JPS6321732Y2 - - Google Patents
Info
- Publication number
- JPS6321732Y2 JPS6321732Y2 JP1983097931U JP9793183U JPS6321732Y2 JP S6321732 Y2 JPS6321732 Y2 JP S6321732Y2 JP 1983097931 U JP1983097931 U JP 1983097931U JP 9793183 U JP9793183 U JP 9793183U JP S6321732 Y2 JPS6321732 Y2 JP S6321732Y2
- Authority
- JP
- Japan
- Prior art keywords
- air
- connector
- air inlet
- carburetor
- wall
- 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 6
- 230000007423 decrease Effects 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 238000009826 distribution Methods 0.000 description 11
- 239000000446 fuel Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Landscapes
- Air Supply (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
Description
【考案の詳細な説明】
［産業上の利用分野］
本考案は、ダウンドラフト型多連式気化器に接
続される、内燃機関のエアコネクタに関するもの
である。Detailed Description of the Invention [Industrial Field of Application] The present invention relates to an air connector for an internal combustion engine, which is connected to a downdraft type multiple carburetor.
［従来の技術］
車輌搭載用内燃機関に装着される多連式気化器
は、一般にサイドドラフト型とダウンドラフト型
とに分類される。サイドドラフト型多連式気化器
では、気化器のエアホーン部に直線、エアクリー
ナを取付けても機関の全高が増大しないので、通
常、気化器のエアホーン部にエアクリーナを直接
装着している。このため、サイドドラフト型多連
式気化器では、エアフイルタで整流された直後の
弱い空気流が各気化器のエアホーン部の周囲全体
から気化器に供給され、各気化器にほぼ同量の空
気が偏りなく供給される。[Prior Art] Multiple carburetors installed in internal combustion engines for vehicles are generally classified into side draft type and down draft type. In a side draft type multiple carburetor, the air cleaner is usually mounted directly on the air horn of the carburetor because the overall height of the engine does not increase even if the air cleaner is mounted straight on the air horn of the carburetor. For this reason, in a side draft type multiple carburetor, the weak airflow immediately after being rectified by the air filter is supplied to the carburetor from the entire area around the air horn of each carburetor, and approximately the same amount of air is supplied to each carburetor. Supplied without bias.
これに対し、ダウンドラフト型多連式気化器で
は、気化器直上にエアクリーナを取り付けると機
関の高さが高くなり、車輌の空気抵抗が増大す
る。そこで、機関の高さが高くならないように、
エアクリーナを別置とし、エアクリーナと各気化
器のエアホーン部とをエアコネクタを介して接続
するという構造がとられている（たとえば実開昭
56−34057号公報、実開昭55−146861号公報）。 On the other hand, in a downdraft type multiple carburetor, when an air cleaner is installed directly above the carburetor, the height of the engine increases, which increases the air resistance of the vehicle. Therefore, to prevent the height of the engine from becoming too high,
A structure is adopted in which the air cleaner is placed separately and the air cleaner and the air horn of each carburetor are connected via air connectors (for example,
56-34057, Utility Model Application Publication No. 55-146861).
［考案が解決しようとする問題点］
しかし、実開昭56−34057号公報のような構造
でエアコネクタを介してエアクリーナと気化器と
を接続すると、気化器に供給される空気は方向性
を有しさらに強い流れで流れ出てくる。そして、
この空気流の方向性は各気化器に対して偏向する
傾向にあるので、多連式気化器の各気化器相互間
に吸入空気量のアンバランスが生じる。このアン
バランスは内燃機関の吸入空気量を低減させ、か
つ混合気の空燃比を出力空燃比から外す方向に作
用するので、機関の出力低下を招き、問題とな
る。[Problems to be solved by the invention] However, when the air cleaner and the carburetor are connected via an air connector with the structure as in Japanese Utility Model Application Publication No. 56-34057, the air supplied to the carburetor has no directionality. It flows out with a stronger current. and,
Since the directionality of this air flow tends to be biased toward each carburetor, an imbalance in the amount of intake air occurs between the carburetors of the multiple carburetor. This imbalance reduces the intake air amount of the internal combustion engine and acts in a direction to deviate the air-fuel ratio of the air-fuel mixture from the output air-fuel ratio, resulting in a decrease in engine output, which poses a problem.
