KR20080052749A - Injector leakage preventing system for a liquefied petroleum injection engine - Google Patents

Injector leakage preventing system for a liquefied petroleum injection engine Download PDF

Info

Publication number
KR20080052749A
KR20080052749A KR1020060124310A KR20060124310A KR20080052749A KR 20080052749 A KR20080052749 A KR 20080052749A KR 1020060124310 A KR1020060124310 A KR 1020060124310A KR 20060124310 A KR20060124310 A KR 20060124310A KR 20080052749 A KR20080052749 A KR 20080052749A
Authority
KR
South Korea
Prior art keywords
fuel
valve
valve spool
return line
suction
Prior art date
Application number
KR1020060124310A
Other languages
Korean (ko)
Other versions
KR100837978B1 (en
Inventor
조석구
Original Assignee
현대자동차주식회사
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 현대자동차주식회사 filed Critical 현대자동차주식회사
Priority to KR1020060124310A priority Critical patent/KR100837978B1/en
Publication of KR20080052749A publication Critical patent/KR20080052749A/en
Application granted granted Critical
Publication of KR100837978B1 publication Critical patent/KR100837978B1/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
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02M21/023—Valves; Pressure or flow regulators in the fuel supply or return system
    • F02M21/0242—Shut-off valves; Check valves; Safety valves; Pressure relief valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02M21/023—Valves; Pressure or flow regulators in the fuel supply or return system
    • F02M21/0233—Details of actuators therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/24—Fuel-injection apparatus with sensors
    • F02M2200/248—Temperature sensors
    • 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)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

An injector leakage preventing system of a liquefied petroleum injection engine is provided to reduce the number of parts, and to prevent fuel leakage more certainly. An injector leakage preventing system of a liquefied petroleum injection engine comprises a fuel supply line(5), a bypass pipe(9), a fuel return line(11), a check valve(13), a suction pipe(15) and a valve unit(17). The fuel supply line is connected to a discharge part of a fuel pump(1), and equipped with a cutoff valve(3). The bypass pipe is branched from the fuel supply line, and guides fuel inside a fuel tank(7). The fuel return line is connected to a suction part of the fuel pump. The check valve is installed to the fuel return line, and prevents backflow of fuel. The suction pipe is installed to the suction part of the fuel pump, and sucks fuel inside the fuel tank. The valve unit selectively opens and closes the suction pipe and the bypass pipe.

Description

엘피아이 엔진의 인젝터 누기 방지 시스템{injector leakage preventing system for a liquefied petroleum injection engine}Injector leakage preventing system for a liquefied petroleum injection engine}

도 1은 본 발명에 따른 엘피아이 엔진의 인젝터 누기 방지 시스템의 구성도,1 is a configuration of the injector leakage prevention system of the Elpiai engine according to the present invention,

도 2는 본 발명의 밸브수단의 일예를 설명한 도면,2 is a view for explaining an example of the valve means of the present invention;

도 3은 본 발명의 밸브수단의 다른 실시예를 설명한 도면,3 is a view for explaining another embodiment of the valve means of the present invention;

도 4는 본 발명의 밸브수단의 또 다른 실시예를 설명한 도면,4 is a view for explaining another embodiment of the valve means of the present invention;

도 5 내지 도 7은 본 발명의 작용을 설명한 도면이다.5 to 7 illustrate the operation of the present invention.

<도면의 주요 부분에 대한 부호의 간단한 설명><Brief description of symbols for the main parts of the drawings>

1; 연료펌프 3; 차단밸브One; Fuel pump 3; Shut-off valve

5; 연료공급라인 7; 연료탱크5; Fuel supply line 7; Fuel tank

9; 바이패스관 11; 연료리턴라인9; Bypass tube 11; Fuel return line

13; 체크밸브 15; 흡입관13; Check valve 15; suction

17; 밸브수단 19; 온도센서17; Valve means 19; temperature Senser

21; 인젝터 23; 레귤레이터21; Injector 23; regulator

25; 압력센서 27; 밸브스풀25; Pressure sensor 27; Valve spool

29; 솔레노이드 31; 탄성부재29; Solenoid 31; Elastic member

본 발명은 엘피아이 엔진의 인젝터 누기 방지 시스템에 관한 것으로서, 보다 상세하게는 엔진의 시동을 끈 후 엔진룸의 고온으로 인하여 연료리턴라인에 잔존하는 연료의 압력이 상승하여 인젝터를 통해 누출되는 것을 방지하는 기술에 관한 것이다.The present invention relates to a system for preventing injector leakage of an Elpia engine, and more particularly, to prevent leakage of the fuel remaining in the fuel return line due to the high temperature of the engine room after the engine is turned off and leaking through the injector. It is about technology to do.

