WO2011021306A1 - インシュレータ - Google Patents
インシュレータ Download PDFInfo
- Publication number
- WO2011021306A1 WO2011021306A1 PCT/JP2009/064664 JP2009064664W WO2011021306A1 WO 2011021306 A1 WO2011021306 A1 WO 2011021306A1 JP 2009064664 W JP2009064664 W JP 2009064664W WO 2011021306 A1 WO2011021306 A1 WO 2011021306A1
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- WIPO (PCT)
- Prior art keywords
- base material
- insulator
- region
- treatment
- surface treatment
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/08—Other arrangements or adaptations of exhaust conduits
- F01N13/10—Other arrangements or adaptations of exhaust conduits of exhaust manifolds
- F01N13/102—Other arrangements or adaptations of exhaust conduits of exhaust manifolds having thermal insulation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/14—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having thermal insulation
- F01N13/148—Multiple layers of insulating material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
- F01N2260/20—Exhaust treating devices having provisions not otherwise provided for for heat or sound protection, e.g. using a shield or specially shaped outer surface of exhaust device
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31678—Of metal
Definitions
- the present invention relates to an insulator that is disposed to face an exhaust system component of an internal combustion engine with a space therebetween.
- the insulator is a member for heat shielding arranged to face an exhaust system component such as an exhaust manifold, an exhaust pipe, and a catalytic converter of an internal combustion engine with a space therebetween.
- the insulator suppresses the radiant heat from the exhaust system component from being propagated to the components disposed around the exhaust system component, thereby suppressing the thermal damage of the peripheral component. Insulators are used not only as countermeasures against heat damage to peripheral components, but also as countermeasures against noise and vibrations.
- the insulator has a metal base material having heat resistance.
- the base material of the insulator is formed of, for example, aluminum or an aluminum alloy.
- various surface treatments have been proposed for the surface of a base material of the insulator (see, for example, Patent Documents 1 and 2).
- Patent Documents 1 and 2 indicate that the thermal emissivity (thermal emissivity) of an insulator is changed by forming a film (surface coating layer) on the surface of the base material of the insulator.
- a film surface coating layer
- black processing for making the surface color of the base material surface of the insulator black. Examples of such black processing include black coating processing shown in Patent Documents 1 and 3, black alumite processing shown in Patent Document 2, and the like.
- Patent Document 4 discloses that the strength of an insulator is increased by machining the surface of the base material of the insulator.
- Patent Documents 5 and 6 Other techniques related to insulators include techniques described in Patent Documents 5 and 6, for example.
- Patent Document 5 discloses that a shock absorber is provided at the bolt mounting portion of the insulator to improve the vibration suppressing function.
- Patent Document 6 discloses that a heat transfer material, a heat insulating material, and the like are provided in a gap between the insulator and the exhaust manifold to uniformly adjust the temperature in each part of the exhaust manifold.
- JP-A-6-336923 Japanese Utility Model Publication No. 5-47339 Japanese Patent Publication No. 3-62798 JP 2004-92543 A JP 2004-360696 A JP 2008-240589 A
- the thermal emissivity of the insulator base material in order to increase the thermal emissivity of the insulator base material, if the black treatment is performed on the entire outer surface of the insulator base material, the heat radiation amount is reduced over the entire outer surface of the insulator base material. Increase. For this reason, there is a concern that thermal damage to peripheral components arranged in the vicinity of the insulator, for example, various electrical devices in the engine room of the vehicle, harnesses, hoses, and the like may increase.
- the strain resistance is reduced in the entire region of the base material of the insulator. For this reason, when vibration from a vibration source such as an exhaust manifold is transmitted to the insulator, there is a concern that cracks and the like are likely to occur in the outer edge portion of the insulator base material and the peripheral edge portion of the opening, which are easily subjected to stress due to vibration. .
- the present invention has been made in consideration of such a point, and does not provide a surface coating layer over the entire outer surface of the base material of the insulator, and does not provide a surface coating layer for a specific region.
- the purpose is to solve various problems as described above.
- the present invention is an insulator arranged to face an exhaust system component of an internal combustion engine with a space therebetween, and has a heat-resistant metal base material.
- the surface coating layer by surface treatment is not provided in a part of the outer surface on the side not facing the system parts, and the surface coating layer by surface treatment is provided in the remaining region. Yes.
- the outer surface of the base material is not provided by providing a surface coating layer for a specific region (partial region) instead of providing a surface coating layer over the entire outer surface of the base material. It is possible to eliminate various problems that occur when a surface coating layer is provided over the entire area.