また、実開昭55−146861号公報のように、流れ
を整流板を用いて空気流出口の方向に向ける場合
は、整流板の裏側で大きな乱流を生じ、吸気抵抗
を増加させるという問題がある他、整流板設置
分、コストアツプになるという問題がある。 In addition, when directing the flow toward the air outlet using a rectifying plate as in Japanese Utility Model Application Publication No. 55-146861, there is a problem that large turbulent flow is generated behind the rectifying plate, increasing intake resistance. Another problem is that the installation of the rectifier plate increases the cost.
本考案は、上記のような問題を解消するため
に、ダウンドラフト型多連式気化器を有する内燃
機関の各気化器にそれぞれ均等の空気量を供給す
ることができかつ吸気抵抗の増大をほとんど伴な
わないエアコネクタを提供することを目的とする
ものである。 In order to solve the above-mentioned problems, the present invention is capable of supplying an equal amount of air to each carburetor of an internal combustion engine having multiple downdraft type carburetors, while minimizing the increase in intake resistance. The purpose of the present invention is to provide an air connector that does not require an air connector.
［問題点を解決するための手段］
この目的を達成するための、本考案のエアコネ
クタは次のものから成る。すなわち、１つの空気
流入口と複数の空気流出口を有し、下流側に曲壁
部を上流側に直線部を有する左右の側壁と上下壁
とによつて郭定された空気室を有し、空気流入口
から流入する吸入空気を空気室、空気流出口を介
して複数の気化器に同時に供給するダウンドラフ
ト型多連式気化器に接続される内燃機関のエアコ
ネクタにおいて、該エアコネクタの前記左右側壁
の直線部を曲壁部に曲壁部の湾曲に接するように
接続して前記空気室の水平方向の通路断面をエア
コネクタの空気流入口から前記空気流出口に向つ
て漸増させるとともに、前記上壁と下壁との間隔
を前記左右の側壁の直線部の間の部位において前
記空気流入口から空気流出口に向つて漸減させた
ことを特徴とするエアコネクタ。[Means for Solving the Problems] To achieve this objective, the air connector of the present invention consists of the following: That is, it has one air inlet and a plurality of air outlets, and has an air chamber defined by left and right side walls and upper and lower walls, which have a curved wall part on the downstream side and a straight part on the upstream side. , an air connector for an internal combustion engine connected to a downdraft type multiple carburetor that simultaneously supplies intake air flowing in from an air inlet to a plurality of carburetors via an air chamber and an air outlet; The straight portions of the left and right side walls are connected to the curved wall portion so as to be in contact with the curve of the curved wall portion, so that the horizontal passage cross section of the air chamber gradually increases from the air inlet of the air connector toward the air outlet. An air connector characterized in that the distance between the upper wall and the lower wall is gradually decreased from the air inlet to the air outlet at a portion between the straight portions of the left and right side walls.
［作用］
このように水平方向に通路断面積を徐々に大き
くすることにより、吸入空気流速分布が徐々に水
平方向に拡がつて均一化し、空気流の方向性がな
くなり、気化器間で吸入空気量のバランスがくず
れるのが防止される。しかも、上壁、下壁間の間
隔を徐々に狭めつつ水平方向に流れを拡げるので
ほとんど圧力損失を伴なわずに円滑に拡げること
ができ、かつ整流板によらないので整流板裏側の
乱流とその負圧効果による圧力損失もないので、
従来技術に比べて流れの圧力損失が極めて小さ
い。これにより機関の吸入空気量が大となり、ま
た出力空燃比近傍の混合気が供給でき、混合気分
配もよくなつて、これらの総合効果として機関の
出力を向上できる。[Effect] By gradually increasing the cross-sectional area of the passage in the horizontal direction, the intake air flow velocity distribution gradually expands and becomes uniform in the horizontal direction, eliminating the directionality of the air flow and distributing the intake air between the carburetors. This prevents the quantity from becoming unbalanced. Furthermore, since the flow is spread horizontally while gradually narrowing the gap between the upper and lower walls, the flow can be spread smoothly with almost no pressure loss, and since it does not depend on the current plate, turbulent flow can occur on the back side of the current plate. Since there is no pressure loss due to the negative pressure effect,
Flow pressure loss is extremely small compared to conventional technology. This increases the intake air amount of the engine, makes it possible to supply an air-fuel mixture near the output air-fuel ratio, improves the air-fuel mixture distribution, and as a result of these, the output of the engine can be improved.
