JPH0318016B2 - - Google Patents
Info
- Publication number
- JPH0318016B2 JPH0318016B2 JP62320000A JP32000087A JPH0318016B2 JP H0318016 B2 JPH0318016 B2 JP H0318016B2 JP 62320000 A JP62320000 A JP 62320000A JP 32000087 A JP32000087 A JP 32000087A JP H0318016 B2 JPH0318016 B2 JP H0318016B2
- Authority
- JP
- Japan
- Prior art keywords
- passage
- oxygen sensor
- exhaust
- manifold
- sensor chamber
- 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.)
- Expired - Lifetime
Links
- 239000001301 oxygen Substances 0.000 claims description 24
- 229910052760 oxygen Inorganic materials 0.000 claims description 24
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 6
- 238000002485 combustion reaction Methods 0.000 claims description 5
- 230000009977 dual effect Effects 0.000 claims description 3
- 238000004080 punching Methods 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 description 7
- 238000003754 machining Methods 0.000 description 6
- 238000005266 casting Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 238000005192 partition Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 150000002926 oxygen Chemical class 0.000 description 1
Classifications
-
- 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
- F01N13/008—Mounting or arrangement of exhaust sensors in or on exhaust apparatus
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Silencers (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は多気筒内燃機関の排気マニフオルド
に関し、詳しくはその酸素センサ取付部の加工方
法に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an exhaust manifold for a multi-cylinder internal combustion engine, and more particularly to a method of machining an oxygen sensor mounting portion thereof.
（従来の技術）
多気筒内燃機関用の排気マニフオルドとして、
各気筒の排気ポートに接続するブランチ部（枝
管）を、排気管との接続フランジ部に至る途中で
２つの通路部にまで集合化したデユアルマニフオ
ルドが知られている。(Prior art) As an exhaust manifold for multi-cylinder internal combustion engines,
A dual manifold is known in which branch portions (branch pipes) connected to exhaust ports of each cylinder are aggregated into two passage portions on the way to a flange portion connecting with an exhaust pipe.
例えば、第１図に直列４気筒内燃機関用のもの
を示すが、図示したように＃１，＃４のブランチ
部１，４を集合化した通路部５と、＃２，＃３の
ブランチ部２，３を集合化した通路部６とがそれ
ぞれの集合部７，８の下流側にて互いにほぼ平行
になるように一体的に形成されており、前記２つ
の通路部５，６の出口端に位置するフランジ部９
にて図示しない排気管に接続するようになつてい
る。 For example, in Fig. 1, an in-line four-cylinder internal combustion engine is shown. A passage portion 6 in which the passage portions 2 and 3 are aggregated is integrally formed so as to be substantially parallel to each other on the downstream side of the respective aggregate portions 7 and 8, and the outlet ends of the two passage portions 5 and 6 are Flange part 9 located at
It is designed to be connected to an exhaust pipe (not shown) at.
ところで、図において１０は排気対策にあたつ
て排気中の酸素濃度を検出するための酸素センサ
であるが、この酸素センサ１０を取り付ける場
合、第２図に示したように２つの通路部５，６を
隔てる通路壁部１１に有底状の筒部１２を設けて
センサ室１３を形成し、このセンサ室１３内に酸
素センサ１０の検出部１４を挿入するようにして
いる。センサ室１３には筒部１２に形成した通気
孔１５，１６を介して２つの通路部５，６を流れ
る排気を導入し、これにより平均的な酸素濃度を
検出するのである。（実公昭56−27394号公報及び
幣社出願実願昭56−159492号）
（発明が解決しようとする問題点）
しかしながら、このような従来の排気マニフオ
ルド構造では、マニフオルドを鋳造するときに上
記通気孔１５，１６を鋳抜きにより形成するのが
困難なことから、通気孔１５，１６の加工に多く
の工数を要するという加工上の問題が生じる。 Incidentally, in the figure, reference numeral 10 is an oxygen sensor for detecting the oxygen concentration in exhaust gas as part of exhaust gas countermeasures.When installing this oxygen sensor 10, two passage sections 5, A bottomed cylindrical portion 12 is provided on a passage wall portion 11 separating the oxygen sensor 6 to form a sensor chamber 13, into which the detection portion 14 of the oxygen sensor 10 is inserted. Exhaust gas flowing through the two passage sections 5 and 6 is introduced into the sensor chamber 13 through vent holes 15 and 16 formed in the cylindrical section 12, thereby detecting the average oxygen concentration. (Utility Model Publication No. 56-27394 and Japanese Utility Model Application No. 56-159492) (Problems to be Solved by the Invention) However, in such a conventional exhaust manifold structure, when casting the manifold, the above-mentioned Since it is difficult to form the air holes 15 and 16 by casting, there arises a problem in processing that a large number of man-hours are required to process the ventilation holes 15 and 16.
