KR101129887B1 - Dual fuel injection valve - Google Patents

Dual fuel injection valve Download PDF

Info

Publication number
KR101129887B1
KR101129887B1 KR1020100077292A KR20100077292A KR101129887B1 KR 101129887 B1 KR101129887 B1 KR 101129887B1 KR 1020100077292 A KR1020100077292 A KR 1020100077292A KR 20100077292 A KR20100077292 A KR 20100077292A KR 101129887 B1 KR101129887 B1 KR 101129887B1
Authority
KR
South Korea
Prior art keywords
fuel oil
fuel
needle
injection
oil
Prior art date
Application number
KR1020100077292A
Other languages
Korean (ko)
Other versions
KR20120015062A (en
Inventor
하은
김응성
김주태
김종석
허광철
정강윤
박득진
노범용
Original Assignee
현대중공업 주식회사
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 현대중공업 주식회사 filed Critical 현대중공업 주식회사
Priority to KR1020100077292A priority Critical patent/KR101129887B1/en
Publication of KR20120015062A publication Critical patent/KR20120015062A/en
Application granted granted Critical
Publication of KR101129887B1 publication Critical patent/KR101129887B1/en

Links

Images

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
    • 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
    • F02D19/0602—Control of components of the fuel supply system
    • F02D19/0613—Switch-over from one fuel to another
    • 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
    • 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
    • Y02T10/30—Use of alternative fuels, e.g. biofuels

Landscapes

  • 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

본 발명은 듀얼 퓨얼 연료분사밸브에 관한 것으로, 그 목적은 점화용 MDO 의 분사압력을 제 1연료인 HFO의 분사압력을 이용하여 만들어 주도록 하여, 별도의 연료분사펌프가 없는 듀얼 퓨얼 연료분사밸브를 제공하는 것이다.
본 발명은 제1연료유 분사노즐부를 통해 제1연료유가 분사되고, 제2연료유 분사노즐부를 통헤 제2연료유가 분사되는 마이크로 파일럿(micro pilot) 타입의 듀얼 퓨얼(dual fuel) 엔진용 연료분사밸브에 있어서;
연료분사펌프에 의해 가압된 제1연료유가 제2연료 분사노즐부의 제2연료유 가압피스톤을 가압한 후, 제1연료유 분사노즐부의 제1연료 포켓으로 공급되고,
제1연료유의 가압에 의한 제2연료유 가압피스톤의 작동에 의해 제2연료유가 제2연료 니들을 통해 제2연료 포켓으로 이동되어 제2연료 니들을 상승시킴으로써 제2연료유가 분사되며,
제1연료유 분사노즐부의 제1연료 포켓으로 공급된 제1연료의 압력정도에 따라 제1연료유가 제1연료유 니들을 상승시켜 제1연료유가 분사되도록 구성되어 있다. The present invention relates to a dual fuel fuel injection valve, the object of which is to make the injection pressure of the ignition MDO by using the injection pressure of the first fuel HFO, to provide a dual fuel fuel injection valve without a separate fuel injection pump To provide.
The present invention provides a fuel injection for a micro pilot type dual fuel engine in which a first fuel oil is injected through a first fuel oil injection nozzle and a second fuel oil is injected through a second fuel oil injection nozzle. In a valve;
The first fuel oil pressurized by the fuel injection pump pressurizes the second fuel oil pressurized piston of the second fuel injection nozzle part, and then is supplied to the first fuel pocket of the first fuel oil injection nozzle part,
By operating the second fuel oil pressurized piston by pressurization of the first fuel oil, the second fuel oil is moved to the second fuel pocket through the second fuel needle and the second fuel needle is injected by raising the second fuel needle,
According to the pressure of the first fuel supplied to the first fuel pocket of the first fuel oil injection nozzle part, the first fuel oil is raised so that the first fuel oil is injected to the first fuel oil.

Description

듀얼 퓨얼 연료분사밸브{Dual fuel injection valve}Dual fuel injection valve

본 발명은 듀얼 퓨얼 연료분사밸브에 관한 것으로, 제1연료와 제2연료를 사용하는 듀얼 퓨어용 연료분사밸브 내부의 구조변화를 통하여, 제1연료유의 분사압력을 이용하여 제2연료유(가스점화유)를 가압 분사시킬 수 있는 듀얼 퓨얼 연료분사밸브에 관한 것이다.
The present invention relates to a dual fuel fuel valve, the second fuel oil (gas by using the injection pressure of the first fuel oil through a structural change in the dual fuel fuel injection valve using the first fuel and the second fuel) It relates to a dual fuel injection valve that can pressurize (ignition oil).

일반적인 듀얼 퓨얼(dual fuel)용 연료유 분사밸브는 독립된 2개의 연료유 분사밸브로 구성이 되어 있다. 제1 연료(일반적으로 HFO)를 분사하는 인젝터와 제2 연료인 가스 사용 시 이의 점화목적으로 사용되는 연료유(주로 MDO)를 분사하는 인젝터가 그것이다. 이때, 가스의 점화목적으로 사용되는 인젝터는 극소량의 연료유를 극히 짧은 시간 내에 분사시켜주어야 하므로 일반적으로 전자제어식 인젝터를 사용하고 있으나 그 가격이 비싸다는 단점이 있다. A typical fuel oil injection valve for dual fuel consists of two independent fuel oil injection valves. These include injectors for injecting a first fuel (generally HFO) and injectors for injecting fuel oil (primarily MDO) used for its ignition purpose when using a gas which is a second fuel. In this case, the injector used for the ignition of the gas is generally used an electronically controlled injector because very small amount of fuel oil must be injected in a very short time, but the price is expensive.

