KR20040028887A - The preventive device of fuel leakage in a LPG-automobile - Google Patents

The preventive device of fuel leakage in a LPG-automobile Download PDF

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Publication number
KR20040028887A
KR20040028887A KR1020040010968A KR20040010968A KR20040028887A KR 20040028887 A KR20040028887 A KR 20040028887A KR 1020040010968 A KR1020040010968 A KR 1020040010968A KR 20040010968 A KR20040010968 A KR 20040010968A KR 20040028887 A KR20040028887 A KR 20040028887A
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KR
South Korea
Prior art keywords
fuel
solenoid valve
lpg
engine
combustion chamber
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KR1020040010968A
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Korean (ko)
Inventor
박국현
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박국현
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Priority to KR1020040010968A priority Critical patent/KR20040028887A/en
Publication of KR20040028887A publication Critical patent/KR20040028887A/en
Priority to KR1020040072878A priority patent/KR100724240B1/en

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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
    • F02M21/0248—Injectors
    • F02M21/0251—Details of actuators therefor
    • F02M21/0254—Electric actuators, e.g. solenoid or piezoelectric
    • 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
    • F02M21/0248—Injectors
    • F02M21/0257—Details of the valve closing elements, e.g. valve seats, stems or arrangement of flow passages
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/30—Use of alternative fuels, e.g. biofuels

Abstract

PURPOSE: A device for preventing fuel leakage of an LPG vehicle is provided to block LPG fuel at a point communicated to a combustion chamber of an engine via a solenoid of an injector to prevent the fuel leakage to the combustion chamber. CONSTITUTION: A device for preventing fuel leakage of an LPG vehicle includes an electronic valve(16) mounted at a case(1) having a coupling element coupled to a combustion chamber of an engine and receiving an injector solenoid valve(2). The electronic valve is mounted in an operation space(7) formed at a position of the case wherein a fuel in the solenoid valve is flowing to a nozzle(4) via a fuel supply tube(6). As an ignition key is turned off, magnetic force of a core(10) and a rod core(11) forming the electronic valve is removed from a plunger(14) ground by the cores and simultaneously the plunger becomes advanced by a spring(15). A blocking element(12) at a front end of the plunger closely contacts a conical inlet(7a) of the operation space, thereby blocking the channel communicated to the fuel supply tube.

Description

엘피지자동차의 연료누설 방지장치 { The preventive device of fuel leakage in a LPG-automobile }Lpige Motor's fuel leakage prevention device {The preventive device of fuel leakage in a LPG-automobile}

본 발명은 LPG자동차의 연료누설방지장치에 관한 것이며 보다 상세하게는 LPG자동차에서 시동키이를 OFF시켰을 때 연료가 엔진의 연소실 내로 누설되지 않도록 한 것이다.The present invention relates to a fuel leakage preventing device for an LPG vehicle, and more particularly, to prevent fuel from leaking into the combustion chamber of an engine when the ignition key is turned off in the LPG vehicle.

자동차는 연료와 공기가 혼합되어 엔진의 연소실 내로 공급시켜서 점화 폭발되면 피스톤이 팽창되고 압축되는 왕복운동으로 크랭크축이 회전되어 엔진이 구동된다.In the automobile, the fuel and air are mixed and supplied into the combustion chamber of the engine, and when the ignition explosion occurs, the crank shaft is rotated by a reciprocating motion in which the piston is expanded and compressed to drive the engine.

이와 같은 엔진은 사용연료에 따라 가솔린엔진과 디젤엔진으로 구분되고 있다.Such engines are classified into gasoline and diesel engines according to the fuel used.

또한 봄베에 압축된 LPG와 같이 액화가스를 연료로 사용하는 LPG 자동차가 있으며, 동 LPG자동차에서 엔진의 연료공급과정은 약 5bar의 압력으로 압축된 봄베의 액화LPG가스를 기화시켜주는 베이퍼라이저와 공기와 혼합시켜주는 믹서를 거쳐 엔진의 연소실로 공급하는 수단과, 봄베 압력과 펌프로서 약15bar로 가압된 LPG를 액체 상태로 인젝터를 통하여 엔진의 연소실로 공급하는 수단(일명 LPI 엔진)이 사용되거나 알려지고 있다.In addition, there are LPG cars that use liquefied gas as fuel, such as LPG compressed in the cylinder.In the LPG car, the fuel supply process is vaporizer and air that vaporizes the compressed LPG gas of the compressed cylinder at a pressure of about 5 bar. Means for supplying the combustion chamber of the engine via a mixing mixer, and means for supplying LPG pressurized to about 15 bar as a cylinder pressure and a pump to the combustion chamber of the engine through an injector in liquid form (aka LPI engine) have.

