Intake device

Abstract

To provide an intake device capable of reducing a burden on an operator.SOLUTION: In an intake device 1, a first rib 54 having a recessed part 55 is provided in a portion opposing to a lower mounting hole 520 of a mounting flange 5. Since the recessed part 55 can be used as a mark, an operator can access the lower mounting hole 520 by feeling for the recessed part 55 without visually recognizing the lower mounting hole 520. This structure enables the operator to eliminate the necessity for inserting a bolt 6 into the lower mounting hole 520 in the state of visually recognizing the lower mounting hole 520 by for example, peering into the mounting flange 5 from the lower side while crouching or bowing when mounting the intake device 1. Thus a burden on the operator can be reduced.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an intake system incorporating a cooling device. [Background technology]

[0002] BACKGROUND ART A known conventional intake device is, for example, that described in Patent Document 1 below.

[0003] A conventional intake system incorporating a cooling device is fixed to the cylinder head via a mounting flange provided at the end opposite the cylinder head, and is arranged to overhang the side of the cylinder head. Specifically, the system is fastened with bolts through multiple upper and lower mounting holes provided at the top and bottom of the mounting flange. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2012-219657 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the case of the conventional intake system, the cooling device is located between the surge tank and the cylinder head, and is positioned so that it overhangs the side of the cylinder head. This makes it difficult for an operator to visually inspect the lower mounting holes in the mounting flange when standing upright. When installing the intake system on the cylinder head, the operator must, for example, crouch or bend down to look into the lower mounting holes from below the intake system in order to insert bolts into the lower mounting holes. This requires a burden on the operator, and there is still room for improvement.

[0006] Therefore, the present invention has been devised in consideration of the technical problems of the conventional intake devices, and has an object to provide an intake device that can reduce the burden on the worker. [Means for solving the problem]

[0007] In one aspect, the present invention provides an intake device that is supported in a cantilevered manner so as to overhang the side of a cylinder head and is connected to an intake port that opens to the side of the cylinder head, the intake device comprising: a surge tank that guides intake air to the intake port; a cooling device that is interposed between the surge tank and the cylinder head and that cools the intake air that has been guided through the surge tank by circulating a refrigerant therethrough; a mounting flange that is interposed between the cooling device and the cylinder head and that mounts the cooling device to the side of the cylinder head; and a mounting flange that is interposed between the cooling device and the cylinder head and that mounts the cooling device to the side of the cylinder head. the cylinder head includes a plurality of upper and lower mounting holes provided at the top and bottom of the mounting flange, respectively, along the cylinder row direction of the cylinder head; fastening members that are inserted through the upper and lower mounting holes to fasten the mounting flange to the cylinder head; and a first rib that is formed integrally with the mounting flange so as to protrude downward, and is provided continuously or intermittently in the cylinder row direction at a position offset from the lower mounting hole in the direction of the overhang, the first rib having a recess that is recessed upward in a portion facing the lower mounting hole. [Effects of the Invention]

[0008] According to the present invention, a first rib is provided having a recess in a portion facing the lower mounting hole. Therefore, by using the recess as a guide, a worker can access the lower mounting hole by feel without visually checking the lower mounting hole. Specifically, a fastening member attached to a fastening tool can be inserted into the lower mounting hole using the recess as a guide. This eliminates the need for a worker to insert a fastening member into the lower mounting hole while visually checking the lower mounting hole, for example, by crouching or bending over to look into the mounting flange from below, thereby reducing the burden on the worker during installation of the intake device. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a perspective view of an intake device according to the present invention as viewed from below. [Figure 2] FIG. 2 is a front view of the intake device attached to the side of the cylinder head. [Figure 3] FIG. 3 is a cross-sectional view taken along line AA in FIG. 2. [Figure 4] FIG. 3 is an enlarged view of part B in FIG. 2. [Figure 5] 10 is an enlarged view of a main part of an intake device showing a modified example of a third rib according to the present invention. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0010] An embodiment of the intake system according to the present invention will be described in detail below with reference to the drawings. In this embodiment, the intake system is applied to a supercharged automobile engine (spark-ignition internal combustion engine), as in the conventional case.

[0011] (Configuration of intake system) FIG. 1 shows a perspective view of the intake device 1 as seen from below. FIG. 2 shows a front view of the intake device 1 attached to the side portion 21 of the cylinder head 2. FIG. 3 shows a cross-sectional view of the intake device 1 taken along line AA in FIG. 2. FIG. 4 shows an enlarged view of the main part of the intake device 1, showing an enlarged view of part B in FIG. 2.

