KR0177479B1 - Fuel feed system for vehicle using lpg - Google Patents

Fuel feed system for vehicle using lpg Download PDF

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Publication number
KR0177479B1
KR0177479B1 KR1019960021727A KR19960021727A KR0177479B1 KR 0177479 B1 KR0177479 B1 KR 0177479B1 KR 1019960021727 A KR1019960021727 A KR 1019960021727A KR 19960021727 A KR19960021727 A KR 19960021727A KR 0177479 B1 KR0177479 B1 KR 0177479B1
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South Korea
Prior art keywords
lpg
vaporizer
solenoid valve
fuel
vehicle
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KR1019960021727A
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Korean (ko)
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KR980002750A (en
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김재국
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양재신
대우자동차 주식회사
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Priority to KR1019960021727A priority Critical patent/KR0177479B1/en
Publication of KR980002750A publication Critical patent/KR980002750A/en
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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
    • F02M13/00—Arrangements of two or more separate carburettors; Carburettors using more than one fuel
    • F02M13/08—Carburettors adapted to use liquid and gaseous fuels, e.g. alternatively
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/02—Controlling 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
    • F02D19/026—Measuring or estimating parameters related to the fuel supply system
    • F02D19/027—Determining the fuel pressure, temperature or volume flow, the fuel tank fill level or a valve position
    • 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
    • F02M21/0209—Hydrocarbon fuels, e.g. methane or acetylene
    • F02M21/0212—Hydrocarbon fuels, e.g. methane or acetylene comprising at least 3 C-Atoms, e.g. liquefied petroleum gas [LPG], propane or butane
    • 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

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Abstract

본 발명은 LPG차량의 연료공급시스템에 관한 것으로, 특히 LPG봄베로부터 액상/기상의 LPG를 선택적으로 베이퍼라이져에 공급하여 주는 2개의 관로를 하나의 관로로 통합하여 설치비용을 절감시킨 LPG차량의 연료공급시스템에 관한 것으로, LPG봄베(10)에 충진된 연료를 이그니션 스위치(12)에 의해 작동하는 ECU에 의해 연료공급관로를 제어하여 베이퍼라이져(16)와 믹서를 거쳐서 엔진연소실(20)로 공급시키도록 한 LPG차량의 연료공급시스템에 있어서,상기 LPG봄베(10)와 베이퍼라이져(16)의 사이에 솔레노이드 밸브(22)를 하나의 공급관로(23)로 연결하고, 이 솔레노이드 밸브(22)와 베이퍼 라이져(16)의 사이에 이그니션 스위치(12)를 온하여 엔진이 시동임을 판단하였을 경우 냉각수의 온도를 측정한 ECU(14)에 의해 설정된 냉각수의 온도를 비교,판단하여 선택적으로 작동되는 LPG펌프(24)를 연결한 것을 특징으로 한다.The present invention relates to a fuel supply system for an LPG vehicle, and in particular, the LPG vehicle fuel, which reduces installation costs by integrating two pipelines that selectively supply liquid / phase LPG to the vaporizer from the LPG cylinder. The supply system relates to supplying fuel filled in the LPG cylinder 10 to an engine combustion chamber 20 through a vaporizer 16 and a mixer by controlling a fuel supply line by an ECU operated by an ignition switch 12. In the LPG vehicle fuel supply system, the solenoid valve 22 is connected between the LPG cylinder 10 and the vaporizer 16 by a single supply line 23, and the solenoid valve 22 is connected. When the ignition switch 12 is turned on between the and the riser 16 and the engine is started, the temperature of the coolant set by the ECU 14 which measures the coolant temperature is compared and judged. It is characterized by connecting the operating LPG pump 24.

Description

LPG차량의 연료 공급시스템LPG vehicle fuel supply system

제1도는 본 발명에 따른 LPG차량의 연로공급지스템의 개략적인 구성도.1 is a schematic configuration diagram of a fuel supply system of an LPG vehicle according to the present invention.

제2도는 본 발명에 따른 연로공급시스템의 플로우차트.2 is a flowchart of the fuel supply system according to the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

10 : LPG봄베 12 : 이그니션스위치10: LPG Bomb 12: Ignition switch

14 : ECU(Electric Control Unit) 16 : 베 이 른 퍼라이져14 ECU (Electric Control Unit) 16: Bayern Paraiser

22 : 솔레노이드밸브 23 : 공급관로22: solenoid valve 23: supply line

24 : LPG펌프24: LPG Pump

본 발명은 LPG차량의 연료공급시스템에 관한 것으로, 특히 LPG봄베로부터 액상/기상의 LPG를 선택적으로 베이퍼라이져에 공급하여 주는 2개의 관로를 하나의 관로로 통합하여 설치비용을 절감시킨 LPG차량의 연료공급시스템에 관한 것이다.The present invention relates to a fuel supply system for an LPG vehicle, and in particular, the LPG vehicle fuel, which reduces installation costs by integrating two pipelines that selectively supply liquid / phase LPG to the vaporizer from the LPG cylinder. It relates to a supply system.

