WO2014189000A1 - ヒートインシュレータ及びその締結構造 - Google Patents
ヒートインシュレータ及びその締結構造 Download PDFInfo
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- WO2014189000A1 WO2014189000A1 PCT/JP2014/063204 JP2014063204W WO2014189000A1 WO 2014189000 A1 WO2014189000 A1 WO 2014189000A1 JP 2014063204 W JP2014063204 W JP 2014063204W WO 2014189000 A1 WO2014189000 A1 WO 2014189000A1
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- Prior art keywords
- heat insulator
- region
- fastening
- fastened
- fasteners
- Prior art date
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/11—Thermal or acoustic insulation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
- F28F13/18—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by applying coatings, e.g. radiation-absorbing, radiation-reflecting; by surface treatment, e.g. polishing
-
- 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
-
- 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
- F01N13/18—Construction facilitating manufacture, assembly, or disassembly
- F01N13/1838—Construction facilitating manufacture, assembly, or disassembly characterised by the type of connection between parts of exhaust or silencing apparatus, e.g. between housing and tubes, between tubes and baffles
- F01N13/1844—Mechanical joints
- F01N13/1855—Mechanical joints the connection being realised by using bolts, screws, rivets or the like
-
- 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
- F01N2260/08—Exhaust treating devices having provisions not otherwise provided for for preventing heat loss or temperature drop, using other means than layers of heat-insulating material
-
- 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
- F01N2450/00—Methods or apparatus for fitting, inserting or repairing different elements
- F01N2450/24—Methods or apparatus for fitting, inserting or repairing different elements by bolts, screws, rivets or the like
Definitions
- the present invention relates to a heat insulator and a fastening structure thereof.
- a vehicle such as an automobile is provided with a heat insulator for covering the exhaust manifold so that the heat radiated from the exhaust manifold of the internal combustion engine does not affect other devices.
- the heat insulator is fastened to a predetermined fastening target location in the fastening target so as not to drop off from the vehicle.
- Patent Document 1 describes that a bead for absorbing vibration is formed around a fastening portion in a heat insulator.
- An object of the present invention is to provide a heat insulator and a fastening structure thereof capable of suppressing the occurrence of cracks between fastening portions in the heat insulator.
- a heat insulator fastening structure that solves the above problems includes a heat insulator configured to cover the exhaust manifold, and a plurality of components configured to fasten the heat insulator to a fastening object in a displaceable state within a predetermined range.
- the heat insulator has one first region configured to vibrate at the same phase and one second region different from the first region and configured to vibrate at the same phase.
- At least one of the plurality of fasteners fastens the first region to the fastening object.
- At least one of the plurality of fasteners fastens the second region to the fastening object.
- a heat insulator that solves the above problems is a heat insulator that is configured to cover the exhaust manifold and is configured to be fastened to an object to be fastened by a plurality of fasteners while being displaceable within a predetermined range. And a first region having a fastening portion configured to be vibrated at the same phase and configured to be fastened to the fastening object by at least one of the plurality of fasteners, and vibrated at the same phase. And a second region having a fastening portion configured to be fastened to the fastening object by at least one of the plurality of fasteners.
- the front view which shows the whole heat insulator.
- Sectional drawing which shows the structure of a fastener.
- the graph which shows the change of the stress which acts on the heat insulator with respect to the change of an internal combustion engine rotational speed.
- the heat insulator 1 is connected to an internal combustion engine and a silencer and covers an exhaust manifold 2 that receives vibrations transmitted from them.
- the heat insulator 1 is fastened by a fastener 3 to predetermined fastening target points P1 to P4 on an exhaust manifold 2 that is a fastening target.
- the fastener 3 is fastened to the fastening target points P1 to P4 in a state where the heat insulator 1 can be displaced within a predetermined range.
- the heat insulator 1 includes a first region A1 that vibrates at the same phase as vibration is transmitted from the exhaust manifold 2, and a second region A2 that is different from the first region A1 and vibrates at the same phase. including.
- the heat insulator 1 is fastened to the fastening target points P1 to P4 by the fastener 3 in the first region A1 and the second region A2. Specifically, the heat insulator 1 is fastened to the fastening target places P1 and P2 at two places in the first area A1, and is fastened to the fastening target places P3 and P4 at two places in the second area A2. .
- region A1 is located in the upper part of the heat insulator 1
- region A2 is located in the center of the up-down direction of the heat insulator 1.
