JP2011190752A - Exhaust manifold - Google Patents

Exhaust manifold Download PDF

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Publication number
JP2011190752A
JP2011190752A JP2010057720A JP2010057720A JP2011190752A JP 2011190752 A JP2011190752 A JP 2011190752A JP 2010057720 A JP2010057720 A JP 2010057720A JP 2010057720 A JP2010057720 A JP 2010057720A JP 2011190752 A JP2011190752 A JP 2011190752A
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Prior art keywords
outer shell
shell member
exhaust
water
cooling water
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JP2010057720A
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Japanese (ja)
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Hirohisa Ogami
裕久 大上
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Futaba Industrial Co Ltd
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Futaba Industrial Co Ltd
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Priority to JP2010057720A priority Critical patent/JP2011190752A/en
Priority to PCT/JP2011/056047 priority patent/WO2011115108A1/en
Publication of JP2011190752A publication Critical patent/JP2011190752A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/04—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust using liquids
    • F01N3/043—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust using liquids without contact between liquid and exhaust gases
    • F01N3/046—Exhaust manifolds with cooling jacket
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1861—Construction facilitating manufacture, assembly, or disassembly the assembly using parts formed by casting or moulding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1872—Construction facilitating manufacture, assembly, or disassembly the assembly using stamp-formed parts or otherwise deformed sheet-metal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2450/00—Methods or apparatus for fitting, inserting or repairing different elements
    • F01N2450/22—Methods or apparatus for fitting, inserting or repairing different elements by welding or brazing
    • 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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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide an exhaust manifold achieving a reduction in weight and having less risk of water leakage, by a simple structure. <P>SOLUTION: This exhaust manifold includes: a large flange 4 formed with introduction holes 6-8 corresponding to exhaust ports and attached to an internal combustion engine 100; and an outer shell member 16 provided with an exhaust chamber 36 communicating with the introduction holes 6-8 and formed along the longitudinal direction of the large flange 4. A water-cooled jacket 38 having a substantially U-shaped cross-sectional surface is attached to the outer wall of the outer shell member 16, and a cooling water flow passage 42 is formed between the outer wall of the outer shell member 16 and the water-cooled jacket 38. Protrusions 48, 50 controlling the flow of the cooling water in the cooling water flow passage are formed on the outer wall of the outer shell member 16. The outer shell member 16 is formed with an inner stepped portion 40 for fitting the water-cooled jacket 38, and the water-cooled jacket 38 is attached to the outer shell member 16. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、内燃機関の排気ポートからの排気を集合して排気管に送るエギゾーストマニホルドに関する。   The present invention relates to an exhaust manifold that collects exhaust gas from an exhaust port of an internal combustion engine and sends the exhaust gas to an exhaust pipe.

従来より、エギゾーストマニホルドの下流側には排気を浄化する触媒が設けられているが、触媒内では化学反応により発熱しており、触媒に担持されている貴金属は９５０度以上で長時間晒されると粗大化して、その結果、排気に触れる表面積が減少し、浄化性能が低下する原因になる。そこで、エキゾーストマニホルドを冷却して、排気温度を下げるようにしたものが知られている。   Conventionally, a catalyst for purifying exhaust gas has been provided on the downstream side of the exhaust manifold, but heat is generated by a chemical reaction in the catalyst, and the noble metal supported on the catalyst is exposed to 950 degrees or more for a long time. As a result, the surface area that comes into contact with the exhaust gas is reduced and the purification performance is deteriorated. In view of this, an exhaust manifold is cooled to lower the exhaust temperature.

例えば、特許文献１にあるように、排気導入管、排気分岐管、及び排気合流管を連結して排気通路を形成し、排気通路のほぼ全体を外部カバーで覆って、外部カバーと排気通路との間の空間に冷却水室を形成したものが提案されている。   For example, as disclosed in Patent Document 1, an exhaust introduction pipe, an exhaust branch pipe, and an exhaust merging pipe are connected to form an exhaust passage, and almost the entire exhaust passage is covered with an external cover, and the external cover and the exhaust passage are The thing which formed the cooling water chamber in the space between is proposed.

