JPH1113461A - Exhaust gas emission control device in multi-cylinder internal combustion engine - Google Patents
Exhaust gas emission control device in multi-cylinder internal combustion engineInfo
- Publication number
- JPH1113461A JPH1113461A JP9168748A JP16874897A JPH1113461A JP H1113461 A JPH1113461 A JP H1113461A JP 9168748 A JP9168748 A JP 9168748A JP 16874897 A JP16874897 A JP 16874897A JP H1113461 A JPH1113461 A JP H1113461A
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- case
- gas outlet
- catalyst
- outlet pipe
- 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
Links
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)
- Exhaust Gas After Treatment (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、多気筒内燃機関に
おいて、その各気筒からの排気ガスを、触媒を内蔵した
一つの触媒ケース内において浄化するようにした排気ガ
ス浄化装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust gas purifying apparatus for purifying exhaust gas from each cylinder of a multi-cylinder internal combustion engine in one catalyst case containing a catalyst.
【０００２】[0002]
【従来の技術】従来、この種の排気ガス浄化装置は、例
えば、実公昭６１−１４５６８号公報等に記載されてい
るように、触媒を内蔵した触媒ケースの上部におけるヘ
ッド室に、各気筒からの排気ガス出口管を接続する一
方、前記触媒ケースの下部に、排気ガスの排出管を設け
て、前記触媒ケースの上部におけるヘッド室内に導入し
た排気ガスを、触媒ケース内の触媒に接触することによ
って浄化するように構成している。2. Description of the Related Art Conventionally, as described in Japanese Utility Model Publication No. 61-14568, for example, this type of exhaust gas purifying apparatus has a structure in which a head chamber above a catalyst case containing a catalyst is provided from each cylinder. The exhaust gas outlet pipe is connected to the exhaust gas outlet pipe at the lower part of the catalyst case, and the exhaust gas introduced into the head chamber at the upper part of the catalyst case is brought into contact with the catalyst in the catalyst case. It is configured to purify.
【０００３】しかし、最近の排気ガス浄化装置では、軽
量化及び低コスト化を図るために、その触媒ケースを、
従来のように鋳造製にすることに代えて金属板をプレス
加工することによって製作すること、つまり、触媒ケー
スをプレス加工による板金製にすることが行われてい
る。However, in recent exhaust gas purifying apparatuses, in order to reduce the weight and cost, a catalyst case is required.
2. Description of the Related Art Instead of casting, a metal plate is manufactured by pressing, that is, a catalyst case is formed by pressing a sheet metal.
【０００４】[0004]
【発明が解決しようとする課題】しかし、触媒ケース
を、前記したようにプレス加工による板金製にする場合
には、この触媒ケースを左右二つ割りのケース片にて分
割して、この両ケース片の各々を、金属板をプレス加工
にて形成したのち、この両ケース片を互いに合わせて溶
接等により一体的に接合した構成にしているから、以下
に述べるような問題があった。However, when the catalyst case is made of sheet metal by press working as described above, the catalyst case is divided into two right and left case pieces. Each of them has a configuration in which a metal plate is formed by press working and then the two case pieces are joined together and integrally joined by welding or the like. Therefore, there are the following problems.
【０００５】すなわち、前記触媒ケースの上部には、各
気筒からの排気ガス出口管を接続する必要があることに
加えて、排気ガスの浄化制御に際して排気ガス中の酸素
濃度を検出するためのＯ２センサーの取付け座を設ける
ことが必要であるが、従来の板金製の触媒ケースでは、
その二つ割りのケース片の各々に各気筒からの排気ガス
出口管を接続するように構成しているので、その触媒ケ
ースの上部に、前記Ｏ２センサーの取付け座を設けるに
は、当該触媒ケースの上部を、これに前記Ｏ２センサー
の取付け座を設ける分だけ大きくしなければならず、従
って、触媒ケースの大型化、ひいては、排気ガス浄化装
置の大型化を招来するのであった。That is, in addition to the need to connect exhaust gas outlet pipes from each cylinder to the upper part of the catalyst case, O2 for detecting the oxygen concentration in the exhaust gas during exhaust gas purification control is required. It is necessary to provide a sensor mounting seat, but in the case of a conventional sheet metal catalyst case,
Since the exhaust gas outlet pipes from the respective cylinders are connected to each of the split case pieces, in order to provide the O2 sensor mounting seat on the upper part of the catalyst case, the upper part of the catalyst case is required. Must be increased by the size of the mounting seat for the O2 sensor, which results in an increase in the size of the catalyst case and, in turn, an increase in the size of the exhaust gas purification device.
