JP2016169618A - Intake manifold device - Google Patents

Abstract

To provide an intake manifold device capable of reducing the number of parts and the number of assembly steps. An intake manifold apparatus includes an intake manifold that is integrally injection-molded with a resin material. A housing 18 that houses the heat exchanger 14 in the intake manifold 12 opens in a direction orthogonal to the gas flow direction of the heat exchanger 14 and the arrangement direction of the plurality of branch pipes 30a to 30c. An opening 22 into which can be inserted is formed. The heat exchanger 14 is provided with a cover 40 that is attached to the intake manifold 12 with the opening 22 closed. [Selection] Figure 1

Description

  The present invention relates to an intake manifold device including an intake manifold that guides gas to a plurality of cylinder chambers of an internal combustion engine, and a heat exchanger that is built in the intake manifold and cools the gas.

  In this type of intake manifold device, the intake manifold includes, for example, a housing that houses the heat exchanger, an introduction portion that introduces gas to the heat exchanger, and a plurality of gases that guide the gas cooled by the heat exchanger to each cylinder chamber. And a derivation unit having a branch pipe. The housing is formed with an opening in which the heat exchanger can be inserted by opening in the direction in which the plurality of branch pipes are arranged (see, for example, Patent Document 1).

Special table 2014-515450 gazette

  In the technique described in Patent Document 1, when the intake manifold is injection-molded with a resin material, the opening is formed in the housing so as to open in the direction in which the plurality of branch pipes are arranged. It is not easy to injection mold.

  That is, since the mold for molding the inner surface of the housing and the mold for molding the inner surface of each branch pipe cannot be easily removed from the opening, for example, the housing, the introduction portion, and the lead-out portion are separately molded. The intake manifold is assembled by joining the members. Therefore, there exists a subject that a number of parts and an assembly man-hour increase.

  The present invention has been made in consideration of such problems, and an object thereof is to provide an intake manifold device that can reduce the number of parts and the number of assembly steps.

  In order to achieve the above object, an intake manifold apparatus according to the present invention includes an intake manifold that guides gas to a plurality of cylinder chambers of an internal combustion engine, and a heat exchanger that is built in the intake manifold and cools the gas. The intake manifold device includes an intake manifold that is integrally injection-molded with a resin material, a housing that houses the heat exchanger, an introduction portion that guides the gas into the housing, and the heat A plurality of branch pipes for guiding the gas cooled by the exchanger to the cylinder chambers, and the housing includes a gas flow direction of the heat exchanger and an arrangement direction of the plurality of branch pipes. An opening is formed in the direction orthogonal to the opening, and the heat exchanger can be inserted into the heat exchanger. The heat exchanger is attached to the intake manifold with the opening closed. Wherein the cover portion that is provided.

  According to such a structure, the metal mold | die which shape | molds the inner surface of a housing and the metal mold | die which shape | molds the inner surface of a branch pipe can be easily extracted from the opening part of a housing. Thereby, since the intake manifold can be integrally injection-molded with the resin material, the number of parts and the number of assembly steps can be reduced.

  In the intake manifold device described above, at least a part of each of the branch pipes may be formed to be curved and have a flow passage cross-sectional area that gradually decreases toward the upstream side.

  According to such a configuration, even when each branch pipe is formed in a curved shape, the mold for molding the inner surface of these branch pipes can be removed from the opening.

  In the intake manifold device, each branch pipe extends linearly from the housing, and the entire range of the flow path cross section of each branch pipe is located in the opening as viewed from the extending direction of the branch pipe. It may be formed so as to.

  According to such a structure, the metal mold | die which shape | molds the inner surface of a branch pipe can be easily extracted from an opening part.

  In the intake manifold device, the cover portion may be made of metal and fastened to the intake manifold with a plurality of mounting bolts.

  According to such a configuration, the heat exchanger can be easily fixed to the intake manifold.

  In the intake manifold device, the cover portion may include a metal cover portion main body and a resin member that is insert-molded to an outer edge portion of the cover portion main body and welded to the intake manifold. .

  According to such a configuration, since the cover portion can be welded to the intake manifold, the number of parts can be further reduced.

  In the above intake manifold device, the intake manifold includes a flange portion provided at a distal end portion of each branch pipe and fastened to a cylinder head by a plurality of fixing bolts. A notch may be formed on the axis of the bolt.

  According to such a configuration, a fastening tool such as a screwdriver can be easily guided to the fixing bolt. Thereby, the flange part of an intake manifold can be easily and reliably attached to a cylinder head.

  In the intake manifold device described above, an attachment surface that contacts the cover portion of the intake manifold may be located on the same plane.