엔진의 주 사용처가 다양한 부하영역 대에서 운전이 될 경우 전자식 인젝터의 사용이 합당하나 고정부하에서 주로 사용이 될 경우 전자식 인젝터는 가격 대비 그 효용성이 낮다고 볼 수 있다. 따라서 가스 점화용 인젝터를 기계식으로 구동하는 경우도 있으나, 기존의 기계식 인젝터의 경우 이를 구동하기 위한 기계식 연료분사펌프가 별도로 설치되어야 한다. 즉 제 1 연료인 HFO 용 연료분사펌프와 가스 점화용 연료인 MDO 용 연료분사펌프가 독립적으로 설치가 되어야 했다. 즉, Micro pilot 타입의 dual fuel 엔진에 들어가는 기계식 연료유 분사밸브는 종래에는 HFO 용과 MDO 용이 따로 구성이 되어 있으며 MDO 를 가압하기 위한 연료분사펌프 및 고압관도 있어야 하므로, 크기가 늘어나고, 구조가 복잡해지며, 비용이 증가되는 등 여러가지 문제점이 있었다.
If the main use of the engine is operating in various load ranges, the use of the electronic injector is reasonable, but if it is mainly used at a fixed load, the electronic injector is less useful for the price. Therefore, the gas ignition injector may be driven mechanically, but in the case of a conventional mechanical injector, a mechanical fuel injection pump for driving the gas injector should be separately installed. That is, the HFO fuel injection pump and the gas ignition fuel MDO fuel injection pump had to be installed independently. In other words, the mechanical fuel oil injection valve in the micro pilot type dual fuel engine is conventionally configured for HFO and MDO easily, and also requires a fuel injection pump and a high-pressure pipe to pressurize the MDO. There are various problems such as increased cost.

본 발명은 상기와 같은 문제점을 해소하기 위한 것으로, 그 목적은 점화용 MDO 의 분사압력을 제 1연료인 HFO의 분사압력을 이용하여 만들어 주도록 하여, 별도의 연료분사펌프가 없는 듀얼 퓨얼 연료분사밸브를 제공하는 것이다. The present invention is to solve the above problems, the purpose is to make the injection pressure of the ignition MDO by using the injection pressure of the first fuel HFO, dual fuel fuel injection valve without a separate fuel injection pump To provide.

본 발명의 또다른 목적은 기계식 dual fuel 인젝터에 필요한 분사펌프 및 고압파이프를 생략하여, 구조를 단순화하여, 크기의 소형화 및 무게를 줄이고, 비용을 절감시킬 수 있는 듀얼 퓨얼 연료분사밸브를 제공하는 것이다.
Still another object of the present invention is to provide a dual fuel fuel injection valve which can reduce the size, reduce the size, and reduce the cost by simplifying the structure by omitting the injection pump and the high pressure pipe required for the mechanical dual fuel injector. .

본 발명은 제1연료유를 분사하는 제1연료유 분사노즐부와, 제2연료유를 분사하는 제2연료유 분사노즐부로 구성된 마이크로 파일럿(micro pilot) 타입의 듀얼 퓨얼(dual fuel) 엔진용 연료분사밸브에 있어서;The present invention relates to a micro pilot type dual fuel engine comprising a first fuel oil injection nozzle part for injecting a first fuel oil and a second fuel oil injection nozzle part for injecting a second fuel oil. A fuel injection valve;

상기 제2연료유 분사노즐부는 상부로 공급되는 제1연료유에 의해 작동되는 제2연료유 가압피스톤과, 상기 제2연료유 가압피스톤 하부에 위치하고 분사밸브몸체에 설치된 노즐내에 위치하는 제2연료유 니들과, 상기 제2연료유 니들 상측에 위치하는 제2연료유 니들스프링과, 상기 제2연료유 가압피스톤이 관통되어 설치되는 가압피스톤 스프링과, 상기 가압피스톤 스프링과 니들 스프링 사이에 위치하도록 분사밸브몸체와 노즐 사이에 설치되는 기밀대와, 제2연료유 니들을 통해 제2연료유가 공급되는 제2연료유 포켓을 포함하고, The second fuel oil injection nozzle part includes a second fuel oil pressurized piston operated by the first fuel oil supplied to the upper part, and a second fuel oil located under the second fuel oil pressurized piston and positioned in a nozzle installed in the injection valve body. A needle, a second fuel oil needle spring positioned above the second fuel oil needle, a pressurized piston spring installed through the second fuel oil pressurized piston, and sprayed to be positioned between the pressurized piston spring and the needle spring An airtight belt installed between the valve body and the nozzle, and a second fuel oil pocket supplied with the second fuel oil through the second fuel oil needle,

상기 제1연료유 분사노즐부는 분사밸브몸체내에 설치되는 제1연료유 니들스프링과, 상기 제1연료유 니들스프링 하단에 위치하는 스핀들과, 상기 스핀들 하단에 위치하고 분사밸브몸체에 연결된 노즐내에 설치되는 제1연료유 니들과, 상기 제1연료유 니들이 위치한 노즐내에 설치되고 제2연료유 가압피스톤 상부로 공급된 제1연료유가 공급되는 제1연료유 포켓을 포함하도록 되어 있다.
The first fuel oil injection nozzle unit is installed in the first fuel oil needle spring installed in the injection valve body, the spindle located at the lower end of the first fuel oil needle spring, and the nozzle located at the lower end of the spindle and connected to the injection valve body. The first fuel oil needle and the first fuel oil pocket is installed in the nozzle in which the first fuel oil needle is located and the first fuel oil pocket supplied with the first fuel oil supplied to the upper portion of the second fuel oil pressurized piston.

이와 같이 본 발명은 점화용 MDO 의 분사압력을 제 1연료인 HFO의 분사압력을 이용하여 만들어주게 되므로 별도의 연료분사펌프가 필요가 없고, 별도의 연료분사펌프의 생략으로 인하여 고압 MDO 이송파이프 또한 필요가 없으며 , MDO 용 연료분사펌프를 구동하기 위한 캠이 생략되어 이의 설치를 위한 공간도 줄어들게 되는 효과가 있다. As such, the present invention does not require a separate fuel injection pump because the injection pressure of the ignition MDO is made using the injection pressure of the HFO, which is the first fuel, and the high pressure MDO transfer pipe is also omitted due to the omission of a separate fuel injection pump. There is no need, and the cam for driving the fuel injection pump for MDO is omitted, thereby reducing the space for its installation.