【０００６】本発明は、触媒ケースを板金製にする場合
に、前記の問題を解消することを技術的課題とするもの
である。An object of the present invention is to solve the above-mentioned problems when the catalyst case is made of sheet metal.
【０００７】[0007]
【課題を解決するための手段】この技術的課題を達成す
るため本発明は、「下部に排気ガスの排出管を備えると
共に触媒を内蔵した触媒ケースを、金属板製の左右二つ
割りのケース片を合わせ接合して構成にする一方、前記
触媒ケースの上部に、内燃機関における各気筒からの排
気ガス出口管を接続すると共に、Ｏ２センサーの取付け
座とを設けて成る浄化装置において、前記各気筒のうち
一つの気筒からの排気ガス出口管を、前記触媒ケースに
おける両ケース片の接合部に、両ケース片にて挟むよう
にして接続する一方、前記各気筒のうち残りの他の気筒
からの排気ガス出口管を一つの排気ガス出口管に纏めて
前記両ケース片のうち一方のケース片に接続し、他方の
ケース片に、前記Ｏ２センサーの取付け座を設ける。」
と言う構成にした。In order to achieve this technical object, the present invention provides a catalyst case having an exhaust gas exhaust pipe at the bottom and a built-in catalyst, and a metal plate made of left and right case pieces. On the other hand, the exhaust gas outlet pipe from each cylinder in the internal combustion engine is connected to the upper part of the catalyst case, and a mounting seat for an O2 sensor is provided on the upper part of the catalyst case. An exhaust gas outlet pipe from one of the cylinders is connected to a junction of the two case pieces in the catalyst case so as to be sandwiched between the two case pieces, while an exhaust gas outlet from the remaining other one of the cylinders is provided. The pipes are combined into one exhaust gas outlet pipe, connected to one of the two case pieces, and the other case piece is provided with a mounting seat for the O2 sensor. "
It was configured to say.
【０００８】[0008]
【発明の作用・効果】本発明は、前記したように構成す
ることにより、触媒ケースにおける両ケース片の接合部
を一つの気筒からの排気ガス出口管を接続することに、
両ケースのうち一方のケース片を他の気筒からの排気ガ
ス出口管を接続することに、そして、他方のケース片を
Ｏ２センサーの取付け座を設けることに各々利用するも
のであって、触媒ケースを板金製にする場合に、この触
媒ケースの上部を、これに各気筒からの排気ガス出口管
を接続することに加えてＯ２センサーの取付け座を設け
る分だけ大きくすることを回避できるから、触媒ケース
の小型・軽量化、ひいては、排気ガス浄化装置の小型・
軽量化を達成できる効果を有する。According to the present invention, the joint between the two case pieces in the catalyst case is connected to the exhaust gas outlet pipe from one cylinder.
One of the two cases is used for connecting an exhaust gas outlet pipe from another cylinder, and the other case is used for providing a mounting seat for an O2 sensor. Is made of sheet metal, it is possible to avoid increasing the size of the upper part of the catalyst case by the amount provided with the O2 sensor mounting seat in addition to the connection of the exhaust gas outlet pipe from each cylinder to the catalyst case. The case is smaller and lighter, and the exhaust gas purifier is smaller and smaller.
It has the effect of achieving weight reduction.
