JP2012215132A - Intake manifold for internal combustion engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To arrange piping by utilizing a space between a plurality of branch pipes.SOLUTION: An intake manifold 10 has a plurality of first to fourth branch pipes 12a to 12d, while, in between the first branch pipe 12a and a second branch pipe 12b, a bridging part 26 that connects the cover members 18 of branch pipe covers 22 mounted on a body 20 is formed. The bridging part 26 has a holder 32 mounted thereon which can hold a pipe 30. The pipe 30 is held at the gripping part 44 of the holder 32, while it is kept inside the space 52 provided between the first branch pipe 12a and the second branch pipe 12b.

Description

  The present invention relates to an intake manifold for an internal combustion engine having a plurality of branch pipes for supplying air to the internal combustion engine.

  The present applicant has proposed an intake manifold that is connected to an internal combustion engine mounted on a vehicle and can supply air to each cylinder chamber of the internal combustion engine (see Patent Document 1). The intake manifold includes a plurality of branch pipes connected to each cylinder of the internal combustion engine, and a surge tank to which each branch pipe is connected and supplied with air, and the surge is supplied from an intake inlet pipe formed in the surge tank. After air is introduced into the tank, it is distributed to each branch pipe and supplied to each cylinder chamber of the internal combustion engine.

JP 2002-364470 A

  The present invention has been made in connection with the above proposal, and an object of the present invention is to provide an intake manifold for an internal combustion engine in which piping can be arranged using spaces between a plurality of branch pipes.

To achieve the above object, the present invention provides an internal combustion engine comprising a plurality of branch pipes connected to each cylinder of an internal combustion engine, and a surge tank to which the branch pipes are connected and air is introduced from a throttle device. In the intake manifold for engines,
The branch pipes are spaced apart from each other in parallel, and a space defined between the branch pipes is provided with a pipe through which a fluid flows.

  According to the present invention, in an intake manifold for an internal combustion engine having a plurality of branch pipes, a pipe through which a fluid flows is provided in the space between the branch pipes provided in parallel and spaced apart from each other.

  Therefore, by providing piping in the space provided between the adjacent branch pipes, the space that is a dead space can be effectively utilized, and accordingly, the intake manifold for the internal combustion engine is used in the engine room. It is possible to reduce the volume occupied in the interior.

  Moreover, it is good to arrange | position piping so that it may be arrange | positioned in parallel with a branch pipe and it may overlap with the said branch pipe along a parallel direction.

  Furthermore, it is good to provide the bridge | crosslinking part which connects branch pipes in space, and hold | maintain piping with respect to the said bridge | crosslinking part.

  Furthermore, the branch pipe includes a main body portion connected to the surge tank and the internal combustion engine main body, and a cover member attached to an opening portion opened to a side of the main body portion, and the bridging portion includes the cover. It may be provided on the member.

  Furthermore, a holder for holding the pipe may be attached to the bridging portion.

  Further, the holder may be provided with a pipe holding part that has elasticity and can hold the pipe.

  According to the present invention, the following effects can be obtained.

  That is, in an intake manifold for an internal combustion engine having a plurality of branch pipes, a pipe through which a fluid flows is provided in the space between the branch pipes that are spaced apart from each other in parallel. The space that is a dead space can be effectively used, and accordingly, the volume occupied by the intake manifold for the internal combustion engine in the engine room can be reduced.

1 is an external perspective view of an intake manifold for an internal combustion engine according to an embodiment of the present invention. FIG. 2 is a front view of a branch pipe cover of the intake manifold for the internal combustion engine shown in FIG. 1. It is a single-piece | unit perspective view which shows the holder with which the branch pipe cover of FIG. 2 was mounted | worn. 4A is an enlarged front view showing the vicinity of the holder in FIG. 1, and FIG. 4B is an enlarged side view showing the vicinity of the holder in FIG. 4A.

  A preferred embodiment of an intake manifold for an internal combustion engine according to the present invention will be given and described in detail below with reference to the accompanying drawings.

  In FIG. 1, reference numeral 10 indicates an intake manifold for an internal combustion engine according to an embodiment of the present invention.

  The intake manifold for internal combustion engine (hereinafter referred to as intake manifold 10) is provided in, for example, a four-cylinder internal combustion engine having four cylinder chambers mounted on a vehicle or the like.

  As shown in FIG. 1, the intake manifold 10 is made of, for example, a resin material, and includes a plurality of first to fourth branch pipes 12 a to 12 d and one ends of the first to fourth branch pipes 12 a to 12 d. Are attached so as to cover the surge tank 14, the surge tank 14 to which each part is connected, the suction connection part 16 provided at one end along the longitudinal direction (arrow A, B direction) of the surge tank 14, and Cover member 18.

  The first to fourth branch pipes 12a to 12d are arranged in parallel at equal intervals along the longitudinal direction (arrow A, B direction) of the surge tank 14, and from one end to the other end. It is formed in a curved shape. The first to fourth branch pipes 12 a to 12 d include a main body 20 connected to the surge tank 14 and a branch pipe cover 22 that closes an opening opened to the side of the main body 20. One end of each of the first to fourth branch pipes 12a to 12d is connected to and communicates with the surge tank 14, and the other end is connected to a cylinder head of an internal combustion engine (not shown).

