KR20110016074A - Lpi system for gas vehicle - Google Patents

Lpi system for gas vehicle Download PDF

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Publication number
KR20110016074A
KR20110016074A KR1020090073586A KR20090073586A KR20110016074A KR 20110016074 A KR20110016074 A KR 20110016074A KR 1020090073586 A KR1020090073586 A KR 1020090073586A KR 20090073586 A KR20090073586 A KR 20090073586A KR 20110016074 A KR20110016074 A KR 20110016074A
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South Korea
Prior art keywords
fuel
nozzle
cylinder
seating groove
gas vehicle
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KR1020090073586A
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Korean (ko)
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KR101094882B1 (en
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강명권
유해찬
장우덕
신용남
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(주)모토닉
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/04—Feeding by means of driven pumps
    • F02M37/08—Feeding by means of driven pumps electrically driven
    • F02M37/10—Feeding by means of driven pumps electrically driven submerged in fuel, e.g. in reservoir
    • F02M37/103—Mounting pumps on fuel tanks
    • 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
    • F02M21/0203—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels characterised by the type of gaseous fuel
    • F02M21/0215—Mixtures of gaseous fuels; Natural gas; Biogas; Mine gas; Landfill gas
    • 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
    • F02M21/0236—Multi-way valves; Multiple valves forming a multi-way valve system
    • 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
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/0011—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor
    • F02M37/0017—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor related to fuel pipes or their connections, e.g. joints or sealings
    • 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
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/0047—Layout or arrangement of systems for feeding fuel
    • F02M37/0052—Details on the fuel return circuit; Arrangement of pressure regulators
    • 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: An LPI system for a gas vehicle is provided to prevent damage to a pressure controller by preventing the negative pressure formation of a fuel recovery pipe. CONSTITUTION: An LPI system for a gas vehicle comprises a bottle, a multi valve, a fuel pump, an engine, an inlet port(61), a vent(62), a nozzle(63) and a connector(64). The multi valve is installed in the bottle. The fuel pump is connected with the multi valve and transmits the gas fuel saved in the bottle. The bottom of the spring is supported in with a packing(V3). The upper end of the spring is supported with a lid(V6) blocking up a seating groove.

Description

가스차량용 엘피아이 시스템{LPI system for gas vehicle}LPI system for gas vehicle

본 발명은 가스차량용 엘피아이 시스템에 관한 것으로, 더욱 상세하게는 봄베 내에 제트노즐이 설치되며, 연료회수라인으로부터 회수된 연료를 압력발생원으로 하여 벤츄리효과에 의해 연료를 가속시켜 연료펌프에 공급할 수 있도록 하여 구조가 간결해질 수 있고, 제트노즐에 연료회수관의 고압연료 유입시 개방되는 벤트부를 형성하여 고압상태를 해소하도록 한 가스차량용 엘피아이 시스템에 관한 것이다.The present invention relates to a gas vehicle lpai system, more specifically, a jet nozzle is installed in the cylinder, the fuel recovered from the fuel recovery line as a pressure source to accelerate the fuel by the venturi effect to supply the fuel pump The present invention relates to a gas vehicle Elpia system, which can simplify the structure, and forms a vent that opens when the high pressure fuel is introduced into the fuel recovery pipe in the jet nozzle.

일반적으로 가스차량용 엘피아이 시스템(Liquid Petroleum Injection: LPG 액상 연료분사 장치)은 연료탱크의 압력에 의존한 기계식 LPG 연료 방식과는 달리 봄베 내에 연료펌프를 설치하고, 상기 연료펌프에 의해 고압(5~15bar)으로 송출되는 액상 연료를 인젝터로 분사하여 엔진을 구동하는 구조로 되어 있다.In general, LPG liquid fuel injection device for gas vehicle, unlike the mechanical LPG fuel method that depends on the pressure of the fuel tank, installs the fuel pump in the cylinder, and the high pressure (5 ~ 15bar) is injected into the injector of the liquid fuel to drive the engine.

