JP2016121672A

JP2016121672A - Exhaust pipe

Info

Publication number: JP2016121672A
Application number: JP2015039678A
Authority: JP
Inventors: 宏介青木; Kosuke Aoki; 昭博坂田; Akihiro Sakata; 鈴木　隆之; Takayuki Suzuki; 隆之鈴木
Original assignee: Daihatsu Motor Co Ltd
Current assignee: Daihatsu Motor Co Ltd
Priority date: 2014-12-25
Filing date: 2015-02-28
Publication date: 2016-07-07
Anticipated expiration: 2035-02-28
Also published as: JP6610854B2

Abstract

PROBLEM TO BE SOLVED: To provide an exhaust pipe which can generate a vortex flow with simple configuration.SOLUTION: A second exhaust which flows in a second exhaust pipe 103 in an arrow a103 direction is merged with a first emission which flows in a first exhaust pipe 101 in an arrow a101 direction at a joining part between the first exhaust pipe 101 and the second exhaust pipe 103. In a merging region R, a second center line J103 intersects with a first center line J101. In the merging region R, the second center line J103 passes through a position a distance d1 away from the first center line J101. By this constitution, the second exhaust can be merged with the first exhaust so as to be decentered with respect to the first exhaust in the merging region R. An air-fuel mixture of the first exhaust and the second exhaust flows along a side face of the first exhaust pipe 101, and as a result, a vortex flow C101 is formed.SELECTED DRAWING: Figure 1

Description

本発明は、排気管に関し、特に、複数の排気が合流するものに関する。 The present invention relates to an exhaust pipe, and more particularly, to a structure in which a plurality of exhaust gases merge.

従来の排気管について、図５に示す排気管のジョイント部を用いて説明する。従来の自動車及び二輪自動車の排気装置に用いるジョイント部は、自動車及び二輪自動車のエンジンに連通する上流側の複数のエキゾ−ストマニホ−ルド若しくは排気管と下流側の単一の排気管との間に介装されて、上流側から流入する排気ガス流を合流させて単一の排気ガス流にして下流側に流出させるジョイント部であって、複数の排気ガス流が、相互に平行で、ジョイント部から流出する排気ガス流と同一方向で内部に流入して合流し、その合流排気ガス流が回転しながら流出する構造を備えていること、を特徴とする。 A conventional exhaust pipe will be described with reference to a joint part of the exhaust pipe shown in FIG. The joint part used in the exhaust system of conventional automobiles and motorcycles is provided between a plurality of upstream exhaust manifolds or exhaust pipes communicating with the engines of automobiles and motorcycles and a single downstream exhaust pipe. Is a joint part that joins the exhaust gas flows that flow in from the upstream side into a single exhaust gas flow that flows to the downstream side, and a plurality of exhaust gas flows are parallel to each other, It is characterized in that it has a structure in which it flows into the inside in the same direction as the exhaust gas flow flowing out from the section and merges, and the combined exhaust gas flow flows out while rotating.

ジョイント部１は、鋳物による一体型の中空立体状物からなるもので、上流側からの排気ガス流を個々に流入・直進させる流入直進部（図５のハッチングを施した領域）２と、合流排気ガス流に回転を誘導して渦流にして下流の排気管に流出させる回転誘導部３とから構成されている（以上、特許文献１参照）。 The joint part 1 is made of an integral hollow three-dimensional object made of a casting, and is joined to an inflow straight part (a hatched area in FIG. 5) 2 for individually flowing in and going straight an exhaust gas flow from the upstream side. The rotation induction unit 3 is configured to induce rotation in the exhaust gas flow to be vortexed and flow out to the downstream exhaust pipe (see Patent Document 1 above).

特開２００４−２８５９１８号公報JP 2004-285918 A

前述の従来のジョイント部１には、以下に示すような改善すべき点がある。ジョイント部１では、渦状の回転誘導部３を複数形成し、それらを合流させる必要があるため、製造が難しく、コストもかかる、という改善すべき点がある。 The above-described conventional joint portion 1 has the following points to be improved. In the joint part 1, since it is necessary to form a plurality of spiral-shaped rotation induction parts 3 and join them together, there is a point to be improved that manufacturing is difficult and costly.

