KR101638815B1 - Injection valve for 4 stroke engine - Google Patents

Injection valve for 4 stroke engine Download PDF

Info

Publication number
KR101638815B1
KR101638815B1 KR1020160002250A KR20160002250A KR101638815B1 KR 101638815 B1 KR101638815 B1 KR 101638815B1 KR 1020160002250 A KR1020160002250 A KR 1020160002250A KR 20160002250 A KR20160002250 A KR 20160002250A KR 101638815 B1 KR101638815 B1 KR 101638815B1
Authority
KR
South Korea
Prior art keywords
fuel
diameter
opening
closing
stepping
Prior art date
Application number
KR1020160002250A
Other languages
Korean (ko)
Inventor
이수철
이성은
Original Assignee
한빛정공(주)
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 한빛정공(주) filed Critical 한빛정공(주)
Priority to KR1020160002250A priority Critical patent/KR101638815B1/en
Application granted granted Critical
Publication of KR101638815B1 publication Critical patent/KR101638815B1/en
Priority to CN201710003580.3A priority patent/CN106762304B/en
Priority to DE102017200105.4A priority patent/DE102017200105A1/en
Priority to JP2017000789A priority patent/JP6471373B2/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
    • 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
    • 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
    • F02M61/06—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 the valves being furnished at seated ends with pintle or plug shaped extensions
    • 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
    • F02M61/042—The valves being provided with fuel passages
    • 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
    • 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
    • F02M61/12—Other injectors with elongated valve bodies, i.e. of needle-valve type characterised by the provision of guiding or centring means for valve bodies
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
    • F02M61/1813—Discharge orifices having different orientations with respect to valve member direction of movement, e.g. orientations being such that fuel jets emerging from discharge orifices collide with each other
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
    • F02M61/182—Discharge orifices being situated in different transversal planes with respect to valve member direction of movement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/1886—Details of valve seats not covered by groups F02M61/1866 - F02M61/188
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0001—Fuel-injection apparatus with specially arranged lubricating system, e.g. by fuel oil
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/0033—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059
    • F02M63/0078—Valve member details, e.g. special shape, hollow or fuel passages in the valve member

Abstract

The present invention relates to a four-stroke injection valve. The present invention includes: a stepping holder including a base slide hole having a first diameter, a first fuel chamber having a second diameter bigger than the first diameter, a first opening surface tapered while getting further away from the fuel chamber, a second fuel chamber having a third diameter smaller than the first and second diameters, a second opening surface having a fourth diameter smaller than the third diameter, a third fuel chamber having a fifth diameter bigger than the fourth diameter but smaller than the third diameter, and a spray hole formed in a radial shape to spray fuel from the second opening surface to the outside; and a stepping rod including a base part reciprocating while sliding with the base slide hole, a first opening part opening and closing the first opening surface while reciprocating with the base part, a fuel inflow part having the fifth diameter smaller than the third and fourth diameters, a second opening part sliding with the second opening surface, an axial hole formed in depth from an end part of the second opening surface to the fuel inflow part, and a fuel inflow hole formed in the fuel inflow part to be connected to the axial hole.

Description

4 행정용 인젝션 밸브{INJECTION VALVE FOR 4 STROKE ENGINE}4-stroke injection valve {INJECTION VALVE FOR 4 STROKE ENGINE}

본 발명은 4 행정용 연료 분사를 위한 인젝션 밸브에 관한 것이다. The present invention relates to an injection valve for fuel injection for four strokes.

디젤 엔진은 크게 2행정 엔진과 4행정 엔진으로 구분되며, 2행정 엔진은 흡입, 압축, 연소, 배기의 싸이클이 피스톤의 2회 왕복으로 완료되며, 4행정 엔진은 흡입, 압축, 연소, 배기의 싸이클이 피스톤의 4회 왕복으로 완료된다. 2행정 엔진은 흡기와 배기를 위한 밸브 구동계가 없어 실린더 헤드가 단순하고, 연소실에는 점화 플러그만 있어 연소 효율이 좋으나, 구조상 4행정만큼 압축비를 높이기 힘들기 때문에 열효율과 연비는 떨어진다. 4행정 엔진은 흡기 밸브와 배기 밸브가 각각 있어서, 흡입 행정에서 흡기 밸브가 열리고 배기 행정에서 배기 밸브가 열려 혼합공기와 연소 가스를 흡기, 배기한다 4행정 엔진은 피스톤이 고속으로 왕복운동하기 때문에 2행정보다 다소 힘은 딸리나 고속 운행이 가능하기 때문에 소형의 쾌속정 등에 사용된다. A diesel engine is roughly classified into a two-stroke engine and a four-stroke engine. The two stroke engine is completed by two reciprocations of the piston for suction, compression, combustion, and exhaust. The cycle is completed with four reciprocations of the piston. The two-stroke engine has a simple cylinder head because there is no valve drive system for intake and exhaust, and the combustion efficiency is good because only the spark plug is installed in the combustion chamber. However, it is difficult to increase the compression ratio by four strokes in structure. The four-stroke engine has an intake valve and an exhaust valve, respectively, so that the intake valve is opened in the intake stroke and the exhaust valve is opened in the exhaust stroke to intake and exhaust the mixed air and combustion gas. Since the piston is reciprocating at high speed It can be used at small speedboat because it is possible to operate at high speed.

도 1은 종래 기술에 따른 2행정 엔진이 구비하는 연료 분사용 노즐을 도시한 도면이다. 공개특허공보 제10-2012-0074327호에 개시된 노즐로, 상기 노즐은 밸브 하우징(2)의 단부에서 중심 홀을 통하여 돌출되는데, 그 환상형태의 표면(3)은 파선으로 표시된 실린더 커버 또는 실린더 라이더 내의 대응하는 접촉표면에 대하여 가압되어서, 노즐 보어(4)를 구비한 노즐의 팁은 연소실(A)로 돌출되며 연료 밸브가 개방시에 연료를 분사할 수 있게 된다. 상기 연료 밸브는 슬라이더 가이드(8)의 저단부에서 도시된 밸브 디자인으로 위치된 밸브 시트(7) 및 밸브 니들(6)을 구비한 밸브슬라이더(5)를 구비한다. 상기 슬라이더 가이드는 노즐(1)상에서 상측 대향 표면에 대하여 아래로 가압된다. 1 is a view showing a fuel injection nozzle provided in a two-stroke engine according to the prior art. In the nozzle disclosed in Patent Publication No. 10-2012-0074327, the nozzle protrudes through the center hole at the end of the valve housing 2, and its annular surface 3 is covered with a cylinder cover or a cylinder rider So that the tip of the nozzle with the nozzle bore 4 protrudes into the combustion chamber A and the fuel valve is able to inject fuel upon opening. The fuel valve has a valve slider 5 with a valve seat 7 and a valve needle 6 positioned in the valve design shown at the lower end of the slider guide 8. The slider guide is pressed downward against the upper opposing surface on the nozzle 1. [

