JP2003254179A - Intake manifold - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an intake manifold assuring easy installation at a low cost by eliminating a negative pressure takeout hose to be installed separately. <P>SOLUTION: The intake manifold 1 has a surge tank 5 furnished with an upper tank 6 and lower tank 7 joined together by welding a lateral flange part 601 and an upper flange part 701. The lateral flange part 601 and upper flange part 701 are partially shaped wider so that a first aeration passage 11 and a second aeration passage 12A are formed therein. On the other hand, a vertical flange part 602 of the upper tank 6 is coupled rigidly with a vertical flange part 201 of a coupling pipe 2, and the vertical flange part 201 is furnished with a second aeration passage 2B having a communication with the second aeration passage 12A. A third aeration passage 13 in communication with the second aeration passage 12B is formed in a pipe part 205 extending outward from the vertical flange part 201. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intake manifold having a surge tank with a port for extracting negative pressure.

[0002]

2. Description of the Related Art Conventionally, when various negative pressures for a master brake or a pressure sensor are taken out from a surge tank in an intake manifold, a negative pressure take-out port is arranged in the surge tank and piping is provided on each negative pressure side. For example, as shown in FIG. 7, the intake manifold 30 includes a surge tank 31 and a plurality of connecting pipes 32 connected from the surge tank 31 to the engine side and surrounding the outer circumference of the surge tank 31. A throttle connecting pipe 33 extending to the throttle side is arranged in the upper part of the. The negative pressure extraction port 34 is arranged on one end side of the throttle connection pipe 33, and one end of the negative pressure extraction hose 35 is attached to the negative pressure extraction port 34. The negative pressure extraction hose 35 is used for the throttle connecting pipe 3.
3 was extended toward the rear of the leftmost end connecting pipe 32A while being bent so as to go around the outermost leftmost connecting pipe 32A. Further, in another embodiment, in order to improve the workability of assembling around the intake manifold 41, as shown in FIG. 8, a negative pressure extracting hose 42 extending toward the rear of the leftmost connecting pipe 32A is provided. In addition, the intermediate pipe 44 supported by the metal fitting 43 is interposed.

[0003]

However, in the conventional intake manifold 30 shown in FIG. 7, when the negative pressure extracting hose 35 is attached to one end of the throttle connecting pipe 33, it is surrounded by the connecting pipe 32 and is recessed. Since the negative pressure taking-out hose 35 is attached to the negative pressure taking-out port 33 arranged at the position, the attaching work is made difficult, and the negative pressure taking-out hose 35 is surrounded by the leftmost connecting pipe 32A. Since the piping is provided, it interferes with engine-mounted components arranged around the intake manifold 30, and it takes a lot of time and effort to handle the negative pressure extraction hose 35, which requires assembly time. .

In the intake manifold 41 shown in FIG. 8, an intermediate pipe 44 is used,
It was supposed to increase costs.

The present invention is intended to solve the above-mentioned problems, and by eliminating the negative pressure extracting hose connected from the throttle connecting pipe, the assembling work can be carried out easily.
It is an object of the present invention to provide an intake manifold that can reduce costs.

[0006]

In order to solve the above-mentioned problems, the intake manifold according to the present invention is configured as follows, that is, in the invention according to claim 1, the outer periphery of the surge tank. A negative pressure take-out port is integrally formed in the portion, and a ventilation path communicating with the negative pressure take-out port is formed in the wall portion of the surge tank.

That is, when the surge tank is molded, an air passage communicating with the negative pressure taking-out port is provided in the wall of the surge tank in advance, so that a pipe for taking out the negative pressure taking-out hose separately from the recessed position can be provided. Try not to do it. As a result, the negative pressure take-out hose that interferes with the engine-mounted parts arranged around the connecting pipe and the surge tank can be removed, so that the intake manifold that can be formed at low cost can be provided. Moreover, the negative pressure take-out port can be freely set in a wide place where there are no interfering parts among the outer peripheral position of the surge tank. It can be easily piped without interfering with other parts.

