JPH0558926B2 - - Google Patents
Info
- Publication number
- JPH0558926B2 JPH0558926B2 JP59055241A JP5524184A JPH0558926B2 JP H0558926 B2 JPH0558926 B2 JP H0558926B2 JP 59055241 A JP59055241 A JP 59055241A JP 5524184 A JP5524184 A JP 5524184A JP H0558926 B2 JPH0558926 B2 JP H0558926B2
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- injection pipe
- fuel injection
- small chamber
- fuel tank
- 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 - Lifetime
Links
- 239000000446 fuel Substances 0.000 claims description 149
- 238000002347 injection Methods 0.000 claims description 48
- 239000007924 injection Substances 0.000 claims description 48
- 239000002828 fuel tank Substances 0.000 claims description 42
- 230000000630 rising effect Effects 0.000 claims description 3
- 239000007788 liquid Substances 0.000 description 8
- 238000005192 partition Methods 0.000 description 6
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 3
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000003915 air pollution Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000005182 tip of the tongue Anatomy 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D19/00—Degasification of liquids
- B01D19/0063—Regulation, control including valves and floats
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K15/035—Fuel tanks characterised by venting means
- B60K15/03504—Fuel tanks characterised by venting means adapted to avoid loss of fuel or fuel vapour, e.g. with vapour recovery systems
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K15/04—Tank inlets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K15/04—Tank inlets
- B60K2015/0458—Details of the tank inlet
- B60K2015/048—Arrangements for sealing the fuel inlet during filling
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明は車両用、特に自動車用の燃料タンクに
関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a fuel tank for vehicles, in particular for motor vehicles.
従来技術
内燃機関により駆動される車両は通常燃料タン
クを具えており、燃料タンク内の燃料が少なくな
ると燃料タンクの燃料注入口に取付けられたキヤ
ツプをはずして燃料注入口内へ燃料給油ノズルを
挿入し、燃料給油ノズルから燃料タンク内に燃料
を注入するようにしている。しかしながらこのと
きに燃料給油ノズルから噴出した燃料が燃料タン
ク内の底部に溜まつている燃料と激しく衝突する
と燃料タンク内の底部に溜まつている燃料が泡立
ち、多量の燃料蒸気が発生する。次いでこの燃料
蒸気が燃料注入口から外気中に流出し、斯くして
大気汚染をひき起こすことになる。Prior Art Vehicles driven by internal combustion engines are usually equipped with a fuel tank, and when the fuel in the fuel tank becomes low, the cap attached to the fuel inlet of the fuel tank is removed and the fuel nozzle is inserted into the fuel inlet. , the fuel is injected into the fuel tank from the fuel supply nozzle. However, at this time, when the fuel ejected from the fuel supply nozzle violently collides with the fuel accumulated at the bottom of the fuel tank, the fuel accumulated at the bottom of the fuel tank bubbles and a large amount of fuel vapor is generated. This fuel vapor then escapes from the fuel inlet into the outside atmosphere, thus causing air pollution.
そこでこのように燃料注入時に燃料蒸気が外気
中に流出するのを抑制するために燃料注入管を燃
料タンクの底部まで延設した燃料タンクが公知で
ある（実開昭49−76113号公報参照）。この燃料タ
ンクでは燃料注入時に燃料液面が燃料注入管内ま
で上昇するとその後は燃料注入管内のみの燃料が
泡立つことになるので燃料注入時に発生する燃料
蒸気は少量となり、斯くして燃料注入口から外気
中に流出する燃料蒸気の量が低減せしめられるこ
とになる。 Therefore, a fuel tank is known in which a fuel injection pipe is extended to the bottom of the fuel tank in order to prevent fuel vapor from flowing out into the outside air when fuel is injected (see Japanese Utility Model Application Publication No. 76113/1983). . In this fuel tank, when the fuel level rises to the inside of the fuel injection pipe when fuel is injected, the fuel only bubbles inside the fuel injection pipe, so the amount of fuel vapor generated when fuel is injected is small, and in this way, the outside air flows from the fuel injection port. The amount of fuel vapor escaping into the fuel tank will be reduced.