  As shown in FIGS. 1, 2, and 4, the branch pipe cover 22 includes a plurality of cover parts 24 provided to close the openings of the first to fourth branch pipes 12 a to 12 d, and the cover part. It consists of the bridge | crosslinking part 26 which connects 24 mutually. The cover portion 24 is provided in parallel with a predetermined distance from each other in the same manner as the main body portion 20, and a bridging portion 26 is provided so as to hold the cover portion 24 in parallel. The bridging portion 26 is formed so as to be orthogonal to the extending direction of the cover portion 24, is formed with a predetermined width dimension, and is provided in the cover portion 24 in the vicinity of the joint portion with the main body portion 20.

  The bridging portion 26 that connects the cover portion 24 attached to the first branch pipe 12a and the cover portion 24 attached to the second branch pipe 12b has main bodies of the first and second branch pipes 12a and 12b. A pedestal portion 28 bulging in a direction away from the portion 20 is formed, and a holder 32 capable of holding the pipe 30 is attached to the pedestal portion 28.

  The pedestal portion 28 includes a mounting surface 34 that extends in the vertical direction when the intake manifold 10 is mounted on an internal combustion engine (not shown), and a rectangular hole 36 that opens substantially at the center of the mounting surface 34. As shown in FIG. 4B, the pedestal portion 28 is provided at a position where the cover portion 24 does not protrude outward with respect to the top portion 38 that protrudes most away from the surge tank 14.

  As shown in FIGS. 1 to 4, the holder 32 includes a base portion 40 that contacts the pedestal portion 28, an insertion portion 42 that protrudes from the base portion 40 and is inserted into the hole portion 36, It consists of a holding part (pipe holding part) 44 that protrudes in the opposite direction to the insertion part 42 and holds the pipe 30. The base portion 40 is formed in a plate shape having a circular cross section, and an insertion portion 42 having a rectangular cross section is provided at the center of one side surface thereof. On the side surface of the insertion portion 42, a pair of hooks 46 projecting outward and elastically deforming inward are provided.

  The holding part 44 is formed in a circular arc shape corresponding to the cross-sectional shape of the pipe 30, and the opening part 48 opens in a direction away from the base part 40, and the opening width of the opening part 48 is the diameter of the pipe 30. It is formed to be narrower.

  Similarly to the hook 46, the holding portion 44 has elasticity that can be deformed in the radial direction, and when the pipe 30 is inserted into the inside through the opening 48, the holding portion 44 is inserted while expanding the opening 48. To do.

  The holder 32 is engaged with the mounting surface 34 of the pedestal portion 28 by inserting the insertion portion 42 into the hole 36 of the pedestal portion 28, and the base portion 40 is attached to the mounting portion 34 of the pedestal portion 28. While being held in contact with the surface 34, the holding portion 44 is disposed in a direction away from the pedestal portion 28. At this time, the holding portion 44 does not protrude outward with respect to the top portion 38 that protrudes in the direction farthest from the surge tank 14 in the cover portion 24.

  The pipe 30 held by the holder 32 is connected, for example, between the connecting portion 50 of the cover member 18 and a cylinder head (not shown) of the internal combustion engine, and the gas accumulated in the cylinder head is the pipe. 30 circulates through the first to fourth branch pipes 12a to 12d through 30, and is again supplied to each cylinder chamber and combusted. That is, one end of the pipe 30 is connected to the connecting part 50 of the cover member 18, the other end is connected to the cylinder head, and the middle is held by the holder 32.

  At this time, the pipe 30 is restricted by the holder 32 so that the intermediate path is between the first branch pipe 12a and the second branch pipe 12b, and the tops of the first and second branch pipes 12a and 12b. 38 is held at a position where it does not protrude outward. Therefore, the piping 30 is protected by avoiding contact with other members provided around the intake manifold 10 in the space 52 between the first branch pipe 12a and the second branch pipe 12b.

  Further, by arranging the pipe 30 in the space 52 which is a dead space between the first branch pipe 12a and the second branch pipe 12b, the engine room of the vehicle on which the internal combustion engine including the intake manifold 10 is mounted. The space inside can be used effectively.

  The intake manifold 10 for an internal combustion engine according to the embodiment of the present invention is basically configured as described above. Next, the operation and effects thereof will be described.

  First, air flows from the suction connection portion 16 to the surge tank 14 with the intake action of each cylinder chamber in the internal combustion engine, and is distributed to the first to fourth branch pipes 12a to 12d in the surge tank 14, respectively. The The air supplied to the first to fourth branch pipes 12a to 12d is sequentially supplied into each cylinder through the cylinder head of the internal combustion engine.

  Further, the gas that has moved from each cylinder chamber of the internal combustion engine to the cylinder head is supplied from the connection portion 50 of the cover member 18 to the first to fourth branch pipes 12a to 12d through the pipe 30, and then to each cylinder chamber. And will be introduced again.

