JPS6321031B2 - - Google Patents
Info
- Publication number
- JPS6321031B2 JPS6321031B2 JP54054174A JP5417479A JPS6321031B2 JP S6321031 B2 JPS6321031 B2 JP S6321031B2 JP 54054174 A JP54054174 A JP 54054174A JP 5417479 A JP5417479 A JP 5417479A JP S6321031 B2 JPS6321031 B2 JP S6321031B2
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- partition wall
- hole
- injection
- reservoir
- 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
- 239000000446 fuel Substances 0.000 claims description 106
- 238000002347 injection Methods 0.000 claims description 43
- 239000007924 injection Substances 0.000 claims description 43
- 238000005192 partition Methods 0.000 claims description 18
- 239000002828 fuel tank Substances 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Landscapes
- Fuel-Injection Apparatus (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Description
【発明の詳細な説明】 本発明は燃料噴射装置に関するものである。[Detailed description of the invention] The present invention relates to a fuel injection device.
一般に燃料噴射装置は各気筒に接続される吸気
マニホルドに噴射弁を設けるものが知られてい
る。 Generally, fuel injection devices are known in which an injection valve is provided in an intake manifold connected to each cylinder.
ところが、このものは噴射弁の数が多く高価に
なるという欠点がある。 However, this method has the disadvantage that it requires a large number of injection valves and is expensive.
そこで、本出願人は特開昭53−90416号で吸気
マニホルドの集合部より上流に噴射弁を配置する
燃料噴射装置を提案した。 Therefore, the present applicant proposed in Japanese Patent Laid-Open No. 53-90416 a fuel injection device in which the injection valve is disposed upstream of the gathering part of the intake manifold.
しかしながら、このような形成のものは吸気マ
ニホルド上流から燃料を供給するため燃料の途絶
という問題を解決せねばならない。 However, since this configuration supplies fuel from upstream of the intake manifold, the problem of fuel interruption must be solved.
すなわち、吸気マニホルド毎に噴射弁を設ける
方式ではいずれかの噴射弁が燃料蒸気によつてベ
ーパーロツクを生じても、他の噴射弁が支援する
ことが可能であるが、吸気マニホルドの集合部よ
り上流では噴射弁の数が少ないためベーパーロツ
クを生じるともはや支援できないという致命的な
状況におちいるからである。 In other words, in a system in which an injector is provided for each intake manifold, even if one of the injectors develops vapor lock due to fuel vapor, other injectors can provide support; This is because the number of injection valves is small, and if vapor lock occurs, a fatal situation will occur in which support will no longer be possible.
本発明の目的は、燃料蒸気によつてベーパーロ
ツクが生じないような燃料噴射装置を提供するこ
とにある。 SUMMARY OF THE INVENTION An object of the present invention is to provide a fuel injection device that does not cause vapor lock due to fuel vapor.
本発明の特徴は、
(a) 内部に燃料溜り３２が形成されたジヤケツ
ト；
(b) 前記燃料溜りに収納され、前記ジヤケツトの
底部に形成された燃料噴射孔に液密的に接触し
た隔壁；
(c) 前記隔壁の内部に収納案内され、前記燃料噴
射孔へ燃料を送るため弁座と協動して燃料の流
れを制御するニードル；
(d) 前記ニードルを駆動する電磁石組立体；
(e) 前記隔壁と前記ニードルの間に形成された噴
射燃料室と前記燃料溜りを連通するため前記隔
壁に設けられた横孔；
(f) 前記隔壁に設けられた横孔より上側で前記燃
料溜りに開口した燃料入口；
(g) 前記燃料入口と同一高さで前記燃料溜りに開
口した燃料出口；
(h) 前記電磁石組立体の電機子が収納され、しか
も前記噴射燃料室と連通された収納空間；
(i) 前記収納空間と前記横孔より上側の前記燃料
溜りを連通する連通孔
りなる燃料噴射装置にある。 The features of the present invention include: (a) a jacket having a fuel reservoir 32 formed therein; (b) a partition housed in the fuel reservoir and in liquid-tight contact with a fuel injection hole formed at the bottom of the jacket; (c) a needle contained and guided within the bulkhead and cooperating with a valve seat to control the flow of fuel to direct fuel to the fuel injection hole; (d) an electromagnet assembly for driving the needle; (e) ) A horizontal hole provided in the partition wall to communicate the fuel reservoir with an injection fuel chamber formed between the partition wall and the needle; (f) A horizontal hole provided in the partition wall to communicate with the fuel reservoir above the horizontal hole provided in the partition wall; (g) a fuel outlet opening into the fuel reservoir at the same height as the fuel inlet; (h) a storage space in which the armature of the electromagnet assembly is housed and which communicates with the injection fuel chamber. (i) The fuel injection device has a communication hole that communicates the storage space with the fuel reservoir above the horizontal hole.
