JP2010138828A - Lpg injector and lpg injection device - Google Patents

Lpg injector and lpg injection device Download PDF

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Publication number
JP2010138828A
JP2010138828A JP2008316668A JP2008316668A JP2010138828A JP 2010138828 A JP2010138828 A JP 2010138828A JP 2008316668 A JP2008316668 A JP 2008316668A JP 2008316668 A JP2008316668 A JP 2008316668A JP 2010138828 A JP2010138828 A JP 2010138828A
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Prior art keywords
lpg
injector
intake passage
intake
intake manifold
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Japanese (ja)
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Akiyuki Wakabayashi
晃行 若林
Masashi Iwasaki
真史 岩崎
Shinya Yamaguchi
真也 山口
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Nikki Co Ltd
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Nikki Co Ltd
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Priority to JP2008316668A priority Critical patent/JP2010138828A/en
Priority to KR1020090102262A priority patent/KR20100068186A/en
Priority to AU2009236040A priority patent/AU2009236040A1/en
Publication of JP2010138828A publication Critical patent/JP2010138828A/en
Pending legal-status Critical Current

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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
    • F02M61/14—Arrangements of injectors with respect to engines; Mounting of injectors
    • F02M61/145—Arrangements of injectors with respect to engines; Mounting of injectors the injection nozzle opening into the air intake conduit
    • 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
    • F02M21/0251—Details of actuators therefor
    • 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
    • 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

Abstract

<P>PROBLEM TO BE SOLVED: To avoid icing while minimizing increase in cost in a fuel supply system for injecting and supplying LPG as a liquid phase to an engine. <P>SOLUTION: The LPG injector 3A includes an insert part 30A which is inserted to the internal space of an intake manifold 20 with a fuel injection port 31 provided at its leading end being projected thereto, the insert part 30A being mounted on the intake manifold 20 by inserting it from the outside of an injector mounting hole 20a to inject LPG to an intake passage 2 of an engine as it remains as a liquid phase. The insert part is mounted on the intake manifold 20 with the leading end of the insert part 30A protruded in the central direction of the intake passage 2 by a predetermined amount or more beyond an extended plane of the inner circumferential surface of the intake passage 2 upstream of the injector mounting hole 20a toward the downstream side. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、ＬＰＧインジェクタ及びＬＰＧ噴射装置に関し、殊に、液相のＬＰＧをエンジンの吸気通路内に噴射する燃料供給システムにおいて、アイシングの発生を回避する機能を有したＬＰＧインジェクタ及びこのＬＰＧインジェクタを備えてアイシングの発生を回避するＬＰＧ噴射装置に関する。   The present invention relates to an LPG injector and an LPG injector, and more particularly to an LPG injector having a function of avoiding the occurrence of icing in a fuel supply system for injecting a liquid phase LPG into an intake passage of an engine, and the LPG injector. The present invention relates to an LPG injection device that is provided and avoids occurrence of icing.

従来より、図３に示すようにＬＰＧインジェクタ３Ｂを備えＬＰＧを液相のまま吸気通路（吸入ポート）２内に噴射してエンジンに供給する形式のＬＰＧ噴射装置１Ｂが広く知られている。このような燃料供給方式では、噴射されたＬＰＧの圧力が急激に大気圧以下（＝エンジン吸入負圧）まで低下して液相から気相に変化するため、噴射されたＬＰＧは相変化に伴い周辺と熱交換を行うことになる。   Conventionally, as shown in FIG. 3, an LPG injection device 1B having an LPG injector 3B and injecting LPG into an intake passage (intake port) 2 in a liquid phase and supplying the LPG to an engine is widely known. In such a fuel supply system, the pressure of the injected LPG suddenly drops below the atmospheric pressure (= engine intake negative pressure) and changes from the liquid phase to the gas phase. It will exchange heat with the surroundings.

