KR20120009317A - Dual fuel injection valve - Google Patents

Dual fuel injection valve Download PDF

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Publication number
KR20120009317A
KR20120009317A KR1020100071496A KR20100071496A KR20120009317A KR 20120009317 A KR20120009317 A KR 20120009317A KR 1020100071496 A KR1020100071496 A KR 1020100071496A KR 20100071496 A KR20100071496 A KR 20100071496A KR 20120009317 A KR20120009317 A KR 20120009317A
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South Korea
Prior art keywords
chamber
fuel
injection
needle valve
fuel oil
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KR1020100071496A
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Korean (ko)
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KR101158631B1 (en
Inventor
정강윤
김응성
김주태
박득진
허광철
김종석
하은
노범용
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현대중공업 주식회사
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Priority to KR1020100071496A priority Critical patent/KR101158631B1/en
Priority to PCT/KR2011/001886 priority patent/WO2012011650A1/en
Publication of KR20120009317A publication Critical patent/KR20120009317A/en
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Publication of KR101158631B1 publication Critical patent/KR101158631B1/en

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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
    • F02M43/00—Fuel-injection apparatus operating simultaneously on two or more fuels, or on a liquid fuel and another liquid, e.g. the other liquid being an anti-knock additive
    • F02M43/04—Injectors peculiar thereto
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
    • F02D19/0663—Details on the fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02D19/0686—Injectors
    • F02D19/0694—Injectors operating with a plurality of fuels
    • 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
    • F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
    • F02M45/02—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts
    • F02M45/04—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts with a small initial part, e.g. initial part for partial load and initial and main part for full load
    • F02M45/08—Injectors peculiar thereto
    • F02M45/086—Having more than one injection-valve controlling discharge orifices
    • 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
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
    • F02D19/0639—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels
    • F02D19/0649—Liquid fuels having different boiling temperatures, volatilities, densities, viscosities, cetane or octane numbers
    • F02D19/0657—Heavy or light fuel oils; Fuels characterised by their impurities such as sulfur content or differences in grade, e.g. for ships
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/46—Valves, e.g. injectors, with concentric valve bodies
    • 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)
  • Oil, Petroleum & Natural Gas (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

PURPOSE: A double fuel injection valve is provided to mechanically inject fuel necessary for the operation of an engine within a specific pressure range. CONSTITUTION: A double fuel injection valve comprises an injection valve body and a nozzle part. The nozzle part includes a first chamber(210), a second chamber(211), a needle valve for FO(230), and a needle valve for DO(231). The first chamber is connected to a fuel inlet for FO through a flow path(212) and filled with FO to form an opening pressure, and the first chamber is formed with an injection nozzle for FO(220) for injecting fuel oil. The second chamber is formed with an injection nozzle for DO(221) for injecting fuel oil. The needle valve for FO opens or closes the injection nozzle for FO according to a pressure difference of fuel oil filled in the first chamber. The needle valve for DO is installed inside the needle valve for FO and divides the first and second chambers. The needle valve for DO is operated up and down according to a pressure difference of fuel oil filled in the second chamber to open and close the injection nozzle for DO.

Description

２중 연료분사밸브{Dual fuel injection valve}Dual fuel injection valve

본 발명은 2중 연료분사밸브에 관한 것으로, 기존의 연료분사밸브보다 콤팩트하게 구성함과 동시에 2중 연료유를 사용함에 있어서도 각각의 연료를 분사 제어할 수 있는 2중 연료분사밸브에 관한 것이다.
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double fuel injection valve, and more compact than a conventional fuel injection valve, and to a double fuel injection valve capable of injection control of each fuel even when using a double fuel oil.

기존 기계식 연료분사밸브의 작동 원리를 설명 하면, 개방 압력(Nozzle Opening Pressure) 이상의 연료가 들어오면 열리고<스프링 힘보다 높은 압력일 경우> 낮은 압력이 들어오면 닫히는<스프링 힘보다 낮은 압력일 경우> 단순한 니들과 스프링을 가지고 있다.Explaining the working principle of a conventional mechanical fuel injection valve, it opens when fuel above the nozzle opening pressure (when pressure is higher than the spring force) and closes when low pressure comes in (when pressure is lower than spring force) It has a needle and a spring.

각각의 연료펌프에서 형성된 고압의 연료가 연료분사밸브에 들어올 때, 연료분사밸브의 니들 하단 노즐포켓에서 개방 압력보다 높은 압력이 형성되면 니들밸브를 누르는 스프링 힘을 이겨내고 니들밸브를 들어 올려 노즐 끝단에 위치한 여러 개의 노즐홀을 통해 연료가 실린더 내로 분사되게 된다.When the high-pressure fuel formed in each fuel pump enters the fuel injection valve, if a pressure higher than the opening pressure is formed in the needle lower nozzle pocket of the fuel injection valve, it overcomes the spring force that presses the needle valve and lifts the needle valve to the nozzle end. Fuel is injected into the cylinder through several nozzle holes located.