또한, 본 발명은 MDO 의 가압이 HFO 압력을 이용하여 본 분사밸브 내에서 이루어지므로 HFO 모드에서 MDO의 분사가 HFO 분사 이전에 이루어져, pre-injection 을 하는 효과도 볼 수 있는 등 많은 효과가 있다.
In addition, in the present invention, since the pressurization of the MDO is made in the main injection valve using the HFO pressure, the injection of the MDO in the HFO mode is performed before the HFO injection, so that the effect of pre-injection can be seen.

도 1 은 본 발명에 따른 구성을 보인 예시도
도 2 는 본 발명에 따른 동작상태를 보인 예시도(HFO 모드 분사)
도 3 은 본 발명에 따른 동작상태를 보인 예시도(가스모드 분사)
도 4 는 본 발명에 따른 HFO 모드 동작시 압력 및 니들 움직임을 보인 예시도
도 5 는 본 발명에 따른 가스 모드 동작시 압력 및 니들 움직임을 보인 예시도1 is an illustration showing a configuration according to the present invention;
2 is an exemplary view showing an operating state according to the present invention (HFO mode injection)
3 is an exemplary view showing an operating state according to the present invention (gas mode injection)
4 is an exemplary view showing pressure and needle movement during HFO mode operation according to the present invention.
5 is an exemplary view showing pressure and needle movement during gas mode operation according to the present invention.

듀얼 퓨얼(Dual fuel)엔진은 2종류의 연료를 번갈아 사용하는 엔진을 말하며, 통상 HFO 와 천연가스를 그 연료로 사용한다. HFO 사용 시(HFO 모드)에는 일반적으로 HFO 를 사용하는 디젤엔진과 점화원리가 같다. 가스 사용 시(가스 모드)에는 압축된 가스의 점화방식에 따라 점화플러그 방식과 micro pilot 방식이 있는데, 본 발명은 micro pilot 타입의 dual fuel 엔진에 적용 가능한 발명이다. Dual fuel engine refers to an engine that uses two fuels alternately. Usually, HFO and natural gas are used for the fuel. When using HFO (HFO mode), the ignition principle is generally the same as for diesel engines using HFO. When the gas is used (gas mode), there is a spark plug method and a micro pilot method according to the ignition method of the compressed gas. The present invention is an invention applicable to a micro pilot type dual fuel engine.

상기 Micro pilot 방식은 피스톤이 가스를 압축시킬 때 극소량의 연료유(MDO)를 분사시켜 고온의 가스가 본 연료유를 발화시키고(압축착화) 이 불꽃이 다시 압축된 가스를 점화시키는 방식이다. 이때 사용되는 연료유는 그 양이 극히 적어야 가스 모드의 효능을 발휘할 수 있으며, 불필요한 연료유의 낭비도 줄이게 된다. 극히 적은 양의 연료유를 분사하기 위해 인젝터는 분사공의 크기가 매우 작을 수밖에 없다. 엔진이 HFO 모드에서 운전 시 가스점화용 인젝터가 동작을 하지 않고 있으면 작은 분사공이 HFO 및 그 연소화합물로 인하여 막힐 가능성이 있고, 만약 분사공이 막히게 되면 가스모드로 전환 시 가스를 점화시킬 수 없다. 따라서 가스 점화용 인젝터는 가스모드와 HFO 모드 모두 상시 분사가 이루어져야 한다.
In the micro pilot method, when a piston compresses gas, a very small amount of fuel oil (MDO) is injected, so that hot gas ignites the present fuel oil (compression compression), and the spark ignites the compressed gas again. At this time, the amount of fuel oil to be used is extremely small can exhibit the efficacy of the gas mode, and also reduce unnecessary fuel oil waste. In order to inject a very small amount of fuel oil, the injector must be very small in size. If the gas ignition injector is not operating when the engine is operating in HFO mode, then a small injection hole may be blocked by the HFO and its combustion compounds. Therefore, the gas ignition injector should always be injected in both gas mode and HFO mode.

이하, 본 발명을 첨부된 도면에 의해 상세히 설명하면 다음과 같다. Hereinafter, described in detail by the accompanying drawings of the present invention.

도 1 은 본 발명에 따른 내부구성을 보인 예시도를, 도 2 는 본 발명에 따른 동작상태를 보인 예시도(HFO 모드 분사)를, 도 3 은 본 발명에 따른 동작상태를 보인 예시도(가스모드 분사)를 도시한 것으로, 1 is an exemplary view showing an internal configuration according to the present invention, Figure 2 is an exemplary view showing an operating state according to the present invention (HFO mode injection), Figure 3 is an exemplary view showing an operating state according to the present invention (gas Mode injection)

본 발명은 제1연료유 분사노즐부(10)를 통해 제1연료유(HFO)가 분사되고, 제2연료유 분사노즐부(20)를 통해 제2연료유(MDO)가 분사되는 마이크로 파일럿(micro pilot) 타입의 듀얼 퓨얼(dual fuel) 엔진용 연료분사밸브에 있어서;In the present invention, the first fuel oil (HFO) is injected through the first fuel oil injection nozzle unit 10, the second pilot oil (MDO) is injected through the second fuel oil injection nozzle unit 20 A fuel injection valve for a dual fuel engine of a micro pilot type;

연료분사펌프(도시없음)에 의해 가압된 제1연료유(HFO)가 제2연료 분사노즐부(20)의 제2연료유 가압피스톤(21)을 가압한 후, 제1연료유 분사노즐부(10)의 제1연료 포켓(13)으로 공급되고, The first fuel oil (HFO) pressurized by the fuel injection pump (not shown) presses the second fuel oil pressurized piston 21 of the second fuel injection nozzle part 20, and then the first fuel oil injection nozzle part Supplied to the first fuel pocket 13 of (10),

제1연료유의 가압에 의한 제2연료유 가압피스톤(21)의 작동에 의해 제2연료유가 제2연료 니들(22)을 통해 제2연료 포켓(23)으로 이동되어 제2연료 니들(22)을 상승시킴으로써 제2연료유가 분사되며,By the operation of the second fuel oil pressurized piston 21 by the pressurization of the first fuel oil, the second fuel oil is moved to the second fuel pocket 23 through the second fuel needle 22 to the second fuel needle 22. To raise the second fuel oil,

제1연료유 분사노즐부(10)의 제1연료 포켓(13)으로 공급된 제1연료의 압력정도에 따라 제1연료유(HFO)가 제1연료유 니들(12)을 상승시켜 제1연료유(HFO)가 분사되도록 되어 있다.
The first fuel oil HFO raises the first fuel oil needle 12 according to the pressure of the first fuel supplied to the first fuel pocket 13 of the first fuel oil injection nozzle unit 10. Fuel oil (HFO) is to be injected.

