JPS60156972A - fuel injector - Google Patents
fuel injectorInfo
- Publication number
- JPS60156972A JPS60156972A JP1251384A JP1251384A JPS60156972A JP S60156972 A JPS60156972 A JP S60156972A JP 1251384 A JP1251384 A JP 1251384A JP 1251384 A JP1251384 A JP 1251384A JP S60156972 A JPS60156972 A JP S60156972A
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- injector
- pressure regulator
- valve
- bypass passage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
- F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/007—Venting means
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は燃料噴射装置に係り、特にインジエク−タから
噴射する燃料の温度依存性をなくするのに好適な内燃機
関への吸入空気量に応じて加圧燃料を噴射して供給する
燃料噴射装置に関するものでおる。[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a fuel injection device, and particularly to a fuel injection device that adjusts the intake air amount to an internal combustion engine suitable for eliminating temperature dependence of fuel injected from an injector. This invention relates to a fuel injection device that injects and supplies pressurized fuel.
内燃機関へ供給する混合気は、排気規制や燃費規制の強
化にともない、高精度の空燃比の制御が必要である。こ
れに対応する手段の１つとして、特開昭５８−７９６６
６号公報にあるように吸入空気量や運転状態に応じて加
圧した燃料をインジェクタを介して供給する方法が多用
されている。The air-fuel mixture supplied to the internal combustion engine requires highly accurate control of the air-fuel ratio as exhaust regulations and fuel efficiency regulations become stricter. As one of the means to deal with this,
As disclosed in Japanese Patent No. 6, a method is often used in which pressurized fuel is supplied via an injector depending on the amount of intake air and the operating condition.
一方、燃料の枯渇にともない燃料が低質化し、アルコー
ルを混合したガソリン（ガソホール）を利用する傾向が
ある。しかし、このような燃料は、比較的低い温度で沸
騰するので、燃料通路内に気泡が発生して円滑な燃料の
供給が不可能になシやずいという問題があ夛、それの解
決が望まれている。On the other hand, as fuel becomes depleted, the quality of the fuel becomes lower and there is a tendency to use gasoline mixed with alcohol (gasohol). However, since such fuel boils at a relatively low temperature, there are many problems such as bubbles forming in the fuel passage and making it impossible to supply fuel smoothly, and it is desirable to solve this problem. It is rare.
本発明は上記に鑑みてなされたもので、その目的とする
ところは、インジェクタの周辺で発生する気泡を確実に
排出することができ、インジェクタから噴射される燃料
の温度依存性をなくすることができる燃料噴射装置を提
供することにある。The present invention has been made in view of the above, and its purpose is to be able to reliably exhaust air bubbles generated around the injector and to eliminate the temperature dependence of the fuel injected from the injector. The objective is to provide a fuel injection device that can.
本発明の特徴は、燃圧レギュレータ′の上流部と下流部
とをバイパスするバイパス通路を設け、インジェクタ周
辺の燃料中に気泡が発生したときにその気泡を燃料とと
もに上記バイパス通路から排出させる構成とした点にあ
る。A feature of the present invention is that a bypass passage is provided to bypass the upstream and downstream parts of the fuel pressure regulator', and when bubbles are generated in the fuel around the injector, the bubbles are discharged from the bypass passage along with the fuel. At the point.
以下本発明を第１図に示した実施例を用いて詳細に説明
する。The present invention will be explained in detail below using the embodiment shown in FIG.
第１図は本発明の燃料噴射装置の一実施例を示す縦断面
図である。第１図において、１はインジェクションボデ
ィ、２は絞シ弁、３は絞シ弁軸で、内燃機関の吸気マニ
ホールドには、インジェクションボディ１を取υ付けて
、運転者が操作するアクセルペタルに連動する絞シ弁軸
３と絞シ弁２により吸入空気量を制御するようにしであ
る。FIG. 1 is a longitudinal sectional view showing an embodiment of the fuel injection device of the present invention. In Figure 1, 1 is an injection body, 2 is a throttle valve, and 3 is a throttle valve shaft.Injection body 1 is attached to the intake manifold of an internal combustion engine, and is linked to the accelerator pedal operated by the driver. The amount of intake air is controlled by a throttle valve shaft 3 and a throttle valve 2.