  According to such a configuration, the shapes of the cover portion and the housing can be simplified, and the cover portion can be easily attached to the intake manifold.

  According to the present invention, the intake manifold is formed by forming in the housing an opening in which the heat exchanger can be inserted by opening in a direction orthogonal to the gas flow direction of the heat exchanger and the arrangement direction of the plurality of branch pipes. Since the injection molding can be performed integrally with the resin material, the number of parts and assembly man-hours of the intake manifold device can be reduced.

1A is a partial cross-sectional front view of the intake manifold device according to the first embodiment of the present invention, and FIG. 1B is a cross-sectional view taken along line IB-IB in FIG. 1A. It is a section explanatory view showing a metal mold which molds an intake manifold shown in Drawing 1A. 3A is a partial cross-sectional front view of an intake manifold device according to a second embodiment of the present invention, and FIG. 3B is a cross-sectional explanatory view showing a mold for forming the intake manifold shown in FIG. 3A. 4A is a front view of an intake manifold according to a third embodiment of the present invention, and FIG. 4B is a cross-sectional view taken along line IVB-IVB in FIG. 4A.

  Hereinafter, preferred embodiments of an intake manifold device according to the present invention will be described with reference to the accompanying drawings.

  The intake manifold device according to the present invention is applied to a multi-cylinder internal combustion engine mounted on a vehicle or the like, and cools gas compressed by a supercharger and guides it to a plurality of cylinder chambers. The gas led to the intake manifold device may be a gas led from the intake passage of the internal combustion engine, which may be a mixture of exhaust gas and air of the internal combustion engine, or air that does not contain exhaust gas. There may be.

(First embodiment)
As shown in FIGS. 1A and 1B, an intake manifold apparatus 10A according to the present embodiment includes an intake manifold 12 integrally injection-molded with a resin material, and a heat exchanger (intercooler) built in the intake manifold 12. 14. Although the resin material which comprises the intake manifold 12 is not specifically limited, For example, nylon 6 (trademark) or nylon 66 (trademark) etc. are mentioned.

  The intake manifold 12 is cooled by a tubular introduction portion 16 connected to an intake passage (not shown), a housing 18 that houses a heat exchanger 14 that cools the gas guided from the introduction portion 16, and the heat exchanger 14. And a lead-out portion 20 for guiding the gas to a plurality of cylinder chambers.

  The housing 18 has a box shape that extends along the extending direction (X direction) of the introduction portion 16 and is open on one side. That is, the housing 18 has an opening 22 into which the heat exchanger 14 can be inserted. The opening 22 is closed by a cover 40 described later provided in the heat exchanger 14.

  An upstream space 26 for guiding the gas guided from the introduction portion 16 to the heat exchanger 14 is formed on the upstream side of the heat exchanger 14 in the housing 18. A downstream space 28 for temporarily storing the gas cooled by the heat exchanger 14 is formed on the downstream side of the heat exchanger 14 in the housing 18. That is, the gas flows through the heat exchanger 14 in a direction (Y direction) from the upstream space 26 toward the downstream space 28.

  The lead-out part 20 straddles the three branch pipes 30a to 30c extending linearly from the housing 18 toward the opposite side (Z direction) to the opening part 22, and the leading ends of these branch pipes 30a to 30c. And a provided flange portion 32. Since the intake manifold device 10A according to the present embodiment is applied to a three-cylinder internal combustion engine, the number of branch pipes 30a to 30c is three. However, the number of branch pipes is appropriately changed according to the number of cylinders of the internal combustion engine. It goes without saying that it is possible.

  The three branch pipes 30 a to 30 c are arranged at equal intervals along the extending direction of the introduction portion 16, and the inner holes of the branch pipes 30 a to 30 c communicate with the downstream space 28. As for each branch pipe 30a-30c, the whole range of the flow-path cross section of each branch pipe 30a-30c is located in the opening part 22 seeing from the extension direction. A seal member (not shown) is attached to the distal end surfaces of the branch pipes 30a to 30c.

  The flange portion 32 is formed with four insertion holes 36a to 36d through which a fixing bolt 35 for fixing the lead-out portion 20 to a cylinder head (not shown) is inserted. Specifically, in the X direction, the insertion hole 36a is located on the opposite side of the branch pipe 30b with respect to the branch pipe 30a, and the insertion hole 36d is located on the opposite side of the branch pipe 30b with respect to the branch pipe 30c. ing. In the X direction, the insertion hole 36b is located between the branch pipe 30a and the branch pipe 30b, and the insertion hole 36c is located between the branch pipe 30b and the branch pipe 30c. Further, the insertion hole 36a and the insertion hole 36d are located closer to the introduction part 16 than the axis Ax of the branch pipes 30a to 30c, and the insertion hole 36b and the insertion hole 36c are introduction parts from the axis Ax of the branch pipes 30a to 30c. 16 is located on the opposite side.