特開２００２−３３９７２６号公報JP 2002-339726 A

しかしながら、こうした従来のものでは、排気導入管、排気分岐管、及び排気合流管を溶接により連結して排気通路を形成すると共に、外部カバーが箱状に形成されて、排気通路が外側カバー内に収納されて形成されているので、構造が複雑で部品点数が多く、溶接箇所が多いので水漏れのおそれがあり、冷却水室の容積が大きいので多くの冷却水を必要し重量が増加するという問題があった。   However, in such a conventional one, the exhaust introduction pipe, the exhaust branch pipe, and the exhaust junction pipe are connected by welding to form an exhaust passage, and the outer cover is formed in a box shape, and the exhaust passage is in the outer cover. Since it is housed and formed, the structure is complicated, the number of parts is large, and there are many welding points, so there is a risk of water leakage, and the volume of the cooling water chamber is large, so that a lot of cooling water is required and the weight increases. There was a problem.

本発明の課題は、簡単な構造で、軽量化できると共に、水漏れのおそれが少ないエギゾーストマニホルドを提供することにある。   An object of the present invention is to provide an exhaust manifold that has a simple structure, can be reduced in weight, and has a low risk of water leakage.

かかる課題を達成すべく、本発明は課題を解決するため次の手段を取った。即ち、
内燃機関の各排気ポートからの排気を集合して排気管に送るエギゾーストマニホルドにおいて、
前記各排気ポートに対応した各導入孔が形成され前記内燃機関に取り付けられる大フランジと、
前記各導入孔に連通する排気室が前記大フランジの長手方向に沿って形成された外殻部材とを備え、
また、前記外殻部材の外壁に断面略Ｕ字状の水冷ジャケットを取り付けて、前記外殻部材の前記外壁と前記水冷ジャケットとの間に冷却水流路を形成したことを特徴とするエギゾーストマニホルドがそれである。 In order to achieve this problem, the present invention has taken the following measures in order to solve the problem. That is,
In the exhaust manifold that collects the exhaust from each exhaust port of the internal combustion engine and sends it to the exhaust pipe,
A large flange formed in each introduction port corresponding to each exhaust port and attached to the internal combustion engine;
An exhaust chamber communicated with each of the introduction holes, and an outer shell member formed along the longitudinal direction of the large flange,
An exhaust manifold, wherein a water cooling jacket having a substantially U-shaped cross section is attached to an outer wall of the outer shell member, and a cooling water flow path is formed between the outer wall of the outer shell member and the water cooling jacket. That is it.

前記外殻部材の前記外壁に前記冷却水流路の冷却水の流れを制御する突条を形成した構成としてもよい。若しくは、前記水冷ジャケットの前記内壁に前記冷却水流路の冷却水の流れを制御する突条を形成した構成としてもよい。また、前記外殻部材に前記水冷ジャケットが嵌る段部を形成して前記外殻部材に前記水冷ジャケットを取り付けた構成としてもよい。更に、前記外殻部材は、前記各導入孔に接続される枝管部が形成され前記排気室の前記大フランジ側が形成された下側外殻部材と、前記下側外殻部材に重ね合わされて前記排気室の残りを形成する上側外殻部材とを有する構成としてもよい。その際、前記下側外殻部材、前記上側外殻部材、前記水冷ジャケットをプレス成形すると共に、前記下側外殻部材に前記上側外殻部材を溶接し、また、前記上側外殻部材に形成した段部に前記水冷ジャケットを嵌めて溶接した構成としてもよい。   It is good also as a structure which formed the protrusion which controls the flow of the cooling water of the said cooling water flow path in the said outer wall of the said outer shell member. Or it is good also as a structure which formed the protrusion which controls the flow of the cooling water of the said cooling water flow path in the said inner wall of the said water cooling jacket. Moreover, it is good also as a structure which formed the step part which the said water cooling jacket fits in the said outer shell member, and attached the said water cooling jacket to the said outer shell member. Further, the outer shell member is overlapped with the lower outer shell member and a lower outer shell member in which a branch pipe portion connected to each introduction hole is formed and the large flange side of the exhaust chamber is formed. It is good also as a structure which has the upper side outer shell member which forms the remainder of the said exhaust chamber. At that time, the lower outer shell member, the upper outer shell member, and the water cooling jacket are press-molded, and the upper outer shell member is welded to the lower outer shell member, and is formed on the upper outer shell member. The water cooling jacket may be fitted to the stepped portion and welded.

