JPH018416Y2 - - Google Patents
Info
- Publication number
- JPH018416Y2 JPH018416Y2 JP1982020348U JP2034882U JPH018416Y2 JP H018416 Y2 JPH018416 Y2 JP H018416Y2 JP 1982020348 U JP1982020348 U JP 1982020348U JP 2034882 U JP2034882 U JP 2034882U JP H018416 Y2 JPH018416 Y2 JP H018416Y2
- Authority
- JP
- Japan
- Prior art keywords
- air breather
- valve chamber
- breather passage
- 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
- 239000002828 fuel tank Substances 0.000 claims description 13
- 239000000446 fuel Substances 0.000 claims description 11
- 230000005484 gravity Effects 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 description 8
- 239000010959 steel Substances 0.000 description 8
- 230000002265 prevention Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Landscapes
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
- Check Valves (AREA)
Description
【考案の詳細な説明】
本考案は車両の横転時に燃料タンクのエアブリ
ーザ通路から燃料が流出するのを防止する燃料漏
れ防止装置に関するものである。[Detailed Description of the Invention] The present invention relates to a fuel leak prevention device that prevents fuel from flowing out from an air breather passage of a fuel tank when a vehicle rolls over.
以下本考案の実施例を第１図乃至第４図に基づ
いて詳細に説明する。第１図は図示されない車体
に装着された燃料タンク１を車体後方より視認し
た背面図であり、紙面に直角方向が車体前後方向
に一致している。第１図において燃料タンク１の
上面には燃料タンク１内のエアを排出するエアブ
リーザ通路２が設けられ同エアブリーザ通路は燃
料タンク１の側面延長線上を越えて延設されて図
示されない上端は大気に開放されている。さらに
上記エアブリーザ通路２の途中には水平面Ｓに対
する角度θを略45度で斜交する傾斜通路３が燃料
タンク１の外周部近傍に設けられ、同傾斜通路内
の一部は第１部材４と第２部材５とをネジ部６で
結合した弁７により形成されている。上記第１部
材４は円筒状かつ上端８は円錐台状に縮径する弁
室９を有し、同弁室には弁体である鋼球１０が遊
挿され鋼球１０が弁室９の上端８に移動するとエ
アブリーザ通路２を閉塞するようになつている。
さらに弁室９の下端に位置する第２部材５の上方
には断面矩形の開口１１が断面円形の通路１２に
連続して形成され同開口は鋼球１０では閉塞でき
ないような大きさに形成されている。 Embodiments of the present invention will be described in detail below with reference to FIGS. 1 to 4. FIG. 1 is a rear view of a fuel tank 1 attached to a vehicle body (not shown), viewed from the rear of the vehicle body, and the direction perpendicular to the plane of the drawing coincides with the longitudinal direction of the vehicle body. In FIG. 1, an air breather passage 2 is provided on the upper surface of a fuel tank 1 to discharge air from within the fuel tank 1. It's open. Further, in the middle of the air breather passage 2, an inclined passage 3 which obliquely crosses the horizontal plane S at an angle θ of approximately 45 degrees is provided near the outer circumference of the fuel tank 1, and a part of the inclined passage is connected to the first member 4. It is formed by a valve 7 connected to a second member 5 through a threaded portion 6. The first member 4 has a cylindrical shape, and the upper end 8 has a valve chamber 9 whose diameter is reduced into a truncated cone shape, and a steel ball 10 serving as a valve body is loosely inserted into the valve chamber. When moved to the upper end 8, the air breather passage 2 is closed.
Further, an opening 11 having a rectangular cross section is formed above the second member 5 located at the lower end of the valve chamber 9 and is continuous with a passage 12 having a circular cross section. ing.
以下上記弁７の作用を第４図ａ乃至ｄに基づい
て説明する。まずａは通常の車両走行状態におけ
る燃料タンク１を示しこの場合には鋼球１０は弁
室９の下端に当接しエアブリーザ通路２は連通さ
れているが燃料タンク１内の燃料はエアブリーザ
通路２より下方に位置しているため燃料はエアブ
リーザ通路２からは流出しない。次に車両がａの
状態から右方へ90度横転してｂの状態になると鋼
球１０は弁室９の下端に当接しエアブリーザ通路
２は連通されているがエアブリーザ通路２が燃料
タンク１の側面延長線上を越えて延設されている
ため燃料が弁室９まで達せず燃料はエアブリーザ
通路２から流出しない。さらに車両がｂの状態か
ら90度右方へ横転してｃの状態になると鋼球１０
は弁室９の上端８側に移動しエアブリーザ通路２
を閉塞するため燃料はエアブリーザ通路２から流
出しない。また車両がｃの状態から90度右方へ横
転してｄの状態になると鋼球１０は弁室９の上端
８側に移動しエアブリーザ通路２を閉塞するため
燃料はエアブリーザ通路２から流出しない。 The operation of the valve 7 will be explained below with reference to FIGS. 4a to 4d. First, a shows the fuel tank 1 in a normal vehicle running state, and in this case, the steel ball 10 is in contact with the lower end of the valve chamber 9 and the air breather passage 2 is in communication with the fuel tank 1. Since it is located below, fuel does not flow out from the air breather passage 2. Next, when the vehicle rolls 90 degrees to the right from state a and enters state b, the steel ball 10 contacts the lower end of the valve chamber 9, and the air breather passage 2 is in communication with the fuel tank 1. Since it extends beyond the side extension line, the fuel does not reach the valve chamber 9 and does not flow out from the air breather passage 2. Furthermore, when the vehicle rolls over 90 degrees to the right from state b and enters state c, the steel ball 10
moves to the upper end 8 side of the valve chamber 9 and air breather passage 2
Since the air breather passage 2 is blocked, fuel does not flow out from the air breather passage 2. Further, when the vehicle rolls over 90 degrees to the right from state c to state d, the steel ball 10 moves to the upper end 8 side of the valve chamber 9 and blocks the air breather passage 2, so that fuel does not flow out from the air breather passage 2.