엘피아이엔진의 가장 큰 문제점 중의 하나로 지적되고 있는 것은 상기한 바와 같이 엔진이 작동한 후 엔진의 시동을 껐을 때, 엔진룸 내에 형성된 높은 온도에 의해 미처 리턴되지 못하고 연료리턴라인에 잔류하는 연료의 압력이 상승되어, 인젝터를 통하여 누출되는 것이다.One of the biggest problems of the LPI engine is that the pressure of the fuel remaining in the fuel return line is not returned due to the high temperature formed in the engine compartment when the engine is turned off after the engine is operated as described above. Is raised and leaks through the injector.

상기와 같이 인젝터를 통하여 연료가 누출되면, 엔진의 다음 시동시에 연료량의 지나친 과다로 시동불량, 시동지연 및 배기유해물질의 과다 등의 원인이 된다.If the fuel leaks through the injector as described above, the excessive amount of fuel at the next start of the engine may cause starting failure, start delay, and excessive exhaust harmful substances.

따라서, 종래에 상기한 바와 같은 문제점을 해결하기 위한 다양한 방법이 제안되어 왔지만, 연료의 누기 문제를 완전히 해결하기 어렵거나, 추가되는 부품이 많고 복잡하여 경제성이 떨어지는 등의 문제점을 수반하고 있다.Therefore, various methods for solving the problems as described above have been proposed in the past, but it is difficult to completely solve the problem of leakage of fuel, or it is accompanied with problems such as the economical efficiency due to the large number of additional parts and complexity.

본 발명은 상기한 바와 같은 문제점을 해결하기 위하여 안출된 것으로서, 기존의 연료공급시스템에 추가되는 부품의 수가 극히 적으면서도, 인젝터를 통한 연료의 누출문제를 보다 확실하게 방지할 수 있도록 하는 엘피아이 엔진의 인젝터 누기 방지 시스템을 제공함에 그 목적이 있다.The present invention has been made to solve the problems described above, while the number of parts added to the existing fuel supply system, while the number of parts, the Elpiai engine to more reliably prevent the leakage of fuel through the injector Its purpose is to provide an injector leakage prevention system.

상기한 바와 같은 목적을 달성하기 위한 본 발명 엘피아이 엔진의 인젝터 누기 방지 시스템은Injector leakage prevention system of the present invention Elpia engine for achieving the object as described above

연료펌프의 토출측에 연결되고 차단밸브가 구비된 연료공급라인과;A fuel supply line connected to the discharge side of the fuel pump and provided with a shutoff valve;

상기 연료공급라인으로부터 분지되어 연료탱크 내로 연료를 안내하도록 된 바이패스관과;A bypass pipe branched from the fuel supply line to guide fuel into the fuel tank;

상기 연료펌프의 흡입측으로 연결되는 연료리턴라인과;A fuel return line connected to the suction side of the fuel pump;

상기 연료리턴라인에 설치되어 연료의 역류를 방지하는 체크밸브와;A check valve installed at the fuel return line to prevent backflow of fuel;

상기 연료펌프의 흡입측에 설치되어 연료탱크 내부의 연료를 흡입하는 흡입관과;A suction pipe installed at the suction side of the fuel pump to suck fuel in the fuel tank;

상기 흡입관과 바이패스관을 선택적으로 개방 및 폐쇄시키도록 구비된 밸브수단;Valve means provided to selectively open and close the suction pipe and the bypass pipe;

을 포함하여 구성된 것을 특징으로 한다.Characterized in that configured to include.