本発明のエギゾーストマニホルドは、水冷ジャケットを外殻部材に重ねて、外殻部材の外壁と水冷ジャケットの内壁との間の空間に冷却水流路を形成するので、簡単な構造で、しかも、少ない部品点数で冷却水流路を形成でき、また、冷却水流量を少なくできるので軽量化できると共に、冷却水流路内に溶接箇所が露出することがないので、溶接不良による冷却水漏れを防止できるという効果を奏する。   In the exhaust manifold of the present invention, the cooling water flow path is formed in the space between the outer wall of the outer shell member and the inner wall of the water cooling jacket by superimposing the water cooling jacket on the outer shell member. The cooling water flow path can be formed by the number of points, and since the cooling water flow rate can be reduced, the weight can be reduced and the welded portion is not exposed in the cooling water flow path, so that it is possible to prevent cooling water leakage due to poor welding. Play.

また、外殻部材の外壁、若しくは、水冷ジャケットの内壁に突部を設けることにより、冷却水の淀みを抑制して効率よく冷却できるので、冷却水流量を少なくでき、更に、重量を低減できる。更に、外殻部材に水冷ジャケットが嵌る段部を形成することにより、組立が容易になる。   Further, by providing the protrusions on the outer wall of the outer shell member or the inner wall of the water cooling jacket, cooling can be efficiently performed while suppressing the stagnation of the cooling water, so that the cooling water flow rate can be reduced and the weight can be further reduced. Furthermore, assembly is facilitated by forming a step portion into which the water-cooling jacket fits in the outer shell member.

本発明の一実施形態としてのエギゾーストマニホルドの正面図である。It is a front view of an exhaust manifold as one embodiment of the present invention. 本実施形態のエギゾーストマニホルドの平面図である。It is a top view of the exhaust manifold of this embodiment. 図２のＡ−Ａ拡大断面図である。It is an AA expanded sectional view of FIG. 本実施形態のエギゾーストマニホルドの分解正面図である。It is an exploded front view of the exhaust manifold of this embodiment. 本実施形態のエギゾーストマニホルドの分解平面図である。It is an exploded top view of the exhaust manifold of this embodiment.

以下本発明を実施するための形態を図面に基づいて詳細に説明する。
図１に示すように、１はエギゾーストマニホルドで、内燃機関１００に取り付けられ、内燃機関１００は、各気筒＃１〜＃３に連通した各排気ポートＰ１〜Ｐ３を備えている。エギゾーストマニホルド１の下流側には、コンバータ２が接続されている。コンバータ２内には図示しない触媒が収納されており、流入する排気を浄化して下流側に排出する。例えば、内燃機関１００はＶ型６気筒で、その片側バンクに本実施形態のエギゾーストマニホルド１が取り付けられる。 DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings.
As shown in FIG. 1, reference numeral 1 denotes an exhaust manifold which is attached to the internal combustion engine 100, and the internal combustion engine 100 includes exhaust ports P1 to P3 communicating with the cylinders # 1 to # 3. A converter 2 is connected to the downstream side of the exhaust manifold 1. A catalyst (not shown) is accommodated in the converter 2 to purify the exhaust gas flowing in and discharge it downstream. For example, the internal combustion engine 100 is a V-type 6 cylinder, and the exhaust manifold 1 of the present embodiment is attached to one side bank thereof.