その場合、吸気通路２内壁のＬＰＧが付着した部分やその周辺で急激な温度低下を起こして、空気中の水分を凍結させながら吸気通路内に氷結や氷柱を形成するいわゆるアイシング現象を生じることがある。そして、このアイシングが発生することにより、吸気通路２内に堆積した氷結が空気抵抗となったり、脱落した氷結がエンジンのシリンダ内に流入したりして、適切な空燃比制御に対する妨げとなりやすい。   In that case, a so-called icing phenomenon may occur in which the temperature of the inner wall of the intake passage 2 on the inner wall of the intake passage 2 and the vicinity thereof suddenly drops, forming icing or ice columns in the intake passage while freezing moisture in the air. is there. When this icing occurs, the icing accumulated in the intake passage 2 becomes air resistance, or the dropped icing flows into the cylinder of the engine, which tends to hinder appropriate air-fuel ratio control.

このような燃料の相変化に伴うアイシングの問題に対し、インジェクタ先端にエンジンからの熱伝導を利用した熱交換ノズルを設けることにより、アイシングの発生を回避しようとする技術が知られており、また、特開２００３−２８６９１３号公報に記載され図２に示すもののように、吸気マニホルド２１とエンジン側取付け部との間に、吸気通路２を取り囲むように冷却水通路４０を設けたガスケット４を介装することにより、インジェクタ３Ｂの近辺と吸気マニホルド２１のこれに近接する部分を加温して、アイシングの発生を回避しようとする技術も知られている。   In response to the problem of icing associated with such a phase change of fuel, a technique for avoiding the occurrence of icing is known by providing a heat exchange nozzle using heat conduction from the engine at the tip of the injector. As shown in FIG. 2 and described in Japanese Patent Laid-Open No. 2003-286913, a gasket 4 having a cooling water passage 40 provided between the intake manifold 21 and the engine side mounting portion so as to surround the intake passage 2 is interposed. There is also known a technique of heating the vicinity of the injector 3B and the portion of the intake manifold 21 adjacent to the injector 3B to avoid the occurrence of icing.

このように、エンジン由来の熱を利用してインジェクタ付近を加温することにより、アイシングの発生を回避しやすいものとすることができる。しかしながら、上述した両技術においては、エンジンの熱をインジェクタ付近まで伝導または送達するための機構が必要となり、そのための専用部品を新たに追加する費用を要してコストアップを招くことになる。
特開２００３−２８６９１３号公報 In this way, it is possible to easily avoid the occurrence of icing by heating the vicinity of the injector using the heat derived from the engine. However, in both the technologies described above, a mechanism for conducting or delivering the heat of the engine to the vicinity of the injector is required, and it is necessary to newly add a dedicated component for that purpose, resulting in an increase in cost.
JP 2003-286913 A

本発明は、上記のような問題点を解決しようとするものであり、ＬＰＧを液相で噴射してエンジンに供給する燃料供給システムについて、コストアップを最小限としながらアイシングの発生を回避できるようにすることを課題とする。   The present invention is intended to solve the above-described problems, and a fuel supply system that injects LPG in a liquid phase and supplies it to an engine can avoid the occurrence of icing while minimizing cost increase. The challenge is to make it.

そこで、本発明は、先端に形成した燃料噴射口を吸気マニホルドの内部空間に突出した状態で挿入される挿入部を備えており、この挿入部をインジェクタ取付孔の外側から挿入して吸気マニホルドに取付けられ、ＬＰＧを液相のままエンジンの吸気通路に噴射するＬＰＧインジェクタにおいて、前記吸気マニホルドに取り付けられたときに、前記挿入部の先端が、前記インジェクタ取付孔の上流側における前記吸気通路内周面を下流側に延長した面を越えて前記吸気通路の中心方向に所定量以上突出させることとした。   Therefore, the present invention includes an insertion portion that is inserted in a state where the fuel injection port formed at the tip protrudes into the internal space of the intake manifold, and the insertion portion is inserted from the outside of the injector mounting hole to the intake manifold. In an LPG injector that is attached and injects LPG into the intake passage of the engine in a liquid phase, when the LPG injector is attached to the intake manifold, the distal end of the insertion portion is located on the inner periphery of the intake passage on the upstream side of the injector attachment hole. The surface is projected beyond the surface extended downstream by a predetermined amount or more in the central direction of the intake passage.

