JP7176887B2 - air hose - Google Patents

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JP7176887B2
JP7176887B2 JP2018154757A JP2018154757A JP7176887B2 JP 7176887 B2 JP7176887 B2 JP 7176887B2 JP 2018154757 A JP2018154757 A JP 2018154757A JP 2018154757 A JP2018154757 A JP 2018154757A JP 7176887 B2 JP7176887 B2 JP 7176887B2
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inner diameter
bellows
bellows portion
air hose
hose
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JP2020029884A (en
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康晴 竹内
純平 稲垣
美津代 高橋
宏之 天野
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Toyota Motor Corp
Toyoda Gosei Co Ltd
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Toyota Motor Corp
Toyoda Gosei Co Ltd
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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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

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Description

本発明は、空気用ホースの蛇腹部の構造に関する。 The present invention relates to the structure of a bellows portion of an air hose.

空気等を流すホースにおいて、振動の伝達を抑制する目的やアライメント調整の目的で蛇腹部を設ける場合が多い。しかし、蛇腹部は内径が大きい山部と内径が小さい谷部とが交互に繰り返し形成される構造のため、蛇腹部の各山谷部分で乱流や渦流が発生する。これにより、主流がスムーズに流れる有効流路が狭まり圧力損失が増大する場合がある。このため、蛇腹部をスパイラル構造として圧力損失の低減を図ることが提案されている（例えば、特許文献１参照）。 A hose through which air or the like flows is often provided with a bellows portion for the purpose of suppressing the transmission of vibration or for the purpose of alignment adjustment. However, since the bellows portion has a structure in which ridges with a large inner diameter and troughs with a small inner diameter are alternately formed, turbulence and eddy currents are generated at each of the ridges and troughs of the bellows. As a result, the effective flow path through which the main stream flows smoothly may be narrowed and the pressure loss may increase. For this reason, it has been proposed to reduce the pressure loss by forming the bellows into a spiral structure (see, for example, Patent Document 1).

特開２００２－１０６７６１号公報JP-A-2002-106761

しかし、特許文献１に記載された従来技術の蛇腹ダクトでは、圧力損失の低減が十分ではなかった。 However, the conventional bellows duct described in Patent Document 1 does not sufficiently reduce the pressure loss.

そこで、本発明は、空気用ホースの太さが大きくなることを抑制しつつ、蛇腹部を有する空気用ホースの圧力損失を低減することを目的とする。 SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to reduce the pressure loss of an air hose having a bellows portion while suppressing an increase in the thickness of the air hose.

本発明に係る空気用ホースは、内側に空気を流す空気用ホースであって、内径が大きい山部と内径が小さい谷部とが流れ方向に向かって交互に繰り返し形成されている蛇腹部を含み、前記蛇腹部において、上流側では前記谷部の内径が下流に向かうにつれて大きくなる一方、下流側では前記谷部の内径が一定であること、を特徴とする。 An air hose according to the present invention is an air hose that allows air to flow inside, and includes a bellows portion in which peaks with a large inner diameter and troughs with a small inner diameter are alternately formed in the direction of flow. In the bellows portion, the inner diameter of the valley portion on the upstream side increases toward the downstream side, while the inner diameter of the valley portion on the downstream side is constant.

本発明は、蛇腹部の谷部の内径が下流に向かうにつれて大きくなることにより、乱流や渦流の発生による有効流路の狭まりを拡径により抑制できるため、蛇腹部を有する空気用ホースの圧力損失を低減することができる。そして、本発明は、蛇腹部の下流側の谷部の内径が一定であることにより、空気用ホースの太さが大きくなることを抑制することができる。そのため、本発明は、空気用ホースの太さが大きくなることを抑制しつつ、空気用ホースの圧力損失を低減することができる。 In the present invention, since the inner diameter of the trough portion of the bellows portion increases toward the downstream, narrowing of the effective flow path due to the occurrence of turbulent flow and swirling flow can be suppressed by expanding the diameter. Loss can be reduced. Further, according to the present invention, since the inner diameter of the trough portion on the downstream side of the bellows portion is constant, it is possible to suppress an increase in the thickness of the air hose. Therefore, the present invention can reduce the pressure loss of the air hose while suppressing an increase in the thickness of the air hose.

