JPH0332774Y2 - - Google Patents
Info
- Publication number
- JPH0332774Y2 JPH0332774Y2 JP1983091562U JP9156283U JPH0332774Y2 JP H0332774 Y2 JPH0332774 Y2 JP H0332774Y2 JP 1983091562 U JP1983091562 U JP 1983091562U JP 9156283 U JP9156283 U JP 9156283U JP H0332774 Y2 JPH0332774 Y2 JP H0332774Y2
- Authority
- JP
- Japan
- Prior art keywords
- filter
- canister
- engine
- atmosphere
- activated carbon
- 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
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical class [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 22
- 239000003502 gasoline Substances 0.000 claims description 19
- 238000001704 evaporation Methods 0.000 claims description 10
- 230000008020 evaporation Effects 0.000 claims description 10
- 239000002828 fuel tank Substances 0.000 claims description 7
- 229930195733 hydrocarbon Natural products 0.000 description 10
- 150000002430 hydrocarbons Chemical class 0.000 description 10
- 239000004215 Carbon black (E152) Substances 0.000 description 9
- 239000003610 charcoal Substances 0.000 description 6
- 239000000843 powder Substances 0.000 description 6
- 241000234435 Lilium Species 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 239000000428 dust Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000003749 cleanliness Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
Landscapes
- Supplying Secondary Fuel Or The Like To Fuel, Air Or Fuel-Air Mixtures (AREA)
Description
【考案の詳細な説明】
本考案はエンジンの停止時におけるガソリン蒸
発損失防止のためにエンジンの吸気系と燃料タン
クとの間に介設されるキヤニスタの特にフイルタ
構造の改良に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in the filter structure of a canister interposed between an engine intake system and a fuel tank in order to prevent gasoline evaporation loss when the engine is stopped.
密閉室内に車両を入れ、密閉室の外から気化器
にガソリンを供給してエンジンを運転し、エンジ
ン停止後における所定時間経過後のガソリン蒸発
量、即ち炭化水素（HC）蒸発量を測定すると、
気化器からの蒸発損失が大部分を占めるため、気
化器の燃料吐出側をエンジン停止状態ではシヤツ
トバルブにて閉じる必要がある。 When a vehicle is placed in a sealed room, the engine is operated by supplying gasoline to the carburetor from outside the sealed room, and the amount of gasoline evaporation, that is, the amount of hydrocarbon (HC) evaporation, is measured after a predetermined period of time has passed after the engine has stopped.
Since evaporation loss from the carburetor accounts for most of the loss, it is necessary to close the fuel discharge side of the carburetor with a shut valve when the engine is stopped.
ところが気化器の燃料吐出側を閉じると、燃料
タンク内の蒸発ガソリンの圧が上昇するため、
HCを除去して燃料タンク内を大気に開放しなけ
ればならない。 However, when the fuel discharge side of the carburetor is closed, the pressure of vaporized gasoline in the fuel tank increases,
HC must be removed and the inside of the fuel tank must be opened to the atmosphere.
一方除去したHCをエンジン運転時に吸気系へ
送給することができれば、蒸発ガソリンの有効利
用の面で非常に好都合である。 On the other hand, if the removed HC could be fed to the intake system during engine operation, it would be very convenient in terms of effective use of evaporated gasoline.
そこで燃料タンクと吸気系の例えばベンチユリ
管下流側との間に、活性炭粉を内部に充填したキ
ヤニスタを介設し、エンジン停止状態における蒸
発ガソリンを活性炭粉に吸着せしめ、浄気のみを
大気に開放させることによりガソリン蒸発損失の
防止を図り、又エンジン運転時には活性炭粉に吸
着させたガソリンを吸気系の負圧を利用して該吸
気系へ新気とともに送給させることにより蒸発ガ
ソリンの有効利用を図ることができる。 Therefore, a canister filled with activated carbon powder is interposed between the fuel tank and the downstream side of the intake system, such as a ventilator pipe, so that the evaporated gasoline is adsorbed by the activated carbon powder when the engine is stopped, and only clean air is released to the atmosphere. This prevents gasoline evaporation loss, and when the engine is running, the gasoline adsorbed on activated carbon powder is sent to the intake system along with fresh air using negative pressure in the intake system, thereby making effective use of evaporated gasoline. can be achieved.