また、この実開昭49−76113号公報には燃料タ
ンクの底壁面から間隔を隔てて上方に延びる隔壁
を設け、この隔壁により小室を形成すると共にこ
の小室の頂部に燃料注入管を開口せしめるように
した燃料タンクが開示されている。この燃料タン
クでは燃料注入時に燃料液面が隔壁下方に形成さ
れた間隔の高さよりも高くなるとその後は小室内
のみの燃料が泡立つことになるので燃料注入時に
発生する燃料蒸気は少量となり、斯くして燃料注
入口から外気中に流出する燃料蒸気の量が低減せ
しめられる。 In addition, in this Japanese Utility Model Application Publication No. 49-76113, a partition wall is provided which extends upwardly at a distance from the bottom wall of the fuel tank, and a small chamber is formed by this partition wall, and a fuel injection pipe is opened at the top of this small chamber. The fuel tank is disclosed. In this fuel tank, when the fuel level becomes higher than the height of the gap formed below the partition wall, the fuel only in the small chamber will bubble, so the amount of fuel vapor generated during fuel injection will be small. As a result, the amount of fuel vapor flowing out from the fuel inlet into the outside air is reduced.
ところでこの燃料タンクでは燃料注入時に燃料
液面が燃料注入管内まで上昇した後は上述したよ
うに燃料注入管内のみの燃料が泡立つので燃料蒸
気の発生が抑制せしめられるが燃料液面が燃料注
入管内まで上昇するまでの間は燃料給油ノズルか
ら噴出した燃料によつて燃料タンク内の燃料全体
がかき乱され、斯くして燃料タンク内の燃料全体
が泡立つてしまう。その結果、燃料液面が燃料注
入管内まで上昇するまでの間は多量の燃料蒸気が
発生し、斯くしてこの間は多量の燃料蒸気が外気
中に放出されることになる。 By the way, in this fuel tank, after the fuel level rises to the inside of the fuel injection pipe when fuel is injected, as mentioned above, the fuel only bubbles inside the fuel injection pipe, which suppresses the generation of fuel vapor. Until it rises, the entire fuel in the fuel tank is disturbed by the fuel ejected from the fuel supply nozzle, and thus the entire fuel in the fuel tank becomes foamy. As a result, a large amount of fuel vapor is generated until the fuel liquid level rises to the inside of the fuel injection pipe, and thus a large amount of fuel vapor is released into the outside air during this period.
この場合、燃料液面が燃料注入管内まで上昇す
るまでの時間が短かければこの間に外気中に放出
される燃料蒸気の量はそれほど多くはならないが
上述の燃料タンクでは注入された燃料が燃料タン
ク内の全体に広がるので燃料液面が燃料注入管内
まで上昇するのに時間を要し、斯くしてこの間に
多量の燃料蒸気が発生するために多量の燃料蒸気
が外気中に流出することになる。また、このよう
な多量の燃料蒸気の流出は上述のように燃料タン
ク内に小室を設けた場合でも同様に生ずるが更に
この場合には燃料注入管が小室の頂部に開口して
いるので液面が上昇した後でも小室内で多量の燃
料蒸気が発生し、斯くして多量の燃料蒸気が外気
中に流出し続けることになる。 In this case, if the time required for the fuel level to rise to the inside of the fuel injection pipe is short, the amount of fuel vapor released into the outside air during this time will not be so large. Since the fuel liquid level spreads throughout the inside of the fuel injection pipe, it takes time for the fuel liquid level to rise to the inside of the fuel injection pipe, and a large amount of fuel vapor is generated during this time, resulting in a large amount of fuel vapor flowing out into the outside air. . In addition, the outflow of such a large amount of fuel vapor occurs similarly even when a small chamber is provided in the fuel tank as described above, but in this case, the fuel injection pipe opens at the top of the small chamber, so the liquid level A large amount of fuel vapor is generated within the chamber even after the temperature rises, and thus a large amount of fuel vapor continues to leak into the outside air.
発明の目的
本発明は燃料注入時に燃料蒸気が発生するのを
抑制して外気中に流出する燃料蒸気の量を低減す
るようにした燃料タンクを提供することにある。OBJECTS OF THE INVENTION An object of the present invention is to provide a fuel tank that suppresses the generation of fuel vapor during fuel injection and reduces the amount of fuel vapor that flows out into the outside air.