従つて本考案によれば車両が横転したときエア
ブリーザ通路２に設けられた鋼球１０が弁室９内
を移動してエアブリーザ通路２より燃料が流出可
能な状態においてはエアブリーザ通路２を閉塞す
るためエアブリーザ通路２かられ燃料の漏れを防
止できるという効果を奏する。 Therefore, according to the present invention, when the vehicle rolls over, the steel ball 10 provided in the air breather passage 2 moves within the valve chamber 9 and blocks the air breather passage 2 in a state where fuel can flow out from the air breather passage 2. This has the effect of preventing fuel from leaking from the air breather passage 2.
第１図は本考案の実施例における燃料タンク１
を図示されない車体に装着した状態で車体後方か
ら視認した背面図、第２図は第１図部の拡大断
面図、第３図は鋼球１０を省略して示す第２図
線に沿う矢視図、第４図は本考案の実施例におけ
る燃料漏れ防止の説明図である。
１：燃料タンク、２：エアブリーザ通路、３：
傾斜通路、７：弁、９：弁室、１０：弁体（鋼
球）。
Figure 1 shows a fuel tank 1 in an embodiment of the present invention.
2 is an enlarged sectional view of the part in FIG. 1, and FIG. 3 is a view taken along the line in FIG. 2 with the steel ball 10 omitted. 4 are explanatory diagrams of fuel leakage prevention in an embodiment of the present invention. 1: Fuel tank, 2: Air breather passage, 3:
Inclined passage, 7: valve, 9: valve chamber, 10: valve body (steel ball).
Claims (1)
を越えて延設され、同タンクのエアを排出するエ
アブリーザ通路の途中に水平面に対して略45度に
斜交する傾斜通路を同燃料タンク外周部近傍に設
け、同傾斜通路内に矩形開口が下端に形成され且
つ燃料より大きい比重を有した球状の弁体が遊挿
された弁室を形成し、上記弁体が上記弁室の上端
に当接すると上記エアブリーザ通路を閉塞し、上
記弁体が上記弁室の下端に当接しているときには
上記矩形開口を開放して上記エアブリーザ通路を
連通するようにしたことを特徴とする燃料タンク
の燃料漏れ防止装置。 Near the outer periphery of the fuel tank, an inclined passage that intersects at approximately 45 degrees with respect to the horizontal plane is installed in the middle of the air breather passage that extends from the top surface of the fuel tank beyond the extension line of the side of the tank and discharges air from the tank. A rectangular opening is formed at the lower end in the inclined passage, and a spherical valve body having a specific gravity greater than the fuel is loosely inserted into the valve chamber, and the valve chamber is in contact with the upper end of the valve chamber. Then, the air breather passage is closed, and when the valve body is in contact with the lower end of the valve chamber, the rectangular opening is opened to communicate with the air breather passage, thereby preventing fuel leakage of the fuel tank. Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2034882U JPS58122625U (en) | 1982-02-15 | 1982-02-15 | Fuel tank fuel leak prevention device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2034882U JPS58122625U (en) | 1982-02-15 | 1982-02-15 | Fuel tank fuel leak prevention device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58122625U JPS58122625U (en) | 1983-08-20 |
| JPH018416Y2 true JPH018416Y2 (en) | 1989-03-07 |
Family
ID=30032518
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2034882U Granted JPS58122625U (en) | 1982-02-15 | 1982-02-15 | Fuel tank fuel leak prevention device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58122625U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50116817A (en) * | 1974-02-26 | 1975-09-12 | ||
| JPS5143714B2 (en) * | 1974-03-04 | 1976-11-24 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS48108010U (en) * | 1972-03-18 | 1973-12-13 | ||
| JPS5143714U (en) * | 1974-09-27 | 1976-03-31 |
-
1982
- 1982-02-15 JP JP2034882U patent/JPS58122625U/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50116817A (en) * | 1974-02-26 | 1975-09-12 | ||
| JPS5143714B2 (en) * | 1974-03-04 | 1976-11-24 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58122625U (en) | 1983-08-20 |
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