이하, 첨부된 도면을 참조하여 본 발명의 바람직한 실시예를 설명하면 다음과 같다.Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

도 1을 참조하면, 본 발명 실시예는 연료펌프(1)의 토출측에 연결되고 차단밸브(3)가 구비된 연료공급라인(5)과; 상기 연료공급라인(5)으로부터 분지되어 연료탱크(7) 내로 연료를 안내하도록 된 바이패스관(9)과; 상기 연료펌프(1)의 흡입 측으로 연결되는 연료리턴라인(11)과; 상기 연료리턴라인(11)에 설치되어 연료의 역류를 방지하는 체크밸브(13)와; 상기 연료펌프(1)의 흡입측에 설치되어 연료탱크(7) 내부의 연료를 흡입하는 흡입관(15)과; 상기 흡입관(15)과 바이패스관(9)을 선택적으로 개방 및 폐쇄시키도록 구비된 밸브수단(17)을 포함하여 구성된다.1, the embodiment of the present invention includes a fuel supply line 5 connected to the discharge side of the fuel pump 1 and provided with a shutoff valve 3; A bypass pipe (9) branched from the fuel supply line (5) to guide fuel into the fuel tank (7); A fuel return line 11 connected to the suction side of the fuel pump 1; A check valve 13 installed at the fuel return line 11 to prevent backflow of fuel; A suction pipe 15 installed at the suction side of the fuel pump 1 to suck fuel in the fuel tank 7; And valve means (17) provided to selectively open and close the suction pipe (15) and the bypass pipe (9).

참고로 도 1의 연료공급라인에는 상기와 또 다른 차단밸브(4)와 온도센서(19) 및 인젝터(21)들이 구비되어 있으며, 연료리턴라인(11)에는 레귤레이터(23)와 압력센서(25)가 구비되어 있다.For reference, the fuel supply line of FIG. 1 is provided with another shutoff valve 4, a temperature sensor 19, and an injector 21, and a fuel return line 11 includes a regulator 23 and a pressure sensor 25. ) Is provided.

본 실시예에서 상기 연료리턴라인(11)은 상기 흡입관(15)의 중간부분으로 연결되어 상기 연료펌프(1)의 흡입측으로 연결되도록 하였다.In this embodiment, the fuel return line 11 is connected to the middle portion of the suction pipe 15 to be connected to the suction side of the fuel pump 1.

한편, 상기 밸브수단(17)은 도 2에 도시된 바와 같이, 밸브스풀(27)의 양측 단부는 각각 상기 흡입관(15)과 바이패스관(9)을 선택적으로 개방 및 폐쇄시키도록 형성되고, 상기 밸브스풀(27)의 중앙부는 솔레노이드(29)에 의해 밸브스풀(27)이 직선슬라이딩하는 동력을 인가 받도록 구성되고, 상기 솔레노이드(29)에 의해 밸브스풀(27)이 직선슬라이딩하는 방향의 반대방향으로 상기 밸브스풀(27)을 탄성지지하는 탄성부재(31)를 구비한 구조를 취하였다.On the other hand, the valve means 17, as shown in Figure 2, both ends of the valve spool 27 is formed to selectively open and close the suction pipe 15 and the bypass pipe 9, respectively, The central portion of the valve spool 27 is configured to receive the power to linearly slide the valve spool 27 by the solenoid 29, the opposite of the direction in which the valve spool 27 is linear sliding by the solenoid 29 The elastic member 31 which elastically supports the said valve spool 27 in the direction was taken.

물론, 상기 밸브수단(17)의 다른 실시예로는 도 3에 도시된 바와 같이, 밸브스풀(27)의 일측은 직선슬라이딩하여 상기 흡입관(15)과 바이패스관(9)을 선택적으로 개방 및 폐쇄시키도록 형성되고, 상기 밸브스풀(27)의 타측은 솔레노이드(29)에 의해 밸브스풀(27)이 직선슬라이딩하는 동력을 인가 받도록 구성되고, 상기 솔 레노이드(29)에 의해 밸브스풀(27)이 직선슬라이딩하는 방향의 반대방향으로 상기 밸브스풀(27)을 탄성지지하는 탄성부재(31)를 구비한 구조로 할 수도 있을 것이다.Of course, in another embodiment of the valve means 17, as shown in Figure 3, one side of the valve spool 27 is linearly slid to selectively open the suction pipe 15 and the bypass pipe 9 and It is formed to close, the other side of the valve spool 27 is configured to be applied by the solenoid 29 the power to the linear sliding of the valve spool 27, the valve spool 27 by the solenoid 29 ) May have a structure having an elastic member 31 for elastically supporting the valve spool 27 in a direction opposite to the direction in which linear sliding is performed.

