JP2012122468A - Lpi injector - Google Patents

Lpi injector Download PDF

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JP2012122468A
JP2012122468A JP2011124838A JP2011124838A JP2012122468A JP 2012122468 A JP2012122468 A JP 2012122468A JP 2011124838 A JP2011124838 A JP 2011124838A JP 2011124838 A JP2011124838 A JP 2011124838A JP 2012122468 A JP2012122468 A JP 2012122468A
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injection
tip
housing
injection tube
fuel
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JP5813378B2 (en
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Jin Oh Song
珍 五 宋
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Hyundai Motor Co
Kia Corp
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Hyundai Motor Co
Kia Motors Corp
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    • 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
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • 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
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02M21/0248—Injectors
    • 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
    • F02M53/00—Fuel-injection apparatus characterised by having heating, cooling or thermally-insulating means
    • F02M53/04—Injectors with heating, cooling, or thermally-insulating means
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/30—Use of alternative fuels, e.g. biofuels

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a LPI injector that prevents LPG fuel from residing between an injection part and an injection tube, and prevents tar from adhering to the injection tube.SOLUTION: The LPI injector includes: the injection part for injecting fuel from one end to the other end after receiving a control from a LPI dedicated electronic device (not shown); a housing for enclosing the circumference of the injection part; an icing tip 300 bonded to the other end side of the housing, and having a tip penetration part 300a; the injection tube 400 communicating with the terminal end of the injection part, and provided by penetrating the tip penetration part 300a; and a tapered part 300b formed on the other end of the tip penetration part 300a.

Description

本発明は、ＬＰＩインジェクターに係り、より詳しくは、噴射部と噴射チューブとの間にＬＰＧ燃料が残留することが防止されたＬＰＩインジェクターに関する。   The present invention relates to an LPI injector, and more particularly to an LPI injector in which LPG fuel is prevented from remaining between an injection unit and an injection tube.

ＬＰＩ（Ｌｉｑｕｅｆｉｅｄ Ｐｅｔｒｏｌｅｕｍ Ｉｎｊｅｃｔｉｏｎ：ＬＰＧ液状燃料噴射）エンジンは、従来のボンベ（Ｂｏｍｂｅ）の圧力に依存する機械式ＬＰＧ燃料エンジンとは異なり、燃料ボンベ内に燃料ポンプを設け、燃料ポンプによってＬＰＧ燃料を５乃至１５ｂａｒの圧力で液化させ、液体となった燃料をインジェクター（Ｉｎｊｅｃｔｏｒ）を利用してエンジンの各気筒に噴射する技術（Ｍｏｎｏ−Ｆｕｅｌ方式）を用いるエンジンである（例えば特許文献１を参照）。   An LPI (Liquid Petroleum Injection: LPG liquid fuel injection) engine is different from a mechanical LPG fuel engine that depends on the pressure of a conventional bomb, and a fuel pump is provided in the fuel bomb, and the LPG fuel is supplied by the fuel pump. The engine uses a technology (Mono-Fuel system) in which fuel is liquefied at a pressure of 15 bar and injected into each cylinder of the engine using an injector (see, for example, Patent Document 1).

ＬＰＩエンジンは、液体燃料を噴射するので、従来のミキサー形式のＬＰＧエンジンで用いられたベーパライザ（Ｖａｐｏｒｉｚｅｒ）、ミキサー（Ｍｉｘｅｒ）等の構成部品は不要となった。その代わりとして、新しく装備される構成部品は、ＬＰＩインジェクター、ボンベに設けられる燃料ポンプ、燃料供給ライン、ＬＰＩ専用電子制御装置（ＥＣＵ）、及び燃料圧力を調節するレギュレーターユニットなどである。   Since the LPI engine injects liquid fuel, components such as a vaporizer and a mixer used in a conventional mixer type LPG engine are no longer necessary. Instead, the newly installed components are an LPI injector, a fuel pump provided in the cylinder, a fuel supply line, an LPI dedicated electronic control unit (ECU), and a regulator unit for adjusting fuel pressure.

