JPH09203358A - Fixedly supporting device to engine main body for synthetic-resin-made manifold - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fixedly supporting device, capable of preventing vibration generation such as the resonance, etc., of a synthetic-resin-made manifold, to restrain the distortion or twist of the manifold at a minimum. SOLUTION: This device has inlet and outlet flange parts 17 and 15D connected to a surge part 11A and port parts 11B and 15B respectively. The inlet and outlet flange parts are joined to a throttle valve main body and the joining surface of the intake port part of an engine main body 100 respectively. A reinforcing member 40 is strided on the inlet flange part, and one or plural places other than the inlet flange part between a surge part and an engine main body, in a fixedly supporting device 300 to the engine main body of a synthetic resin-made manifold 1. The reinforcing member is composed of a supporting plate 40A, arranged in a horizontal attitude between the surged part and the throttle main body, and the engine main body, and a reinforcing plate 40B arranged in a direction nearly orthogonal to the supporting plate; and is joined to the joined surface 17A of the throttle valve main body of the inlet flange part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for fixing and supporting a synthetic resin manifold used for an automobile intake manifold or the like on an engine body, and more particularly to a synthetic resin manifold which is susceptible to vibration such as resonance. It's about what I've kept you from getting up.

[0002]

2. Description of the Related Art For example, most intake manifolds for automobiles are made of aluminum alloy castings.
Recently, research on the direction toward a synthetic resin manifold for the above-mentioned aluminum alloy casting has been increased. The synthetic resin manifold used for this is composed of a first joint portion (referred to as a gas suction portion or a surge portion), a second joint portion (referred to as a cylinder head joint portion or a port portion), and a branch pipe connecting both portions. It has a complicated shape in which

In the manufacture, an internal molded body (internal molded film) having a predetermined shape in the hollow portion of the manifold is integrally molded by blow molding, and both outer joint surfaces of the upper shell and the lower shell are joined to the outer periphery thereof. Then, a synthetic resin manifold having a two-layer structure is obtained. Of course, there is a case where a synthetic resin manifold having a one-layer structure in which both the joining surfaces of the upper shell and the lower shell are joined to each other without incorporating the internal molding film is manufactured.

When the manifold made of synthetic resin is fixedly supported on the engine body, the outlet flange is cantilevered on the joint surface of the intake port of the engine body as in the case of the aluminum manifold. Further, in order to secure the fixed support, a support plate may be reinforced between the surge portion of the manifold and the engine body.

[0005]

In the fixed support of the manifold and the engine body, the rigidity of the outlet flange portion of the manifold made of synthetic resin is low and cantilevered, and the inlet flange portion is not supported. Since the weight of the throttle valve main body is held, the vibration of the engine is used as a vibration source, and the entire manifold (in particular, the inlet flange portion having the throttle valve main body) vibrates with a large twist and twist.
Then, in a certain specific vibration frequency range, there is a problem that the energy resonates with a large energy with respect to the energy of the vibration source. As a result, the large noise and vibrations that are generated propagate to the vehicle body, impairing quietness, and due to the vibrations, the durability of the inlet and outlet flanges decreases, making them unusable. There is a risk.

As a measure against the above problem, it has been practiced to reinforce a space between the surge portion of the manifold and the engine body with a support plate, as in the case of the aluminum manifold. However, the anti-vibration effect by this is hardly seen, and there is an urgent need to develop a device for fixing and supporting a synthetic resin manifold having a stronger anti-vibration effect to the engine body.

The present invention has been made in view of the above-mentioned problems in the prior art, and a fixed support device capable of suppressing twisting and twisting of a manifold so that vibration such as resonance does not occur in the synthetic resin manifold. The purpose is to provide.

[0008]

According to a first aspect of the present invention, there is provided a device for fixing and supporting a synthetic resin manifold to an engine body, wherein an inlet flange portion connected to a surge portion and the surge are provided. A synthetic resin obtained by joining the inlet flange of a synthetic resin manifold that has an outlet flange that connects to a port that branches from the valve section to the throttle valve body, and the outlet flange to the joint surface of the intake port of the engine body. In a device for fixing a manufactured manifold to an engine main body, a reinforcing member is laid between the surge portion and the engine main body at an inlet flange portion and at one or more other locations to reinforce the inlet flange portion. The member is a support plate arranged between the surge part and the throttle valve body and the engine body, and a reinforcing plate arranged in a direction substantially orthogonal to the support plate. Becomes, the reinforcing plate is characterized in that it is joined to the throttle valve body joint surface of the inlet flange.