図３に示したように、従来のＬＰＧインジェクタ３Ｂはその挿入部３０Ｂの先端が、インジェクタ取付孔２１ａ上流側の吸気通路２内周面を下流側に延長した一点鎖線で示す面よりも引っ込んだ位置となることから、噴射したＬＰＧの一部しか吸気通路の中心付近の吸入空気流の速い部分に当たらないために、ＬＰＧが吸気通路壁面に付着してアイシングを生じやすかった。これに対し、前述の本発明のように、インジェクタの挿入部先端が吸気通路内に所定量以上突出して燃料噴射口が吸気通路内の吸入空気流が比較的速い部分に近接する位置になるものとしたことにより、簡易な構成でも噴射したＬＰＧが吸気通路内壁に付着して氷結を招くことを大幅に減少させることになり、アイシングの発生を回避しやすいものとした。   As shown in FIG. 3, in the conventional LPG injector 3B, the distal end of the insertion portion 30B is retracted from the surface indicated by the alternate long and short dash line in which the inner peripheral surface of the intake passage 2 upstream of the injector mounting hole 21a extends downstream. Therefore, only a part of the injected LPG hits a portion of the intake passage near the center of the intake passage where the intake air flow is fast. Therefore, the LPG is likely to adhere to the wall surface of the intake passage and cause icing. On the other hand, as in the above-described present invention, the tip of the insertion portion of the injector protrudes a predetermined amount or more into the intake passage, and the fuel injection port is positioned close to a portion where the intake air flow in the intake passage is relatively fast As a result, it is possible to greatly reduce the occurrence of icing because the injected LPG adheres to the inner wall of the intake passage and causes icing even with a simple configuration.

また、この場合、吸気マニホルドに取り付けることにより、燃料噴射口がインジェクタ軸線と吸気通路内周面との交点から２０ｍｍ以内の位置になるものとすれば、吸入空気流の速い部分に向かって確実にＬＰＧを噴射することができるようになるため、アイシングの発生を一層回避しやすいものとなる。   Further, in this case, if the fuel injection port is located within 20 mm from the intersection of the injector axis and the intake passage inner peripheral surface by being attached to the intake manifold, it is surely directed toward the portion where the intake air flow is fast. Since it becomes possible to inject LPG, it becomes easier to avoid the occurrence of icing.

さらに、上述したＬＰＧインジェクタは、燃料取込み方式がトップフィード型であることを特徴としたものとすれば、上述した構成及び作用を簡易且つ低コストで実現することができる。   Furthermore, if the above-described LPG injector is characterized in that the fuel intake system is a top feed type, the above-described configuration and operation can be realized easily and at low cost.

さらにまた、上述したＬＰＧインジェクタを、吸気マニホルドのインジェクタ取付孔に取付けてなるものであって、ＬＰＧインジェクタの挿入部先端がインジェクタ取付孔上流側の吸気通路内周面を下流側に延長した面を越えて吸気通路の中心方向に所定量以上突出していることを特徴としたＬＰＧ噴射装置とすれば、新たな部品の追加を要することなく、アイシングの発生を回避しながら燃料を供給することができる。   Furthermore, the above-described LPG injector is attached to the injector mounting hole of the intake manifold, and the front end of the insertion portion of the LPG injector extends the downstream surface of the inner peripheral surface of the intake passage upstream of the injector mounting hole. If the LPG injection device is characterized in that it protrudes beyond the predetermined amount toward the center of the intake passage, it is possible to supply fuel while avoiding the occurrence of icing without requiring the addition of new parts. .

インジェクタの挿入部先端を吸気通路内に所定量以上突出させただけの簡易な構成の本発明によると、コストアップを最小限としながらアイシングの発生を回避することができるものである。   According to the present invention having a simple configuration in which the distal end of the insertion portion of the injector is protruded by a predetermined amount or more into the intake passage, the occurrence of icing can be avoided while minimizing the cost increase.

