JPH01134061A - Deaerator for fuel supply system - Google Patents
Deaerator for fuel supply systemInfo
- Publication number
- JPH01134061A JPH01134061A JP62290228A JP29022887A JPH01134061A JP H01134061 A JPH01134061 A JP H01134061A JP 62290228 A JP62290228 A JP 62290228A JP 29022887 A JP29022887 A JP 29022887A JP H01134061 A JPH01134061 A JP H01134061A
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- box
- valve
- reflux
- 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.)
- Pending
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 109
- 238000010992 reflux Methods 0.000 claims abstract description 43
- 239000002828 fuel tank Substances 0.000 claims abstract description 39
- 238000002347 injection Methods 0.000 claims abstract description 28
- 239000007924 injection Substances 0.000 claims abstract description 28
- 238000013022 venting Methods 0.000 claims description 4
- 230000000740 bleeding effect Effects 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 8
- 241000538562 Banjos Species 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 230000004941 influx Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
Landscapes
- Feeding And Controlling Fuel (AREA)
Abstract
Description
【発明の詳細な説明】
Ａ０発明の目的
（＋） 産業上の利用分野
本発明は、吸入行程で吸入ポートを通して一定量燃料を
吸入し、吐出行程で余剰燃料を吸入ポートへ戻す燃料噴
射ポンプの吸入ポートを、この燃料噴射ポンプより高い
位置を占める燃料タンク内に設置された燃料フィルタに
供給通路を介して連通した燃料供給系の空気抜き装置に
関する。Detailed Description of the Invention A0 Object of the Invention (+) Industrial Application Field The present invention relates to a fuel injection pump that sucks a fixed amount of fuel through an intake port during the intake stroke and returns excess fuel to the intake port during the discharge stroke. The present invention relates to an air venting device for a fuel supply system in which a suction port is communicated via a supply passage with a fuel filter installed in a fuel tank located at a higher position than the fuel injection pump.
（２）従来の技術
上記燃料供給系において、燃料噴射ポンプの吸入ポート
と燃料タンク内の上部とを、還流通路及び該吸入ポート
内の減圧時に閉じ昇圧時に開く一方向弁を介して連通し
、燃料タンクへの給油時、供給通路内の空気を還流通路
を通して燃料タンク内に排出するようにした空気抜き装
置を備えることが従来知られている。(2) Prior Art In the above fuel supply system, the suction port of the fuel injection pump and the upper part of the fuel tank are communicated through a recirculation passage and a one-way valve that closes when the pressure in the suction port is reduced and opens when the pressure increases; BACKGROUND ART It is conventionally known to include an air vent device that discharges air in a supply passage into a fuel tank through a recirculation passage when refueling a fuel tank.
（３）発明が解決しようとする問題点
しかしながら、−従来の空気排出装置では、燃料タンク
への給油時、燃料フィルタ内に空気が一旦溜ると、その
空気は排出されず、燃料噴射ポンプの作動時、燃料と共
に吸込まれてエンジンへ供給され、エンジンの運転に不
調を来たすことがある。(3) Problems to be solved by the invention However, in the conventional air evacuation device, once air accumulates in the fuel filter when refueling the fuel tank, the air is not ejected and the fuel injection pump is activated. When fuel is inhaled and supplied to the engine, it may cause engine malfunction.
本発明は、かかる点に鑑みてなされたもので、燃料タン
クへの給油時には、供給通路内の空気のみならず燃料フ
ィルタ内の空気をも燃料タンク内へ確実に排出し得るよ
うにした、燃料供給系の空気抜き装置を提供することを
目的とする。The present invention has been made in view of the above-mentioned problems, and the present invention has been made to provide a fuel tank that is capable of reliably discharging not only the air in the supply passage but also the air in the fuel filter into the fuel tank when refueling the fuel tank. The purpose of the present invention is to provide an air venting device for a supply system.