発明の構成
本発明の構成は、燃料注入管を具備した燃料タ
ンクにおいて、燃料タンクの底部に立上がり壁に
よつて包囲された小室を形成すると共にこの小室
を小室の頂部に形成された開口部のみを介して燃
料タンク内に連通させ、燃料注入管を燃料タンク
内に形成された小室内まで延設して燃料注入管の
燃料流出口を小室内に開口せしめるようにしたこ
とにある。Structure of the Invention The structure of the present invention is that, in a fuel tank equipped with a fuel injection pipe, a small chamber is formed at the bottom of the fuel tank surrounded by a rising wall, and this small chamber is formed only by an opening formed at the top of the small chamber. The fuel injection pipe is communicated with the inside of the fuel tank through the fuel tank, and the fuel injection pipe is extended into a small chamber formed in the fuel tank, so that the fuel outlet of the fuel injection pipe is opened into the small chamber.
実施例
第１図を参照すると、１は燃料タンク、２は燃
料注入管、３は燃料注入管２の燃料注入口４に着
脱自在に取付けられたキヤツプを夫々示す。第１
図および第２図を参照すると、燃料注入管２内に
は中空円筒状をなすノズルガイド５が固着され、
このノズルガイド５はほぼ一様断面の中空円筒部
５ａと、キヤツプ３に向けて拡開するラツパ状入
口端部５ｂと、燃料注入管２の軸線に対して垂直
をなす環状端板５ｃと、ノズルガイド５内に形成
された環状隔壁５ｄとにより構成される。ノズル
ガイド５の内部には隔壁５ｄにより分離された弁
室６および環状通路７が形成され、環状通路７に
は蒸気燃料流入口８が形成される。ノズルガイド
５の中空円筒部５ａはその内部にほぼ一様断面の
ノズル挿入通路９を形成し、このノズル挿入通路
９内には燃料注入時に第２図において鎖線で示す
ように燃料給油ノズル１０が挿入される。環状隔
壁５ｄ上には弁ポート１１が形成され、この弁ポ
ート１１の開閉制御をする開閉制御弁１２が弁室
６内に配置される。開閉制御弁１２は第２図およ
び第３図に示すように燃料注入管２の内周面に沿
つて摺動可能な中空円筒部１２ａと、弁ポート１
１の開閉制御をする弁体の役目を果す環状下端部
１２ｂと、ばねを保持するための屈曲上端部１２
ｃと、ノズルガイド５のラツパ状入口端部５ｂを
越えて上方に突出する舌状部１２ｄとにより構成
される。開閉制御弁１２の屈曲上端部１２ｃとノ
ズルガイド５間には圧縮ばね１３が挿入され、開
閉制御弁１２はこの圧縮ばね１３のばね力によつ
て常時上方に付勢される。弁室６の最上端部には
蒸発燃料流出口１４が形成され、この蒸発燃料流
出口１４は第１図に示すようにキヤニスタ１５に
連結される。Embodiment Referring to FIG. 1, 1 is a fuel tank, 2 is a fuel injection pipe, and 3 is a cap detachably attached to a fuel injection port 4 of the fuel injection pipe 2, respectively. 1st
Referring to the figure and FIG. 2, a hollow cylindrical nozzle guide 5 is fixed inside the fuel injection pipe 2.
This nozzle guide 5 includes a hollow cylindrical portion 5a with a substantially uniform cross section, a flap-shaped inlet end portion 5b that widens toward the cap 3, and an annular end plate 5c perpendicular to the axis of the fuel injection tube 2. An annular partition wall 5d formed within the nozzle guide 5. A valve chamber 6 and an annular passage 7 separated by a partition wall 5d are formed inside the nozzle guide 5, and a steam fuel inlet 8 is formed in the annular passage 7. The hollow cylindrical portion 5a of the nozzle guide 5 has a nozzle insertion passage 9 having a substantially uniform cross section formed therein, and a fuel supply nozzle 10 is inserted into the nozzle insertion passage 9 as shown by the chain line in FIG. 2 during fuel injection. inserted. A valve port 11 is formed on the annular partition wall 5d, and an opening/closing control valve 12 for controlling opening/closing of the valve port 11 is arranged in the valve chamber 6. As shown in FIGS. 2 and 3, the opening/closing control valve 12 includes a hollow cylindrical portion 12a that is slidable along the inner peripheral surface of the fuel injection pipe 2, and a valve port 1.