도 1은 종래의 엘피아이 시스템을 나타낸 도면이다.1 is a view showing a conventional ELPAI system.

도 1에 도시된 바와 같이, 종래의 엘피아이 시스템(M')은 연료가 저장되는 봄베(2')와, 상기 봄베(2') 내에 저장된 연료를 펌핑하여 송출하는 펌프모듈과, 상 기 펌프모듈을 통해 공급되는 액상의 연료를 인젝터(52')에 의해 분사하여 구동되는 엔진(5')을 포함한다.As shown in FIG. 1, the conventional Elpiai system M 'includes a cylinder 2' in which fuel is stored, a pump module for pumping out the fuel stored in the cylinder 2 ', and the pump. It includes an engine 5 'driven by injecting the liquid fuel supplied through the module by the injector 52'.

그리고 상기 펌프모듈은 상기 봄베(2')에 설치된 멀티밸브(3')와 연료공급라인(S')에 설치되어 연료를 펌핑하는 연료펌프(4')를 포함하며, 상기 연료펌프(4')는 ECU(미도시)에 의해서 제어된다.The pump module includes a multi-valve 3 'installed at the cylinder 2' and a fuel pump 4 'installed at the fuel supply line S' to pump fuel, and the fuel pump 4 ' Is controlled by an ECU (not shown).

또 연료공급라인(S')에는 연료펌프(4')의 후방에 연료필터(7')와 솔레노이드 밸브(8')가 각기 설치된다.The fuel supply line S 'is provided with a fuel filter 7' and a solenoid valve 8 ', respectively, behind the fuel pump 4'.

또한 연료회수라인(R')에는 압력조절기(9')가 설치된다.In addition, a pressure regulator 9 'is installed in the fuel recovery line R'.

따라서 상기 연료펌프(4')를 통해 공급되는 연료는 연료공급라인(S')을 통과한 후 인젝터(52')에 의해 일부가 엔진(5')에 분사되고, 연소되지 않은 연료는 연료회수라인(R')을 통해 다시 봄베(2')로 회수된다.Therefore, after the fuel supplied through the fuel pump 4 'passes through the fuel supply line S', a part of the fuel is injected into the engine 5 'by the injector 52', and the unburned fuel is recovered. It is withdrawn to the cylinder 2 'via line R'.

또한, 상기 압력조절기(9')는 내부에 구비된 다이어프램과 스프링의 균형을 이용하여, 엔진(5')에서 회수된 연료의 압력을 감압시켜 봄베(2')로 회수되도록 한다.In addition, the pressure regulator 9 'is used to balance the diaphragm and the spring provided therein, so as to reduce the pressure of the fuel recovered from the engine 5' to be recovered to the cylinder 2 '.

따라서 상기 압력조절기(9')는 봄베(2')에서 송출되어 연료펌프(4')를 통해 엔진으로 공급되는 연료공급라인(S')의 압력과 상기 압력조절기(9')에서 봄베(2')로 연결되는 연료회수라인(R')의 압력차이가 항상 5bar 로 유지되도록 하는 기능을 한다. Therefore, the pressure regulator 9 'is discharged from the cylinder 2' and the pressure of the fuel supply line S 'supplied to the engine through the fuel pump 4' and the cylinder 2 from the pressure regulator 9 '. Pressure difference between the fuel recovery line (R ') connected to') is always maintained at 5bar.

한편 상기 멀티밸브(3')와 연료펌프(4') 사이의 연료공급라인(S')에는 벤츄리효과에 의해 가속된 연료가 연료펌프(4')에 유입되도록 제트밸브(6')이 설치된 다.Meanwhile, in the fuel supply line S 'between the multi-valve 3' and the fuel pump 4 ', a jet valve 6' is installed so that fuel accelerated by the venturi effect flows into the fuel pump 4 '. All.

