JPH0468465B2 - - Google Patents
Info
- Publication number
- JPH0468465B2 JPH0468465B2 JP55078967A JP7896780A JPH0468465B2 JP H0468465 B2 JPH0468465 B2 JP H0468465B2 JP 55078967 A JP55078967 A JP 55078967A JP 7896780 A JP7896780 A JP 7896780A JP H0468465 B2 JPH0468465 B2 JP H0468465B2
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- hole
- fuel injection
- end surface
- valve
- 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
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
- F02M69/041—Injectors peculiar thereto having vibrating means for atomizing the fuel, e.g. with sonic or ultrasonic vibrations
-
- 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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
- F02M61/1853—Orifice plates
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Description
【発明の詳細な説明】
本発明は、内燃機関に燃料を供給する燃料噴射
弁に係り、特に、超音波により燃料霧化を促進す
る構成の燃料噴射弁の構造に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fuel injection valve that supplies fuel to an internal combustion engine, and particularly to a structure of a fuel injection valve configured to promote fuel atomization using ultrasonic waves.
従来の燃料噴射弁のノズル先端部形状は、第１
図に示すように、吐出燃料量調節用のニードル・
バルブ１をノズル部２より突出させ、かつ、該バ
ルブ１の突出部３を保護するために、プロテクタ
４を設けている。このため、ニードル・バルブ１
の突出部３の最大形は、組立加工上、ノズル部２
の噴出孔５の孔径より小さくせざるを得ないの
で、燃料噴霧角拡大のためにバルブ突出部３に従
来設けているガイド６の角度にも自から限界があ
る。それらから燃料噴射をしても霧化効果が悪
く、燃料と空気との混合気体が不均等になつて、
エンジンの出力低下と運転状態の不安定性を生じ
る原因になつていた。ノズル部２とニードル・
バルブ１の先端部との間に燃料の不純物が付着
し、霧化性能低下の一因ともなつていた。 The nozzle tip shape of the conventional fuel injection valve is
As shown in the figure, the needle for adjusting the amount of discharged fuel
A protector 4 is provided to allow the valve 1 to protrude from the nozzle portion 2 and to protect the protruding portion 3 of the valve 1. For this reason, needle valve 1
The maximum shape of the protruding part 3 is the nozzle part 2 due to assembly processing.
Therefore, the angle of the guide 6 conventionally provided on the valve protrusion 3 in order to enlarge the fuel spray angle has its own limit. Even if fuel is injected from these sources, the atomization effect is poor and the mixture of fuel and air becomes uneven.
This caused a decrease in engine output and unstable operating conditions. Nozzle part 2 and needle
Fuel impurities were deposited between the valve 1 and the tip of the valve 1, contributing to a decrease in atomization performance.
本発明は、従来技術での上記した問題点を解決
して、エンジン出力の増加と運転性の向上を計る
べくなされたもので、噴射ノズル部に超音波利用
の燃料霧化促進装置を設ける構成とする場合に、
組立て性の良い簡易な構造で霧化効率を向上させ
ることのできる燃料噴射弁を提供することを目的
とするものである。 The present invention has been made to solve the above-mentioned problems with the conventional technology and to increase engine output and improve drivability.The present invention has a configuration in which a fuel atomization promoting device using ultrasonic waves is provided in the injection nozzle section. In this case,
The object of the present invention is to provide a fuel injection valve that has a simple structure that is easy to assemble and can improve atomization efficiency.
上記目的を達成するために、本発明では、第２
図に示すように、先端部に燃料噴出孔５′を有す
るノズル部２の内部に、吐出燃料量調節用のニー
ドル・バルブ１をその先端面が燃料噴出孔５′の
先端面より内側になるように配置し、燃料通過用
の中心孔１４を有する円板状の超音波振動子１０
と、この超音波振動子１０の円板部の外面周囲を
包囲する弾性体１１とから成る超音波振動発生装
置７を、上記ノズル部２の先端面の外側に、上記
中心孔１４の中心線が燃料噴出孔５′の中心線上
にあるように、ホルダ締結により取り付け、上記
中心孔１４は円板の内側端面の孔径が最小で外側
端面の孔径が最大となるようにラツパ状に形成し
て、このラツパ状部分を燃料が通過する間に超音
波により燃料霧化を促進する構成とする。 In order to achieve the above object, the present invention provides a second
As shown in the figure, a needle valve 1 for adjusting the amount of discharged fuel is installed inside a nozzle part 2 having a fuel injection hole 5' at its tip, so that its tip surface is inside the tip surface of the fuel injection hole 5'. A disk-shaped ultrasonic vibrator 10 is arranged as shown in FIG.