즉, 본 발명은 제1연료유를 분사하는 제1연료유 분사노즐부(10)와, 제2연료유를 분사하는 제2연료유 분사노즐부(20)를 구비한 마이크로 파일럿(micro pilot) 타입의 듀얼 퓨얼(dual fuel) 엔진용 연료분사밸브에 있어서;That is, the present invention provides a micro pilot having a first fuel oil injection nozzle unit 10 for injecting a first fuel oil and a second fuel oil injection nozzle unit 20 for injecting a second fuel oil. A fuel injection valve for a dual fuel engine of the type;

상기 제2연료유 분사노즐부(20)는 상부로 공급되는 제1연료유에 의해 작동되는 제2연료유 가압피스톤(21)과, 상기 제2연료유 가압피스톤 하부에 위치하고 분사밸브몸체에 설치된 노즐내에 위치하는 제2연료유 니들(22)과, 상기 제2연료유 니들 상측에 위치하는 제2연료유 니들스프링(24)과, 상기 제2연료유 가압피스톤이 관통되어 설치되는 가압피스톤 스프링(25)과, 상기 가압피스톤 스프링(25)과 제2연료유 니들 스프링(24) 사이에 위치하도록 분사밸브몸체(30)와 노즐(40) 사이에 설치되는 기밀대(26)와, 제2연료유 니들(22)을 통해 제2연료유가 공급되는 제2연료유 포켓(23)을 포함하고, The second fuel oil injection nozzle unit 20 includes a second fuel oil pressurized piston 21 operated by the first fuel oil supplied to the upper portion, and a nozzle disposed below the second fuel oil pressurized piston and installed in the injection valve body. A pressurized piston spring in which a second fuel oil needle 22 positioned therein, a second fuel oil needle spring 24 positioned above the second fuel oil needle, and the second fuel oil pressurized piston are installed. 25, an airtight zone 26 provided between the injection valve body 30 and the nozzle 40 so as to be located between the pressurized piston spring 25 and the second fuel oil needle spring 24, and the second fuel. A second fuel oil pocket 23 through which the second fuel oil is supplied through the needle 22;

상기 제1연료유 분사노즐부(10)는 분사밸브몸체(30)내에 설치되는 제1연료유 니들스프링(14)과, 상기 제1연료유 니들스프링(14) 하단에 위치하는 스핀들(15)과, 상기 스핀들 하단에 위치하고 분사밸브몸체(30)에 연결된 노즐(40)내에 설치되는 제1연료유 니들(12)과, 상기 제1연료유 니들(12)이 위치한 노즐내에 설치되고 제2연료유 가압피스톤 상부로 공급된 제1연료유가 공급되는 제1연료유 포켓(13)을 포함하도록 되어 있다.
The first fuel oil injection nozzle unit 10 includes a first fuel oil needle spring 14 installed in the injection valve body 30 and a spindle 15 positioned at a lower end of the first fuel oil needle spring 14. And a first fuel needle 12 disposed in the nozzle 40 positioned at the lower end of the spindle and connected to the injection valve body 30, and installed in the nozzle in which the first fuel oil needle 12 is positioned and in the second fuel. And a first fuel oil pocket 13 to which the first fuel oil supplied to the oil pressurized piston is supplied.

이때, 상기 제1연료유 분사노즐부(10)와 제2연료유 분사노즐부(20)는 하나의 분사밸브몸체(30) 및 이에 결합되는 노즐(40)내에 설치되어 있다.
In this case, the first fuel oil injection nozzle unit 10 and the second fuel oil injection nozzle unit 20 are installed in one injection valve body 30 and a nozzle 40 coupled thereto.

상기 제2연료유 가압피스톤(21)은 분사밸브몸체(30)내에 형성된 가압피스톤홀(31)내에 상측이 위치하고 하측이 노즐(40)내에 설치되는 제2연료유 니들(22)내로 삽입되도록 설치되며, 상기 가압피스톤홀(31)내에 위치하는 상측(211)의 단면적이 제2연료유 니들(22)내로 삽입되는 하측(212)의 단면적보다 크도록 형성되어 있다.
The second fuel oil pressurized piston 21 is installed so that the upper side is positioned in the pressurized piston hole 31 formed in the injection valve body 30 and the lower side is inserted into the second fuel oil needle 22 installed in the nozzle 40. The cross-sectional area of the upper side 211 located in the pressure piston hole 31 is formed to be larger than the cross-sectional area of the lower side 212 inserted into the second fuel needle 22.

상기 제2연료유 니들(22)은 상부 중앙에 제2연료유 가압피스톤(21)이 삽입되는 중앙홀(221)과, 상기 중앙홀(221)과 연통되고 중앙홀내로 제2연료유를 공급하는 다수개의 제1공급유로(222)와, 상기 중앙홀과 일측이 연통되고 타측이 제2연료유 포켓과 연통되는 다수개의 제2공급유로(223)를 포함한다.
The second fuel oil needle 22 communicates with the central hole 221 into which the second fuel oil pressurizing piston 21 is inserted into the upper center, and communicates with the central hole 221 and supplies the second fuel oil into the central hole. A plurality of first supply passages 222 and a plurality of second supply passages 223 in which one side is in communication with the central hole and the other side is in communication with the second fuel oil pocket.

