JP4573714B2 - Intake manifold made of synthetic resin - Google Patents

Intake manifold made of synthetic resin Download PDF

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Publication number
JP4573714B2
JP4573714B2 JP2005195261A JP2005195261A JP4573714B2 JP 4573714 B2 JP4573714 B2 JP 4573714B2 JP 2005195261 A JP2005195261 A JP 2005195261A JP 2005195261 A JP2005195261 A JP 2005195261A JP 4573714 B2 JP4573714 B2 JP 4573714B2
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intake manifold
mounting flange
tank
synthetic resin
intake
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JP2007009884A (en
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格 野口
昭二郎 福田
佳行 海野
泰 松浦
佳寛 秋山
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Honda Motor Co Ltd
Keihin Corp
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Honda Motor Co Ltd
Keihin Corp
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Priority to EP06013760.1A priority patent/EP1748167B1/en
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Description

本発明は、多気筒エンジンに複数の締結部材により締結され、エンジンの吸気ポートに連なる複数の空気出口を有する取り付けフランジ部と、前記締結部材の装着経路を避けるように前記取り付けフランジ部から離間して配置され、大気を導入するサージ室を有するタンク部と、このタンク部及び前記取り付けフランジ部間に連結され、前記サージ室及び空気出口間を連通する複数の吸気路を有する管路部とからなり、前記取り付けフランジ部及びタンク部間には、その両端部同士を一体に連結する架橋部を設けた、合成樹脂製の吸気マニフォルドの改良に関する。   According to the present invention, a multi-cylinder engine is fastened by a plurality of fastening members and has a plurality of air outlets connected to an intake port of the engine, and a mounting flange portion spaced apart from the mounting flange portion so as to avoid a mounting path for the fastening members. And a tank portion having a surge chamber for introducing the atmosphere, and a conduit portion having a plurality of intake passages connected between the tank portion and the mounting flange portion and communicating between the surge chamber and the air outlet. Thus, the present invention relates to an improvement in an intake manifold made of synthetic resin, in which a bridging portion for integrally connecting both end portions is provided between the mounting flange portion and the tank portion.

かゝる吸気マニフォルドは、特許文献１に開示されているように既に知られている。
特開２０００−１７９４１９号公報 Such an intake manifold is already known as disclosed in US Pat.
JP 2000-179419 A

特許文献１に開示される合成樹脂製の吸気マニフォルドでは、取り付けフランジ部及びタンク部間の架橋部を単純な平板壁で構成しているが、その架橋部は、タンク部の上方から発生した音が一側方から外部に直接漏れ出るのを防ぐためのもので、取り付けフランジ部によるタンク部の支持剛性を強化するためのものではない。したがって、こうしたものでは、取り付けフランジ部によるタンク部の支持剛性が不足するため、エンジンの運転中、タンク部が振動して騒音が発生し易くなるのみならず、各部の耐久性の低下を招く虞がある。   In the intake manifold made of synthetic resin disclosed in Patent Document 1, the bridge portion between the mounting flange portion and the tank portion is configured by a simple flat plate wall. The bridge portion is a sound generated from above the tank portion. This is to prevent the leakage of the water directly from one side to the outside, and not to strengthen the support rigidity of the tank portion by the mounting flange portion. Therefore, in such a case, since the supporting rigidity of the tank part by the mounting flange part is insufficient, not only the tank part vibrates and noise is easily generated during operation of the engine, but also the durability of each part may be reduced. There is.

本発明は、かゝる事情に鑑みてなされたもので、取り付けフランジ部によるタンク部の支持剛性高く、エンジンの運転中、タンク部の振動を効果的に抑制し得るようにした、合成樹脂製の吸気マニフォルドを提供することを目的とする。   The present invention has been made in view of such circumstances, and has a high support rigidity of the tank portion by the mounting flange portion, and is capable of effectively suppressing vibration of the tank portion during operation of the engine. The purpose is to provide an intake manifold.

上記目的を達成するために、本発明は、多気筒エンジンに複数の締結部材により締結され、エンジンの吸気ポートに連なる複数の空気出口を有する取り付けフランジ部と、前記締結部材の装着経路を避けるように前記取り付けフランジ部から離間して配置され、大気を導入するサージ室を有するタンク部と、このタンク部及び前記取り付けフランジ部間に連結され、前記サージ室及び空気出口間を連通する複数の吸気路を有する管路部とからなり、前記取り付けフランジ部及びタンク部間には、その両端部同士を一体に連結する架橋部を設けた、合成樹脂製の吸気マニフォルドにおいて、前記取り付けフランジ部の一方の端部の外側に配置されてスロットルボディが取り付け可能な小フランジ部から前記タンク部に向かって延びる短管部が、前記スロットルボディからの流入大気を前記サージ室に導入する導入路を有すると共に、該短管部と前記取り付けフランジ部の一方の端部とが、その相互間の隔壁を共有するようにして一体に接続されており、前記取り付けフランジ部及び前記タンク部の一方の端部同士を一体に連結する一方の前記架橋部が、前記短管部で構成されることを第１の特徴とする。 In order to achieve the above object, the present invention avoids a mounting flange portion which is fastened to a multi-cylinder engine by a plurality of fastening members and has a plurality of air outlets connected to an intake port of the engine, and a mounting path for the fastening members. And a tank portion having a surge chamber for introducing air, and a plurality of intake airs connected between the tank portion and the mounting flange portion and communicating between the surge chamber and the air outlet. In the intake manifold made of synthetic resin, which is provided with a bridging portion that integrally connects both end portions between the mounting flange portion and the tank portion, and one of the mounting flange portions. A short pipe portion that is arranged on the outside of the end portion and extends from the small flange portion to which the throttle body can be attached toward the tank portion, In addition to having an introduction path for introducing the air flowing in from the throttle body into the surge chamber, the short pipe portion and one end of the mounting flange portion are integrated so as to share a partition wall therebetween. is connected, the mounting flange portion and the bridge portion one for connecting the ends together one of the tank portions, the first feature to be configured with the short tube portion.