또한, 상기 밸브수단(17)은 보다 컴팩트한 구성을 위하여, 도 4에 도시된 바와 같이 상기 체크밸브(13)를 밸브바디 내에 일체로 구비하도록 할 수 있을 것인 바, 이 경우 상기 연료리턴라인(11)의 일부는 상기 밸브바디 내에 형성된 유로로 구성되게 된다.In addition, the valve means 17 may be provided with the check valve 13 in the valve body as shown in Figure 4, for a more compact configuration, in this case the fuel return line A part of 11 is made up of a flow path formed in the valve body.

본 실시예는 도 2에 도시된 바와 같은 형식의 밸브수단(17)을 이용하여 설명하기로 한다.This embodiment will be described using the valve means 17 of the type shown in FIG.

도 5 내지 도 7을 참조하여 본 발명의 작용을 살펴보면 다음과 같다.Looking at the operation of the present invention with reference to Figures 5 to 7 as follows.

도 5는 엔진의 운전시 작동 상태를 설명한 것으로서, 연료펌프(1)가 구동되어 상기 흡입관(15)을 통해 연료탱크(7) 내부의 연료를 흡입 및 펌핑하여, 상기 연료공급라인(5)으로 송출한다.FIG. 5 illustrates an operation state of the engine, in which a fuel pump 1 is driven to suck and pump fuel in the fuel tank 7 through the suction pipe 15 to the fuel supply line 5. Send it out.

물론, 상기 차단밸브(3)는 개방되어 연료가 원활히 공급될 수 있는 상태이며, 상기 연료리턴라인(11)을 통해서는 리턴되는 연료가 회수되며, 상기 밸브수단(17)의 밸브스풀(27)은 솔레노이드(29)의 작동에 의해 도시된 바와 같이 바이패스관(9)을 차단하고 흡입관(15)을 개방한 상태이다.Of course, the shutoff valve (3) is open and the fuel can be supplied smoothly, the returned fuel is recovered through the fuel return line 11, the valve spool (27) of the valve means (17) As shown by the operation of the solenoid 29, the bypass pipe 9 is blocked and the suction pipe 15 is open.

엔진의 시동을 끄면, 엔진컨트롤러가 도 6과 같이 상기 차단밸브(3)를 차단시키고, 상기 밸브수단(17)의 솔레노이드(29) 전원을 차단하여, 상기 흡입관(15)은 차단되고 바이패스관(9)이 개방된 상태로 한 상태에서, 상기 연료펌프(1)를 구동한다.When the engine is turned off, the engine controller shuts off the shut-off valve 3 as shown in FIG. 6 and shuts off the solenoid 29 of the valve means 17, so that the suction pipe 15 is cut off and the bypass pipe. The fuel pump 1 is driven in the state in which 9 is opened.

따라서, 상기 연료리턴라인(11)의 연료는 상기 연료펌프(1)의 펌핑 작용에 의해 상기 체크밸브(13)를 통과하여 상기 연료펌프(1)에서 펌핑되며, 상기 연료펌프(1)에서 토출되는 연료는 상기 바이패스관(9)을 통하여 연료탱크(7)로 회수된다.Therefore, the fuel of the fuel return line 11 is pumped from the fuel pump 1 through the check valve 13 by the pumping action of the fuel pump 1, discharged from the fuel pump 1 The fuel to be recovered is returned to the fuel tank 7 through the bypass pipe 9.

상기와 같은 작용은 상기 연료리턴라인(11)에 설치된 레귤레이터(23)에 구비된 압력센서(25)로 모니터링 하면서 연료리턴라인(11) 내부의 압력이 충분히 떨어질 때까지 지속한다.The above operation continues until the pressure inside the fuel return line 11 drops sufficiently while monitoring with the pressure sensor 25 provided in the regulator 23 installed in the fuel return line 11.

상기 연료리턴라인(11)의 내부 압력이 충분히 떨어지면, 엔진컨트롤러는 도 7과 같이 상기 연료펌프(1)의 구동을 멈춘다. When the internal pressure of the fuel return line 11 drops sufficiently, the engine controller stops driving the fuel pump 1 as shown in FIG. 7.