Ｂ０発明の構成
（１）問題点を解決するための手段
上記目的を達成するために、本発明は、燃ｔ４クンク内
で燃料フィルタ上方に配設される還流函と燃料フィルタ
とを排気筒を介して相互に連通し、また同還流函と燃料
噴射ポンプの吸入ポートとを、還流通路及び該吸入ポー
ト内の減圧時に閉じ昇圧時に開く一方向弁を介して連通
し、前記還流函の下部に還流函の内外と連通ずる弁函を
設けると共に、この弁函にこれを浮力で閉じ得るフロー
ト弁を収容したことを特徴とする。B0 Structure of the Invention (1) Means for Solving the Problems In order to achieve the above object, the present invention provides a recirculation box and a fuel filter disposed above the fuel filter in the fuel tank by connecting the exhaust pipe to the recirculation box and the fuel filter. The reflux box and the suction port of the fuel injection pump are communicated with each other through a reflux passage and a one-way valve that closes when the pressure in the suction port is reduced and opens when the pressure increases. The present invention is characterized in that a valve box is provided which communicates with the inside and outside of the reflux box, and a float valve that can be closed by buoyancy is housed in the valve box.
（２）作 用
燃料タンクに給油が行われると、燃料フィルタで濾過さ
れた燃料は、供給通路を流下して燃料噴射ポンプの吸入
ポートに流入し、その際、供給通路内の空気は上記燃料
に押されて一方向弁を開きながら還流通路を経て還流函
へ移り、そして開き状態のフロート弁を収容した弁函を
通って燃料タンク内に排出される。(2) Effect When the fuel tank is refueled, the fuel filtered by the fuel filter flows down the supply passage and flows into the suction port of the fuel injection pump, and at this time, the air in the supply passage is filled with the fuel. The fuel flows through the reflux passage to the reflux box while opening the one-way valve, and is discharged into the fuel tank through the valve casing containing the open float valve.
また燃料フィルタ内に溜まっていた空気も、排気筒を経
て還流函へ移り、上記と同様に燃料タンク内に排出され
る。Furthermore, the air accumulated in the fuel filter also moves to the recirculation box via the exhaust pipe and is discharged into the fuel tank in the same manner as above.
燃料タンク内の燃料油面上昇により、フロート弁が油中
に没すると浮力で弁函を閉じるので、それ以上油面が上
昇しても、未濾過燃料が還流函及び排気筒を経て燃料フ
ィルタ内に流入するようなことはない。As the fuel oil level in the fuel tank rises, the float valve sinks into the oil and closes the valve case due to buoyancy, so even if the oil level rises further, unfiltered fuel will flow through the reflux box and exhaust pipe into the fuel filter. There is no such thing as an influx.
燃料噴射ポンプが作動すると、その吸入行程時には吸入
ポートの減圧により一方向弁が閉じられるので、供給通
路から一定量の燃料を吸入し、また吐出行程での余剰燃
料の戻し時には吸入ポートの昇圧により一方向弁が開か
れるので、余剰燃料は主として還流通路を経て還流函へ
送られる。それに伴い還流面内の圧力が上昇すればフロ
ート弁が開いて還流函から燃料が排出される。When the fuel injection pump operates, during the suction stroke, the one-way valve is closed by reducing the pressure at the suction port, so a certain amount of fuel is sucked in from the supply passage, and when excess fuel is returned during the discharge stroke, the pressure at the suction port is increased. Since the one-way valve is opened, excess fuel is mainly sent to the reflux box via the reflux passage. When the pressure within the reflux surface increases accordingly, the float valve opens and fuel is discharged from the reflux box.
