WO2001083976A1

WO2001083976A1 - Intake manifold

Info

Publication number: WO2001083976A1
Application number: PCT/JP2001/001436
Authority: WO
Inventors: Masatoshi Hada; Kazuhiko Nakazato
Original assignee: Aichi Kikai Kogyo Kabushiki Kaisha; Sanoh Kogyo Kabushiki Kaisha
Priority date: 2000-04-28
Filing date: 2001-02-26
Publication date: 2001-11-08
Also published as: JP2001304058A

Abstract

An intake manifold, comprising a plurality of suction pipes (3) fixedly brazed to at least either of a suction pipe mounting part (4) and a collector (2), wherein frame parts (12) for supporting a gallery pipe (5) are formed integrally with the surface of the collector (2) or the suction pipe mounting part (4), and the gallery pipe (5) is fixedly brazed to the frame parts (12), whereby the number of parts necessary for the mounting of the gallery pipe can be reduced, the mounting strength of the gallery pipe can be increased, and the weight of the intake manifold can be reduced.

Description

Description Ink Manifold

Technical field to which the invention belongs

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intake manifold of a multi-cylinder engine, and more particularly to an intake manifold having an improved gallery-pipe mounting structure.

Conventional technology

In a multi-cylinder engine, a mixture of fuel and air power is supplied to the fuel chamber of a cylinder head via an intake manifold. The intake holder integrates the intake pipes, and is designed to prevent the interference of intake air and to make the distribution of intake air uniform.

Fig. 6 is a diagram showing a conventional intelligent holder. The intelligent manifold 1 has a collector 2 made of aluminum alloy or die-cast aluminum, and a plurality of intake pipes 3 made of aluminum pipe. An intake pipe mounting part 4 made of aluminum material, die-cast or wrought material for fixing the intake pipe 3 to the engine is integrated with brazing. The intake pipes 3 are each bent into a predetermined shape, and both ends are joined to the collector 2 and the intake pipe mounting portion 4. In such an intake manifold 1, various pipes and tubes are provided in addition to the intake pipe 3, for example, a sensor that detects a negative pressure of an intake manifold by a fuel injection device. There is a gallery pipe 5 connected with. The gallery pipe 5 of this type is fixed by bolting so as not to come off from the collector 12 of the intake manifold 1. The conventional example shown in FIG. 6 is an example in which a mounting seat 6 is integrally formed with the collector 1-2.A stay 7 is integrally mounted on the gallery pipe 5 by brazing, and the stay 7 is attached to the mounting seat 6. It is fastened and fixed using Porto 8.

The mounting position of the gear rally 5 may be determined by providing a mounting seat 6 on the intake pipe 3 as shown in FIG. 8 or in FIG. 11 in order to secure a working space for the tool or for convenience of assembly. As shown, an example of attachment to the intake pipe attachment portion 4 is known.

As shown in Fig. 6, tighten the stay 7 with the bolt 8 on the mounting seat 6 As shown in Fig. 7, it is necessary to take a threading allowance A between the bolt 8 and the female thread of the mounting seat 6 to a length of 1.5 to 2.0 times the diameter of the bolt 8 as shown in Fig. 7. is there. For this reason, conventionally, the screwing allowance A is secured by forming a bag boss portion 6 a projecting into the inside of the collector 12 in the mounting seat 6. However, since the bag boss portion 6a becomes a resistance to the airflow flowing through the inside of the collector 12, it is necessary to provide the boss portion 6a at a location where the influence on the airflow is as small as possible. There is inconvenience.

On the other hand, as shown in FIG. 8, when the gear pipe 5 is attached to the mounting seat 6 formed integrally in the middle of the intake pipe 3, unlike the case of FIG. It is not possible to provide a protruding portion such as the bag boss portion 6a inside the inside. This is because a large airflow resistance is created inside the intake pipe 3 and the original function of the intelligent bear 1 is impaired. Therefore, as shown in Fig. 9, the mounting seat 6 must be raised in order to secure the screwing allowance A, and if there is an obstruction above, the space for the fastening work with the tool 9 is limited. There is a problem that workability deteriorates remarkably. Therefore, as shown in FIG. 10, instead of the mounting seat 6, the bridge member 10 is fixed by brazing or the like so as to bridge between the suction pipes 3, 3. It is also practiced to fasten one 7 with a bolt 8. However, since the bridge member 10 is a separate component from the intake pipe 3, it is inferior in reliability with respect to vibration, and has problems such as an increase in weight and a complicated shape. As shown in Fig. 12, when the mounting seat 6 is provided above the intake pipe mounting part 4, as shown in Fig. 12, the width of the mounting seat 6 is increased to secure the width B of the bolt seat surface. In addition, similarly to FIG. 8, there is a problem that the height of the screw is increased due to the necessity of securing the threading allowance A, and the workability of fastening with the tool 9 is deteriorated.