도 2는 종래 기술에 따른 4행정 엔진이 구비하는 연료 분사용 노즐을 도시한 도면이다. 대한민국 공개특허공보 제10-2010-0002127호에 도시된 노즐로, 본 예의 디젤 엔진용 연료분사장치는, 연료가 공급되는 노즐 본체(21; 노즐보디)와, 그 내부에서 이동 가능하게 이루어진 니들밸브(22)를 가지고 있다. FIG. 2 is a view showing a fuel injection nozzle included in the conventional four-stroke engine. The fuel injection device for a diesel engine of this embodiment is a nozzle shown in Korean Patent Laid-Open No. 10-2010-0002127, which includes a nozzle body 21 (nozzle body) to which fuel is supplied, a needle valve (22).

노즐 본체(21)는 끝이 가는 대략 원통형의 블록체이며, 그 기저단부의 중심에는 니들밸브(22)의 안내구멍(23)이 형성되어 있다. 상기 안내구멍(23)의 앞쪽은 직경이 확대된 연료축적부(24)로 되어 있어, 외부로부터 연료공급구멍(25)을 통해 상기 연료축적부(24) 내에 연료가 공급되도록 되어 있다. 또한 연료축적부(24)의 선단에는 테이퍼형상의 시트부(26)가 형성되어 있다. 상기 시트부(26)의 더 앞쪽에는, 연료축적부(24)와 연결되어 통하는 직경이 작은 구멍(27)이 형성되어 있고, 상기 구멍(27)의 벽부에는 외부와 연결되어 통하도록 형성된 노즐구멍(28)이 형성되어 있다. The nozzle body 21 is a substantially cylindrical block body having an end, and a guide hole 23 of the needle valve 22 is formed at the center of the base end thereof. The front side of the guide hole 23 is a fuel accumulating portion 24 whose diameter is enlarged so that the fuel is supplied into the fuel accumulating portion 24 from the outside through the fuel supplying hole 25. [ Further, a tapered seat portion 26 is formed at the tip of the fuel accumulation portion 24. [ A hole 27 having a small diameter communicating with the fuel accumulating portion 24 is formed further ahead of the seat portion 26. The wall portion of the hole 27 is provided with a nozzle hole (28) are formed.

니들밸브(22)는, 노즐 본체(21)의 안내구멍(23)에 슬라이딩 가능하게 유지된 환봉(丸棒)형상의 베이스부(30; 니들 직경φD)와, 연료축적부(24)의 내경보다 직경이 작고 베이스부(30)와 일체로 형성되어, 그 선단에는 노즐 본체(21)의 시트부(26)와 접촉하는 테이퍼형상의 시트부(31)가 형성된 환봉형상의 선단부(32; 시트 직경 φd <φD)를 가지고 있다. The needle valve 22 includes a base portion 30 (needle diameter? D) in the form of a round bar that is slidably held in the guide hole 23 of the nozzle body 21, Shaped tip end portion 32 (seat 32) having a smaller diameter and formed integrally with the base portion 30 and having a tapered seat portion 31 which is in contact with the seat portion 26 of the nozzle body 21, Diameter? D <? D).

니들밸브(22)는, 그 시트부(31)가, 노즐 본체(21)의 시트부(26)와 맞닿는 방향으로 스프링 등의 가압수단에 의해 하중(W)으로 가압되어 있고, 외력을 받지 않은 상태에서는, 니들밸브(22)의 시트부(31)는 노즐 본체(21)의 시트부(26)에 접촉하여 시트부(26, 31) 사이를 폐쇄하고 있어, 연료축적부(24)와 노즐구멍(28)의 사이는 차단되어 있다. The needle valve 22 is urged by a pressing force such as a spring in the direction in which the seat portion 31 is in contact with the seat portion 26 of the nozzle body 21 by a load W, The seat portion 31 of the needle valve 22 is in contact with the seat portion 26 of the nozzle body 21 to close the space between the seat portions 26 and 31, The space between the holes 28 is blocked.

연료분사 시에는 연료공급구멍(25)으로부터 소정 압력의 연료가 연료축적부(24) 내에 공급되어, 내압의 상승에 의해 니들밸브(22)가 힘을 받아 안내구멍(23)으로 안내되어 상방으로 이동하고, 시트부(26, 31) 사이가 개방되어 노즐구멍(28)으로부터 외부로 연료가 분사된다.Fuel at a predetermined pressure is supplied from the fuel supply hole 25 into the fuel accumulation portion 24 so that the needle valve 22 is urged by the rise of the internal pressure and is guided to the guide hole 23, And between the seat portions 26 and 31, the fuel is injected from the nozzle hole 28 to the outside.

종래의 연료 분사 장치들은 연료분사 노즐 끝단에는 복수 분무홀 가공 및 유량계수 증대를 위한 자루모양의 작은 체적부가 있는데 이를 노즐 색(sac)이라 하며 분사 후에 sac volume(섹 체적)에 해당하는 잔류 연료 오일이 후분사 연소를 일으킴으로써, 그을음, 미연소 HC와 같은 연소실 내 퇴적물이 지속적으로 발생된다. Conventional fuel injection devices have a small volume of a bag shape for the purpose of multiplying spray holes and increasing the number of flow meters at the end of the fuel injection nozzle. This is called a nozzle color (sac) and is a residual fuel oil Subsequently, by causing injection combustion, sediments such as soot and unburned HC are continuously generated in the combustion chamber.

sac volume을 줄이면 연료분사 종료 후 후적이 감소하여 탄화수소가 감소하지만 분무 특성과 분무홀 간의 편차가 커지는 문제가 있다. When the sheet volume is reduced, there is a problem in that the amount of hydrocarbons decreases after the end of the fuel injection, but the deviation between the spray characteristics and the spray holes increases.