尚、前記締結部材は、後述する本発明の実施例中の締結ボルト２に対応する。   In addition, the said fastening member respond | corresponds to the fastening bolt 2 in the Example of this invention mentioned later.

また本発明は、第１の特徴に加えて、前記取り付けフランジ部及びタンク部の他方の端部同士を一体に連結する他方の架橋部を、断面コ字状に形成したことを第２の特徴とする。   In addition to the first feature, the present invention is characterized in that the other bridging portion that integrally connects the other end portions of the mounting flange portion and the tank portion is formed in a U-shaped cross section. And

さらに本発明は、第１または第２の特徴を有する、少なくとも第１，第２ブロックに分けられた合成樹脂製の吸気マニフォルドであって、前記第１ブロックには、前記取り付けフランジ部、前記短管部の一半部、前記タンク部の一半部及び前記管路部の入口部が形成されることを第３の特徴とする。Further, the present invention is a synthetic resin intake manifold having at least first and second blocks having the first or second characteristics, wherein the first block includes the mounting flange portion, the short block. A third feature is that a half part of the pipe part, a half part of the tank part, and an inlet part of the conduit part are formed.

本発明の第１の特徴によれば、合成樹脂製吸気マニフォルドにおける取り付けフランジ部の一方の端部の外側に配置されてスロットルボディが取り付け可能な小フランジ部から同マニフォルドのタンク部に向かって延びる短管部が、大気をサージ室に導入するための導入路を有しており、その短管部と前記取り付けフランジ部の一方の端部とが、その相互間の隔壁を共有するようにして一体に接続されており、その取り付けフランジ部及びタンク部の一方の端部同士を一体に連結する一方の架橋部が、大気導入路を有する高剛性の上記短管部で構成されるので、取り付けフランジ部のエンジンへの取り付け状態では、取り付けフランジ部はタンク部を強固に支持することができる。したがって、エンジンの運転中、タンク部の振動をよく防いで騒音の発生抑制すると共に、振動による各部の耐久性の低下を防ぐことができ、しかも短管部が架橋部を兼ねることで構造の簡素化を図ることができる。また短管部は、断面積が比較的大きいため、吸気マニフォルドのインジェクション成形時の成形性を向上させることができる。 According to the first aspect of the present invention, the intake flange portion of the synthetic resin is disposed outside one end portion of the mounting flange portion and extends from the small flange portion to which the throttle body can be attached toward the tank portion of the manifold. The short pipe portion has an introduction path for introducing air into the surge chamber, and the short pipe portion and one end of the mounting flange portion share a partition wall therebetween. are connected together, so that one of the bridge that one connected integrally to end portions of the mounting flange and the tank portion is constituted by the short pipe portion of high rigidity having air intake path, mounting When the flange portion is attached to the engine, the attachment flange portion can firmly support the tank portion. Therefore, during the operation of the engine, the vibration of the tank part is well prevented to suppress the generation of noise, the durability of each part can be prevented from lowering due to vibration, and the short pipe part also serves as the bridging part, so the structure is simple Can be achieved. The short pipe section, is relatively large cross-sectional area, it is possible to improve the moldability during injection molding of the intake Maniforu de.

本発明の第２の特徴によれば、他方の架橋部の剛性を効果的に高めて、短管部の剛性と釣り合わせることができるので、取り付けフランジ部によるタンク部の支持を一層強固なものとすることができる。   According to the second feature of the present invention, the rigidity of the other bridging part can be effectively increased and balanced with the rigidity of the short pipe part, so that the tank part is more firmly supported by the mounting flange part. It can be.

さらに本発明の第３の特徴によれば、合成樹脂製の吸気マニフォルドの形成を容易にすることができる。Furthermore, according to the third aspect of the present invention, the intake manifold made of synthetic resin can be easily formed.

本発明の実施の形態を、添付図面に示す本発明の実施例に基づいて以下に説明する。   DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below based on examples of the present invention shown in the accompanying drawings.

