JP2018162780A - Seal member and intake manifold - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seal member improving sealability of each of suction pipes at outlet ports of a plurality of suction pipes adjacent to one another with narrow intervals: and to provide an intake manifold.SOLUTION: An intake manifold 1 includes: at least two suction pipes 32, 33 adjacent to each other at outlet parts 36, 37; and a mounting flange 41 formed to the outlet parts 36, 37 and having a mating surface 42 between suction ports 82, 83. A seal member 51 is attached to the mating surface 42. The seal member includes: an annular frame body 52 consisting of an elastic body and having an opening part 55; and a partition plate 61 which is disposed so as to be connected to the inner wall of the frame body and partition the opening part of the frame body and is formed so as to have thickness thinner than that in a direction parallel to the mating surface of the frame body. Communication between the outlet parts of the suction pipes can be suppressed by the partition plate inserted into a partition groove.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a seal member and an intake manifold. More specifically, the present invention relates to a seal member and an intake manifold that enhance the sealing performance of each intake pipe at the outlets of a plurality of intake pipes that are adjacent to each other at a narrow interval.

As a conventional intake manifold, for example, a synthetic resin intake manifold in which a plurality of intake pipes connecting a surge tank and a plurality of intake ports of an internal combustion engine are integrally formed is known (for example, Patent Documents). 1).
In such an intake manifold, a portion connected to the intake port is a flange, and a seal member for preventing leakage of intake air flowing in the intake pipe is disposed on the flange. The sealing member is an elastic body such as rubber or synthetic resin, and a certain thickness is required to maintain the performance as a sealing material.

JP 2002-70671 A

Many of the intake manifolds attached to the engine are made of synthetic resin, and a plurality of intake pipes that supply intake air from the surge tank are integrally formed. Each intake pipe is connected to a plurality of intake ports for introducing intake air into the combustion chamber of the engine. In order to connect such a plurality of intake pipes to the engine, the intake manifold is provided with a mounting flange serving as a mating surface with the intake port on the engine side. A sealing member made of an elastic body is disposed on a mating surface between the outlet portion of the intake pipe and the intake port formed on the mounting flange in order to prevent leakage of intake air supplied from each intake pipe. However, depending on the engine, it is necessary to provide a plurality of intake ports adjacent to each other, and the interval between adjacent intake ports becomes narrow. Correspondingly, the interval between adjacent intake pipes of the intake manifold is also reduced. For this reason, in the mounting flange, the outlet portions of the intake pipes are close to each other, and the pipe wall of the adjacent intake pipe may be constituted by one partition wall.
However, when the outlet portion of the intake pipe is close as described above, it becomes impossible to dispose a seal member made of an elastic material on the mating surface with the intake port. For this reason, there is a risk that intake air leaks between adjacent intake pipes on the mating surface with the intake port. In addition, when a valve or the like is provided in the intake pipe and the intake air amount is controlled by the valve or the like, there is a problem that it is difficult to control the target intake air amount due to the ventilation generated between adjacent intake pipes. It was.

  The present invention has been made in view of the above situation, and an object of the present invention is to provide a seal member and an intake manifold that enhance the sealing performance of each intake pipe at the outlets of a plurality of intake pipes that are adjacent to each other at a narrow interval. To do.