An annular lower end portion 12b that serves as a valve body for controlling the opening and closing of 1, and a bent upper end portion 12 for holding a spring.
c, and a tongue-shaped portion 12d that projects upward beyond the tongue-shaped inlet end 5b of the nozzle guide 5. A compression spring 13 is inserted between the bent upper end 12c of the opening/closing control valve 12 and the nozzle guide 5, and the opening/closing control valve 12 is always urged upward by the spring force of the compression spring 13. A fuel vapor outlet 14 is formed at the uppermost end of the valve chamber 6, and the fuel vapor outlet 14 is connected to a canister 15 as shown in FIG.
第２図に示されるように燃料注入管２の燃料注
入口４の内周面上には内ねじ山１６が螺設され、
キヤツプ３の外周面上には内ねじ山１６と螺合可
能な外ねじ山１７が螺設される。キヤツプ３の内
側端面上には開閉制御弁１２の舌状部１２ｄの先
端部と係合可能な当接板１８が摺動可能に取付け
られ、当接板１８とキヤツプ３間には当接板１８
を常時下方に向けて付勢する圧縮ばね１９が挿入
される。この圧縮ばね１９は圧縮ばね１３よりも
強いばね力を有する。 As shown in FIG. 2, an internal thread 16 is screwed onto the inner peripheral surface of the fuel injection port 4 of the fuel injection pipe 2.
An outer thread 17 that can be screwed into the inner thread 16 is screwed onto the outer peripheral surface of the cap 3. A contact plate 18 that can engage with the tip of the tongue 12d of the on-off control valve 12 is slidably attached to the inner end surface of the cap 3, and a contact plate 18 is provided between the contact plate 18 and the cap 3. 18
A compression spring 19 is inserted that constantly biases the spring downward. This compression spring 19 has a stronger spring force than the compression spring 13.
第１図に示されるように燃料タンク１の底壁面
２０の一部２０ａは下方に膨張せしめられ、この
膨出部２０ａ内には立上り壁２１によつて包囲さ
れた小室２２が形成される。この小室２２は小室
２２の頂部に形成された開口部のみを介して燃料
タンク１の内部に連通している。燃料注入管２の
下端部は燃料タンク１の内部を下方に向けて小室
２２内まで延び、燃料注入管２の燃料流出口２３
は小室２２内に開口する。燃料タンク１の上壁面
２４には蒸発燃料流出口２５が形成され、この蒸
発燃料流出口２５は環状通路７に形成された蒸発
燃料流入口８に連通管２６を介して連結される。 As shown in FIG. 1, a portion 20a of the bottom wall surface 20 of the fuel tank 1 is expanded downward, and a small chamber 22 surrounded by a rising wall 21 is formed within this expanded portion 20a. This small chamber 22 communicates with the inside of the fuel tank 1 only through an opening formed at the top of the small chamber 22. The lower end of the fuel injection pipe 2 extends downward into the small chamber 22 inside the fuel tank 1, and the fuel outlet 23 of the fuel injection pipe 2 extends downward into the small chamber 22.
opens into the small chamber 22. A fuel vapor outlet 25 is formed in the upper wall surface 24 of the fuel tank 1 , and the fuel vapor outlet 25 is connected to a fuel vapor inlet 8 formed in the annular passage 7 via a communication pipe 26 .
第１図および第２図に示すように燃料注入口４
がキヤツプ３によつて閉鎖されているときには当
接板１８が開閉制御弁１２の舌状部１２ｄに当接
して開閉制御弁１２を押し下げ、従つて開閉制御
弁１２の環状下端部１２ｂが弁ポート１１を閉鎖
している。このとき燃料タンク１内の蒸発燃料は
キヤニスタ１５に逃げることができず、斯くして
燃料タンク１内には蒸発燃料が充満している。次
いで燃料を給油するためにキヤツプ３をわずかば
かり弛めるとキヤツプ３が上昇するために開閉制
御弁１２が上昇し、斯くして開閉制御弁１２の環
状下端部１２ｂが弁ポート１１を開口する。その
結果、燃料タンク１内の蒸発燃料は連通管２６を
介して環状通路７内に流入し、次いでこの蒸発燃
料は弁ポート１１、弁室６および蒸発燃料流出口
１４を介してキヤニスタ１５に送り込まれる。次
いでキヤツプ３を更に弛めてキヤツプ３を燃料注
入口４からとりはずす。このとき燃料タンク１内
の蒸発燃料は既にキヤニスタ１５に送り込まれて
おり、燃料注入管２内に溜まつているわずかな蒸
発燃料が燃料注入口４から外気中に流出するだけ
なので外気中に流出する蒸発燃料は極めて小量で
ある。次いで燃料給油ノズル１０から燃料が供給
され、この燃料は小室２２内に送り込まれる。こ
のとき小室２２内に燃料が充満していれば供給燃
料は燃料注入管２内の燃料とのみ衝突する。従つ
てこのときには燃料注入管２内の燃料のみが泡立
ち、斯くしてこのとき発生する燃料蒸気は小量と
なる。また、小室２２の底部のみに燃料が溜まつ
ているときには小室２２内の燃料全体が燃料注入
管２から供給される燃料によつて泡立つことにな
るが小室２２の容積は小さく、従つてこのとき発
生する燃料蒸気は小量となる。また、小室２２の
容積は小さいので燃料の注入を開始すれば小室２
２内の燃料の液面は急速に上昇し、燃料の液面は
短時間のうちに燃料注入管２内まで上昇する。従
つて、小室２２内の燃料全体が泡立つ期間が短か
くなるためにその分だけ燃料蒸気の発生量が少な