이와 같은 방법은 정해진 하나의 개방 압력에 따라 노즐홀이 개방되는 하나의 메커니즘으로 구성되어 있으며, 엔진 조립시 정해진 타이밍에 따라 항상 같은 시점 (분사밸브 내의 압력이 개방 압력 이상이 되는 시점) 에서 분사가 이루어지게 된다.Such a method consists of a mechanism in which the nozzle hole is opened in accordance with a predetermined opening pressure, and injection is always performed at the same time (at a time when the pressure in the injection valve becomes higher than the opening pressure) according to a predetermined timing when assembling the engine. Will be done.

종래의 2중 연료용 디젤엔진에 있어, 한 실린더 내에 중유가 필요한 운전(FO) 일 때는 중유용 연료분사밸브가 필요하고, 가스가 필요한 운전일 때는 가스 착화용으로 사용되는 스파크 플러그 또는 마이크로 파이로트가 설치되어야 하는 2개 이상의 연료분사밸브가 필요하게 되어 있다.In the conventional double-fuel diesel engine, a spark plug or a micro pilot used for fuel injection valves for heavy oil when an operation (FO) requiring heavy oil in one cylinder is required, and for gas ignition for an operation requiring gas. At least two fuel injection valves are required to be installed.

상기와 같이 종래에는 중유와 가스를 각각 사용하기 위한 2개의 연료분사밸브를 별도로 구비해야 하기 때문에 연료분사밸브 설치에 따른 비용이 많이 소요되는 문제점이 있다.
As described above, since two fuel injection valves for using heavy oil and gas must be provided separately, the fuel injection valve may be expensive.

상기와 같은 문제점을 해결하기 위한 본 발명의 목적은, 2중의 연료 분사가 필요한 디젤엔진의 피스톤에 2중 연료분사가 가능하도록 하는 2중연료분사밸브를 설치하여 엔진의 필요 운전에 따라 각각의 연료를 분사 가능하도록 함으로써, 엔진의 필요로드 및 엔진의 성능이 향상되도록 하고, 엔진 운전에서 필요한 인젝션 연료펌의 작동에 따라 공급되는 연료가 필요 압력에 도달했을 때 일정 압력 범위 내에서 기계적으로 분사될 수 있도록 하는 2중 연료분사 밸브를 제공함에 있다.
An object of the present invention for solving the above problems is to install a double fuel injection valve to enable a double fuel injection to the piston of the diesel engine that requires a double fuel injection, each fuel according to the required operation of the engine By enabling the injection, the required load of the engine and the performance of the engine are improved, and the fuel supplied according to the operation of the injection fuel pump required in the engine operation can be mechanically injected within a certain pressure range when the required pressure is reached. To provide a dual fuel injection valve.

상기한 바와 같은 목적을 달성하고 종래의 결점을 제거하기 위한 과제를 수행하는 본 발명은, FO용 연료주입구 및 DO용 연료주입구가 형성되어 있는 분사밸브바디와, 상기 분사밸브바디에 결합되고 연료유에 의한 개방압력이 형성됨으로써 니들을 들어올려 연료유가 분사되도록 하는 챔버가 형성되어 있는 노즐부를 포함하여 구성되는 연료분사밸브에 있어서, 상기 노즐부는, The present invention to achieve the object as described above and to solve the conventional drawbacks, the injection valve body is formed with a fuel inlet for FO and the fuel inlet for DO, and coupled to the injection valve body to the fuel oil In the fuel injection valve comprising a nozzle portion is formed by the opening pressure is formed by the chamber to raise the needle to inject the fuel oil, the nozzle portion,

상기 FO용 연료주입구에 유로를 통해 연결되어 FO가 채워짐으로써 개방 압력이 형성되고 연료유가 분사될 수 있도록 FO용 분사노즐구가 형성되어 있는 제1챔버; 상기 제1챔버의 하부에 오목한 형태로 형성되고 상기 DO용 연료주입구에 유로를 통해 연결되어 DO가 채워짐으로써 개방 압력이 형성되고 연료유가 분사될 수 있도록 DO용 분사노즐구가 형성되어 있는 제2챔버; 상기 제1챔버에 채워지는 연료유의 상호 압력차에 따라 상기 FO용 분사노즐구를 개폐시켜주는 FO용 니들밸브; 상기 FO용 니들밸브의 내부에 설치되어 상기 제1챔버와 제2챔버를 구획해주고 제2챔버에 채워지는 연료유의 상호압력차에 따라 상하로 작동되어 상기 DO용 분사노즐구를 개폐시켜주는 DO용 니들밸브를 포함하여 구성되는 것을 특징으로 한다.A first chamber connected to the fuel inlet for the FO through a flow path to form an open pressure by filling the FO and injecting an FO injection nozzle therein to allow fuel oil to be injected; The second chamber is formed in a concave shape in the lower portion of the first chamber and is connected to the DO fuel inlet through a flow path to fill the DO so that an open pressure is formed and a DO injection nozzle port is formed so that fuel oil can be injected. ; A FO needle valve for opening and closing the FO injection nozzle port according to a mutual pressure difference between fuel oils filled in the first chamber; The DO is installed inside the needle valve for FO to partition the first chamber and the second chamber and operate up and down according to the mutual pressure difference of the fuel oil filled in the second chamber to open and close the DO injection nozzle port. It is characterized by including a needle valve.