[0012] 1 to 3, intake device 1 has a surge tank 3 that guides intake air to an intake port 22 (described later) and a cooling device 4 that cools the intake air guided to surge tank 3, which are connected in series to intake port 22 that opens in a side portion 21 of a cylinder head 2 of an engine via a mounting flange 5. That is, intake device 1 is provided so that cooling device 4 is interposed between cylinder head 2 and surge tank 3 and overhangs side portion 21 of cylinder head 2. Furthermore, intake device 1 is supported in a cantilevered manner on side portion 21 of cylinder head 2 by fastening mounting flange 5 to side portion 21 of cylinder head 2 via a plurality of bolts 6 that serve as fastening members.

[0013] The surge tank 3 is made of a resin material and has a generally cylindrical shape, and includes a tank body 30 extending in the longitudinal direction. The tank body 30 has a cylindrical intake pipe connection portion 31 at its upstream end. The intake pipe connection portion 31 is connected to an intake pipe (not shown) via a generally rectangular first flange 310. The tank body 30 also has an intake air inlet portion 32 on its downstream side facing the cooling device 4, which is a generally rectangular opening formed by cutting out the tank body 30 along the longitudinal direction. The intake air inlet portion 32 is connected to a first end portion 41, which is the upstream end of the cooling device 4, via any connecting means, such as crimping.

[0014] The cooling device 4 is a well-known intercooler formed in a generally rectangular block shape from a metal material with relatively high heat dissipation, such as aluminum. Although not specifically shown in FIG. 3 , the cooling device 4 includes an intake passage (not shown) and a refrigerant passage (not shown) that are adjacent to and separated from each other. That is, the cooling device 4 cools the intake air flowing through the intake passage (not shown) by heat exchange with the refrigerant flowing through the refrigerant passage (not shown). The intake passage (not shown) is configured to allow the intake air to flow in the direction in which the intake device 1 overhangs (Z direction). Meanwhile, the refrigerant passage (not shown) is configured to allow the refrigerant to flow in the vertical direction (Y direction) and in the direction in which the cylinders are aligned in the cylinder head 2 (X direction). Specifically, the refrigerant is introduced through an inlet 43 connected to the bottom of one end of the cooling device 4 in the X direction, passes through the other end in the X direction, makes a U-turn, and is discharged from an outlet 44 connected to the top of the one end in the X direction.

[0015] The mounting flange 5 is made of a resin material and formed into a generally cylindrical shape, and is connected to the second end 42, which is the downstream end of the cooling device 4, via any connecting means such as crimping. The mounting flange 5 has a cylindrical main body 50 formed into a generally cylindrical shape, as shown in FIGS. 1 to 3, for example. The cylindrical main body 50 has an intake passage 500 therein that penetrates along the Z direction, and the upstream end of the intake passage 500 is connected to the second end 42, which is the upstream end of the cooling device 4, and the downstream end of the intake passage 500 is connected to the intake port 22 of the cylinder head 2.

[0016] Furthermore, the mounting flange 5 integrally includes a plurality of upper mounting portions 51 and a plurality of lower mounting portions 52 (three in this embodiment) at the upper and lower ends of the mounting flange 5, sandwiching the cooling device 4, at a first end of the cylindrical main body 50 on the cylinder head 2 side in the Z direction. As shown in FIG. 2, for example, the upper mounting portions 51 are provided so as to protrude upward from the cylindrical main body 50, and are arranged in parallel at approximately equal intervals along the X direction, which is the cylinder alignment direction of the cylinder head 2. Similarly, the lower mounting portions 52 are provided so as to protrude downward from the cylindrical main body 50, and are arranged in parallel at approximately equal intervals along the X direction, which is the cylinder alignment direction of the cylinder head 2. Furthermore, the upper mounting portions 51 and the lower mounting portions 52 adjacent to each other in the X direction are connected to each other via plate-rib-shaped connecting portions 53, as shown in FIGS. 1 to 3, for example.

[0017] Furthermore, a metal sleeve 7 that receives the axial force of the bolt 6 is inserted into each of the upper and lower mounting portions 51 and 52. As a result, an upper mounting hole 510 is formed on the inner circumferential side of the sleeve 7 inserted into the upper mounting portion 51. Similarly, a lower mounting hole 520 is formed on the inner circumferential side of the sleeve 7 inserted into the lower mounting portion 52. The shanks (male threaded portions) of the bolts 6 inserted into the upper and lower mounting holes 510 and 520 of the mounting flange 5 are screwed into female threaded holes (not shown) formed in the side portion 21 of the cylinder head 2, thereby fixing the mounting flange 5 to the side portion 21 of the cylinder head 2.

