JPH0342067A - Ultrasonic injection valve - Google Patents
Ultrasonic injection valveInfo
- Publication number
- JPH0342067A JPH0342067A JP12121989A JP12121989A JPH0342067A JP H0342067 A JPH0342067 A JP H0342067A JP 12121989 A JP12121989 A JP 12121989A JP 12121989 A JP12121989 A JP 12121989A JP H0342067 A JPH0342067 A JP H0342067A
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- horn
- injection valve
- ultrasonic
- surface part
- 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
- 238000002347 injection Methods 0.000 title claims description 43
- 239000007924 injection Substances 0.000 title claims description 43
- 239000000446 fuel Substances 0.000 claims abstract description 51
- 241001669679 Eleotris Species 0.000 claims description 6
- 239000007921 spray Substances 0.000 abstract description 20
- 239000007788 liquid Substances 0.000 description 32
- 238000000889 atomisation Methods 0.000 description 14
- 238000002485 combustion reaction Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 239000010408 film Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000003905 agrochemical Substances 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000645 desinfectant Substances 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 239000011344 liquid material Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 239000000825 pharmaceutical preparation Substances 0.000 description 1
- 229940127557 pharmaceutical product Drugs 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 239000006200 vaporizer Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B17/00—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
- B05B17/04—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods
- B05B17/06—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations
- B05B17/0607—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers
- B05B17/0623—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers coupled with a vibrating horn
Landscapes
- Fuel-Injection Apparatus (AREA)
- Special Spraying Apparatus (AREA)
Abstract
Description
【発明の詳細な説明】
[産業上の利用分野コ
本発明は、自動車、船外機、携帯用動力装置、民生用ヒ
ートポンプ装置の駆動装置等に用いられる内燃機関に適
用される超音波噴射弁に関し、また、本発明は、(0ガ
スタービン用燃料噴射ノズル、(2)工業用、営業用及
び家庭用のボイラ、加熱炉、暖房用バーナ、(3)工業
用液体噴霧器、例えば食品、医薬品、農薬、把料等の液
状物の乾燥を目的とする乾燥用噴霧器、調温、調湿用ス
プレー、焼粉用噴霧器(セラミック造粒)、噴霧塗装装
置、反応促進器、及び(4)工業用以外の液体噴霧器、
例えば、農薬散布器、消毒液散布器等に好適に用いられ
る超音波噴射弁に関する。[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to an ultrasonic injection valve applied to internal combustion engines used in automobiles, outboard motors, portable power units, drive devices for consumer heat pump devices, etc. The present invention also relates to (0) fuel injection nozzles for gas turbines, (2) industrial, commercial and domestic boilers, heating furnaces, and heating burners, (3) industrial liquid sprayers, such as food and pharmaceutical products. , drying sprayers for drying liquid materials such as agricultural chemicals and powders, temperature control and humidity control sprays, baked powder sprayers (ceramic granulation), spray coating equipment, reaction accelerators, and (4) industry. Liquid sprayers other than those for
For example, the present invention relates to an ultrasonic injection valve suitable for use in pesticide sprayers, disinfectant sprayers, and the like.
