JP4089264B2 - Gas insulator integrated heat insulator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a gasket-integrated heat insulator in which a metal exhaust manifold gasket interposed between an engine and an exhaust manifold and a heat insulator including an aluminum plate are integrated as an example.
[0002]
[Prior art]
Conventionally, various heat insulators have been used for the heat source and sound source in order to prevent the heat, noise, vibration, etc., from the heat source and sound source such as an internal combustion engine, etc. . These heat insulators may be used for a single purpose for preventing any one of heat, noise, vibration and the like, but may also be used for a plurality of purposes.
[0003]
As an example, an exhaust manifold (hereinafter referred to as “exhaust manifold”) of an automobile engine causes high-temperature combustion exhaust gas that reaches several hundred degrees as the engine operates to flow at a pulsating pressure of several thousand cycles per minute. In addition, heat insulators are used so that heat and noise are not dissipated in the engine room or outside the vehicle.
[0004]
Such a heat insulator for an exhaust manifold of an automobile may be formed by press-molding a heat insulator material made of a single iron plate into a three-dimensional shape along the external shape of the exhaust manifold. In order to increase the shielding effect against heat, a heat insulator material in which a heat insulating sound absorbing material is sandwiched between a plurality of metal plates is often used, and such a heat insulator material has a three-dimensional shape along the external shape of the exhaust manifold. It is formed by press molding.
[0005]
[Problems to be solved by the invention]
Such a heat insulator is manufactured by pressing an iron plate as described above, is relatively heavy, and needs to be fixed to the exhaust manifold by bolting or the like at a plurality of locations. For this reason, there exists a malfunction that a manufacturing man-hour increases and it becomes a cost increase. In addition, high-temperature heat as described above is transmitted to this heat insulator, and high-frequency vibration is transmitted, so the heat insulator is press-molded into a three-dimensional shape. Cracks may occur around the bolt hole through which the bolt is inserted.
[0006]
In addition, such heat insulators are assembled by attaching the exhaust manifold to the engine with the exhaust manifold sandwiched in place, and then bolting it at the multiple locations described above. This also increases the number of manufacturing steps and increases costs. The problem that becomes.
[0007]
The present invention has been made to solve the above-mentioned problems, and an object thereof is to provide a gasket-integrated heat insulator that can significantly reduce the number of manufacturing steps and can effectively prevent the occurrence of cracks. That is.
[0008]
[Means for Solving the Problems]
According to the first aspect of the present invention, there is provided a gasket interposed between an exhaust port hole of an engine and an exhaust manifold, a heat insulator body comprising an aluminum plate provided so as to surround the exhaust manifold, and the gasket and the heat insulator. A gasket-integrated heat insulator including a connecting member made of a flexible material that connects the main body to each other.
[0009]
According to a second aspect of the present invention, in the first aspect of the invention, the heat insulator main body has a valley portion and a raised portion extending in a first direction, respectively, along a second direction intersecting the first direction. A plurality of corrugated shapes alternately formed are formed, and each raised portion is configured to include an aluminum plate whose height and width are periodically changed along the first direction to form a three-dimensional shape, This is a case where the first direction is determined in a direction intersecting with a main ridge line corresponding part constituting the three-dimensional shape.
[0010]
A third aspect of the present invention is the case of the first aspect, wherein the heat insulator body has a mounting portion that is attached to the exhaust manifold in the vicinity of the side opposite to the coupling position with the connecting member.
[0011]
A fourth aspect of the present invention is the case of the first aspect, wherein the connecting member is coupled to the gasket and the heat insulator main body using coupling pieces.
[0012]
The invention according to claim 5 is the invention according to claim 1, wherein the gasket is made of a material having elasticity, the connecting member is a connecting piece formed integrally with the gasket, and one end of the connecting piece is a heat insulator. In this case, the gasket and the heat insulator are connected to each other.
[0013]
[Action]
According to the invention described in claim 1, since the heat insulator constituting the gasket-integrated heat insulator of the present invention is composed of an aluminum plate, the heat insulator body included in the present invention uses an iron plate or the like. As compared with the above, the weight can be remarkably reduced, and it is possible to reduce the number of attachment points as reinforcement parts when attaching to the exhaust manifold. Therefore, in the manufacturing process in which the exhaust manifold is assembled to the engine and the heat insulator body is assembled to the exhaust manifold, the number of manufacturing steps can be reduced and the cost can be reduced.