상기 제2연료유 니들스프링(24)은 일측이 기밀대(26)에 접촉되고 타측이 제2연료유 니들(22) 상단에 접촉되도록 노즐에 형성된 제2연료유 공급홀(41)내에 설치된다. 이때, 상기 제2연료유 공급홀(41)내로는 제2연료유(MDO)가 공급된다. The second fuel oil needle spring 24 is installed in the second fuel oil supply hole 41 formed in the nozzle such that one side is in contact with the airtight zone 26 and the other side is in contact with the upper end of the second fuel oil needle 22. . At this time, the second fuel oil (MDO) is supplied into the second fuel oil supply hole 41.

상기 가압피스톤 스프링(25)은 일측이 제2연료유 가압피스톤(21) 상측 하단에 접촉되고 타측이 기밀대(26)에 접촉되도록 분사밸브몸체(30)내에 형성된 가압피스톤홀(31)내에 설치된다. The pressurized piston spring 25 is installed in the pressurized piston hole 31 formed in the injection valve body 30 so that one side is in contact with the lower end of the upper side of the second fuel oil pressurized piston 21 and the other side is in contact with the airtight zone 26. do.

상기 기밀대(26)는 분사밸브몸체(30)와 노즐(40) 사이에 위치하도록 즉, 가압피스톤홀(31)과 제2연료유 공급홀(41) 사이에 위치하도록 설치된다. The airtight zone 26 is installed to be positioned between the injection valve body 30 and the nozzle 40, that is, between the pressurized piston hole 31 and the second fuel oil supply hole 41.

이때, 상기 제2연료유 가압피스톤(21)은 가압피스톤 스프링(25)과 기밀대(26) 및 제2연료유 니들스프링(24)을 관통하여 제2연료유 니들의 중앙홀(221)내로 하단이 삽입되게 설치된다.
At this time, the second fuel oil pressurized piston 21 passes through the pressurized piston spring 25, the airtight zone 26, and the second fuel oil needle spring 24 into the central hole 221 of the second fuel oil needle. The bottom is installed to be inserted.

상기와 같이 구성된 제2연료 분사노즐부(20)는 제2연료유 공급홀(41)내로 공급된 제2연료유(MDO)가 제2연료유 니들의 제1공급유로(222)를 통해 중앙홀(221) 및 제2공급유로(223)을 통해 제2연료유 포켓(23)으로 공급되고, 중앙홀(221) 및 제2연료유 포켓(23)으로 공급된 제2연료유(MDO)는 제2연료유 가압피스톤(21)의 가압에 의해 고압으로 압축되어 제2연료유 니들(22)을 상승시켜 제2연료유가 분사된다.
In the second fuel injection nozzle unit 20 configured as described above, the second fuel oil (MDO) supplied into the second fuel oil supply hole 41 is centered through the first supply passage 222 of the second fuel oil needle. The second fuel oil (MDO) supplied to the second fuel oil pocket 23 through the hole 221 and the second supply passage 223 and supplied to the central hole 221 and the second fuel oil pocket 23. The second fuel oil is compressed to a high pressure by the pressurization of the pressurized piston 21 to raise the second fuel oil needle 22, the second fuel oil is injected.

상기 제1연료유 분사노즐부(10)는 연료분사펌프(도시없음)에 의해 가압된 고압의 제1연료유(HFO)가 제2연료유 분사노즐부(20)를 통해 제1연료유 포켓(13)으로 공급되고, 제1연료유 포켓(13)으로 공급된 제1연료유(HFO)의 압력에 의해 제1연료유 니들(12)을 상승시켜 제1연료유(HFO)가 분사된다. The first fuel oil injection nozzle unit 10 is a high-pressure first fuel oil (HFO) pressurized by a fuel injection pump (not shown) through the second fuel oil injection nozzle unit 20 through the first fuel oil pocket The first fuel oil needle 12 is raised by the pressure of the first fuel oil HFO supplied to the first fuel oil pocket 13, and the first fuel oil HFO is injected. .

이때, 상기 제1연료유 분사노즐부의 제1연료유 니들스프링, 스핀들, 제1연료유 니들에 대한 구성은 공지 또는 주지의 기술수단이므로, 이에 대한 상세한 설명은 생략한다.
At this time, since the configuration of the first fuel oil needle spring, the spindle, the first fuel oil needle of the first fuel oil injection nozzle portion is known or well-known technical means, a detailed description thereof will be omitted.

또한, 도 1 은 본 발명에 따른 내부구성을 보인 예시도를 도시한 것으로, 제1연료유(HFO) 및 제2연료유(MDO)의 이동경로는 보이지 않으므로 선으로 대략적인 이동경로만 표기되어 있으며, 이때, 제2연료유(MDO)는 상시 공급압력인 8 bar 이고, 제1연료유(HFO)는 연료분사펌프와 연결되어 있어 그 압력이 펌프의 동작에 따라 최대 1400 bar 까지 변하게 되며, 제1연료유과 제2연료유의 분사 즉, 분사밸브가 동작 하기 전에는 제1연료유(HFO) 및 제2연료유(MDO)는 상시 노즐의 포켓까지 채워져 있다.
In addition, Figure 1 shows an exemplary view showing an internal configuration according to the present invention, since the movement path of the first fuel oil (HFO) and the second fuel oil (MDO) is not visible, only a rough movement path is indicated by a line. In this case, the second fuel oil (MDO) is a constant supply pressure of 8 bar, the first fuel oil (HFO) is connected to the fuel injection pump, the pressure is changed up to 1400 bar according to the operation of the pump, Before the injection of the first fuel oil and the second fuel oil, that is, the injection valve, the first fuel oil (HFO) and the second fuel oil (MDO) are always filled to the pocket of the nozzle.

이하, 본 발명을 제1연료유의 분사모드(HFO 모드) 및 제2연료유의 분사모드(MDO모드)에 따른 작동을 설명하면 다음과 같다.
Hereinafter, the present invention will be described in accordance with the operation according to the injection mode of the first fuel oil (HFO mode) and the injection mode of the second fuel oil (MDO mode) as follows.