【０００９】[0009]
【発明の実施の形態】以下、本発明の実施の形態を、図
１〜図７の図面について説明する。この図において、符
号１は、三つの気筒Ａ１，Ａ２，Ａ３を有する三気筒内
燃機関を、符号２は、前記内燃機関１に対する排気ガス
浄化装置を各々示す。前記排気ガス浄化装置２は、モノ
リス型の触媒４を内蔵した断面楕円形の一つの触媒ケー
ス３と、前記内燃機関１に対して、その各気筒Ａ１，Ａ
２，Ａ３からの排気ポート12の各々に連通するようにフ
ランジ部11にて接続された三本の排気ガス出口管５，
６，７と、前記触媒ケース３からの排気ガス排出管８と
によって構成されている。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to FIGS. In this figure, reference numeral 1 denotes a three-cylinder internal combustion engine having three cylinders A1, A2, A3, and reference numeral 2 denotes an exhaust gas purification device for the internal combustion engine 1, respectively. The exhaust gas purifying device 2 is provided with a single catalyst case 3 having an elliptical cross section in which a monolithic catalyst 4 is incorporated, and a cylinder A1, A
2, three exhaust gas outlet pipes 5 connected at the flange portion 11 so as to communicate with the respective exhaust ports 12 from A3.
6 and 7 and an exhaust gas discharge pipe 8 from the catalyst case 3.
【００１０】そして、触媒ケース３は、その縦方向の中
心線を含む平面にて左右二つのケース片３ａ，３ｂに分
割され、その各々のケース片３ａ，３ｂを、金属板をプ
レス加工にてその周囲に外向きフランジ３ａ′，３ｂ′
を一体的に設けて形成し、次いで、この二つのケース片
３ａ，３ｂを、そのフランジ３ａ′，３ｂ′が互いに密
接するように合わせたのち、フランジ３ａ′，３ｂ′同
志を溶接することにより、一体的に接合したものに構成
されている。The catalyst case 3 is divided into two left and right case pieces 3a and 3b on a plane including the vertical center line, and each of the case pieces 3a and 3b is formed by pressing a metal plate. Outward flanges 3a ', 3b'
Then, the two case pieces 3a, 3b are fitted together so that their flanges 3a ', 3b' are in close contact with each other, and then the flanges 3a ', 3b' are welded together. , Are integrally joined.
【００１１】そして、前記触媒ケース３における両ケー
ス片３ａ，３ｂを前記したように合わせ接合するとき、
両ケース３ａ，３ｂの接合部のうち上部に、前記各気筒
Ａ１，Ａ２，Ａ３のうち第１気筒Ａ１からの排気ガス出
口管５を、下部に前記排気ガス排出管８を各々挟んだの
ち溶接することにより接続する。また、前記各気筒Ａ
１，Ａ２，Ａ３のうち第３気筒Ａ３からの排気ガス出口
管７に、第２気筒Ａ２からの排気ガス出口管６を合流し
たのち、この第３気筒Ａ３からの排気ガス出口管７を、
前記触媒ケース３における両ケース片３ａ，３ｂのうち
一方のケース片３ａの上部に対して接続する。なお、こ
の接続は、前記一方のケース片３ａの一体的に形成した
ソケット管部９に、前記排気ガス出口管７を挿入したの
ち溶接することによって行う。When the two case pieces 3a and 3b of the catalyst case 3 are joined and joined as described above,
The exhaust gas outlet pipe 5 from the first cylinder A1 of the cylinders A1, A2 and A3 is welded to the upper part of the joint between the two cases 3a and 3b, and the exhaust gas discharge pipe 8 is sandwiched to the lower part. To connect. Further, each of the cylinders A
After joining the exhaust gas outlet pipe 6 from the second cylinder A2 to the exhaust gas outlet pipe 7 from the third cylinder A3 among the exhaust gas outlet pipe 7 from the third cylinder A3,
It is connected to the upper part of one of the case pieces 3a and 3b in the catalyst case 3. This connection is made by inserting the exhaust gas outlet pipe 7 into the integrally formed socket pipe section 9 of the one case piece 3a and then welding.