［実施例］
以下に、本考案のエアコネクタの望ましい実施
例を図面を参照して説明する。[Embodiments] Hereinafter, preferred embodiments of the air connector of the present invention will be described with reference to the drawings.
本考案の一実施例を示す第１図および２図にお
いて、エアコネクタ１は、その内部に１つの空気
室２を有する容器から成る。エアコネクタ１は図
示のように単一容器から成つてもよく、またアツ
パ、ロアの２つの容器の組合せから成つてもよ
い。エアコネクタ１のエアクリーナへの接続側端
部には空気流入口３が形成されている。エアコネ
クタ１は絞られた空気流入口５を介して気化器の
エアホーン部４上に取り付けられ、また、エアコ
ネクタ１の空気流入口３は図示を省略したホース
等を介してエアクリーナに接続される。 In FIGS. 1 and 2 showing an embodiment of the present invention, an air connector 1 consists of a container having one air chamber 2 inside. The air connector 1 may be composed of a single container as shown, or may be composed of a combination of upper and lower containers. An air inlet 3 is formed at the end of the air connector 1 on the side connected to the air cleaner. The air connector 1 is attached to the air horn part 4 of the carburetor via the constricted air inlet 5, and the air inlet 3 of the air connector 1 is connected to the air cleaner via a hose or the like (not shown). .
エアコネクタ１の空気流入口３は一対のエアホ
ーン部４の中央軸線上にあつてエアクリーナ側に
開口している。エアコネクタ１の空気室２を郭定
する一対の左右側壁の直線部６，７は空気流入口
３から気化器エアホーン部４への空気流出口５側
の容器の外周に接する方向に互いに離反するよう
に傾斜して延びている。したがつて、左右側壁の
直線部６，７は複数のエアホーン部４がならぶ方
向に中央軸線に対して左右対称に次第に拡開する
形状をなし、エアホーン部４への空気流出口５側
の容器の外側をまわつている左右側壁の曲壁部
８，９を経て、空気流入口３と反対側の中央軸線
上で連結している。 The air inlet 3 of the air connector 1 is located on the central axis of the pair of air horn sections 4 and opens toward the air cleaner. The straight portions 6 and 7 of the pair of left and right side walls defining the air chamber 2 of the air connector 1 are separated from each other in the direction of contact with the outer periphery of the container on the side of the air outlet 5 from the air inlet 3 to the carburetor air horn section 4. It extends at an angle. Therefore, the straight parts 6 and 7 of the left and right side walls have a shape that gradually expands symmetrically with respect to the central axis in the direction in which the plurality of air horn parts 4 are lined up, and the container on the side of the air outlet 5 to the air horn part 4 is formed. It is connected on the central axis on the opposite side to the air inlet 3 via curved wall portions 8 and 9 of the left and right side walls that go around the outside of the air inlet 3.
一方、エアコネクタ１の空気室を郭定する上壁
１０は、第２図に示すように、ほぼ水平面内に拡
がつており、空気流入口３からエアホーン部への
空気流出口５方向に延びて空気流出口５の上方を
覆つている。また、エアコネクタ１の空気室２を
郭定する下壁１１は空気流出口５方向に延びてい
る。下壁１１のうち左右側壁の直線部６，７の拡
開部分の間に挾まれている部分は、上壁１０方向
へなだらかに傾斜している。下壁１１のこの傾斜
によつて左右側壁の直線部６，７間のエアホーン
部５方向への通路断面積の増加率を調節すること
ができる。また、下壁１１のうち空気流出口５近
傍は空気流出口５まわりに絞られている。エアコ
ネクタ１がアツパとロアの２つの容器から形成さ
れる場合は、下壁１１のうち空気流出口５まわり
はロア側の容器に形成される。 On the other hand, the upper wall 10 defining the air chamber of the air connector 1 extends in a substantially horizontal plane, as shown in FIG. 2, and extends in the direction of the air outlet 5 from the air inlet 3 to the air horn section. and covers the upper part of the air outlet 5. Further, the lower wall 11 defining the air chamber 2 of the air connector 1 extends in the direction of the air outlet 5. A portion of the lower wall 11 that is sandwiched between the expanded portions of the straight portions 6 and 7 of the left and right side walls is gently inclined toward the upper wall 10. This inclination of the lower wall 11 makes it possible to adjust the rate of increase in the cross-sectional area of the passage between the straight portions 6 and 7 of the left and right side walls in the direction of the air horn portion 5. Further, the portion of the lower wall 11 near the air outlet 5 is narrowed around the air outlet 5. When the air connector 1 is formed from two containers, an upper and a lower container, the area around the air outlet 5 in the lower wall 11 is formed in the container on the lower side.
