JPS6338331Y2 - - Google Patents
Info
- Publication number
- JPS6338331Y2 JPS6338331Y2 JP10055883U JP10055883U JPS6338331Y2 JP S6338331 Y2 JPS6338331 Y2 JP S6338331Y2 JP 10055883 U JP10055883 U JP 10055883U JP 10055883 U JP10055883 U JP 10055883U JP S6338331 Y2 JPS6338331 Y2 JP S6338331Y2
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- exhaust
- secondary air
- intake
- air feed
- 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
Links
- 238000002485 combustion reaction Methods 0.000 claims description 13
- 238000000746 purification Methods 0.000 claims description 4
- 235000014676 Phragmites communis Nutrition 0.000 description 9
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 230000010349 pulsation Effects 0.000 description 3
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Exhaust Gas After Treatment (AREA)
Description
【考案の詳細な説明】
本考案は内燃機関において、排気系に排気浄化
用二次エアを供給するための二次エアフイードパ
イプの取付装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a secondary air feed pipe mounting device for supplying secondary air for exhaust purification to an exhaust system in an internal combustion engine.
従来、機関本体の排気ポートに二次エアを供給
して排気中に含まれるHC，CO等の有害成分を酸
化消去するようにした、排気浄化装置において、
機関本体に、排気ポートに連通する二次エア通路
を形成し、この通路に大気に開口するエアフイー
ドパイプを接続し、このパイプの途中に介在され
るリード弁等の逆止弁を、排気系に発生する排気
脈動をもつて間歇的に開弁し、大気、すなわち二
次エアを排気系に供給し、排気中のHC，CO等の
未燃有害成分を酸化消去するようにしたものが知
られている。 Conventionally, in exhaust purification devices that supply secondary air to the exhaust port of the engine body to oxidize and eliminate harmful components such as HC and CO contained in the exhaust,
A secondary air passage that communicates with the exhaust port is formed in the engine body, an air feed pipe that opens to the atmosphere is connected to this passage, and a check valve such as a reed valve inserted in the middle of this pipe is connected to the exhaust system. There is a known system in which the valve opens intermittently with the exhaust pulsation that occurs, supplying atmospheric air, or secondary air, to the exhaust system to oxidize and eliminate unburned harmful components such as HC and CO in the exhaust. It is being
ところで前記従来のものでは、二次エアフイー
ドパイプの端部に取付フランジを設け、これを機
関本体にボルト等の固着具によつて単独で固着す
るようにしていたので、部品点数が多くなるばか
りでなくその組付に手間がかゝり、その結果コス
トが嵩み、さらに機関全体の重量増を招く不都合
があつた。 However, in the conventional system described above, a mounting flange is provided at the end of the secondary air feed pipe, and this is independently fixed to the engine body with a fastener such as a bolt, which only increases the number of parts. However, it takes time and effort to assemble it, resulting in increased costs and the inconvenience of increasing the weight of the engine as a whole.