（３）実施例
以下、図面により本発明の一実施例について説明すると
、■はディーゼルエンジン（図示せず）用の燃料タンク
であり、その内部に配設される燃料フィルタ２は、上下
一対の端板３．４と、周壁に多数の透孔５，５・・・を
有して両端板３．４間を連結する円筒コア６と、この円
筒コア６を囲繞し７て両端板３．４に両端を結着される
エレメント７とから構成される。そして、下部端板４は
、燃料タンク１の底壁に開口する取付孔８に嵌合される
と共に、該底壁とそれに結合される接続ユニット９との
間にシール部材１０を介して挟持される。(3) Example Hereinafter, an example of the present invention will be described with reference to the drawings. 3 is a fuel tank for a diesel engine (not shown), and the fuel filter 2 disposed inside the tank has a pair of upper and lower parts. An end plate 3.4, a cylindrical core 6 having a large number of through holes 5, 5, . 4, and an element 7 whose both ends are tied to the element 7. The lower end plate 4 is fitted into a mounting hole 8 opening in the bottom wall of the fuel tank 1, and is held between the bottom wall and a connection unit 9 coupled thereto via a seal member 10. Ru.
こうして燃料フィルタ２は燃料タンク１に取付けられる
。The fuel filter 2 is thus attached to the fuel tank 1.
上部端板３には、円筒コア６と連通ずる排気筒１１が該
端板３のと方へ起立するように連設され、さらに排気筒
１１の上端には漏斗状の受皿１２が連設され、これら排
気筒ＩＩ及び受皿１２間は小孔１３を介して連通される
。An exhaust pipe 11 communicating with the cylindrical core 6 is connected to the upper end plate 3 so as to stand up toward the end plate 3, and a funnel-shaped saucer 12 is connected to the upper end of the exhaust pipe 11. , these exhaust pipe II and the saucer 12 are communicated through a small hole 13.
上記受皿１２は、燃料タンクｌ内で燃料フィルタ２の上
方に配置される還流函１４に収容される。The saucer 12 is accommodated in a recirculation box 14 disposed above the fuel filter 2 within the fuel tank 1.
還流函１４は、下面を開放した円筒状の函体１５と、こ
の函体１５の開放面を閉塞すべく排気筒１１にフ・−ｔ
ンジ状に突設された底板１６とから構成される。函体１
５は、その北壁から１７字状に突出して燃料タンクｌの
側壁を貫通する導入管１７を一体に備えており、この導
入管１７の途中に形成されたフランジ１８を燃料タンク
１の側壁にねじ止めすることにより還流函１４は燃料タ
ンク１に固定される。導入管１７の還流函１４への開口
部は前記受皿１２の直上に配置される。The reflux box 14 consists of a cylindrical box 15 with an open bottom surface, and a flap attached to the exhaust pipe 11 to close the open surface of the box 15.
It is composed of a bottom plate 16 projecting in the shape of a wedge. Box 1
5 is integrally equipped with an introduction pipe 17 that protrudes from its north wall in a 17-shape and penetrates the side wall of the fuel tank 1, and a flange 18 formed in the middle of this introduction pipe 17 is attached to the side wall of the fuel tank 1. The reflux box 14 is fixed to the fuel tank 1 by screwing. The opening of the inlet pipe 17 to the reflux box 14 is arranged directly above the saucer 12.
還流函１４の底板Ｉ６には、還流函１４の内夕（を連通
ずる弁函１９が連設され、この弁函１９にその上部の弁
座２０と協働するフロート弁２１が収容される。フロー
ト弁２Ｉは通常は開き位置を保ち、周囲の燃料から浮力
を受けると閉じるようになっている。A valve box 19 that communicates with the inner and outer parts of the reflux box 14 is connected to the bottom plate I6 of the reflux box 14, and a float valve 21 that cooperates with a valve seat 20 on the upper part of the reflux box 19 is housed in the valve box 19. The float valve 2I normally maintains an open position and closes when it receives buoyancy from surrounding fuel.
前記接続ユニット９は、燃料フィルタ２の下部端板４の
出口２２と連通ずる接続管２３を有し、この接続管２３
及び前記導入管１７に供給通路２５及び還流通路２６の
一端がそれぞれ接続され、それらの他端はバンジョーユ
ニオン２７を介して燃料噴射ポンプ２８の吸入ポート２
９に接続される。この燃料噴射ポンプ２８は燃料タンク
１より低い位置に配置されている。The connecting unit 9 has a connecting pipe 23 that communicates with the outlet 22 of the lower end plate 4 of the fuel filter 2.
