JPH11117819A - Resinous intake manifold - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the manufacturing cost of a resinous intake manifold by limiting an increase in the number of its components and its assembling processes. SOLUTION: An intake manifold comprises intake manifold components 11 and 21. The component 11 is formed in its storage part 16 with partition walls 17 and 18 that extend from either internal face to the middle. Both these walls 17 and 18 define a surge tank part 13 and a resonator part 14 and also form a communicating pipe part 15 therebetween by their opposed faces. The component 21 is also formed in its storage part 26 with a pair of partition walls that correspond to these walls 17 and 18. In welding these components 11 and 21 together under vibration, the walls 17 and 18 are also welded to their corresponding walls to define a surge tank, a resonator and a communicating pipe simultaneously.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to reduction of intake noise,
The present invention relates to a resin intake manifold having a built-in resonator for removing a tapping sound generated in a surge tank and for increasing a torque of an internal combustion engine.

[0002]

2. Description of the Related Art It is known to provide a resonator at the antinode of air column vibration generated in a single pipe or duct to reduce air column vibration noise. An internal combustion engine has also been proposed in which an intake system is provided with a resonator for reducing air column vibration noise to reduce intake noise.

FIG. 8 shows a conventional intake manifold with a resonator. The intake manifold 51 and the resonator 56 are provided separately. The intake manifold 51 includes a surge tank 52, a plurality of distribution pipes 53, and an intake port plate. The surge tank 52 and the resonator 56 are connected to a connection hose 5 fitted to a connection 52a of the surge tank 52 and a connection 56a of the resonator 56.
7 are connected. Both ends of the connecting hose 57 are connected by connecting parts 52a,
56a.

Accordingly, air taken in from an outside air intake port (not shown) provided in the vehicle is guided to the surge tank 52 from an air cleaner, a throttle body and the like. At this time, the intake noise generated in the surge tank 52 is reduced by the resonator 56, and the pulsation of the intake air is smoothed by the resonator 56.
The air introduced into the surge tank 52 is sent from the distribution pipe 53 to each combustion chamber (not shown) of the internal combustion engine.

[0005]

However, in the intake manifold with a resonator shown in FIG. 8, the intake manifold 51, the resonator 56, and the connecting hose 5 are provided.
7, parts such as the clamps 58 and 59 are required, and the number of parts increases, and the number of assembling operations increases, resulting in a problem that manufacturing costs increase.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to suppress the increase in the number of parts and the number of assembling work steps, and to reduce the manufacturing cost. An object of the present invention is to provide a resin intake manifold having a built-in intake manifold.

[0007]

According to a first aspect of the present invention, at least one of two divided members made of a resin material has a housing portion for forming a surge tank. The two divided bodies each have a welded part on each divided surface, and are resin intake manifolds integrally formed by vibration welding in which the respective welded parts are abutted with each other. The housing part includes a surge tank part and a resonator part. The gist of the present invention is to provide a pair of partition walls for defining a communication pipe section for communicating the surge tank section and the resonator section with each other.

According to this structure, when the welded portions of the two divided bodies are butted and joined together by vibration welding, the partition wall is also welded, and the surge tank, the resonator and the communication pipe are simultaneously formed.

According to a second aspect of the present invention, in the resin intake manifold according to the first aspect, a plurality of pairs of partition walls are provided, and each pair of partition walls constitute a plurality of resonator sections and a plurality of communication pipe sections. The main point is to do.

According to this structure, when the welded portions of the two divided bodies are joined together by vibration welding, the partition walls and the opposing walls are also welded to form a surge tank. Are formed at the same time.

[0011] The invention described in claim 3 is the invention according to claim 1 or 2.
In the invention described in (1), the gist is that the pair of partition walls extends in different directions from the inner peripheral surface of the housing portion and has an opposing portion for forming a communication pipe portion on an intermediate portion side thereof. .

According to a fourth aspect of the present invention, in the resin intake manifold according to the third aspect, the paired partition walls are provided in a plane or a curved surface, and are opposed to each other at an intermediate portion thereof. It is the gist that is provided in.

According to this configuration, the length or the cross-sectional area of the communicating pipe is changed by changing the length or the position of the pair of partition walls. As a result, the intake sound of a desired frequency can be reduced.

According to a fifth aspect of the present invention, in the resin intake manifold according to the third aspect, at least one of the paired partition walls forms an opposing portion with the other partition wall at an intermediate portion thereof. The gist is to be bent.

According to this configuration, by changing the length or the position of the facing portion, the length or the cross-sectional area of the communication pipe is changed, and it is possible to reduce the intake sound of a desired frequency.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION

(First Embodiment) A first embodiment of a resin intake manifold according to the present invention will be described below with reference to FIGS.

