KR100309142B1 - Fuel supply control device for liquefied petroleum gas vehicle - Google Patents
Fuel supply control device for liquefied petroleum gas vehicle Download PDFInfo
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- KR100309142B1 KR100309142B1 KR1019980058268A KR19980058268A KR100309142B1 KR 100309142 B1 KR100309142 B1 KR 100309142B1 KR 1019980058268 A KR1019980058268 A KR 1019980058268A KR 19980058268 A KR19980058268 A KR 19980058268A KR 100309142 B1 KR100309142 B1 KR 100309142B1
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- fuel
- solenoid valve
- pressure reducing
- vaporizer
- supply
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K28/00—Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions
- B60K28/10—Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions responsive to conditions relating to the vehicle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K15/03006—Gas tanks
- B60K2015/03013—Control systems for LPG tanks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2300/00—Purposes or special features of road vehicle drive control systems
- B60Y2300/18—Propelling the vehicle
- B60Y2300/18008—Propelling the vehicle related to particular drive situations
- B60Y2300/1805—Propelling the vehicle related to particular drive situations at stand still, e.g. engine in idling state
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2306/00—Other features of vehicle sub-units
- B60Y2306/13—Failsafe arrangements
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/25—Pc structure of the system
- G05B2219/25308—Ecu, standard processor connects to asic connected to specific application
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- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
본 발명은 LPG 차량의 연료공급장치에 관한 것으로, 산소센서(16)에 의해 검출되는 차량의 배기가스중의 산소농도에 대한 신호를 입력받아 전자제어유니트(17)에 의해 연료 공급량을 이론 공연비에 적합하게 하도록 제어되는 메인 솔레노이드밸브(19)로 베이퍼라이저(7)의 2차 감압실의 연료를 벤튜리(20)와 바이패스 제트(21)로 연료를 공급하도록 된 것에 있어서, 상기 메인 솔레노이드밸브(19)에 의한 2차 감압실(12) 연료의 공급과 더불어 전자제어유니트(17)의 제어하에 베이퍼라이저(10)의 1차 감압실(11)의 연료를 보조 솔레노이드밸브(22)가 제공된 분기관(23)을 통해 스로틀밸브(24)와 벤튜리(20) 사이에 공급하여 아이들링운전시의 이론 공연비를 맞추도록 구성된 것을 특징으로 한 구성에 의해 제어가능한 공연비 폭을 크게 증대시킬 수 있게 되어 간편하게 아이들링 운전의 안정성을 구현할 수 있는 장점이 있다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel supply device for an LPG vehicle, and receives a signal of oxygen concentration in exhaust gas of a vehicle detected by the oxygen sensor 16 and supplies the fuel supply amount to the theoretical air-fuel ratio by the electronic control unit 17. The main solenoid valve 19 is configured to supply fuel to the venturi 20 and the bypass jet 21 with fuel from the secondary pressure reducing chamber of the vaporizer 7 to the main solenoid valve 19 controlled to be suitable. The branch pipe provided with the auxiliary solenoid valve 22 for supplying the fuel to the secondary pressure reducing chamber 12 and the fuel for the primary pressure reducing chamber 11 of the vaporizer 10 under the control of the electronic control unit 17 together with the supply of the fuel to the secondary pressure reducing chamber 12. It is possible to greatly increase the controllable air-fuel ratio width by the configuration, which is configured to supply between the throttle valve 24 and the venturi 20 through 23 to match the theoretical air-fuel ratio during idling operation. There is an advantage that can implement the stability of these ring operation.
Description
본 발명은 액화석유가스(LPG) 차량의 연료공급장치에 관한 것으로, 특히 무부하 운전시 흡기 산소량의 감소에도 안정된 연소가 이루어지도록 산소센서에 의해 검출되는 배기가스중의 산소 농도에 따라 안정된 운전을 할 수 있도록 연료 공급을 제어하도록 된 연료공급장치에 관한 것이다.The present invention relates to a fuel supply device for a liquefied petroleum gas (LPG) vehicle, in particular, stable operation in accordance with the oxygen concentration in the exhaust gas detected by the oxygen sensor to achieve a stable combustion even in the reduction of intake oxygen amount during no load operation. A fuel supply device is configured to control a fuel supply so as to control the fuel supply.