상기 제트밸브(6')은 상부 일측에는 연료공급라인(S')이 연결되고, 하부에는 연료펌프(4')가 연결된 것으로, 연료펌프(4')의 토출측과 연결된 바이패스라인(VP')이 제트밸브(6')의 내부에 형성된 노즐과 통하도록 결합된다.The jet valve 6 'is connected to a fuel supply line S' on one side of the jet valve 6, and a fuel pump 4 'is connected to a lower part of the jet valve 6', and has a bypass line VP 'connected to the discharge side of the fuel pump 4'. ) Is coupled to communicate with a nozzle formed inside the jet valve 6 '.

따라서 연료펌프(4')에서 토출된 연료 중 일부가 바이패스라인(VP')을 통해 제트밸브(6')로 유입되어 배압을 형성함으로써 벤츄리 효과가 발생되고, 이로 인해 봄베(2') 내의 연료가 가속되어 연료펌프(4')로 공급될 수 있어 펌핑효율이 향상될 수 있다. Therefore, a part of the fuel discharged from the fuel pump 4 'is introduced into the jet valve 6' through the bypass line VP 'to form a back pressure, thereby generating a venturi effect, which causes the inside of the bomb 2'. The fuel may be accelerated and supplied to the fuel pump 4 'so that the pumping efficiency may be improved.

그러나 상기한 종래 기술은 연료펌프(4')에서 분사된 연료 중 일부를 바이패스라인(VP')을 통해 제트노즐(6')의 압력발생원으로 사용하여야 하므로 연료펌프(4')의 용량이 커져야 하는 문제점이 있다.However, the above-described conventional technique requires that some of the fuel injected from the fuel pump 4 'be used as a pressure source of the jet nozzle 6' through the bypass line VP ', so that the capacity of the fuel pump 4' is increased. There is a problem that must be large.

즉, 연료펌프(4')에서 엔진(5')으로 공급되는 연료공급라인(S')의 압력은 통상 6 bar를 유지해야 하는데 연료펌프(4')에서 분사된 연료 중 일부가 바이패스라인(VP')으로 다시 빠져나가므로 그 나머지의 분사량으로 6 bar의 압력을 유지하려면 연료펌프(4')의 용량을 증가시킬 수 밖에 없는 것이다.That is, the pressure of the fuel supply line S 'supplied from the fuel pump 4' to the engine 5 'should normally be maintained at 6 bar. Some of the fuel injected from the fuel pump 4' is bypassed. (VP '), so the remaining injection amount to maintain the pressure of 6 bar is to increase the capacity of the fuel pump (4').

따라서 이를 해결하고자 본 출원인은 제트노즐(6')를 봄베(2') 내에 설치하고, 제트노즐(6')의 노즐로 유입되는 압력발생원으로서 연료회수라인(R')으로부터 유입되는 연료를 이용하였다.Therefore, in order to solve this problem, the applicant installs the jet nozzle 6 'in the cylinder 2' and uses the fuel flowing from the fuel recovery line R 'as a pressure generating source flowing into the nozzle of the jet nozzle 6'. It was.

그런데 이 경우 노즐의 분사공이 협소하여 분사량이 현저히 감소됨으로 인해 연료회수라인(R')의 압력이 상승하는 현상, 즉 부압이 발생되는 문제점이 발생되었 다.However, in this case, since the injection hole of the nozzle is narrowed and the injection amount is significantly reduced, a phenomenon in which the pressure of the fuel recovery line R 'rises, that is, a negative pressure is generated.

따라서 연료회수라인(R')에 부압이 형성되면 압력조절기(9')에 무리를 주게 되어 전체적인 시스템에 고장이 발생되는 문제점이 야기될 우려가 있다.Therefore, when a negative pressure is formed in the fuel recovery line R ', the pressure regulator 9' may be exerted, which may cause a problem that a failure occurs in the entire system.