ところでキヤニスタの大気開放側には多孔板が
張設され、該多孔板の上記活性炭側表面には密フ
イルタ、粗フイルタを順次重ね合わせることが考
えられるが、多孔板は活性炭粉の充填保持を行う
補助板を兼ねているためにその開孔率には限界が
あり、この多孔板上には密フイルタが密着してい
るため、外気吸入時にダスト等の異物が開孔部に
おける密フイルタに詰まることにより開孔率の低
下を招くこととなる。 By the way, a perforated plate is installed on the atmosphere-opening side of the canister, and a dense filter and a coarse filter may be successively stacked on the activated carbon side surface of the perforated plate, but the perforated plate is used to fill and hold activated carbon powder. Since it also serves as an auxiliary plate, its perforation rate is limited, and since the dense filter is in close contact with this porous plate, foreign matter such as dust may clog the dense filter in the opening when outside air is taken in. This results in a decrease in the porosity.
本考案は以上の問題を解消すべく成されたもの
で、その目的とする処は、多孔板の開孔率の低下
を防止し、HC除去後の大気開放並びに外気吸入
作用を確実に行わしめ、以つてライフアツプを企
図し得る如くしたエンジンのガソリン蒸発損失防
止用のキヤニスタにおけるフイルタ構造を提供す
るにある。 The present invention was developed to solve the above problems, and its purpose is to prevent the decrease in the porosity of the perforated plate and to ensure that the atmosphere is released and the outside air is sucked after HC removal. It is an object of the present invention to provide a filter structure in a canister for preventing gasoline evaporation loss of an engine, which can increase the life of the engine.
斯かる目的を達成すべく本考案は、活性炭粉を
充填して成るキヤニスタの大気開放側に多孔板を
張設し、該多孔板の上記活性炭側表面に密フイル
タ、粗フイルタを順次配設するとともに、当該多
孔板の大気側裏面には空間を形成して密フイル
タ、粗フイルタを順次配設したことを要旨とす
る。 In order to achieve this purpose, the present invention provides a perforated plate on the atmosphere-opening side of a canister filled with activated carbon powder, and sequentially arranges a dense filter and a coarse filter on the activated carbon side surface of the perforated plate. In addition, a space is formed on the back surface of the perforated plate facing the atmosphere, and a dense filter and a coarse filter are sequentially arranged therein.
以下に本考案の好適一実施例を添付図面に基づ
いて詳述する。 A preferred embodiment of the present invention will be described below in detail with reference to the accompanying drawings.
第１図はエンジンのガソリン蒸発損失防止のた
めのシステム図で、第２図はその要部を成すキヤ
ニスタの底部縦断面図である。 FIG. 1 is a diagram of a system for preventing gasoline evaporation loss in an engine, and FIG. 2 is a vertical cross-sectional view of the bottom of a canister, which is an essential part of the system.
不図示の車両の燃料タンクとキヤニスタ１の上
部とは２ウエイバルブ２２を介して管路２１，２
３にて連通し、下流側の管路２３はキヤニスタ１
内に充填した活性炭粉室１０へ多孔板及びフイル
タから成るフイルタ構造２を経て接続され、又キ
ヤニスタ１の上部には管路２４を介して吸気マニ
ホルド３１内から導いた負圧により開くバルブ３
が設けられている。更にバルブ３の下方のチヤン
バ４には管路２５が接続され、この管路２５は上
記吸気マニホルド３１とエアクリーナ３５とを連
結した管路３２の中間部に構成されるベンチユリ
管３３の下流側に接続されている。 The fuel tank of the vehicle (not shown) and the upper part of the canister 1 are connected to pipes 21 and 2 via a two-way valve 22.
3, and the downstream pipe line 23 is connected to the canister 1.
The canister 1 is connected to the activated carbon powder chamber 10 filled therein through a filter structure 2 consisting of a perforated plate and a filter, and a valve 3 which is opened by negative pressure introduced from the inside of the intake manifold 31 through a conduit 24 is installed in the upper part of the canister 1.
is provided. Furthermore, a pipe line 25 is connected to the chamber 4 below the valve 3, and this pipe line 25 is connected to the downstream side of a bench lily pipe 33 that is constructed in the middle of a pipe line 32 that connects the intake manifold 31 and the air cleaner 35. It is connected.
ところで既知の如く吸気マニホルド３１の下流
側は不図示のエンジンの燃焼室に連結され、又ベ
ンチユリ管３３の更に下流側にはスロツトルバル
ブ３４が配されている。 By the way, as is known, the downstream side of the intake manifold 31 is connected to a combustion chamber of an engine (not shown), and a throttle valve 34 is arranged further downstream of the vent lily pipe 33.
