JPS587080Y2 - Fuel vapor processing equipment for internal combustion engines - Google Patents
Fuel vapor processing equipment for internal combustion enginesInfo
- Publication number
- JPS587080Y2 JPS587080Y2 JP1976014950U JP1495076U JPS587080Y2 JP S587080 Y2 JPS587080 Y2 JP S587080Y2 JP 1976014950 U JP1976014950 U JP 1976014950U JP 1495076 U JP1495076 U JP 1495076U JP S587080 Y2 JPS587080 Y2 JP S587080Y2
- Authority
- JP
- Japan
- Prior art keywords
- fuel vapor
- pipe
- tank
- internal combustion
- engine
- 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
Landscapes
- Supplying Secondary Fuel Or The Like To Fuel, Air Or Fuel-Air Mixtures (AREA)
Description
【考案の詳細な説明】
本考案は、自動車などの内燃機関において、気化器のフ
ロートチャンバ内に発生する燃料蒸気の処理装置に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for processing fuel vapor generated in a float chamber of a carburetor in an internal combustion engine such as an automobile.
排気ガス浄化対策を施したエンジンでは、排気ガスを高
温に保つ関係でエンジン室内温度が高くなる傾向にある
。In engines with exhaust gas purification measures, the temperature inside the engine tends to rise as the exhaust gas is kept at a high temperature.
このため、エンジン停止後も気化器付近は高温のままと
なり、フロートチャンバ内に発生した蒸気がこのインナ
ベントパイプを通って吸気系に侵入するので、エンジン
起動時に混合気が過濃となり、再起動の悪化および排気
系からの生ガスの排出などの不都合が生ずる。For this reason, even after the engine has stopped, the area around the carburetor remains high temperature, and the steam generated in the float chamber enters the intake system through this inner vent pipe, so when the engine is started, the air-fuel mixture becomes too rich and the engine is restarted. This results in inconveniences such as deterioration of the gas and discharge of raw gas from the exhaust system.
このような不都合を解消するための燃料蒸気処理装置と
して、例えば特公昭４７−４３０９１号公報に記載され
たもののように、気化器のフロートチャンバから生ずる
燃料蒸気を燃料蒸気タンクに一旦入れて溜め、タンク内
に入った燃料蒸気をエンジンの運転により吸気系に流入
させて処理するものが知られてる。As a fuel vapor processing device for solving such inconveniences, for example, as described in Japanese Patent Publication No. 47-43091, fuel vapor generated from a float chamber of a vaporizer is temporarily put into a fuel vapor tank and stored. It is known that the fuel vapor that has entered the tank is processed by flowing it into the intake system by operating the engine.
しかし、前記公報に記載されたものは、タンク内に溜め
た燃料蒸気を吸気系へ流入させる手段の組立がしにくく
、またタンク内に溜めた燃料蒸気の吸気系への排出に問
題があった。However, in the method described in the above publication, it was difficult to assemble the means for allowing the fuel vapor accumulated in the tank to flow into the intake system, and there were also problems in discharging the fuel vapor accumulated in the tank to the intake system. .
本考案は、前述した問題を解決して、燃料蒸気タンク内
に溜めた燃料蒸気を吸気系へ流入させる手段の改良によ
り、この手段が組立て易く、また前記タンクから吸気系
への燃料蒸気の流入が良好に行える、内燃機関の燃料蒸
気処理装置を提供することを目的としている。The present invention solves the above-mentioned problems and improves the means for allowing fuel vapor stored in a fuel vapor tank to flow into the intake system, so that this means is easy to assemble, and the fuel vapor flows from the tank to the intake system. It is an object of the present invention to provide a fuel vapor processing device for an internal combustion engine that can satisfactorily perform the following steps.
この目的を達成するために、本考案による燃料蒸気処理
装置は、気化器のフロートチャンバの下方に位置させて
燃料蒸気タンクを設け、この燃料蒸気タンクの下部とフ
ロートチャンバの上部とを管により連通させると共に、
燃料蒸気タンク内とエアクリーナのフィルタ上流側の吸
込み管とを、吸込み管上流側に向って開口する空気導入
管、および吸込み管下流側に向って開口する燃料蒸気排
出管の２本の管によって連通させたものである。In order to achieve this objective, the fuel vapor processing apparatus according to the present invention includes a fuel vapor tank located below the float chamber of the vaporizer, and the lower part of the fuel vapor tank and the upper part of the float chamber are connected by a pipe. Along with letting
The inside of the fuel vapor tank and the suction pipe upstream of the air cleaner filter are communicated through two pipes: an air introduction pipe that opens toward the upstream side of the suction pipe, and a fuel vapor exhaust pipe that opens toward the downstream side of the suction pipe. This is what I did.