HFOHFO 모드mode

도 2 는 본 발명에 따른 동작상태를 보인 예시도(HFO 모드 분사)를 도시한 것으로, HFO 모드에서는 점화유(MDO)및 제 1연료유(HFO) 가 동시 분사가 이루어진다. 먼저 제1연료유의 연료분사펌프가 제1연료유를 가압하게 되면 고압의 제1연료유가 가압피스톤홀내로 흘러 들어온다. 이때, 제1연료유는 제2연료유 가압피스톤을 지나면서 제2연료유 가압피스톤을 하강시킨다. 제2연료유 가압피스톤이 하강함에 따라 제2연료유 니들 상부의 제2연료유는 압축이 되기 시작한다. 이때, 제2연료유 가압피스톤은 상부면적이 하부면적보다 크게 설계가 되어 있어 상대적으로 저압의 제1연료유 압력으로도 제2연료유를 고압으로 압축시킬 수 있다. 고압으로 압축된 제2연료유는 적정 압력이상이 되면 제2연료유 니들이 상승하면서 분사가 이루어진다. Figure 2 shows an exemplary view showing the operating state (HFO mode injection) according to the present invention, the ignition oil (MDO) and the first fuel oil (HFO) is simultaneously injected in the HFO mode. First, when the fuel injection pump of the first fuel oil pressurizes the first fuel oil, the high pressure first fuel oil flows into the pressurized piston hole. At this time, the first fuel oil descends the second fuel oil pressurized piston while passing through the second fuel oil pressurized piston. As the second fuel oil pressurized piston descends, the second fuel oil above the second fuel oil needle begins to be compressed. At this time, the second fuel oil pressurized piston is designed to have an upper area larger than the lower area, thereby compressing the second fuel oil at a high pressure even with a relatively low pressure of the first fuel oil. When the second fuel oil compressed at high pressure is higher than the appropriate pressure, the second fuel oil needle is raised and sprayed.

또한, 제1연료유의 압력은 지속적으로 상승하며 제1연료유 포켓으로 공급된 제1연료유 압력이 일정 압력 이상으로 상승하면 제1연료유 니들이 상승하여 제1연료유의 분사가 이루어진다. In addition, the pressure of the first fuel oil continuously rises and when the pressure of the first fuel oil supplied to the first fuel oil pocket rises above a predetermined pressure, the first fuel oil needle rises to inject the first fuel oil.

또한, 연료분사펌프로부터 압축이 끝나 제1연료유의 압력이 감소하면 제1연료유 니들 및 제2연료유 니들이 하강하여 닫혀 분사가 끝나게 되며 제2연료유 가압피스톤도 제2연료유 가압피스톤 스프링에 의해 원상태로 돌아가게 된다.
In addition, when the pressure of the first fuel oil decreases after the compression is completed from the fuel injection pump, the first fuel oil needle and the second fuel oil needle are lowered and closed, so that the injection is completed. Return to its original state.

가스 gas 모드mode

도 3 은 본 발명에 따른 동작상태를 보인 예시도(가스모드 분사)를 도시한 것으로, 가스 모드에서는 제1연료유 연료분사 펌프가 가압하는 제1연료유의 양 및 압력을 줄이게 된다. 최대 압력이 제1연료유 니들이 열리지 않을 정도로 제한되나 이 압력으로도 제2연료유 니들은 동작하게 된다. 즉, 제1연료유 연료분사펌프가 저압으로 제1연료유를 가압하여 가압피스톤홀 및 제1연료유 포켓내로 이송한다. 이때 제1연료유 압력은 제1연료유 니들이 열릴 정도의 압력은 되지 않으므로 제1연료유의 분사는 이루어지지 않는다. 그러나 본 압력은 제2연료유 가압피스톤을 하강시켜 제2연료유를 가압하게 되고 제2연료유 니들이 상승하여 제2연료유의 분사가 이루어지게 된다.
Figure 3 shows an exemplary view (gas mode injection) showing an operating state according to the present invention, in the gas mode to reduce the amount and pressure of the first fuel oil pressurized by the first fuel oil fuel injection pump. The maximum pressure is limited so that the first fuel unit does not open, but at this pressure the second fuel unit operates. That is, the first fuel oil fuel injection pump pressurizes the first fuel oil at low pressure and transfers it into the pressurized piston hole and the first fuel oil pocket. At this time, since the pressure of the first fuel oil is not such that the pressure of the first fuel oil needle is opened, the injection of the first fuel oil is not performed. However, the pressure lowers the second fuel oil pressurized piston to pressurize the second fuel oil, and the second fuel oil needle rises to inject the second fuel oil.

본 발명의 작동 시 압력 및 니들의 움직임에 대한 해석은 도 4 및 도 5 에서 확인될 수 있다. Interpretations of pressure and needle movement during operation of the present invention can be found in FIGS. 4 and 5.

도 4 는 본 발명에 따른 HFO 모드 동작시 압력 및 니들 움직임을 보인 예시도를 도시한 것으로, HFO 모드에서는 제2연료유(MDO) 니들(6)과 제1연료유(HFO) 니들이 함께 열려서 분사가 이루어진다. 게다가 제1연료유(HFO)의 압력이 아직 상승중이며 저압일 때 제2연료유(MDO)의 압력이 상승하게 되므로 제1연료유(HFO) 분사보다 제2연료유(MDO)가 먼저 분사되게 된다. 이는 pre-injection 과 비슷한 효과를 가져올 수 있다.
4 is an exemplary view showing pressure and needle movement during HFO mode operation according to the present invention. In the HFO mode, the second fuel oil (MDO) needle 6 and the first fuel oil (HFO) needle are opened together and injected. Is done. In addition, the pressure of the first fuel oil (HFO) is still rising and the pressure of the second fuel oil (MDO) is increased when the pressure is low, so that the second fuel oil (MDO) is injected before the first fuel oil (HFO) injection. do. This can have a similar effect to pre-injection.