これらの構成部品の中で、ＬＰＩ専用電子制御装置は、各種センサの入力信号を受信してエンジンの状態を判断し、最適の空燃比を得るため、及びエンジン性能を向上させるために、燃料ポンプ、インジェクター、及び点火コイルを制御する。そして、エンジンが要求する燃料量に応じて燃料ポンプを制御し、液状燃料をシリンダー別のＬＰＩインジェクターに順次に供給し、エンジンに噴射して最適の空燃比を実現する。   Among these components, the LPI dedicated electronic control unit receives the input signals of various sensors to determine the state of the engine, to obtain the optimum air-fuel ratio, and to improve the engine performance, the fuel pump Control the injector and ignition coil. Then, the fuel pump is controlled in accordance with the amount of fuel required by the engine, and liquid fuel is sequentially supplied to the LPI injectors for each cylinder and injected into the engine to realize an optimum air-fuel ratio.

従来のＬＰＩインジェクターは、噴射部と噴射チューブとの間に空隙部分が存在する。燃料を噴射する時に、燃料の一部がこの空隙で気化するとタール（Ｔａｒ）が発生し、このタールがＬＰＩインジェクターの空隙に付着して燃料噴射ホールを塞いで噴射障害を起こす可能性があった。また、タールの付着によって燃料の供給が不調になって、エンジン停止等の問題が発生する恐れがあるという問題があった。   In the conventional LPI injector, there is a gap portion between the injection unit and the injection tube. When fuel is injected, if a part of the fuel is vaporized in this gap, tar is generated, and this tar may adhere to the gap of the LPI injector and block the fuel injection hole, causing an injection failure. . Further, there is a problem that the supply of fuel becomes unsatisfactory due to adhesion of tar, which may cause problems such as engine stoppage.

特開２０１０−１３８８２８号公報JP 2010-138828 A

かかる問題を解決するためになされた本発明の目的は、噴射部と噴射チューブとの間にＬＰＧ燃料が残留することを防止し、噴射チューブにタールが付着するのが防止されたＬＰＩインジェクターを提供することにある。   An object of the present invention made to solve such problems is to provide an LPI injector that prevents LPG fuel from remaining between an injection portion and an injection tube and prevents tar from adhering to the injection tube. There is to do.

本発明の１実施例に係るＬＰＩインジェクターは、一端側から他端側に燃料を噴射する噴射部と、噴射部の外周を囲むハウジングと、ハウジングの他端側に結合され、チップ貫通部を有するアイシングチップと、噴射部の他端側と連通され、チップ貫通部を貫通して設けられる噴射チューブと、チップ貫通部の他端側にテーパ状に形成されたテーパ部と、を有することを特徴とする。   An LPI injector according to an embodiment of the present invention includes an injection unit that injects fuel from one end side to the other end side, a housing that surrounds the outer periphery of the injection unit, and a tip through portion that is coupled to the other end side of the housing. It has an icing tip, an injection tube that communicates with the other end side of the injection unit and is provided through the chip penetration part, and a taper part that is formed in a tapered shape on the other end side of the chip penetration part. And

また本発明は、噴射チューブの末端部の外縁が、チップ貫通部のテーパ部のテーパ面と当接する。
チップ貫通部のテーパ部の傾斜角は、チップ貫通部の中心軸を基準として１０±２度乃至２０±２度の範囲である。 Further, according to the present invention, the outer edge of the distal end portion of the spray tube comes into contact with the tapered surface of the tapered portion of the tip penetrating portion.
The inclination angle of the taper portion of the chip penetrating portion is in the range of 10 ± 2 degrees to 20 ± 2 degrees with respect to the central axis of the chip penetrating portion.

また本発明は、噴射チューブの末端部部の直径が、噴射チューブの中間部の直径より小さい。
また、ハウジングは、噴射チューブに貫通されるハウジング貫通部を有する。ハウジング貫通部はチップ貫通部と連通する。 Further, according to the present invention, the diameter of the end portion of the injection tube is smaller than the diameter of the intermediate portion of the injection tube.
Further, the housing has a housing penetration part that is penetrated by the injection tube. The housing penetrating portion communicates with the chip penetrating portion.