또한 상기 제1챔버는, 상기 FO용 니들밸브를 받쳐줄 수 있도록 하부에 받침턱이 형성되고, 상기 받침턱의 하측으로 FO용 니들밸브의 상승시 연료유가 이동할 수 있도록 유로가 형성되며, 상기 유로에 연결되도록 FO용 분사노즐구가 형성되도록 구성되어, 상기 FO용 니들밸브가 상기 받침턱에 걸려짐으로써 제1챔버의 내부를 밀폐하여 개방압력이 형성되고 개방압력에 의해 FO용 니들밸브가 상승되어 연료유가 FO용 분사노즐구를 통해 분사되는 것을 특징으로 한다.In addition, the first chamber, the support jaw is formed in the lower portion to support the FO needle valve, the flow path is formed so that the fuel oil can move when the FO needle valve is raised to the lower side of the support jaw, FO injection nozzle port is formed to be connected, the FO needle valve is caught on the supporting jaw to seal the inside of the first chamber to form an opening pressure and the FO needle valve is raised by the opening pressure The fuel oil is characterized in that the injection through the injection nozzle for FO.

또한 상기 DO용 니들밸브의 내부에는 상기 제2챔버로 DO의 공급이 가능하도록 유로가 형성되어 있는 것을 특징으로 한다.In addition, the flow path is formed inside the DO needle valve to enable the supply of DO to the second chamber.

또한 상기 분사밸브바디의 내부에 설치되어 상기 FO용 니들밸브를 가압해주는 FO용 스핀들; 상기 FO용 스핀들에 탄성력을 제공해주는 FO용 스프링; 상기 FO용 스핀들의 내부에 설치되어 상기 DO용 니들밸브를 가압해주는 DO용 스핀들; 상기 DO용 스핀들에 탄성력을 제공하는 DO용 스프링;을 포함하여 구성되는 것을 특징으로 한다.In addition, the FO spindle is installed in the injection valve body to pressurize the FO needle valve; FO spring for providing an elastic force to the FO spindle; A DO spindle installed inside the FO spindle to pressurize the DO needle valve; And a spring for providing the elastic force to the spindle for the DO.

또한 상기 분사밸브바디에 고정너트를 통해 체결되어 FO용 스프링의 장력을 조절해주는 FO용 스프링 조정스크류; 상기 FO용 스프링 조정스크류의 내부에 위치하고 고정너트를 통해 분사밸브바디에 고정되어 DO용 스프링의 장력을 조절해주는 DO용 스프링 조정스크류;를 포함하여 구성되는 것을 특징으로 한다.
In addition, the FO spring adjustment screw is fastened to the injection valve body through a fixing nut to adjust the tension of the FO spring; And a spring adjustment screw for DO positioned in the FO spring adjustment screw and fixed to the injection valve body through a fixing nut to adjust tension of the spring for DO.

이상에서 설명한 바와 같이 본 발명에 의하면, 1개의 실린더에 본 발명의 연료분사밸브 1세트만 장착함으로써, 2개의 연료분사밸브를 설치할 필요 없이 엔진의 운전조건에 따라 연료를 선택하여 운전이 가능함으로 연료 절감 및 저비용으로 필요한 효과를 발생시키므로 엔진의 최적화 운전의 효과가 있다.
As described above, according to the present invention, by installing only one fuel injection valve of the present invention in one cylinder, fuel can be selected and operated according to the operating conditions of the engine without installing two fuel injection valves. Since it generates the necessary effects at low cost and low cost, there is an effect of optimizing the engine.

도 1 은 본 발명에 의한 2중 연료분사밸브를 나타낸 단면도,
도 2 는 본 발명에 의한 2중 연료분사밸브의 스풀부를 상세히 나타낸 단면도,
도 3 은 본 발명에 의한 2중 연료분사밸브의 FO연료 분사 실시 상태를 나타낸 예시도,
도 4 는 본 발명에 의한 2중 연료분사밸브의 DO연료 분사 실시 상태를 나타낸 예시도,1 is a cross-sectional view showing a double fuel injection valve according to the present invention,
2 is a cross-sectional view showing in detail the spool portion of the double fuel injection valve according to the present invention;
3 is an exemplary view showing a FO fuel injection state of the double fuel injection valve according to the present invention,
4 is an exemplary view showing a DO fuel injection state of the double fuel injection valve according to the present invention;

이하 본 발명의 실시 예인 구성과 그 작용을 첨부도면에 연계시켜 상세히 설명하면 다음과 같다. 또한 본 발명을 설명함에 있어서, 관련된 공지기능 혹은 구성에 대한 구체적인 설명이 본 발명의 요지를 불필요하게 흐릴 수 있다고 판단되는 경우 그 상세한 설명은 생략한다.Hereinafter, the configuration and the operation of the embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