[0014]
In addition, since the heat insulator body is reduced in weight, even when high-temperature heat is transmitted from an exhaust manifold or the like and high-frequency vibration is transmitted and the heat insulator body itself vibrates, the heat insulator body vibrates. The stress applied to the place where the insulator body is attached to the exhaust manifold can be reduced, and the occurrence of cracks in the heat insulator body can be prevented.
[0015]
In the present invention, the exhaust manifold gasket and the heat insulator main body attached to the exhaust manifold are integrated using a connecting member. Therefore, the gasket included in the present invention is connected to the exhaust port hole of the engine and the exhaust manifold. The heat insulator body is partially fixed in the process of sandwiching and fixing between them. Thereby, the manufacturing process required for mounting the heat insulator body to the exhaust manifold can be simplified, and this can also reduce the cost.
[0016]
According to invention of Claim 2, the said trough part and a protruding part implement | achieve the function of the rib with respect to a ridgeline equivalent site | part, and generation | occurrence | production of the excessive vibration of a heat insulator main body can be prevented. Therefore, in addition to the operation related to the first aspect, this also prevents the occurrence of cracks in the heat insulator body.
[0017]
According to the invention of claim 3, since the heat insulator body has an attachment portion that is attached to the exhaust manifold in the vicinity of the side opposite to the connection position with the connection member, the attachment portion in the heat insulator body is provided. It is possible to reduce the configuration provided in the configuration, and the configuration can be simplified in the present invention.
[0018]
Further, in the present invention, in the process of mounting the heat insulator body to the exhaust manifold after the exhaust manifold is assembled to the engine, one end of the heat insulator body is connected to the gasket, so that the number of mounting steps can be reduced. it can. This can also reduce the number of manufacturing steps.
[0019]
According to invention of Claim 4, the connection member is respectively couple | bonded with the gasket and the heat insulator main body using the coupling piece. Even in such a case, since the gasket and the heat insulator main body are connected to each other by the connecting member having elasticity, the same operation as that described with respect to the first aspect is realized in the present invention.
[0020]
According to the invention of claim 5, the gasket is made of an elastic material, the connecting member is a connecting piece formed integrally with the gasket, and one end of the connecting piece is engaged with the heat insulator, and the gasket is formed. And the heat insulator are connected to each other.
[0021]
Therefore, when the gasket and the heat insulator main body are connected to each other, the need for using special parts for connection is eliminated, the number of parts of the product can be reduced, and the configuration is simplified.
[0022]
In addition, since the gasket and the heat insulator main body are connected to each other, the connecting piece is engaged with the gasket, so the necessity of the connecting work step assumed when using the special connecting separate part is eliminated. , Structural man-hours can be reduced.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described below with reference to examples. 1 to 9 show a first embodiment of the present invention. FIG. 1 is a perspective view showing a state in which an insulator 1 which is a gasket-integrated heat insulator main body according to a first embodiment of the present invention is mounted on an exhaust manifold (hereinafter referred to as an exhaust manifold) 3, and FIG. 3 is a developed view of the insulator 1, FIG. 4 is a sectional view taken along section line X 4 -X 4 of FIG. 3, and FIG. 5 is an enlarged view of the insulator body 51 of the insulator 1. 6 is a cross-sectional view taken along section line X6-X6 in FIG. 5, FIG. 7 is a cross-sectional view seen from section line X7-X7 in FIG. 5, and FIG. FIG. 9 is a simplified cross-sectional view of the insulator body 51. FIG.
[0024]
Hereinafter, the outline of the insulator 1 of the present embodiment will be described with reference to FIG. As an example, the engine 2 of an automobile is configured by joining a cylinder head 40 and a cylinder block 41 with a cylinder head gasket 42 therebetween. An exhaust port hole 44 through which combustion exhaust gas from the combustion chamber 43 is discharged is formed in the cylinder head 40. The exhaust manifold 3 is joined to the exhaust port hole 44 with an exhaust manifold 45 interposed therebetween.