つまり、従来は第２図に示したように２つの通
路部５，６の各々の側面部の適当な部位に鋳抜き
による通孔１７が開口するボス状の厚肉部１８を
設けて、通孔１７から想像線で示したように工具
を通して通気孔１５，１６を加工した後、栓体１
９で通孔１７をふさぐという工程が必要であつ
た。また、この場合機関運転に伴い通孔１７と栓
体１９とが熱的変形により隙間を生じて排気漏れ
を起こしたり、著しくは栓体１９が脱落したりす
るおそれもあつた。 That is, conventionally, as shown in FIG. 2, a thick boss-shaped part 18 in which a through hole 17 is opened by casting is provided at an appropriate position on the side surface of each of the two passage parts 5 and 6. After machining the ventilation holes 15 and 16 by passing a tool through the hole 17 as shown by the imaginary line, the plug body 1 is
9 was required to close the through hole 17. Further, in this case, there was a risk that a gap would be created between the through hole 17 and the plug body 19 due to thermal deformation as the engine operated, causing exhaust leakage, or even that the plug body 19 would fall off.
これに対して、例えば実開昭52−164602号には
集合部の２個の通路を隔てる仕切壁の一部を切り
欠いた形状として、その切欠部にセンサ検出部が
位置するように酸素センサを取り付けるようにし
た構造が示されており、このような構造の場合は
形状が単純であるので鋳造のみでもセンサ取付部
を加工することが可能である。 On the other hand, for example, in Utility Model Application No. 52-164602, a part of the partition wall that separates two passages in the collecting section is cut out, and an oxygen sensor is installed so that the sensor detection part is located in the cutout. In the case of such a structure, since the shape is simple, it is possible to process the sensor mounting part by only casting.
ただし、この排気マニフオルドでは、仕切壁の
切欠と酸素センサとの間に隙間が生じて、２個の
隣接する排気通路が直接連通した状態になるため
排気干渉を起こしやすく、こうした不定形状の隙
間等ににより酸素濃度の検出精度が低下するおそ
れが有り、さらに排気管内でアフターバーンが起
きたときにその高圧を酸素センサが直接受けるこ
とになるのでセンサの耐久性を損ないやすいな
ど、第２図のように酸素センサ室を一体形成した
ものに比較して機能上劣る部分が多かつた。 However, in this exhaust manifold, a gap is created between the notch in the partition wall and the oxygen sensor, and two adjacent exhaust passages are in direct communication, which tends to cause exhaust interference, and such irregularly shaped gaps etc. This may reduce the accuracy of oxygen concentration detection, and furthermore, when afterburn occurs in the exhaust pipe, the oxygen sensor will be directly exposed to the high pressure, which can easily impair the durability of the sensor, as shown in Figure 2. As such, there were many parts that were inferior in terms of functionality compared to those in which the oxygen sensor chamber was integrally formed.
この発明はこうした従来の問題点に着目してな
されたもので、排気干渉や酸素センサの耐久性及
び検出精度の低下を引き起こさないようにセンサ
室を一体形成した排気マニフオルドを容易に加工
しうる方法を提供するものである。 This invention was made in view of these conventional problems, and is a method for easily fabricating an exhaust manifold with an integrated sensor chamber so as not to cause exhaust interference or deterioration in the durability and detection accuracy of the oxygen sensor. It provides:
（問題点を解決するための手段）
この発明では、多気筒内燃機関の排気ポートに
接続する複数のブランチ部を、排気管との接続フ
ランジ部に至る途中で２つの通路部にまで集合化
したデユアルマニフオルドにおいて、酸素センサ
室を形成する有底状の筒部を、前記２つの通路部
を隔てる通路壁に一体的に、かつ前記フランジ部
の近傍に設け、前記フランジ部の通路開口部から
穿孔具を挿入して前記筒部の壁面を穿ち、酸素セ
ンサ室を前記２つの通路部と連通する通気孔を形
成するようにした。(Means for Solving the Problems) In this invention, a plurality of branch portions connected to the exhaust port of a multi-cylinder internal combustion engine are aggregated into two passage portions on the way to the flange portion connecting with the exhaust pipe. In the dual manifold, a bottomed cylindrical part forming an oxygen sensor chamber is provided integrally with the passage wall separating the two passage parts and near the flange part, and is provided from the passage opening of the flange part. A punching tool was inserted to pierce the wall surface of the cylindrical portion to form a ventilation hole communicating the oxygen sensor chamber with the two passage portions.