そしてキヤニスタ１の下部構造は第２図に示す
如くで、キヤニスタ１の底部は漏斗状の下蓋５に
て閉塞され、この下蓋５の下面中央には斜めに大
気連通管６が設けられている。 The lower structure of the canister 1 is as shown in FIG. 2. The bottom of the canister 1 is closed with a funnel-shaped lower lid 5, and an atmosphere communication pipe 6 is provided diagonally in the center of the lower surface of the lower lid 5. There is.
斯かるキヤニスタ１内の下蓋５上に多孔板であ
るグリツドプレート１２を載置して張設し、この
グリツドプレート１２の上面に先ず密フイルタ１
４を重ね、更に粗フイルタ１５を重ね合わせる。 A grid plate 12, which is a perforated plate, is placed and stretched on the lower lid 5 inside the canister 1, and a dense filter 1 is first placed on the upper surface of the grid plate 12.
4 and then the coarse filter 15.
斯くしてグリツドプレート１２によりその上部
の活性炭室１０に充填した実施例ではチヤコール
粉１１…の保持を行う。 In this embodiment, the activated carbon chamber 10 above the grid plate 12 is filled with the charcoal powder 11.
以上の如く密フイルタ１４、粗フイルタ１５を
順次重ね合わせて上面側に配設したグリツドプレ
ート１２の下面側に第３図に示す通り、空間Ｓを
形成し、該空間Ｓを維持して下蓋５内に上から前
記と略々同一メツシユの密フイルタ１６、粗フイ
ルタ１７の順で重ね合わせて配設する。 As shown in FIG. 3, a space S is formed on the lower surface side of the grid plate 12 which is arranged on the upper surface side by overlapping the fine filter 14 and the coarse filter 15 in sequence as described above, and the space S is maintained and lowered. Inside the lid 5, a dense filter 16 and a coarse filter 17 having substantially the same mesh as described above are placed one on top of the other in that order from above.
以上において、気化器の燃料吐出側は既知の如
くエンジン停止状態ではシヤツトバルブにて閉じ
られるように構成されている。 In the above, the fuel discharge side of the carburetor is configured to be closed by a shut valve when the engine is stopped, as is known.
次に本考案に係るフイルタ構造を備えたキヤニ
スタ１の作用を述べる。 Next, the operation of the canister 1 having the filter structure according to the present invention will be described.
先ずエンジン停止状態にあつては、燃料タンク
内に蒸発したガソリンが管路２１、２ウエイバル
ブ２２及び管路２３を通つてキヤニスタ１内の活
性炭室１０へ流れ、チヤコール粉１１…に蒸発ガ
ソリン成分が吸着され、この時キヤニスタ１の上
部のバルブ３が閉じているため、炭化水素
（HC）をチヤコール粉により除去された浄気の
みが上方の粗フイルタ１５及び密フイルタ１４内
の隙間を通つてグリツドプレート１２の開孔１３
…から空間Ｓ、下方の密フイルタ１６及び粗フイ
ルタ１７を経て外気連通管６から外気に開放され
る。この場合キヤニスタ１内を上方から下方へ流
れる空気流に伴うチヤコール粉１１…の振動等に
より発生する微粒は、上方の粗フイルタ１５及び
密フイルタ１４により２段階にふるわれ、浄気の
みが大気に排出される。 First, when the engine is stopped, the evaporated gasoline in the fuel tank flows through the pipe 21, the two-way valve 22, and the pipe 23 to the activated carbon chamber 10 in the canister 1, and the evaporated gasoline components are added to the charcoal powder 11. At this time, since the valve 3 at the top of the canister 1 is closed, only the clean air from which hydrocarbons (HC) have been removed by the charcoal powder passes through the gap between the upper coarse filter 15 and dense filter 14. Openings 13 in grid plate 12
... is released to the outside air from the outside air communication pipe 6 via the space S, the fine filter 16 and the coarse filter 17 below. In this case, fine particles generated by the vibration of the charcoal powder 11 due to the air flow flowing from the top to the bottom inside the canister 1 are sieved in two stages by the upper coarse filter 15 and dense filter 14, and only the clean air is released into the atmosphere. be discharged.