エギゾーストマニホルド１は大フランジ４を備え、大フランジ４には、図４に示すように、各排気ポートＰ１〜Ｐ３に対応した３個の導入孔６〜８が穿設されており、また、大フランジ４を内燃機関１００に図示しないボルトにより取り付けるための複数の取付穴１０が形成されている。導入孔６〜８の周囲には、内燃機関１００と反対側に突出した筒部１２〜１４が形成されている。尚、本実施形態では、大フランジ４は板材からプレス成形されて形成されている。   The exhaust manifold 1 is provided with a large flange 4, and, as shown in FIG. 4, the large flange 4 has three introduction holes 6 to 8 corresponding to the exhaust ports P1 to P3. A plurality of mounting holes 10 for mounting the flange 4 to the internal combustion engine 100 with bolts (not shown) are formed. Around the introduction holes 6 to 8, cylindrical portions 12 to 14 protruding to the opposite side of the internal combustion engine 100 are formed. In the present embodiment, the large flange 4 is formed by press molding from a plate material.

また、エギゾーストマニホルド１は外殻部材１６を備え、外殻部材１６は、図４、図５に示すように、板材からプレス成形した下側外殻部材１８を備え、下側外殻部材１８には大フランジ４の長手方向に沿ってほぼ大フランジ４とほぼ平行な平坦部１９が形成されている。   Further, the exhaust manifold 1 includes an outer shell member 16, and the outer shell member 16 includes a lower outer shell member 18 press-molded from a plate material, as shown in FIGS. 4 and 5. A flat portion 19 that is substantially parallel to the large flange 4 is formed along the longitudinal direction of the large flange 4.

下側外殻部材１８には平坦部１９から大フランジ４側に突出された各枝管部２０〜２２が形成されている。各枝管部２０〜２２は円筒状に形成されており、大フランジ４の各筒部１２〜１４内に挿入可能に形成され、各枝管部２０〜２２を各筒部１２〜１４内に挿入して、各枝管部２０〜２２と各筒部１２〜１４とが溶接されて固着されている。   The lower outer shell member 18 is formed with branch pipe portions 20 to 22 that protrude from the flat portion 19 to the large flange 4 side. Each branch pipe part 20-22 is formed in a cylindrical shape, is formed so as to be insertable into each cylindrical part 12-14 of the large flange 4, and each branch pipe part 20-22 is inserted into each cylindrical part 12-14. Inserted, each branch pipe part 20-22 and each cylinder part 12-14 are welded and fixed.

下側外殻部材１８は、大フランジ４側からコンバータ２側に平坦部１９から屈曲形成されて、断面形状がほぼ半円状の下側接続管部２４が形成されている。平坦部１９の周囲には大フランジ４と反対側に立ち上げられた壁部２６が形成されている。   The lower outer shell member 18 is bent from the flat portion 19 from the large flange 4 side to the converter 2 side, and a lower connection pipe portion 24 having a substantially semicircular cross section is formed. A wall portion 26 is formed around the flat portion 19 so as to stand on the opposite side of the large flange 4.

また、外殻部材１６は、下側外殻部材１８に重ね合わされる上側外殻部材２８を備え、上側外殻部材２８は板材からプレス成形されている。上側外殻部材２８は、断面形状が略Ｕ字状に形成されており、上側外殻部材２８の外周には、下側外殻部材１８の壁部２６外側に密着して嵌着される外側段部３０（図３参照）が形成されている。   The outer shell member 16 includes an upper outer shell member 28 that is superimposed on the lower outer shell member 18, and the upper outer shell member 28 is press-molded from a plate material. The upper outer shell member 28 has a substantially U-shaped cross-section, and the outer periphery of the upper outer shell member 28 is fitted to the outer side of the wall portion 26 of the lower outer shell member 18 in close contact with the outer shell member 28. A step portion 30 (see FIG. 3) is formed.