本開示の一実施形態である空気用ホースである吸気ホースを含むエンジン吸気系の概略図である。1 is a schematic diagram of an engine intake system including an air intake hose that is an embodiment of the present disclosure; FIG. 図１におけるａ－ａ断面図である。FIG. 2 is a sectional view taken along line aa in FIG. 1; 本実施形態の吸気ホースの蛇腹部における有効流路の狭まりを説明する図である。It is a figure explaining the narrowing of the effective flow path in the bellows part of the intake hose of this embodiment. 比較例１の吸気ホースの蛇腹部における有効流路の狭まりを説明する図である。FIG. 10 is a diagram illustrating narrowing of an effective flow path in the bellows portion of the intake hose of Comparative Example 1; 蛇腹部の谷部内径を拡大する角度と圧力損失との関係を示す図である。It is a figure which shows the relationship between the angle which expands the valley part internal diameter of the bellows part, and pressure loss.

以下、図面を参照しながら、実施形態の空気用ホースである吸気ホース５について説明する。図１に示したエンジン１は不図示の車両に走行用動力源として搭載される。図１に示すように、エンジン１には吸気通路２が接続されている。吸気通路２は、吸気ダクト３、エアクリーナ４、吸気ホース５及びスロットルバルブ６を備えている。吸気ダクト３から吸入されエアクリーナ４で濾過された空気は、吸気ホース５及びスロットルバルブ６を介してエンジン１に送り込まれる。エンジン１の振動がエアクリーナ４を固定している不図示のボデーに伝達することを抑制するために、吸気ホース５には、内径が大きくなって吸気ホース５の径方向外側に突出している山部５１ａと、内径が小さい谷部５１ｂとが流れ方向に向かって交互に繰り返し形成されている蛇腹部５１が設けられている。 Hereinafter, the intake hose 5, which is the air hose of the embodiment, will be described with reference to the drawings. The engine 1 shown in FIG. 1 is mounted on a vehicle (not shown) as a driving power source. As shown in FIG. 1 , an intake passage 2 is connected to an engine 1 . The intake passage 2 includes an intake duct 3 , an air cleaner 4 , an intake hose 5 and a throttle valve 6 . Air sucked from the intake duct 3 and filtered by the air cleaner 4 is sent to the engine 1 via the intake hose 5 and the throttle valve 6 . In order to suppress the vibration of the engine 1 from being transmitted to a body (not shown) to which the air cleaner 4 is fixed, the intake hose 5 has a crest portion which has a large inner diameter and protrudes radially outward from the intake hose 5. A bellows portion 51 is provided in which 51a and trough portions 51b having a small inner diameter are alternately formed repeatedly in the flow direction.

図２に示すように、蛇腹部５１の谷部５１ｂの内径は一定の角度θで下流に向かうにつれて大きくなり、蛇腹部５１より上流側の吸気ホース５の内径φ１よりも蛇腹部５１における下流側の谷部５１ｂの内径φ２の方が大きい。 As shown in FIG. 2, the inner diameter of the trough portion 51b of the bellows portion 51 increases toward the downstream side at a constant angle θ, and the inner diameter φ1 of the intake hose 5 on the upstream side of the bellows portion 51 increases downstream of the bellows portion 51. The inner diameter φ2 of the valley portion 51b of is larger.