[従来の技術]
ガソリンエンジン、ディーゼルエンジン等の内燃機関に
おいては、供給される液体燃料を燃焼させる際、燃焼性
能および排気特性の観点から見て、この液体燃料を極め
て小さい液滴粒径に霧化し、空気と混合して吸気管内に
供給することが望ましい。第4図は超音波噴射弁を使用
した火花点火エンジンの断面図を示し、21はシリンダ
、22はコンロラド、23はピストン、24は燃焼室、
25は吸気管、2Bは吸気弁、27は排気管、28は排
気弁である。吸気管25の所定位置には、超音波霧化装
置29と燃料噴射弁30を固定した取付体31が配設さ
れ、超音波霧化装置!29の先端に設けられた振動子3
2が吸気弁26に対向して配置されている。そして、燃
料噴射弁30の燃料供給路33から振動子32に燃料が
供給され、ここで燃料を微粒化し吸気管25内に噴霧し
ている。[Prior Art] In internal combustion engines such as gasoline engines and diesel engines, when the supplied liquid fuel is combusted, it is necessary to atomize the liquid fuel into extremely small droplet sizes from the viewpoint of combustion performance and exhaust characteristics. It is desirable to mix it with air and supply it into the intake pipe. FIG. 4 shows a cross-sectional view of a spark ignition engine using an ultrasonic injection valve, in which 21 is a cylinder, 22 is a contorrad, 23 is a piston, 24 is a combustion chamber,
25 is an intake pipe, 2B is an intake valve, 27 is an exhaust pipe, and 28 is an exhaust valve. A mounting body 31 to which an ultrasonic atomizer 29 and a fuel injection valve 30 are fixed is arranged at a predetermined position of the intake pipe 25, and the ultrasonic atomizer! Vibrator 3 installed at the tip of 29
2 is arranged facing the intake valve 26. Then, fuel is supplied from the fuel supply path 33 of the fuel injection valve 30 to the vibrator 32, where the fuel is atomized and sprayed into the intake pipe 25.
従来、液体燃料を微粒化させるための超音波噴射弁は、
液を複数の孔から霧化面に供給する方式の超音波噴射弁
や液を全周から霧化面に供給する方式の超音波噴射弁が
知られている。Conventionally, ultrasonic injection valves for atomizing liquid fuel are
2. Description of the Related Art Ultrasonic injection valves that supply liquid to an atomizing surface from a plurality of holes and ultrasonic injection valves that supply liquid to an atomizing surface from all around the circumference are known.
第5図は液を複数の孔から霧化面に供給する方式の多孔
式超音波噴射弁を示し、シリンダ101、ノズル体10
2、振動子ホーン103、電気・音響変換素子104か
らなり、シリンダ101には、燃料供給路105が形成
され、ノズル体102には、該燃料供給路105に連通
する噴射孔lO6が形成されている。噴射孔10Bは、
ノズル体102の円周上に複数個形成され、噴射孔10
Bから噴射される燃料が、振動子ホーン103に供給さ
れ燃料を微粒化するものである。FIG. 5 shows a multi-hole ultrasonic injection valve that supplies liquid to the atomizing surface from a plurality of holes, including a cylinder 101 and a nozzle body 10.
2. Consisting of a vibrator horn 103 and an electro-acoustic transducer 104, a fuel supply passage 105 is formed in the cylinder 101, and an injection hole lO6 communicating with the fuel supply passage 105 is formed in the nozzle body 102. There is. The injection hole 10B is
A plurality of injection holes 10 are formed on the circumference of the nozzle body 102.
The fuel injected from B is supplied to the vibrator horn 103 to atomize the fuel.
また、第6図は液を複数の孔から霧化面に供給する方式
の円環式超音波噴射弁を示し、アウターシリンダ111
、インナーシリンダ112、振動子ホーン113、電気
・音響変換素子114からなり、アウターシリンダ11
1とインナーシリンダ112間に燃料供給路115が形
成され、燃料はアウターシリンダ111の全周から振動
子ホーン113に供給され燃料を微粒化するものである
。Furthermore, FIG. 6 shows an annular type ultrasonic injection valve that supplies liquid to the atomizing surface from a plurality of holes, and the outer cylinder 111
, an inner cylinder 112, a vibrator horn 113, an electric/acoustic transducer 114, and an outer cylinder 11.
A fuel supply path 115 is formed between the outer cylinder 111 and the inner cylinder 112, and fuel is supplied from the entire circumference of the outer cylinder 111 to the vibrator horn 113 to atomize the fuel.
ところで、この種の超音波噴射弁においては、広い燃料
供給範囲にわたって良好な霧化効率を確保するためには
、振動子の霧化面上に液の薄膜を均一に形成することが
必須である。また、供給された燃料を全量霧化するため
に、供給燃料の速度が高速になっても霧化面上で跳ね飛
ばされないことも重要である。By the way, in this type of ultrasonic injection valve, in order to ensure good atomization efficiency over a wide fuel supply range, it is essential to uniformly form a thin film of liquid on the atomization surface of the vibrator. . Furthermore, in order to atomize the entire amount of the supplied fuel, it is important that the supplied fuel is not blown away on the atomization surface even if the speed of the supplied fuel becomes high.