４はインジェクタで、インジェクタ４には、燃料ポンプ
より圧送された燃料を燃料人口５より導入し、燃圧レギ
ュレータ６でほぼ一定の圧力として、内燃機関の運転状
態の情報（内燃機関の回転数、吸気圧力、絞り弁２の開
度とその開度の変化率、吸入空気量とその増減率など）
によりインジェクタ４内の弁の開弁時間と開弁周期を決
定してフィルタ７を介してノズル８より上記燃料を噴射
する。燃圧レギュレータ６は、弁体９と一体のダイヤフ
ラム１０に加わる圧力とばね１１との釣り合いによシ、
高圧状態では弁体９が開弁じて燃料を燃料出口１２より
排出し、燃料圧力を一定にする。Reference numeral 4 denotes an injector, into which fuel pumped by a fuel pump is introduced from a fuel port 5, and the pressure is maintained at a nearly constant level by a fuel pressure regulator 6, and information on the operating state of the internal combustion engine (rotational speed of the internal combustion engine, intake (pressure, throttle valve 2 opening and its rate of change, intake air amount and its rate of increase/decrease, etc.)
The valve-opening time and valve-opening period of the valve in the injector 4 are determined, and the fuel is injected from the nozzle 8 through the filter 7. The fuel pressure regulator 6 depends on the balance between the pressure applied to the diaphragm 10 integrated with the valve body 9 and the spring 11.
In a high pressure state, the valve body 9 opens and discharges fuel from the fuel outlet 12 to keep the fuel pressure constant.
ところで、上記したように、燃料の低質化により、燃料
通路内やインジェクタ４の周辺には気泡が発生しやすく
なる。特に、インジェクタ４内の弁の開閉を行わせるコ
イル外周部では、コイルからの発熱がちシ、気泡の発生
が多い。また、高地において登板運転をした場合には、
エンジンルーム内の温度が上昇して燃料中における気泡
の発生が激増する。特に、夏期の高地においては、気圧
低下と高温により気泡の発生が多く、気泡の発生による
トラブルが多くなる。By the way, as described above, due to the lower quality of fuel, bubbles tend to occur in the fuel passage and around the injector 4. Particularly, in the outer periphery of the coil that opens and closes the valve in the injector 4, the coil tends to generate heat and bubbles often occur. In addition, if you drive at a high altitude,
The temperature in the engine room rises and the generation of bubbles in the fuel increases dramatically. Particularly at high altitudes in the summer, air bubbles are often generated due to the drop in atmospheric pressure and high temperatures, leading to many problems caused by the formation of air bubbles.
燃料通路の基本的構成としては、インジェクタ４のノズ
ル８め周辺に気泡が集結することがないようすることが
必要で、気泡を含んだ燃料はインジェクタ４の上方から
排出することが望ましい。As for the basic structure of the fuel passage, it is necessary to prevent air bubbles from collecting around the nozzle 8 of the injector 4, and it is desirable that fuel containing air bubbles be discharged from above the injector 4.
そこで、本発明においては、第１図に示しだ実施例のよ
うに、インジェクタ４の外周上方に、減圧レギュレータ
６の上流部１３と下流部（燃料出口１２）とをバイパス
するバイパス通路１４を設け、バイパス通路１４をバイ
メタル１５と一体の弁１６により周辺の温度状態に応じ
て開弁し、燃圧レギュレータ６をバイパスして気泡を燃
料とともにバイパス通路１４を経て燃料出口１２より排
出するようにした。バイパス通路１７はバイパス通路１
４に比べて小径の孔で、富にバイメタル１５の周囲に燃
料を吹きつけてバイメタル１５の温度応答性を向上させ
るために設けたものである。Therefore, in the present invention, as in the embodiment shown in FIG. The bypass passage 14 is opened by a valve 16 integrated with the bimetal 15 according to the surrounding temperature state, and the fuel pressure regulator 6 is bypassed to discharge air bubbles together with fuel from the fuel outlet 12 through the bypass passage 14. Bypass passage 17 is bypass passage 1
This hole has a smaller diameter than the hole 4, and is provided to spray fuel abundantly around the bimetal 15 to improve the temperature response of the bimetal 15.
上記した本発明の実施例によれば、インジェクタ４の周
辺の燃料中に発生した気泡を確実に排出することができ
るから、高温時や高地における空燃比の制御性を大幅に
向上することができる。また、高温時や高地における内
燃機関停止後の再始動時においても、燃料通路内でのペ
ーパーロックを回避することができ、円滑な始動や始動
直後の走行性を向上することができる。According to the embodiment of the present invention described above, since bubbles generated in the fuel around the injector 4 can be reliably discharged, controllability of the air-fuel ratio at high temperatures or at high altitudes can be greatly improved. . Further, even when the internal combustion engine is restarted after being stopped at high temperatures or at high altitudes, it is possible to avoid paper lock in the fuel passage, and it is possible to improve smooth startup and running performance immediately after startup.