  That is, the insertion hole 36a and the insertion hole 36b are in an axially symmetric position about the axis Ax of the branch pipe 30a, and the insertion hole 36c and the insertion hole 36d are in an axially symmetric position about the axis Ax of the branch pipe 30c. is there. As a result, the tightening force of the fixing bolt 35 can be applied to the entire sealing member provided on the front end surfaces of the branch pipes 30a and 30c substantially uniformly, so that the branch pipe 30a and the branch pipe 30c are attached to the cylinder head. Can be connected in an airtight manner.

  The branch pipe 30b located in the middle of the three branch pipes 30a to 30c is provided with a plate-like rib (reinforcing member) 38 on the side opposite to the side where the insertion holes 36b and 36c are located. . The rib 38 is provided integrally with the branch pipe 30 b and the housing 18. Thereby, even if the insertion hole 36b and the insertion hole 36c are not in an axially symmetric position around the axis Ax of the branch pipe 30b, the branch pipe 30b is connected to the cylinder head in an airtight manner by the action of the rib 38. can do.

  The heat exchanger 14 is made of a metal material such as aluminum and has a rectangular parallelepiped shape extending in the longitudinal direction of the housing 18. Although detailed illustration is omitted, the heat exchanger 14 is formed with a gas flow path through which a gas flows and a refrigerant flow path through which a refrigerant for cooling the gas flows. The gas flow path extends in the Y direction. Note that the refrigerant heated by heat exchange with the gas in the heat exchanger 14 is led to a refrigerant circulation passage (not shown) and radiated (cooled) by another heat exchanger, and then the refrigerant flow path of the heat exchanger 14. To be introduced.

  The heat exchanger 14 is integrally provided with a cover 40 that closes the opening 22 of the housing 18. The cover 40 is made of the same metal material as the heat exchanger 14 and is fastened to the intake manifold 12 by a plurality of mounting bolts 42. Thereby, the heat exchanger 14 can be easily fixed to the intake manifold 12.

  Moreover, the cover part 40 is formed in flat form. That is, the mounting surface that contacts the cover portion 40 of the housing 18 is located on the same plane. Thereby, the shapes of the cover part 40 and the housing 18 can be simplified, and the cover part 40 can be easily attached to the intake manifold 12.

  The cover portion 40 is formed with a notch 44 on the axis of the fixing bolt 35 (on the center line of the insertion holes 36a to 36d). Thereby, a fastening tool such as a screwdriver can be easily guided to the head of the fixing bolt 35. Therefore, the flange portion 32 of the intake manifold 12 can be easily and reliably attached to the cylinder head.

  The intake manifold device 10A according to the present embodiment is basically configured as described above. Next, operational effects of the intake manifold device 10A will be described.

  In the present embodiment, the housing 18 is opened in a direction (Z direction) orthogonal to the gas flow direction of the heat exchanger 14 and the arrangement direction of the branch pipes 30a to 30c, and the heat exchanger 14 can be inserted into the housing 18. A portion 22 is formed. Each branch pipe 30a to 30c extends linearly from the housing 18 in the Z direction, and the entire range of the flow path cross section of each branch pipe 30a to 30c is opened as viewed from the extending direction of the branch pipes 30a to 30c. It is formed so as to be located in the portion 22.

  In this case, as shown in FIG. 2, the inner surface of the housing 18 and the inner surfaces of the branch pipes 30 a to 30 c can be formed by one mold 100 and the mold 100 can be easily formed through the opening 22 of the housing 18. Can be pulled out. The outer surface of the intake manifold 12 is formed by a plurality of molds 102, 104, and 106, and the inner surface of the introduction portion 16 is formed by a mold (not shown). Thus, since the intake manifold 12 can be integrally injection-molded with a resin material, the number of parts and the number of assembly steps can be reduced.

(Second Embodiment)
Next, the intake manifold device 10B according to the second embodiment will be described. Note that in the intake manifold device 10B according to the second embodiment, the same components as those in the intake manifold device 10A according to the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. The same applies to an intake manifold device 10C according to a third embodiment described later.

  As shown in FIGS. 3A and 3B, the intake manifold device 10 </ b> B according to this embodiment includes an intake manifold 50. The lead-out portion 52 constituting the intake manifold 50 includes three branch pipes 54a to 54c extending from the vicinity of the opening 22 in the housing 18 to the side opposite to the side where the introduction section 16 is located, and these branch pipes 54a. ˜54c and a flange portion 32 provided across the tip portion.