以下、本考案の一実施例につき図面を参照して説明する
。Hereinafter, one embodiment of the present invention will be described with reference to the drawings.
図において、符号１はエンジン、２は気化器であり、気
化器２のフロートチャンバ３の上部が管４によってフロ
ートチャンバ３の下方に配設された燃料蒸気タンク５の
下部に連通されている。In the figure, numeral 1 is an engine, 2 is a carburetor, and the upper part of a float chamber 3 of the carburetor 2 is communicated with the lower part of a fuel vapor tank 5 disposed below the float chamber 3 through a pipe 4.
この燃料蒸気タンク５には空気導入管６と燃料蒸気排出
管７の２本の管の基端が連通されている。The base ends of two pipes, an air introduction pipe 6 and a fuel vapor discharge pipe 7, are communicated with the fuel vapor tank 5.
空気導入管６にはフィルタ８および絞り９が設けられ、
空気導入管６の先端１２がエアクリーナ１０のフィルタ
上流側の吸込み管１１内に上流側に向って開口されてい
る。The air introduction pipe 6 is provided with a filter 8 and a throttle 9.
A tip 12 of the air introduction pipe 6 is opened toward the upstream side into a suction pipe 11 on the upstream side of the filter of the air cleaner 10.
燃料蒸気排出管７は、前記吸込み管１１内に空気導入管
６より下流に位置して挿入され、燃料蒸気排出管７の先
端１３が下流側に向って開口されている。The fuel vapor exhaust pipe 7 is inserted into the suction pipe 11 at a position downstream from the air introduction pipe 6, and the distal end 13 of the fuel vapor exhaust pipe 7 is opened toward the downstream side.
前述のように構成された実施例の燃料蒸気処理装置は、
エンジン停止後にフロートチャンバ３内で発生した燃料
蒸気が空気より重いので管４を通って燃料蒸気タンク５
内に溜まる。The fuel vapor processing device of the embodiment configured as described above has the following features:
Since the fuel vapor generated in the float chamber 3 after the engine stops is heavier than air, it passes through the pipe 4 to the fuel vapor tank 5.
Accumulates inside.
そして、エンジンを起動すると、吸入空気による空気導
入管６からのラム圧と、燃料蒸気排出管７からの吸引作
用とにより、燃料蒸気タンク５内に活性炭などの燃料蒸
気吸着材が収容されていないことと相俟って、燃料蒸気
タンク５内に溜まった燃料蒸気が、空気導入管６から燃
料蒸気タンク５内に入った空気に伴われてその排出管７
から容易に吸気系に導かれ、エンジンで燃焼される。When the engine is started, the ram pressure from the air intake pipe 6 due to intake air and the suction action from the fuel vapor exhaust pipe 7 cause the fuel vapor adsorbent such as activated carbon to be removed from the fuel vapor tank 5. At the same time, the fuel vapor accumulated in the fuel vapor tank 5 is accompanied by the air that entered the fuel vapor tank 5 from the air introduction pipe 6, and is discharged from the exhaust pipe 7.
It is easily led to the intake system and burned in the engine.
そして、エンジンの回転数が低く、吸気系に吸入される
空気の流速が小さい運転時には燃料蒸気タンク５から吸
気系に吸入される燃料蒸気は少なく、エンジンの回転数
が増大するにつれて燃料蒸気が吸気系に多く吸入される
。When the engine speed is low and the flow rate of air sucked into the intake system is low, little fuel vapor is drawn into the intake system from the fuel vapor tank 5, and as the engine speed increases, fuel vapor flows into the intake system. It is inhaled in large quantities into the system.
したがって、燃料蒸気タンク５から吸気系に吸入される
燃料蒸気の量は、エンジンの回転数と関連して自動的に
適切に調節される。Therefore, the amount of fuel vapor drawn into the intake system from the fuel vapor tank 5 is automatically and appropriately adjusted in relation to the engine speed.
なお、空気導入管６に取付けられた絞り９は、エンジン
の起動時における燃料蒸気の吸入をさらに抑制し、エン
ジンの起動不良を防止する。Note that the throttle 9 attached to the air introduction pipe 6 further suppresses intake of fuel vapor during engine startup, thereby preventing engine startup failure.