本発明のＬＰＩインジェクターによれば、チップ貫通部の他端側に噴射チューブの末端部と接触するテーパ部を設けることによって、噴射チューブの位置を一端側に移動させ、噴射部と噴射チューブとの密着部位を拡張することによって、噴射部と噴射チューブとの間の気密を緊密に維持し、空隙を最小化することができた。
噴射部と噴射チューブとの間の空隙を最小化したことによって噴射部と噴射チューブとの間にＬＰＧ燃料が残留しなくなったため、噴射部と噴射チューブとの間の空隙での燃料の気化がなくなり、タールの発生が防止されると共に、噴射チューブ他端部でのタールの固着を最小化して、噴射チューブがタールで塞がることを防止することができた。
また、タールが噴射部と噴射チューブとの間に付着しないので、別途の超音波洗浄が必要なくなった。 According to the LPI injector of the present invention, by providing a tapered portion that contacts the distal end portion of the injection tube on the other end side of the tip through portion, the position of the injection tube is moved to one end side, and the injection portion and the injection tube By expanding the close contact portion, the airtightness between the injection unit and the injection tube can be maintained tightly and the gap can be minimized.
Since the gap between the injection unit and the injection tube is minimized, LPG fuel does not remain between the injection unit and the injection tube, so there is no vaporization of fuel in the gap between the injection unit and the injection tube. Further, the generation of tar was prevented and the sticking of tar at the other end of the injection tube was minimized to prevent the injection tube from being blocked with tar.
In addition, since tar does not adhere between the spray section and the spray tube, separate ultrasonic cleaning is no longer necessary.

本発明の一実施形態に係るＬＰＩインジェクターの横断面図である。It is a cross-sectional view of the LPI injector which concerns on one Embodiment of this invention. 図１の噴射チューブとアイシングチップの分離拡大図である。（ａ）は噴射チューブの先端部分であり、（ｂ）はアイシングチップの拡大図である。FIG. 2 is a separated enlarged view of the spray tube and icing tip of FIG. 1. (A) is a front-end | tip part of an injection tube, (b) is an enlarged view of an icing chip | tip. 図１の、一点破線で囲ったＡ部分の拡大図である。FIG. 2 is an enlarged view of a portion A surrounded by a dashed line in FIG. 1.

以下に、図面を参照して本発明の実施の形態を詳細に記載する。
図１は、本発明の一実施形態に係るＬＰＩインジェクターの横断面図である。
図１に示すように、本発明の一実施形態に係るＬＰＩインジェクターは、ＬＰＩ専用電子制御装置（図示しない）の制御を受けて燃料を一端側から他端側に噴射する噴射部１００、噴射部１００の外周を囲むハウジング２００、ハウジング２００の他端側に連結されるアイシングチップ３００、及び一端側が噴射部１００の他端側に連通し他端側がアイシングチップ３００を貫通して設けられる噴射チューブ４００を有する。 Embodiments of the present invention will be described below in detail with reference to the drawings.
FIG. 1 is a cross-sectional view of an LPI injector according to an embodiment of the present invention.
As shown in FIG. 1, an LPI injector according to an embodiment of the present invention includes an injection unit 100 and an injection unit that inject fuel from one end side to the other end side under the control of an LPI dedicated electronic control device (not shown). A housing 200 that surrounds the outer periphery of the housing 100, an icing tip 300 that is connected to the other end of the housing 200, and an injection tube 400 that has one end communicating with the other end of the injection unit 100 and the other end passing through the icing tip 300. Have

噴射部１００の一端側には、電源供給及び信号受信のためのプラグ１０１が設けられる。噴射部１００の内部構造及び動作は公知なので詳細な説明は省略する。
ハウジング２００は、噴射部１００を収容するメインハウジング２１０と、メインハウジング２１０の一端側を覆いながら、噴射部１００をメインハウジング２１０に固定するカバー２２０と、を有する。 A plug 101 for power supply and signal reception is provided on one end side of the injection unit 100. Since the internal structure and operation of the injection unit 100 are well known, detailed description thereof is omitted.
The housing 200 includes a main housing 210 that houses the injection unit 100, and a cover 220 that fixes the injection unit 100 to the main housing 210 while covering one end side of the main housing 210.

メインハウジング２１０には、燃料供給部２１１と燃料リターン部２１２とが形成される。燃料は、燃料供給部２１１を通過してエンジンに噴射され、残った燃料は、燃料リターン部２１２を通じてボンベに回収される。
メインハウジング２１０の内部には噴射チューブ４００が貫通するハウジング貫通部２１０ａが形成されている。 A fuel supply part 211 and a fuel return part 212 are formed in the main housing 210. The fuel passes through the fuel supply unit 211 and is injected into the engine, and the remaining fuel is collected in a cylinder through the fuel return unit 212.
A housing through portion 210 a through which the injection tube 400 passes is formed inside the main housing 210.