In order to solve the above problem, the invention according to claim 1 is a seal member mounted in a groove provided on a mating surface between an intake manifold and an intake port for supplying intake air to a combustion chamber of an engine. An annular frame made of an elastic body and having an opening, and is arranged to be connected to the inner wall of the frame and to partition the opening of the frame, and is parallel to the mating surface of the frame And a partition plate formed thinner than the thickness in the direction.
According to a second aspect of the present invention, in the first aspect of the present invention, the end surface of the partition plate on the intake port side is made a predetermined length lower than the end surface of the frame on the intake port side. It is a summary.
The invention according to claim 3 is the invention according to claim 1 or 2, wherein the frame body has a belt portion formed so as to cover an end surface of the partition plate on the intake port side. And
The invention according to claim 4 comprises at least two intake pipes close to each other at the outlet portion, and a mounting flange formed on the outlet portion and having a mating surface with the intake port. An intake manifold having the sealing member described above attached to the mating surface, wherein the mounting flange is formed so as to surround the two intake pipes, and the groove portion to which the frame of the sealing member is attached; And a partition groove into which the partition plate of the seal member is inserted so as to partition between the outlet portions of the two intake pipes.
According to a fifth aspect of the present invention, in the invention of the fourth aspect, the end surface of the partition plate on the intake port side is made lower by a predetermined length than the end surface of the frame on the intake port side. It is a summary.
The invention according to claim 6 is the invention according to claim 4 or 5, wherein the band portion of the seal member is formed so as to cover an end surface of the partition plate on the intake port side. The gist.
The invention according to claim 7 is the invention according to any one of claims 4 to 6, wherein the two intake pipes supply intake air for introduction into different combustion chambers to the intake port. And
The invention according to claim 8 is summarized in that, in the invention according to claim 7, the two intake pipes are provided with a valve for controlling the amount of intake air.
The invention according to claim 9 is characterized in that, in the invention according to claim 8, the valve is closed when the engine is less than a predetermined rotational speed and opened at the predetermined rotational speed or more.

  The seal member of the present invention is a seal member that is attached to a groove provided on a mating surface between an intake manifold and an intake port for supplying intake air to a combustion chamber of an engine, and is made of an elastic body and has an opening. An annular frame and a partition plate connected to the inner wall of the frame and arranged to partition the opening of the frame and formed thinner than a thickness in a direction parallel to the mating surface of the frame And, at the outlet portion of the intake pipe disposed in the vicinity, the whole is sealed with a frame made of an elastic body and having a certain thickness, and between the outlet portions of adjacent intake pipes. Communication can be suppressed by the partition plate. Even when the pipe wall between adjacent intake pipes at the outlet is shared by one thin partition wall, it is not possible to secure a width for arranging a seal material of a certain thickness between the partition wall and the engine. And the ventilation between the exit parts of each intake pipe can be suppressed by the thin partition plate.

When the end face of the partition plate on the intake port side is lower than the end face of the frame body on the intake port side by a predetermined length, the frame body is pressed and compressed on the mating surface with the engine. In this state, since the end face of the partition plate contacts the engine side, ventilation between the outlet portions of the adjacent intake pipes can be effectively suppressed. Moreover, since an excessive force is not applied to the partition plate until the frame is compressed, it is possible to prevent abnormal deformation and breakage of the partition plate.
When the frame body has a band portion formed so as to cover the end surface of the partition plate on the intake port side, the end surface of the partition plate contacts the engine side with the band portion made of an elastic body in between. Therefore, it is possible to suppress the gap between the end face of the partition plate and the engine, and it is possible to more effectively suppress the ventilation of the outlet portion of the intake pipe that is close to the engine. In addition, it is possible to prevent an excessive force from being applied to the partition plate by the band portion, and it is possible to prevent abnormal deformation or breakage of the partition plate.

  The intake manifold according to the present invention includes at least two intake pipes close to each other at an outlet portion, and a mounting flange formed on the outlet portion and having a mating surface with an intake port, according to any one of claims 1 to 3. An intake manifold having a sealing member mounted on the mating surface, wherein the mounting flange is formed so as to surround the two intake pipes, and a groove portion to which the frame body of the seal member is mounted; And a partition groove into which the partition plate of the seal member is inserted, so that the seal member is optimally mounted on the mating surface with the intake port side of the mounting flange. can do. Thereby, the whole exit part of the intake pipe which adjoined can be sealed with the frame which consists of an elastic body attached to the groove part. Further, communication between the outlet portions of the intake pipe can be suppressed by the partition plate inserted in the partition groove. Even if the gap between the outlets of each intake pipe is formed by a thin partition wall and a certain thickness of seal material cannot be secured between the partition wall and the engine, the partition is thin. Ventilation between the outlet portions of the intake pipes can be suppressed by the plate.