[0018] Furthermore, the mounting flange 5 has a first rib 54 that extends in the X direction and protrudes downward, integrally formed at a second end of the cylindrical main body 50 on the cooling device 4 side in the Z direction. The first rib 54 is provided spaced (offset) in the Z direction from the lower mounting hole 520, and in this embodiment, is provided continuously in the X direction, which is the cylinder row direction of the cylinder head 2. Note that, although not specifically shown in the drawings, the first ribs 54 may be provided intermittently between the lower mounting portions 52 in the X direction.

[0019] 1, 2, and 4, the mounting flange 5 has a recess 55 formed by recessing a portion facing the lower mounting hole 520 in the opposite direction (upward) from the protruding direction of the lower mounting portion 52. In this embodiment, the first rib 54 is provided continuously in the X direction, so that both sides of the recess 55 in the X direction are connected by the first rib 54. The recess 55 is formed in a roughly semicircular shape with an inner diameter that is sufficiently larger than the inner diameter of the lower mounting hole 520.

[0020] Note that the recess 55 can be changed to any shape, such as a rectangular shape, in addition to the semicircular shape described above, depending on the specifications of the intake device 1. Although not specifically shown in the drawings, the recess 55 may be formed by a gap formed between the first ribs 54 adjacent to each other in the X direction, as a result of the first ribs 54 being provided intermittently in the X direction.

[0021] The mounting flange 5 also has integral second ribs 56 that extend in the Z direction and connect the connecting portions 53 and the first ribs 54 that face each other in the Z direction, and adjacent second ribs 56 in the X direction are connected to each other by the first ribs 54. In this way, the second ribs 56 that connect the connecting portions 53 and the first ribs 54 are connected to each other by the first ribs 54, thereby increasing the rigidity of the lower end portion of the mounting flange 5. Furthermore, as shown in FIGS. 1 to 3, the first ribs 54 also have integral fourth ribs 58 that connect the first ribs 54 and the cylindrical main body 50, and the rigidity of the mounting flange 5 is further increased by the fourth ribs 58.

[0022] 4, the mounting flange 5 is provided with a protrusion 59 that protrudes downward from the bottom of each lower mounting hole 520, i.e., the lower end of the lower mounting portion 52. The cross section of the protrusion 59 is formed in any shape, such as rectangular or semicircular (rectangular in this embodiment), and is provided so as to serve as a guide (handhold) in conjunction with the recess 55 near the lower mounting hole 520. In other words, the protrusion 59 functions, together with the recess 55, as an auxiliary mark for locating the position of the lower mounting hole 520 by feel.

[0023] Additionally, third ribs 57 are provided integrally with the surge tank 3 on the outer surface of the tank body 30 of the surge tank 3. The third ribs 57 extend in the vertical direction (Y direction) to connect the upper and lower ends of the second flange portion 320 provided on the outer peripheral edge of the intake air introduction portion 32 and are vertical ribs that extend linearly toward the lower mounting portion 52. That is, the third ribs 57 are provided corresponding to the lower mounting holes 520, respectively, and are positioned so as to generally coincide with the centers C of the lower mounting holes 520 in the X direction.

[0024] 1 and 2, the third rib 57 may be configured only with a vertical rib, or may be configured as in another example shown in Fig. 5. That is, in this other example, the third rib 57 may be formed in the shape of a downward arrow by combining a first vertical rib 571 extending linearly downward toward the lower mounting hole 520 and a pair of oblique ribs 573 that are obliquely arranged diagonally downward toward the lower mounting hole 520 and obliquely intersect the first vertical rib 571. That is, the third rib 57 may be configured in the shape of a downward arrow by providing, on the outer surface of the surge tank 3, the first vertical rib 571 extending linearly downward toward the lower mounting hole 520, a pair of second vertical ribs 572 arranged parallel to both sides of the first vertical rib 571 in the X direction, and a pair of oblique ribs 573 that connect diagonal corners of the first vertical rib 571 and the pair of second vertical ribs 572.

[0025] (Effects of this embodiment) The intake device 1 according to this embodiment is provided with a first rib 54 having a recess 55 at a portion facing the lower mounting hole 520. Therefore, by using the recess 55 as a guide, the worker can access the lower mounting hole 520 by feel without visually checking the lower mounting hole 520. That is, the worker can insert the bolt 6, which is a fastening member attached to a fastening tool, into the lower mounting hole 520 using the recess 55 as a guide to fasten the bolt 6. This eliminates the need for the worker to insert the bolt 6 into the lower mounting hole 520 while visually checking the lower mounting hole 520, for example, by crouching or bending over to look into the mounting flange 5 from below, thereby reducing the burden on the worker.

[0026] In this embodiment, the first ribs 54 are provided continuously in the cylinder row direction (X direction) so as to connect the second ribs 56, and both sides in the cylinder row direction (X direction) are connected across the recess 55. In this way, by providing the first ribs 54 continuously so as to connect the second ribs 56, it is possible to improve the rigidity of the lower end of the mounting flange 5 on which the weight of the intake device 1 acts. This maintains a stable mounting state of the intake device 1 and makes it possible to suppress vibration of the intake device 1 caused by external input while the vehicle is running.