- “Surface treatment” means a process in which a certain film, layer or the like is formed on a substrate, and a process (for example, machining) in which such a film, layer or the like is not formed on the substrate. It does not include.
- the following three configurations can be given as specific embodiments of the surface treatment on the outer surface of the substrate and the partial region of the outer surface of the substrate.
- the surface treatment is a surface treatment for increasing the heat radiation rate, and the partial area includes a region facing a peripheral component disposed in proximity to the outer surface of the base material.
- Configuration (referred to as “first configuration”).
- the surface treatment is a hardening treatment for increasing the strength, and the partial area includes the outer edge of the base material (referred to as “second configuration”).
- the surface treatment is a surface treatment that increases thermal emissivity and strength, and the partial area includes a region facing a peripheral component disposed in proximity to the outer surface of the substrate, and A configuration including an outer edge portion of the substrate and a peripheral portion of an opening provided in the substrate (referred to as a “third configuration”).
- the partial region where the surface treatment for increasing the heat radiation rate is not performed includes the region facing the peripheral component, the following effects can be obtained. . That is, a part of the heat radiated from a heat source such as an exhaust system component of the internal combustion engine is absorbed by the base material of the insulator and radiated (radiated) from the outer surface of the base material to the outside. In some areas on the outer surface of the base material, the heat radiation rate is lower than that in the remaining areas, so that the amount of heat released from some areas is reduced compared to the amount of heat released from the remaining areas. And compared with the case where surface treatment is given to the whole outer surface of a base material, the thermal radiation amount from a one part area
- the amount of heat received by a peripheral component placed close to the partial area from a partial region of the outer surface of the base material can be reduced, so that the temperature of the peripheral component is prevented from excessively rising. It is possible to suppress thermal damage of peripheral components.
- the remaining area on the outer surface of the base material is provided with a surface coating layer by surface treatment for increasing the heat radiation rate, so that the heat radiation from the remaining area to the outside can be increased.
- the heat dissipation of an insulator can be improved as a whole.
- the base material is preferably made of aluminum or an aluminum alloy, and the surface treatment is preferably black alumite treatment.
- the material of the base material and the surface treatment on the outer surface of the base material in the first configuration are more specifically specified.
- the material of the base material is aluminum or aluminum alloy
- the surface treatment is black alumite treatment, so that the part of the region having a low heat radiation rate and the remaining region having a high heat radiation rate are It can be easily formed on the outer surface of the substrate.
- the outer edge portion of the base material is included in the partial area where the surface treatment for increasing the strength (hardness) is not performed, the following effects are obtained. It is done. That is, in a part of the outer surface of the base material of the insulator, the strain resistance is higher than when the entire surface of the outer surface of the base material is subjected to surface treatment. For this reason, even if vibration from a vibration source such as an exhaust system component of the internal combustion engine is transmitted to the base material of the insulator, cracks and the like are unlikely to occur at the outer edge portion of the base material. Thereby, durability of the base material of an insulator is securable.
- the base material is preferably made of aluminum or an aluminum alloy, and the curing treatment is preferably an alumite treatment.
- the material of the base material and the surface treatment on the outer surface of the base material in the second configuration are more specifically specified.
- the material of the base material is aluminum or an aluminum alloy, and the surface treatment is anodized so that the partial region having high strain resistance and the remaining region having high strength (hardness) are obtained. It can be easily formed on the outer surface of the substrate.
- a region located on the back side of a part of the outer surface of the inner surface of the substrate facing the exhaust system component is a surface by surface treatment. It is also possible to provide a surface coating layer by the surface treatment in a region located on the back side of the remaining region of the outer surface of the inner surface without providing a coating layer. That is, not only for a specific area (partial area) on the outer surface of the base material but also for a specific area on the inner surface of the base material (area located behind the partial area). It is also possible not to perform the surface treatment.
- the third configuration is a combination of the first and second configurations. According to this 3rd structure, the effect similar to the effect by the 1st, 2nd structure mentioned above is acquired.
- the base material is aluminum or an aluminum alloy, and the surface treatment on the outer surface of the base material is black alumite treatment.
- the surface coating layer is not provided over the entire outer surface of the base material of the insulator, but the surface coating layer is not provided for a specific region, so that the entire surface of the outer surface of the base material is not provided.
- the surface coating layer is not provided over the entire outer surface of the base material of the insulator, but the surface coating layer is not provided for a specific region, so that the entire surface of the outer surface of the base material is not provided.
- FIG. 1 is an exploded perspective view schematically showing a cylinder head, an exhaust manifold, and an insulator of an internal combustion engine in the first embodiment.
- FIG. 2 is a diagram schematically illustrating the outer surface of the base material of the insulator according to the first embodiment.