As shown in FIG. 1, a resin intake manifold 1 according to this embodiment is for a four-cylinder engine. 1 is a front view of a resin intake manifold, FIG. 2 is a bottom view thereof, FIG. 3 is an exploded perspective view seen from the bottom, FIG. 4 is a sectional view taken along line AA of FIG. 2, and FIG. FIG.

The intake manifold 1 is formed of a thermoplastic resin, and has a mounting plate 2, an air connector 3,
It has a surge tank 4, a resonator 5, a communication pipe 6, a distribution pipe 7, and an intake port plate 8.

The mounting plate 2 is a portion connected to an upstream part (not shown) of an intake passage such as a throttle body on which a throttle valve is pivotally supported. The mounting plate 2 is connected to a surge tank via an air connector 3. 4 is connected. Four distribution pipes 7 are connected to the surge tank 4, and the end of each distribution pipe 7 is fixed to an intake port plate 8 having intake port holes 9 (FIG. 2) arranged at equal intervals. I have. And the intake port plate 8 is an intake port (not shown).
Is connected to a combustion chamber (not shown) of the engine.

As shown in FIG. 4, a resonator 5 is provided integrally with a side of the surge tank 4 via a communication pipe 6. Therefore, the air taken in from an outside air intake (not shown) provided in the vehicle is guided to the surge tank 4 through the air connector 3 from an air cleaner, a throttle body, or the like. The air introduced into the surge tank 4 is sent from the distribution pipe 7 to each combustion chamber (not shown). Further, since the surge tank 4 is communicated with the resonator 5 through the communication pipe 6, the intake noise generated in the surge tank 4 is reduced by the resonator 5, and the pulsation of the intake air is smoothed by the resonator 5. .

As shown in FIG. 3, the intake manifold 1 is an intake manifold component 1 which is divided into two parts by a joining surface 10 as a welded portion.
1 and 21. Ribs (welding ribs) 12, 22 are formed on the outer peripheral edges of the joint surfaces 10a, 10b of the two parts 11, 21 respectively.

The intake manifold component 11 comprises a storage section 16 for forming the surge tank 4, the resonator 5, and the communication pipe 6, and a distribution pipe section 7a for forming the distribution pipe 7. The intake manifold component 21 includes a storage section 26 for forming the surge tank 4, the resonator 5, and the communication pipe 6, and a distribution pipe section 7b for forming the distribution pipe 7. The air connector 3 is provided in the housing section 26, and the intake port plate 8 is provided at the end of the distribution pipe section 7b.

As shown in FIGS. 3 and 5, the housing portion 16 of the intake manifold component 11 is provided with a pair of partition walls 17, 18 extending from the inner peripheral surface of the housing portion 16 to an intermediate portion. The two partition walls 17 and 18 are provided in a plane and extend so as to face each other in different directions. The surge tank 13 and the resonator 14 are defined in the housing 16 by the partition walls 17 and 18. In addition, a communicating pipe portion 15 is formed by the opposing portions of the partition walls 17 and 18.

As shown in FIG. 4, a pair of partition walls 27 and 88 are provided in the accommodation portion 26 of the intake manifold component 21 so as to correspond to the partition walls 17 and 18. The partition walls 27 and 28 are also provided in a flat plate shape, and extend so as to face each other in different directions.
As shown in FIG. 3, the surge tank 23 and the resonator 24 are defined in the housing 26 by the partition walls 27 and 28, and the communication pipe 25 is formed by the opposing portions of the partition walls 27 and 28. ing.

Then, the intake manifold component 1
When joining 1,21, they are brought into contact so that joining surfaces 10a and 10b correspond. Next, the ribs 12 and 22 are directly pressed by a welding jig to apply a load in a direction perpendicular to the joint surface 10. Then, in this state, vibration is applied to the joint surface 10 in the horizontal direction.

Thus, the intake manifold component 1
When a load and vibration are applied to the joining surfaces 10a and 10b of the first and twenty first welding portions 12, the welding ribs 12 and 22 are melted and welded to each other by the friction. Thus, intake manifold 1
Are joined together. At this time, the partition walls 17 and 18 are also welded to the partition walls 27 and 28, respectively, and the surge tank 4, the resonator 5, and the communication pipe 6 are simultaneously formed.