When the end surface of the partition plate on the intake port side is lower than the end surface of the frame on the intake port side by a predetermined length, the intake manifold is attached to the engine and tightened to seal the sealing member In the state where the frame body is compressed, the end face of the partition plate abuts on the engine side, so that ventilation between the outlet portions of the adjacent intake pipes can be effectively suppressed. Moreover, since an excessive force is not applied to the partition plate until the frame is compressed, it is possible to prevent abnormal deformation and breakage of the partition plate.
When the band portion of the seal member is formed so as to cover the end surface of the partition plate on the intake port side, the end surface of the partition plate hits the engine side with the band portion made of an elastic body in between. As a result, the gap between the end face of the partition plate and the engine can be suppressed, and the ventilation of the outlet portion of the intake pipe that is closer to the engine can be suppressed more effectively. In addition, it is possible to prevent an excessive force from being applied to the partition plate by the band portion, and it is possible to prevent abnormal deformation or breakage of the partition plate.

When the intake pipes to be introduced into different combustion chambers are supplied to the intake ports, the two intake pipes prevent leakage of intake air to be supplied from the intake pipes to the combustion chambers by the partition plate of the seal member. Can be suppressed.
In the case where the two intake pipes are provided with a valve for controlling the intake air amount that flows in, the controllability of the intake air amount by the valves can be improved. That is, since the air intake pipes are prevented from venting to the outside and between the air intake pipes by the seal member, it is possible to accurately control the intake air amount to be a target by the valve.
When the engine is closed at less than a predetermined number of revolutions and is opened at the predetermined number of revolutions or more, the intake members of the intake pipes and the ventilation between the intake pipes are suppressed by a seal member. Therefore, the target intake air amount when the valve is opened can be introduced into the combustion chamber.

The present invention will be further described in the following detailed description with reference to the drawings referred to, with reference to non-limiting examples of exemplary embodiments according to the present invention. Similar parts are shown throughout the several figures.
It is a perspective view for demonstrating the intake manifold which arrange | positioned the sealing member. It is a perspective view which shows the external appearance of the sealing member which concerns on an Example. It is AA sectional drawing of the sealing member of FIG. It is a front view which shows the attachment flange which mounted | wore with the sealing member. It is AA sectional drawing in FIG. It is BB sectional drawing in FIG. It is AA sectional drawing in the state which attached the attachment flange shown in FIG. 4 to the engine. It is BB sectional drawing in the state which attached the attachment flange shown in FIG. 4 to the engine. It is a perspective view which shows the external appearance of the sealing member which has a belt | band | zone part. It is a fragmentary sectional view showing the state where the seal member which has a belt part is attached to the attachment flange. It is a fragmentary sectional view which shows the state which attached the attachment flange shown in FIG. 10 to the engine in which the intake port was formed. It is a typical fragmentary sectional view which shows the valve (closed state) provided in the intake pipe. It is a typical fragmentary sectional view which shows the valve (open state) provided in the intake pipe. It is a front view which shows the seal member integrated with the seal member of the other intake pipe.

  The items shown here are for illustrative purposes and exemplary embodiments of the present invention, and are the most effective and easy-to-understand explanations of the principles and conceptual features of the present invention. It is stated for the purpose of providing what seems to be. In this respect, it is not intended to illustrate the structural details of the present invention beyond what is necessary for a fundamental understanding of the present invention. It will be clear to those skilled in the art how it is actually implemented.

  FIG. 1 shows an example of an intake manifold for supplying intake air to a combustion chamber of an engine. The intake manifold 1 is made of a synthetic resin such as polyamide resin (nylon or the like), and supplies the air-fuel mixture in the surge tank 13 to four intake ports (not shown) of the engine. For this reason, the intake manifold 1 includes four intake pipes 31 to 34 arranged in a row. A mounting flange 41 is provided on the outlet side of the intake pipe, and is attached to an engine in which an intake port is formed by the mating surface 42. Each intake pipe and each intake port are connected with a seal member interposed therebetween. At the outlet portions of the intake pipes 31 and 34 that are disposed apart from the other intake pipes, annular seal members 59 made of an elastic body are respectively attached.

  In the intake manifold 1 of this example, since the two intake pipes 32 and 33 are provided at a narrow interval, the outlet portions 36 and 37 are close to each other. The wall surfaces of the intake pipes 32 and 33 are configured such that the partition walls 43 are shared between the outlet portions 36 and 37. That is, on the mating surface 42 of the mounting flange 41, the outlet portions 36 and 37 of the intake pipe are opened close to each other with the thin partition wall 43 interposed therebetween. Since the partition wall 43 is so thin that an elastic seal member cannot be installed, one seal member 51 is attached to the outlet portions 36 and 37 of the two intake pipes.