and an elastic body 11 that surrounds the outer surface of the disc portion of the ultrasonic vibrator 10. The ultrasonic vibration generator 7 is placed on the outside of the tip surface of the nozzle portion 2 along the center line of the center hole 14. It is attached by fastening the holder so that it is on the center line of the fuel injection hole 5', and the center hole 14 is formed in a round shape so that the hole diameter on the inner end surface of the disk is the smallest and the hole diameter on the outer end surface is the largest. The fuel atomization is promoted by ultrasonic waves while the fuel passes through this bumper-shaped portion.
以下、本発明の一実施例を第２図により説明す
る。ニードル・バルブ１の突出部３（第１図従来
例）を無くすことにより、第１図の噴出孔５に対
応する部分の噴出孔５′の孔径を大きく開けると
ともに、ノズル部２の外径部に超音波振動発生装
置７の固定用ねじ８を設ける。超音波振動発生装
置７は、噴出孔５′から吐出される燃料を通過さ
せる中心孔１４を有する円板状の超音波振動子１
０と、この超音波振動子１０の円板部の外面周囲
を包囲する弾性体１１とから成る。超音波振動子
１０は、その外側端面に環状突起９を有し、そし
て、中心孔１４は、環状突起９の外側端面の孔径
が最大で内側端面の孔径が最大になるようにラツ
パ状に形成し、このラツパ状部が第２のノズル部
１５を形成するようになつている。この超音波振
動発生装置７のノズル部２への取り付けは、超音
波振動子１０の円板部を包囲している弾性体１１
の内側端面をノズル部２の外側端面に、中心孔１
４の中心線が噴射孔５′の中心線上にあるように、
当接させ、その後、環状突起９の外径より若干大
き目の孔１２を底部にあけた袋ナツト１３の上述
の、ノズル部２の外径部に設けた固定用ねじ８に
螺合させて締結することにより、行われる。な
お、実施例では１３として袋ナツトを利用すると
したが、これは、一方の端面に孔１２をあけた円
筒体を締結用のホルダとして用いることができ
る。また、１６は超音波振動子１０のリード線を
示す。 An embodiment of the present invention will be described below with reference to FIG. By eliminating the protrusion 3 of the needle valve 1 (conventional example in FIG. 1), the hole diameter of the jet hole 5' corresponding to the jet hole 5 in FIG. A fixing screw 8 for the ultrasonic vibration generator 7 is provided. The ultrasonic vibration generator 7 includes a disk-shaped ultrasonic vibrator 1 having a center hole 14 through which fuel discharged from the jet hole 5' passes.
0, and an elastic body 11 surrounding the outer surface of the disk portion of the ultrasonic transducer 10. The ultrasonic transducer 10 has an annular projection 9 on its outer end surface, and the center hole 14 is formed in a round shape so that the outer end surface of the annular projection 9 has a maximum hole diameter and the inner end surface has a maximum hole diameter. However, this flap-shaped portion forms a second nozzle portion 15. The attachment of the ultrasonic vibration generator 7 to the nozzle section 2 is carried out using an elastic body 11 surrounding the disk section of the ultrasonic vibrator 10.
The inner end surface of the center hole 1 is placed on the outer end surface of the nozzle part 2.
4 is on the center line of the injection hole 5',
After that, a cap nut 13 having a hole 12 slightly larger than the outer diameter of the annular projection 9 at its bottom is screwed onto the above-mentioned fixing screw 8 provided on the outer diameter of the nozzle part 2 and fastened. It is done by doing. In the embodiment, a cap nut is used as 13, but a cylindrical body with a hole 12 formed in one end surface can be used as a fastening holder. Further, 16 indicates a lead wire of the ultrasonic transducer 10.
