KR19980025713U - LPG Automotive Fuel Control System - Google Patents

LPG Automotive Fuel Control System Download PDF

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Publication number
KR19980025713U
KR19980025713U KR2019960038539U KR19960038539U KR19980025713U KR 19980025713 U KR19980025713 U KR 19980025713U KR 2019960038539 U KR2019960038539 U KR 2019960038539U KR 19960038539 U KR19960038539 U KR 19960038539U KR 19980025713 U KR19980025713 U KR 19980025713U
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KR
South Korea
Prior art keywords
low speed
mixer
supply pipe
petroleum gas
fuel
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Application number
KR2019960038539U
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Korean (ko)
Inventor
이시형
Original Assignee
김영귀
기아자동차 주식회사
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Application filed by 김영귀, 기아자동차 주식회사 filed Critical 김영귀
Priority to KR2019960038539U priority Critical patent/KR19980025713U/en
Publication of KR19980025713U publication Critical patent/KR19980025713U/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D19/00Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/02Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with gaseous fuels
    • F02D19/021Control of components of the fuel supply system
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M21/00Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0203Apparatus 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
    • F02M21/0209Hydrocarbon fuels, e.g. methane or acetylene
    • F02M21/0212Hydrocarbon fuels, e.g. methane or acetylene comprising at least 3 C-Atoms, e.g. liquefied petroleum gas [LPG], propane or butane
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M21/00Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0218Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02M21/023Valves; Pressure or flow regulators in the fuel supply or return system
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00Apparatus 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
    • F02M37/0047Layout or arrangement of systems for feeding fuel

Abstract

본 고안은 종래의 액화석유가스 자동차용 연료 제어 장치에서는 대기압 수준의 연료압력을 이용하여 연료를 믹서에 공급하므로 공전시의 안정성 및 재현성이 좋지 않다는 문제점이 있어서 이를 해결할 목적으로, 베이퍼라이저(40)의 1차실(42)과 믹서(50)를 연결하는 저속용 공급관(70)과, 상기 저속용 공급관(70)에 설치되는 저속용 솔레노이드 밸브(72)를 포함하는 액화석유가스 자동차용 연료 제어 장치를 제공한다.The present invention is a conventional fuel control device for liquefied petroleum gas vehicle because the fuel is supplied to the mixer by using the fuel pressure of the atmospheric pressure level, there is a problem that the stability and reproducibility at idle is not good, the purpose of solving the vaporizer 40 A fuel control device for a liquefied petroleum gas vehicle including a low speed supply pipe (70) connecting the primary chamber (42) and the mixer (50), and a low speed solenoid valve (72) installed in the low speed supply pipe (70). to provide.

Description

액화석유가스(LPG) 자동차용 연료 제어 장치LPG Automotive Fuel Control System

본 고안은 액화석유가스 자동차용 연료 제어 장치에 관한 것으로서, 보다 상세하게는 공전(idle)의 안정성, 재현성을 향상시키고 또한 공연비 제어성을 향상시킬 수 있는 액화석유가스 자동차용 연료 제어 장치에 관한 것이다.The present invention relates to a fuel control device for a liquefied petroleum gas vehicle, and more particularly, to a fuel control device for a liquefied petroleum gas vehicle that can improve idle stability and reproducibility and also improve air-fuel ratio controllability. .

자동차에는 여러 가지 종류가 있으며 그 사용 목적이나 엔진의 종류 또는 차체의 구조나 모양 등에 따라 여러 가지로 분류할 수 있다.There are many types of automobiles, and they can be classified into various types according to their purpose of use, type of engine, or structure or shape of the vehicle body.

자동차를 엔진의 종류에 따라 분류하면 대체로 가솔린 자동차, 디젤 자동차, 가스 터빈 자동차, 전기 자동차 등으로 분류할 수 있으며, 이때 사용되는 연료는 가솔린, 경유, 액화석유가스, 압축천연가스 등이다.When the car is classified according to the type of engine, it is generally classified into a gasoline car, a diesel car, a gas turbine car, an electric car, and the like. The fuel used is gasoline, diesel, liquefied petroleum gas, or compressed natural gas.

현재는 통상 가솔린이나 경유를 사용하는 자동차가 주종이지만 경제성, 대기오염 등의 관점에서 액화석유가스(Liquified Petroleum Gas : LPG)나 압축천연가스(Compressed Natural Gas)를 사용하는 차량이 주목되고 있다.Currently, cars mainly using gasoline or diesel are mainly used, but vehicles using liquefied petroleum gas (LPG) or compressed natural gas (Compressed Natural Gas) are attracting attention from the viewpoint of economics and air pollution.