일반적으로 LPG 차량은 가솔린 차량과 비교하여 출력이 다소 떨어지지만 연료비의 저렴, 배기가스에 의한 환경오염문제의 감소 등의 장점으로 널리 사용되고 있으며, LPG 저장용기로 부터 외기의 온도 조건에 따라 액상 또는 기상의 LPG를 여과기와 전자밸브를 통해 베이퍼라이저에서 대기압 정도로의 감압, 기화 및 압력조절되어 혼합기에서 기상의 LPG와 공기를 소정 비율, 즉 가능한한 이론 공연비로 혼합하여 엔진에 공급하도록 되어 있다.In general, LPG vehicles have a lower output than gasoline vehicles, but they are widely used because of low fuel costs and reduction of environmental pollution due to exhaust gases. LPG of the gas is regulated, vaporized and pressure-reduced to the atmospheric pressure in the vaporizer through the filter and the solenoid valve, so that the gaseous LPG and air are mixed in the mixer at a predetermined ratio, that is, the theoretical air-fuel ratio, and supplied to the engine.
엔진에의 연료 공급은 베이퍼라이저에서 운전 상태에 따라 공기와 연료를 요구되는 비율로 혼합하여 이루어지며, 연료의 완전연소를 위한 최소 공기량과 연료의 비를 이론 공연비라고 하며, 보통 가솔린 자동차에서는 14.5-15.0이지만 LPG 자동차에서는 1정도가 되어 그 이하일 경우에 농후한 혼합비라 하며 그 이상일 경우에는 회박한 혼합비라 부르고 있으며, LPG 자동차의 경우에 이론 공연비는 1 정도로 된다. 이러한 공연비는 운전상태, 즉 시동시에는 매우 농후하게 공급하고, 무부하 운전시에는 흡기량이 적고 배기가 불완전하여 농후한 상태로 공급하며, 저속 운전시와 고부하 운전시 및 급가속시에는 비교적 농후하게 공급하며 가장 경제적으로 운전할 수 있는 중속운전시에는 이론 공연비 보다 희박하게 공급하게 된다.The fuel supply to the engine is made by mixing air and fuel at the required ratio according to the driving condition in the vaporizer. The minimum air volume and fuel ratio for complete combustion of fuel is called theoretical air fuel ratio, and in general gasoline cars, 14.5-15.0 However, in LPG cars, it is called a rich mixing ratio when it is about 1 and below, and when it is above, it is called as a simple mixing ratio. In case of LPG cars, the theoretical air fuel ratio is about 1. This air-fuel ratio is supplied very rich in the driving state, that is, at start-up, and is supplied in a dense state at the time of no-load operation with a small amount of intake and incomplete exhaust, and relatively rich at low speed, high-load operation and rapid acceleration. In the case of medium speed driving, which can be operated most economically, it is supplied lean than theoretical air-fuel ratio.
