JP6821488B2 - Seal member and intake manifold - Google Patents

Description

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

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 the flange is provided with a seal member for preventing leakage of intake air flowing in the intake pipe. 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-A-2002-70671

Most of the intake manifolds attached to the engine are made of synthetic resin, and a plurality of intake pipes for supplying 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 that serves as a mating surface with the intake port on the engine side. A seal member made of an elastic body is provided on the 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 the 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 distance between the adjacent intake ports becomes narrow. Correspondingly, the spacing between adjacent intake pipes of the intake manifold is also narrowed. Therefore, in the mounting flange, the outlet portions of the intake pipes are close to each other, and the pipe walls of the adjacent intake pipes may be composed of one partition wall.
However, when the outlets of the intake pipes are close to each other as described above, it becomes impossible to dispose a seal member having a certain thickness made of an elastic body on the mating surface with the intake port. For this reason, there is a possibility that intake air leaks between adjacent intake pipes on the mating surface with the intake port. Further, when a valve or the like is provided in the intake pipe and the intake amount is controlled by the valve or the like, there is a problem that it is difficult to control the target intake amount due to the ventilation generated between the 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 sealing member and an intake manifold that enhance the sealing performance of each intake pipe at outlets of a plurality of intake pipes adjacent to each other at narrow intervals. 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 for supplying intake air to the combustion chamber of an engine and an intake port. An annular frame body made of an elastic body and having an opening is connected to the inner wall of the frame body and arranged so as to partition the opening of the frame body, and is parallel to the mating surface of the frame body. A partition plate formed thinner than the thickness in the direction is provided , and the end surface of the partition plate on the intake port side is lowered by a predetermined length with respect to the end surface of the frame body on the intake port side. Is the gist.
The invention according to claim 2 is characterized in that, in the invention according to claim 1, the frame body has a band portion formed so as to cover an end surface of the partition plate on the intake port side. ..
According to a third aspect of the invention, at least two intake pipe proximate the outlet portion, and is formed in the outlet portion comprises a mounting flange having a mating surface of the intake port, the seal according to claim 1 or 2 An intake manifold in which a member is mounted on the mating surface, and the mounting flange has a groove portion formed so as to surround the two intake pipes and to which the frame of the seal member is mounted, and the two intake pipes. It is a gist to include a partition groove formed so as to partition between the outlet portions of the above and into which the partition plate of the seal member is inserted.
The invention according to claim 4 is the invention according to claim 3 , wherein the end face of the partition plate on the intake port side is lowered by a predetermined length with respect to the end face of the frame body on the intake port side. The gist is that.
The invention according to claim 5 is the invention according to claim 3 or 4 , wherein the frame body has a band portion formed so as to cover an end surface of the partition plate on the intake port side. And.
The invention according to claim 6 is the invention according to any one of claims 3 to 5, wherein the two intake pipes supply intake air for introduction into different combustion chambers to the intake port. And.
The invention of claim 7 is the invention of claim 6, wherein the two intake pipes, and summarized in that a valve for controlling the intake air quantity flowing is provided.
The invention according to claim 8 is the invention according to claim 7 , wherein the valve is closed at a speed lower than a predetermined speed and opened at a speed higher than the predetermined speed.

The seal member of the present invention is a seal member mounted in a groove provided on a mating surface between an intake manifold for supplying intake air to the combustion chamber of an engine and an intake port, and is made of an elastic body and has an opening. A partition plate that is connected to the inner wall of the frame and is arranged so as to partition the opening of the frame, and is formed thinner than the thickness in the direction parallel to the mating surface of the frame. And, at the outlets of the intake pipes that are arranged close to each other, the whole is sealed by a frame made of an elastic body and having a certain thickness, and between the outlets of the adjacent intake pipes. Communication can be suppressed by a partition plate. Even if the pipe wall between the adjacent intake pipes at the outlet is shared by one thin partition wall and the width for arranging a sealing material of a certain thickness between the partition wall and the engine cannot be secured. , The thin partition plate can suppress the ventilation between the outlets of each intake pipe.

