JPS6115245Y2 - - Google Patents
Info
- Publication number
- JPS6115245Y2 JPS6115245Y2 JP1058081U JP1058081U JPS6115245Y2 JP S6115245 Y2 JPS6115245 Y2 JP S6115245Y2 JP 1058081 U JP1058081 U JP 1058081U JP 1058081 U JP1058081 U JP 1058081U JP S6115245 Y2 JPS6115245 Y2 JP S6115245Y2
- Authority
- JP
- Japan
- Prior art keywords
- canister
- evaporated fuel
- adsorbent
- fuel
- passage
- 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
- 239000000446 fuel Substances 0.000 claims description 78
- 239000003463 adsorbent Substances 0.000 claims description 44
- 239000012530 fluid Substances 0.000 claims 1
- 238000010926 purge Methods 0.000 claims 1
- 230000002000 scavenging effect Effects 0.000 description 15
- 230000004048 modification Effects 0.000 description 8
- 238000012986 modification Methods 0.000 description 8
- 239000002828 fuel tank Substances 0.000 description 7
- 238000002955 isolation Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000004888 barrier function Effects 0.000 description 5
- 238000000605 extraction Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 230000001105 regulatory effect Effects 0.000 description 4
- 238000011144 upstream manufacturing Methods 0.000 description 4
- 239000006200 vaporizer Substances 0.000 description 4
- 238000009423 ventilation Methods 0.000 description 4
- 238000003795 desorption Methods 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
Landscapes
- Separation Of Gases By Adsorption (AREA)
Description
【考案の詳細な説明】
この考案は内燃機関における蒸発燃料取制御装
置用キヤニスタに関するものである。[Detailed Description of the Invention] This invention relates to a canister for an evaporative fuel intake control device in an internal combustion engine.
燃料タンク、気化器浮子室等の燃料溜から発生
する蒸発燃料を大気中に排出することなく、蒸発
燃料制御装置用キヤニスタで回収し、キヤニスタ
で回収した蒸発燃料を機関の作動と共に導出して
燃焼させるようにした蒸発燃料制御装置は周知で
ある。近時蒸発燃料の排出規制の強化に伴ない蒸
発燃料制御装置系統からの蒸発燃料排出量が従来
よりも厳しく制御されるようになつてきた。 Evaporated fuel generated from fuel reservoirs such as fuel tanks and vaporizer float chambers is collected in the canister for the evaporative fuel control device without being discharged into the atmosphere, and the evaporated fuel collected in the canister is led out and combusted as the engine operates. Evaporated fuel control devices designed to control the fuel vapor are well known. BACKGROUND ART With the recent tightening of evaporative fuel emission regulations, the amount of evaporative fuel discharged from evaporative fuel control system systems has come to be controlled more strictly than before.
前記要求を満足させる方法として活性炭等の吸
着剤充填量を増加させたキヤニスタを使用し、多
量の蒸発燃料を捕集させて蒸発燃料の大気排出を
防止する方法が考えられるが、この方法はキヤニ
スタが大型化し、コストアツプ、車輌塔載性低下
等の問題がある。また、別の方法としてキヤニス
タの掃気空気量を増加させて掃気効率を向上さ
せ、少ない吸着剤充填量のキヤニスタで多量の蒸
発燃料を捕集させて蒸発燃料の大気排出を防止す
る方法も考えられるが、この方法はキヤニスタの
掃気空気量を増加させることにより、少ない吸着
剤充填量で多量の蒸発燃料を制御することが可能
となるものの、機関のフイーリング低下及び混合
気濃度への影響が大きいため、排出ガス中の未然
焼成分の残量の増加等の弊害がみられる。 One possible method to satisfy the above requirements is to use a canister filled with an increased amount of adsorbent such as activated carbon to collect a large amount of evaporated fuel and prevent the evaporated fuel from being discharged into the atmosphere. However, this increases the size of the vehicle, leading to problems such as increased costs and decreased mountability on vehicles. Another method is to increase the amount of scavenging air in the canister to improve scavenging efficiency, and to collect a large amount of evaporated fuel with a canister filled with a small amount of adsorbent, thereby preventing the evaporated fuel from being discharged into the atmosphere. However, although this method makes it possible to control a large amount of evaporated fuel with a small amount of adsorbent by increasing the amount of scavenging air in the canister, it has a large effect on the engine feeling and mixture concentration. , adverse effects such as an increase in the amount of unburnt components remaining in the exhaust gas are observed.