공개특허공보 제10-2012-0074327호Published patent application No. 10-2012-0074327 공개특허공보 제10-2012-0074327호Published patent application No. 10-2012-0074327

본 발명은 미분사된 연료가 제1 연료실 및 연료 공급 유로로 역류하는 것을 신뢰성 있게 차단할 수 있는 4 행정용 인젝션 밸브를 제공하는 것을 목적으로 한다. An object of the present invention is to provide a four-stroke injection valve capable of reliably blocking reverse flow of finely divided fuel into the first fuel chamber and the fuel supply passage.

또한 sac volume을 감소시키는 동시에 안정적으로 연료를 분사홀로 분사할 수 있는 4 행정용 인젝션 밸브를 제공하는 것을 목적으로 한다. Another object of the present invention is to provide a four-stroke injection valve capable of stably injecting fuel into the injection hole while reducing the volume of the sac.

본 발명은 제1 지름을 가지는 베이스 슬라이드홀, 제1 지름보다 큰 제2 지름을 가지는 제1 연료실, 연료실로부터 멀어질수록 지름이 작아지는 테이퍼 형상의 제1 개폐면, 제1 및 제2 지름보다 작은 제3 지름을 가지는 제2 연료실, 제3 지름보다 작은 제4 지름을 가지는 제2 개폐면, 제4 지름보다 크고 제3 지름보다 작은 제5 지름을 가지는 제3 연료실 및 제2 개폐면로부터 외부로 연료를 분사할 수 있도록 방사상으로 형성되는 분사홀을 구비하는 스텝핑 홀더 및 베이스 슬라이드홀과 습동하며 왕복운동하는 베이스부, 베이스부와 왕복운동하며 제1 개폐부를 개폐하는 제1 개폐부, 제3 지름 및 제4 지름보다 작은 제5 지름을 가지는 연료 유입부, 제2 개폐면와 습동하는 제2 개폐부, 제2 개폐면의 단부로부터 연료 유입부의 소정 깊이까지 형성되는 축공 및 축공과 연통하도록 연료 유입부에 형성되는 연료 유입홀을 구비하는 스텝핑 로드를 포함하는 것을 특징으로 하는 4 행정용 인젝션 밸브를 제공한다. The present invention relates to a fuel cell system comprising a base slide hole having a first diameter, a first fuel chamber having a second diameter larger than the first diameter, a first opening and closing surface of a tapered shape having a smaller diameter as the fuel chamber moves away from the fuel chamber, A second fuel chamber having a third diameter smaller than the third diameter, a second opening face having a fourth diameter smaller than the third diameter, a third fuel chamber having a fifth diameter larger than the fourth diameter and smaller than the third diameter, A stepping holder having a spray hole formed radially so as to inject fuel from the opening and closing face to the outside, a base portion slidingly reciprocating with the base slide hole, a first opening and closing portion opening and closing the first opening and closing portion, A fuel inlet portion having a third diameter and a fourth diameter smaller than the fourth diameter, a second opening and closing portion sliding on the second opening and closing face, a shaft hole and a shaft hole formed to a predetermined depth of the fuel inlet portion from the end of the second opening and closing face, To communicate and provides a four-stroke injection valve comprises a stepping rod having a fuel inlet hole formed in the fuel inlet portion.

또한 본 발명의 다른 일 예로, 스텝핑 홀더는, 제1 연료실로 연료를 공급하는 연료 유입 유로를 더 구비하는 것을 특징으로 하는 4 행정용 인젝션 밸브를 제공한다. In another embodiment of the present invention, the stepping holder further includes a fuel inflow passage for supplying fuel to the first fuel chamber.

또한 본 발명의 다른 일 예로, 스텝핑 로드는 제2 개폐부에 윤활홈을 추가로 구비하는 것을 특징으로 하는 4 행정용 인젝션 밸브를 제공한다. According to another embodiment of the present invention, the stepping rod further includes a lubricant groove in the second opening and closing part.

또한 본 발명의 다른 일 예로, 윤활홈은 왕복 운동 시 스텝핑 홀더의 분사홀 및 제2 연료실과 만나지 않는 위치에 형성되는 것을 특징으로 하는 4 행정용 인젝션 밸브를 제공한다. According to another aspect of the present invention, there is provided a four-stroke injection valve characterized in that the lubricant groove is formed at a position not meeting the injection hole of the stepping holder and the second fuel chamber in the reciprocating motion.

본 발명이 제공하는 4행정용 인젝션 밸브는 미분사된 연료가 분사홀 주위에서 한 번, 제1 연료실 주위에서 한 번 이중으로 차단되어 제1 연료실 및 연료 공급 유로로 역류하는 것을 신뢰성 있게 차단할 수 있다.The four-stroke injection valve provided by the present invention reliably blocks the backflow of the finely divided fuel once around the injection hole and once around the first fuel chamber to the first fuel chamber and the fuel supply passage .

또한 본 발명이 제공하는 4행정용 인젝션 밸브는 연료실과 분사홀 사이가 이중으로 차단됨으로써 슬러지를 방지할 수 있어 스텝핑 홀더와 스텝핑 로드의 내마모성을 향상시킬 수 있다.Further, the four-stroke injection valve provided by the present invention can prevent sludge by double-blocking between the fuel chamber and the injection hole, thereby improving the wear resistance of the stepping holder and the stepping rod.

또한 본 발명이 제공하는 4행정용 인젝션 밸브는 역류 가스의 유입을 방지함으로써, 스텝핑 로드와 스텝핑 홀더의 탈탄을 방지할 수 있으며, 그에 따라 습동면의 수명을 연장시킬 수 있다. Further, the four-stroke injection valve provided by the present invention can prevent decoupling of the stepping rod and the stepping holder by preventing the inflow of the backflow gas, thereby prolonging the life of the sliding surface.

또한, 후분사 연소의 원인인 sac volume을 줄일 수 있어, NOx, CO, smoke, 미연소 HC및 연소실내 퇴적물을 줄여 실린더의 작동 조건을 개선시키는 효과가 있다. Also, it is possible to reduce the volume of the sac which is the cause of the post-injection combustion, thereby reducing NOx, CO, smoke, unburned HC, and combustion chamber deposits, thereby improving the operating condition of the cylinder.