そこで、本発明は、簡易な構造で渦流を発生させることができる排気管を提供することを目的とする。 Accordingly, an object of the present invention is to provide an exhaust pipe that can generate a vortex with a simple structure.

本発明における課題を解決するための手段及び発明の効果を以下に示す。 Means for solving the problems in the present invention and the effects of the invention will be described below.

本発明に係る排気管は、第１の排気が流れ、前記第１の排気の流れに沿って第１の中心線を有する第１の排気管、第２の排気が流れ、前記第２の排気の流れに沿って第２の中心線を有する第２の排気管であって、前記第１の排気と前記第２の排気とが合流する合流領域において、前記第２の中心線が前記第１の中心線に対して距離を持って交差する第２の排気管、を有する。 In the exhaust pipe according to the present invention, the first exhaust flows, the first exhaust pipe having the first center line along the flow of the first exhaust, the second exhaust flows, and the second exhaust A second exhaust pipe having a second center line along the flow of the second exhaust pipe, wherein the second center line is the first exhaust line in the merge region where the first exhaust and the second exhaust join. A second exhaust pipe intersecting with a distance from the center line.

これにより、第１の排気及び第２の排気に対して簡易でコストがかからない構成で渦流を形成できる。 Thereby, a vortex | eddy_current can be formed with the structure which is simple and does not cost with respect to 1st exhaust_gas | exhaustion and 2nd exhaust_gas | exhaustion.

本発明に係る排気管では、前記第１の排気管は、前記合流領域より上流側に位置し、前記第１の排気の流れに偏りを形成する曲折部、を有し、前記第２の排気管は、前記合流領域において、前記第１の排気に対して、偏った側から前記第２の排気を合流させること、を特徴とする。 In the exhaust pipe according to the present invention, the first exhaust pipe has a bent portion that is located upstream of the merging region and forms a bias in the flow of the first exhaust, and the second exhaust pipe The pipe is characterized in that the second exhaust gas is merged from a biased side with respect to the first exhaust gas in the merge region.

これにより、流れに偏りが生じている第１の排気であっても、第１の排気及び第２の排気からなる混合気を容易に均一にできる。また、第１の排気に対して偏った側から第２の排気を合流させるので、容易に渦流とすることができる。 Thereby, even if it is the 1st exhaust_gas | exhaustion with which the flow has produced unevenness, the air-fuel | gaseous mixture which consists of 1st exhaust gas and 2nd exhaust gas can be made uniform easily. Further, since the second exhaust is merged from the side that is biased with respect to the first exhaust, a vortex can be easily formed.

本発明に係る排気管の一実施例である排気管１００の外観図である。1 is an external view of an exhaust pipe 100 that is an embodiment of an exhaust pipe according to the present invention. 第１の排気管１０１及び第２の排気管１０３の上面図である。3 is a top view of a first exhaust pipe 101 and a second exhaust pipe 103. FIG. 第１の排気管１０１及び第２の排気管１０３の合流領域Ｒにおける断面図である。3 is a cross-sectional view of a first exhaust pipe 101 and a second exhaust pipe 103 in a merged region R. FIG. 図３における第１の排気管１０１及び第２の排気管１０３の矢印ａ３方向から見た状態を示す図である。FIG. 4 is a diagram showing a state of the first exhaust pipe 101 and the second exhaust pipe 103 in FIG. 3 viewed from the direction of an arrow a3. 従来の排気管を示す図である。It is a figure which shows the conventional exhaust pipe. 本発明に係る排気管の一実施例である排気管２００の外観図である。It is an external view of the exhaust pipe 200 which is one Example of the exhaust pipe which concerns on this invention. 図６におけるＹ−Ｙ断面を示す図である。It is a figure which shows the YY cross section in FIG.

以下、本発明の実施例について、図面を参照しながら詳細に説明していく。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

本発明に係る排気管の一実施形態である自動車の排気管１００について以下において説明する。排気管１００は、所定の内燃機関のクランクシャフトに取り付けられ、内燃機関が発生する動力を他の装置、機構へ伝達する。 An exhaust pipe 100 for an automobile, which is an embodiment of the exhaust pipe according to the present invention, will be described below. The exhaust pipe 100 is attached to a crankshaft of a predetermined internal combustion engine, and transmits power generated by the internal combustion engine to other devices and mechanisms.

