JPS5818555A - Fuel supply device - Google Patents
Fuel supply deviceInfo
- Publication number
- JPS5818555A JPS5818555A JP11519781A JP11519781A JPS5818555A JP S5818555 A JPS5818555 A JP S5818555A JP 11519781 A JP11519781 A JP 11519781A JP 11519781 A JP11519781 A JP 11519781A JP S5818555 A JPS5818555 A JP S5818555A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- throttle valve
- injection valve
- fuel
- throttle
- 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
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
- F02M69/04—Injectors peculiar thereto
- F02M69/042—Positioning of injectors with respect to engine, e.g. in the air intake conduit
- F02M69/043—Positioning of injectors with respect to engine, e.g. in the air intake conduit for injecting into the intake conduit upstream of an air throttle valve
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】
本発明は絞り弁の上流に噴射弁を有する燃料供給装置に
係り、時如安定した燃料全供給するための噴射弁の取付
位置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fuel supply system having an injection valve upstream of a throttle valve, and relates to a mounting position of the injection valve for providing a stable and complete supply of fuel from time to time.
従来、絞弁の上流に噴射弁を有する燃料の供給装置にお
いては、噴射弁は絞り弁の設置さ−ｎたポワの軸と同一
軸に取付けらｎている。しかし、このような取付構造で
は装置の全長が高くなるため、絞り弁と噴射弁との間に
傾きを持たせることにより全長があまり高くならないよ
うにしている。この場合、構造上噴射弁からの噴射さｆ
″した燃料は絞り弁に衝突することになるが、噴霧の形
状は燃料の量、即ち噴射弁の開弁時間量（パルス巾）に
よって異なる。従って、開弁パルス巾に応じて、噴射弁
と絞り弁との距離を変化させることが望ましくなる。Conventionally, in a fuel supply device having an injection valve upstream of a throttle valve, the injection valve is mounted on the same axis as the shaft of the pourer on which the throttle valve is installed. However, with such a mounting structure, the overall length of the device increases, so by providing an inclination between the throttle valve and the injection valve, the overall length is prevented from increasing too much. In this case, due to the structure, the injection from the injection valve f
The sprayed fuel collides with the throttle valve, but the shape of the spray differs depending on the amount of fuel, that is, the amount of time the injector is open (pulse width). It becomes desirable to vary the distance to the throttle valve.
第１図は従来この種の上流噴射形燃料供給装置全備えた
気化器のシステム説明図である。エンジン１には吸気管
２が設けらｎており、この吸気管２にはエンジン１への
吸気量・を制御するための絞り弁３を有したスロットル
チャン・ジ４が接続さ扛ている。このスロットルチャン
バ４にはスロットル軸に対して傾斜した角度に噴射方向
が位置するように噴射弁５が取付けらｎている。この噴
射弁５はスロットルチェンバ４のベンチュリ６の横手に
設けらｆ″した通路内に設置さｎｆＣ空気流量計７の信
号を入力する別置の制御回路８において演算さｔ″ＬＬ
タパルス巾り開弁駆動さ扛、別置の燃料ポンプ９によっ
て加圧さｔ″した燃料を噴射する。従って、図に示した
如く噴射弁５からの燃料の噴霧は絞り弁３に衝突するこ
とになる。FIG. 1 is a system explanatory diagram of a carburetor equipped with all conventional upstream injection type fuel supply devices of this type. The engine 1 is provided with an intake pipe 2, and a throttle change 4 having a throttle valve 3 for controlling the amount of intake air into the engine 1 is connected to the intake pipe 2. An injection valve 5 is installed in the throttle chamber 4 so that the injection direction is located at an angle inclined to the throttle axis. This injection valve 5 is installed in a passage f'' provided on the side of the venturi 6 of the throttle chamber 4, and is calculated by a separately installed control circuit 8 which inputs the signal of the nfC air flow meter 7.
The taper width is driven to open the valve, and fuel pressurized by a separate fuel pump 9 is injected. Therefore, as shown in the figure, the fuel spray from the injection valve 5 collides with the throttle valve 3. become.