- FIG. 3 is a diagram schematically illustrating the positional relationship between the insulator and the peripheral components.
- FIG. 4 is a diagram schematically showing a cross section of a region of the base material facing a peripheral part.
- FIG. 5 is a diagram schematically showing a cross section of a region away from the peripheral parts of the base material.
- FIG. 6 is a flowchart showing a procedure when a surface coating layer is partially formed on the outer surface of the substrate.
- FIG. 7 is a diagram illustrating an insulator according to a modification of the first embodiment, and corresponds to FIG. 4.
- FIG. 8 is a diagram illustrating the relationship between the distance from the outer surface of the substrate to the peripheral component and the surface temperature of the peripheral component.
- FIG. 9 is a diagram schematically illustrating the outer surface of the base material of the insulator according to the second embodiment.
- FIG. 10 is a diagram schematically showing a cross section of a region including the outer edge portion of the substrate.
- FIG. 11 is a diagram schematically showing a cross section of a region including a peripheral portion of an opening provided in a base material.
- FIG. 12 is a diagram illustrating an insulator according to a modification of the second embodiment, and corresponds to FIG. 10.
- FIG. 13 is a diagram illustrating an insulator according to a modification of the second embodiment, and corresponds to FIG. 11.
- FIG. 1 is an exploded perspective view schematically showing a cylinder head 11, an exhaust manifold 12 and an insulator 20 of an internal combustion engine 10 in the first embodiment.
- the internal combustion engine 10 is configured as an in-line four-cylinder type, and an exhaust port opening 11 a is formed at four locations on the side surface of the cylinder head 11.
- a cylinder block is attached to the lower part of the cylinder head 11, and a head cover is attached to the upper part.
- the exhaust system of the internal combustion engine 10 is provided with exhaust system parts such as an exhaust manifold 12, an exhaust pipe, a catalytic converter, and a muffler (not shown). Exhaust gases discharged from the exhaust ports of the cylinder head 11 of the internal combustion engine 10 are collected by the exhaust manifold 12. The exhaust gas collected by the exhaust manifold 12 is purified by a catalytic converter, then silenced by a muffler, and discharged to the outside.
- the exhaust manifold 12 includes four branch pipes 12a corresponding to each cylinder of the internal combustion engine 10, and a merging pipe 12b that joins the downstream ends of the branch pipes 12a.
- a flange 12c is integrally attached to the upstream end of each branch pipe 12a by means such as welding. By attaching the flange 12 c to the side surface of the cylinder head 11, the exhaust manifold 12 is integrally attached to the cylinder head 11.
- a flange 12d is integrally attached to the downstream end of the junction pipe 12b by means such as welding.
- the exhaust manifold 12 is connected to the downstream exhaust pipe via the flange 12d.
- An insulator 20 having a heat insulating function, a sound insulating function, a vibration suppressing function, and the like is provided on the outside of the exhaust manifold 12.
- the insulator 20 is shaped to cover the upper part of the exhaust manifold 12 from above.
- the insulator 20 is disposed to face the exhaust manifold 12 with a space therebetween.
- the insulator 20 is attached to the exhaust manifold 12 by means such as bolting.
- the insulator 20 includes a metal base material 21 having heat resistance.
- the insulator 20 is constituted by a single base material 21.
- the base material 21 is a thin member made of aluminum or an aluminum alloy.
- the base material 21 is provided with a protruding portion 21a that protrudes in the same direction as the direction in which the merging pipe 12b of the exhaust manifold 12 is bent.
- the surface facing the exhaust manifold 12 is referred to as an inner surface 23, and the surface not facing the exhaust manifold 12 is referred to as an outer surface 24 (see FIG. 4 and the like). ).
- the characteristic part of this embodiment is that the surface treatment is not performed on a specific region instead of performing the surface treatment on the entire outer surface 24 of the base material 21 of the insulator 20. Specifically, a surface coating layer by a surface treatment for increasing the heat radiation rate (heat radiation rate) is not provided in a part of the outer surface 24 of the base material 21, but heat radiation is applied to the remaining region. It is characterized in that a surface coating layer 25 is provided by surface treatment for increasing the rate.
- heat radiation rate heat radiation rate
- Region 24b is included.
- the second region 24b is a region of the outer surface 24 of the base material 21 excluding the first region 24a.
- the first region 24a corresponds to the partial region described above, and the first region 24a is not subjected to surface treatment for increasing the heat radiation rate.
- the outer surface 24 of the substrate 21 appears outside.
- the first region 24 a is a region facing a peripheral component (simply referred to as “peripheral component”) disposed in proximity to the outer surface 24 of the base material 21.
