KR20100060480A - Leakage detection and treatment method for lpi vehicle - Google Patents

Leakage detection and treatment method for lpi vehicle Download PDF

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KR20100060480A
KR20100060480A KR1020080119083A KR20080119083A KR20100060480A KR 20100060480 A KR20100060480 A KR 20100060480A KR 1020080119083 A KR1020080119083 A KR 1020080119083A KR 20080119083 A KR20080119083 A KR 20080119083A KR 20100060480 A KR20100060480 A KR 20100060480A
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leakage
fuel
pressure
checking
pressure difference
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KR1020080119083A
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Korean (ko)
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KR101054046B1 (en
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소창영
이종신
김성기
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주식회사 케피코
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/22—Safety or indicating devices for abnormal conditions
    • 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
    • F02M21/0218—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
    • F02M21/0239—Pressure or flow regulators therefor
    • 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
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/22—Safety or indicating devices for abnormal conditions
    • F02D2041/224—Diagnosis of the fuel system
    • F02D2041/225—Leakage detection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/22—Safety or indicating devices for abnormal conditions
    • F02D2041/227—Limping Home, i.e. taking specific engine control measures at abnormal conditions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/22—Safety or indicating devices for abnormal conditions
    • F02D2041/228—Warning displays
    • 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
    • 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
    • Y02T10/40—Engine management systems

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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)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Abstract

PURPOSE: A leakage detector of a LPI vehicle and a processing method are provided to make the smooth and safe engine operation by selectively composing modes for controlling an engine according to the leakage amount of a fuel. CONSTITUTION: A leakage detector of a LPI vehicle and a processing method comprises: a step of measuring the temperature and the pressure of a fuel line(S101); a step of calculating the pressure of a fuel tank according to the measured pressure from the saturated vapor pressure relation of the fuel according to temperature(S102); a step of calculating a pressure difference according to the calculated pressure of the fuel tank and measured pressure of the fuel(S103); and a step of checking the air leakage according to the size of the pressure difference which is calculated in the pressure difference calculate step(S104).

Description

엘피아이 차량의 누기 확인 및 처리방법{Leakage detection and treatment method for LPI Vehicle}Leakage detection and treatment method for LPI Vehicle

본 발명은 엘피아이 차량의 누기 확인 및 처리방법에 관한 것으로서, 보다 상세하게는 엘피아이 엔진이 탑재된 차량이 시동이 오프된 후, 차량의 대부분의 구성부의 온도가 주위의 온도와 동일한 수준으로 충분히 냉각된 후 다시 시동을 걸게 되는 경우에, 인젝터를 통한 엘피아이 연료의 누출 여부를 감지하는 것과 그 누출에 따른 후속 처리의 방법에 관한 기술이다.The present invention relates to a method for checking and handling the leakage of an Elpia vehicle, and more particularly, after a vehicle in which an Elpia engine is mounted is turned off, the temperature of most components of the vehicle is sufficiently high to the same level as the surrounding temperature. In the case of restarting after cooling, the technology of the Elpia through the injector detects the leakage of fuel and the method of subsequent processing according to the leakage.

엘피아이 엔진이 탑재된 차량의 가장 큰 문제점 중의 하나는 엔진의 시동이 오프된 상태에서 연료라인에 있던 연료가 인젝터를 통해 누출되는 것이다.One of the biggest problems with vehicles equipped with Elpia engines is that fuel in the fuel line leaks through the injector while the engine is off.

상기와 같이 연료가 인젝터를 통해 누출되게 되면, 연소실 내의 농후한 연료에 의해 시동 초기에 과도한 배기유해물질이 배출되거나 심한 경우 엔진의 시동이 걸리지 않게 되며, 연소실 외부로 누출된 연료는 공기와 섞여서 발화의 위험도 있다.When the fuel is leaked through the injector as described above, excessive exhaust harmful substances are discharged at the initial stage of starting by the rich fuel in the combustion chamber or the engine is not started in severe cases, and the fuel leaked outside the combustion chamber is mixed with air to ignite. There is also a risk.

따라서, 엘피아이 엔진에서 인젝터를 통한 연료의 누출이 있었는지의 여부와 그 누기에 따른 대책이 엘피아이 엔진이 탑재된 차량에서는 매우 중요한 기술적 과 제이다.Therefore, whether or not there is a leak of fuel through the injector in the engine is an important technical issue in vehicles equipped with the engine.