Incidentally, in this embodiment, the length of the opposing portions of the partition walls 17 and 18 is L, the sectional area of the communication pipe 6 is S, the volume of the resonator 5 is V, the resonance frequency is f, and the sound speed is C. Then

[0028]

## EQU1 ## The intake sound of f = (S · L ⁻¹ · V ⁻¹ ) ^1/2 · C / π can be reduced.

As described above, the resin intake manifold 1 according to the present embodiment configured as described above has the following effects. A pair of partition walls 17, 18 in the accommodation portion 16 of the intake manifold component 11;
Are provided, and a pair of partition walls 27 and 28 are provided in the accommodation portion 26 of the intake manifold component 21. When the intake manifold components 11 and 21 are welded by vibration, the partition walls 17 and 18 and the partition walls 27 and 28 are respectively formed. By welding, the surge tank 4, the resonator 5, and the communication pipe 6 were simultaneously formed. For this reason, it is possible to suppress an increase in the number of parts and an increase in the number of assembling work steps, thereby reducing a manufacturing cost.

· Intake manifold parts 11, 21
Partition walls 17, 18 formed in the accommodating portions 16, 26,
The resonance frequency f of the intake sound can be changed by changing the lengths and positions of 27 and 28.

(Second Embodiment) Hereinafter, a resin intake manifold according to a second embodiment will be described with reference to FIG.
For convenience of description, the same components as those in FIG. 5 are denoted by the same reference numerals, and the description thereof is partially omitted.

FIG. 6 shows one intake manifold component 30 of two intake manifold components constituting the intake manifold. The storage portion 16 of the intake manifold component 30 is provided with partition walls 35, 36, and 37 extending from the inner peripheral surface of the storage portion 16 to an intermediate portion. The partition walls 35 and 36 are provided in a plane.
The partition wall 37 has a partition wall 35, 3 on the intermediate side.
6 are bent so as to form opposed portions.

Therefore, the partition walls 35 and 37 form a pair,
The partition walls 36 and 37 also make a pair. Both partition walls 35, 37
The surge tank section 13 and the first resonator section 31 are partitioned by the housing section 16, and both partition walls 35,
A first communication pipe portion 33 is formed by the facing portion of 37. Further, the housing portion 16 is formed by the two partition walls 36 and 37.
Further, a second resonator section 32 is defined therein, and a second communication pipe section 34 is formed by the opposing portions of the partition walls 35 and 37.

The other intake manifold component of the intake manifold component 30 is also provided with partition walls corresponding to the partition walls 35, 36, and 37, respectively.

Also in this embodiment, at the time of vibration welding of the intake manifold, the partition walls 35 to 37 are also welded to the corresponding partition walls, and the surge tank and
The first and second resonators and the first and second communication tubes are formed simultaneously.

Incidentally, in the present embodiment, the length of the opposing portions of the partition walls 35 and 37 is L1, the sectional area of the communication pipe formed by the communication pipe section 33 is S1, and the length of the communication pipe formed by the first resonator section 31 is S1. The volume of one resonator is V1
And the resonance frequency is f1 and the sound speed is C,

[0037]

[Number 2] ^{f1 = (S1 · L1 -1 ·} V1 -1) can be reduced intake noise of ^1/2 · C / ^π.

The length of the opposing portions of the partition walls 36 and 37 is L2, the sectional area of the communication pipe formed by the communication pipe section 34 is S2, and the volume of the second resonator formed by the first resonator section 32 is L2. V2, the resonance frequency is f2,
If the speed of sound is C,

[0039]

## EQU3 ## The intake noise of f2 = (S2 · L2 ⁻¹ · V2 ⁻¹ ) can be reduced.

As described above, according to the resin intake manifold of the present embodiment configured as described above, the following effects can be obtained. -Two pairs of partition walls 35, 36 and 37 are provided in the housing part 16 of the intake manifold component 30, and when the intake manifold component 30 is welded by vibration, the surge tank, the resonator, and the communication pipe are formed simultaneously. Therefore, similarly to the intake manifold of the first embodiment, an increase in the number of parts can be suppressed, and an increase in the number of assembling work steps can be suppressed, thereby reducing the manufacturing cost.

In the present embodiment, the partition walls 35, 3 formed in the housing portion 16 of the intake manifold component 30
The resonance frequencies f1 and f2 can be made different by changing the lengths and positions of the 6, 6 and 37, and the intake sound of different frequencies can be reduced.

(Third Embodiment) Hereinafter, a resin intake manifold according to a third embodiment will be described with reference to FIG.
For convenience of description, the same components as those in FIG. 5 are denoted by the same reference numerals, and the description thereof is partially omitted.