メインハウジング２１０の側面に結合用フランジ２１３が突設される。結合用フランジ２１３を貫通して、内周面にネジ溝が刻設された結合孔が形成される。即ち、メインハウジング２１０は、結合用フランジ２１３及び結合孔によってエンジンのマニホールドに堅固に取付けられる。なお、結合孔は１個のみでも良く、メインハウジング２１０の周囲に沿って２個以上形成して組立強度を向上させても良い。
噴射部１００とハウジング２００との間にはシーリング（ｓｅａｌｉｎｇ）のためのＯリング２１４が設けられる。 A coupling flange 213 protrudes from the side surface of the main housing 210. A coupling hole is formed through the coupling flange 213 with a thread groove formed on the inner peripheral surface. That is, the main housing 210 is firmly attached to the engine manifold by the coupling flange 213 and the coupling hole. Note that only one coupling hole may be provided, and two or more coupling holes may be formed along the periphery of the main housing 210 to improve the assembly strength.
An O-ring 214 for sealing is provided between the injection unit 100 and the housing 200.

アイシングチップ３００は、熱エネルギーの供給を受けて噴射チューブ４００の一端側を加熱し、結氷を防止する。即ち、ＬＰＧ燃料が噴射チューブ４００を通じてマニホールドに噴射される時、ＬＰＧ燃料の気化熱によって湿気を含む空気が冷却され噴射チューブ４００の一端側に氷が生成する可能性がある。噴射チューブ４００の一端側を加熱して噴射チューブ４００の凍結を予防する。
アイシングチップ３００の内部に、メインハウジング２１０のハウジング貫通部２１０ａと連通して、噴射チューブ４００に貫通されるチップ貫通部３００ａが設けられる。 The icing chip 300 receives supply of heat energy and heats one end side of the spray tube 400 to prevent icing. That is, when LPG fuel is injected into the manifold through the injection tube 400, air containing moisture is cooled by the heat of vaporization of the LPG fuel, and ice may be generated on one end side of the injection tube 400. One end side of the spray tube 400 is heated to prevent the spray tube 400 from freezing.
Inside the icing tip 300, a tip penetration portion 300 a that communicates with the housing penetration portion 210 a of the main housing 210 and penetrates the injection tube 400 is provided.

図２は、図１の噴射チューブとアイシングチップの分離拡大図である。（ａ）は噴射チューブの先端部分であり、（ｂ）はアイシングチップの拡大図である。また、 図３は、図１の、一点破線で囲ったＡ部分の拡大図である。   FIG. 2 is a separated enlarged view of the spray tube and icing tip of FIG. (A) is a front-end | tip part of an injection tube, (b) is an enlarged view of an icing chip | tip. FIG. 3 is an enlarged view of a portion A surrounded by a dashed line in FIG.

図２（ａ）に示すように、噴射チューブ４００の末端には噴射孔４００ａが形成され、燃料が噴射孔４００ａからエンジン内に噴射される。
噴射チューブ４００の末端部４１０の直径（ｒ１）は、噴射チューブ４００の中間部４２０の直径（ｒ２）より小さく形成される。 As shown in FIG. 2A, an injection hole 400a is formed at the end of the injection tube 400, and fuel is injected into the engine from the injection hole 400a.
The diameter (r1) of the end portion 410 of the injection tube 400 is formed smaller than the diameter (r2) of the intermediate portion 420 of the injection tube 400.

図２（ｂ）に示すように、チップ貫通部３００ａの他端側にはテーパ状に形成されたテーパ部３００ｂが形成される。
噴射チューブ４００の末端部４１０の直径（ｒ１）を中間部４２０の直径（ｒ２）より小さく形成するのは、噴射チューブ４００の末端部４１０の外縁をチップ貫通部３００ａのテーパ部３００ｂのテーパ面と当接させるためである。 As shown in FIG. 2B, a tapered portion 300b formed in a tapered shape is formed on the other end side of the chip penetration portion 300a.
The diameter (r1) of the end portion 410 of the injection tube 400 is made smaller than the diameter (r2) of the intermediate portion 420 because the outer edge of the end portion 410 of the injection tube 400 is formed with the tapered surface of the tapered portion 300b of the tip through portion 300a. This is for contact.