- FIG. In other words, the first region A1 is located at one of the opposite ends of the heat insulator 1, and the second region A2 is located at the center between the opposite ends.
- the fastener 3 for fastening the heat insulator 1 to the fastening target portions P1 to P4 has portions corresponding to the fastening target portions P1 to P4 in the regions A1 and A2 in the heat insulator 1.
- the support component 4 is supported in a displaceable state within the above range, and the bolt 5 is used to fix the support component 4 to the fastening target points P1 to P4.
- the support component 4 is provided with a cylindrical body 7 penetrating through a hole 6 formed in a portion corresponding to the fastening target portions P1 to P4 of the heat insulator 1.
- a washer 8 formed in a ring shape is fitted on the outer peripheral surface of one end of the cylindrical body 7 in the axial direction.
- a flange 9 is formed on the outer peripheral surface of the other end of the cylindrical body 7.
- An elastic body 10 that supports a portion around the hole 6 in the heat insulator 1 is fixed between the washer 8 and the flange 9. Then, the bolts 5 are screwed into the fastening target portions P1 to P4 in the exhaust manifold 2 in a state where the bolts 5 are passed through the cylindrical body 7 of the support component 4, whereby the fastening target portions P1 to P4 of the heat insulator 1 by the fastener 3 are screwed. The fastening to is realized. Under this state, the heat insulator 1 can be displaced by the amount of elastic deformation of the elastic body 10 in the support component 4.
- FIG. 3 is a graph showing a transition of the stress acting on a predetermined position (for example, the position PX in FIG. 1) in the heat insulator 1 during vibration accompanying a change in the rotational speed of the internal combustion engine.
- the two-dot chain line in the figure shows the stress acting on the position PX when it is assumed that the outer edge portion of the heat insulator 1 is fastened to the exhaust manifold 2 at a predetermined interval (for example, eight locations). Yes.
- the solid line in FIG. 3 shows the stress acting on the position PX when the fastening structure of the heat insulator 1 of the present embodiment shown in FIG. 1 is adopted.
- the phase of vibration in the first region A1 and the phase of vibration in the second region A2 in the heat insulator 1 may be different from each other.
- the amount and timing of displacement in the direction of approaching / separating from the fastening target locations P3 and P4 of the one fastening portion are different from each other.
- the heat insulator 1 is only fastened to the fastening target points P1 to P4 of the exhaust manifold 2 in the one first region A1 and the one second region A2. Further, in the first region A1 and the second region A2 in the heat insulator 1, the fastening target parts P1 to P4 are fastened by the fastener 3, so that the heat insulator 1 is fastened even in the fastened state. If it is within the range defined by the tool 3, it can be displaced.
- the following effects can be obtained. (1) It is possible to suppress the occurrence of cracks due to excessive twisting, pulling, and compression described above between the fastening portions of the heat insulator 1 with respect to the fastening target portions P1 to P4 by the fastener 3. Furthermore, since the occurrence of cracks can be suppressed in this way, the heat insulator 1 can be formed of a thin and soft material.
- the number of parts for fastening the heat insulator 1, that is, the number of fasteners 3, can be reduced.
- the first region A1 is located at the top of the heat insulator 1, while the second region A2 is located at the center in the vertical direction of the heat insulator 1. In this case, in the heat insulator 1, the distance between the fastening portion in the first region A1 and the fastening portion in the second region A2 can be increased.
- the heat insulator 1 is fastened to the fastening target places P1 and P2 by the fastener 3 at two places in the first area A1, and is fastened by the fastener 3 at two places in the second area A2. Fastened to locations P3 and P4. In this case, since each of the first region A1 and the second region A2 is fastened at two locations, heat is generated without stress concentration only around one fastener 3 in each region A1, A2. Fastening to the fastening target points P1 to P4 of the insulator 1 can be realized.
- the fastening by the fastener 3 is performed on the fastening target portions P1 to P4 located on the exhaust manifold 2.
- the exhaust manifold 2 complicated vibrations are generated due to vibration transmission from the internal combustion engine and vibration transmission from the silencer, and further due to temperature changes accompanying heat reception from the exhaust corresponding to each cylinder of the internal combustion engine.
- the amount and timing of displacement in the direction of approaching / separating from the fastening target locations P1 to P4 of the fastening portion due to the vibrations in the first region A1 and the second region A2 are different from each other. It becomes easy to become a thing.