第２図及び第３図は上記噴射弁５のパルス駆動時におけ
る噴霧の形状の変化を図示したものである。即ち、第２
図はパルス幅が５ｍＳの時の噴霧形状を示しており、第
３図は１ｍＳの時の形状を示している。なお図中符号１
０は燃料に旋回力金与えるスワラ−を示しており、符号
Ｂは噴霧が安定して、しかも粒径が比較的小さい範囲で
ある最適霧化距離を示している。FIGS. 2 and 3 illustrate changes in the shape of the spray when the injection valve 5 is driven in pulses. That is, the second
The figure shows the spray shape when the pulse width is 5 mS, and FIG. 3 shows the spray shape when the pulse width is 1 mS. In addition, code 1 in the figure
0 indicates a swirler that gives swirl force to the fuel, and symbol B indicates an optimum atomization distance in which the spray is stable and the particle size is relatively small.
エンジンへの燃料の供給を１本の噴射弁で賄う場合は、
詳細な説明は省くが最犬許答のパルス巾は約５ｍＳ’″
Ｃある。この５ｍＳの場合の噴霧は燃料の量が多いため
に安定しており、前述の噴霧が安定して粒径が比較的小
さい距離Ｂはノズル（噴射孔）の先端から比較的遠い所
になる。即ち、距離Ｂが近い場合は単位面積当りの燃料
量が多くなり過ぎ、遠すぎる場合は外乱（吸気の風速）
等の条件により噴霧が曲げら扛ることになる。一方、第
３図に示したパルス巾１ｍＳ程度の場合は、燃料量が少
ないために噴霧自体が比較的不安定となり易く、″また
密度も小さいため距離Ｂは近くなる。When supplying fuel to the engine with a single injection valve,
I will omit the detailed explanation, but the pulse width of the most dog-friendly answer is approximately 5 mS'''
There is C. The spray in the case of 5 mS is stable because the amount of fuel is large, and the distance B, where the spray is stable and the particle size is relatively small, is relatively far from the tip of the nozzle (injection hole). In other words, if the distance B is close, the amount of fuel per unit area will be too large, and if it is too far, the disturbance (intake wind speed)
The spray may become distorted due to such conditions. On the other hand, when the pulse width is about 1 mS as shown in FIG. 3, the spray itself tends to be relatively unstable because the amount of fuel is small, and the density is also small, so the distance B becomes short.
第４図は以上の結果を１とめたもので、パルス巾と最適
霧化距離Ｂとの関係を示した線図である。FIG. 4 summarizes the above results and is a diagram showing the relationship between the pulse width and the optimum atomization distance B.
噴霧が安定してなおかつ粒径が小さい距離Ｂは図中１で
示した部分となる。なお、この第４図に示した結果は、
噴射弁が第２図及び第３図に示したようなスワラ−１０
による旋回力にょって霧化作用全促進しているもののデ
ータである。しかし、他の方法によって燃料に旋回力を
与える噴射弁においても同様のことが言える。The distance B where the spray is stable and the particle size is small is the part indicated by 1 in the figure. The results shown in Figure 4 are as follows:
The injection valve is a swirler 10 as shown in Figs. 2 and 3.
This data shows that the atomization effect is fully promoted by the turning force caused by the rotation force. However, the same can be said of injection valves that apply swirling force to fuel by other methods.
第４図の結果について更に検討すると、最高霧化距離Ｂ
は、■で示す範囲となり噴射弁の開弁時間のパルス巾の
増大に伴なって次第に大きくなっている。従って噴射弁
５の取付位置はこの距離Ｂに合わぜてパルス巾の増大に
伴なって変化させることが重重しい。Further consideration of the results shown in Figure 4 shows that the maximum atomization distance B
is in the range shown by ■ and gradually increases as the pulse width of the injection valve opening time increases. Therefore, it is important to change the mounting position of the injection valve 5 in accordance with this distance B as the pulse width increases.
ところで、通常燃料の噴射システムではエンジンの吸気
に同期させて燃料全噴射させる。このため、１回昌りの
燃料の噴射においては、噴射量即ちパルス巾はエンジン
の負荷を表わすことになる。By the way, in a normal fuel injection system, all fuel is injected in synchronization with the intake of the engine. Therefore, in one injection of fuel, the injection amount, that is, the pulse width, represents the engine load.