チップ貫通部３００ａのテーパ部３００ｂの傾斜角（θ）は、チップ貫通部３００ａの中心軸（Ｙ）を基準として、１０±２度〜２０±２度とすることができる。
チップ貫通部３００ａのテーパ部３００ｂの傾斜角（θ）が、中心軸（Ｙ）を基準として１０±２度より小さい場合は、噴射チューブ４００の末端部４１０の外縁がチップ貫通部３００ａのテーパ部３００ｂのテーパ面と当接しないことがある。
図３に示すように、噴射チューブ４００の末端部４１０がチップ貫通部３００ａのテーパ部３００ｂと当接しない場合は、噴射チューブ４００が一端側に移動されないため、噴射部１００と噴射チューブ４００との間に空隙が発生しやすい。 The inclination angle (θ) of the taper portion 300b of the chip penetration portion 300a can be set to 10 ± 2 degrees to 20 ± 2 degrees with respect to the central axis (Y) of the chip penetration portion 300a.
When the inclination angle (θ) of the tapered portion 300b of the tip through portion 300a is smaller than 10 ± 2 degrees with respect to the central axis (Y), the outer edge of the end portion 410 of the injection tube 400 is the tapered portion of the tip through portion 300a. The taper surface of 300b may not come into contact.
As shown in FIG. 3, when the distal end portion 410 of the injection tube 400 does not contact the tapered portion 300 b of the tip through portion 300 a, the injection tube 400 is not moved to one end side. Voids are likely to occur between them.

また、チップ貫通部３００ａのテーパ部３００ｂの傾斜角（θ）が、中心軸（Ｙ）を基準にして２０±２度より大きい場合は、噴射チューブ４００の末端部４１０がチップ貫通部３００ａのテーパ部３００ｂの一端側と当接するため、噴射チューブ４００が一端側に移動し噴射部１００を押し出すため、メインハウジング２１０とアイシングチップ３００とがうまく結合しない場合がある。   Further, when the inclination angle (θ) of the taper portion 300b of the tip penetration portion 300a is larger than 20 ± 2 degrees with respect to the central axis (Y), the end portion 410 of the injection tube 400 is a taper of the tip penetration portion 300a. Since the injection tube 400 moves to one end side and pushes out the injection unit 100 because it contacts the one end side of the part 300b, the main housing 210 and the icing chip 300 may not be well coupled.

チップ貫通部３００ａの他端側に噴射チューブ４００の末端部４１０と接触するテーパ部３００ｂを形成し、噴射チューブ４００を所定距離だけ一端側に移動させることによって、噴射部１００と噴射チューブ４００とを密着させ、噴射部１００と噴射チューブ４００との間の気密を維持することができる。
噴射部１００と噴射チューブ４００との間の空隙（ｄ）を最小化することによって、噴射部１００と噴射チューブ４００との間にＬＰＧ燃料が残留しなくなるため、噴射部１００と噴射チューブ４００との間でのＬＰＧ燃料の気化を防止すると共に、タールの発生及び固着を最小化して、噴射チューブ４００の噴射孔４００ａがタールによって塞がるのを防止することができる。
また、噴射部１００と噴射チューブ４００との間にタールが固着しないので、別途の超音波洗浄が必要でなくなる。 A tapered portion 300b that contacts the distal end portion 410 of the injection tube 400 is formed on the other end side of the tip penetration portion 300a, and the injection portion 100 and the injection tube 400 are moved by moving the injection tube 400 to one end side by a predetermined distance. The airtightness between the injection unit 100 and the injection tube 400 can be maintained.
By minimizing the gap (d) between the injection unit 100 and the injection tube 400, no LPG fuel remains between the injection unit 100 and the injection tube 400. It is possible to prevent vaporization of the LPG fuel between them and minimize the generation and sticking of tar, thereby preventing the injection hole 400a of the injection tube 400 from being blocked by tar.
Further, since tar does not adhere between the injection unit 100 and the injection tube 400, separate ultrasonic cleaning is not necessary.