本考案はキヤニスタの吸着剤層内にじやま板を
設けることにより吸着剤の吸着効率、脱離効率を
著しく向上させることにより、キヤニスタ形状を
コンパクトにすることが可能となつたり安定した
機関運転を維持し、未燃焼ガスの大気排出抑止や
蒸発燃料の大気排出抑止を可能にさせるものであ
る。 This invention significantly improves the adsorption efficiency and desorption efficiency of the adsorbent by providing a diagonal plate within the adsorbent layer of the canister, making it possible to make the canister shape more compact and ensuring stable engine operation. This makes it possible to prevent unburned gas and evaporated fuel from being emitted into the atmosphere.
次に図面の実施例に基づいてこの考案を説明す
る。 Next, this invention will be explained based on the embodiments shown in the drawings.
第１図において、燃料タンク１とキヤニスタ４
とは蒸発燃料通路２で連通しておりその途中に圧
力調整弁３がある。気化器浮子室７とキヤニスタ
４とは蒸発燃料通路８で連通しており、その通路
中に通路開閉弁９がある。絞り弁１３の開度増大
に伴ない絞り弁１３の上流側より下流側へ変化す
る位置に蒸発燃料抽出孔１０を設け、それは通路
制御弁１２を介してキヤニスタ４に混合気通路１
１で連通している。通路２，８，１１はキヤニス
タ４に対して、その吸着剤５の同一側に開口して
おり、その反対側の吸着剤５部には空気導入口６
が設けられている。 In Figure 1, fuel tank 1 and canister 4
It communicates with the fuel vapor passage 2 through an evaporated fuel passage 2, and there is a pressure regulating valve 3 in the middle. The vaporizer float chamber 7 and the canister 4 communicate with each other through an evaporated fuel passage 8, and a passage opening/closing valve 9 is provided in the passage. An evaporated fuel extraction hole 10 is provided at a position that changes from the upstream side to the downstream side of the throttle valve 13 as the opening degree of the throttle valve 13 increases, and it is connected to the canister 4 via the passage control valve 12.
1 is connected. The passages 2, 8, and 11 are open to the canister 4 on the same side of the adsorbent 5, and an air inlet 6 is opened to the adsorbent 5 on the opposite side.
is provided.
次に本考案の要部を成す蒸発燃料制御装置用キ
ヤニスタ４の構造について第２図の実施例で説明
する。キヤニスタケース１６には蒸発燃料通路２
に連通される入口管１７、蒸発燃料通路８に連通
される入口管１８、混合気通路１１に連通される
出口管１９が設けられており、それらは吸着剤４
の同一側に開口している。入口管１７に連通して
いる蒸気室２０は隔離筒２２により吸着剤５内に
開口している。入口管１８と出口管１９とは蒸気
室２１を介して連通している。蒸気室２０と蒸気
室２１とは隔離筒２２で分離されており吸着剤５
層を介して連通している。じやま板２５は保持部
２７により隔離筒２２に保持されており、蒸気室
２０と蒸気室２１とはじやま板２５に設けた通路
３０により吸着剤５を介して連通している。蒸気
室２０と空気導入口６とはじやま板２５の通路３
０や通気孔２６により吸着剤５を介して連通して
いる。吸着剤５はろ過材２４ａ，２４ｂ，２４
ｃ、押え板２３ａ，２３ｂ，２３ｃによりはさま
れており、弾性体２８が押え板２３ｃを押すこと
によりキヤニスタケース１６内に保持されてい
る。キヤニスタカバー２９とキヤニスケース１６
とは締結されている。じやま板２５は蒸気室２
０、蒸気室２１と対向して設けられている。尚３
０ａはじやま板２５の外端部とキヤニスタケース
内壁面との間隙で蒸発燃料及び掃気空気の通路を
形成している。 Next, the structure of the canister 4 for the evaporative fuel control device, which constitutes the essential part of the present invention, will be explained with reference to the embodiment shown in FIG. The canister case 16 has an evaporated fuel passage 2.