上側外殻部材２８には、下側外殻部材１８の下側接続管部２４に対向する上側接続管部３２が形成されており、上側接続管部３２は断面形状がほぼ半円状に形成されている。下側接続管部２４に上側接続管部３２を重ね合わせると、断面形状がほぼ円形の接続管部３４が形成される。   The upper outer shell member 28 is formed with an upper connecting pipe portion 32 that faces the lower connecting pipe portion 24 of the lower outer shell member 18, and the upper connecting pipe portion 32 has a substantially semicircular cross-sectional shape. Has been. When the upper connecting pipe portion 32 is superimposed on the lower connecting pipe portion 24, a connecting pipe portion 34 having a substantially circular cross section is formed.

下側外殻部材１８の壁部２６外側に上側外殻部材２８の外側段部３０を嵌着して、接続管部３４の開口を除いて、下側外殻部材１８の壁部２６と上側外殻部材２８の外側段部３０とが溶接により固着されている。   The outer step portion 30 of the upper outer shell member 28 is fitted on the outer side of the wall portion 26 of the lower outer shell member 18, and the upper wall portion 26 and the upper portion of the lower outer shell member 18 are removed except for the opening of the connecting pipe portion 34. The outer step portion 30 of the outer shell member 28 is fixed by welding.

上側外殻部材２８を下側外殻部材１８に重ね合わせた際、下側外殻部材１８の平坦部１９が上側外殻部材２８により覆われて、内部に各枝管部２０〜２２に連通した排気室３６（図３参照）が大フランジ４の長手方向に沿って形成され、排気室３６は接続管部３４に連通されている。   When the upper outer shell member 28 is superposed on the lower outer shell member 18, the flat portion 19 of the lower outer shell member 18 is covered with the upper outer shell member 28 and communicates with the branch pipe portions 20 to 22 inside. The exhaust chamber 36 (see FIG. 3) is formed along the longitudinal direction of the large flange 4, and the exhaust chamber 36 communicates with the connecting pipe portion 34.

上側外殻部材２８には、水冷ジャケット３８が重ね合わされており、水冷ジャケット３８は断面形状が略Ｕ字状に形成されている（図３参照）。水冷ジャケット３８は上側外殻部材２８の外壁のほぼ全体を覆うように形成されており、上側外殻部材２８の外側段部３０に沿って内側段部４０（図３参照）が形成されている。   A water cooling jacket 38 is superimposed on the upper outer shell member 28, and the water cooling jacket 38 has a substantially U-shaped cross section (see FIG. 3). The water cooling jacket 38 is formed so as to cover almost the entire outer wall of the upper outer shell member 28, and an inner step portion 40 (see FIG. 3) is formed along the outer step portion 30 of the upper outer shell member 28. .

水冷ジャケット３８は内側段部４０の外側に密着して嵌着され、内側段部４０と水冷ジャケット３８の外周とが全周溶接やろう付け等により固着されている。接続管部３４がコンバータ２の開口に挿入されて、溶接やろう付け等により固着されている。   The water cooling jacket 38 is fitted in close contact with the outer side of the inner stepped portion 40, and the inner stepped portion 40 and the outer periphery of the water cooling jacket 38 are fixed to each other by full circumference welding, brazing or the like. The connecting pipe part 34 is inserted into the opening of the converter 2 and fixed by welding, brazing or the like.

水冷ジャケット３８を上側外殻部材２８に重ね合わせた際、上側外殻部材２８の外壁と水冷ジャケット３８の内壁との間の空間に冷却水流路４２が形成される。冷却水流路４２は、上側外殻部材２８の外壁に沿い、各枝管部２０〜２２の並びに沿って大フランジ４の長手方向に形成されている。水冷ジャケット３８には、一方の端側に導管４４が溶接やろう付け等により固着されており、接続管部３４側の端に導管４６が溶接やろう付け等により固着されている。両導管４４，４６は冷却水流路４２を介して連通されている。   When the water cooling jacket 38 is superimposed on the upper outer shell member 28, a cooling water flow path 42 is formed in a space between the outer wall of the upper outer shell member 28 and the inner wall of the water cooling jacket 38. The cooling water flow path 42 is formed in the longitudinal direction of the large flange 4 along the outer wall of the upper outer shell member 28 and along the arrangement of the branch pipe portions 20 to 22. A conduit 44 is fixed to one end side of the water cooling jacket 38 by welding, brazing, or the like, and a conduit 46 is fixed to the end of the connecting pipe portion 34 by welding, brazing, or the like. Both the conduits 44 and 46 are communicated with each other via the cooling water passage 42.