도 1 은 본 발명에 의한 2중 연료분사밸브를 나타낸 단면도, 도 2 는 본 발명에 의한 2중 연료분사밸브의 노즐부를 상세히 나타낸 단면도로서, 1 is a cross-sectional view showing a double fuel injection valve according to the present invention, Figure 2 is a cross-sectional view showing in detail the nozzle portion of the double fuel injection valve according to the present invention,

도면에서와 같이 본 발명은 FO용 연료주입구(110)를 통해 일정압력의 연료유가 주입되는 FO용 연료이송구(120) 및 DO용 연료주입구(111)를 통해 일정압력의 연료유가 주입되는 DO용 연료이송구(121)가 내부에 형성되어 있는 분사밸브바디(100)와, 상기 분사밸브바디(100)에 결합되어 상기 FO 연료와 DO 연료를 별도로 분사할 수 있도록 구성되는 노즐부(200)를 포함하여 구성된다.As shown in the drawing, the present invention is a fuel for DO injected fuel oil at a constant pressure through the FO fuel injection port 120 and the DO fuel injection port 111 is injected fuel oil of a constant pressure through the FO fuel injection port 110. Including the injection valve body 100 is formed therein and the nozzle 121, the nozzle unit 200 is coupled to the injection valve body 100 and configured to separately inject the FO fuel and DO fuel It is composed.

상기 노즐부(200)는 FO용 연료주입구(110)에 연결되어 FO용 연료주입구(110)를 통해 주입되는 FO 연료가 채워짐으로써 개방 압력이 형성되고 연료유가 분사될 수 있도록 FO용 분사노즐구(220)가 형성되어 있는 제1챔버(210)와, 상기 제1챔버(210)의 하부에 오목한 형태로 형성되고 상기 DO용 연료주입구(111)에 연결되어 DO용 연료주입구(111)를 통해 주입되는 DO 연료유가 채워짐으로써 개방 압력이 형성되고 연료유가 분사될 수 있도록 DO용 분사노즐구(221)가 형성되어 있는 제2챔버(211)와, 상기 제1챔버(210)에 채워지는 연료유의 상호 압력차에 따라 상기 FO용 분사노즐구(220)를 개폐시켜주는 FO용 니들밸브(230)와, 상기 FO용 니들밸브(230)의 내부에 설치되어 상기 제1챔버(210)와 제2챔버(211)를 구획해주고 제2챔버(211)에 채워지는 연료유의 상호압력차에 따라 상하로 작동되어 상기 DO용 분사노즐구(221)를 개폐시켜주는 DO용 니들밸브(231)를 포함하여 구성된다. The nozzle unit 200 is connected to the FO fuel inlet 110 is filled with the FO fuel injected through the FO fuel inlet 110 to form an open pressure and the injection nozzle for FO so that the fuel oil can be injected ( 220 is formed in the first chamber 210, and formed in a concave shape in the lower portion of the first chamber 210 and connected to the DO fuel inlet 111 is injected through the DO fuel inlet 111 The opening pressure is formed by filling the DO fuel oil, and the second chamber 211 having the DO injection nozzle port 221 is formed so that the fuel oil can be injected therebetween, and the fuel oil filled in the first chamber 210. The FO needle valve 230 for opening and closing the FO injection nozzle port 220 and the FO needle valve 230 according to the pressure difference are installed in the first chamber 210 and the second chamber. Partition 211 and operate up and down according to the mutual pressure difference of the fuel oil filled in the second chamber (211). It is configured to include a needle valve 231 for DO that by opening and closing the opening (221) for the injection nozzle DO.

한편 상기 제1챔버(210)는, 상기 FO용 니들밸브(230)를 받쳐줄 수 있도록 하부에 오목한 형태의 받침턱(213)이 형성되고, 상기 받침턱(213)의 하측으로 상기 FO용 니들밸브(230)의 상승시 연료유가 이동할 수 있도록 유로(212)가 형성되며 상기 유로(212)에 연결되도록 FO용 분사노즐구(220)가 형성되어 있다.Meanwhile, the first chamber 210 has a concave support jaw 213 formed at a lower portion thereof to support the FO needle valve 230, and has a needle valve for the FO below the support jaw 213. A flow path 212 is formed to allow fuel oil to move when the 230 is raised, and an FO injection nozzle port 220 is formed to be connected to the flow path 212.

이러한 제1챔버(210)는 상기 FO용 니들밸브(230)가 상기 받침턱(213)에 걸려짐으로써 제1챔버(210)의 내부를 밀폐하고 제1챔버(210)에 채워지는 연료유에 의해 FO용 니들밸브(230)를 상승시키기 위한 개방 압력이 형성되며, FO용 니들밸브(230)가 상승함으로써 상기 유로(212)가 개방되어 FO용 분사노즐구(220)를 통해 FO 연료유가 분사된다.The first chamber 210 is sealed by the FO needle valve 230 by the support jaw 213 to seal the inside of the first chamber 210 by the fuel oil filled in the first chamber 210. An opening pressure for raising the FO needle valve 230 is formed, and the flow path 212 is opened by raising the FO needle valve 230 so that the FO fuel oil is injected through the FO injection nozzle port 220. .