According to the above construction, the synthetic resin manifold in which the outlet flange portion is cantilevered with the engine body is between the surge portion and the engine body, and the inlet flange portion and one or more other than the inlet flange portion. The bending and twisting can be suppressed by the reinforcing member that is installed over the location, and the resulting vibration can be efficiently damped. In addition, the support plate arranged between the surge section and the throttle valve main body and the engine main body in the inlet flange section has a reinforcing plate arranged in a direction orthogonal to this, and this is joined to the throttle valve main body joint surface of the inlet flange section. Since the,
Minimizes twisting and twisting due to the throttle valve body of heavy objects, and efficiently suppresses complex vibrations that occur in various directions such as horizontal and vertical directions.

Each of the reinforcing members arranged between the synthetic resin manifold and the engine body minimizes the twisting and twisting of the manifold, so that it is one-third to one-third that of the conventional fixed supporting means. Tests have confirmed that vibration energy can be reduced.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a fixing and supporting device for a synthetic resin manifold to an engine body according to the present invention will be specifically described with reference to the drawings. FIG. 1 is a perspective view in which a synthetic resin manifold according to the present invention is attached to an engine body, and FIG. 2 is an exploded perspective view of the same. Also, in FIG.
4 is a plan view and a side view.

First, the synthetic resin manifold 1 of the present invention.
(Hereinafter simply referred to as manifold) configuration and each molded body 1
Details of 1, 13, 15, and 17 will be described with reference to FIG.
Inner molded film 13 having a predetermined shape in the hollow portion of the manifold
Are integrally molded by blow molding. That is, a space that forms the inner surface of the manifold hollow is formed between the upper mold and the lower mold, and the parison is sandwiched between the upper mold and the lower mold to inject air. As a result, the parison is formed into a thin film along the shape of the space. The inner molded film 13 produced by this method includes a gas suction end 13C connected to the throttle valve body, a surge portion 13A, a port portion 13B distributed to each cylinder head of the engine, and a cylinder head joining end 13D of this tip. Consists of.

On the other hand, the upper shell 11 and the lower shell 1 having a predetermined shape outside the manifold 1 and divided into a plurality of parts (in the drawing, divided into two along the flow direction of the manifold).
Reference numeral 5 is an outlet flange portion which is a gas suction portion 11C, 15C having an inlet flange portion 17 connected to the tip thereof, surge portions 11A, 15A, port portions 11B, 15B, and joint portions 11D, 15D of the cylinder head at the tip. It consists of 15D. Then, the outer surface is molded into a predetermined shape of the outer surface of the manifold, and the inner surface is molded into the same shape as the outer surface of the inner molded film 13, and serves as a bonding portion with the inner molded film 13.

Next, a structure for fixing and supporting the manifold 1 to the engine body 100 according to the embodiment shown in FIGS. 1 to 4 will be described. In the engine room ER of the automobile, the engine body 100 is placed horizontally, the rear side thereof is provided with the intake port portion 110 and the joint surface 110A, and the front side is provided with the exhaust port portion 120 and the joint surface 120A. There is. The outlet flange portion 15D of the manifold 1 is aligned with the joint surface 15E of the intake port portion 110, and is fastened in a cantilever state by the bolt 50 of the fastening means. The throttle valve body (throttle body) 20 is fitted to the joint surface 17A of the inlet flange portion 17 of the manifold 1 with the flange portion 20A thereof, and is fastened by a bolt 51 of fastening means. Further, a pipe 25 connected to an air cleaner 23 is connected to the intake port surface 20B of the throttle valve body (throttle body) 20. As described above, the throttle body (throttle body) 20 and other heavy objects such as the pipe 25 are attached to the inlet flange portion 17 of the manifold 1.

As described above, the manifold 1 in which the outlet flange portion 15D is attached to the intake port portion 110 of the engine body 100 has its own surge portions 11A and 15A and each member 2.
Although the weight of 0, 23, and 25 causes twisting and twisting, the cylinder head 13 of the engine body 100
0A bolt hole 130A provided on the top surface and the surge portion 1
A support plate 30A serving as a reinforcing member 30 arranged between a bolt hole 15F provided on the top surface of 1A, 15A is straddled by a bolt 53 of a fastening means.