つぎに、上記構成を有するエアコネクタにおけ
る作用について説明する。 Next, the operation of the air connector having the above configuration will be explained.
エアクリーナで濾過された空気はエアコネクタ
１の空気流入口３に至り、空気流入口３から空気
室２内に流入する。空気流入口３付近において
は、エアクリーナから流入した空気は大きな流速
を有しているが、空気流入口３からエアホーン部
４への空気流出口５に至る間に左右側壁の直線部
６，７に挾まれた水平方向拡がり部分を通るた
め、その流速は大幅に均一化する。したがつて、
エアホーン部４への空気流出口５付近では空気流
れ速度分布は均一化されており、気化器４には各
空気流出口５の全周からほぼ均一量の空気が流入
する。 The air filtered by the air cleaner reaches the air inlet 3 of the air connector 1 and flows into the air chamber 2 from the air inlet 3. In the vicinity of the air inlet 3, the air flowing in from the air cleaner has a high flow velocity, but between the air inlet 3 and the air outlet 5 to the air horn section 4, the air flows into the straight parts 6 and 7 of the left and right side walls. Since the flow passes through the sandwiched horizontally expanding portions, the flow velocity is greatly uniformized. Therefore,
The air flow velocity distribution is uniform near the air outlet 5 to the air horn section 4, and a substantially uniform amount of air flows into the carburetor 4 from the entire circumference of each air outlet 5.
この場合の空気の流速分布を第３図に曲線Ａで
示す。従来のほぼ互いに平行な左右側壁１２，１
３を有する場合には、左右側壁１２，１３間の通
路断面積が流れ方向にほぼ一定であるため、空気
は第３図中Ｂで示すような流速分布を示す。これ
らの流速分布Ａ，Ｂを比較すれば明らかなよう
に、本考案のエアコネクタ１によれば空気流れの
流速分布が水平方向に拡がり、その方向性が減少
することがわかる。そして、互いに平行な左右側
壁１２，１３を有する従来のエアコネクタでは、
空気流入口から流入した空気がエアノーズ部１４
を通りすぎてエアコネクタの対向する側壁に衝突
し、その後エアホーン部に流入する。この場合、
空気の流れはどちらか一方に偏より易い傾向にあ
り、一たん偏よると各気化器間で吸入空気量のア
ンバランスが生じる。しかし、本考案のエアコネ
クタ１では、このような現象は防止される。 The air flow velocity distribution in this case is shown by curve A in FIG. Conventional left and right side walls 12, 1 that are substantially parallel to each other
3, the cross-sectional area of the passage between the left and right side walls 12 and 13 is substantially constant in the flow direction, so that the air exhibits a flow velocity distribution as shown by B in FIG. As is clear from comparing these flow velocity distributions A and B, it can be seen that according to the air connector 1 of the present invention, the flow velocity distribution of the air flow expands in the horizontal direction and its directionality decreases. In a conventional air connector having left and right side walls 12 and 13 parallel to each other,
Air flowing in from the air inlet enters the air nose section 14.
The air passes through the air connector, collides with the opposite side wall of the air connector, and then flows into the air horn section. in this case,
The air flow tends to be biased to one side or the other, and once the air flow is biased, an imbalance occurs in the amount of intake air between the carburetors. However, in the air connector 1 of the present invention, such a phenomenon is prevented.
［考案の効果］
以上説明したように、本考案のエアコネクタに
よれば、エアコネクタの空気流入口から気化器エ
アホーン部への空気流出口に至る間で空気の流速
が水平方向に大幅に拡がつて均一化し、その方向
性もなくなるから、各空気流出口から気化器に吸
い込まれる空気量は気化器間でほぼ均一化される
という効果が得られる。[Effects of the invention] As explained above, according to the air connector of the invention, the air flow velocity can be greatly expanded in the horizontal direction from the air inlet of the air connector to the air outlet to the carburetor air horn. As a result, the amount of air drawn into the vaporizers from each air outlet is made uniform between the vaporizers.
