JPH081638U - Engine exhaust pipe structure - Google Patents

Engine exhaust pipe structure

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Publication number
JPH081638U
JPH081638U JP003010U JP301096U JPH081638U JP H081638 U JPH081638 U JP H081638U JP 003010 U JP003010 U JP 003010U JP 301096 U JP301096 U JP 301096U JP H081638 U JPH081638 U JP H081638U
Authority
JP
Japan
Prior art keywords
exhaust pipe
connecting cylinder
end side
exhaust
collecting portion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP003010U
Other languages
Japanese (ja)
Other versions
JP2543434Y2 (en
Inventor
隆行 田中
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mazda Motor Corp
Original Assignee
Mazda Motor Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mazda Motor Corp filed Critical Mazda Motor Corp
Priority to JP1996003010U priority Critical patent/JP2543434Y2/en
Publication of JPH081638U publication Critical patent/JPH081638U/en
Application granted granted Critical
Publication of JP2543434Y2 publication Critical patent/JP2543434Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

(57)【要約】 【課題】 排気管接続の自由度を高めるエンジンの排気
管構造を提供する。 【解決手段】 複数の上流側排気管が集合されて排気管
集合部2が形成されており、その排気管集合部2は接続
筒3に、該接続筒3の一端側において嵌合保持されてい
る。この場合、排気管集合部2と接続筒3の一端側との
嵌合部は断面円形とされている。一方、接続筒3の他端
側には下流側排気管7が保持されており、その接続筒3
の他端側は、その軸心O1 が該接続筒3の一端側の軸心
2 に対して傾斜されている。これにより、組付け時に
おいて、排気管集合部2に対して接続筒3の一端側にお
ける軸心O2 を中心として回動させることによって、そ
の回動に応じて接続筒3の他端面の向き及び位置を変更
し、排気管接続の自由度を高める。
(57) Abstract: To provide an exhaust pipe structure of an engine which enhances the degree of freedom in connecting exhaust pipes. SOLUTION: A plurality of upstream side exhaust pipes are assembled to form an exhaust pipe collecting portion 2, and the exhaust pipe collecting portion 2 is fitted and held in a connecting cylinder 3 at one end side of the connecting cylinder 3. There is. In this case, the fitting portion between the exhaust pipe collecting portion 2 and the one end side of the connecting cylinder 3 has a circular cross section. On the other hand, a downstream side exhaust pipe 7 is held at the other end of the connecting tube 3 and the connecting tube 3
On the other end side, the axis O 1 is inclined with respect to the axis O 2 on the one end side of the connecting cylinder 3. As a result, at the time of assembly, by rotating the exhaust pipe collecting portion 2 about the axis O 2 on one end side of the connecting cylinder 3, the other end surface of the connecting cylinder 3 is oriented according to the rotation. And change the position to increase the degree of freedom in connecting the exhaust pipe.

Description

【考案の詳細な説明】[Detailed description of the device]

【0001】[0001]

【考案の属する技術分野】[Technical field to which the device belongs]

本考案はエンジンの排気管構造に関する。 The present invention relates to an exhaust pipe structure of an engine.

【0002】[0002]

【従来の技術】[Prior art]

エンジンの排気管構造には、実開昭60−3226号公報に示すように、複数 の上流側排気管が集合された排気管集合部を真直ぐな円筒状の接続筒に、該接続 筒の一端側において嵌合保持し、該接続筒の他端側に下流側排気管を接続したも のがある。 これにより、複数の上流側排気管は接続筒を介して一本の下流側排気管に接続 されることになる。 In the exhaust pipe structure of an engine, as shown in Japanese Utility Model Laid-Open No. 60-3226, an exhaust pipe collecting portion in which a plurality of exhaust pipes on the upstream side are assembled is connected to a straight cylindrical connecting pipe, and one end of the connecting pipe There is one in which the downstream side exhaust pipe is connected to the other end side of the connecting cylinder. As a result, the plurality of upstream side exhaust pipes are connected to one downstream side exhaust pipe via the connecting tube.

