JPH11324840A - Antistatic device - Google Patents
Antistatic deviceInfo
- Publication number
- JPH11324840A JPH11324840A JP13542698A JP13542698A JPH11324840A JP H11324840 A JPH11324840 A JP H11324840A JP 13542698 A JP13542698 A JP 13542698A JP 13542698 A JP13542698 A JP 13542698A JP H11324840 A JPH11324840 A JP H11324840A
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- hose
- pipe
- discharge side
- discharge
- 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.)
- Granted
Links
Landscapes
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、燃料タンクよりエ
ンジンに燃料を供給する燃料供給系に設けられる帯電防
止装置に関する。The present invention relates to an antistatic device provided in a fuel supply system for supplying fuel from a fuel tank to an engine.
【0002】[0002]
【従来の技術】車両の燃料供給系は燃料タンクの燃料を
タンク内のフィルタを介しポンプで吸引し、同ポンプで
加圧された燃料を吐出側ホース、車体側に支持される高
圧配管を介しエンジンに供給する。このエンジンで消費
された燃料の残り分は低圧の戻し管、低圧ホースを経て
燃料タンクに戻されている。ここで燃料タンクにはタン
ク内外を連通させる吐出側の湾曲管及び戻し側の湾曲管
が設けられ、各湾曲管には吐出側ホース及び戻しホース
を介し車体側の高圧配管及び低圧配管が連結される。こ
の吐出側ホース及び戻しホースは車体側に固定される高
圧配管及び低圧配管と燃料タンク側との相対的な位置ず
れや相対変動等をホースの可撓性を利用して吸収するよ
うに装備されており、これらのホースは、通常、燃料タ
ンクの上壁と車体側の後部フロアとに挾まれた隙間に配
備されている。2. Description of the Related Art A fuel supply system of a vehicle sucks fuel in a fuel tank by a pump through a filter in the tank, and pressurizes the fuel by a pump through a discharge side hose and a high-pressure pipe supported on the vehicle body side. Supply to the engine. The remainder of the fuel consumed by this engine is returned to the fuel tank via a low-pressure return pipe and low-pressure hose. Here, the fuel tank is provided with a discharge-side curved pipe and a return-side curved pipe for communicating between the inside and the outside of the tank, and a high-pressure pipe and a low-pressure pipe on the vehicle body side are connected to each curved pipe via a discharge-side hose and a return hose. You. The discharge side hose and the return hose are equipped so as to absorb the relative displacement and relative fluctuation between the high pressure pipe and the low pressure pipe fixed to the vehicle body side and the fuel tank side by utilizing the flexibility of the hose. These hoses are usually arranged in a gap between the upper wall of the fuel tank and the rear floor on the vehicle body side.
【0003】ところで、燃料タンク内にはポンプユニッ
トが内装され、同ユニットの燃料ポンプが駆動されると
燃料をフィルタを介し吸入し、吐出側ホース側に吐出す
る。このとき、これらの燃料路構成部材が樹脂製である
と、燃料主成分の炭化水素パラフィンと燃料路構成部材
との間の摩擦により炭化水素分子より電子の剥離が生
じ、その結果燃料は正に帯電され、燃料路構成部材は負
に帯電されることとなる。例えば、吐出側ホースが非導
電性であると吐出側ホース内を燃料が通過することによ
り吐出側ホースの全域が負に帯電される。しかも、燃料
タンク内に配備される燃料路構成部材である燃料フィル
タもこれを燃料が通過することにより帯電し、ここで生
じた静電気もポンプモジュールの上端のパイプジョイン
トやこれに連結される吐出側ホースに帯電する。[0003] A pump unit is provided in the fuel tank, and when the fuel pump of the unit is driven, fuel is sucked in through a filter and discharged to a discharge side hose. At this time, if these fuel path constituent members are made of resin, the friction between the fuel main component hydrocarbon paraffin and the fuel path constituent members causes the separation of electrons from the hydrocarbon molecules, and as a result, the fuel becomes exactly As a result, the fuel path member is negatively charged. For example, when the discharge side hose is non-conductive, the whole area of the discharge side hose is negatively charged by fuel passing through the inside of the discharge side hose. In addition, the fuel filter, which is a fuel path constituent member provided in the fuel tank, is charged by the passage of the fuel, and the generated static electricity is also discharged by the pipe joint at the upper end of the pump module and the discharge side connected thereto. Hose is charged.
【0004】このように吐出側ホースが帯電すると、そ
の時の空気の絶縁性が低い場合には吐出側ホースの帯電
量が比較的小さい状態で微弱な放電が起って吐出側ホー
スの静電気が除電されるので過度な帯電は生じにくい。When the discharge hose is charged in this way, if the air insulation at that time is low, a weak discharge occurs in a state where the charge amount of the discharge hose is relatively small, and the static electricity of the discharge hose is eliminated. Therefore, excessive charging is unlikely to occur.