An inlet pipe 17 that communicates with the adsorbent 4 , an inlet pipe 18 that communicates with the vaporized fuel passage 8 , and an outlet pipe 19 that communicates with the mixture passage 11 are provided.
It opens on the same side of the A steam chamber 20 communicating with the inlet pipe 17 opens into the adsorbent 5 by means of a separating tube 22 . The inlet pipe 18 and the outlet pipe 19 communicate with each other via a steam chamber 21. The steam chamber 20 and the steam chamber 21 are separated by an isolation cylinder 22, and the adsorbent 5
They communicate through layers. The barrier plate 25 is held in the isolation cylinder 22 by a holding part 27, and the steam chamber 20 and the steam chamber 21 are communicated via the adsorbent 5 through a passage 30 provided in the barrier plate 25. Passage 3 between the steam chamber 20, the air inlet 6 and the cutting board 25
0 and vent holes 26 through the adsorbent 5. The adsorbent 5 includes filter media 24a, 24b, 24
c, it is sandwiched between presser plates 23a, 23b, and 23c, and is held within the canister case 16 by the elastic body 28 pressing the presser plate 23c. Canister cover 29 and canister case 16
It has been concluded. Jiyama board 25 is steam room 2
0, it is provided facing the steam chamber 21. Nao 3
0a is a gap between the outer end of the cutting plate 25 and the inner wall surface of the canister case to form a passage for evaporated fuel and scavenging air.
第３図は隔離筒２２にじやま板２５の保持部２
７が保持されている状態を示しており、じやま板
２５には通気孔２６が設けられている。 Figure 3 shows the holding part 2 of the isolation cylinder 22 and the rainbow board 25.
7 is shown in a state where it is being held, and a ventilation hole 26 is provided in the wall board 25.
次に第２図の変形例である第４図について変形
部分のみ説明する。 Next, only the modified portions of FIG. 4, which is a modified example of FIG. 2, will be explained.
第２図では平板状のじやま板２５が保持部２７
により吸着剤５層内で隔離筒２２に保持されてい
るのに比較して、第４図では逆円錐状のじやま板
２５ａが外周部に設けた保持部２７ａにより吸着
剤５層内でキヤニスタケース１６内壁に保持され
ている点が異なる。じやま板２５ａには通気孔２
６ａと通路３０ａが設けられており、蒸気室２
０、蒸気室２１が空気導入口６と吸着剤５層内で
通気孔２６ａ、通路３０ａを介して連通する。 In FIG.
In contrast, in Fig. 4, the inverted cone-shaped jamb plate 25a holds the adsorbent in the five layers by the holding part 27a provided on its outer periphery. The difference is that it is held on the inner wall of the nister case 16. Ventilation holes 2 are provided in the mountain board 25a.
6a and a passage 30a are provided, and the steam chamber 2
0, the steam chamber 21 communicates with the air inlet 6 through the vent hole 26a and passage 30a within the five layers of adsorbent.
第５図ではキヤニスタケース１６にじやま板２
５ａの保持部２７ａが保持されている状態を示し
ている。 In Fig. 5, the canister case 16 and the rainbow board 2 are shown.
5a is shown in a state where the holding portion 27a is held.
第２図の変形例である第６図について変形部分
のみ説明する。 Regarding FIG. 6, which is a modification of FIG. 2, only the modified portion will be explained.
第２図では平板状のじやま板２５が保持部２７
により吸着剤５層内で隔離筒２２に保持されてい
るのに比較して、第６図では皿状のじやま板２５
ｂが保持部により吸着剤５層内で隔離筒２２ｂに
保持されている点が異なる。 In FIG.
In contrast, in FIG.
The difference is that b is held in the isolation cylinder 22b within the five layers of adsorbent by a holding part.
第２図の変形例である第７図について変形部分
のみ説明する。 Regarding FIG. 7, which is a modification of FIG. 2, only the modified portion will be explained.
