JPH059495Y2 - - Google Patents
Info
- Publication number
- JPH059495Y2 JPH059495Y2 JP1987149762U JP14976287U JPH059495Y2 JP H059495 Y2 JPH059495 Y2 JP H059495Y2 JP 1987149762 U JP1987149762 U JP 1987149762U JP 14976287 U JP14976287 U JP 14976287U JP H059495 Y2 JPH059495 Y2 JP H059495Y2
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- oil
- fuel pump
- pump
- return
- 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
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- Fuel-Injection Apparatus (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は、例えば自動車等のエンジンに燃料タ
ンク内の燃料を噴射して供給するのに好適に用い
られる燃料噴射装置に関し、特に、戻し配管から
の戻り油によつて燃料タンク内の燃料ポンプを効
果的に冷却できるようにした燃料噴射装置のポン
プ冷却装置に関する。[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a fuel injection device suitably used to inject and supply fuel in a fuel tank to an engine of an automobile, etc. The present invention relates to a pump cooling device for a fuel injection device that can effectively cool a fuel pump in a fuel tank using return oil from the fuel tank.
第３図に従来技術の燃料噴射装置を示す。 FIG. 3 shows a prior art fuel injection device.
図において、１は自動車の後部等に搭載され、
燃料Ｆを収容している燃料タンク、２は該燃料タ
ンク１内に設けられた燃料ポンプを示し、該燃料
ポンプ２はブラケツト３等により燃料タンク１内
に垂下するようにして取付けられ、内部にはモー
タ部とポンプ部（いずれも図示せず）が設けられ
ている。そして、該燃料ポンプ２はモータ部に外
部から給電を行うことにより、該モータ部の回転
子（図示せず）によつてポンプ部を回転させ、フ
イルタ４から燃料タンク１内の燃料Ｆを吸込みつ
つ、吐出ポート５から後述の噴射弁８等に向けて
吐出させるようになつている。 In the figure, 1 is mounted on the rear of a car, etc.
A fuel tank accommodating fuel F, 2 indicates a fuel pump provided in the fuel tank 1, and the fuel pump 2 is installed so as to hang down inside the fuel tank 1 by means of a bracket 3, etc. is provided with a motor section and a pump section (both not shown). The fuel pump 2 supplies power to the motor section from the outside, causes the pump section to be rotated by a rotor (not shown) of the motor section, and sucks the fuel F in the fuel tank 1 from the filter 4. At the same time, the fuel is discharged from the discharge port 5 toward an injection valve 8, which will be described later.
６は一端側が吐出ポート５に接続され、燃料ポ
ンプ２から吐出された燃料Ｆを噴射弁８に供給す
る供給配管を示し、該供給配管６の他端側は後述
の圧力レギユレータ９と接続され、該供給配管６
内の燃圧は所要の値に調整されるようになつてい
る。７は供給配管６の途中に設けられた燃料フイ
ルタ、８は該燃料フイルタ７よりも下流側に位置
して、供給配管６の途中に設けられた噴射弁を示
し、該噴射弁８は供給配管６内の燃料Ｆをエンジ
ンのインテークマニホールド（図示せず）等に向
けて噴射させるようになつている。なお、該噴射
弁８は第３図中に二点鎖線で示す位置に設けるよ
うにしてもよい。 Reference numeral 6 indicates a supply pipe whose one end side is connected to the discharge port 5 and supplies the fuel F discharged from the fuel pump 2 to the injection valve 8, and the other end side of the supply pipe 6 is connected to a pressure regulator 9, which will be described later. The supply pipe 6
The fuel pressure inside is adjusted to the required value. Reference numeral 7 indicates a fuel filter provided in the middle of the supply pipe 6; 8 indicates an injection valve located downstream of the fuel filter 7 and provided in the middle of the supply pipe 6; The fuel F in 6 is injected toward the engine's intake manifold (not shown) or the like. Note that the injection valve 8 may be provided at the position shown by the two-dot chain line in FIG.