본 발명은 상기한 종래 기술의 문제점을 해소하기 위해 안출된 것으로, 제트노즐을 봄베 내에 설치하여 연료 펌프의 유량을 증대시키되, 연료회수라인에 과도한 부압이 형성될 경우를 대비하여 제트노즐에 벤트장치를 형성함으로써 부압을 배출시켜 압력이 방출되도록 한 가스차량용 엘피아이 시스템을 제공하는데 그 목적이 있다.The present invention has been made in order to solve the above problems of the prior art, the jet nozzle is installed in the cylinder to increase the flow rate of the fuel pump, in case the excessive negative pressure is formed in the fuel recovery line vent device in the jet nozzle The purpose of the present invention is to provide a gas vehicle elpia system in which a negative pressure is discharged to release the pressure by forming a.

상기한 본 발명의 목적은 가스 연료가 저장되는 봄베; 상기 봄베에 설치된 멀티밸브; 상기 멀티밸브와 연결되며 봄베 내에 저장된 가스 연료를 펌핑하여 송출하는 연료펌프; 상기 연료펌프를 통해 공급되는 액상의 연료가 인젝터를 통해 분사되어 구동되는 엔진; 상기 봄베 내에 설치되며 상기 멀티밸브 및 연료펌프로 연료를 공급하는 제트노즐로 구성된 가스차량용 엘피아이 시스템에 있어서, 상기 제트노즐은 상기 연료가 유입되도록 일측 상부에 형성된 유입구; 상기 유입구를 통해 유입된 연료가 배출되며 상기 멀티밸브와 연결되는 관이 결합되는 배출구; 상기 배 출구의 내부에 선단이 뾰족하게 형성된 노즐; 상기 노즐의 후방 측면에 통하도록 형성되며 연료회수라인이 연결되는 연결구; 및 상기 노즐의 상부에 통하는 통공, 상기 통공에 통하도록 상부에 형성된 안착홈, 상기 안착홈에 삽입되어 상기 통공을 막는 패킹, 상기 안착홈에 삽입되며 하단이 패킹에 지지되고 상단이 안착홈을 막는 뚜껑에 지지되어 탄성력을 발휘하는 스프링, 상기 안착홈으로부터 외부로 통하도록 형성된 배기공을 갖는 벤트부를 포함하여 구성된다.An object of the present invention described above is a bomb in which a gaseous fuel is stored; A multi-valve installed in the cylinder; A fuel pump connected to the multi-valve and pumping gas fuel stored in a bomb; An engine driven by injecting liquid fuel supplied through the fuel pump through an injector; An elpia system for a gas vehicle comprising a jet nozzle for supplying fuel to the multi-valve and a fuel pump, the jet nozzle comprising: an inlet formed at an upper portion of one side such that the fuel is introduced; A discharge port through which the fuel introduced through the inlet is discharged and the pipe connected to the multi-valve is coupled; A nozzle in which a tip is pointed inside the ship outlet; A connector configured to communicate with a rear side of the nozzle and to which a fuel recovery line is connected; And a through hole through the top of the nozzle, a seating groove formed in the upper part to communicate with the through hole, a packing inserted into the seating groove to block the through hole, a hole inserted into the seating groove, and having a lower end supported by the packing and an upper end blocking the seating groove. And a vent portion having a spring supported by the lid to exert an elastic force and an exhaust hole formed to communicate with the outside from the seating groove.

본 발명에 따르면 봄베 내에 설치된 제트노즐에 벤트부가 형성됨으로써 연료회수관의 부압 형성을 해소할 수 있어 압력조절기의 손상을 방지할 수 있는 효과가 있다.According to the present invention, by forming a vent part in the jet nozzle installed in the cylinder, the negative pressure of the fuel recovery pipe can be eliminated, thereby preventing damage to the pressure regulator.

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

하기의 본 발명에 대한 실시예를 설명함에 있어 상술한 종래 기술에서 언급한 엘피아이 시스템의 전반적인 구성요소는 동일하게 적용되므로 공통되는 구성에 대한 부호는 동일하게 사용하기로 한다.In the following description of embodiments of the present invention, since the general components of the Elpia system mentioned in the above-described prior art are applied in the same manner, the symbols for the common components will be used the same.