종래 LPG차량의 연료공급은 LPG봄베 → LPG휠터 → 솔레노이드 밸브→ 프리히터 → 베이퍼라이져 → 믹서를 경유하여 엔진 연소실로 공급되도록 되어 있다.The fuel supply of the conventional LPG vehicle is to be supplied to the engine combustion chamber via the LPG cylinder → LPG filter → solenoid valve → preheater → vaporizer → mixer.

즉, LPG봄베에 충진된 액상 LPG는 송출밸브를 통해 휠터에 의해 여과된 후 솔레노이드 밸브에 전달되고, 이때 솔레노이드 밸브는 연료통로 개폐를 전자석에 의해 여닫게 되는데 엔진 시동시는 점화스위치의 스타트 단자 전압에 의해 작동된다. 솔레노이드 밸브를 통과한 LPG는 베이퍼라이져로 들어와 감압 기화되고, 기화된 LPG는 적당한 압력으로 조정되어 믹서로 들어가게 된다.In other words, the liquid LPG filled in the LPG cylinder is filtered by the filter through the delivery valve and then delivered to the solenoid valve, where the solenoid valve opens and closes the fuel passage by electromagnets. Works by. The LPG passed through the solenoid valve enters the vaporizer and vaporizes under reduced pressure, and the vaporized LPG is adjusted to the appropriate pressure and entered the mixer.

여기서 상기 솔레노이드 밸브는 기상용 솔레노이드 밸브와 액상용 솔레노이드 밸브가 일체로 구성되어 LPG의 액상과 기상을 ECU의 작동에 따라 기상/액상 솔레노이드 밸브와 LPG봄베에 각각 연결된 기상관로 및 액상관로를 통하여 LPG가 공급되도록 되어 있다.Here, the solenoid valve is composed of a gaseous solenoid valve and a liquid solenoid valve are integrated into the LPG through the gas phase pipeline and the liquid phase pipeline connected to the gas phase / liquid solenoid valve and the LPG bomb, respectively, according to the operation of the ECU. Is to be supplied.

이와 같이 구성된 종래의 LPG연료 공급시스템에 있어서, 복수식 솔레노이드 밸브와 액상 및 기상관로 2개를 사용함으로써 설치공간이 커질 뿐만 아니라 제작비용이 상승하는 단점이 있다.In the conventional LPG fuel supply system configured as described above, by using a plurality of solenoid valves and two liquid and gas pipelines, the installation space is increased and the manufacturing cost is increased.

따라서 본 발명은 상기와 같은 사정을 감안하여 창안된 것으로, 복수식 솔레노이드 밸브를 단동식 솔레노이드 밸브로 구성하고 여기에 하나의 관로를 LPG봄베에 연결하여 설치비용을 절감함과 동시에 솔레노이드 밸브와 베이퍼라이져 사이에 연결된 LPG펌프를 시동 시에만 작동하도록 하여 내구성을 향상시킨 LPG차량의 연료공급시스템을 제공함에 그 목적이 있다.Therefore, the present invention was devised in view of the above circumstances, and consists of a plurality of solenoid valves as single-acting solenoid valves and connects one pipeline to the LPG cylinder to reduce the installation cost and at the same time solenoid valve and vaporizer. The purpose of the present invention is to provide a fuel supply system for LPG vehicles which improves durability by operating the LPG pump connected between them only at start-up.

상기의 목적을 달성하기 위한 본 고안의 구체적인 수단은, LPG봄베에 충진된 연료를 이그니션 스위치에 의해 작동하는 ECU에 의해 연료공급관로를 제어하여 베이퍼라이져와 믹서를 거쳐서 엔진연소실로 공급시키도록 한 LPG차량의 연료공급시스템에 있어서, 상기 LPG봄베와 베이퍼라이져 사이에 솔레노이드 밸브를 하나의 공급관로로 연결하고, 이 솔레노이드 밸브와 베이퍼 라이져의 사이에 이그니션 스위치를 온 하여 엔진이 시동임을 판단하였을 경우 냉각수의 온도를 측정한 ECU에 의해 설정된 냉각수의 온도를 비교, 판단하여 선택적으로 작동되는 LPG펌프를 연결한 것을 특징으로 한다.Specific means of the present invention for achieving the above object, LPG to control the fuel supply line by the ECU operated by the ignition switch to supply the fuel filled in the LPG cylinder to the engine combustion chamber via the vaporizer and the mixer In the fuel supply system of the vehicle, when the solenoid valve is connected between the LPG cylinder and the vaporizer with a single supply line, and the ignition switch is turned on between the solenoid valve and the vaporizer, the engine is started. An LPG pump, which is selectively operated by comparing and determining the temperature of the coolant set by the ECU measuring the temperature, may be connected.