本考案は上記実情にかんがみてなされたもの
で、機関本体に吸気管、もしくは排気管を固着す
るに際して、前記二次エアフイードパイプを同時
に機関本体に固着できるようにして二次エアフイ
ードパイプの組立性を向上させるとともに該パイ
プを固着するための部品点数を削減して全体とし
てコストを大幅に低減し、さらに機関重量の低減
を図るようにした内燃機関における排気浄化用エ
アフイードパイプ取付装置を提供することを目的
とするものである。 The present invention was developed in view of the above circumstances, and it is possible to assemble the secondary air feed pipe by simultaneously fixing the secondary air feed pipe to the engine body when fixing the intake pipe or exhaust pipe to the engine body. Provided is an air feed pipe mounting device for exhaust purification in an internal combustion engine that improves performance, reduces the number of parts for fixing the pipe, significantly reduces overall cost, and further reduces engine weight. The purpose is to
本考案によれば、前記目的達成のため、機関本
体に吸気管および排気管端部の取付フランジをそ
れぞれ固着し、燃焼室に通じる吸気ポートおよび
排気ポートの開口端を前記吸気管および排気管に
それぞれ連通してなる、内燃機関において、前記
機関本体に、前記排気ポートに連通する二次エア
通路を穿設し、該通路の開口端に、逆止弁を介し
て大気に連通する二次エアフイードパイプのジヨ
イントを抜差自在に接続し、該ジヨイントを、機
関本体に固着される、吸気管もしくは排気管端部
の前記取付フランジを以て固定したことを特徴と
する。 According to the present invention, in order to achieve the above object, the mounting flanges at the ends of the intake pipe and the exhaust pipe are respectively fixed to the engine body, and the open ends of the intake port and exhaust port communicating with the combustion chamber are connected to the intake pipe and the exhaust pipe. In the internal combustion engine, the engine body is provided with a secondary air passage communicating with the exhaust port, and a secondary air passage communicating with the atmosphere via a check valve is provided at the open end of the passage. The joint of the eed pipe is removably connected, and the joint is fixed by the mounting flange at the end of the intake pipe or exhaust pipe, which is fixed to the engine body.
以下、図面により水平対向型４気筒内燃機関に
本考案を実施した場合の実施例について説明す
る。 Hereinafter, an embodiment in which the present invention is implemented in a horizontally opposed four-cylinder internal combustion engine will be described with reference to the drawings.
第１図において、前記機関の機関本体Ｅは、略
水平なシリンダ軸線をもつシリンダブロツク１
と、該ブロツク１の端面にガスケツト３を介して
固着されるシリンダヘツド２とを備える。シリン
ダブロツク１のシリンダ孔４内にはピストン５が
略水平に摺動自在に嵌合され、このピストン５の
頂面に対面してシリンダヘツド２に燃焼室６が形
成される。燃焼室６には、吸気弁口７と排気弁口
８とが上下に相対向して開口され、それらの弁口
７，８は、シリンダヘツド２に摺動自在に支持さ
れる吸気弁９と排気弁１０によつて開閉され、吸
気弁９と排気弁１０は従来公知の動弁機構１１に
よつて作動される。前記吸、排気弁口７，８に
は、シリンダヘツド２に形成した吸、排気ポート
１２，１３がそれぞれ連通され、吸気ポート１２
の他端は、シリンダヘツド２の上面に形成される
吸気管Inの取付座１４に開口され、また排気ポー
ト１２の他端はシリンダヘツド２の下面に開口さ
れる排気管Exの取付座１５に開口される。吸気
ポート１２の他端は、シリンダヘツド２の上面に
形成される、吸気管Inの取付座１４に開口され、
また排気ポート１３の他端はシリンダヘツド２の
下面に形成される排気管Exの取付座１５に開口
される。 In FIG. 1, the engine body E of the engine includes a cylinder block 1 having a substantially horizontal cylinder axis.
and a cylinder head 2 fixed to the end face of the block 1 via a gasket 3. A piston 5 is slidably fitted substantially horizontally into the cylinder hole 4 of the cylinder block 1, and a combustion chamber 6 is formed in the cylinder head 2 facing the top surface of the piston 5. An intake valve port 7 and an exhaust valve port 8 are opened in the combustion chamber 6 and are vertically opposed to each other. The intake valve 9 and the exhaust valve 10 are opened and closed by an exhaust valve 10, and the intake valve 9 and the exhaust valve 10 are operated by a conventionally known valve operating mechanism 11. The intake and exhaust valve ports 7 and 8 communicate with intake and exhaust ports 12 and 13 formed in the cylinder head 2, respectively.
The other end of the exhaust port 12 is opened to a mounting seat 14 of an intake pipe In formed on the upper surface of the cylinder head 2, and the other end of the exhaust port 12 is opened to a mounting seat 15 of an exhaust pipe Ex formed on the lower surface of the cylinder head 2. It is opened. The other end of the intake port 12 is opened to a mounting seat 14 of the intake pipe In formed on the upper surface of the cylinder head 2.