According to the second aspect of the present invention, the intake manifold includes, for example, an upper tank and a lower tank each having a welding flange portion, and the welding flange portions are joined to be integrally formed. If so, a part of the welding flange portion communicates with the first ventilation passage communicating with the inside of the surge tank, the second ventilation passage communicating with the first ventilation passage, and the second ventilation passage. By disposing the third ventilation passage, it is not necessary to separately attach a negative pressure extracting hose to the surge tank, which hinders the connection pipes and engine mounted parts arranged around the surge tank. Therefore, an inexpensive intake manifold can be provided.

According to the third aspect of the present invention, the third ventilation passage in the second aspect of the invention can be integrally formed with the surge tank as a negative pressure take-out port arranged on the outer peripheral portion of the surge tank. It is possible to provide a more inexpensive intake manifold without attaching a special hose, and it is possible to freely set the intake manifold in a wide place without any interfering parts outside the surge tank.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

The intake manifold 1 of the embodiment is
As shown in FIGS. 1 and 2, a plurality of hollow connecting pipes 2 extending toward the engine room (not shown), and the connecting pipes 2
A hollow extension pipe 3 having a mounting flange portion 4 for mounting in the engine room at the tip of the surge tank portion 5 connected to the other end of the connecting pipe 2; And a throttle connecting pipe 9 extending toward.

The connecting pipe 2 is formed to be curved so as to surround the upper part of the surge tank portion 5 from the rear of the surge tank portion 5 to the upper front thereof, and is fully connected to both side portions of each of the connecting pipes 2. A welded vertical flange portion 201 is formed on the tip end surface of the pipe 2 so as to be joined to the extended pipe 3 and
In the lower part, the welding horizontal flange portion 202 has a plurality of connecting pipes 2.
It is formed so as to surround the circumference of.

The extended pipe 3 is provided with a plurality of pipe portions so as to communicate with the respective pipes of the connecting pipe 2, and has the above-mentioned mounting flange portion 4 for connecting the pipe portions to the front, and a plurality of connection portions to the rear. A welding flange portion 301 facing the pipe 2 is formed. The welding flange portion 301 is connected to a welding vertical flange portion 602 of the upper tank portion 6, which will be described later, and the surge tank portion 5 includes the upper tank portion 6 including the throttle connecting pipe 8.
A lower tank portion 7 formed by closing both ends, a communication passage portion 8 disposed behind the upper tank portion 6 and the lower tank portion 7 and connecting the plurality of connecting pipes 2 to the lower tank portion 7,
It is formed by being divided into.

A welded lateral flange portion 601 is formed on the lower surface of the upper tank portion 6 over the entire circumference, and a lower portion of the connecting pipe 2 is arranged on the rear (right side in FIG. 1) side. A welded vertical flange portion 602 is formed to extend upward along the connecting pipe 2. The welding vertical flange portion 602 extends upward along the curved connecting pipe 2, and the upper end thereof is integrally connected to the welding flange portion 301 of the extending pipe 3.

A welding upper flange portion 701 is formed on the upper surface of the lower tank portion 7 over the entire circumference of the upper surface, and is integrally joined to the welding lateral flange portion 601 of the upper tank portion 6 by vibration welding. . Further, a lower welding flange portion 702 is formed on the lower surface of the lower tank portion 7 over the entire lower surface thereof, and is vibratingly welded to a lateral welding flange portion 801 formed on the entire upper surface of the communication passage portion 8 to form a lower portion. It is integrally joined to the tank portion 7.

The welding lateral flange portion 202 of the connecting pipe 2
Is integrally joined by vibration welding to an extension portion extending rearward from the welding horizontal flange portion 601 of the upper tank portion 6, and the welding vertical flange portion 201 of the connecting pipe 2 is a welding vertical flange portion of the upper tank portion 6. The portion 602 is integrally joined by vibration welding.

As a result, the connecting pipe 2 and the upper tank portion 6, the upper tank portion 6 and the lower tank portion 7, and the lower tank portion 7 and the communication passage portion 8 are integrally joined to each other with the inside hollow. The opening formed in the mounting flange portion 4 of the extension pipe 3 corresponding to the connecting pipe 2, each connecting pipe 2 and the surge tank portion 5, and the opening formed at one end of the throttle connecting pipe 9 can be made to flow. ing.

On the other hand, a part of the welding horizontal flange portions 601 and 701 (on the side opposite to the throttle) and the welding vertical flange portion 2 of the connecting pipe 2 at the joint surface between the upper tank portion 6 and the lower tank portion 7.
As shown in FIG. 3, at 01, a ventilation passage 10 for communicating with the surge tank portion 5 for taking out negative pressure is formed.