본 발명은 상기한 바와 같은 필요성에 의해 안출된 것으로서, 종래의 엘피아이 엔진의 연료공급장치들의 구성을 그대로 채용하고 추가의 부품이 필요하지 않으면서도, 엔진의 시동 오프 상태 동안에 연료가 인젝터를 통해 누기되었는지의 여부를 검출 및 확인하고, 그 누기량에 따라 엔진을 제어하는 방법을 선택적으로 달리 구성함에 의해 원활하고 안정된 엔진의 시동 및 차량의 사용이 가능하도록 한 엘피아이 차량의 누기 확인 및 처리방법을 제공함에 그 목적이 있다.SUMMARY OF THE INVENTION The present invention has been made by the above-described necessity, in which fuel is leaked through an injector during an engine start-off state while adopting the configuration of the fuel supply devices of the conventional ELPIA as it is and no additional parts are required. The method of detecting and checking whether the engine is leaked, and selectively configuring the method of controlling the engine according to the amount of leakage, allows Elpia to check and handle the leakage of the vehicle so that the engine can be started smoothly and stably. The purpose is to provide.

상기한 바와 같은 목적을 달성하기 위하여 안출된 본 발명 엘피아이 차량의 누기 확인 및 처리방법은Leak confirmation and processing method of the present invention Elpia vehicle to achieve the object as described above

연료라인의 온도와 압력을 측정하는 측정단계와;Measuring the temperature and pressure of the fuel line;

온도에 따른 연료의 포화증기압 관계로부터, 상기 측정된 압력에 따른 연료탱크의 압력을 계산하는 압력계산단계와;A pressure calculation step of calculating a pressure of the fuel tank according to the measured pressure from the saturation vapor pressure relationship of the fuel according to the temperature;

상기 계산된 연료탱크의 압력과 상기 측정된 연료라인의 압력으로부터 압력차를 구하는 압력차계산단계와;Calculating a pressure difference from the pressure of the fuel tank and the measured pressure of the fuel line;

상기 압력차계산단계에서 구해진 압력차의 크기에 따라 연료의 누기를 확인하는 누기확인단계;A leak checking step of checking leakage of fuel according to the magnitude of the pressure difference obtained in the pressure difference calculating step;

를 포함하여 구성된 것을 특징으로 한다.Characterized in that configured to include.

상기 누기확인단계에 의해 판단된 누기의 정도에 따라, 엔진의 시동 초기 인젝터의 인젝션 정지를 단계별로 수행하도록 하는 인젝션제어단계를 더 포함하여 구성할 수 있다.According to the degree of leakage determined by the leakage checking step, the injection control step of performing the injection stop of the start-up injector of the engine step by step may be configured to further comprise.

상기 누기확인단계에서 판단된 누기의 정도에 따라 운전자에게 연료의 누기 상황을 알리는 경고단계를 더 포함하여 구성할 수 있다.The vehicle may further include a warning step of notifying the driver of the fuel leakage situation according to the degree of leakage determined in the leakage checking step.

상기 압력차계산단계 이후, 상기 압력차에 따라 연료의 누기량을 계산하는 누기량계산단계를 더 포함하여 구성되고;After the pressure difference calculation step, the leakage amount calculation step of calculating the amount of leakage of fuel in accordance with the pressure difference is further configured;

상기 누기확인단계는 상기 압력차에 따라 계산된 연료의 누기량의 크기에 따라 연료의 누기를 판단하도록 구성될 수 있다.The leakage checking step may be configured to determine the leakage of fuel according to the magnitude of the leakage amount of the fuel calculated according to the pressure difference.

차량이 이전 작동시로부터 충분한 시간이 경과한 후 시동이 걸린 경우인지를 판단하여 상기 측정단계를 수행하도록, 상기 측정단계 이전에 작동조건을 확인하는 작동조건확인단계를 더 포함하여 구성될 수 있다.The vehicle may further include an operation condition checking step of confirming an operating condition before the measuring step so as to determine whether the vehicle is started after sufficient time has elapsed since the previous operation.

본 발명은 종래의 엘피아이 엔진의 연료공급장치들의 구성을 그대로 채용하고 추가의 부품이 필요하지 않으면서도, 엔진의 시동 오프 상태 동안에 연료가 인젝터를 통해 누기되었는지의 여부를 검출 및 확인하고, 그 누기량에 따라 엔진을 제어하는 방법을 선택적으로 달리 구성함에 의해 원활하고 안정된 엔진의 시동 및 차량의 사용이 가능하도록 한다.The invention detects and confirms whether fuel has leaked through the injector during the engine start-off state while still adopting the configuration of the fuel supply devices of the conventional Elpia engine and without requiring any additional parts. By selectively configuring the method of controlling the engine according to the skill, it is possible to start the engine smoothly and stably and to use the vehicle.