第２図では１つの平板状のじやま板２５が保持
部２７により吸着剤５層内で隔離筒２２に保持さ
れているのに比較して、第７図では逆円錐状のじ
やま板２５ｃが保持部２７ｃにより吸着剤５層内
で隔離筒２２に保持されているのともう１つの逆
円錐状のじやま板２５ａが保持部２７ａにより吸
着剤５層内でキヤニスタケース１６内壁に保持さ
れている点が異なる。各々のじやま板２５ａ，２
５ｃは蒸気室２０、蒸気室２１側と空気導入口６
側との間に設けた吸着剤５層内に設けられてお
り、蒸気室２０、蒸気室２１と対向した形で設け
られている。 In Fig. 2, one flat plate-shaped sill plate 25 is held in the isolation tube 22 by a holding part 27 within five layers of adsorbent, whereas in Fig. 7, an inverted conical sill plate 25c is shown. is held in the isolation cylinder 22 within five layers of adsorbent by the holding part 27c, and another inverted conical wall plate 25a is held on the inner wall of the canister case 16 within five layers of adsorbent by the holding part 27a. The difference is that it is Each mountain board 25a, 2
5c is the steam chamber 20, steam chamber 21 side and air inlet 6
It is provided in five layers of adsorbent provided between the sides, and is provided in a form facing the steam chamber 20 and the steam chamber 21.
第２図の変形例である第８図について変形部分
のみ説明する。 Regarding FIG. 8, which is a modification of FIG. 2, only the modified portion will be explained.
第２図では平板状のじやま板２５が保持部２７
により吸着剤５層内で隔離筒２２に保持されてい
るのに比較して、第８図では逆円錐状のじやま板
２５ｄが保持部２７ｄにより吸着剤５層内でろ過
材２４ａに接した状態で保持されている点が異な
る。 In FIG.
In contrast, in Fig. 8, the inverted conical wall plate 25d is held in contact with the filter medium 24a within the five layers of adsorbent by the holding part 27d. The difference is that it is maintained in a state.
第２図の変形例である第９図について変形部分
のみ説明する。 Regarding FIG. 9, which is a modification of FIG. 2, only the modified portion will be explained.
第２図では平板状のじやま板２５が保持部２７
により吸着剤５層内で隔離筒２２に保持されてい
るのと２ケ所の蒸発燃料発生源より蒸発燃料を捕
集しているのに比較して、第９図では逆円錐状の
じやま板２５ｅが保持部２７ｅにより吸着剤５層
内でろ過材２４ｃに接した状態で保持されている
点と１ケ所の蒸発燃料発生源からの蒸発燃料を捕
集している点が異なる。 In FIG.
The evaporated fuel is collected from two evaporative fuel generation sources; The difference is that 25e is held in contact with the filter material 24c within five layers of adsorbent by a holding portion 27e, and that it collects evaporated fuel from one evaporated fuel generation source.
第４図の変形例である第１０図について変形部
分のみ説明する。 Regarding FIG. 10, which is a modification of FIG. 4, only the modified portion will be explained.
第４図では縦置の円筒状キヤニスタ４のキヤニ
スタケース１６内壁部に逆円錐状のじやま板２５
ａが保持部２７ａにより保持されており、２ケ所
の蒸発燃料発生源からの蒸発燃料が捕集できる構
造となつているのに比較して、第１０図では横置
の角型状キヤニスタ４のキヤニスタケース１６内
壁に平板状のじやま板２５ｆが保持部２７ｆによ
り保持されており、１ケ所の蒸発燃料発生源から
の蒸発燃料が捕集できる構造となつている点が異
なる。 In Fig. 4, an inverted conical wall plate 25 is formed on the inner wall of the canister case 16 of the vertically placed cylindrical canister 4.
a is held by a holding part 27a, and has a structure that can collect evaporated fuel from two evaporated fuel generation sources, whereas in FIG. The difference is that a flat wall plate 25f is held on the inner wall of the canister case 16 by a holding portion 27f, and the structure is such that the evaporated fuel from one evaporated fuel generation source can be collected.