도 5 는 본 발명에 따른 가스 모드 동작시 압력 및 니들 움직임을 보인 예시도를 도시한 것으로, 가스모드에서는 제2연료유(MDO) 니들만 열려서 제2연료유(MDO)만 분사가 이루어진다. 제2연료유(MDO)의 분사압력 및 그 시기는 제2연료유(MDO) 가압피스톤의 상/하측의 면적차를 이용하여 변경이 가능하다.
5 illustrates an exemplary view showing pressure and needle movement in a gas mode operation according to the present invention. In the gas mode, only the second fuel oil (MDO) needle is opened so that only the second fuel oil (MDO) is injected. The injection pressure and the timing of the second fuel oil (MDO) can be changed by using the area difference between the upper and lower sides of the second fuel oil (MDO) pressurized piston.

본 발명은 상술한 특정의 바람직한 실시예에 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 범위내에 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.

(10) : 제1연료유 분사노즐 (12) : 제1연료유 니들
(13) : 제1연료유 포켓 (14) : 제1연료유 니들스프링
(15) : 스핀들 (20) : 제2연료유 분사노즐
(21) : 제2연료유 가압피스톤 (22) : 제2연료유 니들
(23) : 제2연료유 포켓 (24) : 제2연료유 니들스프링
(25) : 가압피스톤 스프링 (26) : 기밀대
(30) : 분사밸브몸체 (31) : 가압피스톤홀
(40) : 노즐 (41) : 제2연료 공급홀(10): first fuel oil injection nozzle (12): first fuel oil needle
(13): primary fuel oil pocket (14): primary fuel oil needle spring
(15): Spindle 20: Second fuel oil injection nozzle
(21): second fuel oil pressurized piston (22): second fuel oil needle
(23): Second fuel oil pocket (24): Second fuel oil needle spring
25: pressure piston spring 26: airtight
(30): injection valve body (31): pressurized piston hole
40: nozzle 41: second fuel supply hole

Claims (4)

제1연료유 분사노즐부를 통해 제1연료유가 분사되고, 제2연료유 분사노즐부를 통헤 제2연료유가 분사되는 마이크로 파일럿(micro pilot) 타입의 듀얼 퓨얼(dual fuel) 엔진용 연료분사밸브에 있어서;
연료분사펌프에 의해 가압된 제1연료유가 제2연료 분사노즐부의 제2연료유 가압피스톤을 가압한 후, 제1연료유 분사노즐부의 제1연료 포켓으로 공급되고,
제1연료유의 가압에 의한 제2연료유 가압피스톤의 작동에 의해 제2연료유가 제2연료 니들을 통해 제2연료 포켓으로 이동되어 제2연료 니들을 상승시킴으로써 제2연료유가 분사되며,
제1연료유 분사노즐부의 제1연료 포켓으로 공급된 제1연료의 압력정도에 따라 제1연료유가 제1연료유 니들을 상승시켜 제1연료유가 분사되도록 구성된 것을 특징으로 하는 듀얼 퓨얼 연료분사밸브.
In a fuel injection valve of a micro pilot type dual fuel engine, in which a first fuel oil is injected through a first fuel oil injection nozzle part and a second fuel oil is injected through a second fuel oil injection nozzle part. ;
The first fuel oil pressurized by the fuel injection pump pressurizes the second fuel oil pressurized piston of the second fuel injection nozzle part, and then is supplied to the first fuel pocket of the first fuel oil injection nozzle part,
By operating the second fuel oil pressurized piston by pressurization of the first fuel oil, the second fuel oil is moved to the second fuel pocket through the second fuel needle and the second fuel needle is injected by raising the second fuel needle,
The dual fuel fuel injection valve, characterized in that the first fuel oil is raised to the first fuel oil needle to inject the first fuel oil in accordance with the pressure of the first fuel supplied to the first fuel pocket of the first fuel oil injection nozzle portion .
청구항 1 에 있어서;
상기 제2연료유 분사노즐부는 상부로 공급되는 제1연료유에 의해 작동되는 제2연료유 가압피스톤과, 상기 제2연료유 가압피스톤 하부에 위치하고 분사밸브몸체에 설치된 노즐내에 위치하는 제2연료유 니들과, 상기 제2연료유 니들 상측에 위치하는 제2연료유 니들스프링과, 상기 제2연료유 가압피스톤이 관통되어 설치되는 가압피스톤 스프링과, 상기 가압피스톤 스프링과 니들 스프링 사이에 위치하도록 분사밸브몸체와 노즐 사이에 설치되는 기밀대와, 제2연료유 니들을 통해 제2연료유가 공급되는 제2연료유 포켓을 포함하고,
상기 제1연료유 분사노즐부는 분사밸브몸체내에 설치되는 제1연료유 니들스프링과, 상기 제1연료유 니들스프링 하단에 위치하는 스핀들과, 상기 스핀들 하단에 위치하고 분사밸브몸체에 연결된 노즐내에 설치되는 제1연료유 니들과, 상기 제1연료유 니들이 위치한 노즐내에 설치되고 제2연료유 가압피스톤 상부로 공급된 제1연료유가 공급되는 제1연료유 포켓을 포함하는 것을 특징으로 하는 듀얼 퓨얼 연료분사밸브.
The method of claim 1,
The second fuel oil injection nozzle part includes a second fuel oil pressurized piston operated by the first fuel oil supplied to the upper part, and a second fuel oil located under the second fuel oil pressurized piston and positioned in a nozzle installed in the injection valve body. A needle, a second fuel oil needle spring positioned above the second fuel oil needle, a pressurized piston spring installed through the second fuel oil pressurized piston, and sprayed to be positioned between the pressurized piston spring and the needle spring An airtight belt installed between the valve body and the nozzle, and a second fuel oil pocket supplied with the second fuel oil through the second fuel oil needle,
The first fuel oil injection nozzle unit is installed in the first fuel oil needle spring installed in the injection valve body, the spindle located at the lower end of the first fuel oil needle spring, and the nozzle located at the lower end of the spindle and connected to the injection valve body. Dual fuel fuel injection comprising a first fuel oil needle and a first fuel oil pocket is installed in the nozzle in which the first fuel oil needle is located, the first fuel oil pocket supplied with the first fuel oil supplied to the second fuel oil pressure piston. valve.
청구항 1 또는 청구항 2 에 있어서;
상기 제2연료유 가압피스톤은 분사밸브몸체내에 형성된 가압피스톤홀내에 상측이 위치하고 하측이 노즐내에 설치되는 제2연료유 니들내로 삽입되도록 설치되며, 상기 가압피스톤홀내에 위치하는 상측의 단면적이 제2연료유 니들내로 삽입되는 하측의 단면적보다 크도록 형성된 것을 특징으로 하는 듀얼 퓨얼 연료분사밸브.
The method according to claim 1 or 2;
The second fuel oil pressurized piston is installed so that the upper side is positioned in the pressurized piston hole formed in the injection valve body and the lower side is inserted into the second fuel oil needle installed in the nozzle, and the cross section of the upper side located in the pressurized piston hole is second. Dual fuel fuel injection valve, characterized in that formed larger than the cross-sectional area of the lower side inserted into the fuel oil needle.
청구항 1 또는 청구항 2 에 있어서;
상기 제2연료유 니들은 상부 중앙에 제2연료유 가압피스톤이 삽입되는 중앙홀과, 상기 중앙홀과 연통되고 중앙홀내로 제2연료유를 공급하는 다수개의 제1공급유로와, 상기 중앙홀과 일측이 연통되고 타측이 제2연료유 포켓과 연통되는 다수개의 제2공급유로를 포함하는 것을 특징으로 하는 듀얼 퓨얼 연료분사밸브.The method according to claim 1 or 2;
The second fuel oil needle includes a central hole into which a second fuel oil pressurized piston is inserted into an upper center, a plurality of first supply passages communicating with the central hole and supplying a second fuel oil into the central hole, and the central hole. And a plurality of second supply passages communicating with one side and the other side communicating with the second fuel oil pocket.
KR1020100077292A 2010-08-11 2010-08-11 Dual fuel injection valve KR101129887B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020100077292A KR101129887B1 (en) 2010-08-11 2010-08-11 Dual fuel injection valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020100077292A KR101129887B1 (en) 2010-08-11 2010-08-11 Dual fuel injection valve