【００１２】更にまた、前記触媒ケース３における両ケ
ース片３ａ，３ｂのうち他方のケース片３ｂの上部に
は、脹らみ部13を一体的に形成して、この脹らみ部13の
上面に、Ｏ２センサーの取付け座１０を溶接にて固着し
て設ける。このように構成することにより、触媒ケース
３における両ケース片３ａ，３ｂの接合部を第１気筒Ａ
１からの排気ガス出口管５を接続することに、両ケース
片３ａ，３ｂのうち一方のケース片３ａを他の気筒Ａ
２，Ａ３からの排気ガス出口管７を接続することに、そ
して、他方のケース片３ｂをＯ２センサーの取付け座１
０を設けることに各々利用することができるから、触媒
ケース３を板金製にする場合に、この触媒ケースの上部
を、これに各気筒Ａ１，Ａ２，Ａ３からの排気ガス出口
管５，６，７を接続することに加えてＯ２センサーの取
付け座１０を設ける分だけ大きくすることを回避できる
のである。Further, an bulging part 13 is integrally formed on the upper part of the other case piece 3b of the two case pieces 3a and 3b in the catalyst case 3, and an upper surface of the bulging part 13 is formed. The O2 sensor mounting seat 10 is fixedly provided by welding. With this configuration, the joint portion between the two case pieces 3a and 3b in the catalyst case 3 is connected to the first cylinder A.
1 is connected to the other cylinder A by connecting one of the case pieces 3a and 3b to the other cylinder A.
2, connecting the exhaust gas outlet pipe 7 from A3, and connecting the other case piece 3b to the O2 sensor mounting seat 1.
0, it is possible to use each of them. When the catalyst case 3 is made of sheet metal, the upper part of the catalyst case is connected to the exhaust gas outlet pipes 5, 6, 6 from the cylinders A1, A2, A3. 7, it is possible to avoid increasing the size by the provision of the O2 sensor mounting seat 10 in addition to the connection.
【００１３】なお、前記実施の形態は、三気筒内燃機関
に適用した場合を示したが、本発明は、これに限らず、
四気筒内燃機関の場合には、第１気筒からの排気ガス出
口管を、触媒ケースにおける両ケース片の接合部に、第
４気筒からの排気ガス出口管に第２及び第３からの排気
ガス出口管を合流し、この第４気筒からの排気ガス出口
管を、触媒ケースにおける両ケース片のうち一方のケー
ス片に接続すると言う構成にすれば良く、同様にして、
他の多気筒内燃機関に対しても適用できることは言うま
でもない。Although the above-described embodiment has shown the case where the present invention is applied to a three-cylinder internal combustion engine, the present invention is not limited to this.
In the case of a four-cylinder internal combustion engine, the exhaust gas outlet pipe from the first cylinder is connected to the joint of the two case pieces in the catalyst case, and the exhaust gas outlet pipe from the fourth cylinder to the exhaust gas outlet pipe from the fourth cylinder. The outlet pipe may be merged, and the exhaust gas outlet pipe from the fourth cylinder may be connected to one of the two case pieces in the catalyst case.
It goes without saying that the present invention can be applied to other multi-cylinder internal combustion engines.
【図１】本発明の実施の形態を示す正面図である。FIG. 1 is a front view showing an embodiment of the present invention.
【図２】図１の平面図である。FIG. 2 is a plan view of FIG.
【図３】図１の右側面図である。FIG. 3 is a right side view of FIG. 1;
【図４】図２のIV−IV視断面図である。FIG. 4 is a sectional view taken along line IV-IV of FIG. 2;
【図５】図２のＶ−Ｖ視断面図である。FIG. 5 is a sectional view taken along line VV of FIG. 2;
【図６】図１のVI−VI視断面図である。FIG. 6 is a sectional view taken along line VI-VI of FIG.
【図７】図１のVII −VII 視断面図である。FIG. 7 is a sectional view taken along line VII-VII of FIG. 1;
１ 内燃機関 Ａ１，Ａ２，Ａ３ 気筒 ２ 排気ガス浄化装置 ３ 触媒ケース ４ 触媒 ５，６，７ 排気ガス出口管 ８ 排気ガス排出管 １０ ０２センサーの取付け座 DESCRIPTION OF SYMBOLS 1 Internal-combustion engine A1, A2, A3 cylinder 2 Exhaust gas purifier 3 Catalyst case 4 Catalyst 5, 6, 7 Exhaust gas outlet pipe 8 Exhaust gas exhaust pipe 10 02 Sensor mounting seat
Claims (1)
媒を内蔵した触媒ケースを、金属板製の左右二つ割りの
ケース片を合わせ接合して構成にする一方、前記触媒ケ
ースの上部に、内燃機関における各気筒からの排気ガス
出口管を接続すると共に、Ｏ２センサーの取付け座とを
設けて成る浄化装置において、 前記各気筒のうち一つの気筒からの排気ガス出口管を、
前記触媒ケースにおける両ケース片の接合部に、両ケー
ス片にて挟むようにして接続する一方、前記各気筒のう
ち残りの他の気筒からの排気ガス出口管を一つの排気ガ
ス出口管に纏めて前記両ケース片のうち一方のケース片
に接続し、他方のケース片に、前記Ｏ２センサーの取付
け座を設けたことを特徴とする多気筒内燃機関における
排気ガス浄化装置。1. A catalyst case having an exhaust gas exhaust pipe at a lower part and a catalyst built therein is formed by joining left and right case pieces made of a metal plate into two parts, and an upper part of the catalyst case is provided with an internal combustion engine. An exhaust gas outlet pipe from one of the cylinders is connected to an exhaust gas outlet pipe from each cylinder in the engine and provided with a mounting seat for an O2 sensor.