第１１図は第１０図の断面−の横断面図で
あり、隔離板３１により吸着剤５層が２分割され
ている状態を示している。 FIG. 11 is a cross-sectional view taken from the cross section shown in FIG.
第１２図は第１０図の断面−の横断面図で
あり、キヤニスタケース１６の内壁に保持された
じやま板２５ｆ、じやま板２５ｆに設けられた通
気孔２６ｆ、通路３０ｆの状態を示している。 FIG. 12 is a cross-sectional view taken from the section shown in FIG. 10, and shows the condition of the wall plate 25f held on the inner wall of the canister case 16, the vent hole 26f provided in the wall plate 25f, and the passage 30f. ing.
前記のように構成された本考案装置において、
第１図、第２図の場合、機関停止時において燃料
タンク１で発生した蒸発燃料は所定圧力以上に達
すると圧力調整弁３を開かせて、蒸発燃料通路２
を通り、キヤニスタ４の入口管１７より蒸気室２
０、押え板２３ｂ、ろ過材２４ｂを通り吸着剤５
に捕集される。蒸気室２０より吸着剤５層内に流
入した蒸発燃料は自重及び蒸発燃料の流速により
隔離筒２２の開口方向に沿つて流れようとする
が、隔離筒２２の開口部に対向して設けたじやま
板２５により蒸発燃料の流れ方向が変更されるの
と蒸発燃料の速度が低下することにより、蒸発燃
料は吸着剤５層内の全ての吸着剤５に充分に捕集
される。じやま板２５に設けた通気孔２６はじや
ま板２５下流の吸着剤５にも蒸発燃料が充分吸着
できるよう設けてある。気化器浮子室７内で発生
した蒸発燃料は蒸発燃料通路８を通りキヤニスタ
４の入口管１８より蒸気室２１、押え板２３ａ、
ろ過材２４ａを通り吸着剤５に捕集される。蒸気
室２１より吸着剤５層内に流入した蒸発燃料は自
重及び蒸発燃料の流速によりキヤニスタケース１
６の空気導入口６方向に沿つて流れようとする
が、蒸気室２１に対向して設けたじやま板２５に
より、蒸発燃料の流れ方向が変更されるのと蒸発
燃料の速度が低下することにより、蒸発燃料は吸
着剤５層内で全ての吸着剤５に充分に捕集され
る。この時通路開閉弁９は開いている。吸気管１
４には吸引負圧が作用していないため通路制御弁
１２は閉じており、キヤニスタ５の掃気は行なわ
れない。 In the device of the present invention configured as described above,
In the case of Figures 1 and 2, when the evaporated fuel generated in the fuel tank 1 reaches a predetermined pressure or higher when the engine is stopped, the pressure regulating valve 3 is opened and the evaporated fuel passage 2 is opened.
from the inlet pipe 17 of the canister 4 to the steam chamber 2.
0, the adsorbent 5 passes through the holding plate 23b and the filter material 24b.
is collected by. The evaporated fuel that has flowed into the five adsorbent layers from the vapor chamber 20 tends to flow along the opening direction of the isolation tube 22 due to its own weight and the flow velocity of the evaporated fuel. Since the flow direction of the evaporated fuel is changed by the baffle plate 25 and the velocity of the evaporated fuel is reduced, the evaporated fuel is sufficiently collected by all the adsorbents 5 in the adsorbent 5 layer. The ventilation holes 26 provided in the barrier board 25 are also provided so that the adsorbent 5 downstream of the barrier board 25 can sufficiently adsorb evaporated fuel. The vaporized fuel generated in the vaporizer float chamber 7 passes through the vaporized fuel passage 8 and is transferred from the inlet pipe 18 of the canister 4 to the vapor chamber 21, the holding plate 23a,
It passes through the filter medium 24a and is collected by the adsorbent 5. The evaporated fuel that has flowed into the 5 layers of adsorbent from the vapor chamber 21 is moved to the canister case 1 due to its own weight and the flow velocity of the evaporated fuel.