以上説明したように、本考案によれば、気化器のフロー
トチャンバから導かれて燃料蒸気タンク内に溜められた
燃料蒸気を、エンジン運転時に吸気系に流入されるため
に、燃料蒸気タンク内とエアクリーナのフィルタ上流側
の吸込み管とを、上流側に向って開口する空気導入管お
よび下流側に向って開口する燃料蒸気排出管の２本で連
通させたので、燃料蒸気排出管を気化器の一部と連通さ
せるものに比べて、スペースの関係や位置決めの点で、
空気導入管および燃料蒸気排出管の組立時の配管が容易
となり、また前述したように、エンジンの運転中には常
に空気導入管からラム圧だけではなく燃料蒸気排出管か
らの吸引作用によって、燃料蒸気タンクから吸気系に燃
料蒸気を流入させているので、燃料蒸気タンク内に燃料
吸着材を収容していないことと相俟って、燃料蒸気タン
クから燃料蒸気を吸気系に容易に導くことができ、さら
にエンジンの運転状況に応じて吸気系への燃料蒸気の流
入量を容易かつ適正に制御できるという効果が得られる
。As explained above, according to the present invention, the fuel vapor led from the float chamber of the carburetor and stored in the fuel vapor tank is injected into the intake system during engine operation. The suction pipe on the upstream side of the filter of the air cleaner is communicated with the air intake pipe opening toward the upstream side and the fuel vapor exhaust pipe opening toward the downstream side, so the fuel vapor exhaust pipe is connected to the carburetor. In terms of space and positioning, compared to those that communicate with one part,
This simplifies piping when assembling the air inlet pipe and the fuel vapor exhaust pipe, and as mentioned above, during engine operation, fuel is constantly pumped not only by ram pressure from the air inlet pipe but also by the suction action from the fuel vapor exhaust pipe. Since fuel vapor flows into the intake system from the steam tank, combined with the fact that no fuel adsorbent is housed in the fuel vapor tank, fuel vapor can be easily guided from the fuel vapor tank to the intake system. Furthermore, it is possible to easily and appropriately control the amount of fuel vapor flowing into the intake system according to the operating conditions of the engine.
図は本考案の一実施例による内燃機関の燃料蒸気処理装
置の断面図である。
１・・・・・・エンジン、２・・・・・・気化器、３・
・・・・・フロートチャンバ、４・・・・・・管、５・
・・・・・燃料蒸気タンク、６・・・・・・空気導入管
、７・・・・・・燃料蒸気排出管、８・・・・・・フィ
ルタ、９・・・・・・絞り、１０・・・・・・エアクリ
ーナ、１１・・・・・・吸込み管。The figure is a sectional view of a fuel vapor processing device for an internal combustion engine according to an embodiment of the present invention. 1...engine, 2...carburizer, 3.
...Float chamber, 4...Pipe, 5.
... Fuel vapor tank, 6 ... Air introduction pipe, 7 ... Fuel vapor discharge pipe, 8 ... Filter, 9 ... Throttle, 10... Air cleaner, 11... Suction pipe.
Claims (2)
て燃料蒸気タンクを設け、この燃料蒸気タンクの下部と
フロートチャンバの上部とを管により連通させると共に
、燃料蒸気タンク内とエアクリーナのフィルタ上流側の
吸込み管を、吸込み管上流側に向って開口する空気導入
管、および吸込み管下流側に向って開口する燃料蒸気排
出管の２本の管によって連通させたことを特徴とする内
燃機関の燃料蒸気処理装置。(1) A fuel vapor tank is provided below the float chamber of the carburetor, and the lower part of the fuel vapor tank and the upper part of the float chamber are communicated by a pipe, and the inside of the fuel vapor tank and the upstream side of the filter of the air cleaner are connected. Fuel vapor for an internal combustion engine, characterized in that the suction pipe is communicated with two pipes: an air introduction pipe that opens toward the upstream side of the suction pipe, and a fuel vapor discharge pipe that opens toward the downstream side of the suction pipe. Processing equipment.
の範囲第（１）項記載の内燃機関の燃料蒸気処理装置。(2) The fuel vapor processing device for an internal combustion engine according to claim (1), wherein the air introduction pipe has a throttle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1976014950U JPS587080Y2 (en) | 1976-02-10 | 1976-02-10 | Fuel vapor processing equipment for internal combustion engines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1976014950U JPS587080Y2 (en) | 1976-02-10 | 1976-02-10 | Fuel vapor processing equipment for internal combustion engines |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS52106725U JPS52106725U (en) | 1977-08-13 |
| JPS587080Y2 true JPS587080Y2 (en) | 1983-02-07 |
Family
ID=28475191
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1976014950U Expired JPS587080Y2 (en) | 1976-02-10 | 1976-02-10 | Fuel vapor processing equipment for internal combustion engines |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS587080Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5581843B2 (en) * | 2010-06-22 | 2014-09-03 | スズキ株式会社 | Motorcycle canister arrangement structure |
-
1976
- 1976-02-10 JP JP1976014950U patent/JPS587080Y2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS52106725U (en) | 1977-08-13 |
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