次に、第２図、第３図により本発明の作用を説
明する。燃料噴射時には、図示されていないソレ
ノイドが励磁されることによつて、ニードルバル
ブ１が図示（第２図）位置より僅かに右位置に変
位し、例えば2.55Kg／cm2（P1とする）に加圧され
た燃料は、ニードルバルブ１の先端部と、ノズル
部２と、超音波振動子１０の内側端面とによつて
形成される空間内に導入され、ここで超音波振動
子１０の内側端面に設けられている小さな孔径を
もつ孔によつて燃料通路を絞られ、圧力P2の外
部に導かれる。圧力P1とP2との大小関係は、P1
＞P2の関係にあるため、燃料の一部が拡散され、
超音波振動子１０の第２のノズル部１５の表面に
付着する。 Next, the operation of the present invention will be explained with reference to FIGS. 2 and 3. At the time of fuel injection, a solenoid (not shown) is energized, so that the needle valve 1 is slightly displaced to the right position from the illustrated (Fig. 2) position, for example, 2.55 kg/cm 2 (assumed to be P 1 ). The fuel pressurized to The fuel passage is narrowed by a hole with a small diameter provided on the inner end face, and is led to the outside at a pressure P 2 . The magnitude relationship between pressures P 1 and P 2 is P 1
>P 2 , so some of the fuel is diffused,
It adheres to the surface of the second nozzle section 15 of the ultrasonic transducer 10.
ここで、本発明における超音波振動子１０は、
第２図および第３図に示すように、中心孔１４が
ラツパ状に形成され、環状突起９の外側端面の孔
径が最大で内側端面の孔径が最小に形成され、こ
のラツパ状部が第２のノズル部１５を形成してい
る。超音波振動子１０を励振する超音波は、振動
数20KHz以上のものが使用されるが、上記のよう
に超音波振動子１０は先端に行くほどその体積が
小さくなるから、同一エネルギーで伝播していく
超音波の振幅は、第３図に示すように、先端にい
くほど大きいことになる。したがつて、第２のノ
ズル部１５の表面に燃料の油膜が供給されていれ
ば、第３図に拡大図を示すように、振幅が小さい
時は拡大図イとして示すように油膜はノズル部１
５の表面に付着状態にあるが、振幅が大きいと拡
大図ロとして示すように超音波の振動数に同期し
て生じるノズル部１５の急速な表面変形によつ
て、表面に付着した油膜が押し出されて、中心孔
１４から図示左方向に向けて噴射されることにな
る。このようにして、ノズル部１５の表面に付着
した燃料が効率良く微粒化されて外部に導かれ
る。 Here, the ultrasonic transducer 10 in the present invention is
As shown in FIGS. 2 and 3, the center hole 14 is formed in a tupular shape, and the hole diameter on the outer end surface of the annular protrusion 9 is the largest, and the hole diameter on the inner end surface is the smallest, and this lattice-shaped portion forms the second A nozzle portion 15 is formed. Ultrasonic waves with a frequency of 20 KHz or more are used to excite the ultrasonic vibrator 10, but as mentioned above, the volume of the ultrasonic vibrator 10 decreases toward the tip, so it propagates with the same energy. As shown in FIG. 3, the amplitude of the ultrasonic wave increases as it goes toward the tip. Therefore, if an oil film of fuel is supplied to the surface of the second nozzle part 15, as shown in the enlarged view in FIG. 1
However, when the amplitude is large, the rapid surface deformation of the nozzle part 15 that occurs in synchronization with the frequency of the ultrasonic waves pushes out the oil film that has adhered to the surface. As a result, the fuel is injected from the center hole 14 toward the left in the drawing. In this way, the fuel adhering to the surface of the nozzle portion 15 is efficiently atomized and guided to the outside.
本発明によれば、以下に述べる効果を発揮させ
ることができる。 According to the present invention, the following effects can be achieved.
(イ) ニードル・バルブの従来構造に備えていた突
出部を無くしたことでノズル部の燃料噴出孔の
孔径を従来より大きく開けることが可能とな
り、エンジン出力と運転性が向上する。(b) By eliminating the protruding part of the conventional needle valve structure, it is possible to open the fuel injection hole in the nozzle part to a larger diameter than before, improving engine output and drivability.