[0027] The first ribs 54 may be provided intermittently, and the recesses 55 may be formed in the gaps between the first ribs 54 that are interrupted by the intermittence. In this case, the recesses 55 are automatically formed between the first ribs 54 that are adjacent in the X direction, which simplifies the configuration of the intake device 1. This improves the versatility and productivity of the intake device 1.

[0028] In this embodiment, a protrusion 59 that protrudes downward is provided at the bottom of the lower mounting hole 520 in the mounting flange 5. Therefore, by using the protrusion 59 as an auxiliary marker in addition to the recess 55, it becomes easier to effectively access the lower mounting hole 520 by feel without having to visually check it. This makes it possible to more effectively improve the ease of installation of the intake device 1.

[0029] In this embodiment, third ribs 57 are provided on the outer surface of the surge tank 3, each continuing toward the lower mounting hole 520. Therefore, by following each third rib 57, the lower mounting hole 520 can be easily and reliably accessed by feel. This makes it possible to more effectively improve the ease of installation of the intake device 1.

[0030] In this embodiment, the third rib 57 is formed by a first vertical rib 571 extending in the up-down direction (Y direction). This allows the third rib 57 to have a simple configuration, ensuring good productivity of the intake device 1, and enabling the third rib 57 to accurately guide the intake device 1 into the lower mounting hole 520 by feel.

[0031] 5, the third rib 57 can also be formed in the shape of a downward arrow by combining a first vertical rib 571 with a pair of diagonal ribs 573. With this configuration, the third rib 57 can improve the rigidity of the intake device 1, while the third rib 57 can accurately guide the intake device 1 into the lower mounting hole 520 by feel.

[0032] The present invention is not limited to the configurations exemplified in the above-described embodiments, but can be freely modified according to, for example, the specifications of the internal combustion engine to which the present invention is applied. [Explanation of symbols]

[0033] 1...Intake system 2...Cylinder head 21...Side 22...Intake port 3...Surge tank 4…Cooling device 5...Mounting flange 510...Upper mounting hole 520...Lower mounting hole 54...First Rib 55...recess 56...Second rib 57...Third rib 571...First vertical rib (vertical rib) 572...Second vertical rib (vertical rib) 573...Diagonal rib 6...Bolt (fastening member)

Claims

1. An intake device that is supported in a cantilevered manner so as to overhang a side of a cylinder head and is connected to an intake port that opens to the side of the cylinder head, a surge tank that guides intake air to the intake port; a cooling device interposed between the surge tank and the cylinder head, and configured to cool the intake air introduced through the surge tank by circulating a refrigerant therethrough; a mounting flange interposed between the cooling device and the cylinder head for mounting the cooling device to a side portion of the cylinder head; a plurality of upper and lower mounting holes provided on the upper and lower parts of the mounting flange, respectively, along the cylinder row direction of the cylinder head, with the cooling device sandwiched between them; a fastening member inserted through the upper mounting hole and the lower mounting hole to fasten the mounting flange to the cylinder head; a first rib formed integrally with the mounting flange so as to protrude downward, the first rib being provided continuously or intermittently in the cylinder row direction at a position offset from the lower mounting hole in the direction of the overhang, the first rib having a recessed portion recessed upward in a portion facing the lower mounting hole; Equipped with Intake system.

2. 2. The intake system of claim 1, a plurality of second ribs are provided between the mounting flange and the first rib, the second ribs connecting the mounting flange and the first rib; the first rib is provided continuously in the cylinder row direction so as to connect the second ribs adjacent to each other in the cylinder row direction, and both sides of the recess are connected in the cylinder row direction. Intake system.

3. 2. The intake system of claim 1, the first ribs are provided intermittently in the cylinder row direction, the recessed portion is formed between the first ribs adjacent to each other in the cylinder row direction, Intake system.

4. 2. The intake system of claim 1, The mounting flange has a protrusion that protrudes downward from a lower portion of the lower mounting hole. Intake system.

5. 2. The intake system of claim 1, a third rib extending toward the lower mounting hole is provided on the outer surface of the surge tank; Intake system.

6. 6. The intake system according to claim 5, The third rib is a vertical rib extending linearly along the up-down direction. Intake system.

7. 6. The intake system according to claim 5, The third rib is a vertical rib extending linearly downward toward the lower mounting hole; a pair of oblique ribs each obliquely extending downward toward the lower mounting hole and obliquely intersecting the longitudinal rib; Including, The vertical rib and the pair of diagonal ribs are combined to form a downward arrow shape. Intake system.

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