When the end face of the partition plate on the intake port side is lowered by a predetermined length with respect to the end face of the frame body on the intake port side, the frame body is pressed and compressed at the mating surface with the engine. In this state, the end face of the partition plate comes into contact with the engine side, so that ventilation between the outlets of the adjacent intake pipes can be effectively suppressed. Further, since an excessive force is not applied to the partition plate until the frame body is compressed, it is possible to prevent abnormal deformation or breakage of the partition plate.
When the frame 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 hits the engine side with the band portion made of an elastic body interposed therebetween. Therefore, 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 close 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 to prevent abnormal deformation or breakage of the partition plate.

The intake manifold of the present invention includes at least two intake pipes that are 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, according to any one of claims 1 to 3. An intake manifold in which a seal member is mounted on the mating surface, and the mounting flange has a groove portion formed so as to surround the two intake pipes and to which the frame of the seal member is attached, and the two intake air intakes. Since it is provided with a partition groove formed so as to partition between the outlet portions of the pipe and into which the partition plate of the seal member is inserted, the seal member is optimally mounted on the mating surface of the mounting flange with the intake port side. can do. As a result, the entire outlet portion of the adjacent intake pipe can be sealed by a frame body made of an elastic body attached to the groove portion. Further, the communication between the outlets of the intake pipe can be suppressed by the partition plate inserted in the partition groove. A partition with a thin thickness is formed between the outlets of each intake pipe, and even if the width for disposing a sealing material having a certain thickness cannot be secured between the partition wall and the engine, the partition is thin. The plate can suppress ventilation between the outlets of each intake pipe.

When the end face of the partition plate on the intake port side is lowered by a predetermined length with respect to the end face of the frame body on the intake port side, the intake manifold is attached to the engine and tightened to seal the member. Since the end face of the partition plate comes into contact with the engine side in the compressed state of the frame body, it is possible to effectively suppress the ventilation between the outlet portions of the adjacent intake pipes. Further, since an excessive force is not applied to the partition plate until the frame body is compressed, it is possible to prevent abnormal deformation or 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 interposed therebetween. Therefore, 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 close 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 to prevent abnormal deformation or breakage of the partition plate.

When the two intake pipes supply the intake air for introduction into different combustion chambers to the intake port, the partition plate of the seal member causes the leakage of the intake air to be supplied from each intake pipe to each combustion chamber. It can be suppressed.
When the two intake pipes are provided with a valve for controlling the inflowing intake amount, the controllability of the intake amount by the valve can be improved. That is, since the seal member suppresses the ventilation of each intake pipe to the outside and the ventilation between each intake pipe, it is possible to accurately control the intake amount to be the target by the valve.
When the engine is closed at a speed lower than the predetermined speed and the valve is opened at a speed higher than the predetermined speed, the sealing member suppresses ventilation of each intake pipe to the outside and ventilation between the intake pipes. Therefore, the target intake amount can be introduced into the combustion chamber when the valve is opened.

The present invention will be further described in the following detailed description with reference to the plurality of references mentioned with reference to non-limiting examples of typical embodiments according to the invention, but similar reference numerals are in the drawings. Similar parts are shown through several figures.
It is a perspective view for demonstrating the intake manifold which arranged the seal member. It is a perspective view which shows the appearance of the seal member which concerns on Example. FIG. 2 is a cross-sectional view taken along the line AA of the seal member of FIG. It is a front view which shows the mounting flange which attached the seal member. It is sectional drawing of AA in FIG. FIG. 4 is a sectional view taken along line BB in FIG. FIG. 5 is a sectional view taken along the line AA in a state where the mounting flange shown in FIG. 4 is mounted on the engine. It is sectional drawing of BB in the state where the mounting flange shown in FIG. 4 is mounted on the engine. It is a perspective view which shows the appearance of the seal member which has a band part. It is a partial cross-sectional view which shows the state which the seal member which has a band part is attached to the mounting flange. It is a partial cross-sectional view which shows the state which attached the mounting flange shown in FIG. 10 to the engine which formed the intake port. It is a schematic partial sectional view which shows the valve (closed state) provided in the intake pipe. It is a schematic partial cross-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 another intake pipe.

The matters shown here are for exemplifying and exemplifying embodiments of the present invention, and are considered to be the most effective and effortless explanations for understanding the principles and conceptual features of the present invention. It is stated for the purpose of providing what seems to be. In this regard, it is not intended to show structural details of the invention beyond a certain degree necessary for a fundamental understanding of the invention, and some embodiments of the invention are provided by description in conjunction with the drawings. It is intended to clarify to those skilled in the art how it is actually realized.