Further, a reinforcing member 40 is laid across the inlet flange portion 17. The reinforcing member 40 is provided in the surge section 1
1A, 15A, throttle valve body 20, and cylinder head 13
The support plate 40A is disposed between the support plate 40A and the top surface of 0, and the reinforcing plate 40B is integrally formed in a direction substantially orthogonal to the support plate 40A. The support plate 40A includes the surge section 11
Bolt holes 40C corresponding to one bolt hole 15G provided on the top surfaces of A and 15A, a bolt hole 40D corresponding to one bolt hole 20C provided in the throttle valve body 20, and a top surface of the cylinder head 130. Two bolt holes 130B,
Bolt holes 40E and 40E corresponding to 130B are provided. The reinforcing plate 40B is provided with a reinforcing wall 41 arranged in a direction orthogonal to the reinforcing plate 40B and extending between the reinforcing plate 40B and the support plate 40. The reinforcing wall 41 is effective in increasing the rigidity of the reinforcing plate 40B and improving the vibration damping effect.

In the support plate 40A, the bolt holes 40E are aligned with the bolt holes 130B and 130B, are connected by the bolts 55 of the fastening means, and the bolt holes 40C are aligned with the bolt holes 15G of the surge portions 11A and 15A. The bolts 57 of the fastening means are used for connection, and the bolt hole 40C is also used.
Are aligned with the bolt holes 20C provided in the throttle valve body 20, and are connected by the bolts 57 of the fastening means. Further, the reinforcing plate 40B has the bolt holes 40F in the inlet flange portion 1
Bolt hole 17B formed in the joint surface of the throttle valve body 20 of No. 7
And the bolts 59 of the fastening means are connected.
By the above, the fixed support device 300 of the present invention is completed.

The embodiment of the fixed supporting device 300 of the present invention has the above-mentioned structure, and the manifold 1 in which the outlet flange portion 15D is cantilevered with the engine main body 100 has the surge portion 11A. , 15A and the engine body 100 are reinforced by the support plate 30A of the reinforcing member 30 to improve the rigidity, and the effects of suppressing twisting and twisting and suppressing vibration are exhibited. In addition, the inlet flange portion 17 connected to the surge portions 11A and 15A.
Also, the rigidity is improved by being reinforced by the support plate 40A of the reinforcing member 40 that is provided between the throttle valve main body 20 and the engine main body 100, and the rigidity is further increased by the reinforcing plate 40B that is arranged in a direction substantially orthogonal to this. Has been improved, suppressing deflection and twisting in various directions such as horizontal and vertical directions.
The effect of suppressing vibration is exhibited.

In the manifold 1, the surge portions 11A and 15A and the inlet flange portion 17 are
The support plate 30A of the reinforcing member 30, the support plate 40A of the reinforcing member 40, and the reinforcing plate 4 arranged in a direction substantially orthogonal to the support plate 40A.
Since 0B can provide rigidity in various directions, the surge parts 11A and 15A of the manifold 1 can be provided.
And inlet flange portion 17, throttle valve body 20, each member 2
It is possible to prevent twisting and twisting due to the weight of 3, 25, and to exert an effect of suppressing resonance due to composite vibration in various directions due to vibration of the engine 100.

Fixed support device 300 for the manifold 1
In order to confirm the anti-vibration effect of No. 1, the vibration test of the manifold 1 was performed by the vibration test apparatus 200 shown in FIGS. The vibration test apparatus 200 includes a diaphragm 2 that vibrates vertically.
The model 100 'of the engine body is laid on 20 and the manifold 1 is connected to the model 100', and a fixed support device for the manifold 1 is provided. FIG. 5 shows a conventional fixed support device. The outlet flange portion 15D of the manifold 1 is connected to the joint surface 110A of the intake port portion 110 of the engine body model 100 ', and the surge portions 11A and 15A of the manifold 1 and the inlet flange portion 1 are connected.
7, the support plates 30A and 40A of the reinforcing members 30 and 40 are provided so as to extend between the throttle valve body 7 and the model 100 'of the engine body.

On the other hand, FIG. 6 shows the fixed supporting device 300 of the present invention.
The outlet flange portion 15D of the manifold 1 is connected to the joint surface 110A of the intake port portion 110 of the engine body model 100 ', and the surge portions 11A and 15A of the manifold 1 and the inlet flange portion 17 and the throttle valve are connected. Body 2
0 and the model 100 'of the engine body, the support plates 30A and 40A of the reinforcing members 30 and 40 of the present invention are joined, and the reinforcement plate 40B is joined to the joint surface of the throttle valve body 20 of the inlet flange portion 17. Has been done.