[0025]
Hereinafter, the gasket-integrated insulator 1 of this embodiment will be described with reference to FIGS. 1, 3 and 4 together. The insulator 1 according to the present embodiment includes the exhaust manifold gasket 45. The exhaust manifold 45 has an exhaust hole 47 and a bolt hole 48 formed in a metal plate 46 such as a stainless steel plate as an example, and further surrounds the exhaust hole 47 in order to seal the exhaust flowing through the exhaust hole 47. A bead 49 is formed.
[0026]
Such an exhaust manifold gasket 45 is connected to each other by an insulator body 51 and various joining means such as bolts and spot welding by a connecting member 50 made of a flexible metal material such as expanded metal or metal mesh material. Yes. In the present embodiment, a case where the rivets 52 are connected to each other will be described. However, the present invention is not limited to this example, and a bolt or the like may be used. Further, the insulator body 51 is fixed to the exhaust manifold 45 via the connecting member 50 as described above at one end on the exhaust manifold 45 side. On the other hand, one bolt hole 53 is formed as an example in the vicinity of the opposite side of the insulator main body 51 from the exhaust manifold 45 and is fixed to the exhaust manifold 3 with a bolt 54. That is, the insulator body 53 is attached to the engine 2 and the exhaust manifold 3 by the connecting member 50 and the bolt 54.
[0027]
Such an insulator body 51 is manufactured by press-molding an aluminum plate formed of various aluminum alloys into a three-dimensional shape along the external shape of the exhaust manifold 3 as an example having a structure to be described later.
[0028]
Exhaust gas pulsating at a frequency of several thousand cycles per minute at a high temperature of 600 to 700 ° C., for example, passes from the combustion chamber of the engine 2 to the exhaust manifold 3, so that the exhaust manifold 3 itself becomes a high temperature and emits high-temperature heat radiation. It tends to be a heat source that is generated, and it tends to be a sound source and a vibration source that dissipates noise caused by fuel combustion noise in the engine 2 to the outside.
[0029]
In the present embodiment, in order to suppress such high-temperature heat radiation and noise from the exhaust manifold 3 as much as possible, an insulator body 51 having a configuration described later is installed in a manner covering the exhaust manifold 3. As shown in FIG. 6, the insulator body 51 of this embodiment includes a pair of metal plates (for example, NIMBUS manufactured by T & N) 4 and 5, and a metal plate 4 made of an aluminum alloy having a specific gravity of about 2.7. 5 is formed by laminating a heat-resistant sound-absorbing material (hereinafter referred to as a sound-absorbing material) 6 made of inorganic fibers and the like, and is formed into a three-dimensional shape along the external shape of the exhaust manifold 3. And a top portion T2 connecting the entire circumference of the end portion of T1. The side wall T1 and the top part T2 are connected at an obtuse angle θ. In this embodiment, the metal plates 4 and 5 will be described as including aluminum foil or aluminum alloy foil, and a thin plate made of aluminum or an alloy thereof.
[0030]
As shown in FIGS. 5 to 8, the metal plates 4 and 5 used in the insulator body 51 of the present embodiment have a plurality of corrugated shapes 9 in which raised portions 7 and valley portions 8 are alternately repeated. It has a shape that extends along one direction A1 and continues along a second direction A2 that is a direction that intersects the first direction A1 at an acute angle, preferably a direction that is orthogonal to the first direction A1. As shown in FIGS. 5 to 8, the raised portions 7 are alternately arranged with the first raised portions 10 and the second raised portions 11 rising from the valley portions 8 as shown in FIGS. 5 to 8. . Moreover, the said trough part 8 has the flat part 12 and the recessed part 13 arranged alternately as FIG.
[0031]
The first upright portion 10 includes a pair of side walls 14 and 15 that rise from the valley portion 10 in a substantially trapezoidal shape, and a relatively flat top portion 18 that is formed by connecting the tips of the side walls 14 and 15 to each other. It consists of The first upright portion 10 is curved inwardly, and the distal end portion is wider than the proximal end portion of the first upright portion 10.