図３に示すように、蛇腹部５１では内径が大きい山部５１ａと内径が小さい谷部５１ｂとが交互に繰り返し形成されているため、空気の流れが蛇腹部５１の径方向内側に突出している谷部５１ｂに当たる度に渦を巻き、谷部５１ｂの付近の内側では乱流や渦流が発生する。そのため、主流がスムーズに流れる有効流路の径φ３が蛇腹部５１より上流側の吸気ホース５の内径φ１よりも小さくなる。しかし、下流に向かうにつれて谷部５１ｂの内径が大きくなるため、乱流や渦流の層の厚さＤ１の一部は谷部５１ｂの内径が拡大した分に吸収される。そのため、後で図４を参照して説明する谷部１５１ｂの内径が一定である比較例１の蛇腹構造よりも乱流や渦流の発生による有効流路の径φ３の狭まりを抑制でき、吸気ホース５の圧力損失を低減できる。 As shown in FIG. 3 , in the bellows portion 51 , peak portions 51 a with a large inner diameter and trough portions 51 b with a small inner diameter are alternately and repeatedly formed. Every time it hits the trough 51b, it swirls, and a turbulent flow or a vortex is generated inside the vicinity of the trough 51b. Therefore, the diameter φ3 of the effective flow path through which the main stream flows smoothly is smaller than the inner diameter φ1 of the intake hose 5 on the upstream side of the bellows portion 51 . However, since the inner diameter of the valley portion 51b increases toward the downstream, part of the thickness D1 of the layer of turbulence or swirl is absorbed by the increased inner diameter of the valley portion 51b. Therefore, it is possible to suppress the narrowing of the diameter φ3 of the effective flow path due to the generation of turbulent flow and swirling flow more than the bellows structure of Comparative Example 1 in which the inner diameter of the valley portion 151b is constant, which will be described later with reference to FIG. 5 pressure loss can be reduced.

図４は、谷部１５１ｂの内径φ１が一定である比較例１の吸気ホース１５の蛇腹部１５１の断面図である。蛇腹部１５１の谷部１５１ｂの内径φ１は、図２及び図３の内径φ１と同一である。また、蛇腹部１５１の山部１５１ａ及び谷部１５１ｂの幅と深さは、本実施形態の蛇腹部５１と同一である。先に説明した本実施形態の蛇腹部５１と同様、谷部１５１ｂの内側に厚さＤ２の乱流や渦流の層が生じ、主流がスムーズに流れる有効流路の径φ５は谷部１５１ｂの内径φ１よりも厚さＤ２の２倍の分だけ小さくなる。比較例１では谷部１５１ｂの内径φ１が一定のため、本実施形態の吸気ホース５の蛇腹部５１とは異なり厚さＤ２が谷部１５１ｂの拡大した分に吸収されることはない。また、谷部１５１ｂの内径φ１が一定のため、谷部５１ｂの内径が下流に向かうにつれて大きくなる場合と比較して、谷部１５１ｂに当たって生じた渦流や乱流が、次の下流側の谷部１５１ｂに当たって生じた渦流や乱流と干渉することも多くなる。そのため、乱流や渦流の層の厚さＤ２は図３の厚さＤ１と比較して大きくなる傾向にある。以上の理由により、比較例１では本実施形態の吸気ホース５の蛇腹部５１のように、有効流路の径φ５の狭まりを抑制することができず、圧力損失が大きくなる。 FIG. 4 is a cross-sectional view of the bellows portion 151 of the intake hose 15 of Comparative Example 1 in which the inner diameter φ1 of the valley portion 151b is constant. The inner diameter φ1 of the valley portion 151b of the bellows portion 151 is the same as the inner diameter φ1 in FIGS. Moreover, the width and depth of the peaks 151a and the valleys 151b of the bellows portion 151 are the same as those of the bellows portion 51 of the present embodiment. Similar to the bellows portion 51 of the present embodiment described above, a layer of turbulence and swirl with a thickness D2 is generated inside the trough portion 151b, and the diameter φ5 of the effective flow path through which the main stream flows smoothly is the inner diameter of the trough portion 151b. It is smaller than φ1 by twice the thickness D2. In Comparative Example 1, since the inner diameter φ1 of the valley portion 151b is constant, unlike the bellows portion 51 of the intake hose 5 of this embodiment, the thickness D2 is not absorbed by the expanded portion of the valley portion 151b. In addition, since the inner diameter φ1 of the valley portion 151b is constant, compared to the case where the inner diameter of the valley portion 51b increases toward the downstream side, the vortex or turbulent flow generated by hitting the valley portion 151b can be generated by the following valley portion on the downstream side. Interference with eddies and turbulence generated by hitting 151b also increases. Therefore, the thickness D2 of the layer of turbulence or vortex tends to be larger than the thickness D1 in FIG. For the above reasons, in Comparative Example 1, unlike the bellows portion 51 of the intake hose 5 of the present embodiment, it is not possible to suppress the narrowing of the diameter φ5 of the effective flow path, resulting in a large pressure loss.