A model 100 'of the engine body having a fixed support device is placed on the vibration plate 210 of the vibration test apparatus 200, and the vertical vibration of the vibration plate 210 gives vibration to the model 100' of the engine body. By manifold 1
Since vibration in the direction of approaching and separating from the model body 100 'of the engine main body occurs, this was measured by an accelerometer G provided on the inlet flange portion. The intake port 11
0 is equipped with an accelerometer G'for monitoring.

When vertically vibrated under the conditions of a vibration acceleration of 10 G and a frequency of 160 HZ, the conventional fixed support device vibrates as much as 75 G in the manifold 1 with respect to 10 G of vibration source energy. Resonance points that appear will appear. However, the fixed support device 3 of the present invention
It was confirmed that the vibration energy of the manifold 1 is 25 G and the vibration energy can be reduced to 1/3 of the vibration energy of the conventional type.

The present invention is not limited to the above embodiment. For example, although the inlet flange portion 17 between the surge portions 11A and 15A and the engine body 100 and the reinforcing members 30 and 40 in one place other than the inlet flange portion 17 are shown as an example, they are provided in a plurality of places other than the inlet flange portion. Alternatively, a large number of reinforcing members 30 and 40 may be used for reinforcement. or,
The direction in which the reinforcing members 30 and 40 are arranged can be arbitrarily set according to the arrangement of the engine body and the manifold. Further, in the above-described embodiment, the mounting seat portion is formed on the manifold 1 and the bolt hole is provided on the mounting seat portion.
You may directly provide a bolt hole in.

[0025]

As described in detail above, according to the present invention, the manifold member is provided with the reinforcing member that is provided between the surge portion and the engine body and across the inlet flange portion and one or more other locations. It has the effect of suppressing twisting and twisting, and effectively damping the vibration of the manifold due to the vibration from the engine. Further, a reinforcing plate is arranged in the surge member and between the throttle valve main body and the engine main body in a direction substantially orthogonal to the support plate, and is joined to the throttle flange main body joint surface of the inlet flange. Therefore, it is possible to minimize the twisting and twisting of the manifold due to the throttle valve body of the heavy object, and to effectively suppress the composite vibration generated in various directions.

[Brief description of drawings]

FIG. 1 is a view showing an embodiment of the present invention, and is a perspective view in which a synthetic resin manifold is attached to an engine body.

FIG. 2 is a view showing an embodiment of the present invention, and is a developed perspective view of attaching a synthetic resin manifold to an engine body.

FIG. 3 is a view showing an embodiment of the present invention and is a plan view of a manifold and an engine body.

FIG. 4 is a view showing an embodiment of the present invention and is a side view of a manifold and an engine body.

FIG. 5 is a view showing an embodiment of the present invention, and is a side view of a state in which a manifold provided with a conventional fixed support device is placed on a vibration test device.

FIG. 6 is a view showing an embodiment of the present invention, and is a side view of a state in which a manifold provided with the fixed support device of the present invention is placed on a vibration test device.

FIG. 7 is a diagram showing an embodiment of the present invention and is a developed perspective view of a manifold.

[Explanation of symbols]

1 Synthetic Resin Manifold 11 Upper Shell 11A, 15A Surge Part 11B, 15B Port Part 15E Joint Surface 15 Lower Shell 15D Outlet Flange Part 15F, 15G Bolt Hole 17 Inlet Flange Part 17A Joint Surface 17B, 20C Bolt Hole 20 Throttle Valve Body 20A Flange Part 30, 40 Reinforcing member 30A, 40A Support plate 40B Reinforcing plate 40C, 40E, 40F Bolt hole 50, 51, 53, Bolt 55, 57, 59 Bolt 100 Engine body 100 'Engine body model 110 Intake port portion 110A Joint surface 130 cylinder heads 130A, 130B bolt holes 300 fixed support device

Claims (1)

[Claims] 1. An inlet flange portion connected to a surge portion,
An inlet flange portion of a synthetic resin manifold having an outlet flange portion connected to a port portion branched from the surge portion is joined to a throttle valve body, and the outlet flange portion is joined to a joint surface of an intake port portion of an engine body. In a device for fixing a synthetic resin manifold to an engine body, a reinforcing member is provided between the surge portion and the engine body, at an inlet flange portion and at one or more other locations,
The reinforcing member of the inlet flange portion includes a support plate disposed between the surge portion and the throttle valve body and the engine body, and a reinforcing plate disposed in a direction substantially orthogonal to the support plate. Is a device for fixing and supporting a synthetic resin manifold to an engine body, which is joined to a joint surface of a throttle valve body of an inlet flange portion.