図１は本発明の実施例に係る吸気制御装置をエンジンへの取り付け状態で示す側面図、図２は図１の２−２線断面図、図３は図１の３矢視図、図４は図１の４−４線断面図、図５は図２の５−５線断面図（低速吸気モードの吸気マニフォルド内部を示す。）、図６は高速吸気モードの吸気マニフォルド内部を示す、図５との対応図、図７は吸気マニフォルドの第１ブロックの内側面、図８は吸気マニフォルドの第２ブロックの内側面、図９は図７の９−９線断面図、図１０は吸気マニフォルド内に設置されるバタフライ型開閉弁の底面図、図１１は同開閉弁の側面図である。   1 is a side view showing an intake control device according to an embodiment of the present invention attached to an engine, FIG. 2 is a sectional view taken along line 2-2 of FIG. 1, FIG. 3 is a view taken in the direction of arrow 3 in FIG. 1 is a cross-sectional view taken along line 4-4 in FIG. 1, FIG. 5 is a cross-sectional view taken along line 5-5 in FIG. 2 (showing the inside of the intake manifold in the low-speed intake mode), and FIG. 7 is an inner surface of the first block of the intake manifold, FIG. 8 is an inner surface of the second block of the intake manifold, FIG. 9 is a sectional view taken along line 9-9 of FIG. 7, and FIG. 10 is an intake manifold. FIG. 11 is a side view of the on / off valve. FIG.

先ず、図１〜図３において、エンジンＥのシリンダヘッドＥｈに合成樹脂製の吸気マニフォルドＭが取り付けられる。この吸気マニフォルドＭは、図示例では４気筒エンジン用であり、エンジンＥのシリンダヘッドＥｈに複数の締結ボルト２，２…により締結される取り付けフランジ部１と、この取り付けフランジ部１の一端部の外側方にそれと角度をなして（図示例では略直角に）配置され、スロットルボディＴが取り付けられる小フランジ部３と、この小フランジ部３から下方に延びる短管部４と、この短管部４の下端部に連結されるタンク部５と、このタンク部５の下部から延出し且つタンク部５の背面に沿って上方に延びて取り付けフランジ部１に連結されると共に、相互に連結される４本の管路部６，６…とを備えており、タンク部５及び管路部６，６…は、それらの間の境界壁を共有している。上記タンク部５は、前記締結ボルト２，２…の装着経路を避けて、取り付けフランジ部１の下方に配置される。   1 to 3, a synthetic resin intake manifold M is attached to a cylinder head Eh of the engine E. The intake manifold M is for a four-cylinder engine in the illustrated example. The intake flange M is fastened to a cylinder head Eh of the engine E by a plurality of fastening bolts 2, 2. A small flange portion 3 that is disposed on the outer side at an angle (substantially at right angles in the illustrated example) to which the throttle body T is attached, a short pipe portion 4 that extends downward from the small flange portion 3, and the short pipe portion 4 and a tank part 5 connected to the lower end part of the tank 4 and extending from the lower part of the tank part 5 and extending upward along the back surface of the tank part 5 to be connected to the mounting flange part 1 and to each other. .. Are provided, and the tank part 5 and the pipe parts 6, 6... Share a boundary wall therebetween. The tank portion 5 is disposed below the mounting flange portion 1 while avoiding the mounting path of the fastening bolts 2, 2.

図１〜図５に示すように、小フランジ部３の端面には、スロットルボディＴの吸気道に連なる空気入口７が、また取り付けフランジ部１の端面には、シリンダヘッドＥｈの４本の吸気ポートにそれぞれ連なる４つの空気出口８，８…がそれぞれ開口する。短管部４には、空気入口７に一端を連ねる導入路９が形成され、タンク部５には、導入路９の他端に連なる大容積のサージ室１０が形成され、管路部６，６…には、サージ室１０を空気出口８，８…に連通させる第１吸気路１１，１１…が形成される。   As shown in FIGS. 1 to 5, an air inlet 7 connected to the intake passage of the throttle body T is provided at the end face of the small flange portion 3, and four intake air of the cylinder head Eh is provided at the end face of the mounting flange portion 1. Four air outlets 8, 8... Respectively connected to the ports are opened. The short pipe section 4 is formed with an introduction path 9 that is connected to one end of the air inlet 7, and the tank section 5 is formed with a large volume surge chamber 10 that is connected to the other end of the introduction path 9. 6... Are formed with first intake passages 11, 11... That connect the surge chamber 10 to the air outlets 8, 8.

またタンク部５には、サージ室１０を第１吸気路１１，１１…の途中に連通させて、第１吸気路１１，１１…の下流側部分を、それ自身の下流側部分とする４本の第２吸気路１２，１２…が形成される。したがって、第２吸気路１２，１２…は、サージ室１０から空気出口８，８…に至る流路長が、第１吸気路１１，１１…の流路長より短くなっている。   Further, the tank portion 5 is connected to the surge chamber 10 in the middle of the first intake passages 11, 11... And the downstream portion of the first intake passages 11, 11. Are formed. Therefore, the flow path length from the surge chamber 10 to the air outlets 8, 8,... Is shorter than the flow path length of the first intake paths 11, 11,.

