JP4535005B2 - Intake device - Google Patents

Intake device Download PDF

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JP4535005B2
JP4535005B2 JP2006061327A JP2006061327A JP4535005B2 JP 4535005 B2 JP4535005 B2 JP 4535005B2 JP 2006061327 A JP2006061327 A JP 2006061327A JP 2006061327 A JP2006061327 A JP 2006061327A JP 4535005 B2 JP4535005 B2 JP 4535005B2
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intake device
window
curved
intake
tube portion
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JP2007239546A (en
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等 木野
裕 岩尾
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Toyoda Gosei Co Ltd
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Toyoda Gosei Co Ltd
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Description

本発明は、自動車用の吸気ダクトやエアクリーナホースなどの吸気装置に関する。   The present invention relates to an intake device such as an intake duct or an air cleaner hose for an automobile.

吸気ダクトやエアクリーナホースなどの吸気装置は、筒状をなし内部に吸気流路を形成する本体部を持つ。吸気装置の本体部は一般には非孔質である。充分な吸気圧を確保するためである。近年、吸気騒音を低減する目的で、本体部の周壁に内外を連通する窓部を形成し、この窓部を多孔質部材で覆う技術が提案されている(例えば、特許文献1参照)。この種の吸気装置では、吸気圧(負圧)により、窓部および多孔質部材を通じて吸気流路に空気が流入する。このため、吸気装置の形状によっては、窓部よりも吸気流路の下流側では圧力損失が増大し、吸気装置よりも吸気流路の下流側に供給できる空気の量が少なくなる場合があった。
特開2000−282981号公報
An intake device such as an intake duct or an air cleaner hose has a main body that forms a cylindrical shape and forms an intake passage. The main body of the intake device is generally non-porous. This is to ensure sufficient intake pressure. In recent years, for the purpose of reducing intake noise, a technique has been proposed in which a window portion communicating with the inside and the outside is formed on the peripheral wall of the main body portion, and the window portion is covered with a porous member (for example, see Patent Document 1). In this type of intake device, air flows into the intake passage through the window and the porous member due to the intake pressure (negative pressure). For this reason, depending on the shape of the intake device, pressure loss may increase on the downstream side of the intake flow path from the window, and the amount of air that can be supplied downstream of the intake flow path may be less than that of the intake device. .
JP 2000-282811 A

本発明は上記事情に鑑みて成されたものであり、窓部および多孔質部材を持ち、圧力損失の増大を抑制できる吸気装置を提供することを目的とする。   The present invention has been made in view of the above circumstances, and an object thereof is to provide an intake device that has a window portion and a porous member and can suppress an increase in pressure loss.

上記課題を解決する本発明の吸気装置は、筒状をなし内部が吸気流路を形成する非孔質の本体部と、本体部の周壁に形成され内外を連通する窓部と、窓部を覆う多孔質部材と、を持つ吸気装置であって、本体部は真っ直ぐに延びる直筒部と、直筒部に連絡し湾曲して延びる湾曲筒部と、を持ち、直筒部は、湾曲筒部の吸気流路上流側に連絡する上流直筒部と、湾曲筒部の吸気流路下流側に連絡する下流直筒部とを持ち、窓部は下流直筒部にのみ形成され、湾曲筒部の周壁は、湾曲筒部の延び方向についての曲率が最大となる最大曲率点をとおり延び方向に沿って延びる第1の線と、曲率が最小となる最小曲率点をとおり湾曲筒部の延び方向に沿って延びる第2の線と、を含み、湾曲筒部と下流直筒部との境界部分の径方向断面は、第1の線との交点である第1の点と、第2の線との交点である第2の点と、を周上に持ち、窓部は、第1の点と第2の点とをとおり下流直筒部の軸線に平行な第1平面と、下流直筒部の周壁と、の交線を避け、かつ、第1平面に直交し下流直筒部の軸線を含む第2平面と、下流直筒部の周壁と、の交線の少なくとも一部を含む位置に配され、下流直筒部における窓部の周方向長さは、下流直筒部の周方向長さの1/4以下であることを特徴とする An intake device of the present invention that solves the above problems includes a non-porous main body portion that has a cylindrical shape and the inside forms an intake flow path, a window portion that is formed on the peripheral wall of the main body portion and communicates with the inside and outside, An air intake device having a porous member for covering, wherein the main body has a straight cylindrical portion extending straight and a curved cylindrical portion extending in communication with the straight cylindrical portion, and the straight cylindrical portion is a curved cylindrical portion It has an upstream straight cylinder part that communicates with the upstream side of the intake flow path, and a downstream straight cylinder part that communicates with the downstream side of the intake flow path of the curved cylinder part , the window part is formed only on the downstream straight cylinder part, and the peripheral wall of the curved cylinder part is A first line extending along the extending direction through the maximum curvature point at which the curvature in the extending direction of the curved cylindrical portion is maximized, and an extending direction along the extending direction of the curved cylindrical portion through the minimum curvature point at which the curvature is minimized. And a radial cross section of the boundary portion between the curved tube portion and the downstream straight tube portion includes the first line. A first point which is the intersection, and the second point is an intersection of the second line, has a circumferential on the window unit, as a downstream straight cylindrical portion first point and a second point A second plane that avoids the intersection of the first plane parallel to the axis and the peripheral wall of the downstream straight cylinder part , and that is orthogonal to the first plane and includes the axis of the downstream straight cylinder part, and the peripheral wall of the downstream straight cylinder part, The circumferential length of the window portion in the downstream straight tube portion is ¼ or less of the circumferential length of the downstream straight tube portion.

本発明の吸気装置において、上記多孔質部材は、上記吸気装置の外面に露出していることが好ましい。In the intake device of the present invention, it is preferable that the porous member is exposed on an outer surface of the intake device.

上述したように、窓部および多孔質部材を持つ吸気装置は、その形状によっては、圧力損失が大きくなる場合がある。この現象は、特に、吸気装置が湾曲して延びる部分(湾曲筒部)を持つ場合に顕著である。これは、以下の理由によると考えられる。   As described above, an air intake device having a window portion and a porous member may have a large pressure loss depending on its shape. This phenomenon is particularly noticeable when the intake device has a curved portion (curved tube portion). This is considered to be due to the following reason.