図１に、排気管１００の外観図を示す。図１に示すように、排気管１００は、第１の排気管１０１、第２の排気管１０３、第３の排気管１０５、及び、第４の排気管１０７を有している。 FIG. 1 shows an external view of the exhaust pipe 100. As shown in FIG. 1, the exhaust pipe 100 includes a first exhaust pipe 101, a second exhaust pipe 103, a third exhaust pipe 105, and a fourth exhaust pipe 107.

第１の排気管１０１には、第１の排気が、第１の吸気口Ｍ１０１から第１の排気口Ｎ１０１に向かう矢印ａ１０１方向に流れる。第１の排気管１０１は、第１の排気の流れに沿った第１の中心線Ｊ１０１を有している。 In the first exhaust pipe 101, the first exhaust flows in the direction of an arrow a101 from the first intake port M101 toward the first exhaust port N101. The first exhaust pipe 101 has a first center line J101 along the flow of the first exhaust.

第２の排気管１０３は、第１の排気管１０１に接合している。第２の排気管１０３には、第２の排気が、第２の吸気口Ｍ１０３から第２の排気口Ｎ１０３に向かう矢印ａ１０３方向に流れる。第２の排気管１０３は、第２の排気の流れに沿った第２の中心線Ｊ１０３を有している。なお、第２の排気口Ｎ１０３は、第２の排気管１０３と第１の排気管１０１との接合部に形成される。 The second exhaust pipe 103 is joined to the first exhaust pipe 101. In the second exhaust pipe 103, the second exhaust flows in the direction of the arrow a103 from the second intake port M103 toward the second exhaust port N103. The second exhaust pipe 103 has a second center line J103 along the flow of the second exhaust. The second exhaust port N103 is formed at the joint between the second exhaust pipe 103 and the first exhaust pipe 101.

第１の排気管１０１及び第２の排気管１０３の上面図を図２に示す。第２の排気管１０３を矢印ａ１０３方向に流れる第２の排気は、第１の排気管１０１と第２の排気管１０３との接合部において、第１の排気管１０１を矢印ａ１０１方向に流れる第１の排気と合流する。ここで、第１の排気管１０１において、第１の排気と第２の排気とが合流する領域を合流領域Ｒとする。合流領域Ｒにおいて、第２の中心線Ｊ１０３は第１の中心線Ｊ１０１と交差する。 A top view of the first exhaust pipe 101 and the second exhaust pipe 103 is shown in FIG. The second exhaust flowing through the second exhaust pipe 103 in the direction of the arrow a103 is the second exhaust flowing through the first exhaust pipe 101 in the direction of the arrow a101 at the junction between the first exhaust pipe 101 and the second exhaust pipe 103. Combined with the exhaust of 1. Here, in the first exhaust pipe 101, a region where the first exhaust and the second exhaust merge is referred to as a merge region R. In the merge area R, the second center line J103 intersects the first center line J101.

ここで、図２に示す第１の排気管１０１及び第２の排気管１０３における、第２の排気管１０３の第２の中心線Ｊ１０３に沿ったＸ−Ｘ断面を図３に示す。さらに、図３に示す断面の矢印ａ３方向から見た状態を図４に示す。図４に示すように、合流領域Ｒにおいて、第２の中心線Ｊ１０３は、第１の中心線Ｊ１０１に対して距離ｄ１の位置を通る。 Here, FIG. 3 shows an XX cross section along the second center line J103 of the second exhaust pipe 103 in the first exhaust pipe 101 and the second exhaust pipe 103 shown in FIG. Furthermore, the state seen from the direction of arrow a3 of the cross section shown in FIG. 3 is shown in FIG. As shown in FIG. 4, in the merging region R, the second center line J103 passes through a position of a distance d1 with respect to the first center line J101.