- the peripheral components are an intermediate shaft 30 and a bellows pipe 31 of a vehicle steering device.
- a recess 21 b is formed in the base material 21 so that the base material 21 of the insulator 20 faces the intermediate shaft 30 and the like with a predetermined interval.
- the recessed portion 21b is provided at the base portion of the protruding portion 21a. In this case, a region including the outer surface of the recessed portion 21b is the first region 24a.
- the second area 24b is an area away from the peripheral parts.
- the second region 24b corresponds to the remaining region described above, and surface treatment for increasing the heat radiation rate is performed on the second region 24b.
- the surface coating layer 25 is formed in the second region 24b.
- a masking step (step ST11) is performed.
- masking is performed on the surface of the outer surface 24 of the base material 21 where the surface treatment is not performed.
- Masking can be performed, for example, by attaching a masking tape or the like on the surface of a region where surface treatment is not performed.
- the process proceeds to a surface treatment process (step ST12) for the outer surface 24 of the base material 21 of the insulator 20.
- the surface treatment is performed on the area where masking is not performed, and the surface treatment is not performed on the area where masking is performed.
- the masking is removed from the outer surface 24 of the base material 21 of the insulator 20.
- “Surface treatment” means a treatment in which a certain film, layer, or the like such as the surface coating layer 25 is formed on the base material 21, and a process in which such a film, layer, or the like is not formed (for example, , Machining) and the like. Note that masking is not included in the “surface treatment” mentioned here.
- black alumite treatment is performed as a surface treatment for increasing the heat radiation rate.
- the black alumite treatment is a treatment in which an oxide film of Al 2 O 3 is formed by anodic oxidation (anodite treatment), and the oxide film of Al 2 O 3 is colored black.
- the Al 2 O 3 oxide film is a porous film, for example, the Al 2 O 3 oxide film may be colored black by adsorbing a black dye to the Al 2 O 3 oxide film. Is possible.
- the black alumite treatment is performed on the outer surface 24 of the base material 21 of the insulator 20 before the black alumite treatment is performed on the outer surface 24 of the base material 21 of the insulator 20, masking is performed on the first region 24 a of the outer surface 24 of the base material 21. For this reason, the black alumite process is not performed on the first area 24a where masking is performed, whereas the black alumite process is performed on the second area 24b where masking is not performed.
- the surface coating layer 25 colored in black is formed in the second region 24 b of the outer surface 24 of the substrate 21.
- the surface film layer is not formed in the first region 24 a of the outer surface 24 of the base material 21, and the outer surface 24 of the base material 21 having a glossy color (for example, silver) is formed. Appears outside.
- the outer surface 24 of the base material 21 of the insulator 20 is provided with a first region 24a having a glossy surface color and a second region 24b having a black surface color.
- the first region 24a having a glossy surface color has a lower heat emissivity than the second region 24b having a black surface color.
- the surface coating layer 25 is formed over the entire inner surface 23.
- the first region 24a that is not subjected to the surface treatment for increasing the heat radiation rate includes a region facing the peripheral component, the following effects can be obtained.
- a part of the heat radiated from the heat source such as the exhaust manifold 12 is absorbed by the base material 21 of the insulator 20 and radiated (radiated) from the outer surface 24 of the base material 21 to the outside.
- the heat radiation rate is lower than that of the second region 24b. Therefore, the amount of heat released from the first region 24a is the second region. The amount of heat released from 24b is reduced.
- region 24a is reduced.
- the surface coating layer 25 colored in black is provided in the second region 24b of the outer surface 24 of the base material 21 of the insulator 20, the amount of heat radiation from the second region 24b to the outside increases. Is done. Thereby, the heat dissipation of the insulator 20 can be improved as a whole.
- the material of the base material 21 of the insulator 20 is aluminum or an aluminum alloy and the surface treatment to the outer surface 24 of the base material 21 is black alumite treatment
- the first region having a low thermal emissivity. 24 a and the second region 24 b having a high thermal emissivity can be easily formed on the outer surface 24 of the base material 21.
- the first region 24a having a low heat radiation rate and the second heat radiation rate having a high heat radiation rate can be obtained by a simple means of partially masking the outer surface 24 of the substrate 21.
- the region 24 b can be easily formed on the outer surface 24 of the base material 21.
- the intermediate shaft 30 or the like of the steering device has been described as an example of the peripheral component.
- the peripheral component is not particularly limited as long as it is disposed close to the outer surface 24 of the base material 21 of the insulator 20.
- Examples of such peripheral parts include various electrical equipment, harnesses, hoses, and the like.
- the surface treatment for increasing the heat radiation rate may be a treatment other than the black alumite treatment.
