JP6211859B2 - Intake duct for vehicle - Google Patents

Description

  The present invention relates to a vehicle intake duct having a function of reducing intake noise when external air is taken into an internal combustion engine of a vehicle.

  FIG. 17 shows an intake duct 1001 for a vehicle disclosed in Patent Document 1. In FIG. 17, the vehicle intake duct 1001 includes a flat plate-like porous material 1002 and a cylindrical duct body 1003. The porous material 1002 reduces intake noise, and is composed of a non-woven fabric molded into a flat plate shape by pressing without weaving fibers. A portion of the cylindrical duct main body 1003 where the porous material 1002 is installed is configured as a flat portion 1004 protruding outward in the diameter direction of the duct main body 1003. One opening 1005 is provided in the plane portion 1004. The opening 1005 penetrates into and out of the duct body 1003. Then, the porous material 1002 is joined to the flat portion 1004 from the outside of the duct main body 1003 by a rivet, an adhesive, or the like so as to cover the opening 1005. One end of the duct body 1003 constitutes an inlet 1006 for introducing outside air. The other end portion of the duct main body 1003 constitutes a connection portion 1007 to an air cleaner (not shown).

  However, although the vehicle intake duct 1001 shown in FIG. 17 has a structure that restricts the position of the porous material 1002 in the plane portion 1004 in a direction parallel to the flow of air flowing in the duct main body 1003, it is porous. When the material 1002 is joined to the flat surface portion 1004 with a rivet, a gap is likely to be generated between the porous material 1002 and the duct body 1003. When the gap is generated, extra hot air in the engine room is sucked into the engine room. There is a disadvantage that the performance is adversely affected.

  As shown in FIG. 18, the duct body 1003 is a curved pipe having a straight pipe portion 1008; 1009 and a curved pipe portion 1010 from the surrounding environment where the vehicle intake duct 1001 is installed, from the viewpoint of the intake noise reduction function. In some cases, the size of the porous material 1002 in the direction parallel to the flow of air flowing through the duct body 1003 from the suction port 1006 cannot be reduced. Therefore, the barrier 1011 protrudes outward from the curved pipe portion 1010 on the downstream side of the plane portion 1004 in the direction of intake air flow.

With respect to the vehicle intake duct 1001 in FIG. 18, as an analysis of ventilation resistance, the area when the vehicle intake duct 1001 is cut in a direction orthogonal to the flow of intake air = 3914 mm ² , and the flow rate to the vehicle intake duct 1001 is 10 m ³ / When air of min was flowed and the pressure loss in the vicinity of the outlet of the vehicle intake duct 1001 was determined by analysis, the pressure loss was −752 Pa. Moreover, the streamline display by the analysis of the ventilation resistance was the result shown in FIG.

  In FIG. 19, reference numeral 1012 denotes a streamline entering the duct main body 1003 from the straight pipe portion 1008, and reference numeral 1013 denotes a streamline entering the duct main body 1003 from the porous material 1002 and the opening 1005. Considering FIG. 19, the streamline 1014 at the barrier 1011 is disturbed, and the ventilation resistance is large.

  Further, it may be considered that the flat portion 1004 shown in FIG. 18 is removed and the opening 1005 formed between the straight pipe portion 1008 and the curved pipe portion 1010 is closed with a porous material 1002 formed into a flat plate shape shown in FIG. However, in this case, since the porous material 1002 is formed into a flat plate shape, a gap is easily generated between the porous material 1002 and the duct main body 1003. There is a drawback in that extra hot air is sucked in and the engine performance is adversely affected.

  On the other hand, although illustration is omitted, it is also conceivable to insert-mold a duct using a planar porous material as an insert member. However, in that case, it is difficult to place the porous material on the curved mold, and there is a drawback that the resin leaks from the portion where the porous material is installed on the mold.

  FIG. 20 shows a vehicle intake duct 1101 disclosed in Patent Document 2. In FIG. 20, the vehicle intake duct 1101 includes a hollow rectangular tube-shaped duct body 1102, two porous materials 1103, and two covers 1104. A plurality of openings 1105 and a plurality of holes 1106 are provided in the plane portion configured as the peripheral wall of the duct body 1102. The opening 1105 and the hole 1106 penetrate into and out of the duct body 1102. The porous material 1103 is made of a breathable nonwoven fabric, maltoprene, felt, asbestos sheet, glass wool, or the like so as to cover the plurality of openings 1105 from the outside of the duct body 1102. The cover 1104 holds the porous material 1103 from the outside, and is formed in a lattice shape provided with a plurality of through-hole portions 1107. A plurality of convex portions 1108 are provided in the lattice-shaped portion of the cover 1104, a convex portion 1110 is provided in one flange portion 1109 of the cover 1104, and a hole portion 1112 is provided in the other flange portion 1111 of the cover 1104. Is provided. Then, after the porous material 1103 is placed on the flat portion of the duct main body 1102 from the outside of the duct main body 1102 so as to cover the plurality of openings 1105, the pair of covers 1104 are formed from the outside of the duct main body 1102 to the porous material 1103. The protrusion 1110 is attached to the hole 1112, while the protrusion 1108 penetrates the porous material 1103 and is attached to the hole 1106 of the duct body 1102, thereby covering the opening 1105. The material 1103 is fixed to the outside of the flat portion of the duct body 1102 with a pair of covers 1104.

  However, since the vehicle intake duct 1101 shown in FIG. 20 is not configured to restrict the position of the porous material 1103 to the duct main body 1102, the duct main body 1102 can be covered with the duct main body 1102. There is a drawback that the position of the porous material 1103 varies. In addition, since the porous material 1103 is supported by sandwiching the flat plate-like portion of the cover 1104 between the duct body 1102 and the duct body 1102, a gap is easily generated between the porous material 1103 and the duct body 1102. If this gap occurs, there is a drawback that extra hot air in the engine room is sucked in and the engine performance is adversely affected.