- the heat insulator 1 may be fastened to an internal combustion engine, a vehicle body, or the like. That is, the heat insulator 1 may be fastened to a fastening object other than the exhaust manifold 2.
- the fastening in the first region A1 by the fastener 3 may be performed at two locations, and the fastening in the second region A2 by the fastener 3 may be performed at only one location.
- the fastening in the first region A1 by the fastener 3 may be performed at only one place while the fastening in the second region A2 by the fastener 3 is performed at two places.
- the fastening in the first region A1 by the fastener 3 may be performed at three or more locations, or the fastening in the second region A2 by the fastener 3 may be performed at three or more locations.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Thermal Sciences (AREA)
- Exhaust Silencers (AREA)
Abstract
Description
図1に示すように、ヒートインシュレータ1は、内燃機関及び消音器に繋がってそれらからの振動伝達を受けるエキゾーストマニホールド2を覆う。このヒートインシュレータ1は、締結対象物であるエキゾーストマニホールド2上の予め定められた締結対象箇所P1~P4に対し、締結具3によって締結されている。なお、同締結具3は、ヒートインシュレータ1を定められた範囲内で変位可能な状態で上記締結対象箇所P1~P4に対し締結する。ヒートインシュレータ1は、エキゾーストマニホールド2からの振動伝達に伴って、同じ位相にて振動する第1領域A1と、第1領域A1とは異なる領域であって同じ位相にて振動する第2領域A2とを含む。ヒートインシュレータ1は、第1領域A1及び第2領域A2において、締結具3によって締結対象箇所P1~P4に締結されている。詳しくは、ヒートインシュレータ1は、上記第1領域A1内の二箇所において締結対象箇所P1,P2に締結されるとともに、上記第2領域A2内の二箇所において締結対象箇所P3,P4に締結される。なお、第1領域A1はヒートインシュレータ1の上部に位置しており、第2領域A2はヒートインシュレータ1の上下方向の中央に位置している。言い換えれば、第1領域A1はヒートインシュレータ1における互いに反対側の両端部の一方に位置しており、第2領域A2はその両端部の間の中央部に位置している。
図3は、振動時のヒートインシュレータ1における所定の位置(例えば図1の位置PX)に作用する応力の内燃機関回転速度の変化に伴う推移を示すグラフである。同図の二点鎖線は、ヒートインシュレータ1の外縁部をエキゾーストマニホールド2に対し所定の間隔毎に多数箇所(例えば8箇所)で締結したと仮定したときの上記位置PXに作用する応力を示している。この場合、ヒートインシュレータ1における複数の締結部分での振動の位相が互いに異なると、それら締結部分におけるエキゾーストマニホールド2の締結対象箇所に対し接近・離間する方向についての変位の量やタイミングも互いに異なる。その結果、ヒートインシュレータ1における締結部分同士の間に過度の捻れ、引っ張り、及び圧縮が生じて図中の二点鎖線で示すように位置PXに作用する応力が大きくなる。
(1)ヒートインシュレータ1における締結具3による締結対象箇所P1~P4に対する締結部分同士の間に、上述した過度な捩れ、引っ張り、及び圧縮に起因する亀裂が生じることを抑制できる。更に、このように亀裂の発生を抑制できることから、ヒートインシュレータ1を薄く且つ柔らかい材料で形成することが可能になる。
(3)上記第1領域A1がヒートインシュレータ1の上部に位置する一方、上記第2領域A2が同ヒートインシュレータ1の上下方向の中央に位置する。この場合、ヒートインシュレータ1において、上記第1領域A1における締結部分と、上記第2領域A2における締結部分との距離を長くすることができる。このため、上記第1領域A1及び上記第2領域A2における各々の振動による締結部分の締結対象箇所P1~P4に対し接近・離間する方向についての変位の量やタイミングが互いに異なっていても、その差異に起因する影響が上記第1領域A1における締結部分と、上記第2領域A2における締結部分との間の部位に及び難くなる。
ヒートインシュレータ1は、内燃機関や車両のボディ等に締結されるものであってもよい。すなわち、ヒートインシュレータ1は、エキゾーストマニホールド2以外の締結対象物に締結されてもよい。
Claims (8)
- エキゾーストマニホールドを覆うよう構成されるヒートインシュレータと、
前記ヒートインシュレータを定められた範囲内で変位可能な状態で締結対象物に締結するよう構成される複数の締結具と、を備え、
前記ヒートインシュレータは、同じ位相にて振動するよう構成される一つの第1領域と、同第1領域とは異なるとともに同じ位相にて振動するよう構成される一つの第2領域とを有し、
前記複数の締結具の少なくとも一つが前記第1領域を前記締結対象物に締結し、