At the junction of the two case pieces in the catalyst case, they are connected so as to be sandwiched between the two case pieces, and the exhaust gas outlet pipes from the other cylinders among the cylinders are combined into one exhaust gas outlet pipe. An exhaust gas purifying apparatus for a multi-cylinder internal combustion engine, characterized in that one of the two case pieces is connected to one of the case pieces, and the other case piece is provided with a mounting seat for the O2 sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16874897A JP3431803B2 (en) | 1997-06-25 | 1997-06-25 | Exhaust gas purifier in a multi-cylinder internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16874897A JP3431803B2 (en) | 1997-06-25 | 1997-06-25 | Exhaust gas purifier in a multi-cylinder internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1113461A true JPH1113461A (en) | 1999-01-19 |
| JP3431803B2 JP3431803B2 (en) | 2003-07-28 |
Family
ID=15873699
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16874897A Expired - Fee Related JP3431803B2 (en) | 1997-06-25 | 1997-06-25 | Exhaust gas purifier in a multi-cylinder internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3431803B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101956598A (en) * | 2010-10-09 | 2011-01-26 | 奇瑞汽车股份有限公司 | Exhaust manifold and exhaust system employing same |
| CN104594988A (en) * | 2014-12-10 | 2015-05-06 | 安徽江淮汽车股份有限公司 | Gasoline engine catalyst |
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|---|---|---|---|---|
| JPH0538316U (en) * | 1991-10-25 | 1993-05-25 | カルソニツク株式会社 | Manifold converter |
| JPH0783049A (en) * | 1993-09-16 | 1995-03-28 | Toyota Motor Corp | Exhaust manifold and exhaust device of engine |
| JPH0886216A (en) * | 1994-09-19 | 1996-04-02 | Nissan Motor Co Ltd | Catalytic converter device having oxygen sensor for internal combustion engine |
| JPH09236012A (en) * | 1996-02-29 | 1997-09-09 | Calsonic Corp | Manifold converter |
| JPH09280039A (en) * | 1996-04-10 | 1997-10-28 | Yutaka Giken Co Ltd | Exhaust manifold with o2 sensor |
-
1997
- 1997-06-25 JP JP16874897A patent/JP3431803B2/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0538316U (en) * | 1991-10-25 | 1993-05-25 | カルソニツク株式会社 | Manifold converter |
| JPH0783049A (en) * | 1993-09-16 | 1995-03-28 | Toyota Motor Corp | Exhaust manifold and exhaust device of engine |
| JPH0886216A (en) * | 1994-09-19 | 1996-04-02 | Nissan Motor Co Ltd | Catalytic converter device having oxygen sensor for internal combustion engine |
| JPH09236012A (en) * | 1996-02-29 | 1997-09-09 | Calsonic Corp | Manifold converter |
| JPH09280039A (en) * | 1996-04-10 | 1997-10-28 | Yutaka Giken Co Ltd | Exhaust manifold with o2 sensor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101956598A (en) * | 2010-10-09 | 2011-01-26 | 奇瑞汽车股份有限公司 | Exhaust manifold and exhaust system employing same |
| CN104594988A (en) * | 2014-12-10 | 2015-05-06 | 安徽江淮汽车股份有限公司 | Gasoline engine catalyst |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3431803B2 (en) | 2003-07-28 |
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