９は供給配管６内の燃圧を調整する圧力レギユ
レータを示し、該圧力レギユレータ９は内部をダ
イヤフラムにより燃料室と制御圧室（いずれも図
示せず）に画成され、燃料室の入口側は供給配管
６と、出口側は後述の戻し配管１１と接続されて
いる。そして、該圧力レギユレータ９は制御圧室
が空気導管１０を介してエンジンのインテークマ
ニホールドと接続され、このインテークマニホー
ルドからの吸込空気圧に応じて供給配管６内の燃
圧を調整し、過剰圧となつた燃料Ｆを戻り油とし
て燃料室の出口側から戻し配管１１内へと戻すよ
うになつている。 Reference numeral 9 indicates a pressure regulator that adjusts the fuel pressure in the supply pipe 6. The inside of the pressure regulator 9 is defined by a diaphragm into a fuel chamber and a control pressure chamber (neither of which are shown), and the inlet side of the fuel chamber is connected to the supply pipe 6. The piping 6 and the outlet side are connected to a return piping 11, which will be described later. The pressure regulator 9 has a control pressure chamber connected to an engine intake manifold via an air conduit 10, and adjusts the fuel pressure in the supply pipe 6 according to the intake air pressure from the intake manifold to prevent excess pressure. The fuel F is returned as return oil into the return pipe 11 from the outlet side of the fuel chamber.
さらに、１１は一端側が圧力レギユレータ９に
接続され、他端側が燃料タンク１内へと開口した
戻し配管を示し、該戻し配管１１は圧力レギユレ
ータ９の過剰油を戻り油として順次燃料タンク１
内へと戻すことによつて、供給配管６側の燃圧を
調整された圧力状態に保つようになつている。こ
こで、該戻し配管１１は圧力レギユレータ９、噴
射弁８等と共に部分的にエンジンルーム内に配設
され、該戻し配管１１内の燃料Ｆ等によつてエン
ジン等を冷却するようになつている。このため、
該戻し配管１１から燃料タンク１内に戻される戻
り油F1の燃温は、例えば70〜80℃程度まで上昇
してしまう。 Further, reference numeral 11 indicates a return pipe whose one end is connected to the pressure regulator 9 and whose other end opens into the fuel tank 1. The return pipe 11 sequentially returns excess oil from the pressure regulator 9 to the fuel tank 1.
By returning the fuel to the inside, the fuel pressure on the supply pipe 6 side is maintained at a regulated pressure state. Here, the return pipe 11 is partially arranged in the engine room together with the pressure regulator 9, the injection valve 8, etc., and the engine etc. are cooled by the fuel F etc. in the return pipe 11. . For this reason,
The fuel temperature of the return oil F 1 returned from the return pipe 11 into the fuel tank 1 rises to, for example, about 70 to 80°C.
従来技術の燃料噴射装置は上述の如き構成を有
するもので、燃料ポンプ２のモータ部に外部から
給電を行うと、このモータ部の回転子が回転して
ポンプ部を駆動し、燃料タンク１内の燃料Ｆはフ
イルタ４から吸込まれて、吐出ポート５から供給
配管６内へと吐出される。そして、該供給配管６
内に吐出された燃料Ｆは圧力レギユレータ９によ
つて燃圧が調整され、この調整された燃料Ｆが噴
射弁８から噴射されると共に、残余の燃料Ｆは戻
し配管１１を介して燃料タンク１内へと戻り油
F1となつて順次戻されるようになる。 The conventional fuel injection device has the above-described configuration, and when power is supplied to the motor section of the fuel pump 2 from the outside, the rotor of this motor section rotates to drive the pump section, and the inside of the fuel tank 1 is The fuel F is sucked through the filter 4 and discharged from the discharge port 5 into the supply pipe 6. Then, the supply pipe 6
The fuel pressure of the fuel F discharged into the tank is adjusted by the pressure regulator 9, and the adjusted fuel F is injected from the injection valve 8, and the remaining fuel F is returned to the fuel tank 1 via a return pipe 11. return to oil
It becomes F 1 and is returned sequentially.