上記構成の吸気マニフォルドＭの形成を容易にすべく、吸気マニフォルドＭは、図８及び図９に示す少なくとも二つのブロック、即ち第１及び第２Ｍ１、Ｍ２に分けられて、それぞれ合成樹脂によりインジェクション成形される。その際、第１ブロックＭ１には、取り付けフランジ部１、短管部４の一半部、タンク部５の一半部及び管路部６，６…の入口部が形成される。第２ブロックＭ２には、小フランジ部３、短管部４の他半部、タンク部５の他半部及び管路部６，６…の残りの主要部が形成される。そして両ブロックＭ１、Ｍ２は、それらの分割面Ｍ１ａ、Ｍ２ａで相互に振動溶着される。その際、第２ブロックＭ２の管路部６，６…は、それらの上端部が第１ブロックＭ１の取り付けフランジ部１に溶着されるのであるが、これら管路部６，６…は、前記締結ボルト２，２…の装着経路を避けて配置されている。   In order to facilitate the formation of the intake manifold M having the above-described configuration, the intake manifold M is divided into at least two blocks shown in FIGS. 8 and 9, that is, first and second M1 and M2, and each is formed by injection molding with a synthetic resin. Is done. At that time, the first block M1 is formed with an attachment flange portion 1, a half portion of the short tube portion 4, a half portion of the tank portion 5, and the inlet portions of the conduit portions 6, 6,. In the second block M2, the small flange portion 3, the other half portion of the short pipe portion 4, the other half portion of the tank portion 5, and the remaining main portions of the pipe portions 6, 6,. Both blocks M1 and M2 are vibration welded to each other at their divided surfaces M1a and M2a. At that time, the pipe sections 6, 6... Of the second block M2 have their upper ends welded to the mounting flange section 1 of the first block M1, but these pipe sections 6, 6,. It is arrange | positioned avoiding the mounting | wearing path | route of fastening bolt 2,2, ....

ところで、図７に示すように、取り付けフランジ部１の一端部と、その取り付けフランジ部１及びタンク部５の一端部の外側に配置される短管部４とは、その相互間の隔壁を共有するようにして一体に接続されており、その取り付けフランジ部１とタンク部５とは短管部４を介して相互に連結される。第１ブロックＭ１において、短管部４と反対側で取り付けフランジ部１及びタンク部５間を連結する一対の架橋部１３が一体に形成される（図５、図７及び図９参照）。この架橋部１３は、その曲げ剛性を極力高めるべく、断面形状がコ字状になっている。而して、短管部４も取り付けフランジ部１及びタンク部５間の一端部同士を一体に連結する架橋部を兼ねることになる。 Meanwhile, as shown in FIG. 7, one end portion of the mounting flange 1, and the short tube portion 4 disposed on the outside of one end portion of the mounting flange 1 and the tank unit 5, share a partition wall between the mutual to way is connected integrally, they are interconnected via a short pipe section 4 and the mounting flange portion 1 and the tank unit 5. In the first block M1, a pair of bridging portions 13 for connecting the mounting flange portion 1 and the tank portion 5 on the side opposite to the short tube portion 4 are integrally formed (see FIGS. 5, 7, and 9). The bridging portion 13 has a U-shaped cross section so as to increase the bending rigidity as much as possible. Thus, the short pipe portion 4 also serves as a bridging portion that integrally connects one end portions between the mounting flange portion 1 and the tank portion 5.

図４、図５及び図８に示すように、第２ブロックＭ２において、タンク部５の内壁には、第２吸気路１２，１２…の入口を一斉に開閉するバタフライ型の開閉弁Ｖが設置される。この開閉弁Ｖは、第２吸気路１２，１２…の入口に配置される共通の弁ケース１５を備える。この弁ケース１５は、アルミニューム等の軽合金を素材とした鋳造製であり、第２吸気路１２，１２…の入口に連なるように、第２吸気路１２，１２…の配列方向に一列に並ぶ四つの楕円状の弁孔１６，１６…を有しており、これら弁孔１６，１６…を横断するように配置される一本の弁軸１７が弁ケース１５に回転自在に支承される。したがって、弁ケース１５の端壁、並びに各弁孔１６，１６…間の隔壁には弁軸１７を支承する軸受孔１８，１８…が形成されている。   As shown in FIGS. 4, 5, and 8, in the second block M <b> 2, a butterfly type on-off valve V that opens and closes the inlets of the second intake passages 12, 12. Is done. The on-off valve V includes a common valve case 15 disposed at the inlet of the second intake passages 12, 12. The valve case 15 is made of a light alloy such as aluminum, and is arranged in a row in the arrangement direction of the second intake passages 12, 12, so as to be connected to the inlets of the second intake passages 12, 12. Four oval valve holes 16, 16... Are arranged side by side, and one valve shaft 17 arranged so as to cross the valve holes 16, 16... Is rotatably supported by the valve case 15. . Therefore, bearing holes 18, 18... For supporting the valve shaft 17 are formed in the end wall of the valve case 15 and the partition walls between the valve holes 16, 16..

弁軸１７には、各弁孔１６，１６…において楕円状の複数の弁板１９，１９…がビス２３，２３により固着され、弁軸１７の往復回動により弁板１９，１９…が対応する弁孔１６，１６…を開閉するようになっている。こうして構成される開閉弁Ｖは、吸気マニフォルドＭとは別個に組み立てられるものである。   A plurality of elliptical valve plates 19, 19... Are fixed to the valve shaft 17 by screws 23, 23 in each valve hole 16, 16..., And the valve plates 19, 19. Are opened and closed. The on-off valve V configured in this way is assembled separately from the intake manifold M.