しかしながら、上記多孔式超音波噴射弁においては、霧
化量が噴射孔106から供給される量によってきまるた
め、最大霧化量と最小霧化量の比を示すターンダウン比
が大きくとれず、また、横向きにした場合噴射孔108
に液体を均一に分配することが困難であるため、噴霧が
不均一になるという問題を有している。さらに、燃料を
均一に分配するために噴射孔108の数を増加させよつ
としても限界があり、また、噴射孔106の加工が困難
で製造コストが増大するという問題を有している。However, in the above-mentioned multi-hole ultrasonic injection valve, the amount of atomization is determined by the amount supplied from the injection hole 106, so the turndown ratio, which indicates the ratio between the maximum amount of atomization and the minimum amount of atomization, cannot be set large. , when placed horizontally, the injection hole 108
The problem is that it is difficult to distribute the liquid evenly, resulting in uneven spraying. Furthermore, there is a limit to increasing the number of injection holes 108 in order to uniformly distribute the fuel, and there is also the problem that machining of the injection holes 106 is difficult, increasing manufacturing costs.
また、上記円環式超音波噴射弁においては、アウターシ
リンダ111の先端と振動子ホーン113との間のクリ
アランス116によって霧化量が決まるため、アウター
シリンダ111と振動子ホーン113の鍔部113aと
の取付精度が要求され、製造コストが増大するという問
題を有している。また、このクリアランスtteの精度
が低い場合には、ターンダウン比が大きくとれないと共
に、噴霧が不均一になるという問題を有している。Furthermore, in the annular type ultrasonic injection valve, the amount of atomization is determined by the clearance 116 between the tip of the outer cylinder 111 and the vibrator horn 113. The problem is that mounting accuracy is required, which increases manufacturing costs. Furthermore, if the accuracy of this clearance tte is low, there are problems in that a large turndown ratio cannot be obtained and the spray becomes non-uniform.
さらに、上記従来の方式では、超音波噴射弁による霧化
燃料の噴霧角θが大きくなり、比較的径の小さい吸気管
の内壁に燃料が付着するという問題を有している。Furthermore, the conventional system described above has a problem in that the spray angle θ of the atomized fuel by the ultrasonic injection valve becomes large, and the fuel adheres to the inner wall of the intake pipe, which has a relatively small diameter.
本発明の目的は、上記問題および課題を解決するもので
あって、超音波噴射弁の振動子先端形状を改良して、供
給燃料の量に拘らず噴霧角を適正にすることができると
共に、ターンダウン比が大きくとれ、均一な全周状噴霧
が得られる超音波噴射弁を提供することである。An object of the present invention is to solve the above-mentioned problems and problems, and by improving the shape of the tip of the vibrator of an ultrasonic injection valve, it is possible to make the spray angle appropriate regardless of the amount of fuel supplied, and to It is an object of the present invention to provide an ultrasonic injection valve that has a large turndown ratio and can provide uniform spray all around the circumference.
そのために本発明の超音波噴射弁は、振動子ホーン10
と、tldB動子ホーン10の外周に配置され振動子ホ
ーン10の全周にわたって燃料を供給するためのスリー
プ8とを有し、前記振動子ホーン10の先端には、拡径
部10a1 傾斜面部10bおよび縮径部10cが形成
され、該傾斜面部1obに対向してスリープの開口部9
cを配置することを特徴とする。For this purpose, the ultrasonic injection valve of the present invention has a vibrator horn 10.
and a sleeper 8 disposed on the outer periphery of the tldB transducer horn 10 for supplying fuel over the entire circumference of the transducer horn 10. At the tip of the transducer horn 10, an enlarged diameter portion 10a1 and an inclined surface portion 10b are provided. and a reduced diameter portion 10c are formed, and an opening 9 of the sleeve is formed opposite to the inclined surface portion 1ob.