- a black coating process may be performed on the outer surface 24 of the base material 21 of the insulator 20. Even when the black coating process is performed on the outer surface 24 of the base material 21 of the insulator 20, the first region 24a of the outer surface 24 of the base material 21 may be masked prior to the black coating process.
- the surface coating layer 25 by black alumite processing should just be provided in the area
- masking may be performed on the surfaces of the specific regions 23a and 24a of the both surfaces 23 and 24 of the base material 21 prior to the black alumite treatment on the both surfaces 23 and 24 of the base material 21 of the insulator 20.
- FIG. 8 shows experimental data relating to the heat damage suppression effect of peripheral components.
- This experimental data shows the relationship between the distance from the outer surface 24 of the base material 21 of the insulator 20 to the rubber hose and the surface temperature of the rubber hose. A rubber hose is used as a peripheral part.
- the two-dot chain line indicates the case of this modification, that is, the case where the surface coating layer is not formed in a specific region of both surfaces 23 and 24 of the base material 21 (when both surfaces are silver).
- the broken line indicates the case of the above-described embodiment, that is, the case where the surface coating layer is not formed in a specific region of the outer surface 24 of the base material 21 (when the outer surface is silver and the inner surface is black).
- the solid line indicates the case of the comparative example, that is, the case where the surface coating layer is formed over the entire area of both surfaces 23 and 24 of the base material 21 (when both surfaces are black).
- the surface temperature of the peripheral component increases as the distance from the outer surface 24 of the base material 21 of the insulator 20 to the peripheral component decreases. In other words, the closer the peripheral component is disposed to the outer surface 24 of the base material 21, the greater the amount of heat received by the peripheral component.
- the surface temperature of the peripheral component is lower than that in the comparative example, and the peripheral component is close to the outer surface 24 of the base material 21. The lower the surface temperature of the peripheral components, the greater the arrangement.
- a surface treatment for increasing the heat radiation rate should not be performed on a specific region of the outer surface 23 of the base material 21 of the insulator 20 or a specific region of both surfaces 23 and 24. It can be seen that is an effective means.
- the schematic configuration of the insulator 120 according to this embodiment is substantially the same as that of the insulator 20 according to the first embodiment (see FIG. 1).
- the schematic configuration of the insulator 120 is different from the insulator 20 of the first embodiment in that a plurality of openings 126 are formed in the base material 121 of the insulator 120.
- the opening 126 serves as an inlet and outlet for circulating air (for example, traveling air) that flows in the engine room of the vehicle in which the internal combustion engine 10 is installed.
- each opening 126 is formed in a substantially circular shape.
- the characteristic part of this embodiment is that the surface treatment is not performed on a specific region, not the entire surface of the outer surface 124 of the base material 121 of the insulator 120. Specifically, a surface coating layer by surface treatment that increases strength (hardness) is not provided in a part of the outer surface 124 of the base material 121, but the remaining region is subjected to surface treatment that increases strength. A surface coating layer (surface hardened layer) 125 is provided.
- this characteristic part will be described in detail with reference to FIGS.
- Region 124b is included.
- the second region 124b is a region of the outer surface 124 of the base material 121 excluding the first region 124a.
- the first region 124a corresponds to a part of the above-described region, and the first region 124a is not subjected to surface treatment for increasing the strength.
- the outer surface 124 of the substrate 121 appears outside.
- the first region 124 a is a region that is susceptible to stress due to vibration of the base material 121.
- the outer edge portion 121c of the base material 121 is a region having a predetermined width W1 from the outer edge 121d of the base material 121, as shown in FIG.
- the width W1 of the outer edge 121c of the base 121 is set to 1 to 50 mm, for example.
- the peripheral part 121e of the opening 126 of the base material 121 is a region having a predetermined width W2 from the peripheral edge 121f of the opening 126, as shown in FIG.
- the width W2 of the peripheral edge 121e of the substrate 121 is set to 1 to 50 mm, for example.
- the second region 124b is a region away from the outer edge portion 121c of the base material 121 and the peripheral edge portion 121e of the opening 126.
- the second region 124b corresponds to the remaining region described above, and surface treatment for increasing the strength is performed on the second region 124b.
- surface treatment as shown in FIGS. 10 and 11, a hardened surface layer 125 is formed in the second region 124b.
- the surface treatment is not performed on a specific region of the outer surface 124 of the base material 121 of the insulator 120, so that the outer surface 124 of the base material 121 of the insulator 120 is not subjected to surface treatment.
- a masking process is performed prior to the surface treatment (see FIG. 6).
- a curing treatment such as an alumite treatment is performed.