  FIG. 21 shows a vehicle intake duct 1201 disclosed in Patent Document 3. In FIG. 21, the vehicle intake duct 1201 includes a hollow cylindrical duct main body 1202, one porous material 1203, and one cover 1204. The duct body 1202 includes a semicircular first half 1205 and a semicircular second half 1206. The first half 1205 and the second half 1206 are combined so as to form a hollow cylindrical shape, and the flange portion 1207 of the first half 1205 and the flange portion 1208 of the second half 1206 are joined together. Thus, the duct body 1202 is formed. The first half 1205 is provided with a circular opening 1209, a pair of ribs 1210, and two attachment holes 1211. The pair of ribs 1210 extends in the circumferential direction of the duct body 1202 and is connected to the flange portion 1207. A plurality of openings 1209 are arranged in the circumferential direction of the duct main body 1202 in a portion surrounded by the rib 1210 and the flange portion 1207 of the duct main body 1202. The porous material 1203 is a breathable member made of a nonwoven fabric or the like so as to cover the plurality of openings 1209 from the outside of the duct body 1202. The cover 1204 is sized to cover the porous material 1203 with a synthetic resin, and is formed in the same curved surface shape as the portion surrounded by the rib 1210 and the flange portion 1207 of the duct main body 1202. The cover 1204 is formed with a through hole portion 1212 connected to the opening 1209. Stop portions 1213 are provided at both ends of the cover 1204 in the circumferential direction of the duct main body 1202. The stop portion 1213 is provided with a hook portion 1214. Then, after the porous material 1203 is placed on the portion surrounded by the rib 1210 and the flange portion 1207 of the duct body 1202 so as to cover the plurality of openings 1209 from the outside of the duct body 1202, the cover 1204 is covered with the duct body. The cover member 1203 is covered with the porous material 1203 from the outside of the 1102, the stopper portion 1213 and the hook portion 1214 are inserted into the attachment hole portion 1211, and the hook portion 1214 is fixed to the attachment hole portion 1211. The porous material 1203 is sandwiched between the duct main body 1202 and the cover 1204 and supported.

  However, since the vehicle intake duct 1201 shown in FIG. 21 has a structure in which a plurality of openings 1209 are arranged in the circumferential direction of the duct body 1202, the porous material 1203, the cover 1204, the plurality of openings 1209, and the like. The portion consisting of the pair of ribs 1210 and the pair of attachment hole portions 1211 needs to be provided separately at a plurality of locations in the direction of the air flowing inside the duct body 1202, and the structure is complicated. In addition, since the stop portion 1213 has a structure provided at both ends of the cover 1204, the portion of the cover 1204 where the plurality of through-hole portions 1212 are provided tends to float to the outside in the diameter direction of the duct body 1202. When a portion provided with the plurality of through-hole portions 1212 in the cover 1204 is lifted to the outside in the diameter direction of the duct main body 1202, a portion surrounded by the rib 1210 and the flange portion 1207 of the duct main body 1202, the porous material 1203, It is easy to generate a gap between the two, and if this gap is generated, there is a disadvantage that extra hot air in the engine room is sucked and engine performance is adversely affected.

Japanese Patent No. 3517608 Japanese Utility Model Publication No. 6-10116 WO2011 / 155437

  The present invention has been made in view of the above-described background art, and in a vehicle intake duct having an intake noise reduction function for sandwiching and supporting a porous material between a cover and an installation portion of a duct body, the porous material and the installation are provided. It aims at attaching a porous material to an installation part so that a crevice may not be generated between parts.

The present invention includes a duct body formed hollow rectangular tube shape, and the installation portion of the curved shape provided to bend in the flow direction of air through the interior of the duct body on the peripheral wall portion of the duct body, the and the installation section which is formed in the opening so as to penetrate into and out of the duct body, and a porous material wherein is arranged in the installation section as from the outside of the duct body to cover the opening, outside of the duct body a common matters that it is a vehicle air intake duct example Bei and a cover having a through hole that allows the air flow to the opening from, the partition wall in the installation section protrudes on the side of the cover is formed in an annular shape surrounding the opening, the partition wall portion of the cover co the plurality of stop portions are distributed arranged in a direction along a circular of the partition wall portion from the partition wall portion having a hook portion It protrudes to the side, Serial at the peripheral portion of the cover number mounting hole portion is provided in corresponding to the stop part, on one or both of the portion corresponding to the installation section of the cover and the installation portion protruding portions are provided, wherein At least one of the convex portion provided on one of the convex portion provided on one of the installation portion and the portion corresponding to the installation portion of the cover, or both of the installation portion and the portion corresponding to the installation portion of the cover. and in a molding surrounding the opening or the through hole portion, when the cover is attached to the duct body so as to cover the porous material disposed in the installation portion, the said stop portion hook There is fitted in the mounting hole portion by the hook portion is fixed to the mounting hole, the cover is the coupled to the duct body and the convex portion is characterized by compressing the porous material or, or, before A partition wall portion projects from the cover and is formed in an annular shape surrounding the opening, and a convex portion is provided on one or both of the installation portion and the portion corresponding to the installation portion of the cover. The convex portion provided on one of the installation portion and the portion corresponding to the installation portion of the cover or the convex portion provided on both the installation portion and the portion corresponding to the installation portion of the cover. When the cover is attached to the duct body so as to cover the porous material disposed in the installation portion, the peripheral portion of the cover Is bonded to the partition wall by ultrasonic welding, vibration welding or heat welding or bonded by an adhesive, the cover is bonded to the duct body, and the convex portion compresses the porous material. This Or a partition wall portion projecting toward the cover and formed in an annular shape surrounding the opening, and the installation portion and a portion corresponding to the installation portion of the cover; One or both of them is provided with a convex portion, and corresponds to the convex portion provided on one of the installation portion and the portion corresponding to the installation portion of the cover or the installation portion of the cover and the installation portion of the cover. The duct main body is shaped so as to surround the opening or the through-hole portion at least one of the convex portions, and the cover covers the porous material disposed in the installation portion. When attached, the peripheral edge of the cover is bonded to the partition wall by either ultrasonic welding, vibration welding or thermal welding or bonded by an adhesive, and the cover is bonded to the duct body, Convex There should be characterized by compressing the porous material, or, in the installation portion is formed in a ring shape surrounding the opening with the partition wall portion projects to the side of the cover, the partition wall hook portion A plurality of stoppers are distributed in a direction along the annular shape of the partition wall, and protruded from the protruding end surface of the partition wall toward the cover. And a number of mounting hole portions corresponding to the stop portions are provided across the peripheral edge portion of the cover and the cover wall portion, and the cover is provided on the installation portion. When attached to the duct main body so as to cover the porous material arranged, the stopper and the hook are fitted into the attachment hole, and the hook is fixed to the attachment hole. By the front cover Coupled to the duct main body, wherein the cover wall portion surrounds the outer periphery of the partition wall.