一般的な吸気装置を吸気流路に沿って切断した様子を模式的に表す断面図を図1に示す。図1に示す吸気装置を図1中A−A’位置で切断した様子を模式的に表す断面図を図2に示す。図1に示す吸気装置を図1中B−B’位置で切断した様子を模式的に表す断面図を図3に示す。図1に示す吸気装置を図1中C−C’位置で切断した様子を模式的に表す断面図を図4に示す。図1に示すように、湾曲筒部11を持つ吸気装置の吸気系路には、流速が非常に大きい領域Xと、乱流が生じて流速が非常に小さくなる領域Yとが生じる。図1に示すように、湾曲筒部11のなかで曲率が大きい領域Zでは、吸気の流速が非常に大きくなる。したがって、湾曲筒部11に窓部を形成すると、吸気流路に流入する空気の量が増大し、圧力損失が増大する。また、曲率が大きい領域Zに隣接した吸気流路の下流側の領域Yでは、乱流が発生し、吸気の流速が非常に小さくなる。上述したように、湾曲筒部11に窓部を形成すると吸気流路に流入する空気の量が増大するため、乱流が攪拌されて増大する。したがって、乱流によって吸気の流れが大きく阻害され、圧力損失が増大する。   FIG. 1 is a cross-sectional view schematically showing a state in which a general intake device is cut along an intake passage. FIG. 2 is a sectional view schematically showing a state where the intake device shown in FIG. 1 is cut at the position A-A ′ in FIG. 1. FIG. 3 is a cross-sectional view schematically showing a state where the intake device shown in FIG. 1 is cut at the position B-B ′ in FIG. 1. FIG. 4 is a cross-sectional view schematically showing a state where the intake device shown in FIG. 1 is cut at the position C-C ′ in FIG. 1. As shown in FIG. 1, in the intake system path of the intake device having the curved cylinder portion 11, a region X where the flow velocity is very large and a region Y where the turbulent flow is generated and the flow velocity becomes very small are generated. As shown in FIG. 1, in the region Z where the curvature is large in the curved cylindrical portion 11, the flow rate of the intake air becomes very large. Therefore, when a window part is formed in the curved cylinder part 11, the amount of air flowing into the intake passage increases, and the pressure loss increases. Further, in the region Y on the downstream side of the intake passage adjacent to the region Z having a large curvature, turbulent flow is generated and the flow velocity of the intake air becomes very small. As described above, when the window portion is formed in the curved cylinder portion 11, the amount of air flowing into the intake passage increases, so that the turbulent flow is stirred and increased. Therefore, the flow of the intake air is greatly hindered by the turbulent flow, and the pressure loss increases.

本発明の吸気装置は、窓部を直筒部10に形成することで、圧力損失の増大を抑制できる。直筒部10、すなわち、吸気の流速が非常に大きくなる湾曲筒部11を避けた部分に窓部を形成することで、多孔質部材を通じて窓部から吸気流路に流入する空気の量を低減できる。また、直筒部10に窓部を形成することで、上述した乱流の攪拌を抑制できる。   The intake device of the present invention can suppress an increase in pressure loss by forming the window portion in the straight tube portion 10. By forming the window part in the straight cylinder part 10, that is, the part avoiding the curved cylinder part 11 where the flow velocity of the intake air becomes very large, the amount of air flowing from the window part to the intake passage through the porous member can be reduced. . Further, by forming the window portion in the straight tube portion 10, the above-described turbulent stirring can be suppressed.

さらに、図2〜図4に示すように、流速が非常に大きい領域Xは、湾曲筒部11の前後で径方向に位置ズレする。このため、本発明の吸気装置では、領域Xが形成され易い部分を避けた位置に窓部を配し、窓部が領域Xの影響を受け難いようにした。領域Xが形成され易い部分とは、後述する第1平面と直筒部10の周壁とが交わる部分(図1におけるL1、L2)である。   Furthermore, as shown in FIGS. 2 to 4, the region X where the flow velocity is very large is displaced in the radial direction before and after the curved cylindrical portion 11. For this reason, in the intake device of the present invention, the window portion is arranged at a position avoiding the portion where the region X is easily formed, so that the window portion is not easily affected by the region X. The portion where the region X is easily formed is a portion (L1 and L2 in FIG. 1) where a first plane described later and the peripheral wall of the straight tube portion 10 intersect.

本発明の吸気装置によると、これらの協働によって、圧力損失の増大を抑制できる。   According to the intake device of the present invention, an increase in pressure loss can be suppressed by these cooperation.

本発明の吸気装置において、本体部は筒状をなす。本体部の径方向断面は、例えば、円形であっても良いし矩形であっても良い。本体部は非孔質であり、樹脂等の既知の材料で形成できる。本体部は直筒部と湾曲筒部とを持つ。直筒部と湾曲筒部とはそれぞれ1つずつであっても良いし、複数であっても良い。直筒部と湾曲筒部とは、一体に形成しても良いし、別体で成形し組み立てて一体化しても良い。湾曲筒部は、軸線の曲率が一定であっても良いし、一定でなくても良い。   In the intake device of the present invention, the main body has a cylindrical shape. The radial cross section of the main body may be, for example, circular or rectangular. The main body is non-porous and can be formed of a known material such as a resin. The main body has a straight tube portion and a curved tube portion. One straight tube portion and one curved tube portion may be provided, or a plurality of straight tube portions and a plurality of curved tube portions may be provided. The straight tube portion and the curved tube portion may be formed integrally, or may be formed separately and assembled and integrated. The curved cylindrical portion may have a constant curvature of the axis or may not be constant.