FIG. 1 shows an example of an intake manifold for supplying intake air to the combustion chamber of an engine. The intake manifold 1 is made of a synthetic resin such as a 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. Therefore, 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 mounted on an engine in which an intake port is formed by a mating surface 42 thereof. Each intake pipe and each intake port are connected with a seal member interposed therebetween. An annular seal member 59 made of an elastic body is attached to each of the outlets of the intake pipes 31 and 34, which are arranged apart from the other intake pipes.

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

(Seal member)
Hereinafter, the seal member (51) for suppressing communication between the outlet portions (36, 37) of two adjacent intake pipes (32, 33) will be described by taking the intake manifold (1) as an example. The reference numerals in parentheses of each configuration described in the following embodiments indicate the correspondence with the specific configurations given in the examples.
The seal member (51) according to the present embodiment is used by being mounted on a groove provided in 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 seal member. The intake manifold (1) is attached to the engine (81) in which the intake ports (82, 83) are formed so as to sandwich the seal member (51) (see FIG. 8).
The seal member (51) is connected to an annular frame body (52) made of an elastic body and having an opening (55), and an inner wall (53) of the frame body (52), and an opening portion of the frame body (52). It is provided with a partition plate (61) which is arranged so as to partition (55) and is formed thinner than the thickness (T) in the direction parallel to the mating surface (42) of the frame body (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 body (52) is not limited as long as it is an elastic body, and for example, an elastomer such as rubber, a synthetic resin, or the like can be adopted. The size and shape of the frame body (52) are not particularly limited, and can be set according to the size, shape, arrangement, etc. of the adjacent outlet portions (36, 37) of the intake pipe and the mounting flange (41). Let T be the width of the frame body (52) in the direction parallel to the mating surface (42) (see FIG. 3A).

Since the partition plate (61) does not need to be compressed and deformed at the time of use unlike the frame body (52), it can be made of a hard material having an elastic modulus smaller than that of the frame body (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, even if it is thinner than the frame body (52), it does not bend or twist, and there is no gap between the outlets (36, 37) of the adjacent intake pipes. can do.
The specific configuration of the partition plate (61) may be appropriately determined. For example, the strip-shaped partition plate main body (62) and the inner wall of the frame body (52) are provided at both ends of the partition plate main body (62). It comprises ends (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 main 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 body (52) is not particularly limited.

The partition plate 61 can be provided in various ways. For example, it is preferable that the end surface (61b) of the partition plate (61) on the intake port side is formed to be a predetermined length d lower than the end surface (52b) of the frame body (52) on the intake port side (FIG. 3). See (a)). In this way, the end surface (61b) of the partition plate comes into contact with the engine side in a state where the frame body (52) is pressed and compressed with the engine (81), so that the outlet portion of the adjacent intake pipe ( The ventilation between 36 and 37) can be suppressed. Further, since an excessive force is not applied to the partition plate (61) until the frame body (52) is compressed, it is possible to prevent the partition plate (61) from being abnormally deformed or damaged. The length d may be set according to the dimensions, elasticity, and the like of the frame body 52.
The engine (81) side on which the intake port (82, 83, etc.) is formed is referred to as the "intake port side" or the "engine side" when viewed from the seal member (51). That is, the "intake port side" (engine side) is on the side opposite to the mounting surface of the seal member (51) on the mounting flange (41).

Further, the frame body (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. 3 (b), FIG. (See FIG. 9). In this way, the end face (61b) of the partition plate hits the engine side with the band portion (67) made of an elastic body sandwiched between them, so that a gap between the end face (61b) of the partition plate and the engine It can be suppressed, and more effectively, the ventilation between the outlet portions (36, 37) of the adjacent intake pipes can be suppressed. In addition, the band portion (67) can prevent an excessive force from being applied to the partition plate, and can prevent abnormal deformation or 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) and an outlet portion (36, 37) that are close to each other at the outlet portion (36, 37) and has an intake port (82, 83). ) Is provided with a mounting flange (41) having a mating surface (42), and the sealing member (51) is mounted on the mating surface (42).
Therefore, the mounting flange (41) has a groove portion formed so as to surround the outlet portions (36, 37) of the two intake pipes (32, 33) and to which the frame body (52) of the seal member (51) is mounted. A partition groove (47) formed so as to partition between the (46) and 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. , (See FIGS. 4 to 6).