On the other hand, from another point of view of the manufacturing process of the intelligent bear 1, the process of attaching the stage 7 to the gallery pipe 5 in advance, and fastening the stage 7 to the collector 12 with bolts 8 There is a problem that the number of parts and man-hours such as steps 7 and bolts 8 increase due to the process.

On the other hand, from the viewpoint of strength, the strength of the gallery pipe 5 and The strength is weaker than the joint strength between the stay 7 and the mounting seat 6, and the gallery pipe 5 may fall off the stay 7 due to vibration or impact. In addition, since the gallery pipe 5 has a support structure that is cantilevered by the stay 7, the engine vibration is amplified by the stay 7 and transmitted to the gallery pipe 5, so that an iron gear pipe 5 is used. Needed. If an aluminum pipe is used, it must have a considerable thickness to obtain the same strength as an iron pipe. There was a problem that there was almost no difference from Eve.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-mentioned problems of the prior art, and to reduce the number of parts required for mounting a gallery pipe to a collector and to mount a gallery pipe It is an object of the present invention to provide an intake manifold that can increase the degree of freedom in position, further enhance the mounting strength of a gallery pipe, and contribute to weight reduction.

Disclosure of the invention

In order to achieve the above object, the present invention is directed to an interior bearer in which a plurality of intake pipes are provided with an intake pipe mounting portion, wherein the intake pipe is fixed to at least one of the collectors by a mouth. And a gantry section for supporting the porcelain is integrally formed on the surface of an arbitrary portion of a member to be mounted in the furnace of the intake manifold, and a gallery pipe is fixed to the gantry section by a lip. It is characterized by

According to the present invention, a gantry for supporting a gallery pipe is integrally formed on a surface of an arbitrary portion of the imaginary bear, and a gear pipe is fixed to the gantry by a lip. Therefore, the position of the gallery pipe on the intake manifold and the degree of freedom in the piping arrangement are increased to make effective use of the space, and the number of parts required for mounting on the collector is reduced. It has a high mounting strength, is inexpensive, has a highly reliable structure, and contributes to weight reduction.

BRIEF DESCRIPTION OF THE FIGURES

FIG. 1A is a perspective view of an intake manifold showing a first embodiment.

Fig. 1 (b) is a side view of the intake manifold. Fig. 2 is a sectional view showing the gear-pipe mounting structure of the intake manifold o

FIG. 3A is a side view showing a second embodiment of the intelligent bearer. FIG. 3B is a side view showing a modified example of the second embodiment of the intake manifold.

FIG. 4A is a side view showing a third embodiment of the intake manifold. FIG. 4B is a side view showing a modification of the third embodiment of the intake manifold.

FIG. 5 (a) is a perspective view of an intake holder showing a fourth embodiment. Fig. 5 (b) is a side view of the intake manifold.

FIG. 6 is a perspective view showing a conventional intake manifold.

FIG. 7 is a cross-sectional view of the conventional intake manifold of FIG.

FIG. 8 is a perspective view showing another example of the conventional bearer holder.

FIG. 9 is a side view of the conventional intake manifold shown in FIG.

FIG. 10 is a perspective view showing a gallery pipe mounting member used in a conventional intake manifold.

FIG. 11 is a perspective view showing still another example of the conventional intake manifold. FIG. 12 is a side view of the intake manifold of FIG.

Embodiment of the Invention

Hereinafter, an embodiment of an intelligent bearer according to the present invention will be described with reference to the accompanying drawings.

FIG. 1A shows an intake manifold 20 according to the present embodiment, and is a perspective view of the intake manifold 20. FIG. 1B is a side _! Side of the intake manifold 20. FIG. The intake holder 20 is the same as the intake holder 1 of the conventional example in FIG. 6 except that the mounting structure of the gallery pipe 5 is different, and the same components are denoted by the same reference numerals. And a detailed description thereof will be omitted. When forming the collector 2 by aluminum or aluminum die-casting, a plurality of bases 12 for supporting a plurality of gallery pipes are formed at required portions of the main body surface. Have been. As shown in FIG. 2, the pedestal portion 12 has a convex three-dimensional shape protruding from the surface of the collector 2, and a semicircular engagement groove 13 is formed at an upper portion thereof. I have. The cross-sectional shape of the engagement groove 13 corresponds to the outer diameter of the gallery pipe 5. In this embodiment, two gantry portions 12 are formed on the side surface of the collector 12 facing the intake pipe mounting portion 4 side. The two pedestal sections 12 support one gallery pipe 5.