【0003】[0003]

【考案が解決しようとする課題】[Problems to be solved by the device]

しかし、上記エンジンの排気管構造においては、前記接続筒が真直ぐな円筒状 であることから、接続筒の一端側及び他端側における軸心が一致しており、該接 続筒の一端側を排気管集合部に嵌合すれば、自ずと該接続筒の他端側における他 端面の向きと位置とが決まることになり、接続筒を排気管集合部に対して相対回 動させようとも、該接続筒の他端面における向き・位置を変えることがてきない 。このため、組付時において、排気管集合部に対して下流側排気管の配置を変更 したいような場合であっても、上記構造にあってはそのような場合に対処するこ とはできなかった。 However, in the above engine exhaust pipe structure, since the connecting cylinder has a straight cylindrical shape, the axial centers on one end side and the other end side of the connecting cylinder are aligned, and one end side of the connecting cylinder is When fitted to the exhaust pipe collecting portion, the direction and position of the other end surface on the other end side of the connecting pipe are automatically determined, and even if the connecting pipe is rotated relative to the exhaust pipe collecting portion, The orientation and position of the other end of the connecting tube cannot be changed. Therefore, even when it is desired to change the layout of the downstream exhaust pipe with respect to the exhaust pipe collecting portion during assembly, the above structure cannot handle such a case. It was

【0004】 本考案は上記実情に鑑みてなされたもので、その目的は、排気管接続の自由度 を高めるエンジンの排気管構造を提供することにある。The present invention has been made in view of the above circumstances, and an object thereof is to provide an exhaust pipe structure of an engine that enhances the degree of freedom in connecting exhaust pipes.

【0005】[0005]

【課題を解決するための手段】[Means for Solving the Problems]

かかる目的を達成するために請求項1の考案にあっては、 複数の上流側排気管を集合させて形成された排気管集合部が接続筒に、該接続 筒の一端側において嵌合保持され、該接続筒の他端側に下流側排気管が保持され ているエンジンの排気管構造において、 前記排気管集合部と前記接続筒の一端側との嵌合部を断面円形とするとともに 、 前記接続筒の他端側を、その軸心が該接続筒の一端側の軸心に対して傾斜する ように形成して、 前記接続筒の前記排気管集合部に対する回動位置の設定と前記傾斜とによって 、該接続筒の他端側向き及び位置を前記下流側排気管に対応するようにする、構 成としてある。 In order to achieve such an object, in the invention of claim 1, an exhaust pipe collecting portion formed by collecting a plurality of upstream exhaust pipes is fitted and held in a connecting cylinder at one end side of the connecting cylinder. An exhaust pipe structure of an engine in which a downstream exhaust pipe is held at the other end of the connecting pipe, the fitting portion between the exhaust pipe collecting portion and one end of the connecting pipe has a circular cross section, and The other end side of the connecting tube is formed so that its axis is inclined with respect to the axial center of one end side of the connecting tube, and the rotational position of the connecting tube with respect to the exhaust pipe collecting portion and the inclination thereof are set. By so doing, the direction and position of the other end of the connecting cylinder correspond to the downstream exhaust pipe.

【0006】[0006]

【考案の効果】[Effect of device]

請求項1の考案によれば、組付時において、排気管集合部に対して接続筒の一 端側を該接続筒の一端側における軸心を中心として回動させれば、その回動に応 じて接続筒の他端面の向き及び位置が変更されることになることから、組付けに 際し、下流側排気管の配置を変更することができることになり、排気管接続の自 由度を高めることができる。 According to the invention of claim 1, at the time of assembling, if one end side of the connecting cylinder is rotated with respect to the axial center at one end side of the connecting cylinder with respect to the exhaust pipe collecting portion, the rotation can be performed. Accordingly, the orientation and position of the other end surface of the connecting tube will be changed, so the layout of the downstream side exhaust pipe can be changed during assembly, and the degree of freedom of exhaust pipe connection can be improved. Can be increased.

【0007】[0007]

【考案の実施の形態】[Embodiment of device]

以下、本考案の実施形態を図面に基づいて説明する。 図l〜図5において、1は複数(本実施形態においては4本)の排気管として の鋼管製エキゾ−ストマニホールドである。この各エキゾーストマニホールド1 は、その一端側が各シリンダの排気口に接続されており、その各エキゾーストマ ニホールドlの他端側は集合されて排気管集合部2を形成している。この排気管 集合部2は、図2に示すように断面円形とされ、その排気管集台部2の端面は、 各エキゾーストマニホールドl間においてガス漏れが生じないように溶接されて いる。 Embodiments of the present invention will be described below with reference to the drawings. 1 to 5, reference numeral 1 denotes a steel pipe-made exhaust manifold as a plurality of (four in the present embodiment) exhaust pipes. One end of each exhaust manifold 1 is connected to the exhaust port of each cylinder, and the other end of each exhaust manifold 1 is collected to form an exhaust pipe collecting portion 2. As shown in FIG. 2, the exhaust pipe collecting portion 2 has a circular cross section, and the end surface of the exhaust pipe collecting portion 2 is welded between the exhaust manifolds 1 so that gas leakage does not occur.