본 발명은 기본적으로 도 1에 도시된 바와 같은 구성의 엘피아이 연료 공급 장치에 적용되는 것으로서, 연료탱크(1)로부터 멀티밸브(3)를 통과하여 연료라인(5)을 통해 인젝터(7)로 연료가 공급되도록 되어 있고, 상기 연료가 인젝터(7)로 공급되는 연료라인(5) 상에는 셧오프밸브(9)가 설치되어 연료공급이 중단된 상태에서 연료를 차단할 수 있도록 하고, 연료라인(5)을 흐르는 연료의 온도를 측정할 수 있는 온도센서(11)가 구비되어 있다.The present invention is basically applied to the fuel supply device Elpia of the configuration as shown in Figure 1, passing through the multi-valve 3 from the fuel tank 1 to the injector 7 through the fuel line (5) A fuel is supplied, and a shutoff valve 9 is installed on the fuel line 5 through which the fuel is supplied to the injector 7 so that the fuel can be shut off while the fuel supply is stopped. There is provided a temperature sensor 11 that can measure the temperature of the fuel flowing.

상기 인젝터(7)로부터 연료탱크(1)로 복귀하는 연료의 연료라인(5)에는 압력레귤레이터(13)가 설치되어 인젝터(7)에서 요구하는 연료의 압력을 형성해줄 수 있도록 하며, 상기 압력레귤레이터(13)에는 압력센서(15)가 구비되어 연료라인(5)의 압력을 측정할 수 있도록 되어 있고, 상기 연료탱크(1)에는 체크밸브(17)가 구비되어 있어서 연료탱크(1)로부터 연료가 역류하지 못하도록 구성되어 있다.A pressure regulator 13 is installed in the fuel line 5 of the fuel returning from the injector 7 to the fuel tank 1 so as to form a pressure of the fuel required by the injector 7, and the pressure regulator 13, a pressure sensor 15 is provided to measure the pressure of the fuel line 5, and the fuel tank 1 is provided with a check valve 17 so that fuel from the fuel tank 1 can be measured. Is configured to prevent backflow.

도 2는 상기한 바와 같은 엘피아이 연료 공급 장치를 기본으로 한 본 발명에 따른 엘피아이 차량의 누기 확인 및 처리방법을 도시한 것으로서, 연료라인(5)의 온도(Tr)와 압력(Pr)을 측정하는 측정단계(S101)와; 온도에 따른 연료의 포화증기압 관계로부터, 상기 측정된 압력에 따른 연료탱크(1)의 압력(Pt)을 계산하는 압력계산단계(S102)와; 상기 계산된 연료탱크(1)의 압력(Pt)과 상기 측정된 연료라인(5)의 압력(Pr)으로부터 압력차(PI)를 구하는 압력차계산단계(S103)와; 상 기 압력차계산단계(S103)에서 구해진 압력차(PI)의 크기에 따라 연료의 누기를 확인하는 누기확인단계(S104)를 포함하여 구성된다.FIG. 2 illustrates a method for checking and treating leakage of an Elpia vehicle according to the present invention based on the Elpia fuel supply apparatus as described above, and shows the temperature Tr and the pressure Pr of the fuel line 5. Measuring step (S101) to measure; A pressure calculation step (S102) of calculating a pressure Pt of the fuel tank 1 according to the measured pressure from the saturation vapor pressure relationship of the fuel according to the temperature; A pressure difference calculation step (S103) of obtaining a pressure difference (PI) from the calculated pressure (Pt) of the fuel tank (1) and the measured pressure (Pr) of the fuel line (5); It comprises a leakage check step (S104) for confirming the leakage of the fuel in accordance with the magnitude of the pressure difference (PI) obtained in the pressure difference calculation step (S103).

또한, 상기 누기확인단계(S104)에 의해 판단된 누기의 정도에 따라, 엔진의 시동 초기 인젝터(7)의 인젝션 정지를 단계별로 수행하도록 하는 인젝션제어단계(S105)가 구비되며, 상기 누기확인단계(S104)에서 판단된 누기의 정도에 따라 운전자에게 연료의 누기 상황을 알리는 경고단계(S106)를 더 포함하여 구성된다.In addition, according to the degree of leakage determined by the leakage check step (S104), an injection control step (S105) for performing the injection stop of the starting initial injector 7 of the engine step by step is provided, the leakage check step According to the degree of leakage determined in step (S104) is configured to further include a warning step (S106) of notifying the driver of the fuel leakage situation.