【0005】[0005]
【発明が解決しようとする課題】ところが、空気が極め
て乾燥した状態にあると空気の絶縁性が高まり、吐出側
ホースの静電気が空気中に放電することがなくなり、静
電気がいずこからも除電されない状態が続くと、吐出側
ホースの帯電量は燃料流動の経過に応じて順次増加す
る。やがて、吐出側ホースの周辺部品との間の絶縁性を
越えるまでに過度に帯電されると、吐出側ホースと周辺
部品側との間でよりエネルギの大きな放電が生じ、吐出
側ホースの放電個所は樹脂劣化を生じ、耐久性が低下す
るという問題が生じる。However, when the air is extremely dry, the insulating properties of the air are increased, and the discharge side hose does not discharge static electricity into the air, and the static electricity cannot be removed from anywhere. When the state continues, the charge amount of the discharge side hose increases sequentially as the fuel flows. Eventually, if the discharge hose is excessively charged until it exceeds the insulating property between the discharge hose and the peripheral parts, a discharge with greater energy is generated between the discharge hose and the peripheral parts, and the discharge point of the discharge hose is discharged. Causes a problem that the resin deteriorates and the durability decreases.
【0006】なお、吐出側ホースの複数個所を車体側の
導電性のホース支持部に連結するようにしておけば、吐
出側ホースの各連結個所との対向部やその近傍部位の静
電気が導電性のホース支持部より車体側に拡散消去さ
れ、吐出側ホース全域の過度な帯電は防止され、比較
的、吐出側ホースと車体基部側との間の放電を低減でき
る。しかし、ホース支持部となる、例えば、燃料タンク
が樹脂製であると、吐出側ホース上に生じた静電気はい
ずこからも除電されず、空気がきわめて乾燥した状態に
あるとすると、吐出側ホースと後部フロア等の周辺部品
との間での放電が特に生じ易くなり、これにより吐出側
ホースの耐久性が低下するという問題が生じる。If a plurality of locations on the discharge hose are connected to the conductive hose support on the vehicle body side, the static electricity at the portion facing the connecting portions of the discharge hose and at the vicinity thereof is conductive. The hose is diffused and erased from the hose support to the vehicle body side, and excessive charging of the entire discharge side hose is prevented, and the discharge between the discharge side hose and the vehicle body base side can be relatively reduced. However, if the fuel tank serving as a hose support portion is made of a resin, for example, static electricity generated on the discharge side hose is not eliminated from anywhere, and if the air is extremely dry, the discharge side hose may be used. In particular, the discharge between the discharge hose and the peripheral parts such as the rear floor tends to occur, which causes a problem that the durability of the discharge side hose is reduced.
【0007】本発明の目的は、吐出側ホースとその周辺
部品との間での放電を防止し、吐出側ホースの耐久性を
向上させることのできる帯電防止装置を提供することに
ある。An object of the present invention is to provide an antistatic device capable of preventing discharge between a discharge side hose and its peripheral parts and improving durability of the discharge side hose.
【0008】[0008]
【課題を解決するための手段】上述の目的を達成するた
めに、請求項1の発明では、吐出側ホースの樹脂製の管
部を導電性樹脂または導電性ゴムから成る表皮管部で被
覆し、この表皮管部と導電性の戻し管とを連結手段によ
り導電性を保って結合するので、燃料タンクからの高圧
燃料を吐出側ホースを介しエンジン側に供給する際に管
部の全域に生じた静電気を全て導電性の表皮管部より導
電性の戻し管に導き、この戻し管を通し導電性の燃料配
管よりエンジン等に導き除電できる。このため、吐出側
ホースの静電気がその周辺部品へ直接放電することによ
る吐出側ホースの劣化を防止し、耐久性を向上できる。
更に、吐出側ホースと戻し管とを連結手段により導電性
を保って結合するという容易な作業だけで、管部上に生
じた静電気を全て除電でき、組付け作業コストの低減を
も図れる。In order to achieve the above object, according to the first aspect of the present invention, a resin tube portion of a discharge side hose is covered with a skin tube portion made of conductive resin or conductive rubber. Since the skin tube portion and the conductive return tube are connected to each other while maintaining conductivity by the connecting means, when high-pressure fuel from the fuel tank is supplied to the engine side via the discharge side hose, the entire surface of the tube portion is generated. All of the generated static electricity is led from the conductive skin tube portion to the conductive return pipe, and through this return pipe, it is guided to the engine and the like from the conductive fuel pipe to eliminate static electricity. For this reason, it is possible to prevent the discharge side hose from deteriorating due to the discharge of the static electricity of the discharge side hose directly to peripheral components, and to improve the durability.
Furthermore, all the static electricity generated on the pipe portion can be eliminated by only an easy operation of connecting the discharge side hose and the return pipe while maintaining the conductivity by the connecting means, and the assembly operation cost can be reduced.