또한 스텝핑 홀더와 스텝핑 로드 사이에 윤활홈을 구비함으로써 마찰열의 발생을 줄여, 스텝핑 홀더와 스텝핑 로드 사이의 공차를 타이트하게 함으로써 연료 가수의 역류를 방지할 수 있다. Further, by providing a lubricating groove between the stepping holder and the stepping rod, generation of frictional heat is reduced, and the tolerance between the stepping holder and the stepping rod is made tight, thereby preventing backflow of the fuel gas.

도 1은 종래 기술에 따른 2행정 엔진이 구비하는 연료 분사용 노즐을 도시한 도면,
도 2는 종래 기술에 따른 4행정 엔진이 구비하는 연료 분사용 노즐을 도시한 도면,
도 3은 본 발명의 제1 실시예에 따른 4 행정용 인젝션 밸브의 스텝핑 홀더를 도시한 도면,
도 4은 본 발명의 제1 실시예에 따른 4 행정용 인젝션 밸브의 스텝핑 로드를 도시한 도면,
도 5는 본 발명의 제1 실시예에 따른 4행정 인젝션 밸브가 차단된 모습을 도시한 도면,
도 6은 본 발명의 제1 실시예에 따른 4행정 인젝션 밸브가 개방된 모습을 도시한 도면,
도 7은 본 발명의 제2 실시예에 따른 4 행정용 인젝션 밸브의 스텝핑 로드를 도시한 도면.1 is a view showing a fuel injection nozzle provided in a two-stroke engine according to the prior art,
2 is a view showing a fuel injection nozzle provided in a four-stroke engine according to the prior art,
3 is a view showing a stepping holder of a four-stroke injection valve according to the first embodiment of the present invention,
4 is a view showing a stepping rod of a four-stroke injection valve according to the first embodiment of the present invention,
5 is a view showing a state in which the 4-stroke injection valve according to the first embodiment of the present invention is shut off,
6 is a view showing a state in which the four-stroke injection valve according to the first embodiment of the present invention is opened,
FIG. 7 is a view showing a stepping rod of a four-stroke injection valve according to a second embodiment of the present invention; FIG.

이하 도면을 참조하여 본 발명을 더욱 상세하게 설명한다. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the drawings.

도 3은 본 발명의 제1 실시예에 따른 4 행정용 인젝션 밸브의 스텝핑 홀더를 도시한 도면이다. 3 is a view showing a stepping holder of a four-stroke injection valve according to the first embodiment of the present invention.

본 발명에 따른 인젝션 밸브는, 축 방향으로 후술할 스텝핑 로드(200; 도 4 참조)를 수용하기 위한 슬라이드공이 형성되는 스텝핑 홀더(100)와, 슬라이드공 내에 삽입되어 슬라이드 하며 연료의 분사를 제어하는 스텝핑 로드(200; 도 4 참조)를 포함한다. The injection valve according to the present invention includes a stepping holder 100 having a slide hole for accommodating a stepping rod 200 (see FIG. 4) to be described later in the axial direction, And a stepping load 200 (see FIG. 4).

스텝핑 홀더(100)에 형성되는 슬라이드공은 상부로부터 순서대로 제1 지름을 가지는 베이스 슬라이드홀(110), 제1 지름보다 큰 제2 지름을 가지는 제1 연료실(120), 제1 연료실(120)로부터 멀어질수록 지름이 작아지는 테이퍼 형상의 제1 개폐면(140), 제1 및 제2 지름보다 작은 제3 지름을 가지는 제2 연료실(150), 제3 지름보다 작은 제4 지름을 가지는 제2 개폐면(160) 및 제4 지름보다 크고 제3 지름보다 작은 제5 지름을 가지는 제3 연료실(170)로 이루어진다. 여기서 상부란 도면상에서 상부에 도시된 곳을 의미한다. 또한, 연료를 유입하는 연료 유입 유로(130)가 제1 연료실(120)과 연통되도록 비스듬하게 형성된다. 또한, 스텝핑 홀더(100)는 외부로 연료를 분사할 수 있도록 제2 개폐면(160)에 방사상으로 형성되는 분사홀(180)을 더 구비한다. The slide hole formed in the stepping holder 100 includes a base slide hole 110 having a first diameter, a first fuel chamber 120 having a second diameter larger than the first diameter, A second fuel chamber 150 having a third diameter smaller than the first diameter and the second diameter, a fourth diameter smaller than the third diameter, And a third fuel chamber (170) having a fifth diameter which is larger than the fourth diameter and smaller than the third diameter. The term &quot; upper portion &quot; Further, the fuel inflow passage 130 through which fuel flows is formed obliquely so as to communicate with the first fuel chamber 120. The stepping holder 100 further includes a spray hole 180 radially formed on the second opening / closing surface 160 so as to inject fuel to the outside.

도 4는 본 발명의 제1 실시예에 따른 4 행정용 인젝션 밸브의 스텝핑 로드를 도시한 도면이다. 4 is a view showing a stepping rod of a four-stroke injection valve according to the first embodiment of the present invention.

스텝핑 로드(200)는 베이스 슬라이드홀(110; 도 3 참조)과 습동하며 왕복운동하는 베이스부(210), 제1 개폐면(140; 도 3 참조)를 개폐하는 제1 개폐부(240), 제3 지름 및 제4 지름보다 작은 제5 지름을 가지는 연료 유입부(250), 제2 개폐면와 습동하는 제2 개폐부(260), 제2 개폐면의 단부로부터 연료 유입부의 소정 깊이까지 형성되는 축공(270) 및 축공(270)과 연통하도록 연료 유입부(250)에 형성되는 연료 유입홀(280)을 상부로부터 순차로 구비한다.The stepping rod 200 includes a base portion 210 sliding and reciprocating with the base slide hole 110 (see FIG. 3), a first opening and closing portion 240 for opening and closing the first opening and closing surface 140 (see FIG. 3) A fuel inlet 250 having a third diameter and a fourth diameter smaller than the fourth diameter, a second opening / closing part 260 sliding on the second opening / closing surface, a shaft opening / closing part 260 extending from the end of the second opening / And a fuel inflow hole 280 formed in the fuel inflow portion 250 to communicate with the shaft hole 270 in this order from the top.