The present invention, in the partition wall portion provided to project co the plurality of stop portions are distributed arranged in a direction along the annular partition wall portion from the septum wall on the side of the cover having a hook portion, the cover A plurality of mounting hole portions corresponding to the stop portions are provided on the peripheral edge portion, or a plurality of attachment hole portions corresponding to the stop portions are provided on the partition wall portion, and a plurality of hook portions are provided on the peripheral edge portion of the cover. by number of stop portion is provided to protrude from the cover to co-when being distributed disposed in a direction along around the periphery of the cover on the side of the duct body, porous cover is placed on the installation section When the cover is attached to the installation part so as to cover the material, the hook part is fixed to the attachment hole part, so that the cover is coupled to the duct body, or the peripheral part of the cover is ultrasonically welded to the partition wall part or Bonded by either vibration welding or heat welding or adhesive contact As a result, the air flow resistance inside the duct body can be reduced without generating a gap between the porous material and the installation part, without sucking extra hot air in the engine room. is there. Further, if the cover has been covered, and the plurality of stop portions and a plurality of mounting holes fitted with each other properly, the effect of attachment to the installation portion of the cover is facilitated. In the present invention, the partition wall portion is provided with a plurality of stopper portions having hook portions distributed in a direction along the annular shape of the partition wall portion and protrudes from the protruding end surface of the partition wall portion toward the cover. The cover has a cover wall portion that protrudes toward the duct body and is formed in an annular shape surrounding the through-hole portion, and a number of mounting hole portions corresponding to the stop portions are provided over the peripheral edge portion of the cover and the cover wall portion. When the cover is attached to the installation part so as to cover the porous material, the shape of the cover is appropriately maintained if the cover wall part is disposed so as to surround the outer peripheral part of the partition wall part of the installation part. Additionally, by a cover wall portion of the cover-law enclose the outer periphery of the partition wall portion of the installation section, there is an effect that a gap does not occur between the installation portion peripheral edge of the porous material.

The perspective view which decomposes | disassembles and shows the intake duct for vehicles which concerns on the form 1 for implementing invention. The perspective view which decomposes | disassembles and shows the duct main body which concerns on the form 1 for implementing invention. The perspective view which shows the vehicle intake duct which concerns on the form 1 for implementing invention. FIG. 10 is a sectional view taken along line 101-101 in FIG. 3. FIG. 102 is a sectional view taken along line 102-102 in FIG. 3; The ventilation resistance analysis figure which shows the flow line of the intake duct for vehicles which concerns on form 1 for implementing invention. Sectional drawing equivalent to the 102-102 sectional view taken on the line of the vehicle intake duct which concerns on Embodiment 2 for inventing. Sectional drawing equivalent to the 102-102 sectional view taken on the line of the vehicle intake duct which concerns on Embodiment 3 for inventing. The top view which shows the vehicle intake duct which concerns on the form 4 for implementing invention. The side view which shows the air intake duct for vehicles which concerns on the form 4 for inventing. FIG. 10 is a sectional view taken along line 103-103 in FIG. 9; Sectional drawing equivalent to the 102-102 sectional view taken on the line of the vehicle intake duct which concerns on Embodiment 5 for inventing. Sectional drawing similar to the 101-101 sectional view taken on the line of the vehicle intake duct which concerns on Embodiment 6 for inventing. Sectional drawing similar to the 101-101 sectional view taken on the line of the intake duct for vehicles which concerns on the form 7 for implementing invention. The perspective view which decomposes | disassembles and shows a part of vehicle intake duct which concerns on the form 8 for implementing invention. Sectional drawing similar to the 101-101 sectional view taken on the line of the vehicle intake duct which concerns on Embodiment 8 for inventing. The perspective view which decomposes | disassembles and shows the conventional vehicle intake duct. The perspective view which shows the air intake duct for vehicles which is proportional. The ventilation resistance analysis figure which shows the flow line of the intake duct for vehicles which is proportional. The perspective view which decomposes | disassembles and shows another conventional vehicle intake duct. The perspective view which decomposes | disassembles and shows another conventional vehicle air intake duct.

  In the embodiment for carrying out the invention, parts having the same function will be described with the same reference numerals.

  With reference to FIG. 1 thru | or FIG. 6, the vehicle air intake duct 1 which concerns on the form 1 for implementing invention is demonstrated. As shown in FIG. 1, a vehicle intake duct 1 according to Embodiment 1 for carrying out the invention constitutes a conduit for taking outside air into an air cleaner of an internal combustion engine of a vehicle outside the figure, A duct body 2, a porous material 3, and a cover 4 are provided as separately configured members. The duct main body 2 has a hollow rectangular tube shape surrounded by a peripheral wall portion made of four flat portions 5; 6; 7; 8 by a synthetic resin, while the straight pipe portion 9; And is configured as a curved pipe that changes the flow direction 12 of the air passing through the inside of the duct body 2 into a direction parallel to the plane portions 5; 6 and a direction intersecting the plane portions 5; 6. Due to the presence of the straight pipe portions 9; 10 and the curved pipe portion 11, the duct main body 2 is a curved pipe that bends in a direction parallel to the air flow direction 12 passing through the inside of the duct main body 2. One end of the duct body 2 constitutes a side for introducing outside air. The other end of the duct body 2 constitutes a side for supplying outside air to the air cleaner. The straight pipe portion 9 is arranged on one end side of the duct body 2. The straight pipe portion 10 is disposed on the other end side of the duct body 2. The curved pipe portion 11 is a portion that connects the straight pipe portions 9 and 10 to each other.