액화석유가스는 가솔린과 비교하면 착화점은 거의 같지만 저발열량이고 옥탄가가 약간 높으며 가솔린 엔진의 연료로서 매우 적합하다. 또한 가솔린보다 가격이 싸기 때문에 영업용 택시나 소형 트럭 등 영업차의 연료로서 널리 사용되고 있다.Liquefied petroleum gas has almost the same ignition point as gasoline but has a low calorific value, slightly higher octane number and is well suited as a fuel for gasoline engines. In addition, since it is cheaper than gasoline, it is widely used as fuel for commercial vehicles such as commercial taxis and light trucks.

한편 가솔린 자동차와 기구상으로 볼 때 서로 다른 점은 액화석유가스가 상온에서 봄베(bombe)에 액화 충전되어 있으며, 이것이 베이퍼라이저에서 감압 기화되어 믹서에서 공기와 혼합된다는 점이다.The difference between gasoline cars and appliances is that liquefied petroleum gas is liquefied and charged into a bomb at room temperature, which is vaporized under reduced pressure in a vaporizer and mixed with air in a mixer.

종래 액화석유가스 자동차용 연료 제어 장치를 도 1을 참조하여 설명하면 다음과 같다.A conventional fuel control device for liquefied petroleum gas vehicle is described with reference to FIG.

액화석유가스를 저장하는 봄베(10)는 여과기(20)에 연결되며, 상기 여과기(20)는 전자밸브(30)를 통하여 베이퍼라이저(40)에 연결된다.Bomb 10 for storing the liquefied petroleum gas is connected to the filter 20, the filter 20 is connected to the vaporizer 40 through the solenoid valve (30).

그리고 상기 베이퍼라이저(40)는 믹서(50)에 연결되고, 상기 믹서(50)가 기관(60)과 연결되어 석유가스와 공기의 혼합기를 상기 기관(60)에 공급하게 된다.The vaporizer 40 is connected to the mixer 50, and the mixer 50 is connected to the engine 60 to supply a mixer of petroleum gas and air to the engine 60.

상기 베이퍼라이저(40)와 상기 믹서(50) 부분을 도 2를 참조하여 상세히 설명하면 다음과 같다.The vaporizer 40 and the mixer 50 will be described in detail with reference to FIG. 2 as follows.

베이퍼라이저(40)는 1차실(42)과 2차실(44)로 이루어지며, 상기 2차실(44)의 출구관 즉 주공급관(43)은 믹서(50)의 벤튜리부(52)에 연결되며, 또한 상기 주공급관(43)에는 분기관(45)이 형성된다.The vaporizer 40 is composed of a primary chamber 42 and a secondary chamber 44, the outlet pipe of the secondary chamber 44, that is, the main supply pipe 43 is connected to the venturi portion 52 of the mixer 50, In addition, the main supply pipe 43 is formed with a branch pipe (45).

그리고 상기 주공급관(43)에는 메인조정나사(46)가 설치되며, 상기 분기관(45)에는 솔레노이드 밸브(48)가 설치된다.In addition, a main adjustment screw 46 is installed in the main supply pipe 43, and a solenoid valve 48 is installed in the branch pipe 45.

한편 상기 믹서(50)의 출구부분에는 바이패스관(54)이 형성되며, 내부 통로에는 스로틀 밸브(56)가 설치된다.Meanwhile, the bypass pipe 54 is formed at the outlet of the mixer 50, and the throttle valve 56 is installed at the inner passage.

종래 액화석유가스 자동차용 연료 제어 장치의 작용을 도 1을 참조하여 설명하면 다음과 같다.Referring to Figure 1 the operation of the conventional liquefied petroleum gas vehicle fuel control device will be described.

봄베(10) 내의 액체상태의 액화석유가스는 상기 봄베(10)내의 압력에 의하여 여과기(20)와 전자밸브(30)를 거쳐서 베이퍼라이저(40)까지 공급된다.The liquid liquefied petroleum gas in the cylinder 10 is supplied to the vaporizer 40 via the filter 20 and the solenoid valve 30 by the pressure in the cylinder 10.

그리고 상기 베이퍼라이저(40)에서 연료는 기화되어 믹서(50)에 공급되어 공기와 혼합되고, 결국 혼합기가 기관(60)에 공급된다.In the vaporizer 40, fuel is vaporized and supplied to the mixer 50 to be mixed with air, and eventually, the mixer is supplied to the engine 60.