LPG 자동차의 경우 연료공급은, 도 1에 도시된 바와같이 도면에 도시되지 않은 탱크로 부터 공급되는 연료는 베이퍼라이저(1)의 2차 감압실에서 벤츄리(2)로 공급되며, 배기다기관에 제공된 산소 센서(3)를 이용하여 배기가스중의 산소농도를 검출한 신호를 받은 전자제어유니트(4)에서 미리 입력된 프로그램에 의해 엔진으로의 LPG 공급량의 농후 또는 희박을 체크하여 이론 공연비에 이르도록 베이퍼라이저(1)의 LPG를 이용하여 솔레노이드밸브(5)에 의해 엔진(6)으로 LPG 공급하여 구성되어 있으며, 특히, 무부하운전 즉 아이들링운전시에 종래 LPG 자동차에서의 공연비 조정은 베이퍼라이저의 아이들 조정 스크류로 2차 감압실(7)의 LPG 압력을 조정하여 벤튜리(2) 및 바이패스 제트(8)를 통해 유입되는 연료량을 제어하여 공연비를 조정하도록 되어 있다. 이때 솔레노이드밸브에 의한 연료 공급을 이론 공연비의 50%까지 조절하게 되어 있으며, 도면에서 부호 9은 에어클리너이다. 이와같이 산소농도를 검출하여 마이크로프로세서와 같은 전자제어유니트에 의해 엔진으로의 연료 공급량을 이론 공연비에 적합하게 제어하는 제어방식을 피드백 제어라 부른다.In the case of an LPG vehicle, fuel supply is performed by supplying fuel from a tank (not shown) to the venturi 2 in the secondary pressure reducing chamber of the vaporizer 1, as shown in FIG. By using a sensor (3) to detect the oxygen concentration in the exhaust gas, the electronic control unit (4) checks the richness or leanness of the LPG supply amount to the engine by a program input in advance, and reaches the theoretical air-fuel ratio. LPG of (1) is used to supply LPG to the engine 6 by the solenoid valve 5, and in particular, the air-fuel ratio adjustment in conventional LPG cars during no load operation, i.e. The air-fuel ratio is adjusted by adjusting the LPG pressure in the secondary pressure reducing chamber 7 by controlling the amount of fuel flowing through the venturi 2 and the bypass jet 8. At this time, the fuel supply by the solenoid valve is to be adjusted to 50% of the theoretical air-fuel ratio, 9 in the drawing is an air cleaner. In this way, the control method of detecting the oxygen concentration and controlling the fuel supply amount to the engine in accordance with the theoretical air-fuel ratio by an electronic control unit such as a microprocessor is called feedback control.
그러나, 이러한 종래의 솔레노이드밸브에 의한 공연비 조정은 2차 감압실(7)의 연료만을 이용하여 수행하기 때문에 운전상태에 따라 적절히 조정해야 하는 공연비 제어폭이 좁고 부품의 경시변화 등의 외부 영향에 민감하게 정격효율이 변동하게 되어 착화 또는 폭발행정이 원활하게 이루어지지 않는 등 아이들링운전시 부조현상이 발생하기 쉬운 문제가 있었다.However, since the air-fuel ratio adjustment by the conventional solenoid valve is carried out using only the fuel in the secondary pressure reducing chamber 7, the air-fuel ratio control range that needs to be adjusted appropriately according to the operating state is narrow and sensitive to external influences such as changes over time of parts. In this case, the rating efficiency is fluctuated so that the ignition or explosion stroke is not smoothly performed.
본 발명은 상술한 종래 기술의 문제를 해결하기 위한 것으로, 아이들링 운전시의 공연비 제어를 베이퍼라이저의 1차 감압실 압력을 이용한 솔레노이드밸브를 추가로 설치하여 산소센서로 부터의 신호에 의해 스로틀밸브와 벤튜리 사이의 연료 연료분출 및 벤튜리 연료분출구를 통해 메인 솔레노이드밸브와 함께 피드백 제어하여 공연비의 제어폭을 확대하여 보다 안정된 연료공급을 할 수 있는 LPG 차량의 연료공급장치의 제공을 목적으로 한다.The present invention is to solve the above-described problems of the prior art, the air-fuel ratio control during the idling operation is further provided with a solenoid valve using the first pressure reducing chamber pressure of the vaporizer, the throttle valve and the ben by the signal from the oxygen sensor The purpose of the present invention is to provide an LPG vehicle fuel supply device capable of providing a more stable fuel supply by expanding the control range of the air-fuel ratio by feedback control with the main solenoid valve through the fuel injection and the venturi fuel injection port between the turrets.
도 1은 종래 액화석유가스(LPG) 차량의 연료공급계통의 개략적인 구성도.1 is a schematic configuration diagram of a fuel supply system of a conventional liquefied petroleum gas (LPG) vehicle.
도 2는 본 발명에 따른 LPG 차량의 연료공급장치를 채용한 연료공급계통의 개략적인 구성도.2 is a schematic configuration diagram of a fuel supply system employing a fuel supply device of an LPG vehicle according to the present invention.