図４に明示するように、第２ブロックＭ２には、第２吸気路１２，１２…の配列方向に沿う両側に配置されて第２ブロックＭ２の内方に突出する一対の支持ボス２０，２０が一体に形成されており、各支持ボス２０，２０は、その中心部を貫通するボルト孔２０ａ，２０ａを有する。   As clearly shown in FIG. 4, the second block M2 includes a pair of support bosses 20, 20 that are arranged on both sides along the arrangement direction of the second intake passages 12, 12, and protrude inward of the second block M <b> 2. Are formed integrally, and each support boss 20, 20 has bolt holes 20 a, 20 a penetrating through the center thereof.

一方、弁ケース１５の、弁軸１７の軸線方向に沿う長手方向両端部の一側面には、上記支持ボス２０，２０と端面同士を当接させる一対の連結ボス２１，２１が一体に形成され、各連結ボス２１，２１は、その中心部に前記ボルト孔２０ａ，２０ａと合致する袋状のねじ孔２１ａ，２１ａを有する。そして、第２ブロックＭ２の外方からボルト孔２０ａ，２０ａに挿通した締結ボルト２２，２２をねじ孔２１ａ，２１ａに螺合緊締することにより、弁ケース１５は第２ブロックＭ２の内壁に締結される。   On the other hand, a pair of connecting bosses 21, 21 for bringing the support bosses 20, 20 into contact with the end surfaces are integrally formed on one side surface of the valve case 15 along the axial direction of the valve shaft 17. Each connecting boss 21, 21 has a bag-like screw hole 21 a, 21 a that matches the bolt hole 20 a, 20 a at the center thereof. The valve case 15 is fastened to the inner wall of the second block M2 by screwing and tightening the fastening bolts 22 and 22 inserted into the bolt holes 20a and 20a from the outside of the second block M2 into the screw holes 21a and 21a. The

図１０及び図１１に明示するように、弁ケース１５の両外側面には、弁軸１７の軸方向に延びて一対の連結ボス２１，２１間に亙る複数条の縦リブ２４，２４…と、これら縦リブ２４，２４…と交差する複数条の横リブ２５，２５…とが一体に形成され、これらリブ２４，２４…；２５，２５…によって、弁ケース１５の、一対の連結ボス２１，２１間での剛性が強化され、その剛性は、第２ブロックＭ２の、一対の支持ボス２０，２０間での剛性より大とされる。   As clearly shown in FIGS. 10 and 11, a plurality of vertical ribs 24, 24... Extending between the pair of connecting bosses 21, 21 extend in the axial direction of the valve shaft 17 on both outer surfaces of the valve case 15. A plurality of horizontal ribs 25, 25... Intersecting with the vertical ribs 24, 24... Are integrally formed, and the ribs 24, 24. , 21 is reinforced, and the rigidity of the second block M2 is greater than that between the pair of support bosses 20, 20.

再び図１及び図４において、第２ブロックＭ２の一端壁には、開閉弁Ｖの、タンク部５内への挿入を可能にする挿入口２７が開口しており、この挿入口２７を閉じる蓋体２８が複数のボルト２９，２９…で第２ブロックＭ２に締結される。蓋体２８は、弁軸１７の一端部に連結してそれを回転作動する、減速機構付きの電動モータ３０が付設される。   1 and 4 again, an insertion port 27 that allows the opening / closing valve V to be inserted into the tank unit 5 is opened in one end wall of the second block M2, and a lid that closes the insertion port 27 is opened. The body 28 is fastened to the second block M2 with a plurality of bolts 29, 29. The lid body 28 is provided with an electric motor 30 with a speed reduction mechanism that is connected to one end portion of the valve shaft 17 and rotates it.

次に、この実施例の作用について説明する。   Next, the operation of this embodiment will be described.

エンジンＥの低速運転時には、電動モータ３０により開閉弁Ｖが閉弁状態に保持される。即ち、弁板１９，１９…により弁孔１６，１６…を閉じて第２吸気路１２，１２…の入口を閉鎖する。その結果、エンジンＥの各気筒の吸気行程では、スロットルボディＴで流量を制御された空気は、導入路９を経てサージ室１０に流入すると、流路長が長い第１吸気路１１，１１…を通してエンジンＥに供給されることになる。したがって吸気マニフォルドＭの内部は低速運転に適応する低速吸気モードとなり、エンジンＥの低速出力性能を高めることができる。またエンジンＥの高速運転時には、電動モータ３０により開閉弁Ｖが開弁状態に切り換えられ、弁板１９，１９…により弁孔１６，１６…を開いて、第２吸気路１２，１２…を導通通態にする。その結果、エンジンＥの各気筒の吸気行程では、スロットルボディＴで流量を制御された空気は、導入路９を経てサージ室１０に流入すると、主として流路長が短い第２吸気路１２，１２…を通してエンジンＥに供給されることになる。したがって吸気マニフォルドＭの内部は高速運転に適応する高速吸気モードとなり、エンジンＥの高速出力性能を高めることができる。   During the low speed operation of the engine E, the open / close valve V is held in the closed state by the electric motor 30. That is, the valve holes 16, 16 ... are closed by the valve plates 19, 19 ..., and the inlets of the second intake passages 12, 12 ... are closed. As a result, in the intake stroke of each cylinder of the engine E, when the air whose flow rate is controlled by the throttle body T flows into the surge chamber 10 through the introduction passage 9, the first intake passages 11, 11,. To be supplied to the engine E. Therefore, the inside of the intake manifold M becomes a low-speed intake mode adapted to low-speed operation, and the low-speed output performance of the engine E can be enhanced. During high-speed operation of the engine E, the open / close valve V is switched to the open state by the electric motor 30, and the valve holes 16, 16 ... are opened by the valve plates 19, 19 ... to conduct the second intake passages 12, 12, ... Putting it into communication. As a result, in the intake stroke of each cylinder of the engine E, when the air whose flow rate is controlled by the throttle body T flows into the surge chamber 10 through the introduction path 9, the second intake paths 12, 12 mainly having a short flow path length. ... will be supplied to the engine E through. Accordingly, the inside of the intake manifold M becomes a high-speed intake mode adapted to high-speed operation, and the high-speed output performance of the engine E can be enhanced.