FIG. 7 shows one of the two intake manifold components 40 constituting the intake manifold. The storage portion 16 of the intake manifold component 40 is provided with partition walls 41 and 42 extending from the inner peripheral surface of the storage portion 16 to an intermediate portion.
The partition walls 41 and 42 extend from opposed inner peripheral surfaces of the housing 16. Opposing walls 43, 44 that intersect with the partition walls 41, 42 and that oppose each other are formed on the intermediate side of the partition walls 41, 42. And both partition walls 4
1, 42, the surge tank 13,
The resonator unit 14 is partitioned. In addition, both opposing walls 4
The communication pipe portion 15 is formed by 3 and 44.

Note that the other intake manifold component of the intake manifold component 40 is also provided with partition walls corresponding to the partition walls 41 and 42, respectively. Also in this embodiment, at the time of vibration welding of the intake manifold, the partition walls 41 and 42 are also welded to the corresponding partition walls, and the surge tank, the resonator, and the communication pipe are simultaneously formed.

As described above, according to the resin intake manifold of the present embodiment configured as described above, the following effects can be obtained. A pair of partition walls 41, 42 are provided in the housing portion 16 of the intake manifold component 40, and opposing walls 43, 44 are provided in the middle of the partition walls 41, 42 so as to intersect the partition walls 41, 42. , Intake manifold parts 4
At the time of vibration welding of 0, the surge tank, the resonator, and the communication pipe were simultaneously formed. Therefore, the first
As with the intake manifold of the embodiment, it is possible to suppress an increase in the number of parts and an increase in the number of assembling work steps, thereby reducing manufacturing costs.

The above embodiment may be modified as follows, and the same operation and effect can be obtained in such a case. In the second embodiment, the partition wall 37 is also used as a pair of partition walls 35 and 36, but separate partition walls may be provided for each of the partition walls 35 and 36.

In the intake manifold component of the second embodiment, three or more pairs of partition walls may be provided, and three or more resonators may be formed simultaneously when the intake manifold component is welded by vibration. In this way, it is possible to reduce the intake sound of three or more different frequencies.

[0048]

As described in detail above, according to any one of the first to fifth aspects of the present invention, an increase in the number of parts and an increase in the number of assembling work steps are suppressed, and the manufacturing cost is reduced. Can be.

According to the fourth aspect of the present invention, the length or the sectional area of the communication pipe is changed by changing the length or the position of the partition wall. As a result, the intake sound of a desired frequency can be reduced.

According to the fifth aspect of the present invention, by changing the length or the position of the facing portion, the length or the cross-sectional area of the communication pipe is changed, so that the intake noise of a desired frequency can be reduced. it can.

[Brief description of the drawings]

FIG. 1 is a front view of a resin intake manifold according to a first embodiment.

FIG. 2 is also a bottom view

FIG. 3 is an exploded perspective view of the same bottom view.

FIG. 4 is a sectional view taken along line AA of FIG. 2;

FIG. 5 is a plan view of an intake manifold component.

FIG. 6 is a plan view of an intake manifold component according to a second embodiment.

FIG. 7 is a plan view of an intake manifold component according to a third embodiment.

FIG. 8 is a partial cross-sectional view of a conventional intake manifold with a resonator.

[Explanation of symbols]

1 ... intake manifold, 4 ... surge tank, 5 ...
Resonator, 6 ... communication pipe, 13 ... surge tank part, 14
... Resonator part, 15 ... Communication pipe part, 17, 18, 35 ~
37, 41, 42: Partition wall, 43, 44: Opposing wall

Claims (5)

[Claims] At least one of two divided bodies made of a resin material has an accommodating portion for forming a surge tank, and both divided bodies have a welded portion on each divided surface, and these welded portions are butted. A resin intake manifold integrally formed by vibration welding, wherein the housing section defines a surge tank section and a resonator section, and constitutes a communication pipe section that communicates the surge tank section and the resonator section. Resin intake manifold provided with a pair of partition walls. 2. The resin intake manifold according to claim 1, wherein a plurality of pairs of the partition walls are provided, and each pair of the partition walls comprises a plurality of resonator sections and a plurality of communication pipe sections. 3. The resin intake manifold according to claim 1, wherein the pair of partition walls extend in directions different from each other from an inner peripheral surface of the housing portion, and the communication pipe is provided at an intermediate portion thereof. A resin intake manifold having an opposing portion for constituting a portion. 4. The resin intake manifold according to claim 3, wherein the pair of partition walls are provided in a plane or a curved surface, and are provided so as to face each other at an intermediate portion thereof. Made intake manifold. 5. The resin intake manifold according to claim 3, wherein at least one of the pair of partition walls is bent at an intermediate portion side so as to form a facing portion with the other partition wall. Intake manifold.