直筒部には窓部が形成されている。窓部の開口面積や形状は特に問わない。なお、窓部の開口面積が小さいほど圧力損失の増大を抑制でき、窓部の開口面積が大きいほど吸気騒音を低減できる。また、窓部を覆う多孔質部材としては、発泡樹脂、織布、不織布等の既知のものを使用できる。   A window portion is formed in the straight tube portion. The opening area and shape of the window are not particularly limited. Note that an increase in pressure loss can be suppressed as the opening area of the window portion is smaller, and intake noise can be reduced as the opening area of the window portion is larger. Moreover, as a porous member which covers a window part, well-known things, such as foamed resin, a woven fabric, and a nonwoven fabric, can be used.

本体部が複数の湾曲筒部を持つ場合には、ある特定の湾曲筒部に対して吸気流路の上流側に連絡する直筒部が上流直筒部となり、吸気流路の下流側に連絡する直筒部が下流直筒部となる。例えば、直筒部と湾曲筒部とが、吸気流路の下流側に向けて、第1の直筒部→第1の湾曲筒部→第2の直筒部→第2の湾曲筒部→第3の直筒部の順に配置されている場合には、第1の湾曲筒部に対する上流直筒部は第1の直筒部であり、第1の湾曲筒部に対する下流直筒部は第2の直筒部である。第2の湾曲筒部に対する上流直筒部は第2の直筒部であり、第2の湾曲筒部に対する下流直筒部は第3の直筒部である。したがって、この場合には、窓部は第1の直筒部、第2の直筒部、第3の直筒部の何れかに形成すれば良い。なお、窓部は下流直筒部に形成するのが好ましいため、この場合には、第3の直筒部または第2の直筒部に窓部を形成するのが好ましい。なお、複数の窓部を形成する場合には、何れか1つの直筒部のみに複数の窓部を形成しても良いし、2以上の直筒部に1つずつの窓部を形成しても良い。   When the main body has a plurality of curved cylinder parts, the straight cylinder part that communicates with the upstream side of the intake flow path with respect to a specific curved cylinder part becomes the upstream straight cylinder part, and the straight cylinder that communicates with the downstream side of the intake flow path The part becomes the downstream straight cylinder part. For example, the straight tube portion and the curved tube portion are arranged so that the first straight tube portion → the first curved tube portion → the second straight tube portion → the second curved tube portion → the third tube toward the downstream side of the intake passage. When arranged in the order of the straight tube portion, the upstream straight tube portion with respect to the first curved tube portion is the first straight tube portion, and the downstream straight tube portion with respect to the first curved tube portion is the second straight tube portion. The upstream straight tube portion with respect to the second curved tube portion is the second straight tube portion, and the downstream straight tube portion with respect to the second curved tube portion is the third straight tube portion. Therefore, in this case, the window portion may be formed in any one of the first straight tube portion, the second straight tube portion, and the third straight tube portion. In addition, since it is preferable to form a window part in a downstream straight cylinder part, in this case, it is preferable to form a window part in a 3rd straight cylinder part or a 2nd straight cylinder part. In the case of forming a plurality of window portions, a plurality of window portions may be formed only in any one straight tube portion, or one window portion may be formed in two or more straight tube portions. good.

本発明の吸気装置において、窓部は、直筒部の特定の位置に形成される。湾曲筒部は筒状をなし湾曲して延びるため、湾曲筒部の曲率は湾曲筒部上の各点において異なる。本発明の吸気装置の一例を模式的に表す斜視図を図5に示す。図5に示すように、湾曲筒部11と直筒部10との境界部分における径方向断面Sには、湾曲筒部11の曲率が最大になる点P1と最小になる点P2とが存在する。   In the intake device of the present invention, the window portion is formed at a specific position of the straight tube portion. Since the curved cylinder part is cylindrical and extends while being curved, the curvature of the curved cylinder part differs at each point on the curved cylinder part. FIG. 5 is a perspective view schematically showing an example of the intake device of the present invention. As shown in FIG. 5, the radial cross section S at the boundary portion between the curved tube portion 11 and the straight tube portion 10 has a point P1 at which the curvature of the curved tube portion 11 is maximized and a point P2 at which it is minimized.

本発明の吸気装置では、点P1と点P2とをとおり直筒部10の軸線L0に平行な第1平面F1と、直筒部10の周壁と、が交わる部分(L1、L2)を避けた位置に窓部を形成する。直線L1およびL2を避けた位置に窓部を形成すれば、上述したように、窓部の位置を、流速が非常に大きい領域の影響を受け難い位置にできる。このため、圧力損失の増大を抑制できる。   In the intake device of the present invention, the position (L1, L2) where the first plane F1 parallel to the axis L0 of the straight tube portion 10 and the peripheral wall of the straight tube portion 10 intersect with each other through the points P1 and P2 is avoided. Form a window. If the window portion is formed at a position that avoids the straight lines L1 and L2, as described above, the position of the window portion can be made a position that is not easily affected by the region where the flow velocity is very large. For this reason, an increase in pressure loss can be suppressed.

また、図6に示すように、湾曲筒部11の軸線(図略)が3次元的に湾曲している場合にも同様に、窓部は、点P1と点P2とをとおり直筒部10の軸線L0に平行な第1平面F1と、直筒部10の周壁と、が交わる部分(L1、L2)を避けた位置に形成すればよい。   In addition, as shown in FIG. 6, similarly, when the axis (not shown) of the curved cylinder portion 11 is three-dimensionally curved, the window portion passes through the points P <b> 1 and P <b> 2 and the straight cylindrical portion 10. What is necessary is just to form in the position which avoided the part (L1, L2) where the 1st plane F1 parallel to the axis line L0 and the surrounding wall of the straight cylinder part 10 cross.

以下、本発明の吸気装置を図面を基に説明する。   Hereinafter, an intake device of the present invention will be described with reference to the drawings.

(実施例1)
実施例1の吸気装置を模式的に表す側面図を図7に示す。
Example 1
FIG. 7 is a side view schematically showing the intake device of the first embodiment .