[0032]
On the other hand, the second upright portion 11 is formed by crushing the first upright portion 10 to a predetermined extent in the width direction, and a pair of side walls 19, 20 rising from the flat portion 12, and the side walls 19, 20. The distal ends are connected to each other, and a concave portion 23 is formed on the lower side of FIG. Each of the second upright portions 11 and the concave portions 13 is intermittently connected along a second direction A2 that is a direction substantially orthogonal to the first direction A1 that is a direction in which the plurality of waveform shapes 9 extend. Formed as follows.
[0033]
Therefore, as shown in FIGS. 6 and 7, the protruding portion of the raised portion 7 of the metal plate 5 is fitted into the inner peripheral portion of the raised portion 7 of the metal plate 4 that is bent. Further, also in the second upright portion 11, the side walls 19, 20 are formed in an inwardly curved shape with the tip portion wider than the base end portion. Even in such a second upright portion 11, the protruding portion of the second upright portion 11 of the metal plate 5 is fitted into the inner peripheral portion of the second upright portion 11 of the metal plate 4 that is bent inward. Thereby, the metal plates 4 and 5 can be firmly fixed to each other without using any special fixture or fastener. This mutual fixation is similarly performed even when the sound absorbing material 6 made of inorganic fiber or the like is interposed between the metal plates 4 and 5. This is because the mutual coupling of the metal plates 4 and 5 is due to the mechanical meshing relationship between them.
[0034]
A flange 28 having the corrugated shape fully bent is formed on the outer peripheral portion of the side wall T1 of the insulator body 51 formed in a three-dimensional shape. The flange 28 is folded back to the inner side of the insulator body 51, and a folded portion 29 is formed. It is formed. When the folded portion 29 is not formed, the outer peripheral portion of the insulator body 51 is in a state where the sharp cut ends of the blanked metal plates 4 and 5 are directly exposed to the outside. Accordingly, the turn-back portion 29 is an assembly worker who works with the insulator body 51 in the assembly process of the insulator body 51 to the exhaust manifold 3 of the vehicle engine 2 in the vehicle manufacturing process, or the vehicle after the manufacture. An operator or a general user who may have the insulator main body 51 at the time of maintenance is prevented from injuring a finger.
[0035]
Hereinafter, with reference to FIG. 1, one of the features of the insulator body 51 of the present embodiment will be described. Since the insulator main body 51 of the present embodiment is formed in a three-dimensional shape that conforms to the three-dimensional appearance of the exhaust manifold 3 as described above, the insulator main body 51 is bent on the metal plates 4 and 5 as shown in FIG. One or a plurality of ridge line equivalent parts 30 which are parts are formed. In the present embodiment, the metal plates 4, 5 are arranged such that the first direction A <b> 1 that is the longitudinal direction of the corrugated shape 9 is a direction intersecting the main ridge line equivalent part 30 among the plurality of ridge line equivalent parts 30. Is pressed into a three-dimensional shape.
[0036]
Here, the main ridge line equivalent portion 30 is a portion where a relatively large curvature characterizing the overall shape of the insulator body 51 continues. That is, among the various large and small bent portions formed in the insulator main body 51, the bent portion extending over a relatively long length that substantially determines the external shape of the insulator main body 51 is indicated. When the insulator main body 51 is attached to the exhaust manifold 3, the insulator main body 51 also vibrates due to transmission of vibration from the exhaust manifold 3. When the insulator main body 51 vibrates due to this vibration, there is a possibility that the portions of the insulator main body 51 on both sides of the main ridge line corresponding portion 30 will vibrate. When such vibration is generated, a portion near the ridge line corresponding portion 30 of the insulator main body 51 is likely to be cracked due to metal fatigue due to repeated bending.
[0037]
On the other hand, in the present embodiment, a direction in which the first direction A1 of the plurality of waveform shapes 9 formed in the insulator body 51 intersects the main ridge line equivalent portion 30, preferably a direction orthogonal to Therefore, the corrugated shape 9 realizes the action of the rib against the vibration centered on the ridge line equivalent portion 30. Thereby, the vibration of the insulator body 51 can be suppressed, the occurrence of cracks in the insulator body 51 can be prevented, and the quality of the insulator body 51 can be significantly improved.
[0038]
Moreover, with respect to the vibration generated along the direction in which the ridge line corresponding portion 30 extends, it is shown in FIGS. 6 to 8 that extend intermittently along the second direction A2 and continue along the first direction A1. The second upright portion 11 also functions as a rib to suppress vibration.