  Each of the branch pipes 54a to 54c is curved toward the side opposite to the side where the opening 22 is located toward the tip. Moreover, each branch pipe 54a-54c is formed so that the flow-path cross-sectional area may become small gradually toward the upstream (front end side) over the full length.

  In the present embodiment, for example, the base end side of the inner surface of each branch pipe 54 a to 54 c can be formed by the slide mold 110 and the front end side of the inner surface of each branch pipe 54 a to 54 c can be formed by the mold 112. The slide mold 110 can be accommodated in a recess 116 formed in a mold 114 that molds the inner surface of the housing 18. Note that the outer surface of the intake manifold 50 is formed by, for example, molds 112, 114, and 118.

  According to such a configuration, the mold 114 can be removed from the opening 22 of the housing 18 in a state where the slide mold 110 is accommodated in the recess 116, and therefore the intake manifold 50 is integrally injection-molded with the resin material. be able to. Therefore, the number of parts and the number of assembly steps can be reduced. In addition, this embodiment is not limited to the structure mentioned above. For example, each of the branch pipes 54a to 54c may be formed so that the flow path cross-sectional area gradually decreases toward the upstream side in a part thereof. Even in this case, the mold 114 can be removed from the opening 22 of the housing 18 with the slide mold 110 accommodated in the recess 116.

(Third embodiment)
Next, an intake manifold device 10C according to the third embodiment will be described. As shown in FIGS. 4A and 4B, the intake manifold device 10C according to the present embodiment includes an intake manifold 60 and a cover 62. The intake manifold 60 includes an introduction portion 16, a housing 66 in which an annular recess 64 is formed on the outer peripheral side of the opening 22, and a lead-out portion 20. However, the intake manifold 60 may have the lead-out portion 52 described above.

  The cover part 62 includes a metal cover part main body 68 that is provided integrally with the heat exchanger 14 and closes the opening 22, and a resin member 70 that is insert-molded on the outer edge of the cover part main body 68. ing. The resin member 70 is formed with an annular protrusion 72 that is inserted into the annular recess 64.

  In this case, the cover part 62 can be fixed to the intake manifold 60 by inserting the annular convex part 72 of the cover part 62 into the annular concave part 64 of the intake manifold 60 and vibration welding them together. Thereby, the number of parts can be reduced.

10A to 10C: Intake manifold device 12, 50, 60 ... Intake manifold 14 ... Heat exchanger 16 ... Introducing portion 18 ... Housing 20, 52 ... Deriving portion 22 ... Openings 30a-30c, 54a-54c ... Branch pipes 40, 62 ... Cover part

Claims (7)

An intake manifold apparatus comprising: an intake manifold that guides gas to a plurality of cylinder chambers of an internal combustion engine; and a heat exchanger that is built in the intake manifold and cools the gas,
The intake manifold is integrally injection-molded with a resin material,
A housing that houses the heat exchanger;
An introduction for directing the gas into the housing;
A plurality of branch pipes for guiding the gas cooled by the heat exchanger to each of the cylinder chambers,
The housing is formed with an opening into which the heat exchanger can be inserted by opening in a direction orthogonal to the gas flow direction of the heat exchanger and the arrangement direction of the plurality of branch pipes,
An intake manifold apparatus, wherein the heat exchanger is provided with a cover portion attached to the intake manifold in a state where the opening is closed. The intake manifold device according to claim 1, wherein
An intake manifold apparatus, wherein at least a part of each branch pipe is curved and has a flow passage cross-sectional area that gradually decreases toward an upstream side. The intake manifold device according to claim 1, wherein
Each of the branch pipes extends linearly from the housing, and is formed so that the entire range of the flow path cross section of each branch pipe is located in the opening as viewed from the extending direction of the branch pipe. An intake manifold device characterized by that. In the intake manifold device according to any one of claims 1 to 3,
The intake manifold device, wherein the cover portion is made of metal and fastened to the intake manifold by a plurality of mounting bolts. In the intake manifold device according to any one of claims 1 to 3,
The cover part is
A metal cover body,
An intake manifold device comprising: a resin member that is insert-molded at an outer edge of the cover body and welded to the intake manifold. In the intake manifold device according to claim 1 or 3,
The intake manifold has a flange portion that is provided at the tip of each branch pipe and is fastened to the cylinder head by a plurality of fixing bolts,
The intake manifold device according to claim 1, wherein the cover portion has a notch formed on an axis of the fixing bolt. In the intake manifold device according to any one of claims 1 to 6,
The intake manifold device, wherein an attachment surface that contacts the cover portion of the intake manifold is located on the same plane.

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