* 도면의 주요 부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings
10 : 베이퍼라이저 11 : 1 차 감압실10: Vaporizer 11: Primary decompression chamber
12 : 2차감압실 17 : 전자제어유니트12: secondary decompression chamber 17: electronic control unit
19, 22 : 솔레노이드밸브 18, 23 : 분기관19, 22: solenoid valve 18, 23: branch pipe
20 : 벤튜리 24 : 스로틀밸브20: Venturi 24: Throttle Valve
상기한 목적을 달성하기 위한 본 발명의 LPG 차량의 연료공급장치는 산소센서에 의해 검출되는 차량의 배기가스중의 산소농도에 대한 신호를 입력받아 전자제어유니트에 의해 연료 공급량을 이론 공연비에 적합하게 하도록 제어되는 메인 솔레노이드밸브로 베이퍼라이저의 2차 감압실의 연료를 벤튜리와 바이패스 제트로 연료를 공급하도록 된 것에 있어서, 상기 메인 솔레노이드밸브에 의한 2차 감압실 연료의 공급과 더불어 전자제어유니트의 제어하에 상기 베이퍼라이저의 1차 감압실의 연료를 스로틀밸브와 벤튜리 사이에 공급하여 아이들링운전시의 이론 공연비를 맞추도록 보조 솔레노이드밸브를 구비한 것을 특징으로 하여 구성된다.The fuel supply apparatus of the LPG vehicle of the present invention for achieving the above object receives a signal for the oxygen concentration in the exhaust gas of the vehicle detected by the oxygen sensor to adjust the fuel supply amount to the theoretical air-fuel ratio by the electronic control unit The main solenoid valve is controlled to supply fuel to the secondary pressure reducing chamber of the vaporizer to the venturi and the bypass jet, wherein the secondary pressure reducing chamber fuel is supplied by the main solenoid valve. And an auxiliary solenoid valve for supplying the fuel of the primary pressure reducing chamber of the vaporizer between the throttle valve and the venturi under control to match the theoretical air-fuel ratio during idling operation.
이하, 본 발명의 일실시예를 도시한 첨부도면을 참고하여 본 발명을 상세히 설명하기로 한다.Hereinafter, with reference to the accompanying drawings showing an embodiment of the present invention will be described in detail the present invention.
도 2는 본 발명에 따른 LPG 차량의 연료공급 제어장치의 개략적인 구성을 보여주고 있으며, 도면에 도시되지 않은 LPG 탱크로 부터 공급되는 액상 및 기상의 LPG는 베이퍼라이저(10)의 1차 감압실(11)로 인입되어 기체상태로 약 0.3 ㎏/㎠로 감압되어 2차 감압실(12)에서 대기압으로 감압된다. 상기 1차 감압실(11)과 2차 감압실(12)에는 통상 다이아프램(13)이 제공되고 설정압력에 의해 1차 감압실의 연료를 2차 감압실로 공급하도록 작동하는 밸브(14)가 제공되어 있다. 또한, 엔진(15)에 연결된 배기가스 다기관에는 배기가스중의 산소농도를 검출하기 위하여 도면에 개략적으로 도시된 산소센서(16)가 제공되고, 산소센서(16)로 부터의 출력신호는 전자제어유니트(17)로 입력되고, 전자제어유니트는 차량의 각종 센서들로 부터 신호를 입력받아 미리 설정된 데이터와 비교하여 운전상태를 체크하고 최적상태를 유지하도록 제어신호를 출력한다.Figure 2 shows a schematic configuration of the fuel supply control device of the LPG vehicle according to the present invention, the liquid and gaseous LPG supplied from the LPG tank not shown in the drawing is the first decompression chamber of the vaporizer 10 ( 11) and decompressed to about 0.3 kg / cm 2 in a gaseous state and decompressed to atmospheric pressure in the secondary decompression chamber 12. The primary decompression chamber 11 and the secondary decompression chamber 12 are usually provided with a diaphragm 13 and a valve 14 operable to supply fuel of the primary decompression chamber to the secondary decompression chamber by a set pressure. It is provided. In addition, the exhaust gas manifold connected to the engine 15 is provided with an oxygen sensor 16 schematically shown in the drawing for detecting the oxygen concentration in the exhaust gas, and the output signal from the oxygen sensor 16 is electronically controlled. Input to the unit 17, the electronic control unit receives signals from various sensors of the vehicle and compares them with preset data to check the driving state and output a control signal to maintain the optimum state.