以下本発明を詳細に説明する。 The present invention will be explained in detail below.
第１図および第２図は燃料噴射装置の構成図で
ある。第１図において、燃料噴射弁１は配管２か
ら燃料が供給され、配管２と燃料噴射弁１を連通
する分岐管３は取り付け金具４で支持されてい
る。また、燃料噴射弁１は支持部材５によつて給
気筒６に固定されると共に、弾性シール７を介し
て圧着され気密が保持されている。給気筒６の下
端はパツキン８を介して吸入管９に接続され、吸
入管９の他端はエンジン１０の各気筒に連通する
インテークマニホルドに接続されている。したが
つて、燃料噴射弁１のノズル孔１１から噴射した
燃料は給気筒６の吸入空気と混合し、この混合気
は吸入弁１２の開弁時に気筒内に吸入される。
尚、１３は絞弁であり、燃料噴射弁１の下流位置
に設けてある。 FIG. 1 and FIG. 2 are configuration diagrams of a fuel injection device. In FIG. 1, a fuel injection valve 1 is supplied with fuel from a pipe 2, and a branch pipe 3 communicating between the pipe 2 and the fuel injection valve 1 is supported by a fitting 4. Further, the fuel injection valve 1 is fixed to the supply cylinder 6 by a support member 5, and is press-fitted via an elastic seal 7 to maintain airtightness. The lower end of the feed cylinder 6 is connected to an intake pipe 9 via a gasket 8, and the other end of the intake pipe 9 is connected to an intake manifold that communicates with each cylinder of the engine 10. Therefore, the fuel injected from the nozzle hole 11 of the fuel injection valve 1 mixes with the intake air of the intake cylinder 6, and this mixture is sucked into the cylinder when the intake valve 12 is opened.
Note that 13 is a throttle valve, which is provided at a downstream position of the fuel injection valve 1.
第２図には給気筒６と４気筒エンジンとの接続
状態が示されている。即ち、吸入管９は最初２つ
の吸入管９ａ，９ｂに分れ、各吸入管９ａ，９ｂ
は更に２つに分岐している。燃料タンクの燃料は
燃料ポンプ１４で加圧送出されフイルタ１５を通
り配管２を経て燃料噴射弁１に供給される。この
とき燃料噴射弁１の燃料圧は配管２に接続した圧
力制御弁１６によつて所定圧に制御される。ま
た、圧力制御弁１６から排出された燃料は戻り配
管１７を通つて燃料タンクへ戻される。 FIG. 2 shows the state of connection between the feed cylinder 6 and the four-cylinder engine. That is, the suction pipe 9 is initially divided into two suction pipes 9a, 9b, and each suction pipe 9a, 9b is divided into two suction pipes 9a, 9b.
is further branched into two. Fuel in the fuel tank is pressurized and delivered by a fuel pump 14, passes through a filter 15, and is supplied to the fuel injection valve 1 via a pipe 2. At this time, the fuel pressure of the fuel injection valve 1 is controlled to a predetermined pressure by a pressure control valve 16 connected to the pipe 2. Further, the fuel discharged from the pressure control valve 16 is returned to the fuel tank through the return pipe 17.