An intake pipe mounting tube 14 is joined to the collector 12 by brazing, and the intake pipe 3 is similarly brazed and fixed to the intake pipe mounting tube 14. The gallery pipe 5 is brazed whenever the suction pipe 3 and the suction pipe mounting tube 14 are brazed to the collector 2. That is, the gallery pipe 5 can be engaged with the engagement groove 13 and temporarily assembled in the collector 12 and then can be attached in the furnace. The gallery pipe 5 can be brazed at the time of the splicing process of 3. For this reason, it is possible to reduce the man-hour for mounting the gallery pipe as compared with the conventional case. Moreover, since the gantry 12 is integrally formed with the collector 12, no gallery pipe fixing parts are required. Further, the gallery pipe 5 is directly supported via the pedestal section 12 integral with the collector 12, so that the gallery pipe 5 is different from the structure in which the stay 7 is fastened with bolts 8 as shown in FIG. In order to secure the screwing allowance A, the bag boss 6a does not protrude into the inside of the collector 12, and as shown in FIG. 2, the inner surface of the collector 2 has a resistance to airflow. The protrusion can be eliminated. In addition, a vibration-resistant support structure is provided in which the pedestal portion 12 integral with the collector 12 stably supports the gallery pipe 5, so that the thickness of the gallery pipe 5 can be reduced as compared with the conventional case of cantilever support. In particular, for the gallery pipe 5, it is preferable to use an aluminum pipe for weight reduction, but conventionally, as described in the section of the related art, an iron pipe is not used to secure the strength. However, according to the present invention, a thin aluminum pipe can be used.

Further, the pedestal portion 12 integrated with the collector 12 not only holds the gallery pipe 5 to the collector 12 but also exhibits a function similar to a reinforcing rib of the main body of the collector 12. In consideration of the strength of the collector 1 By arranging them in a well-balanced manner, the strength of the collector 2 can be improved. In addition, by arranging it in a position where the strength is relatively weak, that part can be reinforced. In a collector provided with a reinforcing rib, an engaging groove may be formed in the reinforcing rib, and the gallery pipe 5 may be engaged with the engaging groove and fixed by brazing.

Next, FIG. 3 (a) shows an example in which the gantry 12 is arranged on the lower surface of the collector 2 so as to face the curved portion of the intake pipe 3, and FIG. This is an example in which the gantry 12 is arranged at a position adjacent to 4.

Since the gallery pipe 5 is temporarily assembled with the intake pipe 3 and then brazed in the furnace, it is necessary to secure tool space unlike the conventional way of assembling by fastening the port 8 as in the past. There is no restriction and there is no choice. Therefore, as shown in Fig. 3 (a) and Fig. 3 (b), by attaching the gear pipe 5 to the unused part hidden by the intake pipe 3, the space can be effectively used. The structure of the bear 20 can be simplified.

Note that the gantry 12 may be arranged on the surface of the intake pipe mounting cylinder 14.

The above is an example in which the gantry 12 is provided on the collector 12. However, the gantry 12 may be integrally formed with the intake pipe mounting portion 4 of the intake pipe 3.

FIG. 4A shows an example in which the gantry section 12 is arranged on the side surface of the intake pipe attachment section 4, and FIG. 4B shows an example in which the gantry section 12 is arranged on the end face of the intake pipe attachment section 4. In each of the examples, unlike the conventional example of FIG. 12, it is possible to mount the gear rally pipe 5 without increasing the height and width of the intake pipe mounting portion 4, and, similarly to the previous examples, There is no restriction on the fixed position, and the degree of freedom in the mounting position of the gallery pipe 5 increases. Next, FIG. 5 (a) shows a perspective view of an integral holder 20 in which two gallery pipes 5 are attached to the collector 12, and FIG. 5 (b) shows the integral holder. FIG. 2 is a side view of a bear 2 holder 20.

In this case, two engaging grooves 13 shown in FIG. 2 are formed in the gantry portions 12a and 12b. As shown in FIG. 5 (b), the gallery pipes 5 can be fixed by simply attaching the gantry portions 12 & to 12c, so that the gallery pipes 5 can be fixed in addition to the degree of freedom of the mounting position. The degree of freedom in piping arrangement is also increased.

Claims

The scope of the claims

1. In an intake manifold in which a plurality of intake pipes are fixed to at least one of an intake pipe mounting portion and a collector by a mouth, a mounting portion for supporting a gear pipe is provided in a furnace row of the intake manifold. An integral bearer comprising an integral part integrally formed on a surface of an arbitrary part of a member to be attached, and a gear pipe fixed to the gantry part by brazing.

2. The intake pipe is fixed via an intake pipe attachment tube when the intake pipe is fixed to at least one of the intake pipe attachment portion and the collector by brazing. The described intake manifold.

3. The bearer holder according to claim 1, wherein a portion where the pedestal portion is integrally formed is a surface of the intake pipe mounting portion.

4. The intake manifold according to claim 1, wherein a portion where the gantry is integrally formed is a surface of the collector.

5. The imaginary holder according to claim 2, wherein a portion where the gantry is integrally formed is a surface of the intake pipe mounting cylinder.