제1 개폐부(240)는 제1 개폐면(140)을 개폐하기 위해, 제1 개폐면(140)과 대응하는 테이퍼 형상으로 형성된다. 제1 개폐부(240)와 제1 개폐면(140)이 밀착하여 폐쇄됐을 때, 연료가 일시적으로 저장되는 제1 연료실(120)의 공간을 충분히 확보할 수 있도록, 제1 개폐부(240)의 축방향 길이는 제1 개폐면(140)의 축방향 길이보다 짧다. 따라서 제1 개폐부(240)의 최대 지름과 같은 지름을 가지는 중간부(230)는, 제1 연료실(120)보다 작은 지름을 가진다. 따라서 중간부(230)와 제1 연료실(120) 사이의 공간이 연료를 일시적으로 저장되는데 이용된다. 이때, 연료 저장 공간을 충분히 마련하기 위해, 중간부(230)와 베이스부(210) 사이에 중간부(230)보다 지름이 작은 소경부(220)가 더 구비될 수도 있다. The first opening and closing part 240 is formed in a tapered shape corresponding to the first opening and closing surface 140 to open and close the first opening and closing surface 140. When the first opening and closing part 240 and the first opening and closing surface 140 are in close contact with each other to close the first opening and closing part 240, The axial length is shorter than the axial length of the first opening and closing surface 140. Therefore, the intermediate portion 230 having a diameter equal to the maximum diameter of the first opening and closing portion 240 has a diameter smaller than that of the first fuel chamber 120. Therefore, a space between the intermediate portion 230 and the first fuel chamber 120 is used to temporarily store the fuel. At this time, a small diameter portion 220 having a smaller diameter than the intermediate portion 230 may be further provided between the intermediate portion 230 and the base portion 210 to sufficiently provide the fuel storage space.

제1 개폐부(240)의 하부에는 제1 개폐부(240)의 가장 작은 지름보다 더 지름이 작은 연료 유입부(250)가 형성된다. 연료 유입부(250)는 제2 연료실(150) 및 제2 개폐면(160)보다 더 작은 지름을 가진다. 연료 유입부(250)의 하부에는 제2 개폐면(160)과 습동하는 제2 개폐부(260)가 형성된다. A fuel inflow portion 250 having a smaller diameter than the smallest diameter of the first opening and closing portion 240 is formed in the lower portion of the first opening and closing portion 240. The fuel inlet portion 250 has a smaller diameter than the second fuel chamber 150 and the second opening / closing face 160. A second opening / closing part (160) and a second opening / closing part (260) sliding on the fuel inflow part (250) are formed below the fuel inflow part (250).

스텝핑 로드(200)의 최하단부, 즉, 제2 개폐부(260)의 하단으로부터 연료 유입부(250)의 소정 위치까지 축공(270)이 형성된다. 또한, 축공(270)과 연통하도록, 연료 유입부(250)에 복수 개의 연료 유입홀(280)이 형성된다. The shaft hole 270 is formed from the lowermost end of the stepping rod 200, that is, from the lower end of the second opening / closing part 260 to a predetermined position of the fuel inlet 250. A plurality of fuel inlet holes 280 are formed in the fuel inlet 250 so as to communicate with the shaft hole 270.

도 5는 본 발명의 제1 실시예에 따른 4행정 인젝션 밸브가 차단된 모습을 도시한 도면, 도 6은 본 발명의 제1 실시예에 따른 4행정 인젝션 밸브가 개방된 모습을 도시한 도면이다. 도 3 내지 도 6을 참조하여 본 발명의 제1 실시예에 따른 4행정 인젝션 밸브의 작동을 설명한다. FIG. 5 is a view showing a state in which the 4-stroke injection valve according to the first embodiment of the present invention is cut off, and FIG. 6 is a view showing a state in which the 4-stroke injection valve according to the first embodiment of the present invention is opened . The operation of the four-stroke injection valve according to the first embodiment of the present invention will be described with reference to FIGS. 3 to 6. FIG.

베이스 슬라이드홀(110)은 후술할 스텝핑 로드의 베이스(210)부가 습동하는 부분으로, 스텝핑 로드(200)가 상하로 왕복운동하도록 안내하는 역할을 한다. 스텝핑 로드(200)는 베이스부(210)의 상부에 스프링과 연결되는 연결축(290)을 포함하며, 연결축(290)으로부터 동력을 전달받아 상하로 왕복운동하며 분사홀(180)을 개폐한다. 제1 연료실(120)은 연료 유입 유로(130)를 통해 유입된 연료가 일시적으로 저장되는 곳으로, 제1 연료실(120)에 연료가 축적되어 안정적으로 연료가 분사되도록 한다. 제1 개폐면(140)은 테이퍼 형상으로, 역시 테이퍼 형상인 스텝핑 로드의 제1 개폐부(240)와 접촉과 분리를 반복하며, 제1 연료실(120)과 제2 연료실(150) 사이를 개폐한다. 제2 연료실(150)은 제1 개폐면(140)과 제1 개폐부(240)가 분리되면, 제1 연료실(120)과 연통되어 제1 연료실(120)에 축적된 연료가 유입된다. 연료는 제2 연료실(150)에서 연료 유입홀(280) 및 축공(270)을 통해 제3 연료실(170)로 유동하여, 제3 연료실(170)에도 일시적으로 축적될 수 있다. 제3 연료실(170)은 밸브의 폐쇄 시에 미분사된 연료를 일시적으로 수용할 수 있는 공간이다. The base slide hole 110 serves as a sliding portion of a base 210 of a stepping rod to be described later, and guides the stepping rod 200 to reciprocate upward and downward. The stepping rod 200 includes a connection shaft 290 connected to a spring at an upper portion of the base 210 and receives power from the connection shaft 290 to reciprocate upward and downward to open and close the injection hole 180 . The first fuel chamber 120 is a place where the fuel introduced through the fuel inflow passage 130 is temporarily stored, so that the fuel is accumulated in the first fuel chamber 120 so that the fuel is injected stably. The first opening and closing surface 140 is tapered and contacts and separates from the first opening and closing part 240 of the tapered stepping rod. Open and close. When the first opening and closing surface 140 and the first opening and closing part 240 are separated from each other, the second fuel chamber 150 communicates with the first fuel chamber 120 and the fuel accumulated in the first fuel chamber 120 flows into the second fuel chamber 150 . The fuel flows from the second fuel chamber 150 to the third fuel chamber 170 via the fuel inlet hole 280 and the shaft hole 270 and may be temporarily stored in the third fuel chamber 170. [ The third fuel chamber 170 is a space in which the fuel atomized at the time of closing the valve can be temporarily accommodated.