Publications (2)

Publication Number Publication Date
KR20120015062A KR20120015062A (en) 2012-02-21
KR101129887B1 true KR101129887B1 (en) 2012-03-28

Family

ID=45837915

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020100077292A KR101129887B1 (en) 2010-08-11 2010-08-11 Dual fuel injection valve

Country Status (1)

Country Link
KR (1) KR101129887B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11266344B2 (en) 2016-09-21 2022-03-08 Samsung Electronics Co., Ltd. Method for measuring skin condition and electronic device therefor

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9157384B2 (en) 2013-01-15 2015-10-13 Caterpillar Inc. In-cylinder dynamic gas blending fuel injector and dual fuel engine
CN104696083B (en) * 2015-02-26 2017-05-31 胡松平 Double-fuel guide rail multiple-way valve

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2578423B2 (en) * 1986-03-14 1997-02-05 ソシエテ・デテユ−ド・ドウ・マシ−ヌ・テルミツク・エス．ウ．エム．テ−． Injection device for internal combustion engine capable of injecting two types of fuel
KR0180545B1 (en) * 1990-04-02 1999-03-20 게너묄러 Fuel system for double engine fuel diesel engine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2578423B2 (en) * 1986-03-14 1997-02-05 ソシエテ・デテユ−ド・ドウ・マシ−ヌ・テルミツク・エス．ウ．エム．テ−． Injection device for internal combustion engine capable of injecting two types of fuel
KR0180545B1 (en) * 1990-04-02 1999-03-20 게너묄러 Fuel system for double engine fuel diesel engine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11266344B2 (en) 2016-09-21 2022-03-08 Samsung Electronics Co., Ltd. Method for measuring skin condition and electronic device therefor

Also Published As

Publication number Publication date
KR20120015062A (en) 2012-02-21

Similar Documents

Publication Publication Date Title
US8459576B2 (en) Dual fuel injector for a common rail system
US9664122B2 (en) In-cylinder dynamic gas blending fuel injector and dual fuel engine
US20130319373A1 (en) Dual Fuel Injector And Fuel System
KR101911502B1 (en) High Pressure Pump for Complex Injection Engine
US8910882B2 (en) Fuel injector having reduced armature cavity pressure
JP5580939B2 (en) Fuel injection valve for internal combustion engine
US20100065020A1 (en) Fuel injector
KR101129887B1 (en) Dual fuel injection valve
US6959699B2 (en) Injection of fuel vapor and air mixture into an engine cylinder
JPH0654106B2 (en) Engine fuel injector
US4917068A (en) Unit injector for an engine
KR20120009317A (en) Dual fuel injection valve
CN202914216U (en) Fuel injection pump with separated plungers
US7578283B1 (en) System for selectively increasing fuel pressure in a fuel injection system
JPH07174056A (en) Double fuel injection valve
KR101440174B1 (en) Multi Fuel Inection Apparatus of Diesel Engine
KR101333795B1 (en) Fuel Injector
KR101331140B1 (en) Fuel Injector
CN102628416A (en) Pressure recovery system for low leakage cam assisted common rail fuel system, fuel injector, and operating method therefor
JPH04183968A (en) Fuel injection pump
KR101330693B1 (en) Injector for direct injection type diesel engine
CN104806403B (en) Multi-mode piezoelectric normally closed electronic control unit pump
KR20110049933A (en) A two stage fuel injection valve for a diesel engine
CN117231401A (en) Dual-fuel injector adopting direct injection in high-pressure cylinder
KR101103437B1 (en) Quarter Pressure Plunger and Fuel Injection Pump for Diesel Engine With The Same

Legal Events

Date Code Title Description
A201 Request for examination
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20150223

Year of fee payment: 4

FPAY Annual fee payment

Payment date: 20160224

Year of fee payment: 5

LAPS Lapse due to unpaid annual fee