The ventilation passage 10 enters the welding lateral flange portion from inside the surge tank portion 5 (first ventilation passage 11) and passes through the inside of the welding lateral flange portion (second ventilation passage 12) to the outside from the welding lateral flange portion. It is formed so as to communicate with a pipe-shaped negative pressure take-out port (third ventilation passage 13) that is formed toward one side. Although the path of the air passage 10 does not limit its location, it is desirable that the negative pressure take-out port is set at a position that is not limited by the arrangement position of the engine mounted parts arranged around the intake manifold 1.

In the embodiment, the ventilation passage 10 is shown in FIG.
As shown in FIGS. 5A to 5C, the upper tank portion 6 formed at the left side of the connecting pipe 2A arranged at the leftmost end position (lower left position in FIG. 1) opposite to the throttle side of the plurality of connecting pipes 2. It is formed on the welding horizontal flange portion 601 and the welding vertical flange portion 201 of the connecting pipe 2.

In forming the ventilation passage 10 at this position, a part of the welded vertical flange portion 601 of the upper tank portion 6 and the welded lateral flange portion 701 of the lower tank portion 7 is partially cut into the wide portion 60.
3 and 703, the welding vertical flange portion 602 of the upper tank portion 6 and a part of the welding vertical flange portion 201 of the connecting pipe 2 are formed in the wide portions 604 and 203, and the welding lateral flange portion of the upper tank portion 6 side is formed. A boss portion 605 is provided on an upper portion of the wide portion 603 of the portion 601 and a welding vertical flange portion 20 of the connecting pipe 2A.
The boss portion 204 is formed on the rear side of the wide portion 203 of No. 1.

Then, a first ventilation passage 11 is formed from inside the surge tank portion 5 toward the inside of the wide portion 603 of the welding lateral flange portion 601 of the upper tank portion 6, and inside the boss portion 605 of the upper tank portion 6. , The second ventilation passage 12A which is orthogonal to the first ventilation passage 11 and communicates with the first ventilation passage 11 is formed in the lateral direction, and the connection pipe 2A is formed.
In the boss portion 204, a second ventilation passage 12B is formed in the vertical direction so as to communicate directly with the second ventilation passage 12A. And
Third ventilation passage 1 which communicates orthogonally with second ventilation passage 12B
3 is formed laterally inside the pipe portion 205 that is formed outward at the upper end of the boss portion 204. The third ventilation passage 13 is formed as, for example, a negative pressure take-out port for taking out a negative pressure for a master brake, a pressure switch, or the like.

The pipe portion 205 may be formed integrally with the welded vertical flange portion 201 of the connecting pipe 2.

Further, the first ventilation passage 11 is not limited to the welding flange portion 601 of the upper tank portion 6, but may be formed in, for example, the welding upper flange portion 701 of the lower tank portion 7, or the upper portion. It may be formed on the wall portion of either the tank portion 6 or the lower tank portion 7. If the first ventilation passage 11 is formed in the welding upper flange portion 701 of the lower tank portion 7, the second ventilation passage 12A has a wide portion of the welding upper flange portion 701 of the lower tank portion 7. It will be formed in the boss portion formed in 703.

Further, as shown in FIG. 6, the second ventilation passage 12 is formed in the longitudinal direction in the boss portion 605 formed on the welding lateral flange portion 601 of the upper tank portion 6, as shown in FIG.
A and the second air passage 12B may be formed laterally on the boss portion 605 and directly communicate with the second air passage 12A. This second ventilation path 12B is, of course,
It will be extended toward the 3rd ventilation path 13 formed in the pipe part 205. In this case, the boss portion 204 formed on the welded vertical flange portion 201 of the connecting pipe 2A may be omitted because the ventilation passage is not formed.

In the intake manifold 1 described above, the air flowing in from the throttle side enters the throttle connecting pipe 9 and is branched from the lower tank portion 7 of the surge tank portion 5 at each connecting passage portion 8 to each connecting pipe 2. It will flow and be supplied to the engine room.