そしてエンジン運転時には、吸気系が作動する
ため、キヤニスタ１の上部のバルブ３が管路２４
を介しての吸気マニホルド３１内の負圧吸引作用
により開き、これによりキヤニスタ１内にはチヤ
ンバ４、管路２５を介してのベンチユリ管３３下
流側の負圧による吸引力が作用するため、外気が
大気連通管６を経、下方の粗フイルタ１７及び密
フイルタ１６を通つてグリツドプレート１２の下
面側の空間Ｓに吸入される。この場合大気中のダ
スト等の異物は先ず粗フイルタ１７で、次に密フ
イルタ１６で２段階にふるわれるため、浄気のみ
が両フイルタ１７，１６内の隙間を通つて空間Ｓ
に吸入され、従来の如く異物がグリツドプレート
１２の開孔１３…に入り込むことなく、従つて上
方の密フイルタ１４に異物が詰まることがなく、
空間Ｓに浄気のみを引き込むことができる。 When the engine is running, the intake system operates, so the valve 3 at the top of the canister 1 is connected to the pipe 24.
It opens due to the suction action of negative pressure in the intake manifold 31 through the canister 1, and as a result, a suction force due to the negative pressure downstream of the vent lily pipe 33 through the chamber 4 and the pipe line 25 acts on the inside of the canister 1. is sucked into the space S on the lower surface side of the grid plate 12 through the atmosphere communication pipe 6 and through the lower coarse filter 17 and fine filter 16. In this case, foreign matter such as dust in the atmosphere is first sieved in two stages by the coarse filter 17 and then by the dense filter 16, so that only clean air passes through the gap between the two filters 17 and 16 into the space S.
The foreign matter will not enter the openings 13 of the grid plate 12 as in the conventional case, and the upper dense filter 14 will not be clogged with foreign matter.
Only clean air can be drawn into the space S.
而して下方の粗フイルタ１７及び密フイルタ１
６と空間Ｓの存在によりグリツドプレート１２の
開孔１３…は当初設定した開孔率を維持している
ため、充分なる量の浄化された外気が開孔１３…
から上方の密フイルタ１４及び粗フイルタ１５を
通つて活性炭室１０へ流れ、チヤコール粉１１…
に吸着されたガソリン成分HCを再び斯かる空気
流により分離し、新気とともに（HC）がチヤン
バ４及び管路２５を通つてベンチユリ管３３下流
側に送給される。 Therefore, the lower coarse filter 17 and fine filter 1
6 and the space S, the openings 13... of the grid plate 12 maintain the initially set porosity ratio, so that a sufficient amount of purified outside air flows through the openings 13...
Flows from the upper dense filter 14 and coarse filter 15 to the activated carbon chamber 10, and the charcoal powder 11...
The gasoline component HC adsorbed by the gasoline component HC is again separated by the air flow, and the HC is sent together with fresh air to the downstream side of the vent lily pipe 33 through the chamber 4 and the pipe line 25.
又グリツドプレート１２の上下に略々同一の二
層型フイルタ１４，１５及び１６，１７を配した
ため、相互のフイルタの作用により浄気の清浄度
が一層アツプするとともに、チヤコール粉１１…
のふるいを上方のフイルタ１４及び１５で、大気
中の異物のふるいを下方のフイルタ１６及び１７
で確実に分担することができるため、フイルタ構
造のライフアツプを達成することができる。 In addition, since substantially identical two-layer filters 14, 15 and 16, 17 are arranged above and below the grid plate 12, the cleanliness of the purified air is further increased by the mutual action of the filters, and the charcoal powder 11...
The upper filters 14 and 15 are used to screen foreign substances in the atmosphere, and the lower filters 16 and 17 are used to screen foreign substances in the atmosphere.
The life of the filter structure can be increased because the load can be reliably shared.
以上の説明で明らかな如く本考案のフイルタ構
造によれば、多孔板の上方に密フイルタ、粗フイ
ルタを順次配設するとともに、該多孔板の下方に
は空間を形成して密フイルタ、粗フイルタを順次
配設して成るサンドイツチ構造としたため、浄気
の大気開放は勿論のこと、特に通過量の多い外気
吸入時には上記空間の維持により多孔板の開孔率
を充分確保して外気吸入を行うことができ、更に
上下の二層型フイルタによりキヤニスタ内外のフ
イルタ作用を分担できることによつて全体として
の大幅なるライフアツプを達成することができ、
しかも以上をスペースを大きく採ることがないサ
ンドイツチ構造で実現できるためスペース上の面
でも有利である等多大の利点を有する。 As is clear from the above explanation, according to the filter structure of the present invention, a dense filter and a coarse filter are sequentially disposed above the perforated plate, and a space is formed below the perforated plate to accommodate the dense filter and the coarse filter. Because of the sandwich structure, which is made up of sequentially arranged vents, not only can clean air be released to the atmosphere, but also, especially when inhaling outside air with a large amount of passage, by maintaining the above-mentioned space, the perforation ratio of the perforated plate can be sufficiently ensured to inhale outside air. Furthermore, by sharing the filtering function inside and outside the canister with the upper and lower two-layer filter, it is possible to achieve a significant increase in the overall life of the canister.