以下に、図面を参照しながら本発明を実施するための最良の形態を説明する。   The best mode for carrying out the present invention will be described below with reference to the drawings.

図１は、本実施の形態のＬＰＧ噴射装置１Ａの部分縦断面図を示すものであり、ＬＰＧ噴射装置１Ａは、図示しないＬＰＧエンジンの吸気通路（吸気ポート）２内にＬＰＧを液相（液体）のまま噴射して供給するためのものであり、吸気通路２を構成する吸気マニホルド２０のインジェクタ取付孔２０ａの外側から、先端側の挿入部３０Ａを吸気通路２に向かって挿通した状態でインジェクタ３Ａが取付けられる。   FIG. 1 shows a partial vertical cross-sectional view of an LPG injection device 1A of the present embodiment. The LPG injection device 1A supplies LPG in a liquid phase (liquid phase) in an intake passage (intake port) 2 of an LPG engine (not shown). ) As it is, and the injector is inserted from the outside of the injector mounting hole 20a of the intake manifold 20 constituting the intake passage 2 through the insertion portion 30A on the distal end side toward the intake passage 2. 3A is attached.

そして、本実施の形態のＬＰＧ噴射装置１Ａにおいては、インジェクタ取付孔２０ａに取り付けられたインジェクタ３Ａの、吸気通路２内に挿入されて内側空間で突出した円柱状の挿入部３０Ａの先端が、インジェクタ取付孔２０ａよりも上流側の吸気通路２の内周面を下流側に延長した一点鎖線で示す面を越えて、吸気通路２の中心に向かって所定量以上突出した状態となっている。   In the LPG injection device 1A of the present embodiment, the tip of the cylindrical insertion portion 30A that is inserted into the intake passage 2 and protrudes from the inner space of the injector 3A attached to the injector attachment hole 20a is the injector. It is in a state of projecting a predetermined amount or more toward the center of the intake passage 2 beyond the surface indicated by the alternate long and short dash line that extends the inner peripheral surface of the intake passage 2 upstream of the mounting hole 20a to the downstream side.

尚、挿入部３０Ａの突出量については、本願発明者らによる実験結果から、通常のＬＰＧエンジンにおいて想定される一般的な内径の吸気通路においては、挿入部３０Ａの先端面中央に設けた燃料噴射口（燃料噴射孔の開口部）３１の位置が、インジェクタ軸線が対向する吸気通路２内周面に交わった交点から、２０ｍｍ以内の位置になる突出量とすることにより、アイシングの回避機能が充分に発揮されることが検証されたため、本実施の形態においてもこれと同様の突出量としている。   As for the protruding amount of the insertion portion 30A, the fuel injection provided at the center of the front end surface of the insertion portion 30A in the intake passage having a general inner diameter assumed in a normal LPG engine is based on the experimental results by the inventors of the present application. By setting the position of the mouth (opening portion of the fuel injection hole) 31 to a position within 20 mm from the intersection where the injector axis line intersects the inner peripheral surface of the intake passage 2, the function of avoiding icing is sufficient Therefore, in the present embodiment, the same amount of protrusion is used.

即ち、図３に示したＬＰＧ噴射装置１Ｂのように、インジェクタ３Ｂの挿入部３０Ｂの長さが短く、一点鎖線で示す上流側の吸気通路２内周面を下流側に延長した面よりも先端が引っ込んだ状態となっている従来例においては、噴射したＬＰＧが吸入空気流の流速の速い部分（略中心部）に対して一部しか当たらないため、吸気通路２内に噴射したＬＰＧの多くが内壁に付着し、氷結を招いてアイシングの発生に繋がるという問題があった。   That is, like the LPG injection device 1B shown in FIG. 3, the length of the insertion portion 30B of the injector 3B is short, and the tip of the upstream side of the intake passage 2 shown by the alternate long and short dash line is extended to the downstream side. In the conventional example in which the air is retracted, the injected LPG hits only a part of the portion where the flow velocity of the intake air flow is high (substantially the central portion), so that most of the LPG injected into the intake passage 2 Has adhered to the inner wall, causing freezing and causing icing.