【0009】好ましくは、管部が多層ナイロンチューブ
で、表皮管部が導電性のソリッドゴムで成形されている
ものが良く、この場合、管部が多層ナイロンチューブの
ため吐出側ホースの耐圧性、耐浸透性を有することより
高圧燃料配管としての耐久性を充分に確保でき、しか
も、可撓性を有するため、燃料タンクと車体等に固定さ
れる燃料配管との相対的な位置ずれを吸収でき、配管結
合作業を容易化できる。また、吐出側ホースと戻し管と
を連結手段により互いに直接接合させても良い。この場
合、連結手段により吐出側ホースと戻し管とを互いに直
接接合するのみで両者を導電性を保って結合でき、配管
結合作業を容易化でき、ここで用いる連結手段も簡素化
でき、コスト低減を図れる。Preferably, the tube portion is a multilayer nylon tube, and the skin tube portion is formed of conductive solid rubber. In this case, since the tube portion is a multilayer nylon tube, the discharge side hose has pressure resistance, Due to the penetration resistance, sufficient durability as a high-pressure fuel pipe can be ensured, and since it has flexibility, the relative displacement between the fuel tank and the fuel pipe fixed to the vehicle body or the like can be absorbed. , Pipe connection work can be facilitated. Further, the discharge side hose and the return pipe may be directly joined to each other by the connecting means. In this case, the discharge side hose and the return pipe can be joined while maintaining conductivity only by directly joining the discharge side hose and the return pipe to each other by the connecting means, so that the pipe connecting work can be simplified, the connecting means used here can be simplified, and the cost can be reduced. Can be achieved.
【0010】[0010]
【発明の実施の形態】図1及び図2には本発明の適用さ
れた帯電防止装置を示した。この帯電防止装置は自動車
の燃料タンク1と図示しない車体前部のエンジン2との
間に配備される燃料供給系Aに装着される。この燃料供
給系Aは燃料タンク1の燃料を同タンク内の燃料ポンプ
3に吸込、高圧化して吐出側ホース4、高圧配管5を経
てエンジン2側に供給し、エンジン2側の燃料噴射系6
で消費されなかった残留燃料を戻し管である低圧配管
7、戻しホース8を通し燃料タンク1に戻す。1 and 2 show an antistatic device to which the present invention is applied. This antistatic device is mounted on a fuel supply system A provided between a fuel tank 1 of an automobile and an engine 2 at a front portion of a vehicle body (not shown). The fuel supply system A draws the fuel in the fuel tank 1 into a fuel pump 3 in the tank, increases the pressure, supplies it to the engine 2 via a discharge hose 4 and a high-pressure pipe 5, and supplies the fuel to the fuel injection system 6 on the engine 2.
The remaining fuel not consumed in the above is returned to the fuel tank 1 through the low pressure pipe 7 and the return hose 8 which are return pipes.
【0011】燃料タンク1は車体後部の左右フレーム
9,9及び前リヤフロアクロスメンバ10と後リヤフロ
アクロスメンバ11間に張設されるリヤフロア12の下
部に配備され、前後に長く互いに並設される2本の金属
ベルト13を介し前リヤフロアクロスメンバ10と後リ
ヤフロアクロスメンバ11に締め付け支持される。この
燃料タンク1は平坦な底壁101とリヤフロア12との
干渉を避けるような形状の上壁102とを有した略矩形
の密閉容器として樹脂成形されている。この燃料タンク
1の上壁102の略中央にはポンプモジュール14が一
体的に装着される。The fuel tank 1 is disposed below the left and right frames 9, 9 at the rear of the vehicle body and the rear floor 12 stretched between the front rear floor cross member 10 and the rear rear floor cross member 11, and is long and juxtaposed longitudinally. It is fastened and supported by the front rear cross member 10 and the rear rear cross member 11 via the metal belt 13. This fuel tank 1 is resin-molded as a substantially rectangular hermetic container having a flat bottom wall 101 and an upper wall 102 shaped to avoid interference with the rear floor 12. At substantially the center of the upper wall 102 of the fuel tank 1, a pump module 14 is integrally mounted.
【0012】このポンプモジュール14は燃料タンク1
内に配されるケーシング141と、ケーシング141と
共に樹脂成型される蓋部142と、ケーシング141に
支持される燃料フィルタ15、同フィルタを介し燃料を
吸入する燃料ポンプ3、ケーシング141に支持される
レベルゲージ16、蓋部142に一体結合され同蓋部を
貫通して燃料ポンプ3からの燃料を外部に導く湾曲高圧
パイプ17、蓋部142に一体結合され同蓋部を貫通し
て低圧燃料をタンク内に導く湾曲低圧パイプ18、蓋部
142に一体結合され同蓋部を貫通して燃料ポンプ3の
図示しないモータに駆動電流を導くモータ用配線及びレ
ベルゲージ16の配線を共に収容するソケット19を備
える。The pump module 14 is used for the fuel tank 1
A casing 141 disposed therein, a lid 142 molded of resin with the casing 141, a fuel filter 15 supported by the casing 141, a fuel pump 3 for sucking fuel through the filter, and a level supported by the casing 141. A curved high-pressure pipe 17, which is integrally connected to the gauge 16 and the lid 142 and penetrates the lid to guide the fuel from the fuel pump 3 to the outside. A low-pressure fuel is integrally connected to the lid 142 and penetrates the lid. And a socket 19 that is integrally connected to the lid portion 142 and penetrates through the lid portion to penetrate the lid portion and accommodates both the motor wiring for guiding the drive current to the motor (not shown) of the fuel pump 3 and the wiring of the level gauge 16. Prepare.