実施例1の吸気装置は、本体部1と、窓部2と、多孔質部材3と、を持つ。本体部1はPP(ポリプロピレン)製であり、非孔質である。本体部1は筒状をなす。本体部1は、1つの湾曲筒部11と2つの直筒部10(上流直筒部10a、下流直筒部10b)とをもつ。上流直筒部10aは湾曲筒部11の吸気流路上流側に連絡し、下流直筒部10bは湾曲筒部11の吸気流路下流側に連絡している。上流直筒部10aと下流直筒部10bとは直交する方向に延び、同じ平面に接する。本体部1の軸線の長さは600mmである。上流直筒部10aの軸方向長さは250mmであり、下流直筒部10bの軸方向長さは250mmである。湾曲筒部11の軸線の曲率半径は65mmである。本体部1の肉厚は3mmであり、内径(直径)は56mmである。   The intake device according to the first embodiment includes a main body portion 1, a window portion 2, and a porous member 3. The main body 1 is made of PP (polypropylene) and is nonporous. The main body 1 has a cylindrical shape. The main body 1 has one curved tube portion 11 and two straight tube portions 10 (upstream straight tube portion 10a and downstream straight tube portion 10b). The upstream straight cylinder part 10 a communicates with the intake channel upstream side of the curved cylinder part 11, and the downstream straight cylinder part 10 b communicates with the intake channel downstream side of the curved cylinder part 11. The upstream straight tube portion 10a and the downstream straight tube portion 10b extend in a direction orthogonal to each other and are in contact with the same plane. The length of the axis of the main body 1 is 600 mm. The upstream straight tube portion 10a has an axial length of 250 mm, and the downstream straight tube portion 10b has an axial length of 250 mm. The curvature radius of the axis of the curved cylindrical portion 11 is 65 mm. The thickness of the main body 1 is 3 mm, and the inner diameter (diameter) is 56 mm.

実施例1の吸気装置は、1つの窓部2を持つ。窓部2は下流直筒部10bに形成されている。湾曲筒部11と下流直筒部10bとの境界部分の径方向断面には、湾曲筒部11の曲率が最大になる点P1と湾曲筒部11の曲率が最小になる点P2とが存在する。実施例1の吸気装置において、窓部2は、第1平面と下流直筒部10bの周壁とが交わる部分(L1、L2)を避け、かつ、第2平面と下流直筒部10bの周壁とが交わる部分(L3)を含む位置に形成されている。第1平面は、点P1および点P2をとおり下流直筒部10bの軸線L0に平行な平面である。第2平面は、第1平面に直交し下流直筒部10bの軸線L0を含む平面である。下流直筒部10bにおける窓部2の周方向長さは、下流直筒部10bの周方向長さの1/4である。窓部2は多孔質部材3で覆われている。多孔質部材3はPET(ポリエチレンテレフタレート)製の不織布からなる。   The intake device of the first embodiment has one window portion 2. The window part 2 is formed in the downstream straight cylinder part 10b. In the radial cross section of the boundary portion between the curved cylindrical portion 11 and the downstream straight cylindrical portion 10b, there are a point P1 at which the curvature of the curved cylindrical portion 11 is maximized and a point P2 at which the curvature of the curved cylindrical portion 11 is minimized. In the intake device of the first embodiment, the window portion 2 avoids portions (L1, L2) where the first plane and the peripheral wall of the downstream straight cylinder portion 10b intersect, and the second plane and the peripheral wall of the downstream straight cylinder portion 10b intersect. It is formed at a position including the portion (L3). The first plane is a plane that passes through the points P1 and P2 and is parallel to the axis L0 of the downstream straight cylindrical portion 10b. The second plane is a plane that is orthogonal to the first plane and includes the axis L0 of the downstream straight cylindrical portion 10b. The circumferential length of the window portion 2 in the downstream straight tube portion 10b is ¼ of the circumferential length of the downstream straight tube portion 10b. The window portion 2 is covered with a porous member 3. The porous member 3 is made of a nonwoven fabric made of PET (polyethylene terephthalate).

参考例1
参考例1の吸気装置を模式的に表す側面図を図8に示す。
( Reference Example 1 )
A side view schematically showing the intake device of Reference Example 1 is shown in FIG.

参考例1の吸気装置は、1つの窓部2と1つの多孔質部材3とを持つ。参考例1の吸気装置において、窓部2は上流直筒部10aに形成され、多孔質部材3で覆われている。湾曲筒部11と上流直筒部10aとの境界部分の径方向断面には、湾曲筒部11の曲率が最大になる点P1と湾曲筒部11の曲率が最小になる点P2とが存在する。参考例1の吸気装置において、窓部は、第1平面と上流直筒部10aの周壁とが交わる部分(L1、L2)を避け、かつ、第2平面と上流直筒部10aの周壁とが交わる部分(L3)を含む位置に形成されている。第1平面は、点P1および点P2をとおり上流直筒部10aの軸線L0に平行な平面である。第2平面は、第1平面に直交し上流直筒部10aの軸線L0を含む平面である。参考例1の吸気装置における窓部2は、実施例1の吸気装置における窓部2と同形状である。参考例1の吸気装置は、窓部2および多孔質部材3の配置位置以外は実施例1と同じである。 The intake device of Reference Example 1 has one window portion 2 and one porous member 3. In the intake device of Reference Example 1 , the window portion 2 is formed in the upstream straight tube portion 10 a and is covered with the porous member 3. In the radial cross section of the boundary portion between the curved cylindrical portion 11 and the upstream straight cylindrical portion 10a, there are a point P1 at which the curvature of the curved cylindrical portion 11 is maximized and a point P2 at which the curvature of the curved cylindrical portion 11 is minimized. In the intake device of Reference Example 1 , the window portion avoids portions (L1, L2) where the first plane and the peripheral wall of the upstream straight cylinder portion 10a intersect, and the portion where the second plane and the peripheral wall of the upstream straight cylinder portion 10a intersect. It is formed at a position including (L3). The first plane is a plane that passes through the points P1 and P2 and is parallel to the axis L0 of the upstream straight tube portion 10a. The second plane is a plane that is orthogonal to the first plane and includes the axis L0 of the upstream straight tube portion 10a. The window 2 in the intake device of Reference Example 1 has the same shape as the window 2 in the intake device of Example 1. The intake device of Reference Example 1 is the same as that of Example 1 except for the arrangement positions of the window portion 2 and the porous member 3.