これに対し、本実施の形態のＬＰＧ噴射装置１Ａでは、インジェクタ３Ａの挿入部３０Ａを図のように従来例よりも長くしたことにより、その先端、即ち先端面に開口した燃料噴射口３１の位置が、吸気通路２の中心部付近の吸入空気流が速くなる部分に近接した位置とした。   On the other hand, in the LPG injection device 1A of the present embodiment, the insertion portion 30A of the injector 3A is made longer than the conventional example as shown in the figure, so that the position of the fuel injection port 31 opened at the tip, that is, the tip surface. However, the position near the center of the intake passage 2 near the portion where the intake air flow becomes faster.

そのため、噴射したＬＰＧの多くが比較的速い吸入空気流に乗って下流側に流れるとともに、多量の空気の存在により気化しやすくなることに加え気相になる際の冷却作用も軽減されることになるため、ＬＰＧが吸気通路２の内壁に付着して氷結を生じさせる現象が最小限に抑えられて、アイシングの発生を回避しやすくなった。   For this reason, most of the injected LPG rides on a relatively fast intake air flow and flows downstream, and in addition to being easily vaporized due to the presence of a large amount of air, the cooling action when entering the gas phase is also reduced. Therefore, the phenomenon that LPG adheres to the inner wall of the intake passage 2 and causes icing is minimized, and it is easy to avoid the occurrence of icing.

また、本実施の形態においては、図２に示したアイシング対策を講じた従来例等とは異なり、インジェクタ３Ａの挿入部３０Ａの長さを所定量延長しただけの簡易な変更のみで実施できるものであるため、エンジンの熱を伝導・送達する等の目的で新たな専用部品を追加することを不要として、コストアップを殆ど伴わずに実施可能である。   Further, in the present embodiment, unlike the conventional example in which the measures against icing shown in FIG. 2 are taken, the embodiment can be implemented with only a simple change by extending the length of the insertion portion 30A of the injector 3A by a predetermined amount. Therefore, it is not necessary to add a new dedicated part for the purpose of conducting / delivering the heat of the engine, and the present invention can be implemented with almost no cost increase.

さらに、このＬＰＧ噴射装置１Ａでは、インジェクタ３Ａの燃料取込方式にトップフィードタイプを採用している。これはボトムフィードタイプ等、他の方式によると挿入部３０Ａ及びこれを挿通するためのインジェクタ取付孔２０ａの構成が複雑になりやすく、従来のシステムを利用した場合の実施を容易にすることができず、コストアップに繋がりやすくなるからである。   Further, in this LPG injection device 1A, a top feed type is adopted as a fuel intake system of the injector 3A. According to other methods such as a bottom feed type, the configuration of the insertion portion 30A and the injector mounting hole 20a for inserting the insertion portion 30A is likely to be complicated, and can be easily implemented when a conventional system is used. This is because the cost is likely to increase.

さらにまた、本実施の形態においては、ガソリンエンジンをＬＰＧエンジンに改造する場合において、本来のガソリンインジェクタが取り付けられていたインジェクタ取付孔をそのまま使用することを想定しており、上述した簡易な構成がその実施を容易なものとするとともに、改造の手間を最小限に抑えることを可能としている。   Furthermore, in the present embodiment, when the gasoline engine is remodeled to the LPG engine, it is assumed that the injector mounting hole in which the original gasoline injector is mounted is used as it is, and the above-described simple configuration is used. This makes it easy to implement and minimizes the effort of remodeling.

以上、述べたように、ＬＰＧを液相で噴射する燃料供給システムについて、本発明により、コストアップを最小限としながらアイシングの発生を有効に回避できるようになった。   As described above, the fuel supply system for injecting LPG in the liquid phase can effectively avoid the occurrence of icing with the present invention while minimizing the cost increase.