即ち絞り弁開度が大きくなるとパルス巾は長くなり距離
Ｂも大きくなる。従って、噴射弁５のノズル出口と絞り
弁３の位置は、絞り弁３の開度が大きくなる程遠くなる
ように噴射弁５の位置を選定す扛ば、パルス巾に最も最
適な距離Ｂを常に得ることができる。That is, as the throttle valve opening increases, the pulse width increases and the distance B also increases. Therefore, if the position of the injection valve 5 is selected so that the nozzle outlet of the injection valve 5 and the throttle valve 3 become farther apart as the opening degree of the throttle valve 3 becomes larger, the distance B that is most optimal for the pulse width is always maintained. Obtainable.
第５図は従来の噴射弁５の絞り弁３に対する取付位置の
詳細を示した図である。噴射弁５の噴霧の中心は絞り弁
３のＯの位置に衝突しており、噴射弁５のノズルと絞り
弁３の距離はＬである。即ち、噴射弁５の噴霧の中心は
絞り弁３の中心に対してＡだけ上流側に位置しているた
め、■の方向に絞り弁３が回動して開いた時に、噴霧の
中心が■の部分に衝突し、噴射弁５のノズルと絞り弁３
の距離はＬ′となって前記りに比べて短くなってし１う
。つ１す、従来のものでは絞り弁３が開いてパルス巾が
長くなると絞り弁３と噴射弁５との距離が短くなり距１
ｉ１［ＩＢが短くなって第４図の結果とは反対の状態が
起こる欠点がある。即ち、）；ルス巾に対する最適な噴
霧形状を得るには従来の噴射弁５の取付位置は不適当で
あるという欠点がある。FIG. 5 is a diagram showing details of the mounting position of the conventional injection valve 5 with respect to the throttle valve 3. The center of the spray from the injection valve 5 collides with the throttle valve 3 at the O position, and the distance between the nozzle of the injection valve 5 and the throttle valve 3 is L. That is, since the center of the spray from the injection valve 5 is located upstream by an amount A with respect to the center of the throttle valve 3, when the throttle valve 3 rotates in the direction of ■ and opens, the center of the spray will be located at the center of the throttle valve 3. The nozzle of the injection valve 5 and the throttle valve 3
The distance becomes L', which is shorter than the above. First, in the conventional type, when the throttle valve 3 opens and the pulse width becomes longer, the distance between the throttle valve 3 and the injection valve 5 becomes shorter, and the distance 1 becomes shorter.
There is a drawback that i1[IB becomes short and a situation opposite to the result shown in FIG. 4 occurs. That is, ); there is a drawback that the mounting position of the conventional injection valve 5 is inappropriate in order to obtain the optimum spray shape for the lus width.
本発明の目的は上記の欠点に鑑み、噴射弁からの燃料の
霧化形態が常に良好な燃料供給装置全提供するにある。SUMMARY OF THE INVENTION In view of the above drawbacks, an object of the present invention is to provide a fuel supply system in which the atomization form of fuel from an injection valve is always good.
本発明により上記の目的は、噴射弁の噴射孔軸線延長線
が絞り弁軸より下側で絞り弁と交差するように噴射弁を
スロットルチャンバ内に配置することにより達成さ扛る
。According to the present invention, the above object is achieved by arranging the injection valve in a throttle chamber such that the extension of the axis of the injection hole of the injection valve intersects the throttle valve below the throttle valve axis.
以下、本発明の一実施例を図面に従って説明する。An embodiment of the present invention will be described below with reference to the drawings.
第６図は本発明に係る燃料供給装置の一実施例の要部糾
示す説明図である。但し第５図ど同様あるいは同一構成
部分は同−符号音用いて示しである。FIG. 6 is an explanatory diagram showing a main part of an embodiment of the fuel supply device according to the present invention. However, similar or identical components to those in FIG. 5 are indicated using the same symbol.
スロットルチャンバ４内の絞り弁３に対して噴射弁５は
従来例と同様に傾斜して取付けである。The injection valve 5 is installed at an angle with respect to the throttle valve 3 in the throttle chamber 4, as in the conventional example.