(Seal member)
Hereinafter, taking the intake manifold (1) as an example, the seal member (51) for suppressing communication between the outlet portions (36, 37) of the two adjacent intake pipes (32, 33) will be described. In addition, the code | symbol in the parenthesis of each structure described in the following embodiment shows a corresponding relationship with the specific structure mentioned in an Example.
The seal member (51) according to the present embodiment is used by being mounted in a groove provided on a mating surface (42) between the intake manifold (1) for supplying intake air to the combustion chamber of the engine and the intake port. It is a sealing member. The intake manifold (1) is attached to an engine (81) in which intake ports (82, 83) are formed with a seal member (51) interposed therebetween (see FIG. 8).
The seal member (51) is connected to the annular frame (52) made of an elastic body and having an opening (55), and the inner wall (53) of the frame (52), and the opening of the frame (52). (55) and a partition plate (61) formed so as to be thinner than a thickness (T) in a direction parallel to the mating surface (42) of the frame (52) (see FIG. 2). ). The openings (55) partitioned into two by the partition plate (61) are formed so as to correspond to the outlet portions (36, 37) of the intake pipe, respectively.

  The material of the frame (52) is not limited as long as it is an elastic body, and for example, an elastomer such as rubber or a synthetic resin can be employed. The size and shape of the frame (52) are not particularly limited, and can be set according to the size, shape, arrangement, and the like of the outlet portions (36, 37) and the mounting flange (41) close to the intake pipe. The width of the frame body (52) in the direction parallel to the mating surface (42) is T (see FIG. 3A).

Since the partition plate (61) does not need to be compressed and deformed during use unlike the frame (52), the partition plate (61) can be made of a hard material having a smaller elastic modulus than the frame (52). Preferably, a metal such as stainless steel or aluminum, a hard synthetic resin, or the like can be used. By using these hard materials, a gap is not generated between the outlet portions (36, 37) of the adjacent intake pipe without causing deformation such as bending or twisting even if it is thinner than the frame (52). can do.
The specific configuration of the partition plate (61) may be determined as appropriate, for example, a strip-shaped partition plate main body (62) and an inner wall of the frame (52) provided at both ends of the partition plate main body (62). And end portions (63, 64) connected to (53), which can be integrally formed (see FIG. 2).
The thickness of the partition plate body (62) is made thinner than the width T of the frame body (52) (see FIG. 3A). Further, the thickness of the partition plate body (62) can be appropriately set in relation to the width of the partition groove (47) provided in the mounting flange (41) (see FIG. 6). The connection method between the partition plate (61) and the inner wall (53) of the frame (52) is not particularly limited.

The partition plate 61 can be provided in various ways. For example, the end surface (61b) of the partition plate (61) on the intake port side is preferably formed lower by a predetermined length d than the end surface (52b) of the frame (52) on the intake port side (FIG. 3). (See (a)). In this way, the end face (61b) of the partition plate abuts the engine side in a state where the frame (52) is pressed and compressed with the engine (81). 36, 37) can be suppressed. Moreover, since an excessive force is not applied to the partition plate (61) until the frame (52) is compressed, the abnormal deformation and breakage of the partition plate (61) can be prevented. The length d may be set according to the dimensions and elasticity of the frame body 52.
The engine (81) side on which the intake port (82, 83, etc.) is formed as viewed from the sealing member (51) is referred to as the “intake port side” or “engine side”. That is, the “intake port side” (engine side) is the side opposite to the attachment surface of the seal member (51) to the attachment flange (41).

  Further, the frame (52) may have a band portion (67) formed so as to cover the end surface (61b) of the partition plate (61) on the intake port side (FIG. 3B). (See FIG. 9). In this way, the end surface (61b) of the partition plate hits the engine side across the belt portion (67) made of an elastic body. It is possible to suppress the air flow between the outlet portions (36, 37) of the adjacent intake pipes more effectively. Moreover, it is possible to prevent an excessive force from being applied to the partition plate by the belt portion (67), and it is possible to prevent abnormal deformation and breakage of the partition plate.