여기에서 LPI 엔진의 경우에는 엔진을 정지하였을 때 인젝터에는 5~15 bar의압력의 LPG가 있게 된다.In the case of LPI engines, when the engine is stopped, the injector will have an LPG with a pressure of 5 to 15 bar.

또 인젝터는 솔레노이드 밸브와 액체상태의 LPG를 엔진 내부로 분사하는 노즐이 일체로 된 것으로서 솔레노이드밸브는 엑셀레이터의 동작에 따라 액체상태인 LPG연료가 엔진의 연소실 내로 유입되는 양을 조절하는 기능과 엔진이 정지하였을 때 LPG연료를 차단하는 기능을 동시에 갖게 되고, 또 인젝터는 엔진과 일체로 장착되어 엔진의 고열과 진동이 심한 사용환경과, 연료량을 조절하는 기능으로 인한 급격한 ON-OFF를 반복해야하므로 사용년한에 따라 마모가 진행되어 LPG연료를 차단하는 기능이 저하되어 LPG 연료가 엔진으로 누설되는 경우가 있으며, 이 경우에는 공기에 비하여 LPG가스가 과다하므로 시동이 걸리지 않거나 또는 시동이 걸리더라도 과량의 유해가스가 배기되어 환경오염의 중요요인으로 대두하고 있다.The injector is composed of a solenoid valve and a nozzle for injecting liquid LPG into the engine. The solenoid valve controls the amount of liquid LPG fuel flowing into the combustion chamber of the engine according to the operation of the accelerator. When stopped, LPG fuel is cut off at the same time, and the injector is integrated with the engine, so it is necessary to repeat the rapid on-off due to the high temperature and vibration of the engine and the control of fuel quantity. Depending on the age, wear may progress and the function of blocking LPG fuel may be deteriorated, causing LPG fuel to leak into the engine.In this case, LPG gas is excessive compared to air. Hazardous gases are being exhausted and become an important factor for environmental pollution.

이를 해소하는 수단으로 °국내공개특허공개번호2002-92051호,As a means to resolve this, domestic Patent Publication No. 2002-92051,

°국내공개특허공보2003-16792호,° Domestic Publication No. 2003-16792,

°국내공개특허공보2003-42380호,° Domestic Publication No. 2003-42380,

°국내공개특허공보2003-50162호등과 같이 LPG가스 자동차에서 시동키이를 OFF시켰을 때 인젝터 솔레노이드밸브에서 LPG가스가 누설되지 않도록 하기위하여 운전시 LPG압력을 봄베의 압력과 동일하도록 바이패스 라인을 설치하는 등 여러가지의 수단이 개발되고 있으나 근본적인 해결책이 되지 못하고 있다.To prevent LPG gas from leaking from the injector solenoid valve when the starter key is turned off in an LPG gas vehicle, such as in Korean Patent Publication No. 2003-50162, a bypass line is installed so that the LPG pressure is equal to the pressure of the cylinder during operation. Various means have been developed, but they are not a fundamental solution.

이에 본 발명은 LPG자동차 엔진의 연소실에 연료의 유입량을 조절하고 차단하는 기능을 하는 인젝터의 솔레노이드밸브를 거쳐 엔진의 연소실로 통하는 지점에서 전자밸브가 LPG연료를 차단하여 엔진의 연소실로 누설되는 것을 근원적으로 차단하는데 주된 목적이 있고 LPG자동차에서 시동성을 개선하고 배기가스의 발생량을 줄이는 부수적인 목적을 얻고자 하는 것이다.Accordingly, the present invention fundamentally prevents leakage of the solenoid valve from the LPG fuel to the combustion chamber of the engine through the solenoid valve of the injector, which controls and blocks the flow of fuel into the combustion chamber of the LPG vehicle engine. The main purpose is to improve the startability and reduce the amount of emissions in LPG vehicles.