ところで、上述した従来技術では、戻し配管１
１からの戻り油F1が70〜80℃程度の温度になつ
ているから、燃料タンク１内の燃料Ｆの残量が第
３図に示すように少なくなつたときに、燃料タン
ク１内の燃料Ｆは70℃程度の温度まで上昇してし
まう。一方、燃料ポンプ２内の回転子等は外部か
らの給電によつて発熱するから、燃料タンク１内
の燃温が上昇すると、冷却作用が失われ、燃料ポ
ンプ２内で燃温は80℃程度まで上昇し、回転子等
は110〜130℃程度まで温度上昇してしまう。
By the way, in the above-mentioned conventional technology, the return pipe 1
Since the return oil F 1 from the fuel tank 1 has a temperature of about 70 to 80°C, when the remaining amount of fuel F in the fuel tank 1 becomes low as shown in Fig. 3, the temperature in the fuel tank 1 decreases. The temperature of fuel F rises to about 70°C. On the other hand, since the rotor etc. in the fuel pump 2 generate heat due to the external power supply, when the fuel temperature in the fuel tank 1 rises, the cooling effect is lost, and the fuel temperature in the fuel pump 2 is around 80°C. The temperature of the rotor, etc. rises to about 110 to 130 degrees Celsius.
このため、従来技術では、燃料タンク１内の燃
料Ｆの残量が少なくなつているときには、戻し配
管１１からの戻り油F1は燃料タンク１内の液面
をたたくように落下して燃料Ｆ内にベーパを発生
させ、このベーパを含んだ燃料Ｆが燃料タンク１
内に貯えられることになる。一方、燃料ポンプ２
のポンプ部内の燃料Ｆは、燃料ポンプ２の発熱で
80℃程度になつていると共に、回転子等は110〜
130℃位に高温となている。 Therefore, in the prior art, when the remaining amount of fuel F in the fuel tank 1 is low, the return oil F 1 from the return pipe 11 falls as if hitting the liquid level in the fuel tank 1, and the fuel F The fuel F containing this vapor is transferred to the fuel tank 1.
It will be stored inside. On the other hand, fuel pump 2
The fuel F in the pump section is due to the heat generated by the fuel pump 2.
The temperature is about 80℃, and the rotor etc. is about 110℃.
The temperature is around 130℃.
この状態では、高温となつている燃料ポンプ２
がベーパを含んだ燃料Ｆを吸込むと、該燃料ポン
プ２内でベーパによるキヤビテーシヨンが発生し
易くなる上に、回転子のコイル等が熱膨脹により
巻線の被覆が剥離して、途中でシヨートし、故障
原因となる等の欠点がある。 In this state, the fuel pump 2 is at a high temperature.
When the fuel F containing vapor is sucked in, cavitation due to the vapor is likely to occur in the fuel pump 2, and the coating of the winding of the rotor coil etc. peels off due to thermal expansion, causing the rotor to shoot out midway. It has drawbacks such as causing malfunctions.
本考案は上述した従来技術の欠点に鑑みなされ
たもので、本考案は戻り配管からの戻り油を燃料
ポンプの外周に散油させることによつて、該燃料
ポンプを外周側から冷却できるようにした燃料噴
射装置のポンプ冷却装置を提供するものである。 The present invention was developed in view of the above-mentioned drawbacks of the prior art, and the present invention enables the fuel pump to be cooled from the outer circumference by spraying the return oil from the return pipe around the outer circumference of the fuel pump. The present invention provides a pump cooling device for a fuel injection device.