(Intake manifold)
The intake manifold (1) according to the present embodiment is formed in at least two intake pipes (32, 33) close to the outlet (36, 37) and the outlet (36, 37), and the intake ports (82, 83). A mounting flange (41) having a mating surface (42) with the sealing member (51) is mounted on the mating surface (42).
For this reason, the mounting flange (41) is formed so as to surround the outlet portions (36, 37) of the two intake pipes (32, 33), and the groove portion to which the frame (52) of the seal member (51) is attached. (46) and a partition groove (47) formed so as to partition between the outlet portions (36, 37) of the two intake pipes (32, 33) and into which the partition plate (61) of the seal member (51) is inserted. (Refer to FIGS. 4 to 6).

The mounting flange (41) is formed integrally with the intake manifold (1), and has outlets (36, 2) of two intake pipes (32, 33) connected to the intake ports (82, 83) of the engine (81). 37) is formed. The mating surface (42) of the mounting flange (41) is formed so as to surround the entire outlet portions (36, 37) of the two intake pipes, and the frame (52) of the seal member (51) is attached. A groove (46) is provided.
Further, in the outlet portions (36, 37) of the intake pipe, the two outlet portions (36 and 37) are partitioned so as to share one partition wall (43). Since the two intake ports (82, 83) are adjacent to each other at a narrow interval, the two outlet portions (36, 37) are close to each other, and the partition wall (43) is thin. For this reason, the width of the end surface (44) on the engine (81) side of the partition wall (43) is narrowed, and an elastic body having a width equivalent to the thickness T of the frame body (52) of the seal member (51) is fitted. For this reason, it is difficult to form a groove having a width necessary for this purpose. Accordingly, the mounting flange (41) is formed so as to partition between the outlet portions (36 and 37) of the two intake pipes, and the partition groove (47) into which the partition plate (61) of the seal member (51) is inserted. ) Is provided. That is, the partition groove (47) is formed on the end surface (44) of the partition wall (43) on the engine (81) side.

When the intake manifold (1) is attached to the engine (81) and tightened, the frame (52) of the seal member (51) attached to the groove (46) of the attachment flange (41) is compressed by pressing, and the frame ( 52) is in close contact with the engine (81). Thereby, the whole exit part (36, 37) of the intake pipe which adjoined can be sealed by the frame (52) which consists of an elastic body attached to the groove part (47).
Further, as the frame (52) is compressed, the partition plate (61) of the seal member (51) inserted into the partition groove (47) of the mounting flange (41) comes into contact with the engine (81) side. Thereby, the communication between the outlet portions (36 and 37) of the two intake pipes can be suppressed by the partition plate (61). Even when the width of the end surface (44) on the engine (81) side of the partition wall (43) is narrow and a groove portion for attaching a sealing material made of an elastic body cannot be formed, the partition plate (61) is hard and thin. The ventilation between the outlet portions (36 and 37) of the intake pipe can be suppressed.

  Hereinafter, the seal member and the intake manifold will be described more specifically with reference to the drawings.

(Seal member)
FIG. 2 shows an external view of the sealing member 51 as seen from the intake port side (engine 81 side). The seal member 51 is made of an elastic body and has an annular frame 52 having an opening 55, and is connected to the inner wall 53 of the frame 52 and arranged to partition the opening 55 of the frame 52. And a partition plate 61 formed thinner than the thickness T of the frame body 52 in the parallel direction. The openings 55 divided into two by the partition plate 61 are formed so as to correspond to the outlet portions (36, 37) of the intake pipe, respectively (see FIG. 1).
The seal member 51 is used so that one end surface 51 b side thereof is in contact with the engine 81. The other end surface 51 a side of the seal member 51 is mounted in a groove (a groove portion 46 and a partition groove 47) formed in the mounting flange 41 of the intake manifold 1. Both end surfaces (51a, 51b) of the seal member 51 are parallel to the mating surface 42 of the mounting flange 41. The thickness of the frame 52 in the direction is T. The strip-shaped partition plate 61 is provided in a direction perpendicular to the mating surface 42.