  As described above, in the present embodiment, the pipe 30 is arranged using the space 52 provided between the plurality of first and second branch pipes 12a and 12b, and the first to fourth branches are provided. It becomes possible to fix with the holder 32 with respect to the branch pipe cover 22 which comprises the pipes 12a-12d. Therefore, it is not necessary to separately provide a fixing bracket for fixing the pipe 30, the number of components constituting the internal combustion engine can be reduced, and the space in the limited engine room can be effectively used. It becomes.

  Further, the branch pipe cover 22 constituting the first to fourth branch pipes 12a to 12d is provided with a bridging portion 26, and the pipe 30 is connected between the first and second branch pipes 12a and 12b using the bridging portion 26. Therefore, the shape of the main body 20 in the first to fourth branch pipes 12a to 12d is not complicated, and the surge tank 14 formed integrally with the main body 20 etc. It is possible to easily manufacture the intake manifold 10 including the.

  Furthermore, by configuring the holder 32 as a separate body that is detachable from the bridging portion 26 of the intake manifold 10, the shape of the branch pipe cover 22 including the bridging portion 26 can be simplified. The branch tube cover 22 can be easily manufactured.

  Furthermore, since the holder 32 includes the holding portion 44 having elasticity, the pipe 30 can be reliably and easily held, and its manufacture is also easy and suitable.

  In the intake manifold 10 described above, the holder 30 is provided in the bridging portion 26 that connects the first branch pipe 12a and the second branch pipe 12b, and the pipe 30 can be held. The holder 32 may be provided by forming the pedestal portion 28 in any one of the plurality of bridging portions 26, and the holder 32 may be provided for each of the plural bridging portions 26. The plurality of pipes 30 may be held by the holders 32.

  In the above-described intake manifold 10, the configuration in which the holder 32 is detachably provided with respect to the pedestal portion 28 formed in the bridging portion 26 has been described. However, the present invention is not limited to this. A holding portion capable of holding the pipe 30 with respect to the portion 26 may be integrally formed, or the holding portion may be directly formed with respect to the cover portion 24 instead of the bridging portion 26. This eliminates the need for the holder 32 provided as a separate member, which can reduce the number of parts and eliminates the need for assembling work for assembling the holder 32, thereby assembling the intake manifold 10. Can be improved.

  In addition, the holder 32 is not limited to the case having the holding portion 44 having an arcuate cross section. A pair of opened walls may be provided, and the pipe 30 may be inserted between the walls to maintain the pipe 30 in the space 52 between the first to fourth branch pipes 12a to 12d. .

  Further, the configuration in which the pipe 30 is connected to the first to fourth branch pipes 12a to 12d has been described. However, the present invention is not limited to this. For example, the pipe 30 is connected to the suction connection portion 16 or the surge tank. 14 may be connected.

  Of course, the intake manifold for an internal combustion engine according to the present invention is not limited to the above-described embodiment, and various configurations can be adopted without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 10 ... Intake manifold for internal combustion engines 12a ... 1st branch pipe 12b ... 2nd branch pipe 12c ... 3rd branch pipe 12d ... 4th branch pipe 14 ... Surge tank 18 ... Cover member 20 ... Main-body part 22 ... Branch pipe cover 24 ... Cover part 26 ... Bridge part 28 ... Pedestal part 30 ... Piping 32 ... Holder 34 ... Mounting surface 36 ... Hole part 42 ... Insertion part 44 ... Holding part 50 ... Connection part 52 ... Space

Claims (6)

In an intake manifold for an internal combustion engine comprising a plurality of branch pipes connected to each cylinder of the internal combustion engine, and a surge tank to which the branch pipe is connected and air is introduced from a throttle device,
An intake manifold for an internal combustion engine, wherein the branch pipes are provided apart from each other in parallel, and a pipe through which a fluid flows is provided in a space defined between the branch pipes. The intake manifold for an internal combustion engine according to claim 1,
The intake manifold for an internal combustion engine, wherein the pipe is arranged in parallel with the branch pipe and is arranged to overlap the branch pipe along a parallel direction. The intake manifold for an internal combustion engine according to claim 1 or 2,
An intake manifold for an internal combustion engine, wherein the space is provided with a bridging portion for connecting the branch pipes to each other, and the pipe is held with respect to the bridging portion. The intake manifold for an internal combustion engine according to claim 3,
The branch pipe is a main body connected to the surge tank and the internal combustion engine main body,
A cover member attached to an opening that opens to the side of the main body,
With
An intake manifold for an internal combustion engine, wherein the bridging portion is provided in the cover member. The intake manifold for an internal combustion engine according to claim 3 or 4,
An intake manifold for an internal combustion engine, wherein a holder for holding the pipe is attached to the bridging portion. The intake manifold for an internal combustion engine according to claim 5,
The intake manifold for an internal combustion engine, wherein the holder includes a pipe holding portion that has elasticity and can hold the pipe.

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