도1은 본 발명의 종단면도1 is a longitudinal cross-sectional view of the present invention;

도2는 본 발명의 변형상태를 보인 종단면도Figure 2 is a longitudinal sectional view showing a modified state of the present invention

도3은 본 발명의 변형상태를 보인 종단면도Figure 3 is a longitudinal sectional view showing a modified state of the present invention

도4는 본 발명의 구성도4 is a block diagram of the present invention

도5는 본 발명의 동작상태를 보인 블럭도5 is a block diagram showing an operating state of the present invention.

도6은 종래 인젝터 솔레노이드밸브의 종단면도Figure 6 is a longitudinal cross-sectional view of a conventional injector solenoid valve

도면의 주요부분에 대한 부호 설명Explanation of symbols for the main parts of the drawings

1 : 케이스1a : 수납구1: Case 1a: Storage Port

1b : 나선부2 : 인젝터 솔레노이드 밸브1b: spiral part 2: injector solenoid valve

3 : 체결나사4 : 노즐3: tightening screw 4: nozzle

5 : 엔진체결구5a : 체결나선5: engine fastener 5a: fastening screw

6 : 연료공급관7 : 전자밸브 작동공간6: fuel supply pipe 7: solenoid valve operating space

7a : 원뿔형 입구10 : 코아7a: conical inlet 10: core

10a : 코일11 : 축봉코아10a: coil 11: shaft core

12 : 차단구13 : 스프링 수납홈12: blocking opening 13: spring receiving groove

14 : 플런져15 : 스프링14: Plunger 15: Spring

16 : 전자밸브16: solenoid valve

본 발명에서 도1은 종단면도Figure 1 is a longitudinal cross-sectional view in the present invention

도2와 도3은 변형사용예의 종단면도2 and 3 are longitudinal cross-sectional views of a modified use example.

도4는 구성도4 is a configuration diagram

도5는 동작상태의 블럭도를 보인 것이다.5 shows a block diagram of an operating state.

본 발명은 인젝터 솔레노이드밸브(Injector Solenoid Valve)가 수납되고 엔진의 연소실에 체결할 수 있는 체결구가 구비되는 케이스에서 인젝터 솔레노이드 밸브의 연료가 연료공급관을 통하여 노즐로 이어지는 일지점에 전자밸브의 작동공간을 형성하여 연료공급관으로 연료를 공급하고 차단하는 전자밸브를 설치하여서 구성된다.The present invention provides a working space of the solenoid valve at a point where the fuel of the injector solenoid valve is connected to the nozzle through the fuel supply pipe in a case in which an injector solenoid valve is received and a fastener for fastening to the combustion chamber of the engine is provided. It is formed by installing a solenoid valve for supplying fuel to the fuel supply pipe and cut off.

본 발명을 보다 구체적으로 설명하면 도1 내지 도3과 같이 인젝터 솔레노이드밸브(2)를 수납시키는 케이스(1)의 상부에는 수납구(1a)와 나선부(1b)를 구비하고 인젝터 솔레노이드밸브(2)를 수납시켜 체결나사(3)로 인젝터 솔레노이드밸브(2)를 케이스(1)에 장착하고, 케이스(1)의 하부에는 노즐(4)을 직렬로 위치시켜 외면에 체결나선(5a)이 구비된 엔진체결구(5)로 결합하고, 케이스(1)의 연료출구가 노즐(4)의 연료공급관(6)으로 이어지는 케이스(1)의 일지점에는 전자밸브 작동공간(7)을 구비하고, 코일(10a)이 권취된 코아(10)의 중공부 후방에축봉코아(11)를 결합하고 축봉코아(11) 전방에는 신축소재의 차단구(12)가 선단에 구비되고 후방에는 스프링 수납홈(13)이 구비된 플런져(14)의 스프링수납홈(13)에 스프링(15)을 끼워서 이를 함께 수납하여 구성되는 전자밸브(16)의 차단구(12)가 케이스(1)의 전자밸브 작동공간(7)에 형성되는 원뿔형입구(7a)에 위치되도록 장착시켜서 구성된다.When explaining the present invention in more detail as shown in Figs. 1 to 3, the upper portion of the case (1) for accommodating the injector solenoid valve (2) is provided with a receiving port (1a) and the spiral portion (1b) and injector solenoid valve (2) And insert the injector solenoid valve 2 into the case 1 with the fastening screw 3, and the nozzle 4 is placed in the lower part of the case 1 in series so that the fastening spiral 5a is provided on the outer surface. The solenoid valve operating space 7 is provided at one point of the case 1 coupled to the engine fastening hole 5, and the fuel outlet of the case 1 leads to the fuel supply pipe 6 of the nozzle 4. (10a) is coupled to the shaft rod core 11 in the rear of the hollow portion of the core (10) wound, and the front end of the shaft rod (11) is provided with a block opening 12 of the elastic material at the front end and the spring receiving groove (13) Solenoid valve 16 formed by inserting spring 15 into spring receiving groove 13 of plunger 14 provided with Is fitted so that the shut-off opening 12 of the case 1 is located in the conical inlet 7a formed in the solenoid valve operation space 7 of the case 1.