이하, 첨부된 도면을 참조하여 본 고안의 실시예를 상세히 설명하면 다음과 같다Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

제1도에 도시한 바와 같이 LPG봄베(10)에 충진된 연료를 이그니션 스위치(12)에 의해 작동하는 ECU(14)에 의해 연료공급관로를 제어하여 베이퍼라이져(16)와 믹서(18)를 거쳐서 엔진연소실(20)로 공급시키도록 한 LPG차량의 연료공급시스템에 있어서, 상기 LPG봄베(10)와 베이퍼라이져(16) 사이에 하나의 솔레노이드 밸브(22)를 하나의 공급관로(23)로 연결하고, 이 솔레노이드 밸브(22)와 베이퍼라이져(16)의 사이에 이그니션 스위치(12)를 온 하였을 경우 냉각수의 저온을 감지한 ECU(14)에 의해 작동되는 LPG펌프(24)를 연결한 구성이다.As shown in FIG. 1, the fuel supply line is controlled by the ECU 14 which operates the fuel filled in the LPG cylinder 10 by the ignition switch 12 to control the vaporizer 16 and the mixer 18. In the fuel supply system of the LPG vehicle which is to be supplied to the engine combustion chamber 20 via, one solenoid valve 22 is connected to the supply line 23 between the LPG cylinder 10 and the vaporizer 16. When the ignition switch 12 is turned on between the solenoid valve 22 and the vaporizer 16, the LPG pump 24 operated by the ECU 14 which senses the low temperature of the coolant is connected. to be.

이때, ECU(14)는 냉각수의 온도가 저온시(15℃이하) 솔레노이드 밸브(22)와 LPG펌프(24)를 순차적으로 작동시키도록 되어 있고, 이에 반하여 냉각수의 온도가 상온(또는 고온)(15'c이상)시에 LPG펌프(24)는 정지하고 솔레노이드 밸브(22)가 작동하도록 되어 있다.At this time, the ECU 14 is configured to operate the solenoid valve 22 and the LPG pump 24 sequentially when the temperature of the cooling water is low (15 ° C. or lower), while the temperature of the cooling water is room temperature (or high temperature) ( At 15'c or more), the LPG pump 24 is stopped and the solenoid valve 22 is operated.

이와 같이 구성된 본 실시예의 작용효과를 제 2도의 플로우차트를 참조하여 설명한다.Effects of the present embodiment configured as described above will be described with reference to the flowchart of FIG.

먼저, 이그니션 스위치(12)를 온 시켜 스타트 전원이 입력되면 ECU(14)는 이그니션 스위치(12)의 작동을 확인하게 된다. (단계 S1)First, when the start power is input by turning on the ignition switch 12, the ECU 14 confirms the operation of the ignition switch 12. (Step S1)

이그니션 스위치(12)가 작동하면 엔진시동을 확인 판단하고 (단계 S2), 엔진이 시동하게 되면 냉각수 온도센서에 의해 냉각수의 온도(T)를 측정하게 된다. (단계 S3)When the ignition switch 12 operates, the engine is checked and determined (step S2), and when the engine is started, the temperature (T) of the coolant is measured by the coolant temperature sensor. (Step S3)

이후, 측정한 냉각수 온도(T)와 설정된 온도(TD)를 ECU(14)가 비교, 판단하게 된다. (단계 S4) 여기서 측정온도(T)가 설정은도(TD)보다 저온임을 판단하게 되면, 솔레노이드 밸브(22)가 작동하여 연료유로가 개방되고, 순차적으로 LPG펌프(24)가 순차적으로 작동하고 (단계 S5), LPG펌프(24)의 흡입력에 의해 LPG연료는 공급관로(23)를 통하여 개방된 솔레노이드 밸브(22)를 경유하여 LPG연료가 베이퍼라이져(16)로 공급하게 된다Thereafter, the ECU 14 compares and determines the measured cooling water temperature T and the set temperature T D. (Step S4) Here, when it is determined that the measured temperature T is lower than the set temperature T D , the solenoid valve 22 is operated to open the fuel flow passage, and the LPG pump 24 is sequentially operated. (S5), LPG fuel is supplied to the vaporizer 16 by the suction force of the LPG pump 24 via the solenoid valve 22 opened through the supply line 23.