One end of a supply passage 25 and a recirculation passage 26 are connected to the introduction pipe 17, respectively, and the other ends thereof are connected to the suction port 2 of a fuel injection pump 28 via a banjo union 27.
Connected to 9. This fuel injection pump 28 is arranged at a lower position than the fuel tank 1.
バンジョーユニオン２７は、吸入ポート２９に螺着され
るボルト３０と、このボルト３０により燃料噴射ポンプ
２８に固着される目玉部材３１とから構成され、目玉部
材３１に前記供給通路２５が接続され、ボルト３０の頭
部に前記還流通路２６が接続される。ボルト３０は、還
流通路２６及び吸入ポート２９間を連通ずる縦孔３２と
、この群孔３２を目玉部材３１の、供給通路２５に連な
る環状溝３３に連通する横孔３４とを有する。The banjo union 27 is composed of a bolt 30 that is screwed into the suction port 29, and an eye member 31 that is fixed to the fuel injection pump 28 by the bolt 30. The supply passage 25 is connected to the eye member 31, and the bolt The reflux passage 26 is connected to the head of the valve 30 . The bolt 30 has a vertical hole 32 that communicates between the reflux passage 26 and the suction port 29, and a horizontal hole 34 that communicates the group hole 32 with an annular groove 33 of the eye member 31 that communicates with the supply passage 25.
上記縦孔３２の内壁には、横孔３４と還流通路２６との
間で弁座３５が突設され、この弁座３５と協働するフロ
ート型の一方向弁３６が縦孔３２に収容される。この一
方向弁３６は吸入ポート２９内の減圧により閉じられ昇
圧により開かれるようになっている。A valve seat 35 is protruded from the inner wall of the vertical hole 32 between the horizontal hole 34 and the reflux passage 26, and a float type one-way valve 36 that cooperates with the valve seat 35 is housed in the vertical hole 32. Ru. This one-way valve 36 is closed when the pressure in the suction port 29 is reduced and opened when the pressure is increased.
一方、燃料噴射ポンプ２８の吐出ポート３７には高圧通
路３８を介してディーゼルエンジンの噴射ノズル３９．
３９・・・が接続される。On the other hand, the discharge port 37 of the fuel injection pump 28 is connected to the injection nozzle 39 of the diesel engine via the high pressure passage 38.
39... are connected.
燃料噴射ポンプ２日は、エンジンにより機械的に駆動さ
れる公知のプランジャ型であって、プランジャの吸入行
程では吸入ポート２９から一定量の燃料を吸入し、吐出
行程ではエンジンの回転数及び負荷に応じて上記吸入燃
料の一部を吐出ポート３７へ圧送し、余剰分を吸入ポー
ト２９へ戻すようになっている。The fuel injection pump 2 is a known plunger type that is mechanically driven by the engine, and during the intake stroke of the plunger, a fixed amount of fuel is sucked in from the intake port 29, and during the discharge stroke, the fuel injection pump is driven by the engine speed and load. Accordingly, a portion of the intake fuel is force-fed to the discharge port 37, and the surplus is returned to the intake port 29.
尚、図中４０は燃料タ：ノク１の給油口を閉じるタンク
キャップである。In addition, numeral 40 in the figure is a tank cap that closes the fuel filler port of the fuel tank 1.
次にこの実施例の作用を説明する。Next, the operation of this embodiment will be explained.