このようなエンジン用吸気制御装置の組み立てに当たっては、吸気マニフォルドＭ及び開閉弁Ｖをそれぞれ別工程で組み立てた後、開閉弁Ｖを吸気マニフォルドＭの挿入口２７からタンク部５内に収め、吸気マニフォルドＭの外側から、支持ボス２０，２０のボルト孔２０ａ，２０ａに挿通した締結ボルト２２，２２を、弁ケース１５の連結ボス２１，２１のねじ孔２１ａ，２１ａに螺合緊締し、次いで蓋体２８を吸気マニフォルドＭに接合して挿入口を閉鎖すると共に、弁軸１７を蓋体２８上の電動モータ３０に連結して組み立てを完了する。このように、吸気マニフォルドＭ及び開閉弁Ｖの並行組み立てを行うことで、装置の組立性は著しく向上する。   In assembling such an intake control device for an engine, after the intake manifold M and the open / close valve V are assembled in separate processes, the open / close valve V is placed in the tank portion 5 from the insertion port 27 of the intake manifold M, and the intake manifold is assembled. From the outside of M, the fastening bolts 22 and 22 inserted into the bolt holes 20a and 20a of the support bosses 20 and 20 are screwed and tightened into the screw holes 21a and 21a of the connecting bosses 21 and 21 of the valve case 15, and then the lid body. 28 is joined to the intake manifold M to close the insertion port, and the valve shaft 17 is connected to the electric motor 30 on the lid 28 to complete the assembly. As described above, by performing the parallel assembly of the intake manifold M and the on-off valve V, the assembly of the apparatus is remarkably improved.

しかも、弁ケース１５の締結ボルト２２，２２による吸気マニフォルドＭへの締結箇所は、弁ケース１５の両端部の二箇所であるから、これら締結箇所に邪魔されることなく四つの弁孔１６，１６…を相互に近接配置することが可能となり、弁ケース１５、延いては吸気マニフォルドＭのコンパクト化を図ることができる。   Moreover, since the fastening points 22 and 22 of the valve case 15 are fastened to the intake manifold M at the two ends of the valve case 15, the four valve holes 16 and 16 are not obstructed by these fastening points. Can be arranged close to each other, and the valve case 15 and thus the intake manifold M can be made compact.

また弁ケース１５には、弁軸１７の軸方向に延びて一対の連結ボス２１，２１間に亙る複数条の縦リブ２４，２４…と、これら縦リブ２４，２４…と交差する複数条の横リブ２５，２５…とを一体に形成して、弁ケース１５の、一対の連結ボス２１，２１間での剛性を、吸気マニフォルドＭの、一対の支持ボス２０，２０間での剛性より大としてあるから、支持ボス２０，２０及び連結ボス２１，２１間の締結ボルト２２，２２による締結時、両ボス２０，２１の突き合わせ面の平行度等につき、多少の製作誤差があっても、締結力により吸気マニフォルドＭ側に歪みが生じることになり、したがって弁ケース１５には殆ど歪みが発生せず、軸受孔１８，１８…の変形や軸受孔１８，１８…相互の位置ずれを防ぐことができるので、弁軸１７と軸受孔１８，１８…の内周面との摩擦抵抗の増加が回避させ、電動モータ３０による弁軸１７のスムーズな回転作動を常に確保することができる。   Further, the valve case 15 includes a plurality of vertical ribs 24 extending in the axial direction of the valve shaft 17 and extending between the pair of connecting bosses 21, 21, and a plurality of strips intersecting the vertical ribs 24, 24. The lateral ribs 25, 25... Are integrally formed so that the rigidity of the valve case 15 between the pair of connecting bosses 21, 21 is greater than the rigidity of the intake manifold M between the pair of support bosses 20, 20. Therefore, when the fastening bosses 22 and 22 between the support bosses 20 and 20 and the connecting bosses 21 and 21 are fastened, even if there is a slight manufacturing error in the parallelism of the abutting surfaces of both the bosses 20 and 21 As a result, the intake manifold M side is distorted by the force, so that the valve case 15 is hardly distorted and the deformation of the bearing holes 18, 18... And the mutual displacement of the bearing holes 18, 18. Because it can, valve stem 17 Increase in the frictional resistance between the bearing hole 18, 18 ... inner peripheral surface of the can is avoided, the smooth rotation operation of the valve shaft 17 by the electric motor 30 can be always secured.