이와 같이 구성된 본 발명을 LPG자동차의 엔진 연소실에 통상과 같이 장착하고 시동키이를 ON 시켜 엔진을 구동시키면 고압의 LPG연료가 공급되고 인젝터 솔레노이드밸브(2)에서는 전자밸브 작동공간(7)으로 연료가 송출되고 전자밸브(16)도 함께 동작하여 코아(10)와 축봉코아(11)의 자력으로 플런져(14)를 당기면 스프링(15)을 압축하면서 플런져(14)가 축봉코아(11)로 이동되면서 연료공급관(6)으로 이어지는 원뿔형 입구(7a)에서 차단구(12)가 벗어나 연료공급관(6)으로 이어지는 통로가 열려 인젝터 솔레노이드밸브(2)에서 공급되는 연료는 노즐(4)로 공급되어 연소실로 분사가 이루어져 되고 엔진이 구동하게 되고, 또 자동차 엑셀레이터의 동작에 따라 인젝터 솔레노이드밸브(2)에는 연료의 공급량이 조절된다.When the present invention configured as described above is mounted in the engine combustion chamber of the LPG vehicle as usual and the engine is driven by turning on the ignition key, the high pressure LPG fuel is supplied, and the fuel is supplied from the injector solenoid valve 2 to the solenoid valve operating space 7. When the plunger 14 is pulled out by the magnetic force of the core 10 and the shaft rod 11, the solenoid valve 16 is also operated to compress the spring 15 while the plunger 14 moves to the shaft rod 11. As the movement moves through the conical inlet 7a leading to the fuel supply pipe 6, the shutoff opening 12 is opened, and the passage leading to the fuel supply pipe 6 is opened so that the fuel supplied from the injector solenoid valve 2 is supplied to the nozzle 4. The injection is made to the combustion chamber, the engine is driven, and the amount of fuel supplied to the injector solenoid valve 2 is adjusted according to the operation of the automobile accelerator.

또 시동키이를 OFF시키면 인젝터 솔레노이드밸브(2)와 전자밸브(16)는 동작이 정지되고 인젝터 솔레노이드밸브(2)와 봄베의 연료관 사이에는 연료가 고압의 상태로 잔류되어(바이패스라인이 구비된 경우에는 봄베압력과 같이 떨어지고) 인젝터 솔레노이드밸브(2)에서 엔진의 연소실로 누설이 되더라도 전자밸브(16)가 노즐(4)로 통하는 연료공급관(6)의 통로를 완벽하게 차단하므로 연소실 내로 연료의 누설이 해소된다.In addition, when the starter key is turned off, the injector solenoid valve 2 and the solenoid valve 16 are stopped and fuel remains at a high pressure between the injector solenoid valve 2 and the fuel pipe of the cylinder (bypass line is provided). In case of leaking to the combustion chamber of the engine from the injector solenoid valve 2, the solenoid valve 16 completely blocks the passage of the fuel supply pipe 6 to the nozzle 4, The leakage of is eliminated.