本発明の実施の形態を示す部分縦断面図。The fragmentary longitudinal cross-section which shows embodiment of this invention. 従来例を示す部分縦断面図。The fragmentary longitudinal cross-section which shows a prior art example. 従来例を示す部分縦断面図。The fragmentary longitudinal cross-section which shows a prior art example.

符号の説明Explanation of symbols

１Ａ ＬＰＧ噴射装置、２ 吸気通路、３Ａ ＬＰＧインジェクタ、２０ 吸気マニホルド、２０ａ インジェクタ取付孔、３１ 燃料噴射口
1A LPG injection device, 2 intake passage, 3A LPG injector, 20 intake manifold, 20a injector mounting hole, 31 fuel injection port

Claims (4)

先端に形成した燃料噴射口を吸気マニホルドの内部空間に突出した状態で挿入される挿入部を備えており、この挿入部をインジェクタ取付孔の外側から挿入して吸気マニホルドに取付けられ、ＬＰＧを液相のままエンジンの吸気通路に噴射するＬＰＧインジェクタにおいて、前記吸気マニホルドに取り付けられたときに、前記挿入部の先端が、前記インジェクタ取付孔の上流側における前記吸気通路内周面を下流側に延長した面を越えて前記吸気通路の中心方向に所定量以上突出することを特徴としたＬＰＧインジェクタ。   A fuel injection port formed at the tip is inserted into the intake manifold so that the fuel injection port protrudes into the internal space of the intake manifold. The insertion portion is inserted from the outside of the injector mounting hole and attached to the intake manifold. In an LPG injector that injects into the intake passage of an engine in phase, the tip of the insertion portion extends downstream of the inner peripheral surface of the intake passage upstream of the injector mounting hole when attached to the intake manifold. An LPG injector that protrudes beyond a predetermined surface by a predetermined amount or more toward the center of the intake passage. 前記吸気マニホルドに取り付けることにより、前記燃料噴射口がインジェクタ軸線と前記吸気通路内周面との交点から２０ｍｍ以内に位置することを特徴とする請求項１に記載したＬＰＧインジェクタ。   2. The LPG injector according to claim 1, wherein the fuel injection port is positioned within 20 mm from the intersection of the injector axis and the inner peripheral surface of the intake passage by being attached to the intake manifold. 3. 燃料取込み方式がトップフィード型であることを特徴とする請求項１または２に記載したＬＰＧインジェクタ。   The LPG injector according to claim 1 or 2, wherein the fuel intake system is a top feed type. 請求項１，２または３に記載したＬＰＧインジェクタを、前記吸気マニホルドのインジェクタ取付孔に取付けてなるものであり、前記ＬＰＧインジェクタの挿入部先端が、前記インジェクタ取付上流側の前記吸気通路内周面を下流側に延長した面を越えて前記吸気通路の中心方向に所定量以上突出していることを特徴としたＬＰＧ噴射装置。
The LPG injector according to claim 1, 2 or 3 is attached to an injector mounting hole of the intake manifold, and a distal end of the insertion portion of the LPG injector is an inner peripheral surface of the intake passage on the upstream side of the injector mounting An LPG injection device characterized by projecting a predetermined amount or more in the center direction of the intake passage beyond a surface extending downstream from the intake passage.
JP2008316668A 2008-12-12 2008-12-12 Lpg injector and lpg injection device Pending JP2010138828A (en)

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KR1020090102262A KR20100068186A (en) 2008-12-12 2009-10-27 Lpg injector and lpg injection apparatus
AU2009236040A AU2009236040A1 (en) 2008-12-12 2009-11-12 LPG injector and LPG injection device

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KR101471167B1 (en) * 2013-07-08 2014-12-11 한국기계연구원 Fuel supply apparatus for diesel-gas dual fuel engine

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KR101567537B1 (en) 2014-05-15 2015-11-10 한국기계연구원 Intake manifold with bump structures for prevention of icing

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