Moreover, since the above can be realized with a sandwich structure that does not take up a large amount of space, it has many advantages such as being advantageous in terms of space.
図面は本考案の一実施例を示すもので、第１図
はエンジンのガソリン蒸発損失防止のためのシス
テム図、第２図はその要部を成すキヤニスタの底
部縦断面図、第３図は本考案に係るフイルタ構造
の拡大縦断面図である。
尚図面中１はキヤニスタ、３はバルブ、６は外
気連通管、１０は活性炭室、１１は活性炭、１２
は多孔板、１４は上方の密フイルタ、１５は同粗
フイルタ、１６は下方の密フイルタ、１７は同粗
フイルタ、Ｓは空間である。
The drawings show one embodiment of the present invention; Fig. 1 is a diagram of a system for preventing gasoline evaporation loss in an engine, Fig. 2 is a vertical sectional view of the bottom of the canister, which is the main part, and Fig. 3 is a diagram of the system for preventing gasoline evaporation loss in the engine. FIG. 3 is an enlarged vertical cross-sectional view of the filter structure according to the invention. In the drawing, 1 is a canister, 3 is a valve, 6 is an outside air communication pipe, 10 is an activated carbon chamber, 11 is activated carbon, 12
14 is a perforated plate, 14 is an upper fine filter, 15 is a coarse filter, 16 is a lower fine filter, 17 is a coarse filter, and S is a space.
Claims (1)
れ、内部に充填した活性炭粉に蒸発ガソリンを吸
着せしめ、浄気のみを大気に開放するようにした
キヤニスタにおいて、該キヤニスタの大気開放側
に多孔板を張設し、該多孔板の上記活性炭粉側表
面に密フイルタ、粗フイルタを順次配設するとと
もに、当該多孔板の大気側裏面には空間を形成し
て密フイルタ、粗フイルタを順次配設したことを
特徴とするエンジンのガソリン蒸発損失防止用の
キヤニスタにおけるフイルタ構造。 A canister is installed between an engine's intake system and a fuel tank, and the activated carbon powder filled inside the canister adsorbs evaporated gasoline, allowing only clean air to be released to the atmosphere. A plate is stretched, and a dense filter and a coarse filter are sequentially arranged on the surface of the activated carbon powder side of the perforated plate, and a space is formed on the back surface of the perforated plate facing the atmosphere, and a dense filter and a coarse filter are sequentially arranged. A filter structure in a canister for preventing gasoline evaporation loss in an engine, characterized by the following:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9156283U JPS59196570U (en) | 1983-06-15 | 1983-06-15 | Filter structure in canister to prevent engine gasoline evaporation loss |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9156283U JPS59196570U (en) | 1983-06-15 | 1983-06-15 | Filter structure in canister to prevent engine gasoline evaporation loss |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59196570U JPS59196570U (en) | 1984-12-27 |
| JPH0332774Y2 true JPH0332774Y2 (en) | 1991-07-11 |
Family
ID=30221570
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9156283U Granted JPS59196570U (en) | 1983-06-15 | 1983-06-15 | Filter structure in canister to prevent engine gasoline evaporation loss |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59196570U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100956030B1 (en) | 2008-03-03 | 2010-05-06 | 코리아에프티 주식회사 | Canister monolithic attached air filter |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49125728A (en) * | 1973-04-09 | 1974-12-02 | ||
| JPS5823617B2 (en) * | 1976-02-12 | 1983-05-16 | 大日本印刷株式会社 | Photosensitive resin composition |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5823617U (en) * | 1981-08-07 | 1983-02-15 | 富士重工業株式会社 | Canista |
| JPS58151423U (en) * | 1982-04-05 | 1983-10-11 | トヨタ自動車株式会社 | Activated carbon container for adsorbing fuel evaporative gas |
-
1983
- 1983-06-15 JP JP9156283U patent/JPS59196570U/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49125728A (en) * | 1973-04-09 | 1974-12-02 | ||
| JPS5823617B2 (en) * | 1976-02-12 | 1983-05-16 | 大日本印刷株式会社 | Photosensitive resin composition |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59196570U (en) | 1984-12-27 |
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