【0008】 前記排気管集合部2には筒状3の接続筒3が、該接続筒3の一端側において嵌 合され、その接続筒3の一端側と排気管集合部2とは溶接により固定されている 。この接続筒3は、その一端側(図3図中、左側)内径が該接続筒3の他端側( 図3中、右側)内径よりも拡径されており、該接続筒3の一端側及び他端側の外 ・内径は、断面円形とされている。この接続筒3の他端側は、その軸心O1 が該 接続筒3の一端側における軸心02 に対して所定角度θ(本実施形態においては 15度)をもって傾斜するように形成されており、接続筒3の一端面3aの向き と該接続筒3の他端面3bの向きとは異なっている。この接続筒3の中央部外側 面には平坦面4が形成されており、この平坦面4には酸素センサ取付用ボス部5 が突設されている。このような接続筒3は、図4に示すような分割部品(一方の みを示す)を溶接によって一体化することにより形成される。A connecting pipe 3 having a tubular shape 3 is fitted to the exhaust pipe collecting portion 2 at one end side of the connecting pipe 3, and the one end side of the connecting pipe 3 and the exhaust pipe collecting portion 2 are fixed by welding. Has been. The inner diameter of one end side (left side in FIG. 3) of the connecting cylinder 3 is made larger than the inner diameter of the other end side (right side in FIG. 3) of the connecting cylinder 3, and one end side of the connecting cylinder 3 The outer and inner diameters of the other end are circular in cross section. The other end side of the connecting cylinder 3 is formed such that its axis O 1 is inclined at a predetermined angle θ (15 degrees in the present embodiment) with respect to the axis 0 2 on one end side of the connecting cylinder 3. That is, the direction of the one end surface 3a of the connecting cylinder 3 and the direction of the other end surface 3b of the connecting cylinder 3 are different. A flat surface 4 is formed on the outer surface of the central portion of the connection tube 3, and an oxygen sensor mounting boss portion 5 is provided on the flat surface 4. Such a connecting tube 3 is formed by integrating divided parts (only one of which is shown) as shown in FIG. 4 by welding.

【0009】 この接続筒3の他端側外周には内周が断面円形のフランジ6が軸心O1 を中心 として任意の向きに嵌合され、その接続筒3の他端側外周とフランジ6とは溶接 により固定されており、このフランジ6には下流側排気管7が接続される。 前記ボス部5には、接続筒3内に開口する取付孔8が形成されており、その取 付孔8内周には雌ねじが刻設されている。この取付孔8には酸素センサ9が、そ の外表面に形成された雄ねじ9aと取付孔8の雌ねじとを螺合させることにより 固定されている。この場合、酸素センサ9の雄ねじ9aが、ボス部5から接続筒 3内に入らないようにボス部5の高さhが設定されている。これにより、酸素セ ンサ9がねじ部の焼付きにより取外し困難となることが解消されることとなって いる。A flange 6 having an inner circumference of a circular cross section is fitted to the outer circumference of the other end side of the connecting cylinder 3 in an arbitrary direction around the axis O 1 , and the outer circumference of the other end side of the connecting cylinder 3 and the flange 6 are fitted. Are fixed by welding, and a downstream side exhaust pipe 7 is connected to this flange 6. A mounting hole 8 that opens into the connection cylinder 3 is formed in the boss portion 5, and a female screw is engraved on the inner periphery of the mounting hole 8. An oxygen sensor 9 is fixed in the mounting hole 8 by screwing a male screw 9a formed on the outer surface of the oxygen sensor 9 into a female screw of the mounting hole 8. In this case, the height h of the boss portion 5 is set so that the male screw 9a of the oxygen sensor 9 does not enter the connecting cylinder 3 from the boss portion 5. This prevents the oxygen sensor 9 from becoming difficult to remove due to seizure of the threaded portion.