도 2를 참조하며 상세히 설명하면, 고압 액상의 연료를 상기 베이퍼라이저(40)의 1차실(42)에서 감압시킨 후, 2차실(44)에서 대기압수준으로 감압하고, 이러한 상태의 석유가스를 믹서(50)의 벤추리부에 공급하며, 상기 믹서(50)에서 석유가스와 공기가 혼합된다.Referring to FIG. 2, the high-pressure liquid fuel is reduced in the primary chamber 42 of the vaporizer 40, and then reduced in the secondary chamber 44 to atmospheric pressure, and the petroleum gas in this state is mixed with the mixer ( 50 is supplied to the venturi part, and the petroleum gas and air are mixed in the mixer 50.

한편 공전시는에는 스로틀 밸브(56)가 거의 닫힌 상태에서 혼합기는 바이패스관(54)으로 바이패스되어 엔진에 공급된다.On the other hand, during idle, the mixer is bypassed to the bypass pipe 54 and supplied to the engine while the throttle valve 56 is almost closed.

그러나 앞에서 설명한 종래의 액화석유가스 자동차용 연료 제어 장치에서는 대기압 수준의 연료압력을 이용하여 연료를 믹서에 공급하므로 공전시의 안정성 및 재현성이 좋지 않다는 문제점이 있었다.However, the conventional fuel control device for the liquefied petroleum gas vehicle described above has a problem in that the fuel is supplied to the mixer using the fuel pressure at atmospheric pressure, so that stability and reproducibility at idle are not good.

본 고안은 상기와 같은 문제점을 해결하기 위하여 안출된 것으로서 본 고안의 목적은 공전시 안정성 및 재현성을 좋게하고 또한 공연비 제어성을 향상시킨 액화석유가스 자동차용 연료 제어 장치를 제공하는 데 있다.The present invention was devised to solve the above problems, and an object of the present invention is to provide a fuel control device for liquefied petroleum gas automobile which improves stability and reproducibility at idle and also improves air-fuel ratio controllability.

도 1은 일반적인 액화석유가스 자동차의 연료계통을 나타낸 블록도이고,1 is a block diagram showing a fuel system of a typical liquefied petroleum gas vehicle,

도 2는 종래의 액화석유가스 자동차용 연료 제어 장치를 개략적으로 나타낸 구성도이고,Figure 2 is a schematic view showing a conventional fuel control device for liquefied petroleum gas vehicle,

도 3은 본 고안에 따른 액화석유가스 자동차용 연료 제어 장치를 개략적으로 나타낸 구성도이다.Figure 3 is a schematic view showing a fuel control device for a liquefied petroleum gas vehicle according to the present invention.

(도면의 주요 부분에 대한 부호 설명)(Symbol description for main parts of drawing)

40 : 베이퍼라이저 42 : 1차실40: Vaporizer 42: Primary room

43 : 주공급관 44 : 2차실43: main supply pipe 44: secondary room

45 : 분기관 46 : 메인조정나사45: branch pipe 46: main adjustment screw

48 : 솔레노이드 밸브 50 : 믹서(mixer)48: solenoid valve 50: mixer

52 : 벤튜리부 54 : 바이패스관52: venturi part 54: bypass tube

56 : 스로틀 밸브 70 : 저속용 공급관56 throttle valve 70 supply pipe for low speed

72 : 저속용 솔레노이드 벨브72: low speed solenoid valve

상기 목적을 달성하기 위한 본 고안의 구성을 설명하면 다음과 같다.Referring to the configuration of the present invention for achieving the above object is as follows.

본 고안의 특징은 베이퍼라이저의 1차실과 믹서 사이에 저속용 공급관을 신설하여 1차실 높은 압력을 이용하여 아이들 및 부분부하시에 연료를 공급하는데 있다.A feature of the present invention is to supply fuel to the children and the partial load by using a high pressure in the primary chamber by establishing a low speed supply pipe between the primary chamber and the mixer of the vaporizer.

즉 본 고안에 따른 액화석유가스 자동차용 연료 제어 장치는 베이퍼라이저의 1차실과 믹서를 연결하는 저속용 공급관과, 상기 저속용 공급관에 설치되는 저속용 솔레노이드 밸브를 포함하여 이루어진다.That is, the fuel control device for a liquefied petroleum gas vehicle according to the present invention includes a low speed supply pipe connecting a primary chamber of a vaporizer and a mixer, and a low speed solenoid valve installed in the low speed supply pipe.

따라서 본 고안에서는 주공급관과 저속용 공급관에 흐르는 연료의 양을 적절히 제어함으로써 아이들시 안정성 및 재현성을 향상시킬 수 있게 된다.Therefore, the present invention can improve the stability and reproducibility during idling by appropriately controlling the amount of fuel flowing through the main supply pipe and the low speed supply pipe.