즉 전자밸브(16)가 전자밸브 작동공간(7)에서 연료공급관(6)의 통로를 차단하는 과정은 시동키이가 OFF되면 전자밸브(16)를 구성하는 코아(10)와 축봉코아(11)에 자력으로 접지상태에 있던 플런져(14)는 코아(10)와 축봉코아(11)의 자력이 제거됨과 동시에 스프링(15)의 탄발력으로 전진하게 되고 플런져(14) 선단의 차단구(12)가 전자밸브 작동공간(7)의 원뿔형 입구(7a)에 밀착되어 연료공급관(6)으로 이어지는 통로가 차단되어 연료가 엔진의 연소실로 누설되는 일이 해소되는 것이다.That is, the process in which the solenoid valve 16 blocks the passage of the fuel supply pipe 6 in the solenoid valve operating space 7 is performed when the starter key is turned off. The core 10 and the shaft rod 11 constituting the solenoid valve 16 are turned off. The plunger 14, which was in the ground state by magnetic force, is advanced by the elastic force of the spring 15 while the magnetic force of the core 10 and the shaft rod 11 is removed, and the breaker at the tip of the plunger 14 12 is in close contact with the conical inlet 7a of the solenoid valve operating space 7 to block the passage leading to the fuel supply pipe 6, thereby eliminating the leakage of fuel into the combustion chamber of the engine.

이 때 차단구(12)는 전자밸브 작동공간(7)의 원뿔형 입구(7a)에 밀착되어 차단될 때 스프링(15)의 탄력과 함께 차단구(12)는 신축성 있는 소재로 구성되므로 원뿔형 입구(7a)에서 긴밀한 차단이 이루어지게 되는 것이다.At this time, when the shut-off port 12 is in close contact with the conical inlet (7a) of the solenoid valve operating space (7) is blocked with the elasticity of the spring (15) conical inlet (conical inlet ( In 7a), a close blockage is made.

또 시동키이를 ON시켜 시동을 걸게 되면 봄베의 LPG가스연료가 인젝터 솔레노이드밸브(2)로 연료가 공급되고 전자밸브(16)를 거쳐 연료공급관(6)을 통하여 노즐(4)에서 엔진의 연소실로 분사가 이루어지게 되므로 시동이 걸릴 때 연료의 과량공급이 이루어지지 않게 되므로 시동성이 양호하고 연소실에 연료의 과량유입으로 인하여 시동초기에 과량의 유해 배기가스가 배출되는 폐단을 해소하게 된다.In addition, when the engine is started by turning on the starter key, the LPG gas fuel of the cylinder is supplied to the injector solenoid valve (2), and is supplied from the nozzle (4) to the combustion chamber of the engine through the fuel supply pipe (6) via the solenoid valve (16). Since the injection is performed, the excessive supply of fuel is not performed when the start is started, and thus the startability is good, and the excess end of the exhaust gas is discharged at the beginning of the start due to the excessive inflow of fuel into the combustion chamber.

이와 같이 본 발명은 LPG자동차의 인젝터 솔레노이드밸브에서 노즐을 거쳐 연소실로 공급되는 인젝터 솔레노이드밸브와 노즐 사이의 연료공급통로에 전자밸브를 설치하여 시동키이가 OFF 되었을 때 인젝터 솔레노이드 밸브에서 누설되는 연료를 전자밸브에서 완벽하게 차단할 수 있게 되므로 연료가 연소실로 누설되어 엔진의 시동시에 발생되는 시동성이 떨어지는 점과 시동이 걸리더라도 유해배기가스가과량이 발생되는 폐단을 해소할 수 있게 되는 것이다.In this way, the present invention is to install the solenoid valve in the fuel supply passage between the nozzle and the injector solenoid valve supplied to the combustion chamber through the nozzle in the injector solenoid valve of the LPG vehicle, the fuel leaked from the injector solenoid valve when the starter key is turned off Since the valve can be completely shut off, the fuel leaks into the combustion chamber, and the startability at the start of the engine is inferior, and even if the start is made, it is possible to eliminate the waste gas generated by the excessive exhaust gas.

따라서 이상과 같은 본 발명은 LPG 자동차에서 시동키이를 OFF시키면 전자밸브가 인젝터 솔레노이드밸브와 노즐 사이의 연료공급통로에서 연료의 공급을 완벽하게 차단하게 되어 엔진연소실로 연료가 누설되는 것을 방지하고, 시동키이를 ON시켜 시동을 걸 때 연료의 공급을 안정적으로 하여 시동성을 향상시키고 유해배기가스의 발생을 최소화할 수 있는 유용한 발명이다.Therefore, in the present invention as described above, when the starter key is turned off in the LPG vehicle, the solenoid valve completely blocks the supply of fuel in the fuel supply passage between the injector solenoid valve and the nozzle, thereby preventing the fuel from leaking into the engine combustion chamber, and starting the engine. It is a useful invention that can stabilize the supply of fuel when starting by turning on the key to improve startability and minimize the generation of harmful exhaust gas.