The mounting flange (41) is integrally formed with the intake manifold (1) and is connected to the intake ports (82, 83) of the engine (81) at the outlets (36, 33) of the two intake pipes (32, 33). 37) is formed. Then, 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 body (52) of the seal member (51) is mounted. 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 outlets (36, 37) are close to each other, and the partition wall (43) is thin. Therefore, the width of the end surface (44) of the partition wall (43) on the engine (81) side 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. It is difficult to form a groove with the width required for this. Therefore, 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 plate (61) of the seal member (51) is inserted into the partition groove (47). ) 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 body (52) of the seal member (51) attached to the groove portion (46) of the mounting flange (41) is compressed by pressing, and the frame body (52) is compressed. 52) is in close contact with the engine (81) side. Thereby, the entire outlet portions (36, 37) of the adjacent intake pipes can be sealed by the frame body (52) made of an elastic body attached to the groove portion (47).
Further, as the frame body (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. As a result, communication between the outlets (36 and 37) of the two intake pipes can be suppressed by the partition plate (61). Even if the width of the end face (44) of the partition wall (43) on the engine (81) side is narrow and a groove for attaching the sealing material made of an elastic body cannot be formed, the partition plate (61) that is hard and thin is used. , Ventilation between the outlets (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 the appearance of the seal member 51 viewed from the intake port side (engine 81 side). The seal member 51 is arranged so as to be connected to the inner wall 53 of the frame 52 and the annular frame 52 having an opening 55 made of an elastic body and to partition the opening 55 of the frame 52, and to be connected to the mating surface 42. A partition plate 61 formed thinner than the thickness T of the frame body 52 in the parallel direction is provided. 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 (see FIG. 1).
The seal member 51 is used so that one end surface 51b side thereof comes into contact with the engine 81. The other end surface 51a side of the seal member 51 is mounted in a groove (groove portion 46 and partition groove 47) formed in the mounting flange 41 of the intake manifold 1. Both end faces (51a, 51b) of the seal member 51 are in a direction parallel to the mating surface 42 of the mounting flange 41. The thickness of the frame body 52 in the above direction is T. Further, the strip-shaped partition plate 61 is provided in a direction perpendicular to the mating surface 42.

The partition plate 61 can be formed by using a metal, a hard synthetic resin, or the like. The partition plate 61 of this example is composed of 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 ends (63, 64) of the partition plate 61 can be integrally formed with the partition plate main body 62 so as to have a bent shape from the partition plate main 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, the frame body 52 may be provided with a groove or the like for fitting the end portions (63, 64) of the partition plate 61, and the end portions (63, 64) may be fitted.

The partition plate 61 can be provided in various ways. For example, FIG. 3A shows a cross section taken along the line AA of FIG. The thickness of the partition plate 61 is formed to be thinner than the thickness T of the frame body 52. When the intake manifold 1 is attached to the engine 81, the end surface 61a side of the partition plate 61 is inserted into the partition groove 47 formed in the attachment flange 41, and the end surface 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 lowered by a length d with respect to the end surface 52b of the frame body 52 on the intake port side. ing. In this way, the end surface 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.

Further, as shown in FIG. 3B, the frame body 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. In this way, the end surface 61b of the partition plate 61 hits the engine side with the band portion 67 made of an elastic body sandwiched therein, so that the gap between the end surface 61b of the partition plate 61 and the engine 81 can be suppressed. it can.
The band portion 67 can have a predetermined width centered on a position in contact with the end surface 61b of the partition plate 61. For example, the width of the band portion 67 can be less than the width (thickness) of the end surface 44 of the partition wall 43 (see FIG. 10). Further, the thickness of the band portion 67 can be appropriately set.