参考例2
参考例2の吸気装置を模式的に表す側面図を図9に示す。
( Reference Example 2 )
A side view schematically showing the intake device of Reference Example 2 is shown in FIG.

参考例2の吸気装置は、2つの窓部2と2つの多孔質部材3とを持つ。参考例2の吸気装置において、窓部2は、下流直筒部10bと上流直筒部10aとにそれぞれ1つずつ形成されている。各々の窓部2は多孔質部材3で覆われている。下流直筒部10bに形成されている窓部2は、実施例1の吸気装置における窓部2と同形状かつ同位置に形成されている。上流直筒部10aに形成されている窓部2は、参考例1の吸気装置における窓部2と同形状かつ同位置に形成されている。 The intake device of Reference Example 2 has two window portions 2 and two porous members 3. In the intake device of Reference Example 2 , one window portion 2 is formed in each of the downstream straight cylinder portion 10b and the upstream straight cylinder portion 10a. Each window 2 is covered with a porous member 3. The window part 2 formed in the downstream straight cylinder part 10b is formed in the same shape and the same position as the window part 2 in the intake device of the first embodiment. The window part 2 formed in the upstream straight cylinder part 10a is formed in the same shape and the same position as the window part 2 in the intake device of the reference example 1 .

(比較例1)
比較例1の吸気装置は、窓部が湾曲筒部に形成されていること以外は、実施例1の吸気装置と同じである。比較例1の吸気装置を模式的に表す側面図を図10に示す。
(Comparative Example 1)
The intake device of Comparative Example 1 is the same as the intake device of Example 1 except that the window portion is formed in the curved cylinder portion. FIG. 10 is a side view schematically showing the intake device of the first comparative example.

比較例1の吸気装置は、1つの窓部2と1つの多孔質部材3とを持つ。比較例1の吸気装置において、窓部2は湾曲筒部11に形成されている。比較例1の吸気装置における窓部2は、実施例1の吸気装置における窓部2と平行に形成されている。比較例1の吸気装置における窓部2の開口面積は、実施例1の吸気装置における窓部2の開口面積と同じである。   The intake device of Comparative Example 1 has one window portion 2 and one porous member 3. In the intake device of Comparative Example 1, the window portion 2 is formed in the curved cylinder portion 11. The window portion 2 in the intake device of the comparative example 1 is formed in parallel with the window portion 2 in the intake device of the first embodiment. The opening area of the window portion 2 in the intake device of the comparative example 1 is the same as the opening area of the window portion 2 in the intake device of the first embodiment.

(比較例2)
比較例2の吸気装置は、窓部が湾曲筒部と上流直筒部と下流直筒部とにそれぞれ形成されていること以外は実施例1の吸気装置と同じである。比較例2の吸気装置を模式的に表す側面図を図11に示す。
(Comparative Example 2)
The intake device of Comparative Example 2 is the same as the intake device of Example 1 except that the window portions are formed in the curved tube portion, the upstream straight tube portion, and the downstream straight tube portion, respectively. FIG. 11 is a side view schematically showing the intake device of Comparative Example 2.

比較例2の吸気装置は、3つの窓部2と3つの多孔質部材3とを持つ。比較例2の吸気装置において、窓部2は、下流直筒部10bと湾曲筒部11と上流直筒部10aとにそれぞれ1つずつ形成されている。各々の窓部2は多孔質部材3で覆われている。下流直筒部10bに形成されている窓部2は、実施例1の吸気装置における窓部2と同形状かつ同位置に形成されている。湾曲筒部11に形成されている窓部2は比較例1の吸気装置における窓部2と同形状かつ同位置に形成されている。上流直筒部10aに形成されている窓部2は、参考例1の吸気装置における窓部2と同形状かつ同位置に形成されている。 The intake device of Comparative Example 2 has three window portions 2 and three porous members 3. In the intake device of Comparative Example 2, one window portion 2 is formed in each of the downstream straight tube portion 10b, the curved tube portion 11 and the upstream straight tube portion 10a. Each window 2 is covered with a porous member 3. The window part 2 formed in the downstream straight cylinder part 10b is formed in the same shape and the same position as the window part 2 in the intake device of the first embodiment. The window part 2 formed in the curved cylinder part 11 is formed in the same shape and the same position as the window part 2 in the intake device of the comparative example 1. The window part 2 formed in the upstream straight cylinder part 10a is formed in the same shape and the same position as the window part 2 in the intake device of the reference example 1 .

(比較例3)
比較例3の吸気装置は、窓部が湾曲筒部と上流直筒部と下流直筒部とにそれぞれ形成されていること以外は実施例1の吸気装置と同じである。比較例3の吸気装置を模式的に表す側面図を図12に示す。
(Comparative Example 3)
The intake device of Comparative Example 3 is the same as the intake device of Example 1 except that the window portions are formed in the curved tube portion, the upstream straight tube portion, and the downstream straight tube portion, respectively. FIG. 12 is a side view schematically showing the intake device of the third comparative example.

比較例3の吸気装置は、3つの窓部2と3つの多孔質部材3とを持つ。比較例3の吸気装置において、窓部2は、下流直筒部10bと湾曲筒部11と上流直筒部10aとにそれぞれ1つずつ形成されている。各々の窓部2は多孔質部材3で覆われている。下流直筒部10bに形成されている窓部2は、第1平面と下流直筒部10bの周壁とが交わる部分の一方(L2)を含む位置に形成されている。湾曲筒部11に形成されている窓部2は比較例1の吸気装置における窓部2と同形状かつ同位置に形成されている。上流直筒部10aに形成されている窓部2は、参考例1の吸気装置における窓部2と同形状かつ同位置に形成されている。 The intake device of Comparative Example 3 has three window portions 2 and three porous members 3. In the intake device of Comparative Example 3, one window portion 2 is formed in each of the downstream straight tube portion 10b, the curved tube portion 11 and the upstream straight tube portion 10a. Each window 2 is covered with a porous member 3. The window part 2 formed in the downstream straight cylinder part 10b is formed at a position including one (L2) of the part where the first plane and the peripheral wall of the downstream straight cylinder part 10b intersect. The window part 2 formed in the curved cylinder part 11 is formed in the same shape and the same position as the window part 2 in the intake device of the comparative example 1. The window part 2 formed in the upstream straight cylinder part 10a is formed in the same shape and the same position as the window part 2 in the intake device of the reference example 1 .