しかし本実施例の特徴は噴射弁５の噴射孔軸線延長線が
絞り弁３の軸中心より下側の部分で絞り弁３と交差する
ように噴射弁５が取付けら扛でいるところにある。即ち
、絞り弁３の中心と噴射弁５の噴霧の中心とを結ぶ直線
Ａが絞り弁３に対して下流側になるように噴射弁５を配
置しである。このように噴射弁５を配置すると第５図で
示したものとは逆に、絞り弁３が右に回動して開いてく
ると絞り弁３と噴射弁５のノズル（噴射孔）の出口との
距離りは増大することになり、第４図で示したパルス巾
が大きくなると最適霧化距離Ｂが大きくなる関係を満足
することになる。即ち、パルス巾が増加するとＬが増加
する（Ｌ＝：Ｂと考える）。However, the feature of this embodiment is that the injection valve 5 is mounted so that the extension of the axis of the injection hole of the injection valve 5 intersects the throttle valve 3 at a portion below the axial center of the throttle valve 3. That is, the injection valve 5 is arranged so that the straight line A connecting the center of the throttle valve 3 and the center of the spray from the injection valve 5 is on the downstream side with respect to the throttle valve 3. When the injection valve 5 is arranged in this way, contrary to what is shown in FIG. This means that the relationship shown in FIG. 4, in which the optimum atomization distance B increases as the pulse width increases, is satisfied. That is, as the pulse width increases, L increases (consider L=:B).
本実施例によ扛ば、燃料噴射弁５の噴霧の中心線が絞り
弁３と絞り弁軸に対して下流側で交差するように噴射弁
５を配置することにより、絞り弁のどのような開弁程度
（パルス巾の増減に対応）に対しても、噴射弁５からの
噴霧の形状全常に良好なものとする効果がある。従って
、常に噴霧の程度の良い燃料を絶えずエンジンに供給で
きることになジ、エンジンにおける燃料の燃焼をスムー
ズにして排気ガスの浄化、燃料消費量の低減及び出力の
増大を図る効果がある。According to this embodiment, by arranging the injection valve 5 such that the center line of the spray from the fuel injection valve 5 intersects the throttle valve 3 and the throttle valve axis on the downstream side, it is possible to There is an effect that the shape of the spray from the injection valve 5 is always good regardless of the degree of valve opening (corresponding to an increase or decrease in pulse width). Therefore, a well-sprayed fuel can be constantly supplied to the engine, which has the effect of smoothing the combustion of fuel in the engine, purifying exhaust gas, reducing fuel consumption, and increasing output.
以上の説明から明らかなように本発明によ扛ば、燃料噴
射弁の噴射孔軸線延長線が絞り弁軸より下側で絞り弁と
交差するように燃料噴射弁全取付けることにより、噴射
弁からの燃料の霧化形態が常に良好な燃料供給装置を提
供することができる。As is clear from the above description, according to the present invention, by installing all the fuel injectors so that the extension line of the injection hole axis of the fuel injector intersects with the throttle valve below the throttle valve axis, The atomized form of fuel can always provide a good fuel supply device.
第１図は従来の燃料供給装置を備えた気化器のシステム
説明図、第２図及び第３図は第１図で示した燃料噴射弁
のパルス巾に対する燃料霧化形態を示した詳細説明図、
第４図はパルス巾と最適霧化距離Ｂとの関係を示した線
図、第５図は第１図に示した従来の噴射弁の取付角度を
示した詳細説明図、第６図は本発明に係る燃料供給装置
の一実施例の要部を示す説明図である。
１・・・エンジ／、２・・・吸気管、３・・・絞り弁、
４・・・スロットルチャンバ、５・・・噴射弁、６・・
・べ／チュリ、７・・・空気流量計、８・・・制御回路
、９・・・燃料ポンプ、茅２図
第３図
す４−図
ノＣル人中（＾５）Fig. 1 is a system explanatory diagram of a carburetor equipped with a conventional fuel supply device, and Figs. 2 and 3 are detailed explanatory diagrams showing the fuel atomization form with respect to the pulse width of the fuel injection valve shown in Fig. 1. ,
Fig. 4 is a diagram showing the relationship between pulse width and optimum atomization distance B, Fig. 5 is a detailed explanatory diagram showing the mounting angle of the conventional injection valve shown in Fig. 1, and Fig. 6 is a diagram showing the relationship between the pulse width and the optimum atomization distance B. FIG. 1 is an explanatory diagram showing a main part of an embodiment of a fuel supply device according to the invention. 1... Engine/, 2... Intake pipe, 3... Throttle valve,
4... Throttle chamber, 5... Injection valve, 6...