上側外殻部材２８の外壁には、冷却水流路４２側に突出された２本の突部４８，５０が形成されている。突部４８，５０は一方の導管４４側から他方の導管４６側に向かって、冷却水流路４２に沿って形成されている。尚、本実施形態では、上側外殻部材２８に突部４８，５０を形成したが、水冷ジャケット３８の内壁に上側外殻部材２８側に突出させた突部を形成した構造でもよい。   Two protrusions 48 and 50 are formed on the outer wall of the upper outer shell member 28 so as to protrude toward the cooling water flow path 42. The protrusions 48 and 50 are formed along the cooling water flow path 42 from the one conduit 44 side toward the other conduit 46 side. In the present embodiment, the protrusions 48 and 50 are formed on the upper outer shell member 28. However, a structure in which a protrusion protruding toward the upper outer shell member 28 is formed on the inner wall of the water cooling jacket 38 may be used.

次に、前述した本実施形態のエギゾーストマニホルド１の作動について説明する。
まず、内燃機関１００が運転されると、各排気ポートＰ１〜Ｐ３から大フランジ４の各筒部１２〜１４及び下側外殻部材１８の各枝管部２０〜２２を介して、排気室３６に排気が流入する。排気室３６に流入した排気は、接続管部３４からコンバータ２に送られて、コンバータ２内の触媒により浄化されて、下流側の排気管に流出する。 Next, the operation of the exhaust manifold 1 of the present embodiment described above will be described.
First, when the internal combustion engine 100 is operated, the exhaust chamber 36 is passed from the exhaust ports P1 to P3 through the cylindrical portions 12 to 14 of the large flange 4 and the branch pipe portions 20 to 22 of the lower outer shell member 18. Exhaust flows into the. The exhaust gas that has flowed into the exhaust chamber 36 is sent to the converter 2 from the connection pipe portion 34, is purified by the catalyst in the converter 2, and flows out to the downstream exhaust pipe.

一方の導管４４から導入された冷却水は冷却水流路４２から他方の導管４６に向かって流れる。その際、突部４８，５０により、冷却水の流れが突部４８，５０に沿った流れに制御され、冷却水は冷却水流路４２内を淀みなく流れて、他方の導管４６から外部に流出する。突部４８，５０により、冷却水が淀みなく流れ、突部４８，５０を設けたことにより冷却水の流れを淀みなく制御できる。   The cooling water introduced from one conduit 44 flows from the cooling water flow path 42 toward the other conduit 46. At this time, the flow of the cooling water is controlled by the protrusions 48, 50 to flow along the protrusions 48, 50, and the cooling water flows in the cooling water flow path 42 without stagnation and flows out from the other conduit 46 to the outside. To do. The projections 48 and 50 allow the cooling water to flow without stagnation, and the provision of the projections 48 and 50 allows the cooling water flow to be controlled without stagnation.

冷却水が冷却水流路４２内を流れる際に、冷却水と上側外殻部材２８を介して排気室３６の排気との間で熱交換が行われ、排気温度が低下すると共に、冷却水温度が上昇する。排気温度を低下させることにより、コンバータ２の触媒温度の上昇を抑制して、触媒の貴金属の粗大化を防ぎ、浄化性能の低下を防止する。   When the cooling water flows in the cooling water flow path 42, heat exchange is performed between the cooling water and the exhaust gas in the exhaust chamber 36 via the upper outer shell member 28, and the exhaust gas temperature is lowered and the cooling water temperature is reduced. To rise. By lowering the exhaust temperature, the rise in the catalyst temperature of the converter 2 is suppressed, so that the precious metal of the catalyst is prevented from becoming coarse and the purification performance is prevented from being lowered.