상기 연료공급라인(5)과 연료리턴라인(11)은 각각 상기 차단밸브(3)와 체크밸브(13)로 폐쇄되어 있어서, 더 이상의 추가적인 연료의 유입이 방지되며, 상기한 바와 같이 연료공급라인(5) 및 연료리턴라인(11)에는 인젝터(21)를 통하여 누출될 연료압이 형성될 수 없는 정도로 내부의 압력이 충분히 저하된 상태이므로, 엘피아이 엔진의 인젝터(21)를 통한 연료의 누출이 효과적으로 방지되게 된다.The fuel supply line 5 and the fuel return line 11 are closed by the shutoff valve 3 and the check valve 13, respectively, to prevent further inflow of fuel, as described above. (5) and the fuel return line 11 is a state in which the internal pressure is sufficiently lowered to the extent that the fuel pressure to be leaked through the injector 21 cannot be formed, so the fuel leaks through the injector 21 of the Elpia engine. This can be effectively prevented.

이상과 같이 본 발명에 의하면, 기존의 연료공급시스템에 추가되는 부품의 수가 극히 적으면서도, 인젝터를 통한 연료의 누출문제를 보다 확실하게 방지할 수 있도록 한다.As described above, according to the present invention, it is possible to more reliably prevent the problem of leakage of fuel through the injector while the number of parts added to the existing fuel supply system is extremely small.

Claims (5)

연료펌프의 토출측에 연결되고 차단밸브가 구비된 연료공급라인과;A fuel supply line connected to the discharge side of the fuel pump and provided with a shutoff valve; 상기 연료공급라인으로부터 분지되어 연료탱크 내로 연료를 안내하도록 된 바이패스관과;A bypass pipe branched from the fuel supply line to guide fuel into the fuel tank; 상기 연료펌프의 흡입측으로 연결되는 연료리턴라인과;A fuel return line connected to the suction side of the fuel pump; 상기 연료리턴라인에 설치되어 연료의 역류를 방지하는 체크밸브와;A check valve installed at the fuel return line to prevent backflow of fuel; 상기 연료펌프의 흡입측에 설치되어 연료탱크 내부의 연료를 흡입하는 흡입관과;A suction pipe installed at the suction side of the fuel pump to suck fuel in the fuel tank; 상기 흡입관과 바이패스관을 선택적으로 개방 및 폐쇄시키도록 구비된 밸브수단;Valve means provided to selectively open and close the suction pipe and the bypass pipe; 을 포함하여 구성된 것을 특징으로 하는 엘피아이 엔진의 인젝터 누기 방지 시스템.Elpia engine injector leakage prevention system, characterized in that configured to include. 청구항 1에 있어서,The method according to claim 1, 상기 연료리턴라인은 상기 흡입관의 중간부분으로 연결되어 상기 연료펌프의 흡입측으로 연결되는 것The fuel return line is connected to the middle portion of the suction pipe is connected to the suction side of the fuel pump 을 특징으로 하는 엘피아이 엔진의 인젝터 누기 방지 시스템.Injector leakage prevention system of the Elpia engine. 청구항 1에 있어서, 상기 밸브수단은The method according to claim 1, wherein the valve means 밸브스풀의 일측은 직선슬라이딩하여 상기 흡입관과 바이패스관을 선택적으로 개방 및 폐쇄시키도록 형성되고;One side of the valve spool is formed to linearly slide to selectively open and close the suction pipe and the bypass pipe; 상기 밸브스풀의 타측은 솔레노이드에 의해 밸브스풀이 직선슬라이딩하는 동력을 인가 받도록 구성되고;The other side of the valve spool is configured to receive power to linearly slide the valve spool by the solenoid; 상기 솔레노이드에 의해 밸브스풀이 직선슬라이딩하는 방향의 반대방향으로 상기 밸브스풀을 탄성지지하는 탄성부재를 구비한 것And an elastic member for elastically supporting the valve spool in a direction opposite to the direction in which the valve spool is linearly slid by the solenoid. 을 특징으로 하는 엘피아이 엔진의 인젝터 누기 방지 시스템.Injector leakage prevention system of the Elpia engine. 청구항 1에 있어서, 상기 밸브수단은The method according to claim 1, wherein the valve means 밸브스풀의 양측 단부는 각각 상기 흡입관과 바이패스관을 선택적으로 개방 및 폐쇄시키도록 형성되고;Both ends of the valve spool are configured to selectively open and close the suction pipe and the bypass pipe, respectively; 상기 밸브스풀의 중앙부는 솔레노이드에 의해 밸브스풀이 직선슬라이딩하는 동력을 인가 받도록 구성되고;A central portion of the valve spool is configured to be energized by the solenoid so that the valve spool is linearly sliding; 상기 솔레노이드에 의해 밸브스풀이 직선슬라이딩하는 방향의 반대방향으로 상기 밸브스풀을 탄성지지하는 탄성부재를 구비한 것And an elastic member for elastically supporting the valve spool in a direction opposite to the direction in which the valve spool is linearly slid by the solenoid. 을 특징으로 하는 엘피아이 엔진의 인젝터 누기 방지 시스템.Injector leakage prevention system of the Elpia engine. 청구항 1에 있어서, 상기 밸브수단은The method according to claim 1, wherein the valve means 상기 체크밸브를 밸브바디 내에 일체로 구비한 것Integrally provided with said check valve in a valve body 을 특징으로 하는 엘피아이 엔진의 인젝터 누기 방지 시스템.Injector leakage prevention system of the Elpia engine.
KR1020060124310A 2006-12-08 2006-12-08 injector leakage preventing system for a liquefied petroleum injection engine KR100837978B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020060124310A KR100837978B1 (en) 2006-12-08 2006-12-08 injector leakage preventing system for a liquefied petroleum injection engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020060124310A KR100837978B1 (en) 2006-12-08 2006-12-08 injector leakage preventing system for a liquefied petroleum injection engine