このように、第１の排気管１０１の第１の中心線Ｊ１０１と第２の排気管１０３の第２の中心線Ｊ１０３とを所定の距離をおいて交差するように第２の排気管１０３を第１の排気管１０１に接合することによって、合流領域Ｒにおいて、第１の排気に対して偏心するように第２の排気を第１の排気に合流させることができる。これにより、図２に示すように、合流領域Ｒにおいて、第１の排気Ｆ１０１に対して、第１の中心線Ｊ１０１に対して所定の角度αで第２の排気Ｆ１０３が加わるため、第１の排気は、第１の排気管１０１の側面に沿った流れを形成する。また、第２の排気も、第１の排気と同様に、第１の排気管１０１の側面に沿って流れる。つまり、第１の排気と第２の排気との混合気は、図１に示すように、第１の排気管１０１の側面に沿って流れ、結果として渦流Ｃ１０１を形成する。 In this way, the second exhaust pipe 103 is arranged so that the first center line J101 of the first exhaust pipe 101 and the second center line J103 of the second exhaust pipe 103 intersect at a predetermined distance. By joining to the first exhaust pipe 101, the second exhaust can be merged with the first exhaust so as to be eccentric with respect to the first exhaust in the merge region R. Accordingly, as shown in FIG. 2, in the merging region R, the second exhaust F103 is added to the first exhaust F101 at a predetermined angle α with respect to the first center line J101. The exhaust forms a flow along the side surface of the first exhaust pipe 101. Further, the second exhaust also flows along the side surface of the first exhaust pipe 101 in the same manner as the first exhaust. That is, the mixture of the first exhaust gas and the second exhaust gas flows along the side surface of the first exhaust pipe 101 as shown in FIG. 1, and as a result, a vortex C101 is formed.

これにより、簡易でコストがかからない構成で排気に対して渦流を形成することができる。また、第１の排気と第２の排気との混合気を、円滑に流すことができる。さらに、混合気の密度を一定にできるため、排気管１００の排気口Ｎ１０１側に、有害物質除去のための触媒を配置する場合、ムラなく混合気を触媒にあてることができる。なお、第３の排気管１０５及び第４の排気管１０７についても、第１の排気管１０１、第２の排気管１０３と同様である。 Thereby, a vortex | eddy_current can be formed with respect to exhaust_gas | exhaustion with the structure which is simple and does not cost. Moreover, the air-fuel mixture of the first exhaust gas and the second exhaust gas can flow smoothly. Furthermore, since the density of the air-fuel mixture can be made constant, when a catalyst for removing harmful substances is arranged on the exhaust port N101 side of the exhaust pipe 100, the air-fuel mixture can be applied to the catalyst without any unevenness. The third exhaust pipe 105 and the fourth exhaust pipe 107 are the same as the first exhaust pipe 101 and the second exhaust pipe 103.

前述の自動車の排気管１００では、第１の排気管１０１を流れる第１の排気には、偏りがあるものではなかった。一方、本実施例に係る排気管２００では、流れに偏りのある第１の排気であっても、第２の排気と合流させることによって、均一な混合気を形成し、容易に渦流を形成するものである。 In the above-described automobile exhaust pipe 100, the first exhaust gas flowing through the first exhaust pipe 101 is not biased. On the other hand, in the exhaust pipe 200 according to the present embodiment, even if the first exhaust is biased in flow, it is combined with the second exhaust to form a uniform mixture and easily form a vortex. Is.

図６に、排気管２００の外観図を示す。図６に示すように、排気管２００は、第１の排気管２０１、第２の排気管２０３、第３の排気管２０５、及び、第４の排気管２０７を有している。 FIG. 6 shows an external view of the exhaust pipe 200. As shown in FIG. 6, the exhaust pipe 200 includes a first exhaust pipe 201, a second exhaust pipe 203, a third exhaust pipe 205, and a fourth exhaust pipe 207.

第１の排気管２０１には、第１の排気が、第１の吸気口Ｍ２０１から第１の排気口Ｎ２０１に向かう矢印ａ２０１方向に流れる。第２の排気管２０１は、第１の排気の流れに沿った第１の中心線Ｊ２０１を有している。なお、第１の排気口Ｎ２０１は、触媒部ＣＴが有するガスコーン部Ｇとの接合部に形成される。なお、ガスコーン部Ｇとは、触媒部ＣＴの入口側に形成され、流路面積が徐々に拡大変動する部分をいう。 In the first exhaust pipe 201, the first exhaust flows in the direction of arrow a201 from the first intake port M201 toward the first exhaust port N201. The second exhaust pipe 201 has a first center line J201 along the flow of the first exhaust. In addition, the 1st exhaust port N201 is formed in a junction part with the gas cone part G which the catalyst part CT has. The gas cone portion G is a portion that is formed on the inlet side of the catalyst portion CT and the flow passage area gradually expands and varies.