도 2는 본 발명에 따른 가스차량용 엘피아이 시스템에 대한 구성도이고, 도 3은 본 발명에 따른 가스차량용 엘피아이 시스템에서 '제트노즐'를 확대한 단면도이다.2 is a configuration diagram of the gas vehicle Elpia system according to the present invention, Figure 3 is an enlarged cross-sectional view of the 'jet nozzle' in the gas vehicle Elpia system according to the present invention.

도 2에 나타낸 바와 같이, 본 발명에 따른 가스차량용 엘피아이 시스템(M)은,As shown in Figure 2, the gas vehicle lpai system M according to the present invention,

가스 연료가 저장되는 봄베(2);A cylinder 2 in which gaseous fuel is stored;

상기 봄베(2)에 설치된 멀티밸브(3);A multi-valve (3) installed in the cylinder (2);

상기 멀티밸브(3)와 연결되며 봄베(2) 내에 저장된 가스 연료를 펌핑하여 송출하는 연료펌프(4);A fuel pump (4) connected to the multi-valve (3) and pumping out gas fuel stored in the cylinder (2);

상기 연료펌프(4)를 통해 공급되는 액상의 연료가 인젝터(52)를 통해 분사되어 구동되는 엔진(5);An engine (5) driven by injecting liquid fuel supplied through the fuel pump (4) through an injector (52);

상기 봄베(2) 내에 설치되며 상기 멀티밸브(3)를 경유하여 연료펌프(4)로 연료를 공급하는 제트노즐(6)를 포함하여 구성된다.It is installed in the cylinder (2) and comprises a jet nozzle (6) for supplying fuel to the fuel pump (4) via the multi-valve (3).

특히 상기 제트노즐(6)은 도 3에 나타낸 바와 같이, In particular, the jet nozzle 6 is shown in Figure 3,

봄베(2)의 연료가 유입되도록 일측 상부에 유입구(61)가 형성되며, 상기 유입구(61)를 통해 유입된 연료가 배출되도록 배출구(62)가 형성된다.An inlet 61 is formed at an upper portion of one side of the cylinder 2 to allow fuel to flow therein, and an outlet 62 is formed to discharge fuel introduced through the inlet 61.

상기 배출구(62)에는 멀티밸브(3)와 연결되는 관(S-1)이 결합된다. The outlet 62 is coupled to the pipe (S-1) connected to the multi-valve (3).

또한 상기 제트노즐(6)의 내부에는 상기 배출구(62)와 통하도록 노즐(63)이 형성되는데, 상기 노즐(63)의 상부 일측에 연료회수라인(R)과 연결되는 연결구(64)가 형성된다.In addition, a nozzle 63 is formed inside the jet nozzle 6 so as to communicate with the outlet 62. A connector 64 connected to the fuel recovery line R is formed at an upper side of the nozzle 63. do.

그리고 상기 노즐(63)과 통하도록 그 상부에 벤트부(V)가 형성된다.And the vent portion (V) is formed on the upper portion so as to communicate with the nozzle (63).

상기 벤트부(V)는 The vent part V is

상기 노즐(63)의 상부 통공(V1)에 통하도록 형성된 안착홈(V2), Seating groove (V2) formed to pass through the upper through hole (V1) of the nozzle 63,

상기 안착홈(V2)에 삽입되어 상기 통공(V1)을 밀폐하는 패킹(V3), Packing (V3) is inserted into the seating groove (V2) to seal the through-hole (V1),

상기 안착홈(V2)에 삽입되며 하단이 패킹(V3)에 지지되고 상단이 안착홈(V2)을 막는 뚜껑(V6)에 지지되어 탄성력을 발휘하는 스프링(V4), Spring (V4) is inserted into the seating groove (V2) and the lower end is supported by the packing (V3) and the upper end is supported by the lid (V6) blocking the seating groove (V2),

상기 안착홈(V2)에 통하도록 일측에 형성된 배기공(V5)을 포함하여 이루어진다. It includes an exhaust hole (V5) formed on one side to pass through the seating groove (V2).