実施形態の蛇腹部５１の圧力損失の比較例１の圧力損失に対する低減量は、図２に示す拡大角度θを大きくするほど大きくなる。図５は、図２に示す拡大角度θが０度の比較例１、θが１．５度の実施例１及び、θが３．０度の実施例２の圧力損失の変化を示す。図５の点Ａが比較例１であり、点Ｂが実施例１であり、点Ｃが実施例２である。図５に示すように、拡大角度θが大きくなるほど圧力損失は低減し、実施例２のように拡大角度θを３．０度とした場合には、比較例１と比較して圧力損失を約２５パーセント低減できる。圧力損失低減の効果や吸気ホース５の径拡大を考慮すると、好ましい拡大角度θは０．５度から５．０度までであり、より好ましい拡大角度θは１．０度から３．０度までである。 The reduction amount of the pressure loss of the bellows portion 51 of the embodiment with respect to the pressure loss of Comparative Example 1 increases as the expansion angle θ shown in FIG. 2 increases. FIG. 5 shows changes in pressure loss in Comparative Example 1 in which the expansion angle θ is 0 degree, Example 1 in which θ is 1.5 degrees, and Example 2 in which θ is 3.0 degrees shown in FIG. 2 . Point A in FIG. 5 is Comparative Example 1, Point B is Example 1, and Point C is Example 2. FIG. As shown in FIG. 5, the larger the expansion angle θ, the lower the pressure loss. 25 percent reduction. Considering the effect of reducing pressure loss and enlarging the diameter of the intake hose 5, the preferable expansion angle θ is from 0.5 degrees to 5.0 degrees, and the more preferable expansion angle θ is from 1.0 degrees to 3.0 degrees. is.

しかし、図２に示すように蛇腹部５１の谷部５１ｂの内径を下流に向かうにつれて大きくし続けると、吸気ホース５の太さが大きくなってしまうという弊害が生じる。そこで、吸気ホース５が太くなることを抑制するため、蛇腹部５１において、上流側では谷部５１ｂの内径が下流に向かうにつれて大きくする一方、下流側では谷部５１ｂの内径を一定とする。また、吸気ホース５において、蛇腹部５１ではない部分の内径を下流に向かうにつれて徐々に縮小させることによって、吸気ホース５が太くなることを抑制してもよい。なお、本開示の吸気ホース５は上述した形態に限定されず、本開示の要旨の範囲内において種々の形態にて実施できる。例えば、蛇腹部５１の谷部５１ｂの内径は一定の角度θで拡大し続ける必要はない。蛇腹部５１における上流側では拡大角度θを大きくして、蛇腹部５１における下流側では拡大角度θを小さくしてもよい。また、本実施形態は車両用のエンジン１の吸気通路２に用いる吸気ホース５であるが、空調用など他の用途に用いる空気用ホースにも本実施形態の構成を適用できる。 However, if the inner diameter of the trough portion 51b of the bellows portion 51 continues to increase toward the downstream side as shown in FIG. Therefore, in order to prevent the intake hose 5 from becoming thicker, in the bellows portion 51, the inner diameter of the trough portion 51b on the upstream side is increased toward the downstream side, while the inner diameter of the trough portion 51b on the downstream side is kept constant. In addition , the intake hose 5 may be prevented from becoming thicker by gradually reducing the inner diameter of the portion of the intake hose 5 that is not the bellows portion 51 toward the downstream side. In addition, the intake hose 5 of the present disclosure is not limited to the form described above, and can be implemented in various forms within the scope of the gist of the present disclosure. For example, the inner diameter of the trough portion 51b of the bellows portion 51 need not continue to expand at a constant angle θ. The expansion angle θ may be increased on the upstream side of the bellows portion 51 and may be decreased on the downstream side of the bellows portion 51 . Further, although the present embodiment relates to the intake hose 5 used in the intake passage 2 of the vehicle engine 1, the configuration of the present embodiment can also be applied to air hoses used for other purposes such as air conditioning.