第１の排気管２０１は、第２の排気管２０３と接合する前に、第１の排気の流れを大きく変動させる曲折部Ｄ２０１を有している。第１の排気は、曲折部Ｄ２０１を通過することによって、曲折部Ｄ２０１の外側に偏った偏心流を形成する。なお、第１の排気管２０１は、曲折部Ｄ２０１を通過した第１の排気が、第２の排気管２０３との接合部において、第２の排気が流れ込む側に偏った偏心流を形成するように形成されている。 The first exhaust pipe 201 has a bent portion D201 that greatly fluctuates the flow of the first exhaust before being joined to the second exhaust pipe 203. By passing through the bent portion D201, the first exhaust gas forms an eccentric flow that is biased to the outside of the bent portion D201. Note that the first exhaust pipe 201 forms an eccentric flow in which the first exhaust gas that has passed through the bent portion D201 is biased toward the side where the second exhaust gas flows at the joint portion with the second exhaust pipe 203. Is formed.

第２の排気管２０３は、第１の排気管２０１に接合している。第２の排気管２０３には、第２の排気が、第２の吸気口Ｍ２０３から第２の排気口Ｎ２０３に向かう矢印ａ２０３方向に流れる。第２の排気管２０３は、第２の排気の流れに沿った第２の中心線Ｊ２０３を有している。なお、第２の排気口Ｎ２０３は、第２の排気管２０３と第１の排気管２０１との接合部に形成される。 The second exhaust pipe 203 is joined to the first exhaust pipe 201. In the second exhaust pipe 203, the second exhaust flows in the direction of the arrow a203 from the second intake port M203 toward the second exhaust port N203. The second exhaust pipe 203 has a second center line J203 along the flow of the second exhaust. The second exhaust port N203 is formed at the joint between the second exhaust pipe 203 and the first exhaust pipe 201.

第２の排気管２０３を矢印ａ２０３方向に流れる第２の排気は、第１の排気管２０１と第２の排気管２０３との接合部において、第１の排気管２０１を矢印ａ２０１方向に流れる第１の排気と合流する。ここで、第１の排気管２０１において、第１の排気と第２の排気とが合流する領域を合流領域Ｒとする。合流領域Ｒにおいて、第２の中心線Ｊ２０３は第１の中心線Ｊ２０１と交差する。 The second exhaust gas flowing through the second exhaust pipe 203 in the direction of the arrow a203 is the second exhaust gas flowing through the first exhaust pipe 201 in the direction of the arrow a201 at the junction between the first exhaust pipe 201 and the second exhaust pipe 203. Combined with the exhaust of 1. Here, in the first exhaust pipe 201, a region where the first exhaust and the second exhaust merge is referred to as a merge region R. In the merge area R, the second center line J203 intersects the first center line J201.

ここで、図６に示す合流領域Ｒにおける第１の排気管１０１及び第２の排気管１０３のＹ−Ｙ断面を図７に示す。図７に示すように、合流領域Ｒにおいて、第２の中心線Ｊ２０３は、第１の中心線Ｊ２０１に対して距離ｄ２の位置を通る。また、第２の排気は、合流領域Ｒにおいて、第２の排気が流れ込む側、つまり水平方向側に偏った偏心流を形成する第１の排気（斜線部）に対して、垂直側に偏った位置から合流する。 Here, FIG. 7 shows a YY cross section of the first exhaust pipe 101 and the second exhaust pipe 103 in the merge region R shown in FIG. As shown in FIG. 7, in the merging region R, the second center line J203 passes through a position of a distance d2 with respect to the first center line J201. Further, the second exhaust is biased in the vertical direction with respect to the first exhaust (shaded portion) that forms an eccentric flow that is biased toward the side where the second exhaust flows, that is, in the horizontal direction, in the merging region R. Merge from position.