  An installation portion 14 is provided as a portion on which the porous material 3 is disposed on the outer surface of one flat portion 6 of the duct body 2. The installation part 14 is a model formed in a curved surface shape in a direction parallel to the air flow direction 12 passing through the inside of the duct body 2 across the straight pipe part 9 and the curved pipe part 11. The installation portion 14 is provided with an opening 15, a crosspiece 16, a partition wall 17, and a projection 18. The opening 15 penetrates the duct body 2 inside and outside, and a plurality of openings 15 are provided across the straight pipe portion 9 and the curved pipe portion 11. The plurality of openings 15 are partitioned from each other by a crosspiece 16. The surface on the cover 4 side of the installation portion 14 and the surface on the cover 4 side of the crosspiece portion 16 constitute a uniform surface.

  The partition wall portion 17 protrudes from the outer peripheral portion of the installation portion 14 toward the cover 4 so as to be at a predetermined angle with respect to the outer surface of the straight pipe portion 9, that is, parallel to each other, and includes a plurality of It is formed in an annular shape surrounding the opening 15 and the crosspiece 16. The outer surface of the straight pipe portion 9 is a surface of the straight pipe portion 9 on the cover 4 side. In the following description, the predetermined angle is an angle that coincides with a direction in which the duct body 2 or the cover 4 is molded from the mold after being molded with the mold, and is not limited to a right angle. The partition wall portion 17 is not limited to modeling that is continuous without a break in the direction surrounding the opening 15 and the crosspiece 16, and can be applied to modeling with a cut. The height of the partition wall 17 protruding from the installation portion 14 toward the cover 4 is smaller than the thickness of the porous material 3. That is, in a state where the porous material 3 is accommodated inside the partition wall portion 17 and contacts the installation portion 14 and the crosspiece portion 16 and covers all of the plurality of openings 15, a part of the porous material 3 is the partition wall. It protrudes to the cover 4 side from the portion 17.

  The partition wall portion 17 is provided with a plurality of stop portions 19. The stoppers 19 are distributed in a distributed manner so as to be evenly distributed in the direction along the annular shape of the partition wall 17, and are parallel to each other so as to have a predetermined angle with respect to the outer surface of the straight pipe portion 9. It protrudes to the cover 4 side from the protruding end surface of the partition wall portion 17. In FIG. 1, a plurality of stop portions 19 are dispersedly arranged in the direction along the annular shape of the partition wall portion 17 such that a plurality of the stop portions 19 are dispersedly disposed on each of the upper and lower sides and the left and right side portions of the partition wall portion 17. ing. A hook portion 20 is provided at the tip of the stop portion 19. The convex portion 18 protrudes so as to stand at a predetermined angle on the cover 4 side from a portion located on the opening portion 15 side of the installation portion 14 and surrounds the plurality of opening portions 15 and the crosspiece portions 16. It is formed in an annular shape. The convex portion 18 is not limited to modeling that is continuous without a break in the direction surrounding the opening 15 and the crosspiece 16, and can be applied to modeling with a cut.

  Note that each of the duct main body 2, the installation portion 14, the opening portion 15, the crosspiece portion 16, the partition wall portion 17, the convex portion 18, the stopper portion 19, and the hook portion 20 is a synthetic that injects a molding material made of synthetic resin into a molding die. It is integrally formed by a resin molding method.

  The porous material 3 is a member that is attached to the installation portion 14 in order to absorb resonance vibration caused by outside air that is taken into the internal combustion engine of the vehicle from the duct body 2 and reduce intake noise, and is a non-woven fabric molding that has air permeability. The shape of the body along the flow direction 12 of the air passing through the inside of the duct body 2 is formed in the same curved shape as the installation portion 14 so as to reduce the airflow resistance inside the duct body 2 by the body. Accordingly, the porous material 3 of FIG. 1 has an area larger than that of the conventional flat plate-shaped porous material 1002 of FIG. The porous material 3 is formed in a curved shape having a size that fits inside the partition wall portion 17. When the porous material 3 is placed on the installation portion 14, the porous material 3 is accommodated inside the partition wall portion 17 and comes into contact with the installation portion 14 and the crosspiece portion 16 so that all of the plurality of openings 15 are formed. To cover.

  The cover 4 has a size that covers the porous material 3 and the partition wall portion 17 with a synthetic resin and is formed in the same curved shape as the installation portion 14. The cover 4 is provided with a through hole portion 22, a crosspiece portion 23, an attachment hole portion 24, a covering wall portion 25, a concave portion 26, and a convex portion 27. The through-hole part 22 enables ventilation to the opening part 15, and a plurality of through-hole parts 22 are provided so as to relate to each of the plurality of opening parts 15. The plurality of through-hole portions 22 are partitioned by a crosspiece 23. A plurality of attachment holes 24 are provided corresponding to each of the plurality of stoppers 19 across the peripheral edge portion of the cover 4 and the cover wall portion 25, and the outer surface of the straight pipe portion 9 in the cover 4. Are formed so as to be at a predetermined angle with respect to the plane portion parallel to the surface. The covering wall portion 25 is formed from the peripheral portion of the cover 4 to the duct body 2 so as to be at a predetermined angle with respect to a plane portion parallel to the outer surface of the straight pipe portion 9 in the cover 4. It protrudes to the side and is formed in an annular shape surrounding the plurality of through-hole portions 22 and the crosspieces 23. The covering wall part 25 is not limited to the shaping | molding which continues without a cut | interruption in the direction surrounding the through-hole part 22 and the crosspiece 23, The shaping | molding which provided the cut | interruption is applicable. Moreover, you may provide a cut in both the partition part 17 and the covering wall part 25. FIG.

  The duct body 2 may be configured as a pipe formed in one hollow rectangular tube shape by injecting a synthetic resin material into a mold, but for implementing the invention as shown in FIG. In Embodiment 1, the case where it comprised from the two main body structure bodies 29; 30 formed by inject | pouring a synthetic resin material into a shaping | molding die was illustrated.

  With reference to FIG. 2, two main body structural bodies 29; 30 according to the first embodiment for carrying out the invention will be described. One main body constituting body 29 includes one flat surface portion 5 where the installation portion 14 is not provided, a flat surface portion 31; 32 protruding from the flat surface portion 5 to the inside of the duct main body 2, and the flat surface portion 31; 2 and a flange portion 33; 34 protruding outward. The other main body constituting body 30 includes one flat surface portion 6 provided with the installation portion 14, a flat surface portion 35; 36 protruding from the flat surface portion 6 to the inside of the duct main body 2, and the flat surface portion 35; And flange portions 37 and 38 projecting outward.