상기 2차 감압실(12)에는 종래와 같이 분기관(18)이 연결되어 있고 그 분기관에는 메인 솔레노이드밸브(19)가 설치되어 2차 감압실의 기상의 LPG를 벤튜리(20)와 바이패스 제트(21)로 공급하도록 되어 있고, 제 1차 감압실(11)에는 본 발명에 따라 보조 솔레노이드밸브(22)가 설치된 분기관(23)이 연결되어 보조 솔레노이드밸브(22)에 의해 스로틀밸브(24)와 벤튜리(20) 사이에 LPG를 공급하도록 되어 있다. 상기 1차 감압실의 분기관(23)과 2차 감압실의 분기관(18)의 단부들이 연통되어 있어서 상기 메인 솔레노이드밸브(19)와 보조 솔레노이드밸브(22)에 의해 기상의 LPG가 엔진에 균일하게 공급될 수 있다. 상기 메인 솔레노이드밸브(19)와 보조 솔레노이드밸브(22)는 전자제어유니트(17)에 의해 선택적으로 제어되어 LPG 공급량이 차량의 운전조건에 따라 요구되는 엔진의 이론 공연비에 적합하도록 한다.A branch pipe 18 is connected to the secondary pressure reducing chamber 12 as in the prior art, and a main solenoid valve 19 is installed at the branch pipe so that the LPG of the gaseous phase of the secondary pressure reducing chamber is exchanged with the venturi 20. The supply pipe 21 is supplied to the pass jet 21, and the branch pipe 23 in which the auxiliary solenoid valve 22 is installed is connected to the first pressure reducing chamber 11 by the auxiliary solenoid valve 22. LPG is supplied between 24 and the venturi 20. End portions of the branch pipe 23 of the primary decompression chamber and the branch pipe 18 of the secondary decompression chamber communicate with each other, so that the LPG in the gas phase is supplied to the engine by the main solenoid valve 19 and the auxiliary solenoid valve 22. It can be supplied uniformly. The main solenoid valve 19 and the auxiliary solenoid valve 22 are selectively controlled by the electronic control unit 17 so that the LPG supply amount is suitable for the theoretical air-fuel ratio of the engine required according to the driving conditions of the vehicle.
예를들어, 산소센서(16)로 부터 검출된 신호로 부터, 배기가스중의 산소농도가 농후한 것으로 나타나면 LPG의 부족을 의미하여 엔진으로 공급되는 LPG의 량을 증대시키도록 메인 솔레노이드밸브(19)와 보조 솔레노이드밸브(22)를 제어하며, 또한 배기가스중의 산소농도가 희박한 것으로 나타나면 공기량에 비하여 공급되는 LPG의 량이 과도한 것을 의미하여 메인 솔레노이드밸브(19)와 보조 솔레노이드밸브(22)에 의해 공급되는 LPG의 공급량을 감소시키도록 전자제어유니트에 의해 제어된다. 이러한 제어는 단지 산소센서외에 다른 통상적인 센서들의 신호들을 이용하여 엔진의 부하조건 등 여러 가지의 조건들을 감안하여 최적의 운전을 위하여 이론 공연비를 맞추도록 이루어진다. 상기 메인 솔레노이드밸브(19)와 보조 솔레노이드밸브(22)는 함께 또는 독립적으로 전자제어유니트에 의해 제어가능하다.For example, if the oxygen concentration in the exhaust gas is found to be rich from the signal detected by the oxygen sensor 16, the main solenoid valve 19 may be used to increase the amount of LPG supplied to the engine, indicating a lack of LPG. ) And the auxiliary solenoid valve 22, and when the oxygen concentration in the exhaust gas is found to be thin, it means that the amount of LPG supplied to the air amount is excessive, and is controlled by the main solenoid valve 19 and the auxiliary solenoid valve 22. It is controlled by the electronic control unit to reduce the amount of LPG supplied. This control is made using the signals of other sensors in addition to the oxygen sensor to adjust the theoretical air-fuel ratio for optimal operation in consideration of various conditions such as the load condition of the engine. The main solenoid valve 19 and the auxiliary solenoid valve 22 can be controlled together or independently by an electronic control unit.