It is characterized by arranging c.
なお、上記構成に付加した番号は図面と対比させるため
のものであり、これにより本発明の構成が何ら限定され
るものではない。Note that the numbers added to the above configurations are for comparison with the drawings, and the configurations of the present invention are not limited thereby.
本発明においては、例えば、第1図および第2図に示す
ように、液体燃料は、円周溝5b1 通路9a1 傾斜
通路9b、 開口部9cを、それぞれ、通過して霧化
面4に到達する。その際、液体燃料は円周溝5bの全周
を通って開口部8c及び傾斜面部10bの全周に供給さ
れることになるので、その過程で、液体燃料は、概略的
に均一な膜厚にされて、傾斜面部10bに到達する。傾
斜面部10bに到達した液体燃料は、超音波振動発生部
2からの超音波振動により霧化されると共に、ここで霧
化しきれなかった燃料は、スムースに縮径部10cに流
れてここで全量が霧化され、噴霧角αで噴霧されること
になる。In the present invention, for example, as shown in FIGS. 1 and 2, the liquid fuel passes through the circumferential groove 5b1, the passage 9a1, the inclined passage 9b, and the opening 9c, respectively, and reaches the atomization surface 4. . At that time, the liquid fuel passes through the entire circumference of the circumferential groove 5b and is supplied to the entire circumference of the opening 8c and the inclined surface section 10b, so that in the process, the liquid fuel is distributed with a generally uniform film thickness. and reaches the inclined surface portion 10b. The liquid fuel that has reached the inclined surface part 10b is atomized by the ultrasonic vibrations from the ultrasonic vibration generating part 2, and the fuel that cannot be atomized here smoothly flows to the reduced diameter part 10c where the entire amount is is atomized and sprayed at a spray angle α.
以上説明した事項は、内燃機関の燃料の超音波霧化に関
するものであるが、本発明は、前記した如き技術分野に
適用できるので、内燃機関に適用される超音波噴射弁に
限定されるものでないことは明かである。Although the matters explained above relate to ultrasonic atomization of fuel for internal combustion engines, the present invention is applicable to the technical fields as described above, and is therefore limited to ultrasonic injection valves applied to internal combustion engines. It is clear that it is not.
以下、本発明の実施例を図面を参照しつつ説明する。第
1図は本発明の超音波噴射弁の1実施例を示す要部断面
図、第2図は本発明の超音波噴射弁の1実施例を示す全
体断面図、第3図は第2図の■−■線に沿ろ断面図であ
る。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view of essential parts showing one embodiment of the ultrasonic injection valve of the present invention, FIG. 2 is an overall sectional view showing one embodiment of the ultrasonic injection valve of the present invention, and FIG. It is a sectional view taken along the line ■-■.
第2図および第3図において、本発明の超音波噴射弁1
は、基部に超音波振動を発するための超音波振動発生部
2を備え、この超音波振動発生部2には、振動子軸部3
および振動子ホーン10が連結され、その先端部に霧化
面4が形成されている。2 and 3, the ultrasonic injection valve 1 of the present invention
is equipped with an ultrasonic vibration generating section 2 for emitting ultrasonic vibrations at the base, and this ultrasonic vibration generating section 2 includes a transducer shaft section 3.
and a vibrator horn 10 are connected, and an atomizing surface 4 is formed at the tip thereof.