なお、バイメタル１５と一体の弁１６を使用しないで、
バイパス通路１７に相当する細孔のバイパス通路のみを
設けて、常時小量の燃料をこのバイパス通路を経て排出
するようにしてもよく、同等の効果を得ることができる
。In addition, without using the valve 16 integrated with the bimetal 15,
A similar effect can be obtained by providing only a bypass passage with small holes corresponding to the bypass passage 17 and constantly discharging a small amount of fuel through this bypass passage.
以上説明したように、本発明によれば、インジェクタの
周辺で発生する気泡を確実に排出することができ、イン
ジェクタから噴射される燃料の温度依存性をなくシ、空
燃比の制御性を大幅に向上することができるという効果
があるうAs explained above, according to the present invention, bubbles generated around the injector can be reliably discharged, the temperature dependence of the fuel injected from the injector can be eliminated, and the controllability of the air-fuel ratio can be greatly improved. It has the effect of being able to improve
第１図は本発明の燃料噴射装置の一実施例を示す縦断面
図である。
１・・・インジェクションボディ、４・・・インジェク
タ、６・・・燃圧レギュレータ、８・・・ノズル、１２
・・・燃料出口、１３・・・上流部、１４．１７・・・
バイパス通路、１５・・・バイメタル、１６・・・弁。
代理人 弁理士 長崎博男
（ほか１名）FIG. 1 is a longitudinal sectional view showing an embodiment of the fuel injection device of the present invention. DESCRIPTION OF SYMBOLS 1... Injection body, 4... Injector, 6... Fuel pressure regulator, 8... Nozzle, 12
...Fuel outlet, 13...Upstream part, 14.17...
Bypass passage, 15...bimetal, 16...valve. Agent: Patent attorney Hiroo Nagasaki (and 1 other person)
Claims (1)
弁の開弁時間と開弁周期を決定してほぼ一定の燃料圧力
の燃料を噴射して空燃比を制御するようにしてなる燃料
噴射装置において、燃圧レギュレータの上流部と下流部
とをバイパスするバイパス通路を設けであることを特徴
とする燃料噴射装置。 ２、前記バイパス通路には、該バイパス通路を開閉する
感温部材と一体の弁体が設けである特許請求の範囲第１
項記載の燃料噴射装置。 ３、前記感温部材は、常時前記燃圧レギュレータの上流
側の燃料の一部が吹きつけられている特許請求の範囲第
２項記載の燃料噴射装置。[Claims] 1. Control the air-fuel ratio by injecting fuel at a substantially constant fuel pressure by determining the opening time and valve opening period of the valve in the engine/director based on information on the operating state of the internal combustion engine. A fuel injection device characterized in that the fuel injection device is provided with a bypass passage that bypasses an upstream portion and a downstream portion of the fuel pressure regulator. 2. The bypass passage is provided with a valve body integrated with a temperature-sensitive member that opens and closes the bypass passage.
The fuel injection device described in Section 1. 3. The fuel injection device according to claim 2, wherein the temperature sensing member is always sprayed with a portion of the fuel on the upstream side of the fuel pressure regulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1251384A JPS60156972A (en) | 1984-01-25 | 1984-01-25 | fuel injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1251384A JPS60156972A (en) | 1984-01-25 | 1984-01-25 | fuel injector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60156972A true JPS60156972A (en) | 1985-08-17 |
| JPH039310B2 JPH039310B2 (en) | 1991-02-08 |
Family
ID=11807424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1251384A Granted JPS60156972A (en) | 1984-01-25 | 1984-01-25 | fuel injector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60156972A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2693041A4 (en) * | 2011-03-31 | 2015-04-22 | Toyota Motor Co Ltd | FUEL INJECTION DEVICE |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58131356A (en) * | 1982-01-28 | 1983-08-05 | Toyota Motor Corp | Fuel feeding apparatus for internal-combustion engine |
| JPS5994163U (en) * | 1982-12-16 | 1984-06-26 | トヨタ自動車株式会社 | Vapor lock prevention device |
-
1984
- 1984-01-25 JP JP1251384A patent/JPS60156972A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58131356A (en) * | 1982-01-28 | 1983-08-05 | Toyota Motor Corp | Fuel feeding apparatus for internal-combustion engine |
| JPS5994163U (en) * | 1982-12-16 | 1984-06-26 | トヨタ自動車株式会社 | Vapor lock prevention device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2693041A4 (en) * | 2011-03-31 | 2015-04-22 | Toyota Motor Co Ltd | FUEL INJECTION DEVICE |
| US9194323B2 (en) | 2011-03-31 | 2015-11-24 | Toyota Jidosha Kabushiki Kaisha | Fuel injection device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH039310B2 (en) | 1991-02-08 |
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