본 발명에 따라 메인 솔레노이드밸브(19)로 제 2차 감압실의 연료를 공급함와 함께 보조 솔레노이드밸브(22)로 상대적으로 압력이 높은 제 1차 감압실의 연료를 공급하도록 구성하여 전자제어유니트에 의해 제어가능한 공연비의 폭을 확대시킬 수 있게 되어 차량 엔진의 운전, 특히 아이들링 운전을 보다 안정되게 제어할 수 있게 된다.According to the present invention, the secondary solenoid valve 19 is supplied with fuel to the secondary pressure reducing chamber, and the secondary solenoid valve 22 is configured to supply fuel with a relatively high pressure in the primary pressure reducing chamber by the electronic control unit. The width of the controllable air-fuel ratio can be enlarged, so that the driving of the vehicle engine, particularly the idling driving, can be more stably controlled.
본 발명의 LPG 차량의 연료공급장치에 따라, 메인 솔레노이드밸브(19)에 의해 베이퍼라이저의 2차 감압실 연료만으로 제어가능한 공연비의 폭과 비교하여 메인 솔레노이드 밸브(19)와 함께 또는 독립적으로 보조 솔레노이드밸브(22)에 의해 베이퍼라이저의 1차 감압실의 상대적으로 고압의 연료를 공급할 수 있도록 한 구성에 의해 제어가능한 공연비 폭을 크게 증대시킬 수 있게 되어 결국, 간편하게 아이들링 운전의 안정성을 구현할 수 있는 장점이 있다.According to the fuel supply apparatus of the LPG vehicle of the present invention, the main solenoid valve 19 together with or independently of the main solenoid valve 19 in comparison with the width of the air-fuel ratio which can be controlled only by the secondary pressure reducing chamber fuel of the vaporizer. By 22, it is possible to greatly increase the controllable air-fuel ratio width by the configuration that can supply the fuel of the relatively high pressure in the primary decompression chamber of the vaporizer, and thus, there is an advantage that the stability of the idling operation can be easily realized. .
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019980058268A KR100309142B1 (en) | 1998-12-24 | 1998-12-24 | Fuel supply control device for liquefied petroleum gas vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019980058268A KR100309142B1 (en) | 1998-12-24 | 1998-12-24 | Fuel supply control device for liquefied petroleum gas vehicle |
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| Publication Number | Publication Date |
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| KR20000042162A KR20000042162A (en) | 2000-07-15 |
| KR100309142B1 true KR100309142B1 (en) | 2001-12-28 |
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| KR1019980058268A KR100309142B1 (en) | 1998-12-24 | 1998-12-24 | Fuel supply control device for liquefied petroleum gas vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20020040461A (en) * | 2000-11-24 | 2002-05-30 | 김영봉 | vaporizer of LPG car |
| KR20030049098A (en) * | 2001-12-14 | 2003-06-25 | 현대자동차주식회사 | System for supplying fuel for lpg vehicle and method for controlling the same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR960023228U (en) * | 1994-12-16 | 1996-07-20 | Fuel supply control device with independent slow system of LPI vehicle | |
| KR970066009A (en) * | 1996-03-18 | 1997-10-13 | 김영귀 | Control of air-fuel ratio using auxiliary fuel of LPG vehicle |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR960023228U (en) * | 1994-12-16 | 1996-07-20 | Fuel supply control device with independent slow system of LPI vehicle | |
| KR970066009A (en) * | 1996-03-18 | 1997-10-13 | 김영귀 | Control of air-fuel ratio using auxiliary fuel of LPG vehicle |
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