WO2016076150A1 - 吸気音低減装置 - Google Patents
吸気音低減装置 Download PDFInfo
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- WO2016076150A1 WO2016076150A1 PCT/JP2015/080875 JP2015080875W WO2016076150A1 WO 2016076150 A1 WO2016076150 A1 WO 2016076150A1 JP 2015080875 W JP2015080875 W JP 2015080875W WO 2016076150 A1 WO2016076150 A1 WO 2016076150A1
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- Prior art keywords
- width
- reduction device
- linear
- intake
- noise reduction
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- 230000007423 decrease Effects 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 230000002159 abnormal effect Effects 0.000 description 5
- 229920001971 elastomer Polymers 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 239000000806 elastomer Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003434 inspiratory effect Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
- F02M35/1205—Flow throttling or guiding
- F02M35/1222—Flow throttling or guiding by using adjustable or movable elements, e.g. valves, membranes, bellows, expanding or shrinking elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10242—Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
- F02M35/10301—Flexible, resilient, pivotally or movable parts; Membranes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
- F02M35/1205—Flow throttling or guiding
- F02M35/1211—Flow throttling or guiding by using inserts in the air intake flow path, e.g. baffles, throttles or orifices; Flow guides
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10242—Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
- F02M35/10262—Flow guides, obstructions, deflectors or the like
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10242—Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
- F02M35/10295—Damping means, e.g. tranquillising chamber to dampen air oscillations
Definitions
- the present invention relates to an intake noise reduction device that is disposed in an intake pipe and reduces intake noise.
- a throttle valve In the intake pipe, a throttle valve is provided to control the intake air amount.
- a technology for rectifying the air flow by providing a rectifying net composed of a linear portion provided in a mesh shape on the downstream side of the throttle valve is known. It has been.
- a technique is also known in which this rectifying net is provided in an annular gasket that seals a gap between the end face of one of the two pipes constituting the intake pipe and the end face of the other pipe.
- the rectifying net is made of a highly rigid material such as metal, and the gasket is made of an elastic body such as rubber.
- an intake sound reduction device is also known in which the rectifying net is also made of an elastic body and integrally includes the rectifying net portion and the gasket portion (see Patent Document 1).
- the rectifying net portion when the rectifying net portion is made of an elastic body, unlike the case of being made of a highly rigid material such as metal, it has a property of being easily deformed. For this reason, in the case of the rectifying net portion made of an elastic body, it is desirable that the elastic rectifying net portion has a configuration that is not easily deformed in order to enhance durability.
- the linear portion is simply increased in thickness, the mesh is narrowed and air flow is hindered. When the air flow is inhibited, the flow rate is reduced, so that the required amount of air to the engine is not secured and combustion efficiency is deteriorated. For this reason, simply thickening the linear portion is not sufficient as a measure for suppressing deformation of the rectifying net portion.
- An object of the present invention is to provide an intake noise reduction device capable of suppressing deformation of a rectifying net portion made of an elastic body.
- the present invention employs the following means in order to solve the above problems.
- the intake noise reduction device of the present invention is An annular gasket portion that seals a gap between an end face of one of the two pipes constituting the intake pipe and an end face of the other pipe;
- a rectifying net part that is integrally provided inside the gasket part and is configured by a linear part provided in a mesh shape, and reduces the intake noise by rectifying the air flow;
- An intake sound reduction device made of an elastic body that is disposed on the downstream side of the throttle valve in the intake pipe and reduces intake sound,
- the mesh-like linear part constituting the rectifying net part is composed of a first linear part extending in the radial direction and a second linear part extending in the circumferential direction, Comparing the widths of any two locations in the first linear portion, the width of the radially outer portion of the two portions is wider than or equal to the width of the radially inner portion, and is the most radial direction
- the width of the outer portion is characterized by being wider than the width of the innermost portion in the radial direction.
- the first linear portion extending in the radial direction among the mesh-like linear portions is wider at the radially outer portion than at the radially inner portion. Therefore, the rigidity of the radially outer portion of the first linear portion can be increased, and the deformation of the entire rectifying net portion can be suppressed.
- part of a radial direction outside the 1st linear part is the vicinity of the site
- the width of the first linear portion is preferably narrowed stepwise from the radially outer side to the inner side.
- variety of a 1st linear part may be narrowed only 1 step
- the width of the first linear portion may gradually narrow from the radially outer side to the inner side.
- FIG. 1 is a plan view of an intake noise reduction device according to Embodiment 1 of the present invention.
- FIG. 2 is a schematic cross-sectional view of the intake noise reduction device according to the first embodiment of the present invention.