이하 상기의 목적을 구체적으로 실현할 수 있는 본 고안의 바람직한 실시예를 첨부한 도면를 참조하여 설명한다.Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention that can specifically realize the above object.

본 실시예에서 종래기술과 동일한 구성은 동일 명칭 및 동일 부호를 병기하며 그에 대한 설명은 생략한다.In the present embodiment, the same configuration as the prior art has the same name and the same reference numerals and description thereof will be omitted.

도 3는 본 고안이 적용되는 실시예를 도시한 구성도로서 이를 참조하여 본 고안에 따른 액화석유가스 자동차용 연료 제어 장치를 설명하면 다음과 같다.3 is a configuration diagram showing an embodiment to which the present invention is applied, referring to the fuel control device for a liquefied petroleum gas vehicle according to the present invention with reference to the following.

베이퍼라이저(40)의 1차실(42)과 믹서 사이에는 저속용 공급관(70)이 연결되며, 상기 저속용 공급관(70)에는 저속용 솔레노이드 밸브(72)가 설치된다.A low speed supply pipe 70 is connected between the primary chamber 42 of the vaporizer 40 and the mixer, and a low speed solenoid valve 72 is installed in the low speed supply pipe 70.

그리고 상기 저속용 공급관(70)은 믹서(50)에 형성된 바이패스관(54)에 연결되는 것이 바람직하다.And the low speed supply pipe 70 is preferably connected to the bypass pipe 54 formed in the mixer 50.

상기에서 설명한 본 고안에 따른 실시예의 작용을 도 3을 참조하여 설명하면 다음과 같다.Referring to Figure 3 illustrates the operation of the embodiment according to the present invention as described above.

주공급관(43)에 설치된 솔레노이드 밸브(48*와 저속용 공급관(70)에서 설치된 저속용 솔레노이드 밸브(72)를 적절히 제어함으로써 여러 부하 상태에서 최적의 공연비를 얻을 수 있다.By properly controlling the solenoid valve 48 * provided in the main supply pipe 43 and the low speed solenoid valve 72 provided in the low speed supply pipe 70, an optimum air-fuel ratio can be obtained under various load conditions.

특히 아이들 및 부분부하시에 저속용 공급관(70)은 1차실(42)의 압력을 이용하므로 더욱 효율적으로 공연비를 피드백 제어할 수 있게 된다.In particular, since the low-speed supply pipe 70 uses the pressure of the primary chamber 42 at the idle and the partial load, the air-fuel ratio can be feedback-controlled more efficiently.

상기에서 설명한 본 고안에 따른 실시예의 효과를 설명하면 다음과 같다.Referring to the effects of the embodiment according to the present invention described above are as follows.

위에서 설명한 본 고안에 의하면, 주공급관과 저속용 공급관에 흐르는 연료의 양을 적절히 제어함으로써 최적의 공연비를 얻을 수 있고, 특히 아이들시 안정성 및 재현성을 향상시킬 수 있다는 잇점이 있다.According to the present invention described above, the optimum air-fuel ratio can be obtained by appropriately controlling the amount of fuel flowing through the main supply pipe and the low speed supply pipe, and in particular, the stability and reproducibility during idling can be improved.

상기에서 본 고안은 하나의 실시예만을 설명하였으나, 첨부된 청구범위에서 알 수 있는 바와 같이 본 고안이 속한 분야의 통상의 지식을 가진자는 본 고안의 정신을 벗어나지 않고 변형이 가능하고 이러한 변형은 본 고안의 범위에 속한다는 것을 이해할 것이다.In the above description of the present invention has been described only one embodiment, as can be seen in the appended claims, those skilled in the art to which the present invention belongs can be modified without departing from the spirit of the present invention and such modifications I will understand that it belongs to the scope of the invention.

Claims (1)

베이퍼라이저(40)의 1차실(42)과 믹서(50)를 연결하는 저속용 공급관(70)과;A low speed supply pipe 70 connecting the primary chamber 42 of the vaporizer 40 and the mixer 50; 상기 저속용 공급관(70)에 설치되는 저속용 솔레노이드 밸브(72)를 포함하는 액화석유가스 자동차용 연료 제어 장치.A fuel control device for a liquefied petroleum gas vehicle including a low speed solenoid valve (72) installed in the low speed supply pipe (70).
KR2019960038539U 1996-11-05 1996-11-05 LPG Automotive Fuel Control System KR19980025713U (en)

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