【0010】 したがって、上記排気管構造にあっては、溶接前の組付けに際して、排気管集 合部2に接続筒3の一端側を嵌合し、該接続筒3を排気管集合部2に対して相対 回動させれば、前記軸心O1 と02 の方向が異なることから、接続筒3の他端面 3bの中心点P1 は軸心02 を中心として回動することになり、接続筒3の他端 面3bは、軸心02 を中心とした回動に応じて向き及び位置が変更できることに なる。これにより、下流側排気管7の配設構造も種々変えることができることに なり、下流側排気管構造の自由度を高めることができることになる。また、フラ ンジの向き・位置を下流側排気管7に対応させることも容易となる。Therefore, in the above exhaust pipe structure, at the time of assembly before welding, one end side of the connecting pipe 3 is fitted to the exhaust pipe collecting portion 2 and the connecting pipe 3 is attached to the exhaust pipe collecting portion 2. If they are rotated relative to each other, the directions of the axes O 1 and 0 2 are different, so that the center point P 1 of the other end face 3b of the connecting cylinder 3 rotates about the axis O 2. The direction and position of the other end surface 3b of the connecting tube 3 can be changed according to the rotation about the axis 0 2 . As a result, the arrangement structure of the downstream side exhaust pipe 7 can be variously changed, and the degree of freedom of the downstream side exhaust pipe structure can be increased. Further, it becomes easy to make the direction and position of the flange correspond to the downstream side exhaust pipe 7.

【0011】 また、接続筒3とフランジ6においても、その溶接前に軸心O1 を中心として 回動できるため、フランジ6の下流側排気管7へのネジ穴を軸心O1 に対して任 意の位置に設定して溶接することもできる。その結果、下流側排気管の位置は2 つの軸心O1 、02 を中心とした回動位置に設定できることとなり、下流側排気 管が湾曲している場合などさらに下流側排気管構造の自由度を広げることができ る。Further, since the connecting cylinder 3 and the flange 6 can also be rotated about the shaft center O 1 before welding, the screw hole of the flange 6 to the downstream side exhaust pipe 7 is formed with respect to the shaft center O 1 . It can also be set in any position and welded. As a result, the position of the downstream side exhaust pipe can be set to a rotational position around the two shaft centers O 1 and 0 2 , so that the downstream side exhaust pipe structure can be further freed when the downstream side exhaust pipe is curved. The degree can be expanded.

【0012】 図6〜図8は他の実施形態を示すもので、前記実施形態と同一構成要素につい ては同一符号を付してその説明を省酪する。 この実施形態は、各エキゾーストマニホールド1の他端側(下流端側)をジョ イントl0内に嵌合保持して該ジョイントl0を排気管集合部2としたものであ る。すなわち、このジョイントl0は、その一端側内周が各エキゾーストマニホ ールドlの他端側を集合させて一体化された部分の断面形状に対応しており、そ のジョイント10の一端側内周に上記各エキゾーストマニホールドlの一体化部 分が嵌合され、ジョイントl0と各エキゾーストマニホールドlの一体化部分は 溶接等により固定されている。一方、ジョイント10の他端側内周は接続筒3の 断面に対応して断面円形とされており、その他端側内周に接続筒3の一端側外周 が嵌合保持される。これにより、上記各エキゾーストマニホールドlの一体化部 分を完全に円形にしなくても、組付けに際して、ジョイントl0によって接続筒 3に対する相対回動を円滑に行なうことができることになる。FIG. 6 to FIG. 8 show another embodiment. The same components as those in the above embodiment are designated by the same reference numerals, and the description thereof will be omitted. In this embodiment, the other end side (downstream end side) of each exhaust manifold 1 is fitted and held in the joint 10 and the joint 10 is used as the exhaust pipe collecting portion 2. That is, this joint 10 corresponds to the cross-sectional shape of the portion where the inner circumference on one end side is integrated by assembling the other end side of each exhaust manifold 1, and the inner circumference on one end side of the joint 10 The integrated portion of each exhaust manifold 1 is fitted, and the integrated portion of the joint 10 and each exhaust manifold 1 is fixed by welding or the like. On the other hand, the inner circumference on the other end side of the joint 10 has a circular cross section corresponding to the cross section of the connecting cylinder 3, and the outer circumference on one end side of the connecting cylinder 3 is fitted and held on the inner circumference on the other end side. As a result, even if the integrated portion of each of the exhaust manifolds 1 is not completely circular, the joint 10 can smoothly rotate the joint 10 relative to the connecting cylinder 3.