스텝핑 로드(200)가 하사점에 위치할 때, 제1 개폐면(140)과 제2 개폐면(160)은 모두 폐쇄되며, 분사홀(180)을 통해 연료가 분사되지 않는다. When the stepping rod 200 is positioned at the bottom dead center, both the first opening / closing surface 140 and the second opening / closing surface 160 are closed, and fuel is not injected through the injection hole 180.

제2 개폐면(160)은 연료의 역류를 차단하기 위해 충분한 면적을 가질 수 있도록 충분히 긴 길이로 형성된다. 즉, 도 3에 도시된 바와 같이, 제1 연료실(120), 제1 개폐면(140), 제2 연료실(150)의 길이보다 제2 개폐면(160)의 길이가 더 길다. 또한, 스텝핑 로드(200)의 스트로크 길이보다 충분히 더 긴 것이 바람직하다. 제2 개폐면(160)의 길이와, 제2 개폐부(260)의 길이는 같으며, 제2 개폐면(160)과 제2개폐부(260)의 접촉 면적이 충분하게 확보되어 엔진으로부터 분사홀(180)을 통해 연료가 역류하는 것을 차단할 수 있다. The second opening face 160 is formed to have a sufficiently long length so as to have a sufficient area to block the back flow of the fuel. 3, the length of the second opening and closing face 160 is longer than the length of the first fuel chamber 120, the first opening and closing face 140, and the second fuel chamber 150. [ Further, it is preferable that the stroke length of the stepping rod 200 is sufficiently larger than the stroke length of the stepping rod 200. The length of the second opening and closing part 160 and the length of the second opening and closing part 260 are the same and the contact area between the second opening and closing face 160 and the second opening and closing part 260 is sufficiently secured, 180 to prevent fuel from flowing backward.

또한, 제1 개폐면(140)과 제1 개폐부(160)의 접촉에 의해 제2 연료실(150)로부터 제1 연료실(120)로의 연료의 역류가 차단된다. The back flow of the fuel from the second fuel chamber 150 to the first fuel chamber 120 is blocked by the contact of the first opening and closing surface 140 and the first opening and closing portion 160.

이렇게 이중으로 연료 유입 유로(130)와 분사홀(180)이 이중으로 차단되기 때문에, 연료의 역류를 확실히 차단할 수 있을 뿐만 아니라 연료의 누설을 방지할 수 있다. 또한 연료의 역류가 차단되기 때문에 슬러지를 방지할 수 있어 노즐의 내마모성을 향상시킬 수 있다. 또한 역류 가스에 의한 탈탄을 방지할 수 있어, 습동면의 수명을 연장할 수 있다는 장점이 있다. Since the fuel inflow passage 130 and the injection hole 180 are double-blocked in this manner, the backflow of the fuel can be surely blocked, as well as the leakage of the fuel can be prevented. Further, since the backflow of the fuel is blocked, the sludge can be prevented and the wear resistance of the nozzle can be improved. In addition, it is possible to prevent decarburization due to the back stream gas, thereby extending the service life of the sliding surface.

또한, 후분사 연소의 원인인 sac volume을 줄일 수 있어, NOx, CO, smoke, 미연소 HC및 연소실내 퇴적물을 줄여 실린더의 작동 조건을 개선시키는 효과가 있다. Also, it is possible to reduce the volume of the sac which is the cause of the post-injection combustion, thereby reducing NOx, CO, smoke, unburned HC, and combustion chamber deposits, thereby improving the operating condition of the cylinder.

도 6을 참조하면, 밸브가 개방되었을 때, 연료 유입 유로(130)를 통해 유입된 연료는 제1 연료실(120)을 거쳐, 제1 개폐면(140)과 제1 개폐부(240) 사이의 공간을 통해 제2 연료실(150)로 유입된다. 또한 제2 연료실(150)에서 연료 유입홀(280)과 축공(270)을 거쳐 분사홀(180)을 통해 엔진 내부로 연료가 분사된다. 이때 바람직하게는 축공(270)의 최하단부는, 하부로 갈수록 축공(270)의 지름이 점점 넓어지는 것이 바람직하다. 이러한 형상으로 인해 연료의 유동을 원활히 하여 분사홀(180)을 통한 연료의 분무량을 증가시킬 수 있다. 6, when the valve is opened, the fuel introduced through the fuel inlet flow path 130 flows through the first fuel chamber 120 and flows into the first opening / closing surface 140 and the first opening / And then flows into the second fuel chamber 150 through the space. The fuel is injected into the engine through the injection hole 180 through the fuel inlet hole 280 and the shaft hole 270 in the second fuel chamber 150. At this time, it is preferable that the diameter of the shaft hole 270 gradually increases toward the lower part of the lowermost end of the shaft hole 270. This shape facilitates the flow of fuel and increases the amount of fuel sprayed through the injection holes 180.

도 7은 본 발명의 제2 실시예에 따른 4 행정용 인젝션 밸브의 스텝핑 로드를 도시한 도면이다.7 is a view showing a stepping rod of a four-stroke injection valve according to a second embodiment of the present invention.