  The partition plate 61 can be formed using a metal, a hard synthetic resin, or the like. The partition plate 61 of this example includes a strip-shaped partition plate main body 62 and end portions (63, 64) connected to the inner wall 53 of the frame body 52. The end portions (63, 64) of the partition plate 61 can be formed integrally with the partition plate body 62 so as to be bent from the partition plate body 62. The size, shape, and the like of the end portions (63, 64) of the partition plate 61 are not limited as long as they can be connected to the inner wall 53 of the frame body 52. For example, the metal partition plate 61 and the resin frame 52 can be integrated by insert molding or the like. In addition, a groove or the like for fitting the end portions (63, 64) of the partition plate 61 may be provided in the frame body 52, and the end portions (63, 64) may be fitted.

The partition plate 61 can be provided in various ways. For example, FIG. 3A represents the AA cross section of FIG. The partition plate 61 is formed to be thinner than the thickness T of the frame body 52. In a state where the intake manifold 1 is attached to the engine 81, the end face 61a side of the partition plate 61 is inserted into the partition groove 47 formed in the attachment flange 41, and the end face 61b side comes into contact with the engine 81 (see FIG. 8).
Further, as shown in the figure, the end surface 61b of the partition plate 61 on the intake port side (engine 81 side) is made lower by a length d than the end surface 52b of the frame 52 on the intake port side. ing. In this way, the end face 61b of the partition plate 61 is brought into contact with the engine 81 side in a state where the frame body 52 made of an elastic body is pressed and compressed between the intake manifold 1 and the engine 81. be able to.

Moreover, as shown in FIG.3 (b), the frame 52 may have the band part 67 formed so that the end surface 61b of the partition plate 61 used as the intake port side might be covered. In this way, since the end surface 61b of the partition plate 61 contacts the engine side with the band portion 67 made of an elastic body interposed therebetween, the gap between the end surface 61b of the partition plate 61 and the engine 81 is suppressed. it can.
The band portion 67 can have a predetermined width with a position in contact with the end surface 61 b of the partition plate 61 as a center. For example, the width of the band portion 67 can be less than the width (thickness) of the end face 44 of the partition wall 43 (see FIG. 10). Moreover, the thickness of the belt | band | zone part 67 can be set suitably.

(Intake manifold)
FIG. 4 is a front view illustrating the mounting flange 41 (on the mating surface 42 side) of the intake manifold 1 to which the seal member 51 is attached. 5 is a cross-sectional view taken along line AA in FIG. 4, and FIG. 6 is a cross-sectional view taken along line BB. 5 and 6 show a state in which the seal member 51 is only attached to the mating surface 42 of the mounting flange 41, that is, a state in which the seal member 51 is not compressed by pressing.
The intake manifold 1 has a mating surface 42 between two intake pipes (32, 33) adjacent to each other at the outlet (36, 37) and an intake port (82, 83) formed at the outlet (36, 37). The seal member 51 is mounted on the mating surface 42.
In order to mount the seal member 51, the mounting flange 41 is formed so as to surround the outlet portions (36, 37) of the two intake pipes (32, 33) and the groove portion 46 to which the frame body 52 of the seal member 51 is attached. And a partition groove 47 formed so as to partition between the outlet portions (36, 37) of the two intake pipes (32, 33) and into which the partition plate 61 of the seal member 51 is inserted.

  As shown in FIG. 6, in a state where the frame body 52 is not compressed between the intake manifold 1 and the engine 81, the end surface 61 b of the partition plate 61 is lower than the end surface 52 b of the frame body 52 by a predetermined length d. Has been. The length d is a length obtained by subtracting a length necessary for pressing the end surface 61 b of the partition plate 61 against the engine 81 from a length by which the frame body 52 is compressed when the intake manifold 1 is fastened to the engine 81. It is.

