets of holding elements 16 is distributed over the length of the purification block 14. Each holding element 16 is for example formed by a metal knit or a tablecloth . In the case of a sheet, it is in particular made of an intumescent material, or alternatively a non-intumescent material. Each holding member 16 bears outwardly on the casing 12 and bears inwardly on the purification block 14. It thus exerts a transverse pressure on the purification block 14. The holding elements 16 contribute to keeping the purification unit 14 in position, when it is subjected to a longitudinal force parallel to the longitudinal direction X, and / or also when it is subjected to a transverse force perpendicular to the longitudinal direction X When the purification unit 14 is subjected to a longitudinal force, the friction between this purification unit 14 and the holding elements 16, and between the holding elements 16 and the envelope 12, are such that the movement of the block of purification 14 with respect to the envelope 12 is very limited. To achieve this effect, it is necessary to mount the holding members 16 in the peripheral space with an adequate mounting density. The density of the mounting element 16 is the density of the holding element 16 at ambient temperature.
    [0009] This density should not be too low, because the purification unit 14 would then be poorly maintained in position relative to the casing 12 under the effect of a longitudinal bias, particularly at high temperature due to the expansion. differential between the envelope 12 and the purification unit 14 which leads to an increase in the thickness of the peripheral space. It should be noted that such a differential expansion is generally due to the fact that the envelope 12 expands more than the purification unit 14. The mounting density must also not be too high, to avoid damaging the block purification 14, especially in the long term.
    [0010] In order to obtain an adequate mounting density, the inner surface 13 of the casing 12 comprises at least one portion 18 projecting towards the exhaust gas circulation channel, thus towards the purification block 14, so that each holding element 16 is interposed between the corresponding side wall 15 of the purification unit 14 and a protruding part 18 arranged facing this side wall 15.
    [0011] These protruding parts 18 make it possible to control the mounting density, without modifying the overall dimensions of the envelope 12. Thus, whatever the dimensions of the purification unit 14, the envelope 12 has standard external dimensions. Each protruding portion 18 is, for example, stamped, achievable in a simple, economical and accurate manner by a conventional stamping process. Each protruding portion protrudes over a predetermined height, depending on the dimensions of the purification block 14 and the holding members 16. In view of the dimensional variations of one purification block to another, said predefined height is generally less than 3.5 mm, for example about 1.5 mm. It should be noted that each wall of the envelope 12 has at least one protruding portion 18. More particularly, two opposite walls, one facing the other, of the envelope 12 are generally both provided with parts 18, the heights of these protruding portions 18 being determined to allow the setting of the purification block 14 to be wedged together. These protruding portions 18 do not necessarily have identical heights. Furthermore, the projecting portions 18 formed on two adjacent walls of the casing 12, generally extend to different heights. Advantageously, as shown in FIG. 2, the casing 12 preferably comprises stiffening ribs 20, in particular arranged on an outer surface 21 of this casing 12. In the example described, stiffening ribs 20 are arranged along the longitudinal edges of each half-envelope 12A, 12B, and stiffening ribs 20 are arranged, for example by forming a cross, between two protruding portions 18 adjacent in the longitudinal direction X on the same wall of the envelope 12.
    [0012] As indicated above, the envelope 12 is formed by two half-envelopes 12A, 12B, assembled together, for example by welding. In order to reinforce the tightness at the connection between the half-shells 12A, 12B, connecting elements 22 are preferably arranged by covering this connection, and connected to the half-shells 12A, 12B, for example by welding. Each connecting element 22 has, for example, the shape of an L-shaped strip for covering a corner of the envelope, and more particularly for covering the longitudinal edges of the half-envelopes 12A, 12B. It will be noted that the shape of the envelope 12 described above is only a non-limiting example, and that other shapes can be envisaged.
    [0013] In particular, according to a first alternative embodiment, shown in FIG. 5, the half-shells 12A and 12B do not have L-shaped sections, but U-shaped sections. In this case, to improve the seal, each half-shell 12A, 12B has a longitudinal overlap flange 24A, 24B partially overlapping the corresponding longitudinal edge of the other half-shell.
    [0014] According to a second alternative embodiment, shown in FIG. 6, one of the half-shells 12A or 12B comprises two longitudinal overlapping edges, each covering a respective one of the longitudinal edges of the other half-sheath. According to a third alternative embodiment, shown in FIG. 7, the envelope 12 is formed in a single part enveloping the block 14 and the holding elements 16. In this case, this envelope 12 comprises a longitudinal rim 26 covering an opposite longitudinal edge. Other embodiments may also be provided. For example, there can be provided a single-piece envelope 12 enclosing the block 14, having two longitudinal edges assembled at a corner, and covered with a connecting element 22 in the same way as in the variant of FIG. A method of manufacturing the purification member 10 will now be described. This manufacturing method first comprises a step 100 for measuring the dimensions of the purification unit 14. Advantageously, the method further comprises a step 110 of weighing each holding element 16.
    [0015] The method then comprises a step 120 for producing each projecting portion 18, over a height depending in particular on the measured dimensions of the purification block 14. This height advantageously also depends on the mass measured for each holding element 16.