The other end of the exhaust port 13 is opened to a mounting seat 15 of an exhaust pipe Ex formed on the lower surface of the cylinder head 2.
前記シリンダヘツド２上面の取付座１４には、
吸気管In端部の取付フランジ１６が連結ボルトを
以て結合され、またシリンダヘツド２下面の取付
座１５には排気管Ex端部の取付フランジ１７が
連結ボルトを以て結合される。またシリンダブロ
ツク１上において、吸気管Inの途中には、気化器
Caが介在され、さらにその端部にエアクリーナ
Acが接続される。 The mounting seat 14 on the top surface of the cylinder head 2 includes:
A mounting flange 16 at the end of the intake pipe In is coupled with a connecting bolt, and a mounting flange 17 at the end of the exhaust pipe Ex is coupled to the mounting seat 15 on the lower surface of the cylinder head 2 using a connecting bolt. Also, on the cylinder block 1, there is a carburetor in the middle of the intake pipe In.
Ca is interposed, and an air cleaner is added to its end.
AC is connected.
第２，３図に示すように、シリンダヘツド２に
は、二次エア通路１８が穿設される。この二次エ
ア通路１８はシリンダヘツド２の上面より下向き
に略垂直に穿設される第１通路１８1と、シリン
ダヘツド２の側面より斜めに穿設される第２通路
１８2とよりなり、この第２通路１８2の開口外端
は盲栓３０によつて閉じられる。二次エア通路１
８の内端は、前記排気ポート１３の、燃焼室６近
傍部に連通され、またその外端はシリンダブロツ
ク１上の吸気管Inの取付座１４の端部に開口され
る。而して前記二次エア通路１８の外端、すなわ
ち前記取付座１４側開口端には、２つの段部１
９，２０を有して２段階に径を大きくした差込孔
２１が形成され、この差込孔２１は、吸気管Inの
取付座１４端部に開口し、またその一側には、シ
リンダヘツド２の、シリンダブロツク１側内面に
開口する切欠孔２２が連通される。 As shown in FIGS. 2 and 3, the cylinder head 2 is provided with a secondary air passage 18. This secondary air passage 18 consists of a first passage 18 1 which is bored downward and substantially vertically from the upper surface of the cylinder head 2, and a second passage 18 2 which is bored diagonally from the side surface of the cylinder head 2. The open outer end of this second passage 18 2 is closed by a blind plug 30 . Secondary air passage 1
The inner end of the exhaust port 8 communicates with the vicinity of the combustion chamber 6, and the outer end thereof is opened at the end of the mounting seat 14 of the intake pipe In on the cylinder block 1. Two step portions 1 are provided at the outer end of the secondary air passage 18, that is, at the open end on the side of the mounting seat 14.
An insertion hole 21 is formed with holes 9 and 20 whose diameters are increased in two stages, and this insertion hole 21 opens at the end of the mounting seat 14 of the intake pipe In, and on one side thereof, a cylinder A notch hole 22 opening on the inner surface of the head 2 on the side of the cylinder block 1 is communicated with the head 2 .
前記二次エア通路１８の差込孔２１には二次エ
アフイードパイプＰのジヨイント２４が抜差自在
に差込み接続される。前記二次エアフイードパイ
プＰは第１，６図に示すように鋼管等の金属パイ
プ２３をシリンダブロツク１の上面に沿うように
屈曲させ、その先端に略直角に前記ジヨイント２
４を固着して構成され、前記ジヨイント２４は前
記切欠孔２２を通して二次エア通路１８の差込孔
２１に抜差自在に挿嵌される。また二次エアフイ
ードパイプＰの基端は可撓性導管２５を介して逆
止弁、すなわちリード弁２６の出口に接続され、
さらに該リード弁２６の入口は前記吸気系のエア
クリーナAcのクリーン側に連通される。 A joint 24 of a secondary air feed pipe P is inserted into and connected to the insertion hole 21 of the secondary air passage 18 so as to be freely inserted and removed. As shown in FIGS. 1 and 6, the secondary air feed pipe P is made by bending a metal pipe 23 such as a steel pipe along the upper surface of the cylinder block 1, and inserting the joint 2 at a substantially right angle to the tip thereof.