上記圧力制御弁１６は取付け金具１８、配管２
は取付け金具１９によつて吸入管２に固定されて
おり、燃料ポンプ１４は取付け金具２０で車体フ
レーム２１に固定されている。なお、配管２の各
接続個所はゴム管２２で接続され、エンジン１０
側に取り付けられた部分の振動が配管２に伝わり
燃料の流れを乱さないようにしている。また、エ
ンジン１０とは離れた位置に燃料系統を配置して
おり、給気筒６と吸入管９の間に断熱性のパツキ
ン８を介在させてエンジン３１の熱影響が減少さ
せ、燃料の加熱を防止している。 The pressure control valve 16 has a mounting bracket 18 and piping 2.
is fixed to the suction pipe 2 with a fitting 19, and the fuel pump 14 is fixed to a vehicle body frame 21 with a fitting 20. In addition, each connection point of the piping 2 is connected with a rubber pipe 22, and the engine 10
Vibrations from the parts attached to the side are transmitted to the pipe 2 to prevent the flow of fuel from being disturbed. In addition, the fuel system is located at a location separate from the engine 10, and a heat insulating gasket 8 is interposed between the feed cylinder 6 and the intake pipe 9 to reduce the thermal influence of the engine 31 and heat the fuel. It is prevented.
次に燃料噴射弁１およびその関連部分の構成を
第３図に基づき説明する。 Next, the structure of the fuel injection valve 1 and its related parts will be explained based on FIG. 3.
第３図において、燃料噴射弁１はボビン２３に
巻かれたコイル２４、ボビン２３の中央孔に固定
されたヨーク２６、ヨーク２６に吸引される電機
子２８等よりなる電磁石組立体、電機子２８に固
定されたニードル３７、電機子２８を付勢するば
ね２９、ニードル３７を収納案内する隔壁３８、
ニードル３７の上昇限界を規制するストツパ３０
およびこれらを一体的に組立結合するケース４０
より構成されている。 In FIG. 3, the fuel injection valve 1 is an electromagnet assembly consisting of a coil 24 wound around a bobbin 23, a yoke 26 fixed to a central hole of the bobbin 23, an armature 28 attracted to the yoke 26, and an armature 28. a needle 37 fixed to, a spring 29 that biases the armature 28, a partition wall 38 that accommodates and guides the needle 37,
Stopper 30 that regulates the upper limit of the needle 37
and a case 40 that integrally assembles and connects these.
It is composed of
そして、この燃料噴射弁１はジヤケツト２７に
収納される。このジヤケツト２７の底部３６には
燃料噴射孔３１があけられており、この燃料噴射
孔３１に隔壁３８がＯリング４２を介して液密的
に接触している。 This fuel injection valve 1 is housed in a jacket 27. A fuel injection hole 31 is formed in the bottom 36 of the jacket 27, and a partition wall 38 is in fluid-tight contact with the fuel injection hole 31 via an O-ring 42.
ジヤケツト２７の内部には空間が設けられて燃
料溜り３２が形成されている。この燃料溜り３２
は隔壁２８の周囲に位置して燃料噴射孔３１付近
まで延びており、隔壁に設けた横孔３９を介して
隔壁３８とニードル３７の間に形成された噴射燃
料室４３と燃料溜り３２が連通されている。 A space is provided inside the jacket 27 to form a fuel reservoir 32. This fuel reservoir 32
is located around the partition wall 28 and extends to the vicinity of the fuel injection hole 31, and the injection fuel chamber 43 formed between the partition wall 38 and the needle 37 communicates with the fuel reservoir 32 through a horizontal hole 39 provided in the partition wall. has been done.
したがつて燃料は燃料溜り３２から隔壁３８の
横孔３９を通つて噴射燃料室４３へ送られ、ニー
ドル３７が弁座４４から離れると燃料噴射孔３１
から噴射される。 Therefore, fuel is sent from the fuel reservoir 32 to the injection fuel chamber 43 through the horizontal hole 39 of the partition wall 38, and when the needle 37 leaves the valve seat 44, the fuel injection hole 31
is sprayed from.