7 is a cross-sectional view taken along the line AA in a state where the mounting flange 41 shown in FIG. 4 is attached to the engine 81 having the intake ports (82, 83), and FIG. 8 is a cross-sectional view taken along the line BB.
When the attachment flange 41 is attached to the engine 81 with the seal member 51 interposed therebetween, the frame body 52 of the seal member 51 made of an elastic body is compressed in a direction in which the frame body 52 is accommodated in the groove portion 46 provided in the attachment flange 41. As a result, the intake pipes (32, 33) of the intake manifold 1 and the intake ports (82, 83) of the engine 81 communicate with each other, and the end surface 52 b of the frame body 52 is in close contact with the engine 81.

  Further, as the frame body 52 is compressed between the mounting flange 41 and the engine 81, the partition plate 61 provided on the seal member 51 is pushed toward the bottom of the partition groove 47 as shown in FIG. It is. Since the partition plate 61 made of metal or the like is not deformed, the end surface 61 b of the partition plate 61 is pressed against the partition wall on the engine 81 side that separates the intake ports 82 and 83. Thereby, ventilation between the intake pipe 32 and the intake port 82 and the intake pipe 33 and the intake port 83 is suppressed.

  As shown in FIG. 8, the partition groove 47 is preferably formed deeper than the end surface 61a of the partition plate 61 when the frame body 52 is compressed by pressing from the engine 81 side. If comprised in this way, after the end surface 61b of the partition plate 61 will contact | abut to the engine 81 side, the partition plate 61 will be pushed in so that it may sink into the clearance gap of the bottom side of the partition groove 47, and the end surface 61b of the partition plate 61 will be engine It is press-contacted to the 81 side. Further, it is possible to prevent the partition plate 61 and the partition groove 47 from being deformed by applying an excessive force. Even if the end surface 61 a of the partition plate 61 does not reach the bottom of the partition groove 47, if the partition plate 61 is inserted into the partition groove 47 with a certain length, airflow through the partition groove 47 can be suppressed. it can.

As shown in FIG. 9, a band portion 67 having a predetermined width covering the end surface 61 b of the partition plate 61 can be provided on the end surface 52 b side of the frame body 52 of the seal member 51. FIG. 10 shows a state where the seal member 51 provided with the band portion 67 is attached to the mounting flange 41. The partition plate 61 of the seal member 51 is inserted into a partition groove 47 formed in the end surface 44 of the partition wall 43 of the mounting flange 41, and a band portion 67 is in contact with the end surface 61 b of the partition plate 61.
As a material of the band portion 67, an elastic body such as an elastomer such as rubber or a synthetic resin can be used. The band portion 67 can be formed integrally with the frame body 52 using the same or different material as the frame body 52. As a result, the end surface 61b of the partition plate 61 comes into contact with the engine 81 with the elastic band 67 interposed therebetween, so that the gap between the partition plate 61 and the engine 81 is suppressed and excessive force is applied to the partition plate 61. Can be prevented.

  FIG. 11 shows a state in which the mounting flange 41 to which the seal member 51 of the previous figure is mounted is mounted on the engine 81. The frame body 52 of the seal member 51 is fitted into the groove portion 46 provided in the mounting flange 41 and is compressed so as to be accommodated in the groove portion 46, and the end surface 52 b is in close contact with the engine 81. Further, as the frame body 52 is compressed, the band portion 67 comes into contact with the engine 81 and is compressed. The partition plate 61 is pushed by the engine 81 with the belt portion 67 interposed therebetween, and moves downward in the partition groove 47. As a result, the intake pipes (32, 33) and the intake ports (82, 83) are communicated with each other, and ventilation at the mating surface 42 between the intake pipes is suppressed.

  The seal structure including the partition plate 61 and the partition groove 47 can be easily applied even when the mounting flange 41 is made of synthetic resin. Even if the material of the mounting flange 41 is a synthetic resin, it is possible to form a narrow partition groove 47 on the end face 44 of the narrow partition wall 43. For example, if the width of the end surface 44 of the partition wall 43 is about 3 to 5 mm, the partition groove 47 having a width into which the partition plate 61 with a thickness of about 1 mm can be inserted can be formed. The dimension of the partition 61 in the height direction (perpendicular to the mating surface 42) can be set to 3 to 4 mm, for example.