【0013】蓋部142は上壁102に形成される図示
しない孔を密閉するような形状に形成され、図示しない
シール部材を挾んで上壁102にボルト止めされる。The lid 142 is formed in a shape to seal a hole (not shown) formed in the upper wall 102, and is bolted to the upper wall 102 with a sealing member (not shown) therebetween.
【0014】燃料ポンプ3は円周流ポンプであり図示し
ないモータにより駆動され、燃料フィルタ15を介し吸
入した燃料を湾曲高圧パイプ17側に導く。燃料フィル
タは燃料タンク1中の燃料を樹脂製の濾過部材で濾過し
燃料ポンプ3側に供給する。燃料ポンプ3の図示しない
吐出口に連通する湾曲高圧パイプ17は、その先端に吐
出側ホース4を連結する。湾曲高圧パイプ17と共に蓋
部142に並設される湾曲低圧パイプ18は、その先端
に戻しホース8を連結する。The fuel pump 3 is a circumferential pump and is driven by a motor (not shown) to guide the fuel sucked through the fuel filter 15 to the curved high-pressure pipe 17. The fuel filter filters the fuel in the fuel tank 1 with a filter member made of resin and supplies the filtered fuel to the fuel pump 3. A curved high-pressure pipe 17 communicating with a discharge port (not shown) of the fuel pump 3 has a distal end connected to the discharge side hose 4. The curved low-pressure pipe 18 arranged in parallel with the curved high-pressure pipe 17 on the lid 142 returns the end thereof to the hose 8.
【0015】図3に示すように、吐出側ホース4は樹脂
製の管部21と同管部を被覆する導電性樹脂で成形され
た表皮管部22とで形成される。ここでの管部21は耐
圧性を確保すべくナイロン樹脂で成形される。しかも、
樹脂製チューブの燃料透過性を考慮し、多層化され(図
示せず)ており、これにより燃料の分子間透過を防止す
るように構成されている。管部21を被覆する表皮管部
22は導電性素材の混入されたソリッドゴム(EPDM
等)で成形される。この表皮管部22は管部21の表面
部の全域を導電性に保持するためのもので、比較的薄く
成形されている。なお、表皮管部22はソリッドゴム以
外の導電性樹脂で成形されても良い。As shown in FIG. 3, the discharge side hose 4 is formed of a resin tube portion 21 and a skin tube portion 22 formed of a conductive resin and covering the tube portion. The tube portion 21 here is formed of nylon resin in order to ensure pressure resistance. Moreover,
Considering the fuel permeability of the resin tube, the resin tube is multi-layered (not shown), and is configured to prevent intermolecular permeation of fuel. The skin tube portion 22 covering the tube portion 21 is made of solid rubber (EPDM) mixed with a conductive material.
Etc.). The skin tube portion 22 is for keeping the entire surface of the tube portion 21 conductive, and is formed to be relatively thin. The skin tube portion 22 may be formed of a conductive resin other than solid rubber.
【0016】吐出側ホース4の一端にはパイプジョイン
ト201及びこれに係合する筒状ナット20が連結さ
れ、同ナット20は湾曲高圧パイプ17の先端の図示し
ないねじ部に螺着され、両者は連通状態に保持される。
湾曲高圧パイプ17の他端は、図4に示すように、樹脂
ソケット23を介し車体側に固定支持されている金属製
の高圧配管5に連結される。この樹脂ソケット23の本
体231は樹脂(PP等)等で一体成形され、その本体
231の長手方向に通路232が貫通し、同通路の一方
の内壁には表皮管部22を排除した管部21が圧入さ
れ、他方には嵌合孔233が形成される。この嵌合孔2
33はその最奥部に拡径部234を形成され、樹脂ソケ
ット23を高圧配管5に押し込むことにより、相対的に
拡径部234まで高圧配管5の環状膨出部501を押し
込み嵌挿した際に両者を離脱不可状態に結合できる。な
お、符号24はシール部材を示す。A pipe joint 201 and a cylindrical nut 20 engaged with the pipe joint 201 are connected to one end of the discharge side hose 4, and the nut 20 is screwed to a threaded portion (not shown) at the tip of the curved high pressure pipe 17. The communication state is maintained.