- a hardened surface layer 125 made of Al 2 O 3 is formed on the outer surface 124 of the base material 121.
- masking is performed on the first region 124 a of the outer surface 124 of the base material 121.
- the alumite process is not performed on the first area 124a where masking is performed, whereas the alumite process is performed on the second area 124b where masking is not performed.
- a hardened surface layer 125 is formed in the second region 124 b of the outer surface 124 of the substrate 121.
- the surface hardened layer is not formed in the first region 124a of the outer surface 124 of the base material 121, and the outer surface 124 of the base material 121 appears outside.
- the outer surface 124 of the base material 121 of the insulator 120 is provided with the first region 124a where the surface hardened layer is not formed and the second region 124b where the surface hardened layer 125 is formed.
- the strength (hardness) is lower than that in the second region 124b in which the hardened surface layer 125 is formed, but the flexibility is increased and the strain resistance is increased. The nature is getting higher.
- the first region 124a where the surface treatment for increasing the strength (hardness) is not performed includes the outer edge portion 121c of the base material 121 and the peripheral edge portion 121e of the opening 126 that are susceptible to stress due to vibration. Therefore, the following effects can be obtained.
- the outer edge portion 121c of the base material 121 of the insulator 120 and the peripheral edge portion 121e of the opening 126 have higher strain resistance than the case where the entire surface of the outer surface 124 of the base material 121 is subjected to surface treatment. For this reason, even if vibration from a vibration source such as the exhaust manifold 12 is transmitted to the base material 121 of the insulator 120, cracks and the like are unlikely to occur in the outer edge portion 121c of the base material 121 and the peripheral edge portion 121e of the opening 126. Thereby, durability of the base material 121 of the insulator 120 can be ensured.
- the base material 121 of the insulator 120 is made of aluminum or an aluminum alloy and the surface treatment of the outer surface 124 of the base material 121 is anodized, the first region 124a having high strain resistance is used. And the 2nd area
- FIG. prior to performing the alumite treatment, the first region 124a having high strain resistance and the second region 124b having high strength can be obtained by simple means of partially masking the outer surface 124 of the base material 121. Can be easily formed on the outer surface 124 of the substrate 121.
- the opening 126 is provided in the base material 121 of the insulator 120 has been described above.
- the surface treatment for increasing the strength is performed only on the outer edge portion of the base material. You don't have to. That is, only the outer edge portion of the base material is the first region described above. In this case, it is only necessary to mask only the outer edge portion of the substrate prior to the surface treatment.
- the surface treatment for increasing the strength may be a hardening treatment other than the alumite treatment.
- the first region 124a of the outer surface 124 of the substrate 121 may be masked prior to the curing process.
- region of the outer surface 124 of the base material 121 of the insulator 120 above was given, not only the specific area
- a surface hardened layer 125 by anodizing may be provided in a region 123b located on the back side of the second region 124b of the outer surface 124.
- masking may be performed on the surfaces of specific regions 123a and 124a of both surfaces 123 and 124 of the base material 121 prior to the alumite treatment on both surfaces 123 and 124 of the base material 121 of the insulator 120.
- the effect that the durability of the base material 121 of the insulator 120 can be ensured is obtained as in the case of the above-described embodiment.
- the durability of the base material 121 of the insulator 120 can be further increased. become.
- the present invention can also be applied to a configuration in which the first and second embodiments are combined.
- the surface treatment for increasing the heat radiation rate and the strength is not performed on a part of the outer surface of the insulator base material, and the surface treatment for increasing the heat radiation rate and the strength is performed on the remaining region.
- region of the outer surface of a base material contains the area
- the base material of the insulator is aluminum or an aluminum alloy
- the surface treatment on the outer surface of the base material is black alumite treatment.
- the insulator is configured by only one base material.
- the present invention can be applied to an insulator having a plurality of base materials.
- the insulator may have a configuration in which two base materials are laminated.
- a sound absorbing member, a vibration absorbing member, or the like may be sandwiched between the two base materials to be stacked.
- the outer surface of the base material refers to a surface that does not face the exhaust manifold, that is, an outer surface of the base material that is disposed on the outermost side.
- the inner surface of a base material says the surface of the side facing an exhaust manifold, ie, the inner surface of the base material arrange
- the present invention can be applied to an insulator in which a base material is processed such as corrugation.
- the present invention is applied to the insulator that covers the upper side of the exhaust manifold.
- the present invention can also be applied to an insulator that covers the other part of the exhaust manifold.
- the present invention can also be applied to an insulator that covers substantially the entire exhaust manifold.
- the present invention can be applied to an insulator having a structure divided into a plurality of parts.