したがつて、吸入空気量の増大と空燃比分配の
維持をはかることができるから、機関の出力を向
上させ得ると共に、エアコネクタにはじやま板等
の付加物を取付ける必要がないから、圧力損失を
伴なわず、かつ構造が簡単で製作が容易であると
いう効果も得られる。 Therefore, since it is possible to increase the amount of intake air and maintain the air-fuel ratio distribution, it is possible to improve the output of the engine, and because there is no need to attach an additional item such as a block plate to the air connector, pressure loss can be reduced. It also has the advantage of being simple in structure and easy to manufacture.
第１図は本考案の一実施例に係るエアコネクタ
の平面図、第２図は第１図のエアコネクタの−
線に沿う断面図、第３図は本考案のエアコネク
タと従来のエアコネクタの空気の流速分布を比較
して示す特性線図である。
１……エアコネクタ、２……空気室、３……空
気流入口、４……気化器エアホーン部、５……空
気流出口、６，７……側壁の直線部、８，９……
側壁の曲壁部、１０……上壁、１１……下壁、Ａ
……本考案のエアコネクタにおける空気の流速分
布、Ｂ……従来のエアコネクタにおける空気の流
速分布。
Fig. 1 is a plan view of an air connector according to an embodiment of the present invention, and Fig. 2 is a plan view of the air connector of Fig. 1.
FIG. 3 is a sectional view taken along the line, and is a characteristic diagram showing a comparison of the air flow velocity distribution of the air connector of the present invention and the conventional air connector. 1... Air connector, 2... Air chamber, 3... Air inlet, 4... Carburetor air horn section, 5... Air outlet, 6, 7... Straight section of side wall, 8, 9...
Curved wall part of side wall, 10... Upper wall, 11... Lower wall, A
... Air flow velocity distribution in the air connector of the present invention, B... Air flow velocity distribution in the conventional air connector.
Claims (1)
下流側に曲壁部を上流側に直線部を有する左右の
側壁と上下壁とによつて郭定された空気室を有
し、空気流入口から流入する吸入空気を空気室、
空気流出口を介して複数の気化器に同時に供給す
るダウンドラフト型多連式気化器に接続される内
燃機関のエアコネクタにおいて、該エアコネクタ
の前記左右側壁の直線部を曲壁部に曲壁部の湾曲
に接するように接続して前記空気室の水平方向の
通路断面をエアコネクタの空気流入口から前記空
気流出口に向つて漸増させるとともに、前記上壁
と下壁との間隔を前記左右の側壁の直線部の間の
部位において前記空気流入口から空気流出口に向
つて漸減させたことを特徴とするエアコネクタ。 having one air inlet and multiple air outlets,
It has an air chamber defined by left and right side walls and upper and lower walls, which have a curved wall section on the downstream side and a straight section on the upstream side, and the intake air flowing in from the air inlet is passed through the air chamber.
In an air connector for an internal combustion engine that is connected to a downdraft type multiple carburetor that simultaneously supplies air to a plurality of carburetors via an air outlet, the straight portions of the left and right side walls of the air connector are curved into curved wall portions. The cross section of the horizontal passage of the air chamber is gradually increased from the air inlet to the air outlet of the air connector, and the distance between the upper wall and the lower wall is adjusted to the left and right sides. An air connector characterized in that the air inlet gradually decreases from the air inlet to the air outlet at a portion between the straight portions of the side wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9793183U JPS606871U (en) | 1983-06-27 | 1983-06-27 | air connector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9793183U JPS606871U (en) | 1983-06-27 | 1983-06-27 | air connector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS606871U JPS606871U (en) | 1985-01-18 |
| JPS6321732Y2 true JPS6321732Y2 (en) | 1988-06-15 |
Family
ID=30232735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9793183U Granted JPS606871U (en) | 1983-06-27 | 1983-06-27 | air connector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS606871U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102000735B1 (en) * | 2018-04-13 | 2019-07-16 | 김혜란 | Sewing machine for hem processing |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS599078Y2 (en) * | 1979-04-11 | 1984-03-22 | トヨタ自動車株式会社 | Air cleaner for twin cab |
-
1983
- 1983-06-27 JP JP9793183U patent/JPS606871U/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102000735B1 (en) * | 2018-04-13 | 2019-07-16 | 김혜란 | Sewing machine for hem processing |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS606871U (en) | 1985-01-18 |
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