또한, 차량이 이전 작동시로부터 충분한 시간이 경과한 후 시동이 걸린 경우인지를 판단하여 상기 측정단계(S101)를 수행하도록, 상기 측정단계(S101) 이전에 작동조건을 확인하는 작동조건확인단계(S100)를 더 포함하고 있다.In addition, the operation condition checking step of confirming the operating conditions before the measuring step (S101) to determine if the vehicle is started after a sufficient time has elapsed from the previous operation to perform the measuring step (S101) ( S100) is further included.

물론, 상기 작동조건확인단계(S100)에서는 이외에 더 확인할 필요가 있는 조건이 있다면 본 발명의 제어를 수행하기 전에, 요구되는 필요한 조건을 추가로 확인하도록 할 수 있을 것이다.Of course, if there is a condition that needs to be checked in addition to the operation condition checking step (S100), before performing the control of the present invention, it will be possible to further check the required conditions required.

상기 압력계산단계(S102)에서는 측정된 연료라인(5)의 압력(Pr)으로 연료탱크(1)의 압력(Pt)을 계산하는데, 이것은 기본적으로 연료라인(5)과 연료탱크(1)의 온도가 같다는 것을 전제로 한 것으로서, 차량이 지난 번 작동 후 충분한 시간이 경과하여 연료라인(5)과 연료탱크(1)의 온도는 같게 되었다는 것을 전제로 하고 있는 것이다.In the pressure calculation step (S102), the pressure Pt of the fuel tank 1 is calculated from the measured pressure Pr of the fuel line 5, which is basically the fuel line 5 and the fuel tank 1. It is assumed that the temperature is the same, and that the temperature of the fuel line 5 and the fuel tank 1 becomes equal after sufficient time has passed since the vehicle was last operated.

따라서, 상기한 바와 같은 작동조건확인단계(S100)를 두어 이를 확인한 후 연료라인(5)의 온도와 압력을 측정하는 후속의 단계를 진행하도록 하는 것이 바람직할 것이다.Therefore, it would be desirable to have the operation condition checking step (S100) as described above and then proceed to the subsequent step of measuring the temperature and pressure of the fuel line (5).

상기 연료탱크(1)의 압력을 계산하는 압력계산단계(S102)에서는 연료의 부탄비율이 고려된 온도에 따른 포화증기압 곡선으로부터, 상기 측정된 온도에 상응하는 압력(Pt)이 계산되도록 한다.In the pressure calculation step (S102) of calculating the pressure of the fuel tank 1, the pressure Pt corresponding to the measured temperature is calculated from the saturated steam pressure curve according to the temperature at which the butane ratio of the fuel is considered.

상기와 같이 계산된 연료탱크(1)의 압력과 연료라인(5)의 측정된 압력의 압력차(PI)가 발생한다는 것은 연료라인(5)의 연료가 인젝터(7)로 누출되었음을 의미하는 것이므로, 상기 압력차계산단계(S103)에서 압력차(PI)를 계산하여 그 크기에 따라 상기 누기확인단계(S104)를 통해 연료의 누기를 확인한다.The occurrence of the pressure difference PI between the pressure of the fuel tank 1 and the measured pressure of the fuel line 5 as calculated above means that the fuel of the fuel line 5 has leaked into the injector 7. In the pressure difference calculation step S103, the pressure difference PI is calculated and the leakage of the fuel is checked through the leakage checking step S104 according to the magnitude.

즉, 도 1에서 압력차(PI)가 1차목표치보다 작으면 연료라인(5)의 연료가 거의 누출되지 않은 수준으로 판단하여 정상상태로 파악하고 정상적인 인젝션으로 엔진을 시동하도록 하고, 계산된 압력차(PI)가 1차목표치보다 크거나 같고 2차목표치보다 작은 경우에는 누기1단계로 파악하여 인젝션정지1단계를 적용하는 것이다.That is, in FIG. 1, when the pressure difference PI is smaller than the primary target value, it is determined that the fuel in the fuel line 5 is almost not leaked, is determined as a normal state, and the engine is started with a normal injection, and the calculated pressure If the PI is greater than or equal to the first target value and less than the second target value, it is regarded as the first stage of leakage and the injection stop stage 1 is applied.