[0039]
As described above, according to the present embodiment, the insulator main body 51 includes an aluminum alloy. Therefore, the insulator main body 51 is significantly reduced in weight as compared with the case where an iron plate or the like is used, and the attachment location can be reduced when the insulator body 51 is attached to the exhaust manifold 3.
[0040]
In addition, since the number of mounting locations can be reduced, the number of manufacturing steps can be reduced and the cost can be reduced in the manufacturing process in which the exhaust manifold 3 is assembled to the engine 2 and the insulator body 51 is further assembled to the exhaust manifold 3.
[0041]
Further, since the insulator body 51 is reduced in weight, even when high-temperature heat is transmitted from the exhaust manifold 3 or the like and high-frequency vibration is transmitted and the insulator body 51 itself vibrates, the insulator body 51 itself vibrates due to the vibration of the insulator body 51. The stress applied to the place where the main body 51 is attached to the exhaust manifold 3 can be reduced, and the occurrence of cracks in the insulator main body 51 can be prevented.
[0042]
Further, in the present embodiment, the exhaust manifold gasket 45 and the insulator body 51 are integrated, so that the exhaust manifold gasket 45 included in the present embodiment is sandwiched and fixed between the exhaust port hole 44 of the engine 2 and the exhaust manifold 3. In the process, the insulator body 51 is partially fixed. Thereby, the manufacturing process required for the attachment of the insulator main body 51 to the exhaust manifold 3 can be simplified, and this can also reduce the cost.
[0043]
The insulator main body 51 is defined in a direction in which a first direction A1 in which the valley portion 8 and the raised portion 7 extend intersects with a main ridge line equivalent portion 30 constituting the three-dimensional shape of the insulator main body 51. Thereby, the trough part 8 and the raised part 7 implement | achieve the function of the rib with respect to the said ridgeline equivalent site | part 30, and generation | occurrence | production of the excessive vibration of the insulator main body 51 can be prevented. Accordingly, this also prevents the occurrence of cracks in the insulator main body 51.
[0044]
The insulator main body 51 has a configuration including a bolt hole 53 that is attached to the exhaust manifold 3 in the vicinity of the connection position with the connection member 50, so that the insulator main body 51 is provided around the bolt hole 53 in the insulator main body 51. Configuration can be reduced, and simplification of the configuration can be realized.
[0045]
Further, according to the present embodiment, the three-dimensional shape 9 of the insulator main body 51 includes the side wall T1 and the top portion T2, and the side wall T1 is connected to the top portion T2 at an obtuse angle θ. Therefore, since the insulator body 51 does not have an undercut shape with respect to the pressing direction, the insulator body 51 can be manufactured by pressing when manufacturing the three-dimensional insulator body 51. Thereby, a manufacturing process is simplified.
[0046]
According to the present embodiment, since the flange 28 is formed on at least a part of the outer peripheral portion of the insulator body 51, the flange 28 realizes a rib function when the insulator body 51 vibrates, and the insulator body 51 The amplitude of the vibration can be reduced, and the occurrence of cracks in the heat insulator can be suppressed.
[0047]
Further, according to the present embodiment, the folded back portion 29 is formed by folding back the end portions of the metal plates 4, 5 on at least a part of the outer peripheral portion of the insulator body 51, so that the insulator body 51 is attached to the exhaust manifold 3. During the assembly process or the maintenance of the insulator body 51 after manufacture, the situation where the operator is wounded by the sharp cut end that can occur on the outer periphery of the heat insulator that is just blanked is prevented. . In this respect, the quality of the insulator body 51 is significantly improved.
[0048]
10 is a perspective view of an insulator 1a which is a gasket-integrated heat insulator according to a second embodiment of the present invention, FIG. 11 is a plan view of the insulator 1a, and FIG. 12 is a cross-sectional line X12-X12 in FIG. FIG.