At this time, when a negative pressure is formed in the master brake or the pressure sensor, it is performed by inhaling air from the master brake or the pressure sensor toward the surge tank portion 5, and from a hose connected from the master brake or the pressure sensor. The sucked air passes from the third ventilation passage 13 formed in the pipe portion 205 to the second ventilation passage 12B formed in the welding vertical flange portion 201 of the connecting pipe 2, and passes through the welding horizontal flange of the upper tank portion 6. Through the second air passage 12A formed in the portion 601 and the first welding lateral flange portion 601
The air will flow into the upper tank portion 6 from the air passage 11.

As described above, the intake manifold 1
However, for example, the welded lateral flange portions 601 made of resin are used.
And a lower tank portion 701 including a welding upper flange portion 701, which are formed integrally by joining the welding flange portions 601 and 701 to each other. A part of the 601 and 701 is formed wide to communicate with the surge tank 5 first.
Hose for negative pressure extraction by arranging the above-mentioned ventilation passage 11, the second ventilation passage 12 communicating with the first ventilation passage 11, and the third ventilation passage 13 communicating with the second ventilation passage 12. It is not necessary to provide a pipe for separately taking out from the recessed position. Therefore, it is not necessary to attach a negative pressure extracting hose to the surge tank that interferes with the engine-mounted components arranged around the connecting pipe 2 and the surge tank portion 5, so that it is possible to provide an inexpensive intake manifold. it can.

That is, when the surge tank portion 5 is molded, a ventilation passage communicating with the negative pressure take-out port is provided in the welding flange portion of the surge tank portion 5 in advance, so that the hose directly piped from the negative pressure side is subjected to negative pressure. It can be attached to the take-out port (third ventilation passage 13). Moreover, the negative pressure take-out port can be set in a wide area of the outer peripheral position of the surge tank where there are no interfering parts. For example, it may be arranged on the rear side of the connecting pipe 2.

Further, by forming the pipe portion 205 forming the third ventilation passage 13 integrally with the welded vertical flange portion 201 of the connecting pipe 2, a more inexpensive intake manifold can be obtained without attaching a new hose. It can be provided and can be set up in a large area with no interfering parts outside the surge tank.

[Brief description of drawings]

FIG. 1 is a perspective view showing an intake manifold according to one embodiment of the present invention.

FIG. 2 is a view on arrow II in FIG.

FIG. 3 is a perspective view showing a partial cross section showing a ventilation path in FIG.

FIG. 4 is a view on arrow IV in FIG.

5 is a sectional view taken along line VV in FIG.

FIG. 6 is a front sectional view showing another form of the ventilation passage in FIG.

FIG. 7 is a perspective view showing a conventional intake manifold.

FIG. 8 is a perspective view showing another conventional intake manifold.

[Explanation of symbols]

1 intake manifold 2 connecting pipe 5 surge tank 6 Upper tank 7 Lower tank 10 air passage 11 First ventilation passage 12A Second ventilation passage 12B Second ventilation passage 13 Third ventilation path (negative pressure extraction port) 201 welded vertical flange 601 Welded lateral flange 602 welded vertical flange 701 Welding upper flange

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Masao Ino             1-1, Showa-cho, Kariya city, Aichi stock market             Inside the company DENSO (72) Inventor Tetsuji Yamanaka             1-1, Showa-cho, Kariya city, Aichi stock market             Inside the company DENSO

Claims (3)

[Claims] 1. An intake manifold comprising a plurality of connecting pipes extending toward an engine room and a surge tank connected to the connecting pipes, wherein a negative pressure take-out port is integrally formed on an outer peripheral portion of the surge tank. And a ventilation passage communicating with the negative pressure taking-out port is formed in the wall portion of the surge tank. 2. An intake manifold comprising a plurality of connecting pipes extending toward the engine room and a surge tank connected to the connecting pipes, wherein an upper tank and a lower tank are joined to the surge tank. A welding flange portion is formed, and a second ventilation passage communicating with the surge tank and a second ventilation passage communicating with the first ventilation passage are formed in a part of the welding flange portion. An intake manifold, and a third ventilation path communicating with the second ventilation path is provided toward the outside of the surge tank. 3. The intake manifold according to claim 2, wherein the third ventilation passage is a negative pressure take-out port formed integrally with the outer peripheral portion of the surge tank.