上述した問題点を解決するために、本考案が採
用する構成の特徴は、燃料ポンプの外周に戻し配
管からの戻し油を散油すべく、全周に複数個の散
油孔が形成された中空の散油リングを前記燃料ポ
ンプの上部に取付け、該散油リングを前記戻し配
管の開口部に接続したことにある。
In order to solve the above-mentioned problems, the feature of the configuration adopted by the present invention is that a plurality of oil spray holes are formed around the outer circumference of the fuel pump in order to spray return oil from the return pipe to the outer circumference of the fuel pump. A hollow oil scattering ring is attached to the upper part of the fuel pump, and the oil scattering ring is connected to the opening of the return pipe.
燃料ポンプの外周に戻り油を散油リングの各散
油孔を介して散油するから、散油された戻り油は
燃料ポンプの全外周面に沿つて均一に流下し、途
中で気化するようになり、燃料ポンプから多量の
気化熱を奪うと共に、燃料タンク内の燃料中にベ
ーパが含まれるのを防止する。
Since the returning oil is scattered around the outer circumference of the fuel pump through each oil scattering hole of the oil scattering ring, the returned oil that has been sprayed flows down uniformly along the entire outer circumferential surface of the fuel pump and vaporizes on the way. This removes a large amount of vaporization heat from the fuel pump and prevents vapor from being included in the fuel in the fuel tank.
以下、本考案の実施例を第１図および第２図に
基づいて説明する。なお、実施例では前述した第
３図に示す従来技術と同一の構成要素に同一の符
号を付し、その説明を省略するものとする。
Embodiments of the present invention will be described below with reference to FIGS. 1 and 2. In this embodiment, the same components as those of the prior art shown in FIG.
図中、２１は戻し配管を示し、該戻し配管２１
は従来技術で述べた戻し配管１１とほぼ同様に形
成され、その一端側は圧力レギユレータ９の出口
側に接続され、他端側は燃料タンク１内へと開口
する開口部２１Ａとなつている。そして、該戻し
配管２１の開口部２１Ａは燃料タンク１の上面側
から該燃料タンク１内へと突出し、後述の散油リ
ング２３にゴムホース２２を介して接続されるよ
うになつている。 In the figure, 21 indicates a return pipe, and the return pipe 21
is formed in substantially the same manner as the return pipe 11 described in the prior art section, one end of which is connected to the outlet side of the pressure regulator 9, and the other end is an opening 21A that opens into the fuel tank 1. The opening 21A of the return pipe 21 projects into the fuel tank 1 from the upper surface side of the fuel tank 1, and is connected to an oil spray ring 23, which will be described later, via a rubber hose 22.
２３はブラケツト３の下側に位置して、燃料ポ
ンプ２の上部外周側に取付けられた散油リングを
示し、該散油リング２３は、例えばガラス繊維材
料（重量比30％）によつて強化された６−６ナイ
ロン等の繊維強化樹脂材料により、第２図に示す
如く中空のリング状に形成され、その断面形状は
略長方形または正方形状となつている。また、該
散油リング２３の外周側には径方向外向きに筒状
の接続部２３Ａが突設され、該接続部２３Ａは散
油リング２３内に戻り配管２１からの戻り油F1
を導入すべく、該戻り配管２１の開口部２１Ａと
ゴムホース２２を介して接続されている。そし
て、該散油リング２３の底面側には周方向に所定
間隔をもつて小径の散油孔２３Ｂ，２３Ｂ，……
が第２図中に示す如く列設され、該各散油孔２３
Ｂは戻り配管２１からの戻り油F1を燃料ポンプ
２の外周にほぼ全周に亘つて散油させるようにな
つている。 Reference numeral 23 indicates an oil scattering ring located below the bracket 3 and attached to the upper outer peripheral side of the fuel pump 2, and the oil scattering ring 23 is reinforced with, for example, glass fiber material (30% by weight). As shown in FIG. 2, it is made of a fiber-reinforced resin material such as 6-6 nylon, and is formed into a hollow ring shape, and its cross-sectional shape is approximately rectangular or square. Further, a cylindrical connecting portion 23A is provided on the outer peripheral side of the oil dispersing ring 23 to protrude outward in the radial direction, and the connecting portion 23A returns oil F 1 from the piping 21 into the oil dispersing ring 23 .