[0049]
The present embodiment is similar to the first embodiment, and corresponding portions are denoted by the same reference numerals. The feature of the present embodiment is that the insulator main body 51 that is a heat insulator and the exhaust manifold gasket 45 that is a gasket are connected to the insulator main body 51 and the exhaust manifold gasket 45 of the first embodiment with rivets 52. Instead of the connecting member 50, two connecting pieces 55 which are connecting members integral with the exhaust manifold 45 are used. The number of the connecting pieces 55 can be appropriately determined according to the size of the insulator main body 51 and the exhaust manifold gasket 45, and the number of the present embodiment is merely an example. Further, since the connecting piece 55 is formed of the metal plate 46, the connecting piece 55 has flexibility and a characteristic as an elastic body that can be easily elastically deformed.
[0050]
Each connecting piece 55 is integrally stamped and formed when the metal plate 46 constituting the exhaust manifold casket 45 is formed. The connecting piece 55 is formed slightly longer than the distance from the exhaust manifold 45 to the insulator main body 51. Further, a plurality of insertion openings 56 into which the connecting pieces 55 can be inserted are formed in the vicinity of the end of the insulator body 51 on the exhaust manifold 45 side.
[0051]
When connecting the exhaust manifold 45 and the insulator body 51, the connection piece 55 of the exhaust manifold 45 is inserted into the insertion port 56 of the insulator body 51, and the portion protruding from the insertion port 56 of the connection piece 55 is folded. return. Thereby, the insulator main body 51 and the exhaust manifold gasket 45 are mutually connected by the connecting piece 55 which can be elastically deformed.
[0052]
Thus, according to the present embodiment, the insulator main body 51 and the exhaust manifold gasket 45 are connected to each other by the elastically deformable connecting piece 55, thereby forming the integrally configured insulator 1a. Therefore, also in this embodiment, it is possible to realize the same function and effect as those described in the first embodiment.
[0053]
Further, in this embodiment, the following new effects can be realized. In this embodiment, when the insulator main body 51 and the exhaust manifold 45 are connected, the two connecting pieces 55 are used in place of the rivet 52 and the connecting member 50 in the first embodiment. Accordingly, the rivet 52 and the connecting member 50 which are separate parts from the insulator body 51 and the exhaust manifold 45 are not necessary, the number of parts of the product can be reduced, and the configuration is simplified.
[0054]
In addition, the connecting piece 55 is folded back and fixed to the exhaust manifold gasket 45 after the tip is inserted into the insertion port 56 formed in the exhaust manifold gasket 45. That is, work steps such as riveting in the first embodiment are not necessary, and the number of structural steps can be reduced. Further, the material constituting the exhaust manifold gasket 45 in each of the above embodiments is an example. In the present invention, the exhaust manifold gasket 45 may be formed of a soft material such as asbestos, or a carbon layer is formed on a metal plate. The material of the gasket may not be limited.
[0055]
The scope of right of the present invention is not limited to the examples disclosed in the above embodiments, and includes a wide variety of modifications without departing from the spirit of the present invention.
[0056]
【The invention's effect】
According to the invention described in claim 1, since the heat insulator constituting the gasket-integrated heat insulator of the present invention is composed of an aluminum plate, the heat insulator body included in the present invention uses an iron plate or the like. As compared with the above, the weight can be remarkably reduced, and it is possible to reduce the number of attachment points as reinforcement parts when attaching to the exhaust manifold. Therefore, in the manufacturing process in which the exhaust manifold is assembled to the engine and the heat insulator body is assembled to the exhaust manifold, the number of manufacturing steps can be reduced and the cost can be reduced.
[0057]
In addition, since the heat insulator body is reduced in weight, even when high-temperature heat is transmitted from an exhaust manifold or the like and high-frequency vibration is transmitted to vibrate the heat insulator body itself, the heat insulator body itself vibrates. The stress applied to the place where the insulator body is attached to the exhaust manifold can be reduced, and the occurrence of cracks in the heat insulator body can be prevented.
[0058]
Further, in the present invention, the exhaust manifold gasket and the heat insulator main body attached to the exhaust manifold are integrated using a connecting member. Therefore, the gasket included in the present invention is connected to the exhaust port hole of the engine and the exhaust manifold. The heat insulator body is partially fixed in the process of sandwiching and fixing between them. Thereby, the manufacturing process required for mounting the heat insulator body to the exhaust manifold can be simplified, and this can also reduce the cost.