상기 노즐(63)은 배출구(62)를 향해 직경이 작아도록 한 콘(corn)형상이며 그 끝단에 노즐공(630)이 형성된다.The nozzle 63 has a cone shape such that the diameter thereof is smaller toward the discharge port 62, and a nozzle hole 630 is formed at the end thereof.

또한 상기 제트노즐(6)에는 내부에 상기 유입구(61)와 통하는 수평통로(65)가 형성되고, 상기 수평통로(65)와 상기 배출구(62)에 통하고 상기 노즐(63)의 선단이 위치되는 공간부(66)가 형성되며, 상기 공간부(66)에서 배출구(62)에 연결되는 부위의 내벽은 원추형으로 경사면(67)이 형성된다.In addition, the jet nozzle 6 is formed with a horizontal passage 65 communicating with the inlet 61 therein, the front end of the nozzle 63 through the horizontal passage 65 and the discharge port 62 is located The space portion 66 is formed, and the inner wall of the portion connected to the outlet 62 in the space portion 66 has a conical inclined surface 67 is formed.

상기 노즐(63)의 외주면과 상기 공간부(66) 사이에 연료가 통과되도록 틈새(68)가 형성된다.A gap 68 is formed between the outer circumferential surface of the nozzle 63 and the space 66 to allow fuel to pass.

이하 본 발명의 작용을 설명하기로 한다.Hereinafter, the operation of the present invention will be described.

봄베(10) 내의 연료가 제트노즐(6)의 유입구(61)를 통해 유입되는 한편, 연료회수라인(R)으로부터 회수된 연료가 유입되어 노즐(63)을 통해 분사되면, 노즐(63)의 노즐공(630)과 틈새(68)에서 벤츄리 효과가 발생되므로 유속이 증가되어 배출구(62)를 통해 연료가 송출된다.When the fuel in the cylinder 10 is introduced through the inlet 61 of the jet nozzle 6, while the fuel recovered from the fuel recovery line R is introduced and injected through the nozzle 63, Since the venturi effect occurs in the nozzle hole 630 and the gap 68, the flow rate is increased, and fuel is discharged through the outlet 62.

이렇게 배출구(62)를 통해 송출된 연료는 멀티밸브(3)를 경유하여 연료펌프(4)로 유입된다.The fuel sent out through the outlet 62 is introduced into the fuel pump 4 via the multi-valve 3.

따라서 연료펌프(4)는 이미 1차로 제트노즐(6)를 통과하면서 가속된 연료를 공급라인(S)으로 토출시키는 것이므로 그 펌핑용량이 작더라도 충분한 유속을 갖게 된다.Therefore, since the fuel pump 4 discharges the fuel accelerated to the supply line S while passing through the jet nozzle 6 firstly, the fuel pump 4 has a sufficient flow rate even if its pumping capacity is small.

한편, 연료회수라인(R)에 과도한 고압상태가 형성될 경우 고압의 연료가 연결구(64)를 통해 제트노즐(6)로 유입되면, 연료의 미는 힘에 의해 패킹(V3)이 상승되고, 스프링(V4)이 압축되어 통공(V1)이 개방됨으로써 고압의 연료가 통공(V1)을 통해 안착홈(V2)으로 유입된 후 배기공(V5)을 통해 외부로 배출된다. On the other hand, if excessive high pressure is formed in the fuel recovery line (R), when the high-pressure fuel flows into the jet nozzle 6 through the connector 64, the packing (V3) is raised by the pushing force of the fuel, the spring As V4 is compressed and the through hole V1 is opened, high-pressure fuel is introduced into the seating groove V2 through the through hole V1 and then discharged to the outside through the exhaust hole V5.