  Then, the two main body components 29; 30 are combined so as to form one hollow rectangular tube shape, the flange portions 33; 37 are joined to each other in a sealing manner, and the flange portions 34; 38 are joined to each other in a sealing manner. Is done. Accordingly, as shown in FIG. 4, the plane portion 31; 35 constitutes one plane portion 7 where the installation portion 14 is not provided, and the plane portion 32; 36 is one plane where the installation portion 14 is not provided. The part 8 is configured, and the two main body constituting bodies 29; 30 are configured as the duct main body 2 shown in FIG.

  As shown by the phantom lines in FIGS. 4 and 5, since the cover wall portion 25 is provided on the cover 4, a concave portion 26 is formed in a portion of the cover 4 located on the duct body 2 side. The height of the cover wall portion 25 protruding from the cover 4 toward the duct body 2 is smaller than the height of the partition wall portion 17. That is, in the state where the porous material 3 is accommodated inside the partition wall portion 17 and contacts the installation portion 14 and the crosspiece portion 16 and covers all of the plurality of openings 15, the cover 4 is covered with the porous material 3 and the partition wall. In the case where the stopper portion 19 and the hook portion 20 are fitted into the attachment hole portion 24, the hook portion 20 is fixed to the attachment hole portion 24, and the cover 4 is fixed to the duct main body 2. 4 presses the porous material 3 so as not to float on the installation part 14.

  The concave portion 26 is shaped so as to open to the duct body 2 side of the cover 4 and to be surrounded by the covering wall portion 25. The convex portion 27 protrudes from the portion located on the cover wall portion 25 side of the cover 4 so as to stand at a predetermined angle on the duct body 2 side, and includes a plurality of through-hole portions 22 and crosspiece portions 23. It is formed in an annular shape surrounding. The convex portion 27 is not limited to modeling that is continuous without a break in the direction surrounding the through-hole portion 22 and the crosspiece 23, and is also applicable to modeling with a cut. Moreover, you may provide a cut in both the convex part 18 and the convex part 27. FIG.

  Further, the convex portions 18 of the duct main body 2 and the convex portions 27 of the cover 4 are alternately arranged in a direction parallel to the flat portion 6 of the duct main body 2 when the cover 4 is attached to the duct main body 2. It is configured. 4 and 5 exemplify the case where the convex portion 18 is arranged on the opening 15 side in a direction parallel to the flat portion 6 of the duct body 2 with respect to the convex portion 27. On the other hand, although not shown, the present invention can be applied even when the convex portion 18 is disposed on the partition wall 17 side in a direction parallel to the flat portion 6 of the duct body 2 with respect to the convex portion 27.

  A case where the porous material 3 is attached to the duct body 2 with the cover 4 will be described with reference to FIGS. 4 and 5. As shown by solid lines in FIGS. 4 and 5, the porous material 3 is accommodated inside the partition wall portion 17. Thereby, the porous material 3 is appropriately arranged on the installation portion 14, and the peripheral portion of the porous material 3 does not turn up from the installation portion 14, and the porous material 3 contacts the installation portion 14 and the crosspiece 16. Thus, all of the plurality of openings 15 are covered. Next, the cover 4 indicated by an imaginary line is placed on the porous material 3 and the partition wall 17 as indicated by a solid line. When the cover 4 is thus covered, the partition wall 17, the stopper 19, and the covering wall 25 protrude in parallel with each other so as to have a predetermined angle with respect to the outer surface of the straight pipe portion 9. Since the cover 4 is covered from the direction of a predetermined angle with respect to the outer surface of the straight pipe portion 9, all the mounting hole portions 24 of the cover 4 are appropriately fitted into all the stop portions 19, so that the cover 4 Attachment to the installation part 14 becomes easy.

  Further, as all the stop portions 19 and all the hook portions 20 are fitted into all the mounting hole portions 24, the peripheral portion of the cover 4, the crosspiece portion 23, and the convex portion 27 form the porous material 3. 14, all the hook portions 20 are fixed to all the mounting hole portions 24, and the cover 4 is coupled to the duct body 2. In this way, when the cover 4 is coupled to the duct body 2, the stoppers 19 are dispersed and arranged so as to be evenly distributed in the direction along the annular shape of the partition wall portion 17, so that the cover 4 is a peripheral portion of the porous material 3. The peripheral portion of the porous material 3 can be pressed against the installation part 14 so that no gap is generated between the installation part 14 and the installation part 14.

  Further, when the cover 4 is coupled to the duct body 2, the cover wall portion 25 of the cover 4 is disposed so as to surround the outer peripheral portion of the partition wall portion 17, and the cover 4 and the installation portion 14 compress the porous material 3. In addition, since the gap is not generated between the peripheral edge portion of the porous material 3 and the installation portion 14 by sandwiching and supporting the air, the hot air in the engine room is not sucked in excessively, and the air is inside the duct body 2. Ventilation resistance when passing through can be reduced. Further, the porous material 3 is sandwiched between the crosspiece 16 of the duct main body 2 and the crosspiece 23 of the cover 4, thereby preventing the porous material 3 from dropping.

  4 and 5, when the curved porous material 3 is supported by being sandwiched between the installation portion 14 and the cover 4, the convex portions 18; 27 are the peripheral edges of the porous material 3. Since the portions are alternately compressed in the direction parallel to the plane portion 6, the positional shift of the porous material 3 can be prevented, and the peripheral edge of the porous material 3 can be brought into close contact with the installation portion 14 without generating a gap. It is possible to prevent excessive suction of hot air in the engine room from the peripheral edge of the porous material 3. Further, since the cover wall portion 25 is provided on the cover 4, the shape of the cover 4 is appropriately maintained as compared with a plate-like structure in which the cover 4 is not provided with the cover wall portion 25. It is also possible to remove one or both of the convex portions 18;

  In addition, although illustration is abbreviate | omitted, you may couple | bond the cover 4 and the stop part 19 mutually by either ultrasonic welding, vibration welding, thermal welding, or adhesion | attachment by an adhesive agent. In this case, the hook portion 20 is bonded to the cover 4 by any one of ultrasonic welding, vibration welding, and heat welding, or bonded by an adhesive, or the hook portion 20 is not provided on the stopper portion 19. It is conceivable that the portion 19 is bonded to the cover 4 by ultrasonic welding, vibration welding, or thermal welding, or by bonding with an adhesive. The stop portion 19 may be removed, and the cover 4 may be coupled to the installation portion 14 with a fixing tool such as a rivet or a screw.