It is connected to the opening 21A of the return pipe 21 via a rubber hose 22 in order to introduce it. On the bottom side of the oil dispersion ring 23, small diameter oil dispersion holes 23B, 23B, . . . are arranged at predetermined intervals in the circumferential direction.
are arranged in a row as shown in FIG. 2, and each oil spray hole 23
B is designed to spray the return oil F 1 from the return pipe 21 over almost the entire circumference of the fuel pump 2 .
本実施例は上述の如き構成を有するもので、燃
料噴射装置としての作動については従来技術によ
るものと格別差異はない。 This embodiment has the configuration as described above, and there is no particular difference in operation as a fuel injection device from that of the prior art.
然るに本実施例では、燃料ポンプ２の上部外周
側に散油リング２３を取付け、該散油リング２３
の接続部２３Ａを戻し配管２１の開口部２１Ａと
ゴムホース２２を介して接続すると共に、該散油
リング２３の底面側には小径の散油孔２３Ｂを多
数個穿設し、該各散油孔２３Ｂによつて戻り配管
２１からの戻り油F1を燃料ポンプ２の外周に散
油させる構成としたから、散油された戻り油F1
は燃料ポンプ２の外周面に沿つて上部側から順次
流下し、該燃料ポンプ２を冷却するばかりでな
く、燃料ポンプ２からの熱によつて途中で気化す
るようになり、このときに燃料ポンプ２から多量
の気化熱を奪つて、該燃料ポンプ２を効果的に冷
却することができる。 However, in this embodiment, the oil sprinkling ring 23 is attached to the upper outer peripheral side of the fuel pump 2, and the oil sprinkling ring 23
The connecting portion 23A of the return pipe 21 is connected to the opening 21A of the return pipe 21 via the rubber hose 22, and a large number of small diameter oil sprinkling holes 23B are bored on the bottom side of the oil sprinkling ring 23, and each of the oil sprinkling holes 23B, the return oil F 1 from the return pipe 21 is sprinkled on the outer periphery of the fuel pump 2, so the sprayed return oil F 1
flows down sequentially from the upper side along the outer peripheral surface of the fuel pump 2, and not only cools the fuel pump 2, but also vaporizes on the way due to the heat from the fuel pump 2, and at this time, the fuel pump The fuel pump 2 can be effectively cooled by removing a large amount of heat of vaporization from the fuel pump 2.
即ち、散油リング２３の底面側に多数穿設した
各散油孔２３Ｂは小径に形成されているから、戻
り配管２１からの戻り油F1を燃料ポンプ２の外
周面に細かく分散させて散油することができ、戻
り油F1の気化を促進させて、燃料ポンプ２から
効率的に気化熱を抜熱でき、該燃料ポンプ２を確
実に冷却することができる。 That is, since each of the oil spray holes 23B formed in large numbers on the bottom side of the oil spray ring 23 is formed with a small diameter, the return oil F1 from the return pipe 21 is finely dispersed and sprayed on the outer peripheral surface of the fuel pump 2. It is possible to accelerate the vaporization of the return oil F 1 , efficiently remove the heat of vaporization from the fuel pump 2, and reliably cool the fuel pump 2.