The joint 24 is inserted through the notch hole 22 into the insertion hole 21 of the secondary air passage 18 in a manner that it can be freely inserted and removed. Further, the base end of the secondary air feed pipe P is connected to the outlet of a check valve, that is, a reed valve 26 via a flexible conduit 25,
Furthermore, the inlet of the reed valve 26 is communicated with the clean side of the air cleaner Ac of the intake system.
而して前記リード弁２６はエアをエアクリーナ
Acから排気ポート１３へのみ流れるように作用
し、機関の運転時に排気ポート１３内に発生する
排気脈動によりエアクリーナAcからの清浄な二
次エアを、リード弁２６、可撓性導管２５、二次
エアフイードパイプＰ、および二次エア通路１８
を通して排気ポート１３へ間歇的に導入する。 Therefore, the reed valve 26 directs the air to the air cleaner.
It acts to flow only from AC to the exhaust port 13, and the exhaust pulsation generated in the exhaust port 13 when the engine is operating causes clean secondary air from the air cleaner Ac to flow through the reed valve 26, the flexible conduit 25, and the secondary air. Air feed pipe P and secondary air passage 18
The air is intermittently introduced into the exhaust port 13 through the air.
第４図に示すように前記吸気管Inの取付フラン
ジ１６の端部には、抑え部１６ａが一体に延設さ
れており、該取付フランジ１６を、機関本体Ｅの
シリンダヘツド２上面に連結ボルトを以て連結し
た際に、前記抑え部１６ａは、前記二次エアフイ
ードパイプＰのジヨイント２４上面に当接され、
該ジヨイント２４を固定することができる。 As shown in FIG. 4, a restraining portion 16a is integrally extended at the end of the mounting flange 16 of the intake pipe In, and the mounting flange 16 is connected to the upper surface of the cylinder head 2 of the engine body E by connecting bolts. When connected with
The joint 24 can be fixed.
第１，５図に示すように前記二次エアフイード
パイプＰの途中はシリンダブロツク１の上面に着
脱可能に保持される。すなわちシリンダブロツク
１の上面には断面チヤンネル状の台座２７が一体
に突設され、この台座２７には断面Ｍ状のマウン
トラバー２８が被冠される。マウントラバー２８
に形成される挟持溝２９には前記二次エアフイー
ドパイプＰの途中が抜差自在に差込み挟持され
る。而してこのように二次エアフイードパイプＰ
の途中をマウントラバー２８により挟持すること
により該パイプＰは両持ち支持されることにな
り、そのジヨイント２４の付根部の、振動による
応力集中を防止することができ、またマウントラ
バー２８は二次エアフイードパイプＰに作用する
振動を減衰してジヨイント２４部に与える振動の
影響を小さくすることが可能である。 As shown in FIGS. 1 and 5, a middle portion of the secondary air feed pipe P is detachably held on the upper surface of the cylinder block 1. That is, a pedestal 27 having a channel-shaped cross section is integrally provided on the upper surface of the cylinder block 1, and a mount rubber 28 having an M-shaped cross section is mounted on the pedestal 27. Mount rubber 28
A middle portion of the secondary air feed pipe P is inserted and held in the holding groove 29 formed in the holding groove 29 so as to be freely inserted and removed. In this way, the secondary air feed pipe P
By sandwiching the pipe P with the mount rubber 28 in the middle, the pipe P is supported on both sides, and stress concentration due to vibration at the base of the joint 24 can be prevented, and the mount rubber 28 is It is possible to attenuate the vibrations acting on the air feed pipe P and reduce the influence of vibrations on the joint 24 portion.