As shown in FIG. 6, as an analysis of the ventilation resistance of the assembled vehicle intake duct 1, the area when the vehicle intake duct 1 is cut in a direction orthogonal to the flow of intake air = 3914 mm ² , the vehicle intake duct When air flow of 10 m ³ / min was flowed through 1 and the pressure loss near the outlet of the vehicle intake duct 1 was determined by analysis, pressure loss = −654 Pa, and this pressure loss = −654 Pa is shown in FIG. The pressure loss in the conventional vehicle intake duct 1001 shown is improved by about 13% from −752 Pa. Moreover, the streamline display by analysis of ventilation resistance was the result shown in FIG. In FIG. 6, 39 indicates a streamline entering the duct body 2, and 40 indicates a streamline entering the duct body 2 from the porous material 3 and the opening 15. Considering this FIG. 6, since the streamlines in the straight pipe portion 9 and the curved pipe portion 11 of the duct body 2 are not disturbed, the ventilation resistance is small.

  With reference to FIG. 7, the vehicle intake duct 1 according to the second embodiment for carrying out the invention will be described. In the vehicle intake duct 1 according to the second embodiment for carrying out the invention, the installation portion 14 is located on the straight pipe portion 10 located on the downstream side in the air flow direction 12 through the inside of the duct body 2 with respect to the curved pipe portion 11. The height at which the upstream side in the air flow direction 12 through which the installation part 14 and the partition part 17 pass through the inside of the duct body 2 protrudes from the flat part 5 of the straight pipe part 10 toward the cover 4 is the highest. The height at which the downstream side in the air flow direction 12 passing through the inside of the duct body 2 projects from the flat portion 5 of the straight pipe portion 10 toward the cover 4 is the lowest. In other words, the installation part 14 is provided on the flat part 5, and the installation part 14 and the partition part 17 are smooth in height from the upstream side to the downstream side in the air flow direction 12 passing through the inside of the duct body 2. It is a modeling that becomes lower. Therefore, the curved surface shape of the cover 4, the installation part 14, and the porous material 3 is configured to be different from the curved surface shape of the cover 4, the installation part 14, and the porous material 3 shown in FIG. 1. Although the porous material 3 in FIG. 9 is less bent than the porous material 3 in FIG. 1, the step resistance at the installation portion 14 is eliminated as much as possible to reduce the ventilation resistance. Further, the porous material 3 of FIG. 9 has an area larger than that of the conventional flat plate-shaped porous material 1002 of FIG. In FIG. 7, the curved pipe part 11 is directed from the curved pipe part 11 toward the straight pipe part 10 so that the flat part 5 is arranged on the outer peripheral side of the bend and the flat part 6 is arranged on the inner peripheral side of the bend. The case where it turned and was illustrated. On the other hand, the curved pipe part 11 is bent from the curved pipe part 11 toward the straight pipe part 10 so that the flat part 5 is arranged on the inner peripheral side of the bend and the flat part 6 is arranged on the outer peripheral side of the bend. Even in this case, the present invention can be similarly applied by replacing the flat portion 5 in FIG. 7 with the flat portion 6.

  With reference to FIG. 8, the vehicle intake duct 1 according to Embodiment 3 for carrying out the invention will be described. A vehicle intake duct 1 according to Embodiment 3 for carrying out the invention is configured in a flat plate shape in which a porous material 3 has flexibility. The porous material 3 is disposed on the installation portion 14, the cover 4 is covered with the porous material 3 and the partition wall portion 17, and the cover wall portion 25 is disposed on the outer peripheral portion of the partition wall portion 17. 27 compresses the porous material 3 toward the installation portion 14, the stop portion 19 and the hook portion 20 are fitted into the attachment hole portion 24, and the hook portion 20 is fixed to the attachment hole portion 24. Is connected to the duct body 2, the covering wall portion 25 is disposed so as to surround the outer peripheral portion of the partition wall portion 17, and the cover 4 and the installation portion 14 are supported by compressing and sandwiching the porous material 3.

  With reference to FIG. 9 thru | or FIG. 11, the vehicle intake duct 1 which concerns on the form 4 for inventing is demonstrated. As shown in FIGS. 9 and 10, the duct main body 2 in the vehicle intake duct 1 according to the fourth embodiment for carrying out the invention is a bent pipe twisted around the air flow direction 12 passing through the inside of the duct main body 2. Configured as In particular, as shown in FIGS. 10 and 11, each of the two flat portions 5; 6 of the duct body 2 is formed with a curved surface shape parallel to the air flow direction 12 passing through the inside of the duct body 2. The porous material 3 is individually disposed on each of the two installation portions 3, and the cover 4 is individually attached to both the installation portions 3.

  Specifically, in FIG. 11, one porous material 3 indicated by a solid line is disposed on one installation portion 14 of the plane portion 5, and one porous material 3 indicated by a phantom line is indicated by a solid line. As one covering wall portion 25 is fitted into one partition wall portion 17 and covered with the material 3 and one partition wall portion 17, one convex portion 27 attaches one porous material 3 to one installation portion 14. One of the stoppers 19 and one of the hooks 20 is fitted into one of the mounting holes 24, and the one of the hooks 20 is fixed to the one of the mounting holes 24. 4 is coupled to the duct body 2, one covering wall portion 25 is disposed so as to surround the outer peripheral portion of one partition wall portion 17, and one cover 4 and one installation portion 14 form one porous material 3. Compress and support with pinching. Further, the other porous material 3 indicated by the solid line is disposed on the other installation portion 14 of the plane portion 6, and the other porous material 3 and the other partition wall portion are indicated by the other cover 4 indicated by the phantom line as indicated by the solid line. 17, the other convex portion 27 compresses the other porous material 3 toward the other installation portion 14, and the other stop portion 19 and the other hook portion 20 are fitted into the other mounting hole portion 24. Then, the other hook portion 20 is fixed to the other mounting hole portion 24, whereby the other cover 4 is coupled to the duct body 2, and the other cover wall portion 25 surrounds the outer peripheral portion of the other partition wall portion 17. The other cover 4 and the other installation part 14 compress and sandwich the other porous material 3 to support it.