[0059]
According to invention of Claim 2, the said trough part and a protruding part implement | achieve the function of the rib with respect to a ridgeline equivalent site | part, and generation | occurrence | production of the excessive vibration of a heat insulator main body can be prevented. Therefore, in addition to the operation related to the first aspect, this also prevents the occurrence of cracks in the heat insulator body.
[0060]
According to the invention of claim 3, since the heat insulator body has an attachment portion that is attached to the exhaust manifold in the vicinity of the side opposite to the connection position with the connection member, the attachment portion in the heat insulator body is provided. It is possible to reduce the configuration provided in the configuration, and in the present invention, the configuration can be simplified.
[0061]
Further, in the present invention, in the process of mounting the heat insulator body to the exhaust manifold after the exhaust manifold is assembled to the engine, one end of the heat insulator body is connected to the gasket, so that the number of mounting steps can be reduced. it can. This can also reduce the number of manufacturing steps.
[0062]
According to invention of Claim 4, the connection member is respectively couple | bonded with the gasket and the heat insulator main body using the coupling piece. Even in such a case, since the gasket and the heat insulator main body are connected to each other by the connecting member having elasticity, the same operation as that described with respect to the first aspect is realized in the present invention.
[0063]
According to the invention of claim 5, the gasket is made of an elastic material, the connecting member is a connecting piece formed integrally with the gasket, and one end of the connecting piece is engaged with the heat insulator, and the gasket is formed. And the heat insulator are connected to each other.
[0064]
Therefore, when the gasket and the heat insulator main body are connected to each other, the need for using special parts for connection is eliminated, the number of parts of the product can be reduced, and the configuration is simplified.
[0065]
In addition, since the gasket and the heat insulator main body are connected to each other, the connecting piece is engaged with the gasket, so the necessity of the connecting work step assumed when using the special connecting separate part is eliminated. , Structural man-hours can be reduced.
[Brief description of the drawings]
FIG. 1 is a perspective view of an insulator 1 according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view of the insulator 1 mounted on the exhaust manifold 3;
FIG. 3 is a development view of the insulator 1;
4 is a cross-sectional view taken along section line X4-X4 in FIG.
5 is an enlarged front view of an insulator body 51 of the insulator 1. FIG.
6 is a cross-sectional view taken along section line X6-X6 in FIG.
7 is a cross-sectional view taken along section line X7-X7 in FIG.
8 is a cross-sectional view taken along section line X8-X8 in FIG.
FIG. 9 is a simplified cross-sectional view of an insulator 1;
FIG. 10 is a perspective view of an insulator 1a according to a second embodiment of the present invention.
FIG. 11 is a plan view of an insulator 1a.
12 is a cross-sectional view taken along section line X12-X12 in FIG.
[Explanation of symbols]
1, 1a Gasket integrated heat insulator
2 Engine
3 Exhaust manifold
40 Cylinder head
44 Exhaust port hole
45 Exhaust manifold gasket
50 connecting members
51 Insulator body
52, 54 bolts
53 Bolt hole
55 connecting piece
56 insertion slot

Claims (5)

A gasket interposed between the exhaust port hole of the engine and the exhaust manifold,
A heat insulator body composed of an aluminum plate provided to surround the exhaust manifold;
A gasket-integrated heat insulator comprising: a connecting member made of a flexible material that connects the gasket and the heat insulator main body to each other. The heat insulator main body has a valley portion and a raised portion extending in a first direction, and a plurality of corrugated shapes alternately formed along a second direction intersecting the first direction. Is configured to include an aluminum plate whose height and width are periodically changed along the first direction to form a three-dimensional shape,
The gasket-integrated heat insulator according to claim 1, wherein the first direction is determined in a direction intersecting with a portion corresponding to a main ridge line constituting the three-dimensional shape. 2. The gasket-integrated heat insulator according to claim 1, wherein the heat insulator main body has a mounting portion that is attached to the exhaust manifold in the vicinity of the side opposite to the coupling position with the connecting member. 2. The gasket-integrated heat insulator according to claim 1, wherein the coupling member is coupled to the gasket and the heat insulator body using coupling pieces. The gasket is made of an elastic material, and the connecting member is a connecting piece formed integrally with the gasket, and one end portion of the connecting piece is engaged with the heat insulator so that the gasket and the heat insulator are connected to each other. The gasket-integrated heat insulator according to claim 1.

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