- the insulator can be divided into a portion that covers the upper side of the exhaust manifold and a portion that covers the lower side of the exhaust manifold.
- the present invention can be applied to each divided part of the insulator.
- the present invention can also be applied to an insulator that covers exhaust system parts of an internal combustion engine other than the exhaust manifold.
- the exhaust system parts of the internal combustion engine include an exhaust pipe, a catalytic converter, and a muffler.
- the present invention can be used for an insulator that is disposed to face an exhaust system component of an internal combustion engine with a space therebetween.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Silencers (AREA)
Abstract
Description
12 エキゾーストマニホールド
20 インシュレータ
21 基材
24 外表面
24a 第1の領域(一部の領域)
24b 第2の領域(残りの領域)
25 表面被覆層
第1実施形態に係るインシュレータ20について、図1~図6を参照して説明する。
第2実施形態に係るインシュレータ120について、図9~図11を参照して説明する。
本発明は、上記第1、第2実施形態のみに限定されるものではなく、特許請求の範囲内および当該範囲と均等の範囲で包含されるすべての変形や応用が可能である。
Claims (11)
- 内燃機関の排気系部品と間隔をあけて対向して配置されたインシュレータにおいて、
耐熱性を有する金属製の基材を有しており、
上記基材の、上記排気系部品とは対向しない側の外表面の一部の領域には表面処理による表面被覆層が設けられておらず、残りの領域には表面処理による表面被覆層が設けられていることを特徴とするインシュレータ。 - 請求項1に記載のインシュレータにおいて、
上記一部の領域には、上記表面処理に先立ってマスキングが行われることを特徴とするインシュレータ。 - 請求項1または2に記載のインシュレータにおいて、
上記表面処理は、熱輻射率を高める表面処理であって、
上記一部の領域には、上記基材の外表面に近接して配置された周辺部品に対向する領域が含まれていることを特徴とするインシュレータ。 - 請求項3に記載のインシュレータにおいて、
上記基材は、アルミニウムまたはアルミニウム合金からなり、
上記表面処理は、黒色アルマイト処理であることを特徴とするインシュレータ。 - 請求項3または4に記載のインシュレータにおいて、
上記基材の上記排気系部品と対向する側の内表面のうち、上記外表面の一部の領域の裏側に位置する領域には表面処理による表面被覆層が設けられておらず、
上記内表面のうち、上記外表面の残りの領域の裏側に位置する領域には上記表面処理よる表面被覆層が設けられていることを特徴とするインシュレータ。 - 請求項1または2に記載のインシュレータにおいて、
上記表面処理は、強度を高める硬化処理であって、
上記一部の領域には、上記基材の外縁部が含まれていることを特徴とするインシュレータ。 - 請求項6に記載のインシュレータにおいて、
上記基材に開口が形成される場合、上記一部の領域には、上記開口の周縁部も含まれていることを特徴とするインシュレータ。 - 請求項6または7に記載のインシュレータにおいて、
上記基材は、アルミニウムまたはアルミニウム合金からなり、
上記硬化処理は、アルマイト処理であることを特徴とするインシュレータ。 - 請求項6~8のいずれか1つに記載のインシュレータにおいて、
上記基材の上記排気系部品と対向する側の内表面のうち、上記外表面の一部の領域の裏側に位置する領域には表面処理による表面被覆層が設けられておらず、
上記内表面のうち、上記外表面の残りの領域の裏側に位置する領域には上記表面処理よる表面被覆層が設けられていることを特徴とするインシュレータ。 - 請求項1または2に記載のインシュレータにおいて、
上記表面処理は、熱輻射率および強度を高める表面処理であって、
上記一部の領域には、上記基材の外表面に近接して配置された周辺部品に対向する領域、ならびに、上記基材の外縁部および上記基材に設けられた開口の周縁部が含まれていることを特徴とするインシュレータ。 - 請求項10に記載のインシュレータにおいて、
上記基材は、アルミニウムまたはアルミニウム合金からなり、
上記表面処理は、黒色アルマイト処理であることを特徴とするインシュレータ。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2009/064664 WO2011021306A1 (ja) | 2009-08-21 | 2009-08-21 | インシュレータ |
CN200980161044XA CN102625876A (zh) | 2009-08-21 | 2009-08-21 | 绝缘体 |
DE200911005163 DE112009005163B8 (de) | 2009-08-21 | 2009-08-21 | Isolierung für eine Komponente einer Abgasanlage |
US13/391,545 US20120148853A1 (en) | 2009-08-21 | 2009-08-21 | Insulator |
JP2011527545A JP5320468B2 (ja) | 2009-08-21 | 2009-08-21 | インシュレータ |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2009/064664 WO2011021306A1 (ja) | 2009-08-21 | 2009-08-21 | インシュレータ |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2011021306A1 true WO2011021306A1 (ja) | 2011-02-24 |
Family
ID=43606768
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2009/064664 WO2011021306A1 (ja) | 2009-08-21 | 2009-08-21 | インシュレータ |