본 발명의 제2 실시예에 따른 4 행정용 인젝션 밸브는 스텝핑 로드(200)의 제2 개폐부(260)에 하나 이상의 윤활홈(260a)을 형성한 것을 제외하고는 제1 실시예와 구성 요소 및 동작 원리가 동일하다. 4 행정용 엔진은 고속으로 작동되며, 그에 따라 엔진 내에 연료를 분사하는 노즐의 스텝핑 로드(200) 역시 스텝핑 홀더(100; 도 3 내지 도 6 참조)를 따라 고속으로 왕복운동하게 된다. 그에 따라 스텝핑 로드(200)와 스텝핑 홀더(100)이 과열되게 되며, 거의 모든 4행정용 노즐은 냉각 유로를 갖추고 있다. 본 발명의 제2 실시예에 따른 4 행정용 인젝션 밸브의 스텝핑 로드(200)는 특히 스텝핑 로드(200)와 스텝핑 홀더(100) 사이의 마찰 면적이 큰 제2 개폐면(160)과 제2 개폐부(260)에서의 마찰열을 줄이기 위해, 제2 개폐부(260)에 윤활을 위한 하나 이상의 윤활홈(260a)을 구비한다. 도 7에 도시된 바와 같이 윤활홈(260a)은 제2 개폐부(260)의 외주를 따라 형성된 링 형상으로 형성될 수 있다. 그러나 도 7에 도시된 형상 외에도 딤플 형상이나 스파이럴 형상 등 스텝핑 로드(200)와 스텝핑 홀더(100) 사이의 마찰열을 줄이고 원활한 왕복 운동을 돕는 형상이라면 어떠한 형상이어도 무방하다.Stroke injection valve according to the second embodiment of the present invention is the same as the first embodiment except that at least one lubricating groove 260a is formed in the second opening and closing part 260 of the stepping rod 200, The operation principle is the same. The four stroke engine is operated at a high speed so that the stepping rod 200 of the nozzle for injecting the fuel into the engine also reciprocates at high speed along the stepping holder 100 (see Figs. 3 to 6). As a result, the stepping rod 200 and the stepping holder 100 are overheated, and almost all of the four-stroke nozzles have a cooling flow path. The stepping rod 200 of the four-stroke injection valve according to the second embodiment of the present invention particularly has the second opening / closing face 160 having a large friction area between the stepping rod 200 and the stepping holder 100, (260) is provided with at least one lubrication groove (260a) for lubrication in order to reduce frictional heat at the first opening (260). 7, the lubricant groove 260a may be formed in the shape of a ring formed along the outer periphery of the second opening and closing part 260. As shown in FIG. However, in addition to the shape shown in Fig. 7, any shape may be used as long as it can reduce frictional heat between the stepping rod 200 and the stepping holder 100, such as dimple shape or spiral shape, and help smooth reciprocating motion.

다만, 제2 개폐면(160)과 제2 개폐부(260)는 신뢰성 있게 연료의 역류와 누설을 차단하여야 하므로, 윤활홈(260a)은 스텝핑 로드(200)의 노즐의 폐쇄 시에 스텝핑 홀더(100)의 분사홀(180) 및 제2 연료실(150)과 만나지 않는 위치에 형성되어야 한다. Since the second opening and closing surface 160 and the second opening and closing portion 260 must reliably block the back flow of the fuel and the leakage of the fuel, the lubricating groove 260a is formed between the stepping holder 100 The injection hole 180 and the second fuel chamber 150 of the second fuel chamber 150 are not in contact with each other.

이렇게 스텝핑 로드(200)의 제2 개폐부(260)에 윤활홈(260a)을 형성함으로써, 제2 개폐부(260)와 제2 개폐면(160) 사이에 윤활 및 냉각이 이루어짐으로써, 더 정밀한 공차로 결합될 수 있으며, 그에 따라 제2 개폐부(260)와 제2 개폐면(160)에 의한 역류 방지 기능을 더욱 향상시킬 수 있다. The lubrication groove 260a is formed in the second opening and closing part 260 of the stepping rod 200 so that lubrication and cooling are performed between the second opening and closing part 260 and the second opening and closing face 160, The second opening / closing part 260 and the second opening / closing surface 160 can further improve the backflow prevention function.

Claims (4)

제1 지름을 가지는 베이스 슬라이드홀, 제1 지름보다 큰 제2 지름을 가지는 제1 연료실, 연료실로부터 멀어질수록 지름이 작아지는 테이퍼 형상의 제1 개폐면, 제1 및 제2 지름보다 작은 제3 지름을 가지는 제2 연료실, 제3 지름보다 작은 제4 지름을 가지는 제2 개폐면, 제4 지름보다 크고 제3 지름보다 작은 제5 지름을 가지는 제3 연료실 및 제2 개폐면으로부터 외부로 연료를 분사할 수 있도록 방사상으로 형성되는 분사홀을 구비하는 스텝핑 홀더; 및
베이스 슬라이드홀과 습동하며 왕복운동하는 베이스부, 제1 개폐부를 개폐하는 제1 개폐부, 제3 지름 및 제4 지름보다 작은 제6 지름을 가지는 연료 유입부, 제2 개폐면와 습동하는 제2 개폐부, 제2 개폐면의 단부로부터 연료 유입부의 소정 깊이까지 형성되는 축공 및 축공과 연통하도록 연료 유입부에 형성되는 연료 유입홀을 구비하는 스텝핑 로드;를 포함하는 것을 특징으로 하는 4 행정용 인젝션 밸브. A first fuel chamber having a second diameter larger than the first diameter, a first opening and closing surface having a tapered shape smaller in diameter as it moves away from the fuel chamber, a first opening and closing surface having a smaller diameter than the first and second diameters, A second fuel chamber having a third diameter, a second opening and closing surface having a fourth diameter smaller than the third diameter, a third fuel chamber having a fifth diameter larger than the fourth diameter and smaller than the third diameter, A stepping holder having an injection hole radially formed so as to inject fuel to the outside; And
A first opening and closing part for opening and closing the first opening and closing part, a fuel inflow part having a third diameter and a sixth diameter smaller than the fourth diameter, a second opening and closing part for sliding with the second opening and closing face, And a stepping rod having a shaft hole formed from an end of the second opening face to a predetermined depth of the fuel inlet and a fuel inlet hole formed in the fuel inlet to communicate with the shaft hole. 제1항에 있어서,
스텝핑 홀더는, 제1 연료실로 연료를 공급하는 연료 유입 유로를 더 구비하는 것을 특징으로 하는 4 행정용 인젝션 밸브.The method according to claim 1,
Wherein the stepping holder further comprises a fuel inflow passage for supplying fuel to the first fuel chamber. 제1항에 있어서,
스텝핑 로드는 제2 개폐부에 윤활홈을 추가로 구비하는 것을 특징으로 하는 4 행정용 인젝션 밸브. The method according to claim 1,
Wherein the stepping rod further comprises a lubricant groove in the second opening and closing part. 제3항에 있어서,
윤활홈은 노즐의 폐쇄 시에 스텝핑 홀더의 분사홀 및 제2 연료실과 만나지 않는 위치에 형성되는 것을 특징으로 하는 4 행정용 인젝션 밸브. The method of claim 3,
Wherein the lubricant groove is formed at a position not meeting the injection hole of the stepping holder and the second fuel chamber at the time of closing the nozzle.
KR1020160002250A 2016-01-07 2016-01-07 Injection valve for 4 stroke engine KR101638815B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
KR1020160002250A KR101638815B1 (en) 2016-01-07 2016-01-07 Injection valve for 4 stroke engine
CN201710003580.3A CN106762304B (en) 2016-01-07 2017-01-04 Four stroke injection valves
DE102017200105.4A DE102017200105A1 (en) 2016-01-07 2017-01-05 Injection valve for a four-stroke operation
JP2017000789A JP6471373B2 (en) 2016-01-07 2017-01-05 4-stroke injection valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020160002250A KR101638815B1 (en) 2016-01-07 2016-01-07 Injection valve for 4 stroke engine