The other end of the curved high-pressure pipe 17 is connected to a metal high-pressure pipe 5 fixedly supported on the vehicle body via a resin socket 23 as shown in FIG. A main body 231 of the resin socket 23 is integrally formed of resin (PP or the like), and a passage 232 penetrates in a longitudinal direction of the main body 231. Is press-fitted, and a fitting hole 233 is formed in the other. This fitting hole 2
Reference numeral 33 denotes an enlarged diameter portion 234 formed at the innermost portion. When the resin socket 23 is pushed into the high-pressure pipe 5, the annular bulging portion 501 of the high-pressure pipe 5 is relatively pushed to the enlarged diameter portion 234. Can be combined in a non-separable state. Reference numeral 24 indicates a seal member.
【0017】このように吐出側ホース4は耐圧性、耐浸
透性を有することより高圧燃料配管としての耐久性を充
分に確保でき、しかも、可撓性を有するため、燃料タン
ク1と車体側に固定支持される高圧配管5との相対的な
位置ずれを吸収でき、配管結合作業を容易化できる。湾
曲低圧パイプ18と低圧配管7を連通させる戻しホース
8は比較的耐圧性が低くて良く、図3に示すように、こ
こでは導電性素材の混入されたソリッドゴム(EPDM
等)のみで成形される。この戻しホース8の一端と湾曲
低圧パイプ18及び戻しホース8の他端と低圧配管7と
はそれぞれ差し込み結合され、同結合部の外周には、図
5に示すように、略Ω字型の締め付け金具25を巻き掛
け、同金具の両端部をボルト26で締め付け結合してい
る。As described above, the discharge side hose 4 has pressure resistance and permeation resistance so that the durability as a high-pressure fuel pipe can be sufficiently ensured. In addition, since the discharge side hose 4 has flexibility, the discharge side hose 4 is connected to the fuel tank 1 and the vehicle body side. The relative displacement with respect to the fixedly supported high-pressure pipe 5 can be absorbed, and the pipe connection work can be facilitated. The return hose 8 that connects the curved low-pressure pipe 18 and the low-pressure pipe 7 may have relatively low pressure resistance. As shown in FIG. 3, here, solid rubber (EPDM) mixed with a conductive material is used.
Etc.) only. One end of this return hose 8 and the curved low-pressure pipe 18 and the other end of the return hose 8 and the low-pressure pipe 7 are respectively inserted and connected, and the outer periphery of the connection is, as shown in FIG. The metal fitting 25 is wound around, and both ends of the metal fitting are fastened and connected by bolts 26.
【0018】ここで、図1に示すように、互いに並設さ
れた吐出側ホース4及び戻しホース8は共に可撓性を有
し、湾曲変形された上で燃料タンク1側の両折曲パイプ
16,17と車体側の両配管5,7をそれぞれ連通さ
せ、しかも、両者の中間部は、連結手段としてのケーブ
ルバンド27により互いに直接接合するように変形さ
れ、その状態で互いに連結される。なお、ケーブルバン
ド27は可撓性の樹脂成形バンドであり、図3に示すよ
うに、一端の係合環部271に設けた孔272に他端の
ベルト部273を嵌挿し、ベルト部273に連続形成さ
れる係止突起274を係合環部271内の可変爪275
に係止することによって、環状を成すベルト部273に
巻き付けた吐出側ホース4と戻しホース8を互いに直接
接合状態に保持できる。なお、このようなケーブルバン
ド27による吐出側ホース4と戻しホース8の連結作業
は極めて容易に行うことができる。As shown in FIG. 1, the discharge hose 4 and the return hose 8 which are arranged side by side have flexibility, are both bent and deformed, and are both bent pipes on the fuel tank 1 side. The pipes 16 and 17 and the two pipes 5 and 7 on the vehicle body side are communicated with each other, and an intermediate portion between them is deformed so as to be directly joined to each other by a cable band 27 as a connecting means and is connected to each other in that state. The cable band 27 is a flexible resin molded band. As shown in FIG. 3, the belt 273 at the other end is inserted into a hole 272 provided in the engagement ring 271 at one end, and the belt 273 is inserted into the belt 273. The continuously formed locking projection 274 is connected to the variable claw 275 in the engagement ring 271.
, The discharge side hose 4 and the return hose 8 wound around the annular belt portion 273 can be directly joined to each other. The connection work of the discharge side hose 4 and the return hose 8 by such a cable band 27 can be performed very easily.