先ず空の燃料タンク１に燃料が注入されていくと、その
燃料は燃料フィルタ２のエレメント７及び円筒コア６を
通過して濾過された後、供給通路２５を流下して燃料噴
射ポンプ２８の吸入ポート２９に流入する。その際、供
給通路２５内の空気は上記燃料に押されてフロート型の
一方向弁３６を開きながら還流通路２６へ移り、導入管
１７を経て還流函１４に排出される。こうして、供給通
路２５内の空気は燃料と確実に置換される。First, when fuel is injected into the empty fuel tank 1, the fuel passes through the element 7 and the cylindrical core 6 of the fuel filter 2 and is filtered, and then flows down the supply passage 25 and is sucked into the fuel injection pump 28. Flows into port 29. At this time, the air in the supply passage 25 is pushed by the fuel and moves to the reflux passage 26 while opening the float-type one-way valve 36, and is discharged into the reflux box 14 via the introduction pipe 17. In this way, the air within the supply passage 25 is reliably replaced with fuel.
供給通路２５内が燃料で満たされた後は、燃料タンク１
内の油面上昇に伴い燃料フィルタ２内にも燃料が満たさ
れていくと同時に、燃料フィルタ２内の空気は排気筒１
１を経て還流函１４に排出されていくので、燃料フィル
タ２内に空気が残留することはない。After the supply passage 25 is filled with fuel, the fuel tank 1
As the oil level inside the fuel filter 2 rises, the fuel filter 2 is also filled with fuel, and at the same time, the air inside the fuel filter 2 flows into the exhaust pipe 1.
1 and is discharged into the recirculation box 14, so that no air remains in the fuel filter 2.
燃料タンク１内の油面がフロート弁２１の高さに到達す
る前の段階では、フロート弁２１は弁座２０から離間し
ているので、還流函１４内に排出された空気は弁函１９
を通過して燃料タンク１内に排出される。Before the oil level in the fuel tank 1 reaches the height of the float valve 21, the float valve 21 is spaced apart from the valve seat 20, so the air discharged into the reflux box 14 flows into the valve box 19.
and is discharged into the fuel tank 1.
こうして、供給通路２５及び燃料フィルタ２内は、燃料
タンク１内の油面上昇に応じて燃料により確実に満たさ
れていくが、その油面がフロート弁２１の高さを超える
と、フロート弁２１が浮力で弁座２０に着座するので、
還流函１４からの空気の排出が止まり、還流函１４内は
空気溜となる。In this way, the supply passage 25 and the fuel filter 2 are reliably filled with fuel as the oil level in the fuel tank 1 rises, but when the oil level exceeds the height of the float valve 21, the float valve 21 sits on the valve seat 20 due to buoyancy, so
The discharge of air from the reflux box 14 stops, and the inside of the reflux box 14 becomes an air pocket.
したがって、還流函１４が燃料中に没しても、未濾過燃
料が還流函１４及び排気筒１１を通して燃料フィルタ２
内へ流入することを防止することができる。Therefore, even if the recirculation box 14 is submerged in fuel, unfiltered fuel passes through the recirculation box 14 and the exhaust pipe 11 and reaches the fuel filter 2.
It is possible to prevent the liquid from flowing into the interior.
エンジンの運転中、燃料噴射ポンプ２８の吸入行程によ
れば、燃料フィルタ２で濾過された燃料が供給通路２５
を経て燃料噴射ポンプ２８に一定量吸入され、その際、
吸入ポート２９の減圧により一方向弁３６は閉じられる
。次いで燃料噴射ポンプ２日の吐出行程によれば、上記
吸入燃料の一部は高圧通路３８へ圧送されて噴射ノズル
３９からエンジンの燃焼室へ噴射され、余剰分は吸入ポ
ート２９へ押し戻され、その圧力により一方向弁３６が
開かれるので、余剰燃料は主として還流通路２６を流れ
、そして導入管１７から還流函１４内の受［１２上に排
出される。こうして受皿１２に溜った燃料は小孔１３を
徐々に通って排気筒１１から燃料フィルタ２内に流れ落
ち、そして燃料噴射ポンプ２８の吸入行程により、濾過
後の他の燃料と共に再び供給通路２５へ供給されるので
、燃料フィルタ２の負担を軽減することができる。During the operation of the engine, according to the suction stroke of the fuel injection pump 28, fuel filtered by the fuel filter 2 is supplied to the supply passage 25.