Country Status (5)
Country | Link |
---|---|
US (1) | US20120148853A1 (ja) |
JP (1) | JP5320468B2 (ja) |
CN (1) | CN102625876A (ja) |
DE (1) | DE112009005163B8 (ja) |
WO (1) | WO2011021306A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013019485A (ja) * | 2011-07-12 | 2013-01-31 | Nichias Corp | 配管カバー、配管構造体および車輌 |
JP2015190443A (ja) * | 2014-03-28 | 2015-11-02 | ダイハツ工業株式会社 | 車両用内燃機関の排気マニホールド用遮熱カバー |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN104033220A (zh) * | 2014-05-27 | 2014-09-10 | 东莞市石碣宇商电子厂 | 一种汽车尾气的改善方法 |
DE102018121723A1 (de) * | 2018-09-06 | 2020-03-12 | Man Truck & Bus Se | Zylinderkopf für eine Brennkraftmaschine und Verfahren zu dessen Herstellung |
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JPH0547339U (ja) * | 1991-11-26 | 1993-06-22 | マツダ株式会社 | エンジンの排気管用インシュレータ |
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JP2009133214A (ja) * | 2007-11-28 | 2009-06-18 | Ibiden Co Ltd | 排気管 |
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JPH06336923A (ja) * | 1993-05-31 | 1994-12-06 | Toyota Motor Corp | 排気マニホールド用ヒートインシュレータ |
JP2004092543A (ja) * | 2002-08-30 | 2004-03-25 | Sanwa Packing Kogyo Co Ltd | カバー装置 |
JP4446686B2 (ja) * | 2003-06-02 | 2010-04-07 | 三和パッキング工業株式会社 | 緩衝装置及び金属製カバー |
US8186325B2 (en) * | 2006-01-05 | 2012-05-29 | Federal-Mogul World Wide, Inc. | Heat shield having locating and retention features |
JP2008240589A (ja) * | 2007-03-27 | 2008-10-09 | Kokusan Buhin Kogyo Kk | エンジンの排気構造 |
JP4941126B2 (ja) * | 2007-06-27 | 2012-05-30 | 国産部品工業株式会社 | 遮音カバー |
JP2010018831A (ja) * | 2008-07-09 | 2010-01-28 | Ibiden Co Ltd | 受熱部材、及び、排気管放熱システム |
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2009
- 2009-08-21 WO PCT/JP2009/064664 patent/WO2011021306A1/ja active Application Filing
- 2009-08-21 JP JP2011527545A patent/JP5320468B2/ja active Active
- 2009-08-21 DE DE200911005163 patent/DE112009005163B8/de active Active
- 2009-08-21 US US13/391,545 patent/US20120148853A1/en not_active Abandoned
- 2009-08-21 CN CN200980161044XA patent/CN102625876A/zh active Pending
Patent Citations (5)
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JPS6127633B2 (ja) * | 1977-07-25 | 1986-06-26 | Toyota Motor Co Ltd | |
JPS6157120U (ja) * | 1984-09-19 | 1986-04-17 | ||
JPH0547339U (ja) * | 1991-11-26 | 1993-06-22 | マツダ株式会社 | エンジンの排気管用インシュレータ |
JP2581900Y2 (ja) * | 1992-04-20 | 1998-09-24 | いすゞ自動車株式会社 | 遮熱構造の排気マニホルド |
JP2009133214A (ja) * | 2007-11-28 | 2009-06-18 | Ibiden Co Ltd | 排気管 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2013019485A (ja) * | 2011-07-12 | 2013-01-31 | Nichias Corp | 配管カバー、配管構造体および車輌 |
JP2015190443A (ja) * | 2014-03-28 | 2015-11-02 | ダイハツ工業株式会社 | 車両用内燃機関の排気マニホールド用遮熱カバー |
Also Published As
Publication number | Publication date |
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DE112009005163B8 (de) | 2014-12-18 |
JPWO2011021306A1 (ja) | 2013-01-17 |
US20120148853A1 (en) | 2012-06-14 |
JP5320468B2 (ja) | 2013-10-23 |
DE112009005163T5 (de) | 2012-07-05 |
CN102625876A (zh) | 2012-08-01 |
DE112009005163B4 (de) | 2014-10-09 |
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