【0019】この場合、吐出側ホース4の表皮管部22
と戻しホース8は共に導電性のため、両者は導電性を保
って結合され、しかも、戻しホース8は金属製の低圧配
管7と直接結合され、低圧配管7は車体基部及びエンジ
ン2側に結合されている。このため、表皮管部22と戻
しホース8の中間部を直接接合することにより、吐出側
ホース4の表皮管部22全域はエンジン側に導電性を保
って連結された状態を保持できる。このような図1の帯
電防止装置を装備した図示しない車両が空気が極めて乾
燥した状態下で長時間走行し、この間燃料タンク1の燃
料が燃料供給系Aによりエンジン2側に順次供給される
とする。In this case, the skin tube portion 22 of the discharge side hose 4
Since both the return hose 8 and the return hose 8 are conductive, they are connected while maintaining conductivity. In addition, the return hose 8 is directly connected to the metal low-pressure pipe 7, and the low-pressure pipe 7 is connected to the vehicle body base and the engine 2 side. Have been. Therefore, by directly joining the skin tube portion 22 and the intermediate portion of the return hose 8, the entire skin tube portion 22 of the discharge side hose 4 can be kept electrically connected to the engine side. A vehicle (not shown) equipped with such an antistatic device of FIG. 1 travels for a long time in a state where the air is extremely dry. During this time, the fuel in the fuel tank 1 is sequentially supplied to the engine 2 by the fuel supply system A. I do.
【0020】この際、燃料タンク1の燃料が燃料フィル
タ15を通過し燃料ポンプ3に吸込まれ、高圧化して吐
出側ホース4、高圧配管5を経てエンジン2側に供給さ
れる。すると、燃料路構成部材である樹脂製の燃料フィ
ルタ15及び吐出側ホース4を燃料が通過することによ
り、主成分の炭化水素パラフィンとの間の摩擦により炭
化水素分子より電子の剥離が生じ、燃料は正に帯電さ
れ、燃料フィルタ15及び吐出側ホース4が負に帯電さ
れる。この吐出側ホース4の全域に生じた静電気及び燃
料フィルタ15より湾曲高圧パイプ17を経て吐出側ホ
ース4の端部に達した静電気は、導電性の表皮管部22
より戻しホース8、低圧配管7、車体基部及びエンジン
2側に分散消去され、吐出側ホース4の帯電量をほとん
どゼロに保持できる。At this time, the fuel in the fuel tank 1 passes through the fuel filter 15, is sucked into the fuel pump 3, is increased in pressure, and is supplied to the engine 2 through the discharge hose 4 and the high-pressure pipe 5. Then, when the fuel passes through the fuel filter 15 made of resin and the discharge side hose 4 which are the fuel path constituent members, the friction between the fuel and the main component hydrocarbon paraffin causes the separation of the electrons from the hydrocarbon molecules and the fuel. Is positively charged, and the fuel filter 15 and the discharge side hose 4 are negatively charged. The static electricity generated in the entire area of the discharge side hose 4 and the static electricity reaching the end of the discharge side hose 4 from the fuel filter 15 through the curved high pressure pipe 17 are transferred to the conductive skin tube section 22.
The return hose 8, the low-pressure pipe 7, the vehicle body base and the engine 2 are dispersed and erased, so that the charge amount of the discharge side hose 4 can be kept almost zero.
【0021】このように、図1の帯電防止装置によれ
ば、吐出側ホース4の静電気が後部フロア等の周辺部品
へ直接放電することによる吐出側ホース4の放電部位の
劣化を確実に防止できる。更に、吐出側ホース4と戻し
ホース8とを導電性を保って結合するという容易な作業
だけで、吐出側ホース4のほぼ全域に生じた静電気を除
電でき、組付け作業コストの低減を図れる。ここでの管
部21は多層ナイロンチューブで、表皮管部22が導電
性のソリッドゴムで成形されるので、高圧燃料配管とし
ての耐久性を充分に確保でき、しかも、可撓性を有する
ため、燃料タンクと車体側に支持される固定燃料配管と
の相対的な位置ずれを吸収でき、この点でも配管結合作
業を容易化できる。As described above, according to the antistatic device of FIG. 1, deterioration of the discharge portion of the discharge side hose 4 due to discharge of static electricity of the discharge side hose 4 directly to peripheral parts such as the rear floor can be reliably prevented. . Furthermore, static electricity generated in almost the entire area of the discharge side hose 4 can be eliminated by only an easy operation of connecting the discharge side hose 4 and the return hose 8 while maintaining conductivity, thereby reducing the assembly work cost. Since the tube portion 21 is a multilayer nylon tube and the skin tube portion 22 is formed of conductive solid rubber, the durability as a high-pressure fuel pipe can be sufficiently ensured, and since it has flexibility, The relative displacement between the fuel tank and the fixed fuel pipe supported on the vehicle body side can be absorbed, and also in this respect, the pipe connection work can be facilitated.
【0022】上述のところにおいて、吐出側ホース4と
戻しホース8とは連結手段としてのケーブルバンド27
により互いに直接接合され、導電性を保っていたが、こ
れに代え、図6に示すように帯電防止装置を構成しても
良い。この場合、吐出側ホース4と戻しホース8とは全
域にわたり所定間隔を保って並列状に配備され、両者間
を金属製の上下一対の連結金具28で挾み、互いをボル
ト29で締め付け結合するように構成される。この場合
も吐出側ホース4の表皮管部22と戻しホース8は導電
性を保って結合され、図1の帯電防止装置と同様の作用
効果が得られ、特に、吐出側ホース4と戻しホース8と
を連結金具28とボルト29で締め付けるのでより信頼
性のある連結状態を保持できる。In the above, the discharge side hose 4 and the return hose 8 are connected to the cable band 27 as a connecting means.