更に、燃料溜り３２には燃料入口３３、燃料出
口３４が直接的に開口している。 Furthermore, a fuel inlet 33 and a fuel outlet 34 open directly into the fuel reservoir 32 .
そして、燃料入口３３と燃料出口３４の開口位
置は隔壁３８に設けた横孔３９より上側に位置し
て、しかも同一高さとなつている。したがつて燃
料溜り３２が燃料蒸気の分離機能を有するように
なる。 The opening positions of the fuel inlet 33 and the fuel outlet 34 are located above the horizontal hole 39 provided in the partition wall 38 and are at the same height. Therefore, the fuel reservoir 32 has a fuel vapor separation function.
以上のような構成において、燃料が燃料入口３
３から燃料溜り３２に流入すると、燃料は隔壁３
８に設けた横孔３９に送られて噴射されるが燃料
蒸気は浮力で燃料溜り３２を上昇して燃料出口へ
送られるので、噴射燃料室４３へ燃料蒸気が混入
する割合が非常に少なくなる。 In the above configuration, fuel is supplied to the fuel inlet 3.
3, the fuel flows into the fuel reservoir 32 from the partition wall 3.
The fuel vapor is sent to the horizontal hole 39 provided at 8 and injected, but the fuel vapor rises up the fuel reservoir 32 due to buoyancy and is sent to the fuel outlet, so the proportion of fuel vapor mixed into the injection fuel chamber 43 is extremely reduced. .
また、噴射燃料室４３等の燃料噴射弁１内に存
在する燃料蒸気は電機子２８付近の収納空間４５
とケース４０の外周囲を流体的に接続した連通孔
４１より燃料溜り３２に排出させるようにしてお
り、この連通孔４１は横孔３９より上側に位置し
ている。 Further, the fuel vapor existing in the fuel injection valve 1 such as the injection fuel chamber 43 is removed from the storage space 45 near the armature 28.
The fuel is discharged into the reservoir 32 through a communication hole 41 fluidly connected to the outer periphery of the case 40, and the communication hole 41 is located above the horizontal hole 39.
そして、収納空間で発生した燃料蒸気は連通孔
４１を介して燃料出口３４へ排出されるので、収
納空間の燃料蒸気は噴射燃料室４３へ至らずベー
パロツクを生じない。 Since the fuel vapor generated in the storage space is discharged to the fuel outlet 34 through the communication hole 41, the fuel vapor in the storage space does not reach the injection fuel chamber 43 and does not cause vapor lock.
以上の通り、本発明によれば、燃料蒸気は隔壁
の横孔を介して燃料噴射弁に至らずに燃料溜りで
分離され更に収納空間の燃料蒸気も連通孔を介し
て燃料出口より排出されるので、ベーパーロツク
等の問題がなくなるものである。 As described above, according to the present invention, fuel vapor is separated in the fuel reservoir without reaching the fuel injection valve through the horizontal hole in the partition wall, and fuel vapor in the storage space is also discharged from the fuel outlet through the communication hole. Therefore, problems such as vapor lock are eliminated.
第１図は燃料噴射装置の断面図、第２図は第１
図の上面図、第３図は本発明の詳細断面図であ
る。
１……燃料噴射弁、２７……ジヤケツト、３１
……燃料噴射孔、３３……燃料入口、３４……燃
料出口。
Figure 1 is a sectional view of the fuel injection device, Figure 2 is the 1st
The top view and FIG. 3 are detailed sectional views of the present invention. 1... Fuel injection valve, 27... Jacket, 31
...Fuel injection hole, 33...Fuel inlet, 34...Fuel outlet.