くなる。このように燃料注入管２から燃料が燃料
タンク１内に供給されると燃料蒸気が発生するが
このとき発生する燃料蒸気は小量である。従つて
燃料給油ノズル１０とノズルガイド５間から蒸発
燃料が流出してもその量は極めて小量である。次
いで燃料給油ノズル１０は引き抜かれ、キヤツプ
３が燃料注入口４に螺着される。キヤニスタ１５
に送り込まれた蒸発燃料はキヤニスタ１５内の活
性炭に吸着される。活性炭に吸着された燃料蒸気
は予め定められた機関運転状態のときに図示しな
い導管を介して機関吸気通路内に吸引される。 As shown in FIGS. 1 and 2, the fuel inlet 4
When the opening/closing control valve 12 is closed by the cap 3, the contact plate 18 comes into contact with the tongue-shaped portion 12d of the opening/closing control valve 12 and pushes down the opening/closing control valve 12, so that the annular lower end 12b of the opening/closing control valve 12 is connected to the valve port. 11 are closed. At this time, the evaporated fuel in the fuel tank 1 cannot escape to the canister 15, and thus the fuel tank 1 is filled with evaporated fuel. Next, when the cap 3 is slightly loosened to supply fuel, the cap 3 rises, so that the on-off control valve 12 rises, and the annular lower end 12b of the on-off control valve 12 opens the valve port 11. As a result, the evaporated fuel in the fuel tank 1 flows into the annular passage 7 through the communication pipe 26, and then this evaporated fuel is sent into the canister 15 through the valve port 11, the valve chamber 6, and the evaporated fuel outlet 14. It will be done. Next, the cap 3 is further loosened and the cap 3 is removed from the fuel inlet 4. At this time, the evaporated fuel in the fuel tank 1 has already been sent to the canister 15, and only a small amount of evaporated fuel accumulated in the fuel injection pipe 2 flows out from the fuel injection port 4 into the outside air. The amount of evaporated fuel produced is extremely small. Next, fuel is supplied from the fuel supply nozzle 10, and this fuel is sent into the small chamber 22. At this time, if the small chamber 22 is full of fuel, the supplied fuel collides only with the fuel in the fuel injection pipe 2. Therefore, at this time, only the fuel in the fuel injection pipe 2 bubbles, and thus the amount of fuel vapor generated at this time is small. Further, when fuel is accumulated only at the bottom of the small chamber 22, the entire fuel in the small chamber 22 will be bubbled by the fuel supplied from the fuel injection pipe 2, but the volume of the small chamber 22 is small, so at this time The amount of fuel vapor generated is small. In addition, since the volume of the small chamber 22 is small, once the fuel injection starts, the small chamber 22
The liquid level of the fuel in the fuel injection pipe 2 rises rapidly, and the liquid level of the fuel rises to the inside of the fuel injection pipe 2 in a short period of time. Therefore, the period during which the entire fuel in the small chamber 22 bubbles is shortened, and the amount of fuel vapor generated is reduced accordingly. When fuel is supplied into the fuel tank 1 from the fuel injection pipe 2 in this manner, fuel vapor is generated, but the amount of fuel vapor generated at this time is small. Therefore, even if evaporated fuel flows out from between the fuel supply nozzle 10 and the nozzle guide 5, the amount is extremely small. Next, the fuel supply nozzle 10 is pulled out and the cap 3 is screwed onto the fuel inlet 4. Canista 15
The vaporized fuel sent into the canister 15 is adsorbed by the activated carbon inside the canister 15. The fuel vapor adsorbed on the activated carbon is sucked into the engine intake passage through a conduit (not shown) during predetermined engine operating conditions.