A certain amount of fuel is sucked into the fuel injection pump 28 through
The one-way valve 36 is closed due to the reduced pressure in the suction port 29. Next, according to the discharge stroke of the fuel injection pump on the second day, a part of the intake fuel is force-fed to the high-pressure passage 38 and injected from the injection nozzle 39 into the combustion chamber of the engine, and the surplus is pushed back to the intake port 29. Since the one-way valve 36 is opened by the pressure, the excess fuel mainly flows through the reflux passage 26 and is discharged from the inlet pipe 17 onto the receiver [12] in the reflux box 14. The fuel thus collected in the saucer 12 gradually passes through the small holes 13 and flows down from the exhaust pipe 11 into the fuel filter 2, and is then supplied to the supply passage 25 together with other filtered fuel by the suction stroke of the fuel injection pump 28. Therefore, the burden on the fuel filter 2 can be reduced.
ところで、受皿１２は、燃料噴射ポンプ２８の作動中、
還流通路２６から排出された燃料によって常に満たされ
ているので、燃料フィルタ２内の減圧時でも、還流函１
４内の空気が排気筒１１から燃料フィルタ２内に吸込ま
れることを防止することができる。By the way, while the fuel injection pump 28 is operating, the saucer 12 is
Since the reflux passage 26 is always filled with fuel discharged from the reflux passage 26, even when the pressure inside the fuel filter 2 is reduced, the reflux box 1
4 can be prevented from being sucked into the fuel filter 2 from the exhaust pipe 11.
受皿１２から溢れ出た燃料は還流函１４の底板１６上に
溜り、それに伴い還流函１４内の圧力が上昇してフロー
ト弁２１が開くと、底板１６上の燃料は弁函２０を通し
て燃料タンク１内に排出される。The fuel overflowing from the saucer 12 accumulates on the bottom plate 16 of the reflux box 14, and when the pressure inside the reflux box 14 increases and the float valve 21 opens, the fuel on the bottom plate 16 passes through the valve box 20 and flows into the fuel tank 1. discharged inside.
Ｃ６発明の効果
以上のように本発明によれば、燃料タンク内で燃料フィ
ルタ上方に配設される還流函と燃料フィルタとを排気筒
を介して相互に連通し、また同還流函と燃料噴射ポンプ
の吸入ポートとを、還流通路及び該吸入ポート内の減圧
時に閉じ昇圧時に開く一方向弁を介して連通し、前記還
流函の下部に還流函の内外と連通ずる弁函を設けると共
に、この弁函にこれを浮力で閉じ得るフロート弁を収容
したので、燃料タンクへの給油時、油面がフロー１・弁
に達する前に、燃料フィルタ及び供給通路内の空気が還
流函及び弁函を通して排出され、燃料供給系を燃料で確
実に満たすことができる。そして油面がフローｌ−弁の
高さを超えても、フロート弁の閉鎖により未濾過燃料の
燃料フィルタ内への流入を防止することができ、燃料供
給系には常に濾過燃料のみを供給して、目詰り等の故障
を未然に防止すると共に、エンジンの安定した運転を保
障することができる。C6 Effects of the Invention As described above, according to the present invention, the recirculation box disposed above the fuel filter in the fuel tank and the fuel filter are communicated with each other via the exhaust pipe, and the recirculation box and the fuel injection It communicates with the suction port of the pump through a reflux passage and a one-way valve that closes when the pressure in the suction port is reduced and opens when the pressure increases, and a valve box is provided at the lower part of the reflux box and communicates with the inside and outside of the reflux box. A float valve that can be closed by buoyancy is housed in the valve case, so when refueling the fuel tank, the air in the fuel filter and supply passage passes through the return box and valve case before the oil level reaches the flow 1 valve. can be discharged to ensure that the fuel supply system is filled with fuel. Even if the oil level exceeds the height of the flow l-valve, the float valve can be closed to prevent unfiltered fuel from flowing into the fuel filter, ensuring that only filtered fuel is always supplied to the fuel supply system. As a result, troubles such as clogging can be prevented, and stable operation of the engine can be guaranteed.