振動子軸部3の外周には、これを囲包するように略環状
のスリープ部材5が配設され、スリープ部材5の先端部
分5aの外周には、先端部分5aの外径よりも、やや大
きい内径を有した環状のケーシング部材6が固定され、
スリープ部材5の先端部分5aとケーシング部材6との
間にスリープ9を形成している。更に、スリープ部材5
とケーシング部材6の先端部は先細りに形成され、した
がって、スリープ部材5の先端部分5aの外周面とケー
シング部材eの内周面との間には、環状の通路9a1
傾斜通路9bおよび開口部9cが形成されることになる
。なお、スリープ部材5は、その外周面上の好適位置に
円周溝5bが半径方向に全周にわたって設けられており
、ケーシング部材8には、好適位置に液体燃料供給口8
aが設けられており、この液体燃料供給口6aは、円周
溝5b及び通路9aと連通している。A substantially annular sleep member 5 is disposed on the outer circumference of the vibrator shaft portion 3 so as to surround it, and the outer circumference of the tip portion 5a of the sleep member 5 has a diameter slightly larger than the outer diameter of the tip portion 5a. An annular casing member 6 having a large inner diameter is fixed,
A sleeve 9 is formed between the tip portion 5a of the sleeve member 5 and the casing member 6. Furthermore, the sleep member 5
The distal end portion of the casing member 6 is tapered, and therefore, there is an annular passage 9a1 between the outer circumferential surface of the distal end portion 5a of the sleep member 5 and the inner circumferential surface of the casing member e.
An inclined passage 9b and an opening 9c will be formed. The sleep member 5 is provided with a circumferential groove 5b at a suitable position on its outer peripheral surface over the entire circumference in the radial direction, and the casing member 8 is provided with a liquid fuel supply port 8 at a suitable position.
a is provided, and this liquid fuel supply port 6a communicates with the circumferential groove 5b and the passage 9a.
ケーシング部材6の液体燃料供給口6aには、燃料噴射
弁から液体燃料が供給され、スリープ部材5の円周溝5
bの全周にわたって供給される。Liquid fuel is supplied from the fuel injection valve to the liquid fuel supply port 6a of the casing member 6, and the circumferential groove 5 of the sleep member 5
It is supplied over the entire circumference of b.
円周溝5bに供給された液体燃料は、通路9as傾斜通
路9bを通って開口部9cに至り、霧化面4に到達する
。霧化面4に至った液体燃料は、超音波振動発生部2か
らの超音波振動によって霧化される。The liquid fuel supplied to the circumferential groove 5b passes through the passage 9as and the inclined passage 9b, reaches the opening 9c, and reaches the atomization surface 4. The liquid fuel that has reached the atomization surface 4 is atomized by ultrasonic vibrations from the ultrasonic vibration generator 2 .
第1図は、上記超音波噴射弁1のスリープ9および振動
子ホーン10の先端形状を示す断面図である。振動子ホ
ーン10の先端には、拡径部10a1 傾斜面部10b
および縮径部10cが形成されている。前記拡径部10
aは霧化面積を増大させる働きをしている。前記傾斜面
部10bは、振動子10の軸に対して角度βをなすよう
に、また、縮径部10cは振動子10の軸に対して角度
γをなすように形成される。本発明における振動子ホー
ン10には、拡径部10aを設けることを特徴の一つと
しているが、これは噴射液体の流量を増大させる効果を
確保するためで、大流量を確保する必要がない場合には
、特に拡径部10aを設ける必要がなく、同一径のもの
でも差し支えがない。FIG. 1 is a sectional view showing the shape of the tip of the sleeper 9 and the vibrator horn 10 of the ultrasonic injection valve 1. As shown in FIG. At the tip of the vibrator horn 10, an enlarged diameter portion 10a1 and an inclined surface portion 10b are provided.
and a reduced diameter portion 10c are formed. Said enlarged diameter part 10
a functions to increase the atomization area. The inclined surface portion 10b is formed at an angle β with respect to the axis of the vibrator 10, and the reduced diameter portion 10c is formed at an angle γ with respect to the axis of the vibrator 10. One of the features of the vibrator horn 10 of the present invention is that it is provided with an enlarged diameter portion 10a, but this is to ensure the effect of increasing the flow rate of the injected liquid, and there is no need to ensure a large flow rate. In this case, there is no particular need to provide the enlarged diameter portion 10a, and there is no problem in providing the enlarged diameter portion 10a.