- FIG. 3 is a schematic cross-sectional view of the intake noise reduction device according to the first embodiment of the present invention.
- FIG. 4 is a schematic cross-sectional view of the intake noise reduction device according to Embodiment 1 of the present invention.
- FIG. 5 is a schematic cross-sectional view showing a state in use of the intake sound reduction device according to Embodiment 1 of the present invention.
- FIG. 6 is a plan view of an intake noise reduction device according to Embodiment 2 of the present invention.
- FIG. 7 is a schematic cross-sectional view of an intake noise reduction device according to Embodiment 2 of the present invention.
- FIG. 8 is a schematic cross-sectional view of an intake noise reduction device according to Embodiment 2 of the present invention.
- FIG. 1 is a plan view of an intake noise reduction device according to Embodiment 1 of the present invention.
- FIG. 2 is a schematic cross-sectional view of the intake noise reduction device according to the first embodiment of the present invention, and is a cross-sectional view taken along the line AA in FIG.
- FIG. 3 is a schematic cross-sectional view of the intake noise reduction device according to the first embodiment of the present invention, and is a cross-sectional view taken along the line BB in FIG.
- FIG. 1 is a plan view of an intake noise reduction device according to Embodiment 1 of the present invention.
- FIG. 2 is a schematic cross-sectional view of the intake noise reduction device according to the first embodiment of the present invention, and is a cross-sectional view taken along the line AA in FIG.
- FIG. 3 is a schematic cross-sectional view of the intake noise reduction device according to the first embodiment of the present invention, and is a cross-sectional view taken along the line BB in FIG.
- FIG. 4 is a schematic cross-sectional view of the intake noise reduction device according to the first embodiment of the present invention, which is a cross-sectional view taken along CC in FIG.
- FIG. 5 is a schematic cross-sectional view showing a state in use of the intake sound reduction device according to Embodiment 1 of the present invention.
- the cross-sectional view of the intake noise reduction device in FIG. 5 corresponds to the XX cross-sectional view in FIG.
- the intake sound reduction device 100 is configured by an elastic body such as various rubber materials or resin elastomers.
- the intake sound reduction device 100 includes an annular gasket part 110 and a rectifying net part 120.
- the rectifying net part 120 is integrally provided inside the gasket part 110 (inside in the radial direction).
- the intake sound reduction device 100 that integrally includes the gasket portion 110 and the rectifying net portion 120 can be formed by molding. Since the technique relating to mold forming is well known, its description is omitted.
- the gasket part 110 plays the role which seals the clearance gap between the end surface of one pipe
- network part 120 is comprised by the linear part provided in mesh shape, and has played the role which reduces intake sound by rectifying
- the intake sound reduction device 100 is disposed downstream of the throttle valve 400 in the intake pipe (downstream in the direction of air flow during intake). Further, in the present embodiment, the intake noise reduction device 100 is disposed in the vicinity of the connection portion between the intake manifold 200 (one pipe) and the throttle body 300 (the other pipe) constituting the intake pipe.
- the intake pipe has a cylindrical shape, and its inner peripheral surface is a cylindrical surface.
- the throttle valve 400 includes a rotation shaft 410 and a disk-shaped valve body 420 that is fixed to the rotation shaft 410 and rotates together with the rotation shaft 410.
- the rotation shaft 410 of the throttle valve 400 is installed so as to extend in the horizontal direction.
- the throttle valve 400 is configured such that the valve is opened by rotating in the direction of arrow R in FIG. 5, and the valve is closed by rotating to the opposite side.
- an upper air flow A1 and a lower air flow A2 in the intake pipe are generated (see FIG. 5). These air flows A1 and A2 are not parallel to the intake pipe, the upper air flow A1 flows from the upper side to the lower side, and the lower air flow A2 goes from the lower side to the upper side. And flow. Thereafter, the throttle valve 400 is opened until it becomes horizontal. In the state where the throttle valve 400 is fully opened, the air flows substantially in parallel with the intake pipe.
- the gasket portion 110 has an annular shape.
- the gasket portion 110 is formed by an annular notch 210 formed along the inner periphery of the end face of the intake manifold 200 and an annular notch 310 formed along the inner periphery of the end face of the throttle body 300. It arrange
- the gasket part 110 exhibits the function which seals the clearance gap between these end surfaces by being pinched
- the distance between the throttle valve 400 and the rectifying net portion 120 is shorter than the length from the pivot shaft 410 of the throttle valve 400 to the tip of the valve body 420.