このように、第１の排気管１０１の第１の中心線Ｊ１０１と第２の排気管１０３の第２の中心線Ｊ１０３とを所定の距離をおいて交差するように第２の排気管１０３を第１の排気管１０１に接合することによって、合流領域Ｒにおいて、偏心流である第１の排気に対して、偏心するように第２の排気を第１の排気に合流させることができる。これにより、第１の排気及び第２の排気は、第１の排気管２０１の側面に沿った流れを形成する。そして、第１の排気と第２の排気との混合気は、図６に示すように、触媒部ＣＴのガスコーン部Ｇにおいて、ガスコーン部Ｇの側面に沿った渦流Ｃ２０１を形成する。 In this way, the second exhaust pipe 103 is arranged so that the first center line J101 of the first exhaust pipe 101 and the second center line J103 of the second exhaust pipe 103 intersect at a predetermined distance. By joining to the first exhaust pipe 101, the second exhaust can be merged with the first exhaust so as to be eccentric with respect to the first exhaust which is the eccentric flow in the merge region R. Thereby, the first exhaust and the second exhaust form a flow along the side surface of the first exhaust pipe 201. Then, the mixture of the first exhaust gas and the second exhaust gas forms a vortex C201 along the side surface of the gas cone portion G in the gas cone portion G of the catalyst portion CT as shown in FIG.

これにより、簡易でコストがかからない構成で排気に対して渦流を形成することができる。また、第１の排気が偏心流であっても、第１の排気と第２の排気との混合気を、円滑に流すことができる。さらに、第１の排気が偏心流であっても、混合気の密度を一定にできるため、排気管２００の第１の排気口Ｎ２０１側に、有害物質除去のための触媒部ＣＴを配置する場合、ムラなく混合気を触媒部ＣＴに流すことができる。 Thereby, a vortex | eddy_current can be formed with respect to exhaust_gas | exhaustion with the structure which is simple and does not cost. Moreover, even if the first exhaust gas is an eccentric flow, the air-fuel mixture of the first exhaust gas and the second exhaust gas can flow smoothly. Furthermore, even when the first exhaust is an eccentric flow, since the density of the air-fuel mixture can be made constant, a catalyst part CT for removing harmful substances is disposed on the first exhaust port N201 side of the exhaust pipe 200. Thus, the air-fuel mixture can flow through the catalyst portion CT without any unevenness.

［他の実施例］
（１）排気管１００の構成：前述の実施例１においては、排気管１００を、第１の排気管１０１〜第４の排気管１０７によって形成するとしたが、複数の排気を合流させるものであれば、例示のものに限定されない。例えば、第１の排気管１０１と第２の排気管１０３とを合流させた後、さらに、第３の排気管１０５、第４の排気管１０７を合流させるようにしてもよい。実施例における排気管２００についても同様である。 [Other embodiments]
(1) Configuration of exhaust pipe 100: In the first embodiment described above, the exhaust pipe 100 is formed by the first exhaust pipe 101 to the fourth exhaust pipe 107. For example, it is not limited to the example. For example, after the first exhaust pipe 101 and the second exhaust pipe 103 are merged, the third exhaust pipe 105 and the fourth exhaust pipe 107 may be merged. The same applies to the exhaust pipe 200 in the embodiment.

本発明に係る排気管は、例えば、自動車のエキゾースト・マニホールドとして用いられる。 The exhaust pipe according to the present invention is used, for example, as an exhaust manifold of an automobile.

１００排気管
１０１第１の排気管
Ｊ１０１第１の中心線
１０３第２の排気管
Ｊ１０３第２の中心線
１０５第３の排気管
１０７第４の排気管
２００排気管
２０１第１の排気管
Ｊ２０１第１の中心線
２０３第２の排気管
Ｊ２０３第２の中心線
Ｄ２０１曲折部 100 exhaust pipe 101 first exhaust pipe J101 first center line 103 second exhaust pipe J103 second center line 105 third exhaust pipe 107 fourth exhaust pipe 200 exhaust pipe 201 first exhaust pipe J201 first 1 center line 203 2nd exhaust pipe J203 2nd center line D201 Bending part

Claims

A first exhaust pipe having a first center line along the flow of the first exhaust,
A second exhaust pipe having a second center line along a flow of the second exhaust and having a second center line, where the first exhaust and the second exhaust merge. A second exhaust pipe intersecting the second center line with a distance from the first center line;
Having an exhaust pipe.

In the exhaust pipe according to claim 1,
The first exhaust pipe is
A bent portion that is located upstream from the merge region and forms a bias in the flow of the first exhaust,
Have
The second exhaust pipe is
Merging the second exhaust from a biased side with respect to the first exhaust in the merging region;
An exhaust pipe characterized by.