各部の寸法の1例を下記に示す。なお、振動子ホーン1
0の拡径部10aの直径をD :9 關、傾斜面部10
bの軸方向長さをl、:0.5mmとする。L/Dは1
/10〜1/30であり、好適には1/18程度である
。An example of the dimensions of each part is shown below. In addition, the vibrator horn 1
The diameter of the enlarged diameter part 10a of 0 is D: 9, the inclined surface part 10
Let the axial length of b be l: 0.5 mm. L/D is 1
/10 to 1/30, preferably about 1/18.
■噴霧角αは、300〜45°とする。その理由は、エ
ンジンに超音波噴射弁を搭載した場合、吸気管の内壁に
燃料が付着しない噴霧角とするのは重要であるが、エア
ーとのミキシング効果を上げるためにある程度広くする
ことも必要であるからである。■The spray angle α is 300 to 45°. The reason for this is that when an engine is equipped with an ultrasonic injection valve, it is important to set the spray angle so that the fuel does not adhere to the inner wall of the intake pipe, but it is also necessary to set the spray angle to a certain extent to improve the mixing effect with the air. This is because.
■スリープ9の先端と傾斜面部10bの角度βは、噴霧
される燃料が飛ばされず且つ霧化面に乗りやすい角度で
ある5@〜45@、好適には16°程度である。(2) The angle β between the tip of the sleeper 9 and the inclined surface portion 10b is 5 to 45 degrees, preferably about 16 degrees, which is an angle at which the atomized fuel is not blown away and easily rides on the atomization surface.
■縮径部10cの軸中心に対する角度γは、06〜90
″で、好適には40″〜50°である。第1図(b)は
γ=90°の例を示し、(C)はγ=01の例を示して
いる。噴霧角αは角度γが小さくなると広がり、角度γ
が大きくなると狭くなる方向に働く。■Angle γ of the reduced diameter portion 10c with respect to the axial center is 06 to 90
'', preferably 40'' to 50°. FIG. 1(b) shows an example where γ=90°, and FIG. 1(C) shows an example where γ=01. The spray angle α becomes wider as the angle γ becomes smaller, and the spray angle α becomes wider as the angle γ becomes smaller.
When becomes large, it works in the direction of narrowing.
■スリープ9の開口部9c及び振動子ホーン10の拡径
部10aとの間隔D1の上限及び下限は、0.05■〜
0゜Smm、好適には0.i目〜0.2l−(D+/D
=0.01〜0.02)とする。その理由は、下限以下
ではスリープ9の先端と振動子ホーン10の間隔が狭す
ぎて接触するおそれがあり、上限以上になってくると、
液の流量、圧力が少ない場合に液が傾斜面部10bの面
に到達せずに、ぼた落ちしてしまう。■The upper and lower limits of the distance D1 between the opening 9c of the sleeper 9 and the enlarged diameter portion 10a of the vibrator horn 10 are 0.05■~
0°Smm, preferably 0. i-th~0.2l-(D+/D
=0.01~0.02). The reason is that below the lower limit, the distance between the tip of the sleeper 9 and the vibrator horn 10 is too narrow and there is a risk of them coming into contact;
When the flow rate and pressure of the liquid are low, the liquid drips without reaching the surface of the inclined surface portion 10b.
■スリープ9の開口部9cと拡径部8aとの距離り、は
、0−0.5關(L+/L=0〜1)とする。距離L1
を小さくシ、開口9Cを拡径部10aの方にもっていく
と、液膜形成しにくくなり、また、縮径部10c側にも
うていくと入射角がマイナス側となり、液は突き抜けて
しまう。(2) The distance between the opening 9c of the sleeve 9 and the enlarged diameter portion 8a is 0-0.5 (L+/L=0 to 1). Distance L1
If the aperture 9C is made smaller and the opening 9C is moved toward the enlarged diameter portion 10a, it becomes difficult to form a liquid film, and if it is moved toward the reduced diameter portion 10c, the incident angle becomes negative and the liquid penetrates through.