However, due to the baffle plate 25 provided opposite the steam chamber 21, the flow direction of the evaporated fuel is changed and the speed of the evaporated fuel is reduced. As a result, the evaporated fuel is sufficiently collected by all the adsorbents 5 within the five adsorbent layers. At this time, the passage opening/closing valve 9 is open. Intake pipe 1
Since no suction negative pressure is acting on the canister 4, the passage control valve 12 is closed and the canister 5 is not scavenged.
機関１５のアイドリング運転時になると吸気管
１４には吸引負圧が作用しているが、絞り弁１３
上流側の蒸発燃料抽出孔１０には吸引負圧が作用
していないため、通路制御弁１２は閉じており、
キヤニスタ４の掃気は行なわれない。この時通路
開閉弁９は閉じている。 When the engine 15 is idling, suction negative pressure is acting on the intake pipe 14, but the throttle valve 13
Since suction negative pressure is not acting on the upstream fuel vapor extraction hole 10, the passage control valve 12 is closed.
Scavenging of the canister 4 is not performed. At this time, the passage opening/closing valve 9 is closed.
次に機関１４の低速、加速域になると絞り弁１
３開度の増大に伴ない、絞り弁１３の上流側より
下流側に変化する位置に設けた燃料燃料抽出孔１
０にも吸引負圧が作用するため、通路制御弁１２
が開弁し、キヤニスタ４の空気導入口６より掃気
用空気が導入される。この掃気用空気が吸着剤５
層を通過することにより吸着剤５に捕集されてい
る蒸発燃料が脱離され、掃気用空気と蒸発燃料と
で構成される混合気は混合気通路１１→通路制御
弁１２→蒸発燃料抽出孔１０→吸気管１４を通り
燃焼室にて燃焼される。掃気用空気が吸着剤５層
内に通過する際、じやま板２５により空気通路が
絞られるため掃気用空気の流速が増し、吸着剤５
の細孔内部に吸着されている蒸発燃料も充分掃気
できるため、蒸発燃料の脱離量が増大する。じや
ま板２５に設けた通気孔２６はじやま板２５下流
の吸着剤５にも掃気用空気が充分通過できるよう
設けてある。この時通路開閉弁９は閉じている。 Next, when the engine 14 reaches the low speed and acceleration range, the throttle valve 1
3 Fuel extraction hole 1 provided at a position that changes from the upstream side to the downstream side of the throttle valve 13 as the opening degree increases
Since suction negative pressure also acts on the passage control valve 12
is opened, and scavenging air is introduced from the air inlet 6 of the canister 4. This scavenging air is the adsorbent 5.
By passing through the layer, the evaporated fuel collected on the adsorbent 5 is desorbed, and the mixture composed of scavenging air and evaporated fuel flows through the mixture passage 11 → passage control valve 12 → evaporated fuel extraction hole 10 → Passes through the intake pipe 14 and is burned in the combustion chamber. When the scavenging air passes through the adsorbent 5 layer, the air passage is narrowed by the jamb plate 25, so the flow velocity of the scavenging air increases, and the adsorbent 5
Since the vaporized fuel adsorbed inside the pores can be sufficiently scavenged, the amount of vaporized fuel desorbed increases. The ventilation holes 26 provided in the wall board 25 are also provided so that scavenging air can sufficiently pass through the adsorbent 5 downstream of the wall board 25. At this time, the passage opening/closing valve 9 is closed.
機関１５の停止時、運転時共に、燃料タンク１
内が燃料消費等で負圧になると圧力調整弁３が開
弁し、キヤニスタ４の空気導入口６より燃料タン
ク１内に空気が導入されるため、燃料タンク１内
の圧力は調整されている。 Both when the engine 15 is stopped and when it is running, the fuel tank 1
When the internal pressure becomes negative due to fuel consumption, etc., the pressure regulating valve 3 opens and air is introduced into the fuel tank 1 from the air inlet 6 of the canister 4, so the pressure inside the fuel tank 1 is regulated. .
第２図の変形例である第４図、第６図、第７
図、第８図について、じやま板２５の形状、保持
方法等が異なるのみであり作用は全く同じであ
る。 Figures 4, 6, and 7 are modified examples of Figure 2.
8 and 8, the only difference is the shape of the jamb plate 25, the holding method, etc., and the operation is exactly the same.