(ロ) 噴出孔の外側端面に円板状の超音波振動子を
弾性体を介して取り付け、この超音波振動子の
中心孔を、ラツパ状の第２のノズル部とする構
造であり、噴出孔からの噴射燃料は、第２のノ
ズル部を通過する際、超音波振動を受けて霧化
される構成であるので、第２のノズル部のラツ
パ形状により噴霧角が従来より大きくなり、切
替効率が向上し、かつ均等に噴霧されるように
なり、また第２のノズル部への不純物の付着が
防止できるようになり、エンジン出力と運転性
が一層向上する
(ハ) 超音波振動発生装置を袋ナツト形状のホルダ
によりノズル部の外側先端部に取り付ける構造
であるので、超音波振動発生装置の取り付け、
保守時の取り外しの操作性が良い。(b) A disk-shaped ultrasonic vibrator is attached to the outer end surface of the jet hole via an elastic body, and the center hole of this ultrasonic vibrator is a structure in which the second nozzle part is shaped like a flap, and the jet When the fuel injected from the hole passes through the second nozzle part, it is atomized by receiving ultrasonic vibrations, so the spray angle is larger than before due to the flap shape of the second nozzle part, making it easier to switch. Efficiency is improved and spray is evenly distributed, and impurities can be prevented from adhering to the second nozzle, further improving engine output and drivability (c) Ultrasonic vibration generator is attached to the outer tip of the nozzle part using a cap nut-shaped holder, so it is easy to attach the ultrasonic vibration generator,
Easy to remove for maintenance.
(ニ) 本発明により新しく追加される部分は、超音
波振動子と弾性体とホルダとであり、構造簡単
で低コストとすることができる。(d) The parts newly added by the present invention are the ultrasonic vibrator, the elastic body, and the holder, and the structure can be simple and low cost.
以上のように、本発明は、従来構造が持つてい
た多数の問題点を解決することができ、産業上、
省エネルギー上等、社会に益するところ極めて大
である。 As described above, the present invention can solve many problems that conventional structures had, and
The benefits to society, such as energy conservation, are extremely large.
第１図は従来構造を示す縦断面図、第２図は本
発明の一実施例を示す縦断面図、第３図は本発明
の作用を説明する図である。
＜符号の説明＞、１……ニードル・バルブ、２
……ノズル部、３……突起部、５、５′……燃料
噴出孔、７……超音波振動発生装置、８……固定
用ねじ、９……環状突起、１０……超音波振動
子、１１……弾性体、１２……孔、１３……袋ナ
ツト、１４……中心孔、１５……第２のノズル
部、１６……リード線。
FIG. 1 is a vertical sectional view showing a conventional structure, FIG. 2 is a vertical sectional view showing an embodiment of the present invention, and FIG. 3 is a diagram illustrating the operation of the present invention. <Explanation of symbols>, 1... Needle valve, 2
... Nozzle part, 3 ... Projection, 5, 5' ... Fuel injection hole, 7 ... Ultrasonic vibration generator, 8 ... Fixing screw, 9 ... Annular projection, 10 ... Ultrasonic vibrator , 11... Elastic body, 12... Hole, 13... Cap nut, 14... Center hole, 15... Second nozzle portion, 16... Lead wire.
Claims (1)
て、先端部に燃料噴出孔５′を有するノズル部２
の内部に、吐出燃料量調節用のニードル・バルブ
１をその先端面が燃料噴出孔５′の先端面より内
側になるように配置し、燃料通過用の中心孔１４
を有する円板状の超音波振動子１０と、この超音
波振動子１０の円板部の外面周囲を包囲する弾性
体１１とから成る超音波振動発生装置７を、上記
ノズル部２の先端面の外側に、上記中心孔１４の
中心線が燃料噴出孔５′の中心線上にあるように、
ホルダ締結により取り付け、上記中心孔１４は円
板の内側端面の孔径が最小で外側端面の孔径が最
大となるようにラツパ状に形成して、このラツパ
状部分を燃料が通過する間に超音波により燃料霧
化を促進する構成としたことを特徴とする燃料噴
射弁。1 In a fuel injection valve that supplies fuel to an internal combustion engine, a nozzle part 2 having a fuel injection hole 5' at the tip part
A needle valve 1 for adjusting the amount of discharged fuel is arranged inside the needle valve 1 so that its tip surface is inside the tip surface of the fuel injection hole 5', and a central hole 14 for fuel passage is disposed inside the needle valve 1 for adjusting the amount of discharged fuel.