１ エンジン、２ 吸気通路、３ 吸気ダクト、４ エアクリーナ、５、１５ 吸気ホース、６ スロットルバルブ、５１、１５１ 蛇腹部、５１ａ、１５１ａ 山部、５１ｂ、１５１ｂ 谷部。 1 engine, 2 intake passage, 3 intake duct, 4 air cleaner, 5, 15 intake hose, 6 throttle valve, 51, 151 bellows portion, 51a, 151a peak portion, 51b, 151b valley portion.

Claims (2)

内側に空気を流す空気用ホースであって、
内径が大きい山部と内径が小さい谷部とが流れ方向に向かって交互に繰り返し形成されている蛇腹部を含み、
前記蛇腹部において、上流側では前記谷部の内径が下流に向かうにつれて大きくなる一方、下流側では前記谷部の内径が一定であること、
を特徴とする空気用ホース。 An air hose for flowing air inside,
Containing a bellows portion in which crest portions with a large inner diameter and trough portions with a small inner diameter are alternately and repeatedly formed in the flow direction,
In the bellows portion, the inner diameter of the valley portion on the upstream side increases toward the downstream side, while the inner diameter of the valley portion on the downstream side is constant;
An air hose characterized by: 請求項１に記載の空気用ホースであって、
前記空気用ホースのうち前記蛇腹部ではない部分では、内径が下流に向かうにつれて小さくなること、
を特徴とする空気用ホース。 The air hose according to claim 1,
the inner diameter of a portion of the air hose that is not the bellows portion becomes smaller toward the downstream;
An air hose characterized by:
JP2018154757A 2018-08-21 2018-08-21 air hose Active JP7176887B2 (en)

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WO2022211178A1 (en) * 2021-03-28 2022-10-06 정재영 Hose for air cleaner having bellows structure for pressure loss reduction, and method for designing bellows

Citations (6)

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Publication number Priority date Publication date Assignee Title
JP2003274720A (en) 2002-03-22 2003-09-30 Minoru Industrial Co Ltd Conduit for granule
JP2007010063A (en) 2005-06-30 2007-01-18 Inoac Corp Bellows pipe
WO2012093542A1 (en) 2011-01-07 2012-07-12 パナソニック株式会社 Electrostatic atomization device
JP2013060821A (en) 2011-09-12 2013-04-04 Hino Motors Ltd Intake pipe structure
US20140261842A1 (en) 2013-03-12 2014-09-18 Sjm Co., Ltd. Flexible tube for exhaust pipe of automobiles
JP2017078379A (en) 2015-10-21 2017-04-27 トヨタ紡織株式会社 Evaporated fuel adsorption filter for internal combustion engine and intake duct structure for internal combustion engine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003274720A (en) 2002-03-22 2003-09-30 Minoru Industrial Co Ltd Conduit for granule
JP2007010063A (en) 2005-06-30 2007-01-18 Inoac Corp Bellows pipe
WO2012093542A1 (en) 2011-01-07 2012-07-12 パナソニック株式会社 Electrostatic atomization device
JP2013060821A (en) 2011-09-12 2013-04-04 Hino Motors Ltd Intake pipe structure
US20140261842A1 (en) 2013-03-12 2014-09-18 Sjm Co., Ltd. Flexible tube for exhaust pipe of automobiles
JP2017078379A (en) 2015-10-21 2017-04-27 トヨタ紡織株式会社 Evaporated fuel adsorption filter for internal combustion engine and intake duct structure for internal combustion engine

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