- the rectifying net portion 120 is provided so as to occupy a substantially half region inside the gasket portion 110 having a circular planar shape so that the throttle valve 400 does not hit the rectifying net portion 120.
- the remaining substantially semicircular region is a cavity.
- the semicircular region in which the rectifying net portion 120 is provided is disposed in the upper portion, and the hollow semicircular region is disposed in the lower portion. .
- the rectifying net portion 120 is provided inside the gasket portion 110 having a circular planar shape.
- the rectifying net portion 120 has a plurality of linear portions extending radially outward from the center of the circle of the gasket portion 110 (hereinafter referred to as a first linear portion 121) and the center of the circle.
- a first linear portion 121 a plurality of linear portions
- second linear portions 122 a plurality of linear portions
- a mesh is formed by the plurality of first linear portions 121 and the plurality of second linear portions 122.
- the angles between the adjacent first linear portions 121 are set to be approximately equal. Further, the radial intervals between the adjacent second linear portions 122 are set to be approximately equal. As a result, the mesh of the rectifying net portion 120 is fine near the center of the circle of the gasket portion 110 and becomes rougher as it goes away from the center.
- the width of the radially outer portion of the two locations is wider than the width of the radially inner portion.
- the first linear portion 121 is designed so that the width of the outermost radial portion is wider than the width of the innermost radial portion.
- the width of the linear portion is a width when viewed in a direction in which air flows when the throttle valve 400 is opened.
- the width of the first linear portion 121 is gradually reduced from the radially outer side to the inner side.
- the first linear part 121 extending rightward in FIG. 1 has the most influence on the deformation of the rectifying net part 120. Therefore, for the first linear portion 121 extending right next to the second linear portion 122, the width of the portion radially outside the second linear portion 122 second from the radial inner side, It is designed so as to be wider than the width of the portion on the radially inner side from the second second linear portion 122.
- the width H 1 see FIG.
- portion 121 a radially outer than the second linear portion 122 that is radially outermost is larger than the diameter of the second linear portion 122. It is designed to be wider than the width H2 (see FIG. 4) of the portion 121b on the inner side in the direction.
- the width of the first linear portion 121 is narrowed by one step from the radially outer side to the inner side.
- a configuration in which the width of the first linear portion 121 becomes narrower by two or more steps from the radially outer side to the inner side can also be adopted.
- Occurrence of abnormal noise can be suppressed by rectifying the air flow that flows when the throttle valve 400 is opened by the rectifying net unit 120 configured as described above. Note that when the throttle valve 400 is opened, the rectifying net portion 120 protrudes toward the downstream side in the air flow direction by the air flow, as shown by the dotted line in FIG. 5, near the center of the circle of the gasket portion 110. Transforms into
- Example WHEREIN As for the 1st linear part 121 extended in radial direction among the mesh-shaped linear parts, the direction 121a of radial outer side is more than the part 121b of radial inner side. Wide.
- the part 121a on the radially outer side of the first linear part 121 is in the vicinity of the part connected to the gasket part 110, there is little influence on the deformation of the rectifying net part 120 due to the air flow. Therefore, even if the width of the radially outer portion 121a is increased, the deformation of the rectifying net 120 due to the air flow is not promoted.
- part 121b inside radial direction among 1st linear parts is narrow, the influence by the flow of air can be reduced and the deformation
- Example 2 shows a second embodiment of the present invention.
- variety becomes narrow gradually toward the inner side from the radial direction outer side is shown in a 1st linear part. Since other configurations and operations are the same as those in the first embodiment, the same components are denoted by the same reference numerals and description thereof is omitted.
- FIG. 6 is a plan view of an intake noise reduction device according to Embodiment 2 of the present invention.
- FIG. 6 is a plan view of an intake noise reduction device according to Embodiment 2 of the present invention.
- FIG. 7 is a schematic cross-sectional view of the intake noise reduction device according to the second embodiment of the present invention, which is a DD cross-sectional view in FIG. 6.
- FIG. 8 is a schematic cross-sectional view of the intake noise reduction device according to the second embodiment of the present invention, and is a cross-sectional view taken along the line EE in FIG.
- the inspiratory sound reducing device 100 is also configured by an elastic body such as various rubber materials and resin elastomers as in the case of the first embodiment.
- the intake sound reduction device 100 includes an annular gasket part 110 and a rectifying net part 120.
- the rectifying net portion 120 as in the case of the first embodiment, a plurality of first linear portions 121c extending radially in the radial direction from the center of the circle of the gasket portion 110 toward the outside.
- a plurality of second linear portions 122 provided so as to extend in the circumferential direction concentrically with respect to the center of the circle.