従つて、本実施例によれば、燃料タンク１内の
燃料Ｆの残量が少なくなつて、燃温が70℃程度ま
で上昇し、燃料ポンプ２内を流通する燃料Ｆによ
つて回転子等を冷却できなくなつたときでも、散
油リング２３の各散油孔２３Ｂから散油される戻
り油F1によつて燃料ポンプ２から気化熱を奪い
つつ、該燃料ポンプ２の回転子等を効果的に冷却
でき、回転子のコイル等の熱膨脹を低減して巻線
の被覆剥離を防止するから、該回転子のコイルが
途中でシヨートするのを防止しうる。また、散油
リング２３により燃料ポンプ２の全外周面に沿つ
て戻り油F1を均一に流下させるから、燃料タン
ク１内の燃料Ｆの残量が少ない場合でも、戻り油
が油面をたたいて、燃料タンク１内の燃料Ｆ中に
ベーパが含まれるのを防止する。かくして、燃料
ポンプ２の冷却作用と燃料Ｆ中にベーパが含まれ
ることをなくすことの相乗効果により、燃料ポン
プ２内に吸込まれた燃料Ｆにキヤビテーシヨンが
発生するのを防止できる。 Therefore, according to this embodiment, when the remaining amount of fuel F in the fuel tank 1 decreases, the fuel temperature rises to about 70°C, and the rotor etc. Even when it becomes impossible to cool the fuel pump 2, the return oil F1 sprayed from each oil sprinkling hole 23B of the oil sprinkling ring 23 removes vaporization heat from the fuel pump 2 and cools the rotor of the fuel pump 2. Since it can be effectively cooled, thermal expansion of the rotor coils, etc. is reduced and coating peeling of the windings is prevented, it is possible to prevent the rotor coils from being shot midway. In addition, since the return oil F 1 is uniformly flowed down along the entire outer peripheral surface of the fuel pump 2 by the oil scattering ring 23, even when the remaining amount of fuel F in the fuel tank 1 is small, the return oil keeps the oil level. In most cases, vapor is prevented from being included in the fuel F in the fuel tank 1. Thus, due to the synergistic effect of the cooling effect of the fuel pump 2 and eliminating the inclusion of vapor in the fuel F, cavitation can be prevented from occurring in the fuel F sucked into the fuel pump 2.
なお、前記実施例では、散油リング２３の底面
側に多数の散油孔２３Ｂを列設するものとして述
べたが、本考案はこれに限らず、各散油孔２３Ｂ
を散油リング２３の上面側に列設し、該散油リン
グ２３の外周面を介して燃料ポンプ２の外周面へ
と戻り油F1を流下させるようにしてもよい。 In the above embodiment, a large number of oil spray holes 23B are arranged in a row on the bottom side of the oil spray ring 23, but the present invention is not limited to this.
may be arranged in a row on the upper surface side of the oil scattering ring 23 so that the oil F 1 returns to the outer circumferential surface of the fuel pump 2 via the outer circumferential surface of the oil scattering ring 23 and flows down.
また、散油リング２３の断面形状は略長方形、
正方形状に限らず、円形状であつてもよいことは
勿論である。 Further, the cross-sectional shape of the oil dispersion ring 23 is approximately rectangular.
Of course, the shape is not limited to a square shape, and may be a circular shape.
以上詳述した通り、本考案によれば、燃料ポン
プの上部に複数個の散油孔が形成された中空の散
油リングを取付け、該散油リングを戻し配管の開
口部に接続し、該戻し配管からの戻り油を各散油
孔を介して燃料ポンプの外周に散油する構成とし
たから、散油された戻り油は燃料ポンプの全外周
面に沿つて均一に流下し、流下する途中で、燃料
ポンプの発熱による気化を促進し、燃料ポンプか
ら多量の気化熱を奪つて、該燃料ポンプの回転子
等を効果的に冷却することができ、回転子のコイ
ルが途中でシヨートするのを確実に防止できる。
As described in detail above, according to the present invention, a hollow oil sprinkling ring with a plurality of oil sprinkling holes is attached to the upper part of the fuel pump, and the oil sprinkling ring is connected to the opening of the return pipe. Since the return oil from the return piping is sprayed around the outer circumference of the fuel pump through each oil scattering hole, the sprayed return oil flows down uniformly along the entire outer circumferential surface of the fuel pump. On the way, vaporization due to the heat generated by the fuel pump is promoted, a large amount of vaporization heat is taken away from the fuel pump, and the rotor of the fuel pump can be effectively cooled, and the rotor coil can be shot midway. can be reliably prevented.