Publications (2)

Publication Number Publication Date
KR20080052749A true KR20080052749A (en) 2008-06-12
KR100837978B1 KR100837978B1 (en) 2008-06-13

Family

ID=39807285

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020060124310A KR100837978B1 (en) 2006-12-08 2006-12-08 injector leakage preventing system for a liquefied petroleum injection engine

Country Status (1)

Country Link
KR (1) KR100837978B1 (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19980047410A (en) * 1996-12-14 1998-09-15 박병재 Vehicle fuel supply
US6422203B1 (en) * 1999-02-17 2002-07-23 Stanadyne Corporation Variable output pump for gasoline direct injection
KR100692130B1 (en) * 2004-09-09 2007-03-12 현대자동차주식회사 System for eliminating fuel line pressure of injector for lpi engine

Also Published As

Publication number Publication date
KR100837978B1 (en) 2008-06-13

Similar Documents

Publication Publication Date Title
JP4138444B2 (en) Fuel injection device used for internal combustion engine
KR20070003029A (en) A fuel supplying apparatus in lpi engine
WO2016088339A1 (en) High-pressure pump and fuel-supply system using same
RU2670642C9 (en) Heating device for a vehicle with a fuel hydraulic accumulator near the nozzle
US9382886B2 (en) Fuel system and corresponding method
US7293551B2 (en) Liquefied gas-fuel supply device for diesel engine
US20120180765A1 (en) Diesel fuel system with advanced priming
CN106150798B (en) Low-pressure fuel supply system
JP2007120423A (en) Fuel supply device for low boiling point fuel
CN110578625A (en) Internal combustion engine with water injection device and method for operating an internal combustion engine
KR100837978B1 (en) injector leakage preventing system for a liquefied petroleum injection engine
JP4211733B2 (en) Common rail fuel injection system
EP2735722B1 (en) Fuel system for an excavator
CN107288787B (en) Fuel injection system
KR20100117766A (en) Lpi system
KR20150018448A (en) Valve arrangement for a fuel supply system and fuel supply system
WO2018047021A1 (en) Dual fuel direct injection system for feeding internal combustion engines
JP2004278491A (en) Fuel injecting device for internal combustion engine
ATE337483T1 (en) FUEL PRESSURE CONTROL SYSTEM FOR AN INTERNAL COMBUSTION ENGINE
CN109469563B (en) Water jet installation with at least two tanks
KR100748745B1 (en) fuel supply system for LPI engine in automobile
JP2007064197A (en) Fuel leakage prevention device of lpi injector
KR20150043309A (en) Injection device for an internal combustion engine
CN102203406A (en) Fuel rail vent system
KR100692070B1 (en) Fuel system of the LPI engine

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E90F Notification of reason for final refusal
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20130531

Year of fee payment: 6

FPAY Annual fee payment

Payment date: 20140529

Year of fee payment: 7

FPAY Annual fee payment

Payment date: 20150529

Year of fee payment: 8

LAPS Lapse due to unpaid annual fee