（作用）
従つて、酸素センサ室を形成するための加工工
程が簡略化し、センサ室への通気孔を加工するた
めの穿孔具を通す通孔やこれをふさぐための栓体
などを格別に設ける必要がなくなる。(Function) Therefore, the processing process for forming the oxygen sensor chamber is simplified, and a hole for passing a punch to form a ventilation hole to the sensor chamber and a plug for blocking the hole are specially provided. There will be no need.
（実施例）
以下、この発明を図面に示した実施例に基づい
て説明する。なお、第１図または第２図に対応す
る部分には同一の符号を付して示すことにする。(Example) The present invention will be described below based on an example shown in the drawings. Note that parts corresponding to FIG. 1 or FIG. 2 are designated by the same reference numerals.
この発明では、第３図〜第５図に示したよう
に、センサ室１３を形成する有底状の筒部１２
を、２つの通路部５，６を隔てる通路壁部１１に
一体的に、かつ図示しない排気管を接続するため
のフランジ部９の近傍に位置するように形成す
る。 In this invention, as shown in FIGS. 3 to 5, a bottomed cylindrical portion 12 forming a sensor chamber 13 is provided.
is formed integrally with the passage wall part 11 separating the two passage parts 5 and 6, and located near the flange part 9 for connecting an exhaust pipe (not shown).
そして、このように筒部１２をフランジ部９の
近傍に設けると、フランジ部９での２つの通路部
５，６の開口部２５，２６を介してドリルやフラ
イスなどの穿孔具を挿入して筒部１２に容易にセ
ンサ室１３への通気孔を加工することができる。
この実施例では、第４図または第５図に想像線で
示したように、前記２つの開口部２５，２６の
各々からセンサ室１３の中心部に向けて互いにほ
ぼ直交する方向へと交互に工具を通し、筒部１２
を貫通して都合４個の通気孔２７を形成してい
る。なお、第６図として、第４図の−断面図
を示す。 When the cylindrical part 12 is provided near the flange part 9 in this way, a punching tool such as a drill or a milling cutter can be inserted through the openings 25 and 26 of the two passage parts 5 and 6 in the flange part 9. A ventilation hole to the sensor chamber 13 can be easily formed in the cylindrical portion 12.
In this embodiment, as shown by imaginary lines in FIG. 4 or FIG. Pass the tool through the cylindrical part 12
A total of four ventilation holes 27 are formed through the. In addition, as FIG. 6, a cross-sectional view taken from the line -- in FIG. 4 is shown.
（発明の効果）
以上のようにこの発明によれば、通路壁と筒部
を一体化したことにより、酸素センサ室を形成す
るための加工工程が簡略化すると共に、酸素セン
サ室を両通路部と連通するための通気孔の加工時
に、マニフオルド壁面部に穿孔具を通すための加
工用穴を設けたり、加工後にこの穴を塞いだりす
る必要もなく、したがつて、これらが相まつて、
２つの通路部の排気干渉の少ない、平均的な酸素
濃度の検出精度の高い、しかも酸素センサの保護
機能に優れる軽量な排気マニフオルドを、低加工
コストのもとに製造できる。(Effects of the Invention) As described above, according to the present invention, by integrating the passage wall and the cylindrical part, the machining process for forming the oxygen sensor chamber is simplified, and the oxygen sensor chamber is connected to both passages. When machining the ventilation hole to communicate with the manifold, there is no need to create a machining hole in the manifold wall for passing the punch through, or to close this hole after machining.
A lightweight exhaust manifold with less interference between exhaust gases between two passages, high accuracy in detecting average oxygen concentration, and excellent oxygen sensor protection function can be manufactured at low processing costs.
第１図は従来例の正面図、第２図はその−
断面図である。第３図はこの発明の実施例の正面
図、第４図はその要部上面図、第５図は同断面
図、第６図は第４図の−断面図である。
１，２，３，４……ブランチ部（枝管）、５，
６……通路部、９……フランジ部、１０……酸素
センサ、１１……通路壁部、１２……筒部、１３
……センサ室、２７……通気孔。
Figure 1 is a front view of the conventional example, and Figure 2 is its -
FIG. FIG. 3 is a front view of an embodiment of the present invention, FIG. 4 is a top view of essential parts thereof, FIG. 5 is a sectional view thereof, and FIG. 6 is a sectional view taken along the line taken from FIG. 4. 1, 2, 3, 4... branch part (branch pipe), 5,
6... Passage part, 9... Flange part, 10... Oxygen sensor, 11... Passage wall part, 12... Cylindrical part, 13
...Sensor room, 27...Vent hole.