噴射チューブ４００は、熱伝導率が低いテフロン（登録商標）樹脂から形成することができる。噴射チューブ４００をテフロン（登録商標）樹脂で形成することによって、噴射チューブ４００を通過する液状の燃料がハウジング２００を通じて熱を吸収し、液状の燃料は気化して気相の燃料に変化するので、燃料の流れが低下するのを防止することができる。
以上、本発明に関する好ましい実施形態を説明したが、本発明は前記実施形態に限定されず、本発明の属する技術範囲を逸脱しない範囲での全ての変更が含まれる。 The injection tube 400 can be formed of Teflon (registered trademark) resin having low thermal conductivity. By forming the injection tube 400 from Teflon (registered trademark) resin, the liquid fuel passing through the injection tube 400 absorbs heat through the housing 200, and the liquid fuel is vaporized and changed into a gas phase fuel. It is possible to prevent the fuel flow from being lowered.
As mentioned above, although preferred embodiment regarding this invention was described, this invention is not limited to the said embodiment, All the changes in the range which does not deviate from the technical scope to which this invention belongs are included.

１００ 噴射部
１０１ プラグ
２００ ハウジング
２１０ メインハウジング
２１０ａ ハウジング貫通部
２１１ 燃料供給部
２１２ 燃料リターン部
２１３ 結合用フランジ
２１４ Ｏリング
２２０ カバー
３００ アイシングチップ
３００ａ チップ貫通部
３００ｂ テーパ部
４００ 噴射チューブ
４００ａ 噴射孔
４１０ 末端部
４２０ 中間部

DESCRIPTION OF SYMBOLS 100 Injection part 101 Plug 200 Housing 210 Main housing 210a Housing penetration part 211 Fuel supply part 212 Fuel return part 213 Coupling flange 214 O-ring 220 Cover 300 Icing tip 300a Tip penetration part 300b Taper part 400 Injection tube 400a Injection hole 410 Terminal part 420 Middle part

Claims (6)

一端側から他端側に燃料を噴射する噴射部と、前記噴射部の外周を囲むハウジングと、前記ハウジングの他端側に結合され、チップ貫通部を有するアイシングチップと、前記噴射部の他端側に連通され、前記チップ貫通部を貫通して設けられる噴射チューブと、前記チップ貫通部の他端側にテーパ状に形成されたテーパ部と、を有することを特徴とするＬＰＩインジェクター。   An injection unit that injects fuel from one end side to the other end side, a housing that surrounds the outer periphery of the injection unit, an icing tip that is coupled to the other end side of the housing and has a tip through portion, and the other end of the injection unit An LPI injector comprising: an injection tube that communicates with a side and provided through the tip penetrating portion; and a tapered portion that is formed in a tapered shape on the other end side of the tip penetrating portion. 前記噴射チューブの末端部の外縁は前記チップ貫通部のテーパ部のテーパ面と当接することを特徴とする請求項１に記載のＬＰＩインジェクター。   2. The LPI injector according to claim 1, wherein an outer edge of a distal end portion of the spray tube is in contact with a tapered surface of a tapered portion of the tip penetrating portion. 前記チップ貫通部の前記テーパ部の傾斜角は、前記チップ貫通部の中心軸を基準として１０±２度乃至２０±２度の範囲であることを特徴とする請求項２に記載のＬＰＩインジェクター。   3. The LPI injector according to claim 2, wherein an inclination angle of the tapered portion of the chip penetrating portion is in a range of 10 ± 2 degrees to 20 ± 2 degrees with respect to a central axis of the chip penetrating portion. 前記噴射チューブの末端部の直径は前記噴射チューブの中間部の直径より小さいことを特徴とする請求項３に記載のＬＰＩインジェクター。   The LPI injector according to claim 3, wherein a diameter of a terminal portion of the spray tube is smaller than a diameter of an intermediate portion of the spray tube. 前記ハウジングは、前記噴射チューブに貫通されるハウジング貫通部を有することを特徴とする請求項１に記載のＬＰＩインジェクター。   The LPI injector according to claim 1, wherein the housing has a housing penetration portion that is penetrated by the injection tube. 前記ハウジング貫通部は前記チップ貫通部と連通することを特徴とする、請求項１に記載のＬＰＩインジェクター。   The LPI injector according to claim 1, wherein the housing penetrating portion communicates with the chip penetrating portion.
JP2011124838A 2010-12-06 2011-06-03 LPI injector Expired - Fee Related JP5813378B2 (en)

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KR1020100123555A KR20120062336A (en) 2010-12-06 2010-12-06 Lpi injector
KR10-2010-0123555 2010-12-06

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