한편 상기 DO용 니들밸브(231)의 내부 중심에는 제2챔버(211)로 연통되는 유로가 형성되어 제2챔버(211)의 내부에 연료유가 공급될 수 있도록 하고, 제2챔버(211)에 채워지는 연료유에 의해 개방 압력이 형성되어 DO용 니들밸브(231)를 상승시킴으로써 DO용 분사노즐구(221)가 개방되어 연료유가 분사된다.Meanwhile, a flow path communicating with the second chamber 211 is formed at an inner center of the DO needle valve 231 to allow fuel oil to be supplied into the second chamber 211 and to the second chamber 211. The opening pressure is formed by the fuel oil to be filled to raise the DO needle valve 231, so that the DO injection nozzle port 221 is opened to inject fuel oil.

한편 상기 분사밸브바디(100)의 내부에는 상기 FO용 니들밸브(230)를 가압해주는 FO용 스핀들(130) 및 상기 FO용 스핀들(130)에 탄성력을 제공하는 FO용 스프링(140)이 구비된다.On the other hand, the injection valve body 100 is provided with an FO spindle 130 for pressurizing the FO needle valve 230 and an FO spring 140 for providing an elastic force to the FO spindle 130. .

이렇게 FO용 스프링(140)의 탄성력에 의해 FO용 스핀들(130)이 FO용 니들밸브(230)를 가압해줌으로써 FO용 니들밸브(230)가 FO용 분사노즐구(220)를 밀폐할 수 있도록 하는 것이다.In this way, the FO spindle 130 presses the FO needle valve 230 by the elastic force of the FO spring 140 so that the FO needle valve 230 can seal the FO injection nozzle port 220. It is.

또한 상기 FO용 스핀들(130)의 내부에는 상기 DO용 니들밸브(231)를 가입해주는 DO용 스핀들(131)과, 상기 DO용 스핀들(131)의 상부에서 DO용 스핀들(131)에 탄성력을 제공하는 DO용 스프링(141)을 포함하여 구성된다.In addition, the inside of the FO spindle 130, the DO spindle 131 to join the DO needle valve 231, and provides an elastic force to the DO spindle 131 in the upper portion of the DO spindle 131. DO is configured to include a spring 141.

상기 DO용 스프링(141)의 탄성력에 의해 DO용 스핀들(131)이 DO용 니들밸브(231)를 가압해줌으로써 DO용 니들밸브(231)가 DO용 분사노즐구(220)를 밀폐할 수 있게 되는 것이다.The DO spindle 131 presses the DO needle valve 231 by the elastic force of the DO spring 141 so that the DO needle valve 231 can seal the DO injection nozzle 220. Will be.

한편 본 발명은 상기 분사밸브바디(100)에 제1고정너트(160)를 통해 체결되어 FO용 스프링(140)의 장력을 조절해주는 FO용 스프링 조정스크류(150)와, 상기 FO용 스프링 조정스크류(150)의 내부에 위치하고 제2고정너트(161)를 통해 분사밸브바디(100)에 고정되어 DO용 스프링(141)의 장력을 조절해주는 DO용 스프링 조정스크류(151)를 더 포함하여 구성된다.On the other hand, the present invention is fastened to the injection valve body 100 through the first fixing nut 160 to adjust the tension of the FO spring 140, FO spring adjustment screw 150, the FO spring adjustment screw Located in the interior of the 150 is fixed to the injection valve body 100 through the second fixing nut 161 is configured to further include a DO adjustment screw 151 for adjusting the tension of the spring for the DO 141. .

상기 FO용 스프링 조정스크류(150)와 DO용 스프링 조정 스크류(151)는 연료유의 원활한 분사가 이루어질 수 있도록 FO용 니들밸브(230) 및 DO용 니들밸브(231)를 개방하기 위한 압력과 대응하여 적절히 조절한다.The spring adjustment screw 150 for the FO and the spring adjustment screw 151 for the DO correspond to the pressure for opening the FO needle valve 230 and DO needle valve 231 to facilitate the injection of fuel oil Adjust appropriately.

한편 상기 FO용 분사노즐구(220)는 DO용 분사노즐구(221)에 비하여 직경이 크고, 수량도 다르게 구성할 수 있다.On the other hand, the FO injection nozzle hole 220 is larger in diameter than the DO nozzle nozzle 221, the number can be configured differently.

즉 FO용 분사노즐구(220)는 주분사용으로 GAS를 사용하지 않거나 고로드 필요시 사용하기 때문에 연료가 많아야 분사되어야 하며 이로 인해 노즐 구경이 크고 수량을 많이 형성한다.That is, the FO injection nozzle hole 220 is used when the fuel is not used or when the high load is required for main injection, so the fuel must be injected a lot, and thus the nozzle diameter is large and forms a large quantity.