次に本考案の実施例の作用について説明する。 Next, the operation of the embodiment of the present invention will be explained.
いま内燃機関が運転によりその排気ポート１３
に排気脈動が発生すると、これにより該ポート１
３内には間歇的な吸気負圧が発生する。この吸気
負圧は、二次エア通路１８、二次エアフイードパ
イプＰおよび導管２５を通してリード弁２６に作
用して該リード弁２６を間歇的に開弁する。これ
によりエアクリーナAc内の清浄な二次エアは、
リード弁２６、導管２５、二次エアフイードパイ
プＰおよび二次エア通路１８を通つて排気ポート
１３内へ吸込まれる。排気ポート１３内に流入し
た二次エアは、排気管Exを流れる排ガス中に混
入し、排ガス中に含まれるHC，CO等の可燃有害
成分を酸化消去することができる。 Now that the internal combustion engine is operating, its exhaust port 13
When exhaust pulsation occurs in port 1, this causes
3, intermittent negative intake pressure occurs. This intake negative pressure acts on the reed valve 26 through the secondary air passage 18, the secondary air feed pipe P, and the conduit 25, and opens the reed valve 26 intermittently. As a result, the clean secondary air inside the air cleaner AC is
It is drawn into the exhaust port 13 through the reed valve 26, the conduit 25, the secondary air feed pipe P and the secondary air passage 18. The secondary air that has flowed into the exhaust port 13 is mixed into the exhaust gas flowing through the exhaust pipe Ex, and can oxidize and eliminate combustible harmful components such as HC and CO contained in the exhaust gas.
なお、上記実施例では二次エアフイードパイプ
Ｐのジヨイント２４を吸気管Inの取付フランジ１
６によつて固着するようにしたものを説明した
が、前記ジヨイント２４を排気管Exの取付フラ
ンジによつて固着するようにしてもよい。 In the above embodiment, the joint 24 of the secondary air feed pipe P is connected to the mounting flange 1 of the intake pipe In.
6 has been described, but the joint 24 may be fixed by a mounting flange of the exhaust pipe Ex.
以上の実施例により明らかなように本考案によ
れば、機関本体に、排気ポートに連通する二次エ
ア通路を穿設し、該通路の開口端に、逆止弁を介
して大気に連通するエアフイードパイプのジヨイ
ントを抜差自在に接続し、該ジヨイントを、機関
本体に固着される吸気管、もしくは排気管端部の
取付フランジを以て固定したので、前記ジヨイン
トを単独で機関本体に固定するためのボルト、ナ
ツト等の固着具が不要となり従来の二次エアフイ
ードパイプのジヨイントを単独で機関本体に固定
するようにしたものに比べて部品点数が削減され
るとともに二次エアフイードパイプの組付がきわ
めて簡単となり、その結果大幅なコストダウンが
可能となるばかりでなく、機関全体の重量軽減に
寄与し得る。 As is clear from the above embodiments, according to the present invention, a secondary air passage is provided in the engine body and communicates with the exhaust port, and the open end of the passage communicates with the atmosphere via a check valve. The joint of the air feed pipe is removably connected, and the joint is fixed with a mounting flange at the end of the intake pipe or exhaust pipe fixed to the engine body, so that the joint can be fixed independently to the engine body. Fasteners such as bolts and nuts are not required, and the number of parts is reduced compared to the conventional method in which the joint of the secondary air feed pipe is fixed to the engine body independently, and the assembly of the secondary air feed pipe is simplified. This makes it extremely simple, and as a result, it not only becomes possible to significantly reduce costs, but also contributes to reducing the weight of the entire engine.
尚、前記実施例のように二次エアフイードパイ
プを吸気管の取付フランジによつて固定するよう
にすれば、前記ジヨイントとエアクリーナ間の距
離が短くなり二次エアフイードパイプの全長を短
くできる利点がある。 Incidentally, if the secondary air feed pipe is fixed by the mounting flange of the intake pipe as in the above embodiment, the distance between the joint and the air cleaner is shortened, which has the advantage that the overall length of the secondary air feed pipe can be shortened. There is.