Are connected directly to each other to maintain the conductivity. Alternatively, an antistatic device may be configured as shown in FIG. In this case, the discharge side hose 4 and the return hose 8 are arranged in parallel at a predetermined interval over the entire area, are sandwiched between a pair of upper and lower metal fittings 28 made of metal, and fastened to each other by bolts 29. It is configured as follows. Also in this case, the skin tube portion 22 of the discharge side hose 4 and the return hose 8 are connected while maintaining conductivity, and the same operation and effect as the antistatic device of FIG. 1 can be obtained. In particular, the discharge side hose 4 and the return hose 8 Are tightened by the connection fitting 28 and the bolt 29, so that a more reliable connection state can be maintained.
【0023】上述のところにおいて、燃料タンク1は樹
脂成形されていたが、板金製であってもよく、この場合
も吐出側ホース4の全域の静電気がより確実にエンジン
2等の車体側に除電される。上述のところにおいて、湾
曲低圧パイプ18と低圧配管7を連通させる戻しホース
8は導電性のソリッドゴムで成形されていたが、場合に
より、図7に示すように、吐出側ホース4の中間部との
対向位置まで、車体側に固定支持された低圧配管7を延
長配備し、吐出側ホース4の中間部と低圧配管7をケー
ブルバンド27により互いに直接接合しても良い。な
お、低圧配管7の先端と湾曲低圧パイプ17との間は比
較的短い戻しホース8’で結合することとなる。この場
合も、図1の帯電防止装置と同様の作用効果が得られ、
特に、戻しホース8’は絶縁性であっても良い。In the above description, the fuel tank 1 is made of resin. However, the fuel tank 1 may be made of sheet metal. Also in this case, static electricity in the entire area of the discharge side hose 4 is more reliably discharged to the vehicle body such as the engine 2. Is done. In the above description, the return hose 8 that connects the curved low-pressure pipe 18 and the low-pressure pipe 7 is formed of conductive solid rubber. However, in some cases, as shown in FIG. , The low pressure pipe 7 fixedly supported on the vehicle body side may be extended and provided, and the middle part of the discharge side hose 4 and the low pressure pipe 7 may be directly joined to each other by the cable band 27. The distal end of the low-pressure pipe 7 and the curved low-pressure pipe 17 are connected by a relatively short return hose 8 '. In this case, the same operation and effect as those of the antistatic device of FIG. 1 can be obtained.
In particular, the return hose 8 'may be insulating.
【0024】上述のところにおいて、連結手段としてケ
ーブルバンド27、連結金具28を説明したが、吐出側
ホース4と戻しホース8とを導電性を保って結合できる
その他の連結手段を用いることもでき、この場合も図1
の帯電防止装置と同様の作用効果が得られる。図1の帯
電防止装置は自動車の燃料供給系に装備されていたが、
燃料タンクとエンジンとを結ぶその他の燃料供給系に装
備されてもよく、この場合も図1の帯電防止装置と同様
の作用効果が得られる。In the above description, the cable band 27 and the connecting fitting 28 have been described as connecting means. However, other connecting means capable of connecting the discharge side hose 4 and the return hose 8 while maintaining conductivity can also be used. Also in this case, FIG.
The same operation and effect as those of the antistatic device described above can be obtained. The antistatic device of FIG. 1 was installed in the fuel supply system of an automobile,
It may be provided in another fuel supply system connecting the fuel tank and the engine. In this case, the same operation and effect as those of the antistatic device of FIG. 1 can be obtained.
【0025】[0025]
【発明の効果】以上のように、請求項1の発明によれ
ば、燃料タンクからの高圧燃料を吐出側ホースを介しエ
ンジン側に供給する際に管部の全域に生じた静電気を全
て導電性の表皮管部より導電性の戻し管に導き、この戻
し管を通し車体側に支持される導電性の燃料配管よりエ
ンジン側に導き、除電できる。このため、吐出側ホース
の静電気がその周辺部品へ直接放電することによる吐出
側ホースの放電個所の劣化を防止し、耐久性を向上でき
る。更に、吐出側ホースと戻し管とを連結手段により導
電性を保って結合するという容易な作業だけで、管部全
域に生じた静電気を全て除電でき、専用の除電部材を用
いる必要が無いので部品コスト、組付け作業工数の低減
をも図れる。As described above, according to the first aspect of the present invention, when the high-pressure fuel from the fuel tank is supplied to the engine side through the discharge side hose, all the static electricity generated in the entire pipe portion is conducted. From the skin tube portion to a conductive return pipe, and through this return pipe, to the engine side from a conductive fuel pipe supported on the vehicle body side, and the charge can be removed. For this reason, it is possible to prevent the discharge portion of the discharge side hose from deteriorating due to the discharge of the static electricity of the discharge side hose directly to peripheral components, thereby improving the durability. Furthermore, by simply connecting the discharge side hose and the return pipe with the connecting means while maintaining the conductivity, the static electricity generated in the entire pipe section can be completely eliminated, and there is no need to use a dedicated static elimination member. Cost and assembly work can be reduced.