第２図の変形例である第９図について、じやま
板２５の形状、保持方法、入口管１８の廃止等が
異なるのみであり作用は全く同じである。 FIG. 9, which is a modification of FIG. 2, is different only in the shape of the barrier plate 25, the method of holding it, the elimination of the inlet pipe 18, etc., and the operation is exactly the same.
第４図の変形例である第１０図について、キヤ
ニスタ４の横置、じやま板２５ｆの形状、保持方
法、入口管１８の廃止等が異なるのみであり作用
は全く同じである。 FIG. 10, which is a modification of FIG. 4, is different only in the horizontal placement of the canister 4, the shape of the jamb plate 25f, the holding method, the elimination of the inlet pipe 18, etc., and the operation is exactly the same.
以上説明した本考案の各実施例に共通な効果
は、
蒸発燃料の吸着時において、燃料溜側から空
気導入口側への蒸発燃料の流れ方向をじやま板
により変更させると同時に蒸発燃料の速度を遅
くさせること及びじやま板に設けた小孔よりじ
やま板直下の吸着剤にも蒸発燃料の拡散が行な
われることにより、全ての吸着剤が、蒸発燃料
を充分に吸着することが可能となる。従つて蒸
発燃料の吸着容量が著しく増大する。 The common effect of each of the embodiments of the present invention described above is that, when adsorbing evaporated fuel, the flow direction of evaporated fuel from the fuel reservoir side to the air inlet side is changed by the deflector plate, and at the same time, the speed of evaporated fuel is changed. By slowing down the evaporative fuel and diffusing the evaporated fuel to the adsorbents directly under the sill board through the small holes provided in the sill board, all the adsorbents are able to sufficiently adsorb evaporated fuel. Become. Therefore, the adsorption capacity for evaporated fuel is significantly increased.
蒸発燃料の脱離時において、じやま板により
掃気用空気の通路面積が減少させられることに
より掃気用空気の流速が増し、その結果吸着剤
表面付近に発生する吸引負圧が大きくなり、吸
着剤の細孔内部に吸着している蒸発燃料が脱離
され易くなる。 When the evaporated fuel is desorbed, the passage area of the scavenging air is reduced by the jamb plate, which increases the flow velocity of the scavenging air.As a result, the suction negative pressure generated near the adsorbent surface increases, and the adsorbent The evaporated fuel adsorbed inside the pores is easily desorbed.
またじやま板に設けた小孔により掃気用空気
が通過するためじやま板下流側に吸着された蒸
発燃料も充分掃気されることにより脱離容量が
著しく増大する。 In addition, since the scavenging air passes through the small holes provided in the wood cutting board, the evaporated fuel adsorbed on the downstream side of the wood cutting board is also sufficiently scavenged, thereby significantly increasing the desorption capacity.
前記，により吸着効率、脱離効率が向上
するため、小容量の吸着剤使用量で多量の蒸発
燃料の排出抑止が可能となり、キヤニスタの小
型化、コストダウン、車輌塔載性向上が可能と
なる。 As the adsorption efficiency and desorption efficiency are improved by the above, it is possible to suppress the emission of a large amount of evaporated fuel by using a small amount of adsorbent, making it possible to downsize the canister, reduce costs, and improve the ability to be mounted on a vehicle. .
掃気空気量を増やすことなく多量の蒸発燃料
制御が可能となるため、混合気濃度への影響も
少なく、アイドリング安定性排出ガスの安定性
の面でも有効である。 Since it is possible to control a large amount of evaporated fuel without increasing the amount of scavenging air, there is little effect on the mixture concentration, and it is also effective in terms of idling stability and exhaust gas stability.
又、第１図において蒸発燃料抽出孔１０の開口
を吸気管１４や気化器ベンチユリー部上流側等の
機関の吸気側に選んでも同様な効果が得られる。 Furthermore, the same effect can be obtained by selecting the opening of the evaporated fuel extraction hole 10 on the intake side of the engine, such as on the upstream side of the intake pipe 14 or the carburetor ventilator section in FIG.