(比較例4)
比較例4の吸気装置は、窓部および多孔質部材を持たないこと以外は実施例1の吸気装置と同じである。
(Comparative Example 4)
The intake device of Comparative Example 4 is the same as the intake device of Example 1 except that it does not have a window portion and a porous member.

(圧力損失測定試験)
実施例1、参考例1、2および比較例1〜4の吸気装置を用い、各吸気装置による圧力損失(以下、単に圧力損失と略する)を測定した。詳しくは、各吸気装置に3段階の流量(2m3/分、4m3/分、6m3/分)で空気を供給し、吸気装置よりも吸気流路上流側における吸気圧(Pa)と、吸気装置よりも吸気流路下流側における吸気圧(Pa)と、を測定した。そして、2つの吸気圧の差を算出し、各吸気装置による圧力損失(Pa)とした。圧側損失測定試験の結果を表すグラフを図13に示す。
(Pressure loss measurement test)
Using the intake devices of Example 1 , Reference Examples 1 and 2, and Comparative Examples 1 to 4, pressure loss (hereinafter simply referred to as pressure loss) by each intake device was measured. Specifically, air is supplied to each intake device at three stages of flow rates (2 m3 / min, 4 m3 / min, and 6 m3 / min), and the intake pressure (Pa) on the upstream side of the intake flow channel from the intake device and the intake device Also, the intake pressure (Pa) on the downstream side of the intake passage was measured. The difference between the two intake pressures was calculated and used as the pressure loss (Pa) due to each intake device. A graph showing the results of the compression side loss measurement test is shown in FIG.

比較例4の吸気装置は、窓部2および多孔質部材3を持たないため、圧力損失が最も小さい。この比較例4の吸気装置による圧力損失を基準値として、実施例1、参考例1、2および比較例1〜3の吸気装置による圧力損失とを比較した。なお、図13に示すように、実施例1、参考例1、2および比較例1〜3の吸気装置による圧力損失と基準値との差は、吸気装置に供給する空気の流量(m3/分)が大きくなるほど増大する。したがって、吸気装置に6m3/分で空気を供給したときの各吸気装置による圧力損失を比較すれば、実施例1、参考例1、2および比較例1〜3の吸気装置による圧力損失が、基準値に比べてどの程度増大しているかがわかる。以下、吸気装置に6m3/分で空気を供給したときの各吸気装置による圧力損失を、単に圧力損失と略する。 Since the intake device of Comparative Example 4 does not have the window portion 2 and the porous member 3, the pressure loss is the smallest. Using the pressure loss due to the intake device of Comparative Example 4 as a reference value, the pressure loss due to the intake devices of Example 1 , Reference Examples 1 and 2 and Comparative Examples 1 to 3 was compared. As shown in FIG. 13, the difference between the pressure loss and the reference value by the intake devices of Example 1 , Reference Examples 1 and 2 and Comparative Examples 1 to 3 is the flow rate of air supplied to the intake device (m3 / min). ) Increases as the value increases. Accordingly, if the pressure loss due to each intake device when air is supplied to the intake device at 6 m 3 / min, the pressure loss due to the intake devices of Example 1 , Reference Examples 1 and 2 and Comparative Examples 1 to 3 is the reference. You can see how much it increases compared to the value. Hereinafter, the pressure loss caused by each intake device when air is supplied to the intake device at 6 m 3 / min is simply abbreviated as pressure loss.

基準値を100%としたときの実施例1の吸気装置による圧力損失は約102%である。基準値を100%としたときの参考例1の吸気装置による圧力損失は約106%である。基準値を100%としたときの参考例2の吸気装置による圧力損失は約107%である。基準値を100%としたときの比較例1の吸気装置による圧力損失は約117%である。基準値を100%としたときの比較例2の吸気装置による圧力損失は約115%である。基準値を100%としたときの比較例3の吸気装置による圧力損失は約125%である。 When the reference value is 100%, the pressure loss due to the intake device of the first embodiment is about 102%. When the reference value is 100%, the pressure loss due to the intake device of Reference Example 1 is about 106%. When the reference value is 100%, the pressure loss due to the intake device of Reference Example 2 is about 107%. When the reference value is 100%, the pressure loss due to the intake device of Comparative Example 1 is about 117%. When the reference value is 100%, the pressure loss due to the intake device of Comparative Example 2 is about 115%. When the reference value is 100%, the pressure loss by the intake device of Comparative Example 3 is about 125%.

実施例1の吸気装置による圧力損失は基準値よりも約2%増大しているのみであり、参考例1の吸気装置による圧力損失は基準値よりも約6%増大しているのみである。これに対して、比較例1の吸気装置による圧力損失は基準値よりも約17%増大している。実施例1、参考例1の吸気装置および比較例1の吸気装置は、窓部2の数が同じであり、窓部2の形成位置が異なるのみである(実施例1では下流直筒部10b、参考例1では上流直筒部10a、比較例1では湾曲筒部11)。したがって、この結果から、窓部2を直筒部10に形成する場合には、窓部2を湾曲筒部11に形成する場合に比べて、圧力損失の増大を抑制できることがわかる。すなわち、本発明の吸気装置によると、窓部2および多孔質部材3を設けるにもかかわらず、圧力損失の増大を抑制できることがわかる。 The pressure loss due to the intake device of Example 1 is only increased by about 2% from the reference value, and the pressure loss by the intake device of Reference Example 1 is only increased by about 6% from the reference value. On the other hand, the pressure loss due to the intake device of Comparative Example 1 is increased by about 17% from the reference value. The intake device of Example 1 and Reference Example 1 and the intake device of Comparative Example 1 have the same number of window portions 2 and differ only in the formation positions of the window portions 2 (in Embodiment 1, the downstream straight cylinder portion 10b, In the reference example 1 , the upstream straight cylinder part 10a, and in the comparative example 1, the curved cylinder part 11). Therefore, it can be seen from this result that an increase in pressure loss can be suppressed when the window portion 2 is formed in the straight tube portion 10 as compared with a case where the window portion 2 is formed in the curved tube portion 11. That is, according to the intake device of the present invention, it is understood that an increase in pressure loss can be suppressed despite the provision of the window portion 2 and the porous member 3.