또한 DO용 분사노즐구(221)은은 GAS의 점화용임으로 FO 연료의 1~2퍼센트 정도 소요(DO)됨으로 노즐구경과 수량이 FO용 분사노즐구(220)보다 작다.In addition, the DO injection nozzle 221 is for ignition of the GAS takes about 1-2% of the FO fuel (DO), the nozzle diameter and number is smaller than the FO injection nozzle (220).

이와 같이 구성되는 본 발명을 이용하여 FO 연료유를 분사하는 과정을 도 3을 통해 설명하면, 먼저 FO용 연료주입구(110)를 통해 분사밸브바디(100)의 내부로 FO연료가 주입되면 FO 연료유는 FO용 연료이송구(120)를 통해 제1챔버(210)로 공급된다.The process of injecting FO fuel oil using the present invention configured as described above will be described with reference to FIG. 3. First, when FO fuel is injected into the injection valve body 100 through the FO fuel inlet 110, the FO fuel is injected. The oil is supplied to the first chamber 210 through the fuel feed port 120 for the FO.

상기와 같이 제1챔버(210)로 FO 연료유가 공급되면 제1챔버(210)의 내부에 개방 압력이 형성되고, 이 개방 압력에 의해 FO용 스프링(140)에 의해 가압된 FO용 스핀들(130)을 밀어 올려 FO용 니들밸브(230)가 상승된다.When the FO fuel oil is supplied to the first chamber 210 as described above, an opening pressure is formed inside the first chamber 210, and the FO spindle 130 pressurized by the FO spring 140 by the opening pressure. ), The needle valve 230 for the FO is raised.

이렇게 FO용 니들밸브(230)가 상승되면 FO용 분사노즐구(220)가 개방되고 개방된 FO용 분사노즐구(220)를 통해 FO 연료유가 피스톤의 내부로 분사된다.When the FO needle valve 230 is raised in this way, the FO injection nozzle holes 220 are opened and the FO fuel oil is injected into the piston through the open FO injection nozzle holes 220.

또한 FO 연료유의 공급이 중단되면 제1챔버(210)의 내부에 FO 연료유가 공급되지 않아 개방 압력이 제거 되고, 이로 인해 FO용 스프링(140)에 의해 가압된 상태를 유지하는 FO용 스핀들(130)이 하강하고 FO용 스핀들(130)에 의해 FO용 니들밸브(230)가 하강하여 FO용 분사노즐구(220)를 밀폐하게 된다.
In addition, when the supply of the FO fuel oil is stopped, the FO fuel oil is not supplied to the inside of the first chamber 210 so that the opening pressure is removed, thereby maintaining the pressurized state by the FO spring 140. ) Is lowered and the FO needle valve 230 is lowered by the FO spindle 130 to seal the FO injection nozzle port 220.

한편 DO 연료유를 분사하는 과정을 도 4를 통해 설명하면, 상기 DO용 연료주입구(111)를 통해 분사밸브바디(100)의 내부로 DO 연료유가 주입되면 FO 연료유는 DO용 연료이송구(121)를 통해 제2챔버(211)로 공급된다.Meanwhile, referring to FIG. 4, a process of injecting DO fuel oil is performed. When DO fuel oil is injected into the injection valve body 100 through the DO fuel inlet 111, the FO fuel oil is a DO fuel feed port 121. It is supplied to the second chamber 211 through.

상기와 같이 제2챔버(211)로 공급되는 DO 연료유에 의해 제2챔버(211)의 내부에 개방 압력이 형성되면 DO용 스프링(141)에 의해 가압된 DO용 스핀들(131)을 밀어 올려 DO용 니들밸브(231)가 상승한다.When the opening pressure is formed inside the second chamber 211 by DO fuel oil supplied to the second chamber 211 as described above, the DO spindle 131 pushed up by the DO spring 141 is pushed up to DO. The needle valve 231 rises.

이렇게 DO용 니들밸브(231)가 상승되면 DO용 분사노즐구(221)가 개방되고 개방된 DO용 분사노즐구(221)를 통해 DO 연료유가 피스톤의 내부로 분사된다.When the DO needle valve 231 is raised in this way, the DO injection nozzle opening 221 is opened and the DO fuel oil is injected into the piston through the open DO injection nozzle opening 221.

또한 DO의 공급이 중단되면 제2챔버(211)의 내부에 DO 연료유가 공급되지 않아 개방 압력이 제거 되고, 이로 인해 DO용 스프링(141)에 의해 가압되는 DO용 스핀들(131)이 하강하고 하강된 DO용 스핀들(131)에 의해 DO용 니들밸브(231)가 하강하여 DO용 분사노즐구(221)를 밀폐하게 된다.
In addition, when the supply of DO is stopped, DO fuel oil is not supplied to the inside of the second chamber 211 so that the opening pressure is removed, thereby lowering and lowering the DO spindle 131 pressurized by the DO spring 141. The DO needle valve 231 is lowered by the DO spindle 131 to seal the DO injection nozzle port 221.