【図1】本発明の適用された帯電防止装置を装備する車
両の燃料供給系の要部切欠平面図である。FIG. 1 is a cutaway plan view of a main part of a fuel supply system of a vehicle equipped with an antistatic device to which the present invention is applied.
【図2】図1の燃料供給系の要部切欠概略側断面図であ
る。FIG. 2 is a schematic side sectional view of a main part cutaway of the fuel supply system of FIG.
【図3】図1のIII−III線断面図である。FIG. 3 is a sectional view taken along line III-III of FIG. 1;
【図4】図1の帯電防止装置で用いる樹脂ソケットの拡
大断面図である。FIG. 4 is an enlarged sectional view of a resin socket used in the antistatic device of FIG.
【図5】図1の帯電防止装置で用いる戻しホースの端部
の切欠拡大断面図である。FIG. 5 is a cutaway enlarged sectional view of an end of a return hose used in the antistatic device of FIG. 1;
【図6】本発明の他の実施形態としての帯電防止装置の
要部切欠平面図である。FIG. 6 is a cutaway plan view of a main part of an antistatic device as another embodiment of the present invention.
【図7】本発明の他の実施形態としての帯電防止装置の
要部切欠平面図である。FIG. 7 is a cutaway plan view of a main part of an antistatic device as another embodiment of the present invention.
【符号の説明】 1 燃料タンク 2 エンジン 4 吐出側ホース 7 低圧配管(戻し管) 8 戻しホース(戻し管) 21 管部 22 表皮管部 27 ケーブルバンド 28 連結金具 A 燃料供給系[Description of Signs] 1 Fuel tank 2 Engine 4 Discharge side hose 7 Low pressure pipe (Return pipe) 8 Return hose (Return pipe) 21 Pipe section 22 Skin pipe section 27 Cable band 28 Connecting bracket A Fuel supply system
Claims (1)
る樹脂製の管部と同管部を被覆する導電性樹脂または導
電性ゴムから成る表皮管部とを有した吐出側ホースと、 上記エンジンからの戻り燃料を上記燃料タンクへ戻す導
電性の戻し管と、 上記表皮管部と上記戻し管とを導電性を保って結合する
連結手段とを具備したことを特徴とする帯電防止装置。A discharge hose having a resin tube for supplying fuel from a fuel tank to the engine and a skin tube made of conductive resin or conductive rubber for covering the tube; An antistatic device comprising: a conductive return pipe for returning fuel returned from the fuel tank to the fuel tank; and a connecting means for connecting the skin pipe portion and the return pipe while maintaining conductivity.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13542698A JP3565013B2 (en) | 1998-05-18 | 1998-05-18 | Antistatic device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13542698A JP3565013B2 (en) | 1998-05-18 | 1998-05-18 | Antistatic device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH11324840A true JPH11324840A (en) | 1999-11-26 |
JP3565013B2 JP3565013B2 (en) | 2004-09-15 |
Family
ID=15151461
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13542698A Expired - Fee Related JP3565013B2 (en) | 1998-05-18 | 1998-05-18 | Antistatic device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3565013B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2372488A (en) * | 2001-02-26 | 2002-08-28 | Honda Motor Co Ltd | Fuel pipe static discharge clamping arrangement |
US7159573B2 (en) | 2002-10-18 | 2007-01-09 | Denso Corporation | Fuel feed apparatus having conductive members grounded each other |
JP2007269319A (en) * | 2001-09-27 | 2007-10-18 | Yamaha Motor Co Ltd | Fuel hose fixing structure for motorcycle fuel injection engine |
-
1998
- 1998-05-18 JP JP13542698A patent/JP3565013B2/en not_active Expired - Fee Related
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2372488A (en) * | 2001-02-26 | 2002-08-28 | Honda Motor Co Ltd | Fuel pipe static discharge clamping arrangement |
GB2372488B (en) * | 2001-02-26 | 2004-03-17 | Honda Motor Co Ltd | Antistatic structure of fuel pipe |
US6915870B2 (en) | 2001-02-26 | 2005-07-12 | Honda Giken Kogyo Kabushiki Kaisha | Antistatic structure of fuel pipe |
JP2007269319A (en) * | 2001-09-27 | 2007-10-18 | Yamaha Motor Co Ltd | Fuel hose fixing structure for motorcycle fuel injection engine |
US7159573B2 (en) | 2002-10-18 | 2007-01-09 | Denso Corporation | Fuel feed apparatus having conductive members grounded each other |
Also Published As
Publication number | Publication date |
---|---|
JP3565013B2 (en) | 2004-09-15 |
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