第1図(d)は本発明の他の実施例を示し、縮径部10
cを2段構造10c 10c’にした例である。ま
た、第1図(e)は本発明のさらに他の実施例を示し、
振動子ホーン10の先端部10eを切削加工して、傾斜
面部及び縮径部に連続して曲率Rを形成した例である。FIG. 1(d) shows another embodiment of the present invention, in which the reduced diameter part 10
This is an example in which c has a two-stage structure 10c 10c'. Further, FIG. 1(e) shows still another embodiment of the present invention,
This is an example in which the tip portion 10e of the vibrator horn 10 is cut to form a curvature R continuous to the inclined surface portion and the reduced diameter portion.
以上のよつな構成になる本発明の超音波噴射弁の作用に
ついて以下に述べる。The operation of the ultrasonic injection valve of the present invention having the above-described structure will be described below.
液体燃料は、円周溝5c、 通路9a1 傾斜通路9b
、 開口部9cを、それぞれ、通過して霧化面4に到
達する。その際、液体燃料は円周溝5cの全周を通って
開口部9c及び傾斜面部10bの全周に供給されること
になるので、その過程で、液体燃料は、概略的に均一な
膜厚にされて、傾斜面部10bに到達する。傾斜面部1
0bに到達した液体燃料は、超音波振動発生部2からの
超音波振動により霧化されると共に、ここで霧化しきれ
なかった燃料は、スムースに縮径部10cに流れてここ
で全量が霧化され、噴霧角αで噴霧されることになる。The liquid fuel is distributed through the circumferential groove 5c, the passage 9a1, and the inclined passage 9b.
, respectively, and reach the atomization surface 4 through the openings 9c. At this time, the liquid fuel passes through the entire circumference of the circumferential groove 5c and is supplied to the entire circumference of the opening 9c and the inclined surface portion 10b, so that in the process, the liquid fuel is distributed with a generally uniform film thickness. and reaches the inclined surface portion 10b. Inclined surface part 1
The liquid fuel that has reached 0b is atomized by the ultrasonic vibrations from the ultrasonic vibration generating section 2, and the fuel that cannot be atomized here smoothly flows to the reduced diameter section 10c where the entire amount is atomized. and will be sprayed at a spray angle α.
なお、本発明は上記実施例に限定されるものではなく種
々の変更が可能である。Note that the present invention is not limited to the above-mentioned embodiments, and various modifications can be made.
以上のよろに本発明によれば、超音波噴射弁の振動子先
端形状を改良して供給液体の量に拘らず噴霧角を適正に
することが可能になると共に、ターンダウン比が大きく
とれ、均一な全周状噴霧が得られる。As described above, according to the present invention, it is possible to improve the shape of the tip of the vibrator of an ultrasonic injection valve to make the spray angle appropriate regardless of the amount of supplied liquid, and to obtain a large turndown ratio. Uniform all-around spray is obtained.
また、内燃機関に適用した場合には、超音波噴射弁の振
動子先端形状を改良して供給液体の量に拘らず噴霧角を
適正にすることが可能になり、吸気管の内壁に燃料が付
着することなしにシリンダ内に燃料を供給することがで
きると共に、ターンダウン比が大きくとれ、均一な全周
状噴霧が得られる超音波噴射弁を提供することができる
とともに、噴霧流量を増加させ通常運転時でも超音波霧
化装置による運転を可能とし、かつ、気化器を省略する
こともできるので機構が簡素化される。In addition, when applied to internal combustion engines, the shape of the tip of the vibrator of the ultrasonic injection valve is improved, making it possible to optimize the spray angle regardless of the amount of supplied liquid, which allows the fuel to reach the inner wall of the intake pipe. It is possible to provide an ultrasonic injection valve that can supply fuel into a cylinder without adhesion, has a large turndown ratio, and can obtain uniform all-around spray, and can increase the spray flow rate. It is possible to operate the ultrasonic atomizer even during normal operation, and the vaporizer can be omitted, which simplifies the mechanism.