Claims (1)
ツト２７； (b) 前記燃料溜りに収納され、前記ジヤケツトの
底部に形成された燃料噴射孔３１に液密的に接
触した隔壁３８； (c) 前記隔壁の内部に収納案内され、前記燃料噴
射孔へ燃料を送るため弁座４４と協動して燃料
の流れを制御するニードル３７； (d) 前記ニードルを駆動する電磁石組立体２３，
２４，２６，２８； (e) 前記隔壁と前記ニードルの間に形成された噴
射燃料室４３と前記燃料溜りを連通するため前
記隔壁に設けられた横孔３９； (f) 前記隔壁に設けられた横孔より上側で前記燃
料溜りに開口した燃料入口３３； (g) 前記燃料入口と同一高さで前記燃料溜りに開
口した燃料出口３４； (h) 前記電磁石組立体の電機子２８が収納され、
しかも前記噴射燃料室と連通された収納空間４
５； (i) 前記収納空間と前記横孔より上側の前記燃料
溜りを連通する連通孔４１ とよりなる燃料噴射装置。[Scope of Claims] 1 (a) A jacket 27 having a fuel reservoir 32 formed therein; (b) A jacket 27 accommodated in the fuel reservoir and in liquid-tight contact with a fuel injection hole 31 formed at the bottom of the jacket. (c) a needle 37 that is housed and guided within the partition wall and controls the flow of fuel in cooperation with the valve seat 44 for delivering fuel to the fuel injection hole; (d) driving the needle; electromagnet assembly 23,
24, 26, 28; (e) a horizontal hole 39 provided in the partition wall for communicating the fuel reservoir with the injection fuel chamber 43 formed between the partition wall and the needle; (f) a horizontal hole 39 provided in the partition wall; a fuel inlet 33 opening into the fuel reservoir above the horizontal hole; (g) a fuel outlet 34 opening into the fuel reservoir at the same height as the fuel inlet; (h) an armature 28 of the electromagnet assembly housed therein; is,
Moreover, the storage space 4 communicates with the injection fuel chamber.
5; (i) A fuel injection device comprising a communication hole 41 that communicates the storage space with the fuel reservoir above the horizontal hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5417479A JPS55146239A (en) | 1979-05-04 | 1979-05-04 | Single-point fuel injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5417479A JPS55146239A (en) | 1979-05-04 | 1979-05-04 | Single-point fuel injector |
Related Child Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60235253A Division JPS61142361A (en) | 1985-10-23 | 1985-10-23 | Fuel injector |
| JP23525485A Division JPS61142358A (en) | 1985-10-23 | 1985-10-23 | Fuel injection valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55146239A JPS55146239A (en) | 1980-11-14 |
| JPS6321031B2 true JPS6321031B2 (en) | 1988-05-02 |
Family
ID=12963170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5417479A Granted JPS55146239A (en) | 1979-05-04 | 1979-05-04 | Single-point fuel injector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55146239A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0585350B2 (en) * | 1989-02-10 | 1993-12-07 | Toyo Seikan Kaisha Ltd |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS585463A (en) * | 1981-07-02 | 1983-01-12 | Hitachi Ltd | Electromagnetic type fuel injection valve |
| JPS58155272A (en) * | 1982-03-11 | 1983-09-14 | Mitsubishi Electric Corp | Fuel injection device |
| JPS59122777A (en) * | 1982-12-29 | 1984-07-16 | Hitachi Ltd | Fuel injection device for internal-combustion engine |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4978023A (en) * | 1972-12-02 | 1974-07-27 | ||
| JPS5523386A (en) * | 1977-10-03 | 1980-02-19 | Gen Motors Corp | Electromagnetic fuel injector |
-
1979
- 1979-05-04 JP JP5417479A patent/JPS55146239A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4978023A (en) * | 1972-12-02 | 1974-07-27 | ||
| JPS5523386A (en) * | 1977-10-03 | 1980-02-19 | Gen Motors Corp | Electromagnetic fuel injector |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0585350B2 (en) * | 1989-02-10 | 1993-12-07 | Toyo Seikan Kaisha Ltd |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55146239A (en) | 1980-11-14 |
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