- the width of the radially outer portion of the two locations is wider than the width of the radially inner portion.
- the first linear portion 121c is designed so that the width of the most radially outer portion is wider than the width of the most radially inner portion.
- the width of the linear portion is a width when viewed in a direction in which air flows when the throttle valve 400 is opened.
- the width of the first linear portion 121c gradually decreases from the radially outer side to the inner side.
- the width H3 (see FIG. 7) of the first linear portion 121c in the DD cross-section portion is wider than the width H4 (see FIG. 8) of the first linear portion 121c in the EE cross-section portion.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
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Abstract
Description
吸気管を構成する2つの管のうち一方の管の端面と他方の管の端面との間の隙間を封止する環状のガスケット部と、
該ガスケット部の内側に一体に設けられ、かつ網目状に設けられた線状部により構成され、空気の流れを整流することで吸気音を低減させる整流ネット部と、
を備え、吸気管内においてスロットルバルブの下流側に配置されて吸気音を低減させる弾性体製の吸気音低減装置であって、
前記整流ネット部を構成する網目状の線状部は、径方向に伸びる第1線状部と、周方向に伸びる第2線状部とから構成されており、
第1線状部のうち任意の2か所の幅を比べると、2か所のうち径方向外側の部位の幅は径方向内側の部位の幅よりも広いか同じであり、かつ最も径方向外側の部位の幅は最も径方向内側の部位の幅よりも広いことを特徴とする。
図1~図5を参照して、本発明の実施例1に係る吸気音低減装置について説明する。図1は本発明の実施例1に係る吸気音低減装置の平面図である。図2は本発明の実施例1に係る吸気音低減装置の模式的断面図であり、図1中のAA断面図である。図3は本発明の実施例1に係る吸気音低減装置の模式的断面図であり、図1中のBB断面図である。図4は本発明の実施例1に係る吸気音低減装置の模式的断面図であり、図1中のCC断面図である。図5は本発明の実施例1に係る吸気音低減装置の使用時の様子を示す模式的断面図である。なお、図5中の吸気音低減装置の断面図は、図1中のXX断面図に相当する。
本実施例に係る吸気音低減装置100は、各種ゴム材や樹脂エラストマーなどの弾性体により構成される。そして、この吸気音低減装置100は、環状のガスケット部110と、整流ネット部120とから構成される。整流ネット部120は、ガスケット部110の内側(径方向の内側)に一体に設けられる。なお、金型成形によって、ガスケット部110と整流ネット部120とを一体に備える吸気音低減装置100を成形することができる。金型成形に関する技術は公知であるので、その説明は省略する。
整流ネット部120について、より詳細に説明する。本実施例に係る整流ネット部120は、平面形状が円形のガスケット部110の内側に設けられている。そして、整流ネット部120は、ガスケット部110の円の中心から外側に向かって径方向に放射状に伸びる複数の線状部(以下、第1線状部121と称する)と、上記円の中心に対して同心円状に周方向に伸びるように設けられる複数の線状部(以下、第2線状部122と称する)とから構成される。これら複数の第1線状部121と複数の第2線状部122とによって、網目が形成される。なお、本実施例においては、隣り合う第1線状部121の間の角度がほぼ等しく設定されている。また、隣り合う第2線状部122の径方向の間隔がほぼ等しく設定されている。これにより、整流ネット部120の網目は、ガスケット部110の円の中心付近が細かく、中心から遠ざかるにつれて粗くなっている。
以上説明したように、本実施例に係る吸気音低減装置100によれば、ガスケット部110と整流ネット部120が備えられているので、密封機能を発揮するだけでなく、吸気音を低減する機能も発揮する。そして、本実施例に係る整流ネット部120は、網目状の線状部のうち径方向に伸びる第1線状部121は、径方向外側の部位121aの方が径方向内側の部位121bよりも幅が広い。従って、第1線状部121のうち径方向外側の部位121aの剛性を高めることができ、整流ネット部120全体の変形を抑制することが可能となる。なお、第1線状部121のうち径方向外側の部位121aは、ガスケット部110に繋がる部位の付近のため、そもそも空気の流れによる整流ネット部120の変形に対する影響は少ない。従って、径方向外側の部位121aの幅を広くしても、空気の流れによる整流ネット部120の変形を助長してしまうことはない。そして、第1線状部のうち径方向内側の部位121bの幅が狭いことで、空気の流れによる影響を少なくすることができ、整流ネット部120全体の変形を抑制することができる。従って、整流ネット部120の耐久性を高めることができる。また、第1線状部121の径方向内側の部位121bの幅は狭いため、空気の流れを阻害してしまうこともなく、流量が低下してしまうこともない。