  With reference to FIG. 12, the intake duct 1 for vehicles which concerns on the form 5 for implementing invention is demonstrated. In the vehicle intake duct 1 according to the fifth embodiment for carrying out the invention, the positions of the crosspieces 16 of the duct main body 2 and the crosspieces 23 of the cover 4 are staggered in the air flow direction 12 passing through the inside of the duct main body 2. It is configured. And the porous material 3 is arrange | positioned at the installation part 14, the cover 4 is covered by the porous material 3 and the partition part 17, the convex part 27 compresses the porous material 3 to the installation part 14, and the stop part 19 And the hook portion 20 are fitted into the attachment hole portion 24, and the hook portion 20 is fixed to the attachment hole portion 24, whereby the cover 4 is coupled to the duct body 2 and the cover wall portion 25 is the outer peripheral portion of the partition wall portion 17. The cover 4 and the installation part 14 are compressed and sandwiched to support the porous material 3.

A vehicle intake duct 1 according to a sixth embodiment for carrying out the invention will be described with reference to FIG. The vehicle air intake duct 1 according to Embodiment 6 for carrying out the invention, as shown in Figure 13, and the stopper portion 19 from the duct body 2 (see FIG. 4) and the hook portion 20 (see FIG. 4) is removed , the mounting hole portion 24 (see FIG. 4) and the cover wall portion 25 (see FIG. 4) and the recess 26 (see FIG. 4) is removed from the cover 4. Then, as shown by a solid line in FIG. 13, after the cover 4 is covered with the porous material 3 and the partition wall portion 17, the peripheral edge portion of the cover 4 and the partition wall portion 17 are given ultrasonic waves and bonded to each other over the entire circumference. As a result, the installation portion 14 of the duct body 2 and the cover 4 are compressed and sandwiched and supported by the porous material 3.

  With reference to FIG. 14, the vehicle intake duct 1 according to Embodiment 7 for carrying out the invention will be described. In the vehicle intake duct 1 according to the embodiment 7 for carrying out the invention, the height of the partition wall 17 protruding from the installation portion 14 toward the cover 4 is larger than the thickness of the porous material 3. 4 is higher than the height of the convex portion 27 shown in FIG. 4 so that the height of the convex portion 27 protruding from the cover 4 toward the duct body 2 is compressed by the convex portion 27 toward the installation portion 14. Is also a large dimension. And the porous material 3 is arrange | positioned at the installation part 14, the cover 4 is covered by the porous material 3 and the partition part 17, the convex part 27 compresses the porous material 3 to the installation part 14, and the stop part 19 And the hook portion 20 are fitted into the attachment hole portion 24, and the hook portion 20 is fixed to the attachment hole portion 24, whereby the cover 4 is coupled to the duct body 2 and the cover wall portion 25 is the outer peripheral portion of the partition wall portion 17. The cover 4 and the installation part 14 are compressed and sandwiched to support the porous material 3.

  With reference to FIG.15 and FIG.16, the vehicle intake duct 1 which concerns on the form 8 for implementing invention is demonstrated. As shown in FIG. 15, in the vehicle intake duct 1 according to the eighth embodiment for carrying out the invention, the mounting hole portion 24 is provided on the duct body 2 side, and the stop portion 19 and the hook portion 20 are on the cover 4 side. It is the structure provided in. Specifically, the attachment hole portion 24 is provided in the partition wall portion 17, and the stop portion 19 is provided in the covering wall portion 25. A pair of grooves 41 are formed in the cover wall portion 25 from the end surface on the duct body 2 side to the cover 4 side. The elastic piece left between the pair of grooves 41 is the stopper 19. The height of the stopper 19 protruding from the cover 4 toward the duct body 2 is smaller than the height of the cover wall 25 protruding from the flat portion 6 toward the cover 4. A hook 20 is provided at the end of the stop 19 on the duct body 2 side.

  In FIG. 16, the porous material 3 is disposed on the installation portion 14, the cover 4 is placed on the porous material 3 and the partition wall portion 17, and the convex portion 27 compresses the porous material 3 toward the installation portion 14. The stop portion 19 and the hook portion 20 are fitted into the attachment hole portion 24, and the hook portion 20 is fixed to the attachment hole portion 24, whereby the cover 4 is coupled to the duct body 2 and the covering wall portion 25 is the partition wall portion. 17 is arranged so as to surround the outer peripheral portion of 17, and the cover 4 and the installation portion 14 are supported by compressing and sandwiching the porous material 3.

1 is a vehicle air intake duct, 2 is a duct body, 3 is a porous material, 4 is a cover, 5 to 8 are flat portions, 9; 10 is a straight pipe portion, 11 is a curved pipe portion, 12 is an air flow direction, 13 is a missing number, 14 is an installation portion, 15 is an opening portion, 16 is a crosspiece, 17 is a partition wall portion, 18 is a convex portion, 19 is a stop portion, 20 is a hook portion, 21 is a missing number, 22 is a through hole portion, 23 Is a crosspiece, 24 is a mounting hole portion, 25 is a covering wall portion, 26 is a concave portion, 27 is a convex portion, 28 is a missing number, 29; 30 is a main body component, 31; 32 is a plane portion, 33; , 35; 36 are plane portions, 37; 38 are flange portions, 39; 40 are missing numbers, 41 are grooves, 42 to 100 are missing numbers, 101; 102 are lines indicating cross-sectional locations, 104 to 1100 are missing numbers, and 1001 is a vehicle. Air intake duct, 1002 is a porous material, 1003 is a duct body, 1004 is a flat portion, 1005 Opening portion, 1006 is a suction port, 1007 is a connecting portion, 1008; 1009 is a straight pipe portion, 1010 is a curved pipe portion, 1011 is a barrier, 1012 to 1014 are streamlines, 1015 to 1099 are missing numbers, 1101 is a vehicle intake duct 1102 is a duct body, 1103 is a porous material, 1104 is a cover, 1105 is an opening, 1106 is a hole, 1107 is a through hole, 1108 is a protrusion, 1109 is a flange, 1110 is a protrusion, and 1111 is a flange. , 1112 is a hole, 1113 to 1200 are missing numbers, 1201 is a vehicle intake duct, 1202 is a duct body, 1203 is a porous material, 1204 is a cover, 1205 is a first half, 1206 is a second half, 1207 1208 is a flange, 1209 is an opening, 1210 is a rib, 1211 is a mounting hole, 1212 is a through hole, 1213 is a stop, 14 hook.