発明の効果
小室内まで燃料注入管を延設すると小室内の燃
料の液面が燃料注入管の燃料流出口よりも低いと
きに燃料の注入を開始してもこのとき泡立つ燃料
は小室内の燃料だけであり、しかも小室内の燃料
の液面は短時間のうちに燃料注入管内まで上昇す
るので発生する燃料蒸気の量が少なくなる。従つ
て燃料の注入開始後燃料注入口から外気中に流出
する燃料蒸気の量を低減することができる。Effects of the Invention If the fuel injection pipe is extended to the small chamber, even if fuel injection is started when the liquid level of the fuel in the small chamber is lower than the fuel outlet of the fuel injection pipe, the fuel that bubbles at this time will be the fuel inside the small chamber. Moreover, since the liquid level of the fuel in the small chamber rises to the inside of the fuel injection pipe within a short time, the amount of fuel vapor generated is reduced. Therefore, the amount of fuel vapor flowing out into the outside air from the fuel injection port after the start of fuel injection can be reduced.
第１図は本発明による燃料タンクの側面断面
図、第２図は第１図の一部拡大図、第３図は開閉
制御弁の断面斜視図である。
１……燃料タンク、２……燃料注入管、３……
キヤツプ、５……ノズルガイド、６……弁室、１
１……弁ポート、１２……開閉制御弁、１５……
キヤニスタ。
FIG. 1 is a side sectional view of a fuel tank according to the present invention, FIG. 2 is a partially enlarged view of FIG. 1, and FIG. 3 is a sectional perspective view of an on-off control valve. 1...Fuel tank, 2...Fuel injection pipe, 3...
Cap, 5... Nozzle guide, 6... Valve chamber, 1
1...Valve port, 12...Opening/closing control valve, 15...
Canista.
Claims (1)
燃料タンクの底部に立上がり壁によつて包囲され
た小室を形成すると共に該小室を該小室の頂部に
形成された開口部のみを介して燃料タンク内に連
通させ、上記燃料注入管を燃料タンク内に形成さ
れた該小室内まで延設して燃料注入管の燃料流出
口を該小室内に開口せしめるようにした車両用燃
料タンク。1 In a fuel tank equipped with a fuel injection pipe,
A small chamber surrounded by a rising wall is formed at the bottom of the fuel tank, and the small chamber is communicated with the fuel tank only through an opening formed at the top of the small chamber, and the fuel injection pipe is inserted into the fuel tank. A fuel tank for a vehicle, which extends into the small chamber formed in the fuel tank, and has a fuel outlet of a fuel injection pipe opened into the small chamber.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59055241A JPS60199729A (en) | 1984-03-24 | 1984-03-24 | Fuel tank for car |
| US06/715,159 US4701198A (en) | 1984-03-24 | 1985-03-22 | Fuel tank for use in a motor vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59055241A JPS60199729A (en) | 1984-03-24 | 1984-03-24 | Fuel tank for car |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60199729A JPS60199729A (en) | 1985-10-09 |
| JPH0558926B2 true JPH0558926B2 (en) | 1993-08-27 |
Family
ID=12993098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59055241A Granted JPS60199729A (en) | 1984-03-24 | 1984-03-24 | Fuel tank for car |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60199729A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4715509A (en) * | 1985-07-31 | 1987-12-29 | Toyota Jidosha Kabushiki Kaisha | Fuel filler conduit |
| US4770677A (en) * | 1986-03-31 | 1988-09-13 | Stant Inc. | Vapor recovery system |
| JPS6323534A (en) * | 1986-07-16 | 1988-01-30 | Matsushita Electric Ind Co Ltd | Manufacture of magnet-integrated coreless armature |
| JPH0535854Y2 (en) * | 1987-05-27 | 1993-09-10 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5722663B2 (en) * | 1972-09-25 | 1982-05-14 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6023501Y2 (en) * | 1980-07-12 | 1985-07-12 | マツダ株式会社 | Automobile evaporative fuel control device |
-
1984
- 1984-03-24 JP JP59055241A patent/JPS60199729A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5722663B2 (en) * | 1972-09-25 | 1982-05-14 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60199729A (en) | 1985-10-09 |
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