また、比較例2の吸気装置による圧力損失は基準値よりも約15%増大している。これに対して、比較例3の吸気装置による圧力損失は基準値よりも約25%増大している。比較例2の吸気装置と比較例3の吸気装置とは、下流筒部における窓部2の配置位置が異なるのみである。すなわち、比較例2の吸気装置では、L1部分およびL2部分を避けた位置に窓部2を形成しているのに対して、比較例3の吸気装置では、L2部分を含む位置に窓部2を形成している。この結果から、L1部分およびL2部分を避けた位置に窓部2を形成している本発明の吸気装置は、圧力損失の増大を抑制できることがわかる。   Further, the pressure loss due to the intake device of Comparative Example 2 is increased by about 15% from the reference value. On the other hand, the pressure loss by the intake device of Comparative Example 3 is increased by about 25% from the reference value. The intake device of the comparative example 2 and the intake device of the comparative example 3 differ only in the arrangement position of the window part 2 in the downstream cylinder part. That is, in the intake device of Comparative Example 2, the window portion 2 is formed at a position avoiding the L1 portion and the L2 portion, whereas in the intake device of Comparative Example 3, the window portion 2 is located at a position including the L2 portion. Is forming. From this result, it can be seen that the intake device of the present invention in which the window portion 2 is formed at a position avoiding the L1 portion and the L2 portion can suppress an increase in pressure loss.

さらに、実施例1の吸気装置による圧力損失は基準値とほぼ同等であり、参考例1の吸気装置による圧力損失よりも小さい。この結果から、窓部2を直筒部10に形成した吸気装置、すなわち、本発明の吸気装置においては、窓部2を下流直筒部10bに形成する場合に、圧力損失の増大をより一層抑制できることがわかる。 Further, the pressure loss due to the intake device of the first embodiment is almost equal to the reference value, and is smaller than the pressure loss due to the intake device of the first reference example . From this result, in the intake device in which the window portion 2 is formed in the straight cylinder portion 10, that is, in the intake device of the present invention, when the window portion 2 is formed in the downstream straight cylinder portion 10b, an increase in pressure loss can be further suppressed. I understand.

また、参考例2の吸気装置による圧力損失は基準値よりも約7%増大しているのみであり、実施例1の吸気装置による圧力損失(約2%の増大)や参考例1の吸気装置による圧力損失(約6%の増大)と大差ない。よって、窓部2を下流直筒部10bと上流直筒部10aとの両方に形成する場合にも、窓部2を下流直筒部10bと上流直筒部10aとの一方に形成する場合と同様に、圧力損失の増大を抑制できることがわかる。なお、上述したように、窓部2の開口面積が大きいほど吸気騒音を低減できる。このため、参考例2の吸気装置は、実施例1および参考例1の吸気装置に比べて、吸気騒音をより一層低減できる。すなわち、本発明の吸気装置では、窓部2を下流直筒部10bと上流直筒部10aとの両方に形成するのが好ましい。 Further, the pressure loss due to the intake device of the reference example 2 is only increased by about 7% from the reference value. The pressure loss due to the intake device of the first embodiment (an increase of about 2%) and the intake device of the reference example 1 This is not much different from the pressure loss due to (an increase of about 6%). Therefore, when the window portion 2 is formed on both the downstream straight tube portion 10b and the upstream straight tube portion 10a, the pressure is the same as when the window portion 2 is formed on one of the downstream straight tube portion 10b and the upstream straight tube portion 10a. It can be seen that an increase in loss can be suppressed. As described above, the intake noise can be reduced as the opening area of the window portion 2 increases. For this reason, the intake device of Reference Example 2 can further reduce intake noise compared to the intake devices of Example 1 and Reference Example 1 . That is, in the intake device of the present invention, it is preferable to form the window part 2 in both the downstream straight cylinder part 10b and the upstream straight cylinder part 10a.

一般的な吸気装置を吸気流路に沿って切断した様子を模式的に表す断面図である。It is sectional drawing which represents typically a mode that the general intake device was cut | disconnected along the intake flow path. 図1に示す吸気装置を図1中A−A位置で切断した様子を模式的に表す断面図である。It is sectional drawing which represents typically a mode that the air intake apparatus shown in FIG. 1 was cut | disconnected in the AA position in FIG. 図1に示す吸気装置を図1中B−B位置で切断した様子を模式的に表す断面図である。It is sectional drawing which represents typically a mode that the air intake apparatus shown in FIG. 1 was cut | disconnected in the BB position in FIG. 図1に示す吸気装置を図1中C−C位置で切断した様子を模式的に表す断面図である。It is sectional drawing which represents typically a mode that the air intake apparatus shown in FIG. 1 was cut | disconnected in CC position in FIG. 本発明の吸気装置の一例を模式的に表す斜視図である。It is a perspective view showing typically an example of an air intake device of the present invention. 本発明の吸気装置の一例を模式的に表す斜視図である。It is a perspective view showing typically an example of an air intake device of the present invention. 実施例1の吸気装置を模式的に表す側面図である。FIG. 3 is a side view schematically illustrating the intake device according to the first embodiment. 参考例1の吸気装置を模式的に表す側面図である。FIG. 6 is a side view schematically showing the intake device of Reference Example 1 . 参考例2の吸気装置を模式的に表す側面図である。 10 is a side view schematically showing an intake device of Reference Example 2. FIG. 比較例1の吸気装置を模式的に表す側面図である。It is a side view which represents typically the air intake apparatus of the comparative example 1. 比較例2の吸気装置を模式的に表す側面図である。It is a side view which represents typically the air intake apparatus of the comparative example 2. 比較例3の吸気装置を模式的に表す側面図である。FIG. 10 is a side view schematically showing an intake device of Comparative Example 3. 圧側損失測定試験の結果を表すグラフである。It is a graph showing the result of a compression side loss measurement test.