    [0016] Thus, a height of the protruding portions 18 is ensured to obtain an optimal mounting density. The person skilled in the art will easily be able to choose the height of the protruding portions 18 as a function of the dimensions of the purification block 14 and the masses of the holding elements 16. The method further comprises a step 130 for assembling each holding element 10 16 on the purification unit 14, in particular by gluing. Advantageously, each holding member 16 also has glue on the face facing the envelope. The method then comprises a step 140 of assembling the envelope 12 around the purification block 14, so that each holding member 16 is pinched between the purification unit 14 and a corresponding projecting portion 18. This assembly step 140 is for example made by closing the envelope 12 directly around the purification unit 14. In a variant, the envelope 12 is assembled separately, the purification block 14 provided with the holding elements 16 being then entered in force in the gas circulation channel defined by the envelope 12. Note that the invention is not limited to the embodiment described above, but could have various variants. For example, there can be provided a purification member comprising a plurality of purification blocks assembled in rows and / or layers, so as to form a purification element consisting of several blocks. In this case, the realization of the purification member is similar to that described above, treating said purification element in the same manner as the purification block 14 described above. It will also be noted that the purification device according to the invention could be used in a different context than a maritime vehicle, for example in a motor vehicle.
    权利要求:
    Claims (12)
    [0001]
    REVENDICATIONS1. Exhaust gas purifying member (10), comprising: - at least one exhaust purification block (14), - an envelope (12) having an inner surface (13) surrounding the purification block ( 14), delimiting an exhaust gas circulation channel, in which the purification unit (14) is housed, and - at least one element (16) for holding the purification unit (14) interposed between the inner surface (13) of the casing (12) and a side wall (15) of the purification unit (14), characterized in that the inner surface (13) of the casing (12) comprises at least one part (18) protruding toward the purification block (14), the holding member (16) being interposed between said side wall (15) of the purification block (14) and said projecting portion (18).
    [0002]
    The purifying member (10) of claim 1 wherein each protruding portion (18) is a stamp.
    [0003]
    3. Purification member (10) according to claim 1 or 2, wherein the purification block (14) and the envelope (12) have cross sections of similar general shapes, including polygonal shapes, preferably tetrahedral, by square, rectangular or trapezoidal examples.
    [0004]
    The purification member (10) according to any one of the preceding claims, wherein each protruding portion (18) protrudes to a height of less than 3.5 mm.
    [0005]
    5. Purification member (10) according to any one of the preceding claims, wherein the casing (12) comprises stiffening ribs (20), preferably arranged on an outer surface (21) of the casing (12). .
    [0006]
    6. Purification member (10) according to any one of the preceding claims, wherein the envelope comprises two half-envelopes (12A, 12B) interconnected.
    [0007]
    7. Purification member (10) according to claim 6, wherein the half-envelopes (12A, 12B) are covered, on their connection, by connecting elements (22), for example by welding.
    [0008]
    8. Purification member (10) according to any preceding claim, wherein the inner surface (13) of the casing (12) has a plurality of walls separated by wedges, each wall having at least one projecting portion ( 18). 3036439 10
    [0009]
    The purification member (10) according to any one of the preceding claims, wherein the inner surface (13) of the envelope (12) has at least two protruding portions (18), those protruding portions (18). projecting on different heights. 5
    [0010]
    10. A method of manufacturing a purification member (10) according to any one of the preceding claims, characterized in that it comprises: - a step (100) for measuring the dimensions of the purification block (14), and a step (120) for producing each protruding portion (18), each at a respective height dependent on the measured dimensions of the purification block (14).
    [0011]
    The manufacturing method according to claim 10, further comprising a step (110) of weighing each holding member (16), the height of each protruding portion (18) also being each dependent on the respective measured mass of each holding member (16). 15
    [0012]
    12. The manufacturing method according to claim 10 or 11, comprising a step (130) of assembling each holding element (16) on the purification block (14), in particular by gluing, followed by a step (140). assembling the envelope (12) around the purification block (14) so that each holding member (16) is clamped between the purification block (14) and a corresponding projecting portion (18). 20
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    同族专利:
    公开号 | 公开日
    FR3036439B1|2018-11-23|
    US20160341098A1|2016-11-24|
    KR101817859B1|2018-01-11|
    DE102016109220A1|2016-11-24|
    CN106168154A|2016-11-30|
    CN106168154B|2018-11-23|
    KR20160137445A|2016-11-30|
    引用文献:
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    法律状态:
    2016-05-30| PLFP| Fee payment|Year of fee payment: 2 |
    2016-11-25| PLSC| Search report ready|Effective date: 20161125 |
    2017-05-25| PLFP| Fee payment|Year of fee payment: 3 |
    2018-05-25| PLFP| Fee payment|Year of fee payment: 4 |
    2019-05-27| PLFP| Fee payment|Year of fee payment: 5 |
    2020-05-25| PLFP| Fee payment|Year of fee payment: 6 |
    2021-04-21| PLFP| Fee payment|Year of fee payment: 7 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1554644|2015-05-22|
    FR1554644A|FR3036439B1|2015-05-22|2015-05-22|EXHAUST GAS PURIFYING DEVICE, WHOSE EXTERNAL DIMENSIONS ARE STANDARDIZED|FR1554644A| FR3036439B1|2015-05-22|2015-05-22|EXHAUST GAS PURIFYING DEVICE, WHOSE EXTERNAL DIMENSIONS ARE STANDARDIZED|
    DE102016109220.7A| DE102016109220A1|2015-05-22|2016-05-19|Exhaust gas purification element with standardized external dimensions|
    US15/158,703| US20160341098A1|2015-05-22|2016-05-19|Exhaust Gas Purification Member, the Outer Dimensions of Which are Standardized|
    CN201610344268.6A| CN106168154B|2015-05-22|2016-05-23|The exhaust gas purification component of outside dimensional standards|
    KR1020160062886A| KR101817859B1|2015-05-22|2016-05-23|Exhaust gas purification member, the outer dimensions of which are standardized|
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