Claims (1)
のブランチ部を、排気管との接続フランジ部に至
る途中で２つの通路部にまで集合化したデユアル
マニフオルドにおいて、酸素センサ室を形成する
有底状の筒部を、前記２つの通路部を隔てる通路
壁に一体的に、かつ前記フランジ部の近傍に設
け、前記フランジ部の通路開口部から穿孔具を挿
入して前記筒部の壁面を穿ち、酸素センサ室を前
記２つの通路部と連通する通気孔を形成すること
を特徴とする排気マニフオルドの酸素センサ取付
部の加工方法。1 In a dual manifold in which multiple branch portions connected to the exhaust port of a multi-cylinder internal combustion engine are aggregated into two passage portions on the way to the flange portion connecting with the exhaust pipe, a bottomed manifold forming an oxygen sensor chamber is used. A shaped cylindrical portion is provided integrally with the passage wall separating the two passage portions and near the flange portion, and a punching tool is inserted through the passage opening of the flange portion to pierce the wall surface of the cylindrical portion. . A method for processing an oxygen sensor mounting portion of an exhaust manifold, comprising forming a vent hole that communicates the oxygen sensor chamber with the two passage portions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32000087A JPS63179142A (en) | 1987-12-17 | 1987-12-17 | Exhaust manifold for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32000087A JPS63179142A (en) | 1987-12-17 | 1987-12-17 | Exhaust manifold for internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63179142A JPS63179142A (en) | 1988-07-23 |
| JPH0318016B2 true JPH0318016B2 (en) | 1991-03-11 |
Family
ID=18116632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32000087A Granted JPS63179142A (en) | 1987-12-17 | 1987-12-17 | Exhaust manifold for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63179142A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3521895B2 (en) * | 2000-12-07 | 2004-04-26 | 日産自動車株式会社 | Exhaust manifold of internal combustion engine |
| JP3791419B2 (en) * | 2002-01-17 | 2006-06-28 | 日産自動車株式会社 | Exhaust device for internal combustion engine |
| JP5517665B2 (en) * | 2010-02-17 | 2014-06-11 | フタバ産業株式会社 | Exhaust system |
| CN103726945A (en) * | 2013-12-06 | 2014-04-16 | 江门市大长江集团有限公司 | Oxygen sensor installation structure of motorcycle engine |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5627394Y2 (en) * | 1976-06-09 | 1981-06-30 | ||
| JPS6115208Y2 (en) * | 1980-10-24 | 1986-05-12 |
-
1987
- 1987-12-17 JP JP32000087A patent/JPS63179142A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63179142A (en) | 1988-07-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2126293B1 (en) | Positive crankcase ventilation system, cylinder head used for positive crankcase ventilation system, internal combustion engine including positive crankcase ventilation system, and positive crankcase ventilation method | |
| US9341102B2 (en) | Conformal transverse muffler | |
| WO2008102917A1 (en) | Exhaust device for internal combustion engine | |
| DE50109943D1 (en) | Exhaust manifold for exhaust removal from an internal combustion engine | |
| JPS61261617A (en) | Exhaust manifold for multicylinder internal-combustion engine | |
| US20060053782A1 (en) | Exhaust manifold | |
| JPH0318016B2 (en) | ||
| JPS6117247Y2 (en) | ||
| US20130104817A1 (en) | Engine assembly including crankcase ventilation system | |
| JPH0752324Y2 (en) | Engine blow-by gas passage | |
| JP2006017091A (en) | Engine | |
| JP2873304B2 (en) | Exhaust manifold for internal combustion engine with supercharger | |
| JPH0224897Y2 (en) | ||
| JP2005083193A (en) | Exhaust device for internal combustion engine | |
| JPS5925048A (en) | Air-valve operating apparatus for multicyclinder engine | |
| JPS6029655Y2 (en) | internal combustion engine cylinder head | |
| JPH0660714U (en) | Rocker cover oil separator | |
| JPH0551766B2 (en) | ||
| JP3807373B2 (en) | Gas sensor | |
| JPS6343565B2 (en) | ||
| JPH02173309A (en) | Blow-by gas deoxidation device of engine | |
| JPH078517U (en) | Exhaust silencer for prime mover | |
| JPH06589Y2 (en) | Intake port structure of rotary piston engine | |
| JPH0137133Y2 (en) | ||
| JPS643810Y2 (en) |