Claims (5)

A duct body formed in a hollow rectangular tube shape, and the installation portion of the curved shape provided to bend in the flow direction of air through the interior of the duct body on the peripheral wall portion of the duct body, and out of the duct body an opening formed on the installation portion so as to penetrate into the porous material from the outside of the duct body is disposed in the installation portion so as to cover the opening, the duct outside from the opening portion of the main body the vehicle air intake duct example Bei and a cover having a through hole to allow air flow to, the said installation portion is formed in a ring shape surrounding the opening with the partition wall section protrudes on the side of the cover , wherein the the partition wall portion provided to protrude on the side of the cover from the co the plurality of stop portions are distributed arranged in a direction along a circular of the partition wall partition wall portion having a hook portion, the cover the stop portion at the peripheral portion of the Corresponding number mounting hole portion is provided in said at one or both of the portion corresponding to the installation portion of the installation portion and the cover convex portion is provided, corresponding to the installation section of the cover and the installation unit Surrounding the opening or the through hole at least one of the convex portions provided on one of the convex portion or the installation portion and the portion corresponding to the installation portion of the cover. a configuration, when the cover is attached to the duct body so as to cover the porous material disposed in the installation portion, and the stopper portion and the hook portion is fitted into the mounting hole, the hook by parts is fixed to the mounting hole portion, a vehicle air intake duct, characterized in that the cover is coupled to said duct body and the convex portion to compress the porous member. A duct body formed in a hollow rectangular tube shape, and the installation portion of the curved shape provided to bend in the flow direction of air through the interior of the duct body on the peripheral wall portion of the duct body, and out of the duct body an opening formed on the installation portion so as to penetrate into the porous material from the outside of the duct body is disposed in the installation portion so as to cover the opening, the duct outside from the opening portion of the main body the vehicle air intake duct example Bei and a cover having a through hole to allow air flow to, the said installation portion is formed in a ring shape surrounding the opening with the partition wall section protrudes on the side of the cover , the peripheral edge of the cover protrudes from the cover to co the plurality of stop portion having a hook portion is distributed disposed in a direction along around the periphery of the cover on the side of the duct body is, the partition wall portion The said stop portion mounting hole of a corresponding number of the provided, said one or both of the portion corresponding to the installation portion of the installation portion and the cover convex portion is provided, of the cover and the installation unit The convex portion provided on one of the portions corresponding to the installation portion or the installation portion and the portion corresponding to the installation portion of the cover provided on at least one of the convex portions or the opening or the a configuration surrounding the through hole portion, when the cover is attached to the duct body so as to cover the porous material disposed in the installation portion, and the stopper portion and the hook portion in the mounting hole portion fitted into, by the hook portion is fixed to the mounting hole portion, a vehicle air intake duct, characterized in that the cover is coupled to said duct body and the convex portion to compress the porous member. A duct body formed in a hollow rectangular tube shape, an installation portion having a curved shape provided on a peripheral wall portion of the duct body so as to bend in a flow direction of air passing through the inside of the duct body, and inside and outside of the duct body An opening formed in the installation part so as to penetrate the porous body, a porous material disposed in the installation part so as to cover the opening from the outside of the duct main body, and the opening from the outside of the duct main body A vehicle air intake duct having a cover having a through-hole portion that allows air to be ventilated, wherein a partition wall portion projects from the cover side and is formed in an annular shape surrounding the opening portion. A convex portion is provided on one or both of the installation portion and the portion corresponding to the installation portion of the cover, and the one provided on one of the installation portion and the portion corresponding to the installation portion of the cover. Convex part or the installation And at least one of the convex portions surrounding the opening or the through hole, and the cover is disposed in the installation portion. When the cover is attached to the duct body so as to cover the material, the peripheral edge of the cover is bonded to the partition wall by either ultrasonic welding, vibration welding or heat welding or bonded by an adhesive, A vehicle air intake duct , wherein a cover is coupled to the duct body, and the convex portion compresses the porous material . A duct body formed in a hollow rectangular tube shape, an installation portion having a curved shape provided on a peripheral wall portion of the duct body so as to bend in a flow direction of air passing through the inside of the duct body, and inside and outside of the duct body An opening formed in the installation part so as to penetrate the porous body, a porous material disposed in the installation part so as to cover the opening from the outside of the duct main body, and the opening from the outside of the duct main body A vehicle air intake duct having a cover having a through-hole portion that allows air to be ventilated, wherein a partition wall portion projects from the cover side and is formed in an annular shape surrounding the opening portion. The partition wall is provided with a plurality of stoppers having hook portions distributed in a direction along the annular shape of the partition wall, and is provided to project from the projecting end surface of the partition wall to the cover side. Has a covering wall The mounting hole portion is formed in an annular shape that protrudes toward the main body and surrounds the through-hole portion, and the number of mounting hole portions corresponding to the stopper portion is provided across the peripheral edge portion of the cover and the cover wall portion. When attaching to the duct body so as to cover the porous material disposed in the part, the stopper and the hook part are fitted into the attachment hole part, and the hook part is fixed to the attachment hole part. Thus, the vehicle intake duct is characterized in that the cover is coupled to the duct body, and the covering wall portion surrounds the outer peripheral portion of the partition wall portion. One of the Claims 1 to 3 characterized by the above-mentioned. It is provided in both the said installation part and the part corresponding to the said installation part of the said cover, and the said convex part is alternately arrange | positioned in the direction parallel to the said installation part. The intake duct for vehicles described in 1.

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