・B/C, 7...Air flow meter, 8...Control circuit, 9...Fuel pump, Figure 2, Figure 3, 4-Figure No. C (^5)
Claims (1)
流側に燃料を供給する燃料噴射弁を備え、エンジンへの
燃料供給量を燃料噴射弁の開弁時間により制御する燃料
供給装置において、燃料噴射弁の噴射孔軸線延長が絞り
弁軸よシ下側で絞シ弁と交差するように燃料噴射弁を絞
り弁に対し傾斜して配置し、絞り弁の開度が大きくなる
につれて前記噴射孔と絞り弁との距離が増大することを
特徴とする燃料供給装置。1. In a fuel supply device that includes a fuel injection valve that supplies fuel upstream of a throttle valve that controls the flow rate of air supplied to the engine, and controls the amount of fuel supplied to the engine by the opening time of the fuel injection valve, The fuel injection valve is arranged at an angle with respect to the throttle valve so that the extension of the injection hole axis of the injection valve intersects with the throttle valve on the lower side of the throttle valve axis, and as the opening degree of the throttle valve increases, the injection hole A fuel supply device characterized in that the distance between the and the throttle valve increases.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11519781A JPS5818555A (en) | 1981-07-24 | 1981-07-24 | Fuel supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11519781A JPS5818555A (en) | 1981-07-24 | 1981-07-24 | Fuel supply device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5818555A true JPS5818555A (en) | 1983-02-03 |
Family
ID=14656755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11519781A Pending JPS5818555A (en) | 1981-07-24 | 1981-07-24 | Fuel supply device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5818555A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6030360U (en) * | 1983-08-04 | 1985-03-01 | トヨタ自動車株式会社 | Fuel injection carburetor for internal combustion engines |
| JPS6049263U (en) * | 1983-09-13 | 1985-04-06 | トヨタ自動車株式会社 | Fuel injection carburetor for internal combustion engines |
| EP0867608A2 (en) * | 1997-03-27 | 1998-09-30 | Yamaha Hatsudoki Kabushiki Kaisha | Air intake apparatus for a four-cycle internal combustion engine |
-
1981
- 1981-07-24 JP JP11519781A patent/JPS5818555A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6030360U (en) * | 1983-08-04 | 1985-03-01 | トヨタ自動車株式会社 | Fuel injection carburetor for internal combustion engines |
| JPH029092Y2 (en) * | 1983-08-04 | 1990-03-06 | ||
| JPS6049263U (en) * | 1983-09-13 | 1985-04-06 | トヨタ自動車株式会社 | Fuel injection carburetor for internal combustion engines |
| JPH0210292Y2 (en) * | 1983-09-13 | 1990-03-14 | ||
| EP0867608A2 (en) * | 1997-03-27 | 1998-09-30 | Yamaha Hatsudoki Kabushiki Kaisha | Air intake apparatus for a four-cycle internal combustion engine |
| EP0867608A3 (en) * | 1997-03-27 | 1999-07-21 | Yamaha Hatsudoki Kabushiki Kaisha | Air intake apparatus for a four-cycle internal combustion engine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5156130A (en) | Fuel injection system | |
| JPS5818555A (en) | Fuel supply device | |
| GB2274877A (en) | Fuel injected i.c. engine. | |
| JP2822847B2 (en) | Fuel injection valve | |
| US4087492A (en) | Slow fuel supply system | |
| US5597121A (en) | Fuel injection valve | |
| JPH05340326A (en) | Fuel supply device for internal combustion engine | |
| JPH0312224B2 (en) | ||
| JPS61223268A (en) | Jet apparatus of internal combustion engine | |
| JP2617445B2 (en) | Fuel injection valve | |
| JPS59147866A (en) | Fuel injector of engine | |
| JPH0861188A (en) | Hole type injection nozzle | |
| JPS633423Y2 (en) | ||
| JPS60204920A (en) | Suction mechanism for direct injection type diesel engine | |
| JPH04209967A (en) | Fuel supply device for internal combustion engine | |
| JPH07180640A (en) | Fuel injection control device and control method | |
| JPH0344227B2 (en) | ||
| JPS61118558A (en) | Intake unit of fuel injection type engine | |
| JPH0210292Y2 (en) | ||
| JP3158775B2 (en) | Fuel injection device | |
| JPH05133233A (en) | Air intake system of internal combustion engine | |
| JPH04365968A (en) | Fuel supply device of internal combustion engine | |
| JPS58204958A (en) | Fuel feed device for internal-combustion engine | |
| JPH0494456A (en) | Fuel injecting internal combustion engine | |
| JPS62142852A (en) | Carburetor |