한편, 상기 단계 4에서 ECU(14)에서 비교, 판단한 냉각수의 온도(T)가 상온(또는 고온)인 경우에는 LPG펌프(24)에 전원을 차단하여 LPG펌프(24)의 구동을 정지시키고, 솔레노이드 밸브(22)만 작동시키게 된다. (단계 S6)On the other hand, when the temperature (T) of the coolant compared and determined by the ECU 14 in step 4 is room temperature (or high temperature), the LPG pump 24 is turned off to stop the operation of the LPG pump 24, Only solenoid valve 22 will be activated. (Step S6)

따라서 LPG연료는 LPG펌프(24)를 경유하지 않고 솔레노이드 밸브(22)를 통하여 베이퍼라이져(16)로 직접 흐르게 된다.Therefore, the LPG fuel flows directly to the vaporizer 16 through the solenoid valve 22 without passing through the LPG pump 24.

이같이 솔레노이드 밸브(22)와 LPG봄베(10)를 연결하는 공급관로(23)를 하나로 연결한 상태에서 냉각수 온도의 설정값 이상이면 기상상태의 LPG가 공급관로(23), 솔레노이드밸브(22), 베이퍼라이져(16)의 순으로 흐르게 되고, 이에 반해 냉각수의 온도가 설정값 이하이면 LPG펌프(24)가 작동하여 액상상태의 LPG가 공급관로(23), 솔레노이드 밸브(22), LPG펌프(24), 베이퍼라이져(16)의 순으로 흐르게 된다.As such, when the supply line 23 connecting the solenoid valve 22 and the LPG cylinder 10 is connected to one, the LPG in the gaseous state is supplied to the supply line 23, the solenoid valve 22, On the other hand, when the temperature of the cooling water is lower than the set value, the LPG pump 24 operates to supply the liquid phase LPG to the supply line 23, the solenoid valve 22, and the LPG pump 24. ), The vaporizer 16 flows in this order.

상기한 바와 같이 복수식 솔레노이드 밸브를 단동식 솔레노이드 밸브로 구성하고 여기에 하나의 관로를 LPG봄베에 연결하고, LPG펌프에 의해 선택적으로 연료의 흐름을 전환하도록 구성함으로써 공급관로의 설치비용 및 설치공간을 줄일 수 있다As described above, a plurality of solenoid valves are configured as single-acting solenoid valves, and one pipe is connected to the LPG cylinder, and the fuel flow is selectively installed by the LPG pump to switch the flow of fuel. Can reduce

Claims (1)

LPG봄베(10)에 충진된 연료를 이그니션 스위치(12)에 의해 작동하는 ECU에 의해 연료공급관로를 제어하여 베이퍼라이져(16)와 믹서를 거쳐서 엔진연소실(20)로 공급시키도록 한 LPG차량의 연료공급시스템에 있어서; 상기 LPG봄베(10)와 베이퍼라이져(16)의 사이에 솔레노이드 밸브(22)를 하나의 공급관로(23)로 연결하고, 이 솔레노이드 밸브(22)와 베이퍼라이져(16)의 사이에 이그니션 스위치(12)를 온하여 엔진이 시동임을 판단하였을 경우 냉각수의 온도를 측정한 ECU(14)에 의해 설정된 냉각수의 온도를 비교, 판단하여 선택적으로 작동되는 LPG펌프(24)를 연결한 것을 특징으로 하는 LPG차량의 연료공급시스템.In the LPG vehicle, fuel supplied to the LPG cylinder 10 is controlled by the ECU operated by the ignition switch 12 to supply fuel to the engine combustion chamber 20 through the vaporizer 16 and the mixer. A fuel supply system; The solenoid valve 22 is connected between the LPG cylinder 10 and the vaporizer 16 by one supply line 23, and an ignition switch (B) between the solenoid valve 22 and the vaporizer 16 is provided. LPG characterized in that the LPG pump 24, which is selectively operated by comparing and determining the temperature of the coolant set by the ECU 14 measuring the coolant temperature when the engine is started by determining that the engine is started. Vehicle fuel supply system.
KR1019960021727A 1996-06-17 1996-06-17 Fuel feed system for vehicle using lpg KR0177479B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020020570A (en) * 2000-09-09 2002-03-15 이병옥 Pressure control system of lpg bombe
KR100448396B1 (en) * 2002-11-08 2004-09-10 현대자동차주식회사 Start warning control device of lpi engine and method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020020570A (en) * 2000-09-09 2002-03-15 이병옥 Pressure control system of lpg bombe
KR100448396B1 (en) * 2002-11-08 2004-09-10 현대자동차주식회사 Start warning control device of lpi engine and method thereof

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Publication number Publication date
KR980002750A (en) 1998-03-30

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