이와 같이 구성되는 본 발명은 엔진운전에서 고로드가 요구되는 경우 FO 연료의 사용시 FO용 펌프가 가동되어 FO의 분사가 이루어질 수 있도록 하고, 가스가 필요한 엔진 운전일 경우에는 DO용 펌프가 가동되어 DO의 분사가 이루어질 수 있도록 하는 것으로, 기존의 연료분사밸브 보다 컴팩트하고 2중 연료유를 사용함에 있어서도 각각의 연료를 분사 제어할 수 있게 되는 것이다.When the high load is required in the engine operation, the present invention configured as described above allows the FO pump to operate when the FO fuel is used, so that the FO injection can be performed, and the DO pump operates when the engine is required for gas. In order to be able to make the injection, it is possible to control the injection of each fuel even in a compact and double fuel oil than the conventional fuel injection valve.

본 발명은 상술한 특정의 바람직한 실시 예에 한정되지 아니하며, 청구범위에서 청구하는 본 발명의 요지를 벗어남이 없이 당해 발명이 속하는 기술분야에서 통상의 지식을 가진 자라면 누구든지 다양한 변형실시가 가능한 것은 물론이고, 그와 같은 변경은 청구범위 기재의 범위 내에 있게 된다.
The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

(100) : 분사밸브바디 (110) : FO용 연료주입구
(111) : DO용 연료주입구 (120) : FO용 연료이송구
(121) : DO용 연료이송구 (130) : FO용 스핀들
(131) : DO용 스핀들 (140) : FO용 스프링
(141) : DO용 스프링 (150) : FO용 스프링 조정스크류
(151) : DO용 스프링 조정스크류 (160) : 제1고정너트
(161) : 제2고정너트 (200) : 노즐부
(210) : 제1챔버 (211) : 제2챔버
(212) : 유로 (213) : 받침턱
(220) : FO용 분사노즐구 (221) : DO용 분사노즐구
(230) : FO용 니들밸브 (231) : DO용 니들밸브
(232) : 유로 (240) : FO용 스핀들
(241) : DO용 스핀들 (250) : FO용 스프링
(251) : DO용 스프링 (100): injection valve body (110): FO fuel inlet
(111): DO fuel inlet (120): FO fuel feed port
(121): DO fuel feed port (130): FO spindle
(131): DO spindle 140: FO spring
(141): DO spring (150): FO spring adjustment screw
(151): Spring adjustment screw for DO (160): First fixing nut
(161): second fixing nut (200): nozzle
210: first chamber 211: second chamber
212 Euro 213
220: jet nozzle for FO (221): jet nozzle for DO
230: FO Needle Valve 231: DO Needle Valve
(232): Euro 240: Spindle for FO
(241): DO spindle 250: FO spring
(251): DO spring

Claims (6)