またサージ室１０を形成するタンク部５は、エンジンＥのシリンダヘッドＥｈに複数の締結ボルト２，２…により締結される取り付けフランジ部１に対し、上記締結ボルト２，２…の装着経路を避けて取り付けフランジ部１の下方に配置されるので、このタンク部５に邪魔されることなく、取り付けフランジ部１をシリンダヘッドＥｈに容易に取り付けることができる。しかも取り付けフランジ部１及びタンク部５には、その両者２，５の両端部同士を連結する架橋部４，１３が一体に形成され、特に、一方の架橋部４は、スロットルボディＴからタンク部５内のサージ室１０に空気を導入するための導入路９を形成する高剛性の短管部４で構成されるので、取り付けフランジ部１のシリンダヘッドＥｈへの取り付け状態では、取り付けフランジ部１は、架橋部４，１３を介してタンク部５を強固に支持することができる。したがって、エンジンＥの運転中、タンク部５の振動をよく防いで、騒音の発生抑制すると共に、振動による各部の耐久性の低下を防ぐことができ、しかも短管部４が架橋部を兼ねることで構造の簡素化をもたらすことになる。   Further, the tank portion 5 forming the surge chamber 10 avoids the mounting path of the fastening bolts 2, 2... To the mounting flange portion 1 fastened to the cylinder head Eh of the engine E by a plurality of fastening bolts 2, 2.. Therefore, the mounting flange portion 1 can be easily attached to the cylinder head Eh without being obstructed by the tank portion 5. In addition, the mounting flange portion 1 and the tank portion 5 are integrally formed with bridging portions 4 and 13 that connect both ends of the two and 5, and in particular, one bridging portion 4 extends from the throttle body T to the tank portion. 5 is composed of a highly rigid short pipe portion 4 that forms an introduction path 9 for introducing air into the surge chamber 10 in the interior 5, so that the attachment flange portion 1 is in a state where the attachment flange portion 1 is attached to the cylinder head Eh. Can firmly support the tank portion 5 via the bridging portions 4 and 13. Therefore, during the operation of the engine E, the vibration of the tank part 5 can be well prevented, the generation of noise can be suppressed, the durability of each part can be prevented from being lowered due to the vibration, and the short pipe part 4 can also serve as a bridging part. This will simplify the structure.

また他方の架橋部１３は、断面コ字状のものを一対並べて構成されるので、その剛性を短管部４の剛性と釣り合わせることができ、取り付けフランジ部１によるタンク部５の支持を一層強固なものとすることができる。   The other bridging portion 13 is configured by arranging a pair of U-shaped cross-sections so that the rigidity can be balanced with the rigidity of the short pipe portion 4, and the mounting flange portion 1 can further support the tank portion 5. It can be strong.

そして、このような短管部４及び架橋部１３は、断面積が比較的大きいため、吸気マニフォルドＭのインジェクション成形時には、溶融樹脂が取り付けフランジ部１から短管部４及び架橋部１３を通してタンク部５全体に流れ込むことになり、成形性を向上させることができる。   And since such a short pipe part 4 and the bridge | bridging part 13 have comparatively large cross-sectional area, at the time of injection molding of the intake manifold M, a molten resin passes through the short pipe part 4 and the bridge | bridging part 13 from the attachment flange part 1, and a tank part. 5 will flow into the whole, and the moldability can be improved.

本発明は上記実施例に限定されるものではなく、その要旨を逸脱しない範囲で種々の設計変更が可能である。例えば、本発明は、上記４気筒以外の多気筒エンジン用にも適用することができる。   The present invention is not limited to the above embodiments, and various design changes can be made without departing from the scope of the invention. For example, the present invention can be applied to a multi-cylinder engine other than the above-described four cylinders.

本発明の実施例に係る吸気制御装置をエンジンへの取り付け状態で示す側面図。The side view which shows the intake control apparatus which concerns on the Example of this invention in the attachment state to an engine. 図１の２−２線断面図。FIG. 2 is a sectional view taken along line 2-2 in FIG. 1. 図１の３矢視図。FIG. 3 is a view taken in the direction of arrow 3 in FIG. 1. 図１の４−４線断面図。FIG. 4 is a sectional view taken along line 4-4 of FIG. 図２の５−５線断面図（低速吸気モードの吸気マニフォルド内部を示す。）。FIG. 5 is a cross-sectional view taken along line 5-5 of FIG. 高速吸気モードの吸気マニフォルド内部を示す、図５との対応図。FIG. 6 is a view corresponding to FIG. 5 showing the inside of the intake manifold in the high-speed intake mode. 吸気マニフォルドの第１ブロックの内側面。Inner side of the first block of the intake manifold. 吸気マニフォルドの第２ブロックの内側面。Inner side of the second block of the intake manifold. 図７の９−９線断面図。FIG. 9 is a cross-sectional view taken along line 9-9 in FIG. 7. 吸気マニフォルド内に設置されるバタフライ型開閉弁の底面図。The bottom view of the butterfly type on-off valve installed in the intake manifold. 同開閉弁の側面図。The side view of the on-off valve.