図面は本発明の一実施例を示す要部縦断側面図である。
工・・・燃料タンク、２・・・燃料フィルタ、１１・・
・排気筒、１４・・・還流函、１９・・・弁函、２０・
・・弁座、２１・・・フロート弁、２５・・・供給通路
、２６・・・還流通路、２日・・・燃料噴射ポンプ、２
９・・・吸入ポート、３６・・・一方向弁、３７・・・
吐出ポート、３８・・・高圧通路、３９・・・噴射ノズ
ル
特 許 出 願 人 本田技研工業株式会社代理人
弁理士 落 合 健The drawing is a longitudinal sectional side view of a main part showing an embodiment of the present invention. Engineering: fuel tank, 2: fuel filter, 11:
・Exhaust pipe, 14... Reflux box, 19... Valve box, 20.
...Valve seat, 21...Float valve, 25...Supply passage, 26...Recirculation passage, 2nd...Fuel injection pump, 2
9... Suction port, 36... One-way valve, 37...
Discharge port, 38...High pressure passage, 39...Injection nozzle Patent Applicant: Honda Motor Co., Ltd. Representative Patent Attorney Ken Ochiai
Claims (1)
、吐出行程で余剰燃料を吸入ポートへ戻す燃料噴射ポン
プの吸入ポートを、この燃料噴射ポンプより高い位置を
占める燃料タンク内に設置された燃料フィルタに供給通
路を介して連通した燃料供給系の空気抜き装置であって
、燃料タンク内で燃料フィルタ上方に配設される還流函
と燃料フィルタとを排気筒を介して相互に連通し、また
同還流函と燃料噴射ポンプの吸入ポートとを、還流通路
及び該吸入ポート内の減圧時に閉じ昇圧時に開く一方向
弁を介して連通し、前記還流函の下部に還流函の内外と
連通する弁函を設けると共に、この弁函にこれを浮力で
閉じ得るフロート弁を収容してなる燃料供給系の空気抜
き装置。A fuel filter installed in the fuel tank that occupies a higher position than the fuel injection pump intake port of the fuel injection pump that sucks in a certain amount of fuel through the intake port during the intake stroke and returns excess fuel to the intake port during the discharge stroke. An air venting device for a fuel supply system that communicates with the fuel filter through a supply passage, which communicates with the fuel filter and a recirculation box disposed above the fuel filter in the fuel tank through an exhaust pipe, and The box and the suction port of the fuel injection pump are communicated through a reflux passage and a one-way valve that closes when the pressure in the suction port is reduced and opens when the pressure increases, and a valve box is provided at the bottom of the reflux box that communicates with the inside and outside of the reflux box. An air venting device for a fuel supply system, which is provided with a float valve which can be closed by buoyancy in the valve case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62290228A JPH01134061A (en) | 1987-11-17 | 1987-11-17 | Deaerator for fuel supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62290228A JPH01134061A (en) | 1987-11-17 | 1987-11-17 | Deaerator for fuel supply system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01134061A true JPH01134061A (en) | 1989-05-26 |
Family
ID=17753415
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62290228A Pending JPH01134061A (en) | 1987-11-17 | 1987-11-17 | Deaerator for fuel supply system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01134061A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010121472A (en) * | 2008-11-17 | 2010-06-03 | Yanmar Co Ltd | Fuel filter |
-
1987
- 1987-11-17 JP JP62290228A patent/JPH01134061A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010121472A (en) * | 2008-11-17 | 2010-06-03 | Yanmar Co Ltd | Fuel filter |
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