又、蒸発燃料発生源も第１図の場合では燃料タ
ンク１と気化器浮子室７の２ケ所であつたが、そ
れ以上の箇所より捕集したり、又前記いずれか一
方のみより捕集しても同様な効果が得られる。 Also, in the case of Fig. 1, there are two sources of evaporated fuel: the fuel tank 1 and the vaporizer float chamber 7, but it may be collected from more than one location, or it may be collected from only one of the locations. A similar effect can be obtained.
本考案においてはキヤニスタ４の大型化に伴な
い塔載性の面で問題の多いオートバイに関して
は、キヤニスタの小型化ができることにより特に
有利である。 The present invention is particularly advantageous for motorcycles, which have many problems in terms of mountability due to the increase in the size of the canister 4, since the canister can be made smaller.
第１図は蒸発燃料制御装置の一例、第２図は本
考案内容をおり込んだ蒸発燃料制御装置用キヤニ
スタの一実施例を示す断面図、第３図は第２図の
断面−の横断面図、第４図は第２図の変形
例、第５図は第４図の断面−の横断面図、第
６図乃至第１０図は第２図の変形例、第１１図は
第１０図の断面−の横断面図、第１２図は第
１０図の断面−の横断面図を示す。
４……キヤニスタ、５……吸着剤、６……空気
導入口、１６……キヤニスタケース、１７，１８
……蒸発燃料入口管、１９……蒸発燃料出口管、
２５，２５ａ，２５ｂ，２５ｃ，２５ｄ，２５
ｅ，２５ｆ……じやま板、２６，２６ａ，２６
ｂ，２６ｃ，２６ｄ，２６ｅ，２６ｆ……通気
孔。
Fig. 1 is an example of an evaporative fuel control device, Fig. 2 is a sectional view showing an embodiment of a canister for the evaporative fuel control device incorporating the content of the present invention, and Fig. 3 is a cross-sectional view of the cross section of Fig. 2. Figure 4 is a modification of Figure 2, Figure 5 is a cross-sectional view of Figure 4, Figures 6 to 10 are variations of Figure 2, and Figure 11 is Figure 10. 12 shows a cross-sectional view of the cross-section of FIG. 10. 4... Canister, 5... Adsorbent, 6... Air inlet, 16... Canister case, 17, 18
...Evaporative fuel inlet pipe, 19...Evaporative fuel outlet pipe,
25, 25a, 25b, 25c, 25d, 25
e, 25f... Jiyama board, 26, 26a, 26
b, 26c, 26d, 26e, 26f...Vent holes.
Claims (1)
前記蒸発燃料取入口と反対側にパージ空気導入口
を形成し、じやま板を前記吸着剤層内に、前記蒸
発燃料取入口の端部と対面させて配置し、該じや
ま板には、多数の小孔を設けるとともにじやま板
外端部にはキヤニスタケース内壁面との間に大き
な間げきを設けて、じやま板との外周部に流体通
路を形成したことを特徴とする蒸発燃料制御装置
用キヤニスタ。 Extend the end of the vaporized fuel intake to the adsorbent layer,
A purge air inlet is formed on the opposite side of the evaporated fuel inlet, and a diagonal plate is disposed within the adsorbent layer to face an end of the evaporated fuel inlet, and the diagonal plate includes: An evaporator characterized by having a large number of small holes and a large gap between the outer end of the shim plate and the inner wall surface of the canister case to form a fluid passage around the outer periphery of the shim plate. Canister for fuel control device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1058081U JPS6115245Y2 (en) | 1981-01-27 | 1981-01-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1058081U JPS6115245Y2 (en) | 1981-01-27 | 1981-01-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57123953U JPS57123953U (en) | 1982-08-02 |
| JPS6115245Y2 true JPS6115245Y2 (en) | 1986-05-12 |
Family
ID=29808738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1058081U Expired JPS6115245Y2 (en) | 1981-01-27 | 1981-01-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6115245Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5301482B2 (en) * | 2010-02-18 | 2013-09-25 | 愛三工業株式会社 | Canister |
-
1981
- 1981-01-27 JP JP1058081U patent/JPS6115245Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57123953U (en) | 1982-08-02 |
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