The ultrasonic vibration generator 7, which is composed of a disk-shaped ultrasonic vibrator 10 having on the outside so that the center line of the center hole 14 is on the center line of the fuel injection hole 5',
It is attached by fastening the holder, and the center hole 14 is formed in a tupular shape so that the hole diameter on the inner end surface of the disk is the smallest and the hole diameter on the outer end surface is the largest. A fuel injection valve characterized by having a configuration that promotes fuel atomization.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7896780A JPS575545A (en) | 1980-06-13 | 1980-06-13 | Fuel injection valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7896780A JPS575545A (en) | 1980-06-13 | 1980-06-13 | Fuel injection valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS575545A JPS575545A (en) | 1982-01-12 |
| JPH0468465B2 true JPH0468465B2 (en) | 1992-11-02 |
Family
ID=13676667
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7896780A Granted JPS575545A (en) | 1980-06-13 | 1980-06-13 | Fuel injection valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS575545A (en) |
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5964113U (en) * | 1982-10-25 | 1984-04-27 | 別当 有光 | Prosthetic leg alignment adjustment device |
| JPS60501264A (en) * | 1983-05-13 | 1985-08-08 | ロ−ベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | Device that injects fuel into the combustion chamber |
| JPS6027727A (en) * | 1983-07-25 | 1985-02-12 | Isuzu Motors Ltd | Combustion chamber of diesel engine |
| DE3404709A1 (en) * | 1984-02-10 | 1985-08-14 | Robert Bosch Gmbh, 7000 Stuttgart | FUEL INJECTION NOZZLE FOR INTERNAL COMBUSTION ENGINES |
| JPH053740Y2 (en) * | 1985-08-31 | 1993-01-28 | ||
| JPS6354861U (en) * | 1986-09-30 | 1988-04-13 | ||
| JP2603292B2 (en) * | 1988-04-21 | 1997-04-23 | 株式会社日立製作所 | Fuel injection valve |
| JPH0269062U (en) * | 1988-11-15 | 1990-05-25 | ||
| JPH0486367A (en) * | 1990-07-30 | 1992-03-18 | Aisin Seiki Co Ltd | Fuel injection valve |
| US5330100A (en) * | 1992-01-27 | 1994-07-19 | Igor Malinowski | Ultrasonic fuel injector |
| US7819335B2 (en) | 2006-01-23 | 2010-10-26 | Kimberly-Clark Worldwide, Inc. | Control system and method for operating an ultrasonic liquid delivery device |
| US7963458B2 (en) | 2006-01-23 | 2011-06-21 | Kimberly-Clark Worldwide, Inc. | Ultrasonic liquid delivery device |
| US7810743B2 (en) | 2006-01-23 | 2010-10-12 | Kimberly-Clark Worldwide, Inc. | Ultrasonic liquid delivery device |
| US8028930B2 (en) | 2006-01-23 | 2011-10-04 | Kimberly-Clark Worldwide, Inc. | Ultrasonic fuel injector |
| US7735751B2 (en) | 2006-01-23 | 2010-06-15 | Kimberly-Clark Worldwide, Inc. | Ultrasonic liquid delivery device |
| US7424883B2 (en) | 2006-01-23 | 2008-09-16 | Kimberly-Clark Worldwide, Inc. | Ultrasonic fuel injector |
| US8191732B2 (en) | 2006-01-23 | 2012-06-05 | Kimberly-Clark Worldwide, Inc. | Ultrasonic waveguide pump and method of pumping liquid |
| US7744015B2 (en) | 2006-01-23 | 2010-06-29 | Kimberly-Clark Worldwide, Inc. | Ultrasonic fuel injector |
| KR100800175B1 (en) | 2007-04-16 | 2008-02-01 | 한국기계연구원 | Ultrasonic Injector |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53139014A (en) * | 1977-05-11 | 1978-12-05 | Nippon Denso Co Ltd | Fuel injection valve for internal combustion engine |
| JPS5453714A (en) * | 1977-10-06 | 1979-04-27 | Toyota Motor Corp | Internal combustion engine fuel injector |
-
1980
- 1980-06-13 JP JP7896780A patent/JPS575545A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS575545A (en) | 1982-01-12 |
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