第1図(a)、(b)、(c)、(d)、(e)は本発
明の超音波噴射弁の各実施例を示す要部断面図、第2図
は本発明の超音波噴射弁の1実施例を示す全体断面図、
第3図は第2図の■−■線に沿う断面図、第4図は本発
明が適用されるエンジンの断面図、第5図および第6図
は従来の超音波噴射弁の断面図である。
1・・・超音波噴射弁、9・・・スリープ、10・・・
振動子ホーン、10a・・・拡径部、10b・・・傾斜
面部、・10c・・・縮径部。FIGS. 1(a), (b), (c), (d), and (e) are sectional views of essential parts showing each embodiment of the ultrasonic injection valve of the present invention, and FIG. An overall sectional view showing one embodiment of an injection valve,
FIG. 3 is a sectional view taken along the line ■-■ in FIG. 2, FIG. 4 is a sectional view of an engine to which the present invention is applied, and FIGS. 5 and 6 are sectional views of a conventional ultrasonic injection valve. be. 1... Ultrasonic injection valve, 9... Sleep, 10...
Vibrator horn, 10a... enlarged diameter part, 10b... inclined surface part, 10c... reduced diameter part.
Claims (2)
れ振動子ホーンの全周にわたって燃料を供給するための
スリープとを有し、前記振動子ホーンの先端には、傾斜
面部および該傾斜面部より小径の縮径部が形成され、前
記傾斜面部に対向してスリープの開口部を配置すること
を特徴とする超音波噴射弁。(1) It has a vibrator horn and a sleeper disposed on the outer periphery of the vibrator horn for supplying fuel over the entire circumference of the vibrator horn, and the tip of the vibrator horn has an inclined surface portion and the inclined surface portion. An ultrasonic injection valve characterized in that a reduced diameter portion is formed with a smaller diameter than the surface portion, and a sleep opening is disposed opposite to the inclined surface portion.
より小径のおよび該傾斜面部より小径の縮径部が形成さ
れることを特徴とする請求項1に記載の超音波噴射弁。(2) The ultrasonic wave according to claim 1, wherein the tip of the vibrator horn is formed with an enlarged diameter part, a reduced diameter part smaller in diameter than the enlarged diameter part, and smaller in diameter than the inclined surface part. injection valve.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12121989A JPH0342067A (en) | 1989-03-30 | 1989-05-15 | Ultrasonic injection valve |
US07/501,988 US4986248A (en) | 1989-03-30 | 1990-03-29 | Fuel supply system for internal combustion engine using an ultrasonic atomizer |
DE9090303474T DE69001084T2 (en) | 1989-03-30 | 1990-03-30 | FUEL SUPPLY SYSTEM FOR AN INTERNAL COMBUSTION ENGINE WITH ULTRASONIC SPRAYING. |
EP90303474A EP0390603B1 (en) | 1989-03-30 | 1990-03-30 | Fuel supply system for internal combustion engine using an ultrasonic atomizer |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7971089 | 1989-03-30 | ||
JP1-79710 | 1989-03-30 | ||
JP12121989A JPH0342067A (en) | 1989-03-30 | 1989-05-15 | Ultrasonic injection valve |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0342067A true JPH0342067A (en) | 1991-02-22 |
Family
ID=26420711
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12121989A Pending JPH0342067A (en) | 1989-03-30 | 1989-05-15 | Ultrasonic injection valve |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0342067A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007297201A (en) * | 2006-05-02 | 2007-11-15 | Asuka:Kk | Paper feeder for offset color printing machine, nonwoven fabric sheet article to which color printing is applied, and article part or all of which is formed of nonwoven fabric sheet to which color printing is applied |
-
1989
- 1989-05-15 JP JP12121989A patent/JPH0342067A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007297201A (en) * | 2006-05-02 | 2007-11-15 | Asuka:Kk | Paper feeder for offset color printing machine, nonwoven fabric sheet article to which color printing is applied, and article part or all of which is formed of nonwoven fabric sheet to which color printing is applied |
JP4689529B2 (en) * | 2006-05-02 | 2011-05-25 | 株式会社飛鳥 | Paper feeding device for offset color printing machine and method for printing non-woven sheet using the same |
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