Publications (1)

Publication Number Publication Date
KR101638815B1 true KR101638815B1 (en) 2016-07-25

Family

ID=56616804

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020160002250A KR101638815B1 (en) 2016-01-07 2016-01-07 Injection valve for 4 stroke engine

Country Status (4)

Country Link
JP (1) JP6471373B2 (en)
KR (1) KR101638815B1 (en)
CN (1) CN106762304B (en)
DE (1) DE102017200105A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07332199A (en) * 1994-06-01 1995-12-22 Nippon Clean Engine Lab Co Ltd Double opening and closing multi-hole nozzle injection valve, compression ignition engine using it and ignition method therefor
JP2000179425A (en) * 1998-12-15 2000-06-27 Denso Corp Fuel injection device
JP2002048024A (en) * 2000-08-01 2002-02-15 Denso Corp Fuel injector
JP2006144774A (en) * 2004-10-18 2006-06-08 Denso Corp Gaseous fuel injector
KR20120074327A (en) 2009-10-30 2012-07-05 맨 디젤 앤드 터보 필리얼 아프 맨 디젤 앤드 터보 에스이 티스크랜드 A nozzle for a fuel valve in a diesel engine

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2711350A1 (en) * 1977-03-16 1978-09-21 Bosch Gmbh Robert FUEL INJECTION NOZZLE FOR COMBUSTION MACHINES
DE19843344A1 (en) * 1998-09-22 2000-03-23 Bosch Gmbh Robert Fuel injection valve for internal combustion engine has valve member axially movably positioned in bore of valve body, which has valve sealing surface at combustion chamber-side end
WO2001059293A1 (en) * 2000-02-07 2001-08-16 Robert Bosch Gmbh Injection nozzle
DE102006055792A1 (en) * 2006-11-27 2008-05-29 Robert Bosch Gmbh Fuel injection valve for internal combustion engines
KR101043745B1 (en) * 2006-12-15 2011-06-22 맨 디젤 앤드 터보 필리얼 아프 맨 디젤 앤드 터보 에스이 티스크랜드 A fuel injector for an internal combustion engine
WO2008071187A1 (en) * 2006-12-15 2008-06-19 Man Diesel A/S A fuel injector for an internal combustion engine
JP4686575B2 (en) 2008-06-24 2011-05-25 新潟原動機株式会社 Fuel injection device for diesel engine, method for manufacturing the same, and valve device
EP2386745B1 (en) * 2010-05-11 2013-02-13 Wärtsilä Switzerland Ltd. A fuel injector for internal combustion engines
JP5955258B2 (en) * 2013-03-29 2016-07-20 三菱重工業株式会社 Fuel injection device and diesel engine
CN204041321U (en) * 2014-07-09 2014-12-24 江苏大学 The needle valve assembly of fuel injection apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07332199A (en) * 1994-06-01 1995-12-22 Nippon Clean Engine Lab Co Ltd Double opening and closing multi-hole nozzle injection valve, compression ignition engine using it and ignition method therefor
JP2000179425A (en) * 1998-12-15 2000-06-27 Denso Corp Fuel injection device
JP2002048024A (en) * 2000-08-01 2002-02-15 Denso Corp Fuel injector
JP2006144774A (en) * 2004-10-18 2006-06-08 Denso Corp Gaseous fuel injector
KR20120074327A (en) 2009-10-30 2012-07-05 맨 디젤 앤드 터보 필리얼 아프 맨 디젤 앤드 터보 에스이 티스크랜드 A nozzle for a fuel valve in a diesel engine

Also Published As

Publication number Publication date
CN106762304B (en) 2018-09-25
JP6471373B2 (en) 2019-02-20
JP2017122453A (en) 2017-07-13
DE102017200105A1 (en) 2017-07-13
CN106762304A (en) 2017-05-31

Similar Documents

Publication Publication Date Title
US7438238B2 (en) Gaseous fuel injector
EP2325475B1 (en) High-pressure fuel pump
US8051826B2 (en) Injection system for an internal combustion engine
CN104747310A (en) Cylinder lubrication system for two-stroke engine
JP2016145548A (en) Lubrication device for internal combustion engine
KR20030012780A (en) Piston for two cycle engine
KR101638815B1 (en) Injection valve for 4 stroke engine
JPH04276182A (en) Fuel injector for 2-cycle engine
US20110100334A1 (en) Fuel injection system
EP2063081B1 (en) Piston crown with double re-entrant piston bowl
JP2011038414A (en) Piston for internal combustion engine
JP2015175245A (en) Piston cooling structure of engine
JP6885348B2 (en) Oil jet device
KR101344588B1 (en) engine
JP6737149B2 (en) engine
JPS59128909A (en) Cylinder of internal-combustion engine
CN1609413B (en) Apparatus and method for lessening the accumulation of high boiling fraction from fuel in intake valves of combustion engines
JP2010065603A (en) Lubricating oil supply structure of fuel pump
CN109469530A (en) Internal combustion engine valve protector
JP2019074015A (en) Piston of internal combustion engine
JP2019074013A (en) Piston of internal combustion engine
JP6685864B2 (en) Cylinder lubrication device and crosshead internal combustion engine
AU2007237179B2 (en) Engine
JP5404834B2 (en) Fuel injection pump
JPH07208134A (en) Cylinder oiling device

Legal Events

Date Code Title Description
AMND Amendment
AMND Amendment
X701 Decision to grant (after re-examination)
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20190709

Year of fee payment: 4

R401 Registration of restoration