Since intake manifold 1 suppresses intake air leakage for each intake pipe as described above, adjacent two intake pipes (32, 33) receive intake air for introduction into different combustion chambers. 82, 83).
FIG. 12 is a diagram schematically showing the valves 38 and 39 (closed state) provided in the adjacent intake pipes 32 and 33. The control means provided separately can control the intake air amount by the valves 38 and 39. Conventionally, when a valve or the like is provided in the intake pipe to control the intake air amount introduced into the combustion chamber, control is performed so that the target intake air amount is obtained by intake air leak generated between the outlet portions of the adjacent intake pipes. There was a problem that it was difficult to do. In the intake manifold 1, even if the outlet portions of the intake pipes are close to each other, the partition plate 61 suppresses intake air leakage between the intake manifolds 1. Therefore, a valve that controls the intake air amount in the adjacent intake pipes (32, 33). (38, 39) is provided, and the control for achieving the target intake air amount by the valve (38, 39) can be performed with high accuracy.
Control of the opening degree of the valves (38, 39) and the like is not particularly limited. For example, the valves (38, 39) are closed when the engine is less than a predetermined rotational speed (FIG. 12), and are opened when the engine is above the predetermined rotational speed. It can be controlled to be valved (FIG. 13). As a result, the amount of intake air required when the valve is opened can be introduced into the combustion chamber. The predetermined number of revolutions may be set as appropriate according to engine characteristics and required travel characteristics.

  The intake manifolds 31 and 34 of the intake manifold 1 shown in FIG. 1 are provided apart from the other intake pipes, and therefore are sealed by disposing an annular seal member 59 made of an elastic body. be able to. In the mating surface 42 of the mounting flange 41, grooves for fitting the seal members 59 can be formed on the outer peripheral portions of the outlet portions of the intake pipes 31 and 34, respectively. Therefore, as shown in FIG. 14, as a seal member used for the intake manifold 1, a seal member 51 used for sealing the intake pipes 32 and 33 and two seal members 59 used for sealing the intake pipes 31 and 34 are integrated. It is also possible to form.

  Note that the present invention is not limited to the embodiment described in detail above, and various modifications or changes can be made within the scope of the claims of the present invention.

1; intake manifold,
31-34; intake pipe, 36, 37; outlet, 38, 39; valve,
41; mounting flange, 42; mating surface, 43; partition wall, 46; groove, 47; partition groove,
51; seal member, 52; frame, 53; inner wall, 55; opening, 59; other seal member,
61; partition plate, 67; belt part,
81; Engine, 82, 83; Intake port.

Claims (9)

A seal member mounted in a groove provided in a mating surface between an intake manifold and an intake port for supplying intake air to a combustion chamber of an engine;
An annular frame made of an elastic body and having an opening;
A partition plate connected to the inner wall of the frame body and arranged to partition the opening of the frame body and formed thinner than a thickness in a direction parallel to the mating surface of the frame body. A seal member characterized by the above.   The sealing member according to claim 1, wherein an end surface of the partition plate on the intake port side has a predetermined length lower than an end surface of the frame on the intake port side.   The seal member according to claim 1, wherein the frame body has a belt portion formed so as to cover an end surface of the partition plate on the intake port side. 4. An at least two intake pipes close to each other at the outlet portion, and a mounting flange formed at the outlet portion and having a mating surface with the intake port, and the sealing member according to claim 1 on the mating surface. A mounted intake manifold,
The mounting flange is formed so as to surround the two intake pipes, and a groove portion to which the frame of the seal member is attached;
An intake manifold, comprising: a partition groove formed to partition between the outlet portions of the two intake pipes and into which the partition plate of the seal member is inserted.   5. The intake manifold according to claim 4, wherein an end surface of the partition plate on the intake port side has a predetermined length lower than an end surface of the frame on the intake port side.   The intake manifold according to claim 4 or 5, wherein the belt portion of the seal member is formed so as to cover an end surface of the partition plate on the intake port side.   The intake manifold according to any one of claims 4 to 6, wherein the two intake pipes supply intake air for introduction into different combustion chambers to the intake port.   The intake manifold according to claim 7, wherein the two intake pipes are provided with a valve for controlling the amount of intake air flowing into the two intake pipes.   The intake manifold according to claim 8, wherein the valve is closed when the engine is less than a predetermined number of revolutions and is opened at the predetermined number of revolutions or more.

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