図面は本考案装置の実施例を示すもので、第１
図は本考案装置を備えた水平対向型内燃機関頭部
の縦断面図、第２図は第１図−線に沿うシリ
ンダヘツドの断面図、第３図は第１図−線よ
りみたシリンダヘツドの部分上面図、第４図は第
１図−線よりみた吸気管の取付フランジの端
面図、第５図は第１図−線断面図、第６図は
二次エアフイードパイプの側面図である。
Ｅ……機関本体、In……吸気管、Ex……排気
管、Ｐ……二次エアフイードパイプ、１２……吸
気ポート、１３……排気ポート、１６……取付フ
ランジ、１８……二次エア通路、２４……ジヨイ
ント、２６……リード弁（逆止弁）。
The drawings show an embodiment of the device of the present invention.
The figure is a longitudinal sectional view of the head of a horizontally opposed internal combustion engine equipped with the device of the present invention, Figure 2 is a sectional view of the cylinder head taken along the line in Figure 1, and Figure 3 is the cylinder head seen from the line in Figure 1. 4 is an end view of the mounting flange of the intake pipe taken along the line in Figure 1, Figure 5 is a sectional view taken along the line in Figure 1, and Figure 6 is a side view of the secondary air feed pipe. be. E...Engine body, In...Intake pipe, Ex...Exhaust pipe, P...Secondary air feed pipe, 12...Intake port, 13...Exhaust port, 16...Mounting flange, 18...Secondary Air passage, 24...joint, 26...reed valve (check valve).
Claims (1)
ンジをそれぞれ固着し、燃焼室に通じる吸気ポー
トおよび排気ポートの開口端を前記吸気管および
排気管にそれぞれ連通してなる、内燃機関におい
て、前記機関本体に、前記排気ポートに連通する
二次エア通路を穿設し、該通路の開口端に、逆止
弁を介して大気に連通する二次エアフイードパイ
プのジヨイントを抜差自在に接続し、該ジヨイン
トを、機関本体に固着される、吸気管、もしくは
排気管端部の前記取付フランジを以て固定したこ
とを特徴とする内燃機関における排気浄化用エア
フイードパイプ取付装置。 In an internal combustion engine, mounting flanges at ends of an intake pipe and an exhaust pipe are respectively fixed to the engine body, and open ends of the intake port and exhaust port communicating with the combustion chamber are communicated with the intake pipe and the exhaust pipe, respectively. A secondary air passage communicating with the exhaust port is bored in the main body, and a joint of a secondary air feed pipe communicating with the atmosphere is connected to the open end of the passage via a check valve so as to be freely removable. An air feed pipe mounting device for exhaust gas purification in an internal combustion engine, characterized in that the joint is fixed by the mounting flange at the end of an intake pipe or exhaust pipe, which is fixed to the engine body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10055883U JPS608413U (en) | 1983-06-29 | 1983-06-29 | Air feed pipe installation device for exhaust purification in internal combustion engines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10055883U JPS608413U (en) | 1983-06-29 | 1983-06-29 | Air feed pipe installation device for exhaust purification in internal combustion engines |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS608413U JPS608413U (en) | 1985-01-21 |
| JPS6338331Y2 true JPS6338331Y2 (en) | 1988-10-11 |
Family
ID=30237828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10055883U Granted JPS608413U (en) | 1983-06-29 | 1983-06-29 | Air feed pipe installation device for exhaust purification in internal combustion engines |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS608413U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5874244B2 (en) * | 2011-08-29 | 2016-03-02 | スズキ株式会社 | Secondary air supply device for internal combustion engine |
-
1983
- 1983-06-29 JP JP10055883U patent/JPS608413U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS608413U (en) | 1985-01-21 |
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