符号の説明Explanation of symbols

1:本体部、2:窓部、3:多孔質部材、10a:上流直筒部、10b:下流直筒部 1: body part, 2: window part, 3: porous member, 10a: upstream straight cylinder part, 10b: downstream straight cylinder part

Claims (2)

筒状をなし内部が吸気流路を形成する非孔質の本体部と、該本体部の周壁に形成され内外を連通する窓部と、該窓部を覆う多孔質部材と、を持つ吸気装置であって、
該本体部は真っ直ぐに延びる直筒部と、該直筒部に連絡し湾曲して延びる湾曲筒部と、を持ち、
該直筒部は、該湾曲筒部の吸気流路上流側に連絡する上流直筒部と、該湾曲筒部の吸気流路下流側に連絡する下流直筒部とを持ち、
該窓部は該下流直筒部にのみ形成され、
該湾曲筒部の周壁は、該湾曲筒部の延び方向についての曲率が最大となる最大曲率点をとおり該延び方向に沿って延びる第1の線と、該曲率が最小となる最小曲率点をとおり該湾曲筒部の延び方向に沿って延びる第2の線と、を含み、
該湾曲筒部と該下流直筒部との境界部分の径方向断面は、該第1の線との交点である第1の点と、該第2の線との交点である第2の点と、を周上に持ち、
該窓部は、該第1の点と該第2の点とをとおり該下流直筒部の軸線に平行な第1平面と、該下流直筒部の周壁と、の交線を避け、かつ、該第1平面に直交し該下流直筒部の軸線を含む第2平面と、該下流直筒部の周壁と、の交線の少なくとも一部を含む位置に配され、
該下流直筒部における該窓部の周方向長さは、該下流直筒部の周方向長さの1/4以下であることを特徴とする吸気装置。
An air intake apparatus having a non-porous main body part that has a cylindrical shape and forms an intake flow passage inside, a window part that is formed on a peripheral wall of the main body part and communicates between the inside and the outside, and a porous member that covers the window part Because
The main body portion has a straight tube portion that extends straight and a curved tube portion that extends in a curved manner in communication with the straight tube portion,
The straight cylinder part has an upstream straight cylinder part that communicates with the upstream side of the intake channel of the curved cylinder part, and a downstream straight cylinder part that communicates with the downstream side of the intake channel of the curved cylinder part ,
The window portion is formed only in the downstream straight tube portion,
The peripheral wall of the curved cylindrical portion includes a first line extending along the extending direction through a maximum curvature point at which the curvature in the extending direction of the curved cylindrical portion is maximum, and a minimum curvature point at which the curvature is minimized. And a second line extending along the extending direction of the curved tube portion,
A radial cross section of a boundary portion between the curved cylindrical portion and the downstream straight cylindrical portion has a first point that is an intersection with the first line and a second point that is an intersection with the second line. Hold the
Window portion avoids a first plane parallel to the axis of the downstream straight cylindrical portion as a point of the first and the second point, and the peripheral wall of the downstream straight cylindrical portion, the line of intersection, and the A second plane that is orthogonal to the first plane and that includes the axis of the downstream straight cylinder part, and a position that includes at least a part of the intersection of the peripheral wall of the downstream straight cylinder part
An air intake apparatus characterized in that a circumferential length of the window portion in the downstream straight tube portion is ¼ or less of a circumferential length of the downstream straight tube portion .
前記多孔質部材は、前記吸気装置の外面に露出している請求項1に記載の吸気装置。The intake device according to claim 1, wherein the porous member is exposed on an outer surface of the intake device.
JP2006061327A 2006-03-07 2006-03-07 Intake device Expired - Fee Related JP4535005B2 (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04132870A (en) * 1990-09-25 1992-05-07 Mazda Motor Corp Manufacture of intake pipe for engine
JPH05126002A (en) * 1991-10-31 1993-05-21 Nissan Motor Co Ltd Intake device
JP2000282981A (en) * 1999-03-29 2000-10-10 Toyoda Gosei Co Ltd Air suction duct for vehicle
JP2001336457A (en) * 2000-05-26 2001-12-07 Toyoda Gosei Co Ltd Air intake duct
JP2002021657A (en) * 2000-07-06 2002-01-23 Marugo Rubber Ind Co Ltd Intake duct for internal combustion engine and its manufacturing method
JP2003343373A (en) * 2002-03-19 2003-12-03 Nihon Sekiso Industries Co Ltd Intake duct
JP2004293386A (en) * 2003-03-26 2004-10-21 Toyoda Gosei Co Ltd Intake device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04132870A (en) * 1990-09-25 1992-05-07 Mazda Motor Corp Manufacture of intake pipe for engine
JPH05126002A (en) * 1991-10-31 1993-05-21 Nissan Motor Co Ltd Intake device
JP2000282981A (en) * 1999-03-29 2000-10-10 Toyoda Gosei Co Ltd Air suction duct for vehicle
JP2001336457A (en) * 2000-05-26 2001-12-07 Toyoda Gosei Co Ltd Air intake duct
JP2002021657A (en) * 2000-07-06 2002-01-23 Marugo Rubber Ind Co Ltd Intake duct for internal combustion engine and its manufacturing method
JP2003343373A (en) * 2002-03-19 2003-12-03 Nihon Sekiso Industries Co Ltd Intake duct
JP2004293386A (en) * 2003-03-26 2004-10-21 Toyoda Gosei Co Ltd Intake device

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