【図面の簡単な説明】[Brief description of drawings]

【図1】本考案に係る排気管構造を示す斜視図。FIG. 1 is a perspective view showing an exhaust pipe structure according to the present invention.

【図2】排気管集合部の端面を示す図。FIG. 2 is a view showing an end face of an exhaust pipe collecting part.

【図3】接続筒を示す説明図。FIG. 3 is an explanatory view showing a connecting tube.

【図4】接続筒の構成部品を示す正面図。FIG. 4 is a front view showing components of the connection tube.

【図5】接続筒に酸素センサを取付けた場合を示す断面
図。
FIG. 5 is a cross-sectional view showing a case where an oxygen sensor is attached to a connection cylinder.

【図6】エキゾーストマニホ−ルドとジョイントと接続
筒との関係を示す拡大図。
FIG. 6 is an enlarged view showing a relationship between an exhaust manifold, a joint, and a connection cylinder.

【図7】図6のA一A線断面図。FIG. 7 is a sectional view taken along line AA of FIG. 6;

【図8】ジョイントの一端側端面を示す図。FIG. 8 is a view showing an end face on one end side of the joint.

【符号の説明】[Explanation of symbols]

l:エキゾーストマニホールド 2:排気管集合部 3:接続筒 7:下流側排気管 O1 :軸心 02 :軸心l: exhaust manifold 2: exhaust pipe gathering portion 3: Connection tube 7: downstream exhaust pipe O 1: axis 0 2: axis

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 【請求項1】 複数の上流側排気管を集合させて形成さ
れた排気管集合部が接続筒に、該接続筒の一端側におい
て嵌合保持され、該接続筒の他端側に下流側排気管が保
持されているエンジンの排気管構造において、 前記排気管集合部と前記接続筒の一端側との嵌合部を断
面円形とするとともに、 前記接続筒の他端側を、その軸心が該接続筒の一端側の
軸心に対して傾斜するように形成して、 前記接続筒の前記排気管集合部に対する回動位置の設定
と前記傾斜とによって、該接続筒の他端側向き及び位置
を前記下流側排気管に対応するようにする、ことを特徴
とするエンジンの排気管構造。
An exhaust pipe assembly formed by assembling a plurality of upstream exhaust pipes is fitted and held in a connecting cylinder at one end of the connecting cylinder, and a downstream exhaust pipe is attached to the other end of the connecting cylinder. In an exhaust pipe structure of an engine in which a pipe is held, a fitting portion between the exhaust pipe collecting portion and one end of the connection tube has a circular cross section, and the other end of the connection tube has an axial center. It is formed so as to be inclined with respect to the axis of one end of the connection cylinder, and by setting the rotation position and the inclination of the connection cylinder with respect to the exhaust pipe assembly, the other end of the connection cylinder and An exhaust pipe structure for an engine, wherein a position corresponds to the downstream exhaust pipe.
JP1996003010U 1996-04-15 1996-04-15 Engine exhaust pipe structure Expired - Lifetime JP2543434Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1996003010U JP2543434Y2 (en) 1996-04-15 1996-04-15 Engine exhaust pipe structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1996003010U JP2543434Y2 (en) 1996-04-15 1996-04-15 Engine exhaust pipe structure

Publications (2)

Publication Number Publication Date
JPH081638U true JPH081638U (en) 1996-12-03
JP2543434Y2 JP2543434Y2 (en) 1997-08-06

Family

ID=17892813

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1996003010U Expired - Lifetime JP2543434Y2 (en) 1996-04-15 1996-04-15 Engine exhaust pipe structure

Country Status (1)

Country Link
JP (1) JP2543434Y2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009127604A (en) * 2007-11-28 2009-06-11 Sankei Giken Kogyo Co Ltd Catalyst converter and manufacturing method thereof

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6259715B2 (en) * 1978-08-03 1987-12-12 Ansuchi* Intern Do Pasorojii Seryureeru E Morekyuuru

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6259715B2 (en) * 1978-08-03 1987-12-12 Ansuchi* Intern Do Pasorojii Seryureeru E Morekyuuru

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009127604A (en) * 2007-11-28 2009-06-11 Sankei Giken Kogyo Co Ltd Catalyst converter and manufacturing method thereof

Also Published As

Publication number Publication date
JP2543434Y2 (en) 1997-08-06

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