Claims (2)

인젝터 솔레노이드밸브가 수납되고 엔진의 연소실에 체결할 수 있는 체결구가 구비되는 케이스에서 인젝터 솔레노이드밸브의 연료가 연료공급관을 통하여 노즐로 이어지는 일지점에 전자밸브 작동공간을 구비하고 연료공급관으로 연료를 공급하고 차단하는 전자밸브를 설치하여서 됨을 특징으로 한 LPG 자동차의 연료누설방지장치In the case where the injector solenoid valve is accommodated and a fastener for fastening to the combustion chamber of the engine is provided, the solenoid valve operating space is provided at a point where the fuel of the injector solenoid valve is connected to the nozzle through the fuel supply pipe and the fuel is supplied to the fuel supply pipe. Fuel leakage prevention device for LPG cars 제1항에 있어서,The method of claim 1, 케이스(1)의 전자밸브 작동공간(7)에서 연료공급관(6)으로 이어지는 지점에 구비하는 원뿔형 입구(7a)와; 코일(10a)이 권취된 코아(10)의 중공부 후방에 축봉코아(11)를 결합하고, 축봉코아(11) 전방에는 신축소재의 차단구(12)가 구비되고 후방에는 스프링수납홈(13)이 구비된 플런져(14)와 스프링(15)을 함께 수납하여 구성되는 전자밸브(16)와; 전자밸브(16)의 차단구(12)가 전자밸브 작동공간(7)에 위치되도록 장착하여서 전자밸브(16)의 차단구(12)가 케이스(1)의 작동공간(7)에 구비된 원뿔형 입구(7a)에서 연료의 공급이 개폐되도록 구성됨을 특징으로 한 LPG자동차의 연료누설방지장치A conical inlet 7a provided at a point from the solenoid valve operating space 7 of the case 1 to the fuel supply pipe 6; The shaft rod core 11 is coupled to the rear of the hollow portion of the core 10 on which the coil 10a is wound, and the blocking rod 12 of the stretchable material is provided in front of the shaft rod core 11, and the spring storing groove 13 is located at the rear side. A solenoid valve (16) configured to receive a plunger (14) and a spring (15) together; The shut-off opening 12 of the solenoid valve 16 is mounted in the solenoid valve operating space 7 so that the shut-off opening 12 of the solenoid valve 16 is provided in the operating space 7 of the case 1. Fuel leakage preventing device of LPG vehicle, characterized in that the supply of fuel is opened and closed at the inlet (7a)
KR1020040010968A 2004-02-19 2004-02-19 The preventive device of fuel leakage in a LPG-automobile KR20040028887A (en)

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KR20060021081A (en) * 2004-09-02 2006-03-07 현대자동차주식회사 Fuel leak preventing structure of injector in lpg vehicles
KR100718845B1 (en) * 2006-05-11 2007-05-16 (주)모토닉 The preventive device of injector fuel leakage in a automobile
KR20140075697A (en) * 2011-09-14 2014-06-19 매트릭스 에스.피.에이. Injector for a system for feeding gas fuel to an internal combustion engine
KR20220055146A (en) * 2020-10-26 2022-05-03 주식회사 현대케피코 Injector for preventing fuel leakage and control method thereof

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KR20060021081A (en) * 2004-09-02 2006-03-07 현대자동차주식회사 Fuel leak preventing structure of injector in lpg vehicles
KR100718845B1 (en) * 2006-05-11 2007-05-16 (주)모토닉 The preventive device of injector fuel leakage in a automobile
KR20140075697A (en) * 2011-09-14 2014-06-19 매트릭스 에스.피.에이. Injector for a system for feeding gas fuel to an internal combustion engine
KR20220055146A (en) * 2020-10-26 2022-05-03 주식회사 현대케피코 Injector for preventing fuel leakage and control method thereof

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