여기서 인젝션정지1단계는 후술하는 인젝션정지2단계 및 인젝션정지3단계와 일련의 관계를 이루는 것으로서, 단계가 높아질수록 인젝션정지의 정도를 크게 하도록 함을 의미한다.In this case, the injection stop step 1 has a series of relationships with the injection stop step 2 and the injection stop step 3 to be described later, which means that the degree of injection stop increases as the step increases.

상기 압력차(PI)가 2차목표치보다도 크거나 같고 3차목표치보다 작은 경우에는 누기2단계로 파악하고 그에 따라 인젝션정지2단계를 수행하고, 압력차(PI)가 3차목표치보다도 큰 경우에는 누기3단계로 파악하고 인제션정지3단계를 수행하며, 이 경우에는 운전자가 이 상황을 알 수 있도록 상기 경고단계(S106)를 수행하여 계 기판의 경고등을 점등하거나 경보음을 출력하는 등의 조치를 취하도록 하는 것이다.When the pressure difference PI is greater than or equal to the second target value and smaller than the third target value, the pressure difference PI is determined as the second stage of leakage, and accordingly, the injection stop second stage is performed. When the pressure difference PI is larger than the third target value, In this case, the warning step (S106) is performed to turn on the warning lamp of the meter board or output an alarm sound so that the driver knows the situation. To take.

상기와 같은 인젝션정지1단계 내지 인젝션정지3단계에 의해 차등하여 인젝션이 금지된 후 정상적인 인젝션이 이루어지면서 시동이 이루어지도록 하면, 누기된 연료량이 커질수록 인젝션을 정지하는 제어량이 커지므로, 연소실의 과도한 연료상태를 그 정도에 따라 적절히 방지하여 비교적 원활하고 안정된 엔진의 시동이 가능하도록 하고, 배기유해물질의 양을 크게 저감시킬 수 있게 된다.When the injection is prohibited after the injection is prohibited by the injection stop step 1 to the injection stop step 3 as described above, the control amount of stopping the injection increases as the amount of fuel leaked increases. By appropriately preventing the fuel condition according to the degree, it is possible to start the engine relatively smoothly and stably, and it is possible to greatly reduce the amount of the harmful emissions.

도 3은 본 발명의 다른 실시예를 도시한 순서도로서, 다른 구성은 동일하되, 상기 압력차계산단계(S103) 이후, 상기 압력차(PI)에 따라 연료의 누기량(G)을 계산하는 누기량계산단계(S200)를 더 포함하여 구성되고, 상기 누기확인단계(S104)는 상기 압력차(PI)에 따라 계산된 연료의 누기량(G)의 크기에 따라 연료의 누기를 판단하도록 된 것이다.Figure 3 is a flow chart showing another embodiment of the present invention, the other configuration is the same, but after the pressure difference calculation step (S103), the leakage of the fuel (G) is calculated according to the pressure difference (PI) It further comprises a capacity calculation step (S200), the leakage check step (S104) is to determine the leakage of the fuel in accordance with the magnitude of the leakage amount (G) of the fuel calculated according to the pressure difference (PI). .

즉, 상기 누기확인단계(S104)의 수행을 압력차(PI) 자체로 수행하는 것이 아니라, 그 압력차(PI)에 따라 계산된 연료의 누기량(G)의 크기에 따라 수행하도록 한 것이다.That is, the leakage checking step S104 is not performed by the pressure difference PI itself, but is performed according to the magnitude of the leakage amount G of the fuel calculated according to the pressure difference PI.

이외의 구성과 그에 따른 효과는 상기한 실시예와 거의 동일하므로 자세한 설명은 생략한다.Since other configurations and the effects thereof are almost the same as those of the above-described embodiment, detailed description thereof will be omitted.

도 1은 본 발명이 적용되는 엘피아이엔진의 연료 공급 장치를 예시한 도면,1 is a diagram illustrating a fuel supply apparatus of an Elpia engine to which the present invention is applied;

도 2는 본 발명에 따른 엘피아이 차량의 누기 확인 및 처리방법을 도시한 순서도,2 is a flowchart illustrating a method of checking and processing a leak of an Elpia vehicle according to the present invention;

도 3은 본 발명의 다른 실시예를 예시한 도면이다.3 is a diagram illustrating another embodiment of the present invention.