このように、水冷ジャケット３８を上側外殻部材２８に重ねて、上側外殻部材２８の外壁と水冷ジャケット３８の内壁との間の空間に冷却水流路４２を形成するので、簡単な構造で、しかも、少ない部品点数で冷却水流路４２を形成できる。しかも、外殻部材１６の全体を水冷ジャケット３８で覆うのではなく、一部に重ねて覆うので、冷却水流路４２の容積を小さくでき、冷却水量を少なくできるので、重量の増加を抑制できる。   Thus, the water cooling jacket 38 is overlapped with the upper outer shell member 28, and the cooling water flow path 42 is formed in the space between the outer wall of the upper outer shell member 28 and the inner wall of the water cooling jacket 38. In addition, the cooling water channel 42 can be formed with a small number of parts. In addition, since the entire outer shell member 16 is not covered with the water cooling jacket 38 but is partially overlapped and covered, the volume of the cooling water passage 42 can be reduced and the amount of cooling water can be reduced, so that an increase in weight can be suppressed.

しかも、突部４８，５０を設けることで、冷却水の淀みを抑制して効率よく冷却できるので、この点でも冷却水量を少なくでき、重量を低減できる。更に、冷却水流路４２内に溶接箇所が露出することがないので、溶接不良による冷却水漏れを防止できる。尚、本実施形態では、外殻部材１６を下側外殻部材１８と上側外殻部材２８とにより形成したが、これに限らず、下側外殻部材１８を設けることなく、上側外殻部材２８を大フランジ４に取り付けた構成でもよい。   In addition, since the protrusions 48 and 50 are provided, cooling can be efficiently performed while suppressing the stagnation of the cooling water, so that the cooling water amount can be reduced and the weight can be reduced. Furthermore, since no welded portion is exposed in the cooling water passage 42, leakage of cooling water due to poor welding can be prevented. In this embodiment, the outer shell member 16 is formed by the lower outer shell member 18 and the upper outer shell member 28. However, the present invention is not limited to this, and the upper outer shell member 18 is not provided without providing the lower outer shell member 18. The structure which attached 28 to the large flange 4 may be sufficient.

以上本発明はこの様な実施形態に何等限定されるものではなく、本発明の要旨を逸脱しない範囲において種々なる態様で実施し得る。   The present invention is not limited to such embodiments as described above, and can be implemented in various modes without departing from the gist of the present invention.

１…エギゾーストマニホルド ２…コンバータ
４…大フランジ ６〜８…導入孔
１２〜１４…筒部 １６…外殻部材
１８…下側外殻部材 １９…平坦部
２０〜２２…枝管部 ２４…下側接続管部
２６…壁部 ２８…上側外殻部材
３０…外側段部 ３２…上側接続管部
３４…接続管部 ３６…排気室
３８…水冷ジャケット ４０…内側段部
４２…冷却水流路 ４４，４６…導管
４８，５０…突部 １００…内燃機関 DESCRIPTION OF SYMBOLS 1 ... Exhaust manifold 2 ... Converter 4 ... Large flange 6-8 ... Introduction hole 12-14 ... Cylindrical part 16 ... Outer shell member 18 ... Lower outer shell member 19 ... Flat part 20-22 ... Branch pipe part 24 ... Lower side Connection pipe part 26 ... Wall part 28 ... Upper outer shell member 30 ... Outer step part 32 ... Upper connection pipe part 34 ... Connection pipe part 36 ... Exhaust chamber 38 ... Water cooling jacket 40 ... Inner step part 42 ... Cooling water flow path 44, 46 ... Conduit 48, 50 ... Projection 100 ... Internal combustion engine

Claims (6)