Ｅ・・・・・エンジン
Ｍ・・・・・吸気マニフォルド
Ｍ１・・・・吸気マニフォルドの第１ブロック
Ｍ２・・・・吸気マニフォルドの第２ブロック
１・・・・・取り付けフランジ部
４・・・・・短管部兼架橋部
５・・・・・タンク部
６・・・・・管路部
８・・・・・空気出口
９・・・・・導入路
１０・・・・サージ室
１３・・・・架橋部 E ... Engine M ... Intake manifold
M1 ... the first block of the intake manifold
M2 ······ Second block 1 of intake manifold 1 ··· Mounting flange portion 4 ··· Short pipe portion and bridge portion 5 ··· Tank portion 6 ··· Pipe portion 8 ... Air outlet 9 ... Introduction path 10 ... Surge chamber 13 ... Bridge

Claims (3)

多気筒エンジン（Ｅ）に複数の締結部材（２）により締結され、エンジン（Ｅ）の吸気ポートに連なる複数の空気出口（８）を有する取り付けフランジ部（１）と、前記締結部材（２）の装着経路を避けるように前記取り付けフランジ部（１）から離間して配置され、大気を導入するサージ室（１０）を有するタンク部（５）と、このタンク部（５）及び前記取り付けフランジ部（１）間に連結され、前記サージ室（１０）及び空気出口（８）間を連通する複数の吸気路（１１）を有する管路部（６）とからなり、前記取り付けフランジ部（１）及びタンク部（５）間に、その両端部同士を一体に連結する架橋部（４，１３）を設けた、合成樹脂製の吸気マニフォルドにおいて、
前記取り付けフランジ部（１）の一方の端部の外側に配置されてスロットルボディ（Ｔ）が取り付け可能な小フランジ部（３）から前記タンク部（５）に向かって延びる短管部（４）が、前記スロットルボディ（Ｔ）からの流入大気を前記サージ室（１０）に導入する導入路（９）を有すると共に、該短管部（４）と前記取り付けフランジ部（１）の一方の端部とが、その相互間の隔壁を共有するようにして一体に接続されており、
前記取り付けフランジ部（１）及び前記タンク部（５）の一方の端部同士を一体に連結する一方の前記架橋部が、前記短管部（４）で構成されることを特徴とする、合成樹脂製の吸気マニフォルド。 A mounting flange portion (1) fastened to the multi-cylinder engine (E) by a plurality of fastening members (2) and having a plurality of air outlets (8) connected to an intake port of the engine (E), and the fastening members (2) And a tank part (5) having a surge chamber (10) for introducing the atmosphere, spaced apart from the mounting flange part (1) so as to avoid the mounting path, and the tank part (5) and the mounting flange part (1) and a pipe line part (6) having a plurality of intake passages (11) communicating between the surge chamber (10) and the air outlet (8), the mounting flange part (1) And in the intake manifold made of synthetic resin, provided with a bridging portion (4, 13) that integrally connects the both end portions between the tank portion (5),
A short pipe portion (4) extending from one end portion of the mounting flange portion (1) to the tank portion (5) from a small flange portion (3) to which a throttle body (T) can be attached. Has an introduction path (9) for introducing air flowing in from the throttle body (T) into the surge chamber (10), and one end of the short pipe portion (4) and the mounting flange portion (1). Are connected together so as to share a partition wall between them,
Wherein the bridge portion one for connecting the ends together one of the mounting flange (1) and the tank (5), characterized in that is constituted the the short tube portion (4), synthetic Resin intake manifold. 請求項１記載の合成樹脂製の吸気マニフォルドにおいて、
前記取り付けフランジ部（１）及びタンク部（５）の他方の端部同士を一体に連結する他方の架橋部（１３）を、断面コ字状に形成したことを特徴とする、合成樹脂製の吸気マニフォルド。 In intake manifold made of synthetic resin according to claim 1,
The other bridging portion (13) that integrally connects the other end portions of the mounting flange portion (1) and the tank portion (5) is formed in a U-shaped cross section, and is made of a synthetic resin. Intake manifold. 少なくとも第１，第２ブロック（Ｍ１，Ｍ２）に分けられた、請求項１又は２記載の合成樹脂製の吸気マニフォルドであって、The intake manifold made of synthetic resin according to claim 1 or 2, wherein the intake manifold is divided into at least first and second blocks (M1, M2).
前記第１ブロック（Ｍ１）には、前記取り付けフランジ部（１）、前記短管部（４）の一半部、前記タンク部（５）の一半部及び前記管路部（６）の入口部が形成されることを特徴とする、合成樹脂製の吸気マニフォルド。The first block (M1) includes an attachment flange portion (1), a half portion of the short pipe portion (4), a half portion of the tank portion (5), and an inlet portion of the conduit portion (6). An intake manifold made of synthetic resin, characterized in that it is formed.
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Publication number Priority date Publication date Assignee Title
JP2004308585A (en) * 2003-04-08 2004-11-04 Aisan Ind Co Ltd Resin-made intake manifold
JP2004308506A (en) * 2003-04-04 2004-11-04 Aisan Ind Co Ltd Resin-made intake manifold

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004308506A (en) * 2003-04-04 2004-11-04 Aisan Ind Co Ltd Resin-made intake manifold
JP2004308585A (en) * 2003-04-08 2004-11-04 Aisan Ind Co Ltd Resin-made intake manifold

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