<도면의 주요 부분에 대한 부호의 간단한 설명><Brief description of symbols for the main parts of the drawings>

1; 연료탱크 3; 멀티밸브One; Fuel tank 3; Multi valve

5; 연료라인 7; 인젝터5; Fuel line 7; Injector

9; 셧오프밸브 11; 온도센서9; Shutoff valve 11; temperature Senser

13; 압력레귤레이터 15; 압력센서13; Pressure regulator 15; Pressure sensor

17; 체크밸브 S101; 측정단계17; Check valve S101; Measurement stage

S102; 압력계산단계 S103; 압력차계산단계S102; Pressure calculation step S103; Pressure difference calculation step

S104; 누기확인단계 S105; 인젝션제어단계S104; A leak checking step S105; Injection Control Stage

S106; 경고단계 S100; 작동조건확인단계S106; Warning step S100; Operation condition check step

Claims (5)

연료라인의 온도와 압력을 측정하는 측정단계와;Measuring the temperature and pressure of the fuel line; 온도에 따른 연료의 포화증기압 관계로부터, 상기 측정된 압력에 따른 연료탱크의 압력을 계산하는 압력계산단계와;A pressure calculation step of calculating a pressure of the fuel tank according to the measured pressure from the saturation vapor pressure relationship of the fuel according to the temperature; 상기 계산된 연료탱크의 압력과 상기 측정된 연료라인의 압력으로부터 압력차를 구하는 압력차계산단계와;Calculating a pressure difference from the pressure of the fuel tank and the measured pressure of the fuel line; 상기 압력차계산단계에서 구해진 압력차의 크기에 따라 연료의 누기를 확인하는 누기확인단계;A leak checking step of checking leakage of fuel according to the magnitude of the pressure difference obtained in the pressure difference calculating step; 를 포함하여 구성된 것을 특징으로 하는 엘피아이 차량의 누기 확인 및 처리방법.Leak confirmation and processing method of the vehicle Elpia, characterized in that configured to include. 청구항 1에 있어서,The method according to claim 1, 상기 누기확인단계에 의해 판단된 누기의 정도에 따라, 엔진의 시동 초기 인젝터의 인젝션 정지를 단계별로 수행하도록 하는 인젝션제어단계를 더 포함하여 구성된 것According to the degree of leakage determined by the leak check step, the injection control step of performing the injection stop of the injector initial injector of the engine step by step further comprises 을 특징으로 하는 엘피아이 차량의 누기 확인 및 처리방법.Checking and processing the leakage of the Elpia vehicle, characterized in that. 청구항 2에 있어서,The method according to claim 2, 상기 누기확인단계에서 판단된 누기의 정도에 따라 운전자에게 연료의 누기 상황을 알리는 경고단계를 더 포함하여 구성된 것It further comprises a warning step of notifying the driver of the fuel leakage situation in accordance with the degree of leakage determined in the leakage check step 을 특징으로 하는 엘피아이 차량의 누기 확인 및 처리방법.Checking and processing the leakage of the Elpia vehicle, characterized in that. 청구항 1에 있어서,The method according to claim 1, 상기 압력차계산단계 이후, 상기 압력차에 따라 연료의 누기량을 계산하는 누기량계산단계를 더 포함하여 구성되고;After the pressure difference calculation step, the leakage amount calculation step of calculating the amount of leakage of fuel in accordance with the pressure difference is further configured; 상기 누기확인단계는 상기 압력차에 따라 계산된 연료의 누기량의 크기에 따라 연료의 누기를 판단하도록 된 것 The leakage checking step is to determine the leakage of fuel in accordance with the magnitude of the leakage amount of the fuel calculated according to the pressure difference. 을 특징으로 하는 엘피아이 차량의 누기 확인 및 처리방법.Checking and processing the leakage of the Elpia vehicle, characterized in that. 청구항 1 내지 4항 중 어느 한 항에 있어서,The method according to any one of claims 1 to 4, 차량이 이전 작동시로부터 충분한 시간이 경과한 후 시동이 걸린 경우인지를 판단하여 상기 측정단계를 수행하도록, 상기 측정단계 이전에 작동조건을 확인하는 작동조건확인단계를 더 포함하여 구성된 것And further comprising an operation condition checking step of confirming an operating condition before the measuring step to determine whether the vehicle has been started after sufficient time has elapsed since the previous operation. 을 특징으로 하는 엘피아이 차량의 누기 확인 및 처리방법. Checking and processing the leakage of the Elpia vehicle, characterized in that.
KR1020080119083A 2008-11-27 2008-11-27 How to check and handle the leakage of Elpia's vehicle KR101054046B1 (en)

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