상기 외부로 배출된 연료는 봄베(2) 내에 저장된다. The fuel discharged to the outside is stored in the cylinder 2.

이렇게 연료회수라인(R)에 차있던 연료의 일부가 벤트부(V)를 통해 봄베(2)로 배출됨으로써 연료회수라인(R)의 고압상태가 해소될 수 있다.Thus, a part of the fuel filled in the fuel recovery line (R) is discharged to the cylinder (2) through the vent (V) can be solved the high pressure state of the fuel recovery line (R).

비록 본 발명이 상기 언급된 바람직한 실시예와 관련하여 설명되어졌지만, 발명의 요지와 범위로부터 벗어남이 없이 다양한 수정 및 변형이 가능한 것은 당업 자라면 용이하게 인식할 수 있을 것이며, 이러한 변경 및 수정은 모두 첨부된 청구의 범위에 속함은 자명하다.Although the present invention has been described in connection with the above-mentioned preferred embodiments, it will be readily apparent to those skilled in the art that various modifications and variations are possible without departing from the spirit and scope of the invention, and all such changes and modifications are It is obvious that it belongs to the appended claims.

도 1은 종래의 엘피아이 시스템을 나타낸 도면.1 is a diagram showing a conventional ELPIA system.

도 2는 본 발명에 따른 가스차량용 엘피아이 시스템에 대한 구성도. Figure 2 is a block diagram of the gas pump elf system according to the present invention.

도 3은 본 발명에 따른 가스차량용 엘피아이 시스템에서 '제트노즐'를 확대한 단면도.Figure 3 is an enlarged cross-sectional view of the 'jet nozzle' in the gas vehicle Elpia system according to the present invention.

* 도면의 주요 부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings

2 : 봄베 3 : 멀티밸브2: cylinder 3: multi-valve

4 : 연료펌프 5 : 엔진4: fuel pump 5: engine

6 : 제트노즐 7 : 연료필터6: jet nozzle 7: fuel filter

61 : 유입구 62 : 배출구61 inlet port 62 outlet

63 : 노즐 64 : 연결구63: nozzle 64: connector

V : 벤트부 V1 : 통공V: vent part V1: through hole

V2 : 안착홈 V3 : 패킹V2: Seating groove V3: Packing

V4 : 스프링 V5 : 배기공V4: Spring V5: Exhaust Hole

Claims (5)