内燃機関の各排気ポートからの排気を集合して排気管に送るエギゾーストマニホルドにおいて、
前記各排気ポートに対応した各導入孔が形成され前記内燃機関に取り付けられる大フランジと、
前記各導入孔に連通する排気室が前記大フランジの長手方向に沿って形成された外殻部材とを備え、
また、前記外殻部材の外壁に断面略Ｕ字状の水冷ジャケットを取り付けて、前記外殻部材の前記外壁と前記水冷ジャケットの内壁との間に冷却水流路を形成したことを特徴とするエギゾーストマニホルド。 In the exhaust manifold that collects the exhaust from each exhaust port of the internal combustion engine and sends it to the exhaust pipe,
A large flange formed in each introduction port corresponding to each exhaust port and attached to the internal combustion engine;
An exhaust chamber communicated with each of the introduction holes, and an outer shell member formed along the longitudinal direction of the large flange,
Further, an exhaust is characterized in that a water cooling jacket having a substantially U-shaped cross section is attached to the outer wall of the outer shell member, and a cooling water flow path is formed between the outer wall of the outer shell member and the inner wall of the water cooling jacket. Manifold. 前記外殻部材の前記外壁に前記冷却水流路の冷却水の流れを制御する突条を形成したことを特徴とする請求項１に記載のエギゾーストマニホルド。 The exhaust manifold according to claim 1, wherein a protrusion for controlling a flow of the cooling water in the cooling water passage is formed on the outer wall of the outer shell member. 前記水冷ジャケットの前記内壁に前記冷却水流路の冷却水の流れを制御する突条を形成したことを特徴とする請求項１または請求項２のいずれかに記載のエギゾーストマニホルド。 The exhaust manifold according to claim 1 or 2, wherein a protrusion for controlling the flow of the cooling water in the cooling water passage is formed on the inner wall of the water cooling jacket. 前記外殻部材に前記水冷ジャケットが嵌る段部を形成して、前記外殻部材に前記水冷ジャケットを取り付けたことを特徴とする請求項１ないし請求項３のいずれかに記載のエギゾーストマニホルド。 The exhaust manifold according to any one of claims 1 to 3, wherein a step portion into which the water cooling jacket is fitted is formed in the outer shell member, and the water cooling jacket is attached to the outer shell member. 前記外殻部材は、前記各導入孔に接続される枝管部が形成され前記排気室の前記大フランジ側が形成された下側外殻部材と、前記下側外殻部材に重ね合わされて前記排気室の残りを形成する上側外殻部材とを有することを特徴とする請求項１ないし請求項４のいずれかに記載のエギゾーストマニホルド。 The outer shell member includes a lower outer shell member in which a branch pipe portion connected to each of the introduction holes is formed and the large flange side of the exhaust chamber is formed, and the lower outer shell member overlapped with the lower outer shell member. An exhaust manifold according to any one of claims 1 to 4, further comprising an upper outer shell member forming the remainder of the chamber. 前記下側外殻部材、前記上側外殻部材、前記水冷ジャケットをプレス成形すると共に、前記下側外殻部材に前記上側外殻部材を溶接し、また、前記上側外殻部材に形成した段部に前記水冷ジャケットを嵌めて溶接したことを特徴とする請求項５に記載のエギゾーストマニホルド。 The lower outer shell member, the upper outer shell member, and the water cooling jacket are press-molded, and the upper outer shell member is welded to the lower outer shell member, and the step portion formed on the upper outer shell member 6. The exhaust manifold according to claim 5, wherein the water cooling jacket is fitted and welded to the exhaust manifold.
JP2010057720A 2010-03-15 2010-03-15 Exhaust manifold Pending JP2011190752A (en)

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DE102013210159A1 (en) * 2013-05-31 2014-12-04 Friedrich Boysen Gmbh & Co. Kg exhaust manifold

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JP6653970B2 (en) * 2017-03-31 2020-02-26 株式会社三五 Exhaust gas purification device

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DE725013C (en) * 1940-08-21 1942-09-11 Werke Kiel Ag Deutsche Water-cooled exhaust pipe for internal combustion engines
JPS5822411U (en) * 1981-08-04 1983-02-12 ヤンマーディーゼル株式会社 Cooled exhaust pipe device for marine internal combustion engines
JP4283927B2 (en) * 1999-03-02 2009-06-24 フタバ産業株式会社 Exhaust manifold

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DE102013210159A1 (en) * 2013-05-31 2014-12-04 Friedrich Boysen Gmbh & Co. Kg exhaust manifold

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