前記複数の締結具の別の少なくとも一つが前記第2領域を前記締結対象物に締結する、ヒートインシュレータ締結構造。 - 前記ヒートインシュレータは、前記第1領域と第2領域とのみで前記締結対象物に締結されるように構成される、請求項1に記載のヒートインシュレータ締結構造。
- 前記第1領域は前記ヒートインシュレータの上部に位置し、
前記第2領域は前記ヒートインシュレータの上下方向の中央に位置する、請求項1又は2に記載のヒートインシュレータ締結構造。 - 前記ヒートインシュレータは互いに反対側の両端部とその両端部の間に位置する中央部とを有し、
前記第1領域は前記両端部の一方に位置し、
前記第2領域は前記中央部に位置する、請求項1又は2に記載のヒートインシュレータ締結構造。 - 前記ヒートインシュレータは、前記第1領域内の二箇所で前記締結対象物に締結されるとともに、前記第2領域内の二箇所で前記締結対象物に締結される、請求項1~4のいずれか一項に記載のヒートインシュレータ締結構造。
- 前記ヒートインシュレータは、前記第1領域内の二箇所で前記締結対象物に締結されるとともに、前記第2領域内の一箇所で前記締結対象物に締結される、請求項1~4のいずれか一項に記載のヒートインシュレータ締結構造。
- 前記締結対象物は前記エキゾーストマニホールドである、請求項1~6のいずれか一項に記載のヒートインシュレータ締結構造。
- エキゾーストマニホールドを覆うよう構成されるとともに、定められた範囲内で変位可能な状態で複数の締結具によって締結対象物に締結されるよう構成されるヒートインシュレータであって、
同じ位相にて振動するよう構成され、前記複数の締結具の少なくとも一つによって前記締結対象物に締結されるよう構成される締結部分を有する一つの第1領域と、
同じ位相にて振動するよう構成され、前記複数の締結具の別の少なくとも一つによって前記締結対象物に締結されるよう構成される締結部分を有する一つの第2領域と、を有する、ヒートインシュレータ。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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EP14800794.1A EP3001005A4 (en) | 2013-05-21 | 2014-05-19 | THERMAL INSULATION AND FASTENING STRUCTURE |
CN201480028941.4A CN105264194A (zh) | 2013-05-21 | 2014-05-19 | 热绝缘器以及其连结结构 |
US14/891,161 US20160102929A1 (en) | 2013-05-21 | 2014-05-19 | Heat insulator and fastening structure for same |
Applications Claiming Priority (2)
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JP2013107282A JP5885258B2 (ja) | 2013-05-21 | 2013-05-21 | ヒートインシュレータの締結構造 |
JP2013-107282 | 2013-05-21 |
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EP (1) | EP3001005A4 (ja) |
JP (1) | JP5885258B2 (ja) |
CN (1) | CN105264194A (ja) |
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2013
- 2013-05-21 JP JP2013107282A patent/JP5885258B2/ja active Active
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2014
- 2014-05-19 WO PCT/JP2014/063204 patent/WO2014189000A1/ja active Application Filing
- 2014-05-19 US US14/891,161 patent/US20160102929A1/en not_active Abandoned
- 2014-05-19 EP EP14800794.1A patent/EP3001005A4/en not_active Withdrawn
- 2014-05-19 CN CN201480028941.4A patent/CN105264194A/zh active Pending
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JP2002266918A (ja) * | 2001-03-12 | 2002-09-18 | Nippon Reinz Co Ltd | 緩衝材 |
JP2005133594A (ja) * | 2003-10-29 | 2005-05-26 | Nichias Corp | 防振遮熱板 |
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US20160102929A1 (en) | 2016-04-14 |
CN105264194A (zh) | 2016-01-20 |
JP5885258B2 (ja) | 2016-03-15 |
JP2014227887A (ja) | 2014-12-08 |
EP3001005A4 (en) | 2016-05-18 |
EP3001005A1 (en) | 2016-03-30 |
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