FO용 연료주입구 및 DO용 연료주입구가 형성되어 있는 분사밸브바디와, 상기 분사밸브바디에 결합되고 연료유에 의한 개방압력이 형성됨으로써 니들을 들어올려 연료유가 분사되도록 하는 챔버가 형성되어 있는 노즐부를 포함하여 구성되는 연료분사밸브에 있어서,
상기 노즐부는,
상기 FO용 연료주입구에 유로를 통해 연결되어 FO가 채워짐으로써 개방 압력이 형성되고 연료유가 분사될 수 있도록 FO용 분사노즐구가 형성되어 있는 제1챔버;
상기 제1챔버의 하부에 오목한 형태로 형성되고 상기 DO용 연료주입구에 유로를 통해 연결되어 DO가 채워짐으로써 개방 압력이 형성되고 연료유가 분사될 수 있도록 DO용 분사노즐구가 형성되어 있는 제2챔버;
상기 제1챔버에 채워지는 연료유의 상호 압력차에 따라 상기 FO용 분사노즐구를 개폐시켜주는 FO용 니들밸브;
상기 FO용 니들밸브의 내부에 설치되어 상기 제1챔버와 제2챔버를 구획해주고 제2챔버에 채워지는 연료유의 상호압력차에 따라 상하로 작동되어 상기 DO용 분사노즐구를 개폐시켜주는 DO용 니들밸브를 포함하여 구성되는 것을 특징으로 하는 2중 연료분사밸브.
An injection valve body having a fuel inlet for FO and a fuel inlet for DO is formed, and a nozzle part coupled to the injection valve body and having a chamber configured to lift a needle to inject fuel oil by forming an open pressure by the fuel oil. In the fuel injection valve is configured to,
The nozzle unit,
A first chamber connected to the fuel inlet for the FO through a flow path to form an open pressure by filling the FO and injecting an FO injection nozzle therein to allow fuel oil to be injected;
The second chamber is formed in a concave shape in the lower portion of the first chamber and is connected to the DO fuel inlet through a flow path to fill the DO so that an open pressure is formed and a DO injection nozzle port is formed so that fuel oil can be injected. ;
A FO needle valve for opening and closing the FO injection nozzle port according to a mutual pressure difference between fuel oils filled in the first chamber;
The DO is installed inside the needle valve for FO to partition the first chamber and the second chamber and operate up and down according to the mutual pressure difference of the fuel oil filled in the second chamber to open and close the DO injection nozzle port. Double fuel injection valve comprising a needle valve.
제 1 항에 있어서,
상기 제1챔버는, 상기 FO용 니들밸브를 받쳐줄 수 있도록 하부에 받침턱이 형성되고, 상기 받침턱의 하측으로 FO용 니들밸브의 상승시 연료유가 이동할 수 있도록 유로가 형성되며, 상기 유로에 연결되도록 FO용 분사노즐구가 형성되도록 구성되어,
상기 FO용 니들밸브가 상기 받침턱에 걸려짐으로써 제1챔버의 내부를 밀폐하여 개방압력이 형성되고 개방압력에 의해 FO용 니들밸브가 상승되어 연료유가 FO용 분사노즐구를 통해 분사되는 것을 특징으로 하는 2중 연료분사밸브.
The method of claim 1,
The first chamber has a support jaw formed at a lower portion to support the FO needle valve, and a flow passage is formed to move fuel oil when the FO needle valve is raised below the support jaw, and is connected to the flow passage. FO injection nozzle is formed so that
The needle valve for the FO is caught by the support jaw to seal the inside of the first chamber to form an opening pressure, and the FO needle valve is raised by the opening pressure, so that fuel oil is injected through the FO injection nozzle port. Double fuel injection valve
제 1 항에 있어서,
상기 DO용 니들밸브의 내부에는 상기 제2챔버로 DO의 공급이 가능하도록 유로가 형성되어 있는 것을 특징으로 하는 2중 연료분사밸브.
The method of claim 1,
And a flow path is formed inside the DO needle valve to enable supply of DO to the second chamber.
제 1 항에 있어서,
상기 분사밸브바디의 내부에 설치되어 상기 FO용 니들밸브를 가압해주는 FO용 스핀들;
상기 FO용 스핀들에 탄성력을 제공해주는 FO용 스프링;
상기 FO용 스핀들의 내부에 설치되어 상기 DO용 니들밸브를 가압해주는 DO용 스핀들;
상기 DO용 스핀들에 탄성력을 제공하는 DO용 스프링;을 포함하여 구성되는 것을 특징으로 하는 2중 연료분사밸브.
The method of claim 1,
A FO spindle installed inside the injection valve body to pressurize the FO needle valve;
FO spring for providing an elastic force to the FO spindle;
A DO spindle installed inside the FO spindle to pressurize the DO needle valve;
Double fuel injection valve comprising a; spring for providing an elastic force to the DO spindle.
제 4 항에 있어서,
상기 분사밸브바디에 고정너트를 통해 체결되어 FO용 스프링의 장력을 조절해주는 FO용 스프링 조정스크류;
상기 FO용 스프링 조정스크류의 내부에 위치하고 고정너트를 통해 분사밸브바디에 고정되어 DO용 스프링의 장력을 조절해주는 DO용 스프링 조정스크류;를 포함하여 구성되는 것을 특징으로 하는 2중 연료분사밸브.
The method of claim 4, wherein
FO spring adjustment screw is fastened to the injection valve body through a fixing nut to adjust the tension of the FO spring;
And a spring adjustment screw for positioning the inside of the spring adjustment screw for the FO and fixed to the injection valve body through a fixing nut to adjust the tension of the spring for the DO. 2.
제 1 항에 있어서,
상기 FO용 분사노즐구는 DO용 분사노즐구에 비하여 큰 직경을 가지고 더 많은 개수로 형성되는 것을 특징으로 하는 2중 연료분사밸브.


The method of claim 1,
The FO injection nozzle port is a double fuel injection valve, characterized in that formed in a larger number and a larger diameter than the injection nozzle for DO.


KR1020100071496A 2010-07-23 2010-07-23 Dual fuel injection valve KR101158631B1 (en)

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WO2013188247A1 (en) * 2012-06-10 2013-12-19 Quantlogic Corporation Method, system, and fuel injector for multi-fuel injection with pressure intensification and a variable orifice
KR20150050373A (en) * 2013-10-30 2015-05-08 맨 디젤 앤드 터보 필리얼 아프 맨 디젤 앤드 터보 에스이 티스크랜드 A fuel valve for pilot oil injection and for injecting gaseous fuel into the combustion chamber of a self-igniting internal combustion engine
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WO2013188247A1 (en) * 2012-06-10 2013-12-19 Quantlogic Corporation Method, system, and fuel injector for multi-fuel injection with pressure intensification and a variable orifice
KR20150050373A (en) * 2013-10-30 2015-05-08 맨 디젤 앤드 터보 필리얼 아프 맨 디젤 앤드 터보 에스이 티스크랜드 A fuel valve for pilot oil injection and for injecting gaseous fuel into the combustion chamber of a self-igniting internal combustion engine
CN106677945A (en) * 2016-07-12 2017-05-17 江西汇尔油泵油嘴有限公司 Segmented oil spraying oil nozzle and segmented oil spraying method
CN106677945B (en) * 2016-07-12 2019-07-05 江西汇尔油泵油嘴有限公司 The atomizer of oil spout and stage by stage fuel injecting method stage by stage

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