가스 연료가 저장되는 봄베(2); 상기 봄베(2)에 설치된 멀티밸브(3); 상기 멀티밸브(3)와 연결되며 봄베(2) 내에 저장된 가스 연료를 펌핑하여 송출하는 연료펌프(4); 상기 연료펌프를 통해 공급되는 액상의 연료가 인젝터를 통해 분사되어 구동되는 엔진(5); 상기 봄베(2) 내에 설치되며 상기 멀티밸브(3) 및 연료펌프(4)로 연료를 공급하는 제트노즐(6)를 포함하며, A cylinder 2 in which gaseous fuel is stored; A multi-valve (3) installed in the cylinder (2); A fuel pump (4) connected to the multi-valve (3) and pumping out gas fuel stored in the cylinder (2); An engine (5) driven by injecting liquid fuel supplied through the fuel pump through an injector; Installed in the cylinder (2) and includes a jet nozzle (6) for supplying fuel to the multi-valve (3) and the fuel pump (4), 상기 제트노즐(6)에는 연료회수라인에 과도한 부압이 형성될 경우 압력을 방출시키기 위해 벤트부(V)가 형성된 것을 특징으로 하는 가스차량용 엘피아이 시스템.The jet nozzle (6) Elpiai system for a gas vehicle, characterized in that the vent portion (V) is formed to release the pressure when excessive negative pressure is formed in the fuel recovery line. 제 1항에 있어서,The method of claim 1, 상기 제트노즐(6)은 The jet nozzle 6 is 상기 봄베(2)의 연료가 유입되도록 일측 상부에 형성된 유입구(61);An inlet 61 formed at an upper portion of one of the cylinders 2 so as to introduce fuel; 상기 유입구(61)를 통해 유입된 연료가 배출되도록 형성된 배출구(62);An outlet 62 formed to discharge fuel introduced through the inlet 61; 상기 배출구(62)와 통하도록 내부에 형성된 노즐(63);A nozzle 63 formed therein so as to communicate with the outlet 62; 상기 노즐(63)의 상부 일측에 연료회수라인(R)과 연결되도록 형성된 연결구(64)Connector 64 formed to be connected to the fuel recovery line (R) on the upper side of the nozzle (63) 를 포함하는 것을 특징으로 하는 가스차량용 엘피아이 시스템.Elpia system for a gas vehicle comprising a. 제 1항에 있어서,The method of claim 1, 상기 벤트부(V)는 The vent part V is 상기 제트노즐(6)에 형성된 통공(V1)과 통하도록 형성된 안착홈(V2);A seating groove (V2) formed to communicate with a through hole (V1) formed in the jet nozzle (6); 상기 안착홈(V2)에 삽입되어 상기 통공(V1)을 밀폐하는 패킹(V3);A packing (V3) inserted into the seating groove (V2) to seal the through hole (V1); 상기 안착홈(V2)에 삽입되며 하단이 패킹(V3)에 지지되고 상단이 안착홈(V2)을 막는 뚜껑(V6)에 지지되어 탄성력을 발휘하는 스프링(V4); A spring (V4) inserted into the seating groove (V2) and having a lower end supported by the packing (V3) and an upper end supported by a lid (V6) blocking the seating groove (V2); 상기 안착홈(V2)에 통하도록 일측에 형성된 배기공(V5)Exhaust hole (V5) formed on one side to pass through the seating groove (V2) 을 포함하는 것을 특징으로 하는 가스차량용 엘피아이 시스템.Elpia system for a gas vehicle comprising a. 제 2항에 있어서,3. The method of claim 2, 상기 노즐(63)은 배출구(62)를 향해 직경이 작아도록 한 콘 형상이며 그 끝단에 노즐공(630)이 형성된 것을 특징으로 하는 가스차량용 엘피아이 시스템.The nozzle (63) is an elliptical system for a gas vehicle, characterized in that the cone-shaped so that the diameter toward the outlet 62 is small and the nozzle hole 630 is formed at the end thereof. 제 1항에 있어서,The method of claim 1, 상기 제트노즐(6)에는 The jet nozzle 6 내부에 상기 유입구(61)와 통하는 수평통로(65)와,A horizontal passage 65 communicating with the inlet 61 therein; 상기 수평통로(65)와 상기 배출구(62)에 통하고 상기 노즐(63)의 선단이 위치되는 공간부(66)가 형성되며, The space portion 66 is formed through the horizontal passage 65 and the discharge port 62 and at which the tip of the nozzle 63 is positioned. 상기 공간부(66)에서 배출구(62)에 연결되는 부위의 내벽은 원추형으로 경사면(67)이 형성되고,The inner wall of the portion connected to the outlet 62 in the space 66 is a conical inclined surface 67 is formed, 상기 노즐(63)의 외주면과 상기 공간부(66) 사이에 연료가 통과되도록 틈새(68)가 형성된 것을 특징으로 하는 가스차량용 엘피아이 시스템.Gas gap between the outer circumferential surface of the nozzle (63) and the space portion (66) is formed, the gas vehicle lpai system, characterized in that the gap.
KR1020090073586A 2009-08-11 2009-08-11 LPI system for gas vehicle KR101094882B1 (en)

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CN109624658B (en) * 2017-10-05 2022-04-19 埃贝斯佩歇气候控制系统有限公司 Fuel connection unit
US11358439B2 (en) 2017-10-05 2022-06-14 Eberspächer Climate Control Systems GmbH Fuel connection unit

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