また、燃料タンク内の燃料の残量が少ない場合
でも、戻り油は燃料ポンプの全外周面に沿つて均
一に流下するから、戻り油が油面をたたいて、燃
料タンク内の燃料中にベーパが含まれるのを防止
でき、燃料ポンプの冷却作用と燃料中にベーパが
含まれなくすることの相乗効果により、燃料ポン
プ内に吸込まれた燃料にキヤビテーシヨンが発生
するのを効果的に防止することができる。 In addition, even when the amount of fuel remaining in the fuel tank is low, the return oil flows down evenly along the entire outer circumferential surface of the fuel pump, so the return oil hits the oil surface and flows into the fuel in the fuel tank. The synergistic effect of the cooling effect of the fuel pump and preventing vapor from being included in the fuel effectively prevents cavitation from occurring in the fuel sucked into the fuel pump. be able to.
第１図および第２図は本考案の実施例を示し、
第１図は燃料ポンプを取付けた燃料タンクの縦断
面図、第２図は第１図中の散油リングを一部破断
して示す斜視図、第３図は従来技術の燃料噴射装
置を示す全体図である。
１……燃料タンク、２……燃料ポンプ、３……
ブラケツト、６……供給配管、８……噴射弁、９
……圧力レギユレータ、２１……戻し配管、２１
Ａ……開口部、２２……ゴムホース、２３……散
油リング、２３Ａ……接続部、２３Ｂ……散油
孔。
1 and 2 show an embodiment of the present invention,
Fig. 1 is a vertical sectional view of a fuel tank with a fuel pump attached, Fig. 2 is a partially cutaway perspective view of the oil spray ring in Fig. 1, and Fig. 3 shows a conventional fuel injection device. This is an overall diagram. 1...Fuel tank, 2...Fuel pump, 3...
Bracket, 6... Supply piping, 8... Injection valve, 9
...Pressure regulator, 21 ...Return piping, 21
A...opening, 22...rubber hose, 23...oil spray ring, 23A...connection, 23B...oil spray hole.
Claims (1)
料ポンプから吐出された燃料を噴射弁に供給する
供給配管と、該供給配管に供給された燃料の一部
を前記燃料タンク内に戻すべく、該燃料タンク内
へと開口した戻し配管とからなる燃料噴射装置に
おいて、前記燃料ポンプには該燃料ポンプの外周
に戻し配管からの戻し油を散油すべく、全周に複
数個の散油孔が形成された中空の散油リングを前
記燃料ポンプの上部に取付け、該散油リングを前
記戻し配管の開口部に接続したことを特徴とする
燃料噴射装置のポンプ冷却装置。 A fuel pump provided in the fuel tank, a supply pipe for supplying fuel discharged from the fuel pump to the injection valve, and a supply pipe for returning part of the fuel supplied to the supply pipe to the fuel tank. In a fuel injection device comprising a return pipe opening into a fuel tank, the fuel pump has a plurality of oil spray holes around the entire circumference of the fuel pump in order to spray return oil from the return pipe onto the outer circumference of the fuel pump. A pump cooling device for a fuel injection device, characterized in that a formed hollow oil scattering ring is attached to the upper part of the fuel pump, and the oil scattering ring is connected to an opening of the return pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987149762U JPH059495Y2 (en) | 1987-09-30 | 1987-09-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987149762U JPH059495Y2 (en) | 1987-09-30 | 1987-09-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6453457U JPS6453457U (en) | 1989-04-03 |
| JPH059495Y2 true JPH059495Y2 (en) | 1993-03-09 |
Family
ID=31422288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987149762U Expired - Lifetime JPH059495Y2 (en) | 1987-09-30 | 1987-09-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH059495Y2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55177059U (en) * | 1979-06-05 | 1980-12-19 |
-
1987
- 1987-09-30 JP JP1987149762U patent/JPH059495Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6453457U (en) | 1989-04-03 |
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