図6~図8には、本発明の実施例2が示されている。上記実施例においては、第1線状部が、径方向外側から内側に向かって段階的に幅が狭くなっている場合の構成を示した。これに対して、本実施例においては、第1線状部が、径方向外側から内側に向かって徐々に幅が狭くなっている場合の構成を示す。その他の構成および作用については実施例1と同一なので、同一の構成部分については同一の符号を付して、その説明は省略する。図6は本発明の実施例2に係る吸気音低減装置の平面図である。図7は本発明の実施例2に係る吸気音低減装置の模式的断面図であり、図6中のDD断面図である。図8は本発明の実施例2に係る吸気音低減装置の模式的断面図であり、図6中のEE断面図である。
上記各実施例においては、整流ネット部120がガスケット部110の内側の略半円形の領域に設けられる場合を示したが、整流ネット部がガスケット部の内側の全領域に亘って設けられる構成を採用することもできる。この場合には、図5に示す下部側の空気の流れA2についても整流することが可能となる。ただし、スロットルバルブ400が整流ネット部に接触してしまわないように、スロットルバルブ400と整流ネット部との間隔を、スロットルバルブ400の回動軸410からバルブ本体420の先端までの長さよりも長くする必要がある。
110 ガスケット部
120 整流ネット部
121 第1線状部
121a 径方向外側の部位
121b 径方向内側の部位
121c 第1線状部
122 第2線状部
200 インテークマニホールド
300 スロットルボディ
400 スロットルバルブ
410 回動軸
420 バルブ本体
Claims (3)
- 吸気管を構成する2つの管のうち一方の管の端面と他方の管の端面との間の隙間を封止する環状のガスケット部と、
該ガスケット部の内側に一体に設けられ、かつ網目状に設けられた線状部により構成され、空気の流れを整流することで吸気音を低減させる整流ネット部と、
を備え、吸気管内においてスロットルバルブの下流側に配置されて吸気音を低減させる弾性体製の吸気音低減装置であって、
前記整流ネット部を構成する網目状の線状部は、径方向に伸びる第1線状部と、周方向に伸びる第2線状部とから構成されており、
第1線状部のうち任意の2か所の幅を比べると、2か所のうち径方向外側の部位の幅は径方向内側の部位の幅よりも広いか同じであり、かつ最も径方向外側の部位の幅は最も径方向内側の部位の幅よりも広いことを特徴とする吸気音低減装置。 - 第1線状部は、径方向外側から内側に向かって段階的に幅が狭くなっていることを特徴とする請求項1に記載の吸気音低減装置。
- 第1線状部は、径方向外側から内側に向かって徐々に幅が狭くなっていることを特徴とする請求項1に記載の吸気音低減装置。
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EP15859491.1A EP3219973B1 (en) | 2014-11-14 | 2015-11-02 | Intake noise reduction device |
JP2016558983A JP6123953B2 (ja) | 2014-11-14 | 2015-11-02 | 吸気音低減装置 |
CN201580059670.3A CN107076068B (zh) | 2014-11-14 | 2015-11-02 | 吸气音降低装置 |
US15/524,622 US10267274B2 (en) | 2014-11-14 | 2015-11-02 | Intake noise reduction device |
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US (1) | US10267274B2 (ja) |
EP (1) | EP3219973B1 (ja) |
JP (1) | JP6123953B2 (ja) |
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EP3219973B1 (en) * | 2014-11-14 | 2019-01-09 | Nok Corporation | Intake noise reduction device |
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- 2015-11-02 EP EP15859491.1A patent/EP3219973B1/en not_active Not-in-force
- 2015-11-02 CN CN201580059670.3A patent/CN107076068B/zh not_active Expired - Fee Related
- 2015-11-02 JP JP2016558983A patent/JP6123953B2/ja not_active Expired - Fee Related
- 2015-11-02 WO PCT/JP2015/080875 patent/WO2016076150A1/ja active Application Filing
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EP3219973B1 (en) | 2019-01-09 |
US20170356407A1 (en) | 2017-12-14 |
JPWO2016076150A1 (ja) | 2017-04-27 |
US10267274B2 (en) | 2019-04-23 |
JP6123953B2 (ja) | 2017-05-10 |
CN107076068B (zh) | 2018-08-14 |
EP3219973A4 (en) | 2018-04-25 |
CN107076068A (zh) | 2017-08-18 |
EP3219973A1 (en) | 2017-09-20 |
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