(Intake manifold)
FIG. 4 is a front view showing the mounting flange 41 (matching surface 42 side) of the intake manifold 1 on which the seal member 51 is mounted. 5 is a cross-sectional view taken along the line AA in FIG. 4, and FIG. 6 is a cross-sectional view taken along the line BB. 5 and 6 show a state in which the seal member 51 is only mounted on 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 of two intake pipes (32, 33) adjacent to each other at the outlet portion (36, 37) and an intake port (82, 83) formed at the outlet portion (36, 37). It is provided with a mounting flange 41, and the sealing 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 mounted. And a partition groove 47, which is 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 61b of the partition plate 61 is lower than the end surface 52b of the frame body 52 by a predetermined length d. Has been done. The length d is the length obtained by subtracting the length required for pressing the end surface 61b of the partition plate 61 against the engine 81 from the length at which the frame body 52 is compressed by tightening the intake manifold 1 to the engine 81. Is.

FIG. 7 is a cross-sectional view taken along the line AA in a state where the mounting flange 41 shown in FIG. 4 is mounted on the engine 81 provided with the intake ports (82, 83), and FIG. 8 is a cross-sectional view taken along the line BB.
When the mounting flange 41 is attached to the engine 81 with the sealing member 51 sandwiched between them, the frame 52 of the sealing member 51 made of an elastic body is compressed in the direction of being accommodated in the groove 46 provided in the mounting 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 52b of the frame body 52 comes into 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. Is done. Since the partition plate 61 made of metal or the like is not deformed, the end surface 61b of the partition plate 61 is pressed against the partition wall on the engine 81 side that separates the intake ports 82 and 83. As a result, 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. With this configuration, after the end surface 61b of the partition plate 61 is brought into contact with the engine 81 side, the partition plate 61 is pushed into the gap on the bottom side of the partition plate 47 so that the end surface 61b of the partition plate 61 is the engine. It is pressure-welded 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 61a 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 of a certain length, ventilation through the partition groove 47 can be suppressed. it can.

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

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 fits into the groove portion 46 provided in the mounting flange 41, is compressed so as to be accommodated in the groove portion 46, and the end surface 52b 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. Then, the partition plate 61 is pushed by the engine 81 across the band portion 67, 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 synthetic resin, it is possible to form a narrow partition groove 47 on the end surface 44 of the narrow partition wall 43. For example, if the width of the end face 44 of the partition wall 43 is about 3 to 5 mm, a partition groove 47 having a width into which a partition plate 61 having a thickness of about 1 mm can be inserted can be formed. The height direction of the partition plate 61 (perpendicular to the mating surface 42) can be, for example, 3 to 4 mm.

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

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

The present invention is not limited to the embodiments detailed above, and various modifications or modifications 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; divider, 67; band,
81; engine, 82, 83; intake port.

Claims (8)

A seal member mounted in a groove provided on the mating surface of the intake manifold and the intake port for supplying intake air to the combustion chamber of the engine.
An annular frame made of an elastic body and having an opening,
A partition plate which is connected to the inner wall of the frame body and is arranged so as to partition the opening of the frame body and is formed thinner than the thickness in the direction parallel to the mating surface of the frame body is provided.
A seal member characterized in that the end surface of the partition plate on the intake port side is lowered by a predetermined length with respect to the end surface of the frame body on the intake port side . The seal member according to claim 1, wherein the frame body has a band portion formed so as to cover an end surface of the partition plate on the intake port side. An intake having at least two intake pipes close to each other at the outlet and a mounting flange formed at the outlet and having a mating surface with the intake port, and the sealing member according to claim 1 or 2 mounted on the mating surface. It ’s a manifold,
The mounting flange has a groove portion formed so as to surround the two intake pipes and to which the frame body of the sealing member is mounted.
An intake manifold provided with a partition groove formed so as to partition between the outlet portions of the two intake pipes and into which the partition plate of the seal member is inserted. The intake manifold according to claim 3 , wherein the end surface of the partition plate on the intake port side is lowered by a predetermined length with respect to the end surface of the frame body on the intake port side. The intake manifold according to claim 3 or 4 , wherein the frame body has a band portion 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 3 to 5 , wherein the two intake pipes supply intake air to the intake port for introduction into different combustion chambers. The intake manifold according to claim 6 , wherein the two intake pipes are provided with a valve for controlling the amount of intake air flowing in. The intake manifold according to claim 7 , wherein the valve is closed at a speed lower than a predetermined speed and opened at a speed higher than the predetermined speed.

Images