KR100589170B1 - A control method for fuel leak of LPI engine - Google Patents

A control method for fuel leak of LPI engine Download PDF

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KR100589170B1
KR100589170B1 KR1020030100321A KR20030100321A KR100589170B1 KR 100589170 B1 KR100589170 B1 KR 100589170B1 KR 1020030100321 A KR1020030100321 A KR 1020030100321A KR 20030100321 A KR20030100321 A KR 20030100321A KR 100589170 B1 KR100589170 B1 KR 100589170B1
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engine
state
hot
vehicle
start key
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KR1020030100321A
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Korean (ko)
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KR20050070597A (en
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강대진
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현대자동차주식회사
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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
    • F02D19/06—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 pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
    • F02D19/0639—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 pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels
    • F02D19/0642—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 pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels at least one fuel being gaseous, the other fuels being gaseous or liquid at standard conditions
    • F02D19/0647—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 pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels at least one fuel being gaseous, the other fuels being gaseous or liquid at standard conditions the gaseous fuel being liquefied petroleum gas [LPG], liquefied natural gas [LNG], compressed natural gas [CNG] or dimethyl ether [DME]
    • 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
    • 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)
  • Oil, Petroleum & Natural Gas (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

본 발명은 LPI 엔진의 연료누출 제어 방법으로서, 각 단계는 차량의 시동 키 온 확인 단계; 엔진 ECU에서의 핫 소킹(hot soaking) 상태여부 판단 단계; 상기 단계에서 차량의 핫 소킹 상태인 경우 엔진 ECU에서 연료 누출에 의한 버닝(burning) 제어 단계; 상기 단계에서 연료 누출에 의한 버닝제어 적용이 이루어진 후 엔진 운전상태에 따른 각 기통별 연료분사 및 점화제어 단계; 상기 단계에서 엔진 운전상태에 따른 연료분사 및 점화제어가 이루어진 후 엔진의 핫 상태에서 시동 키 오프여부를 판단하는 단계; 및 상기 단계에서 판단 결과, 엔진의 핫 상태에서의 시동 키 오프인 경우 엔진의 핫 상태에서의 시동 오프상태를 저장한 후 상기 차량의 시동 키 온 확인 단계로의 리턴단계로 이루어진다. The present invention provides a fuel leakage control method for an LPI engine, each step comprising: checking a start key on a vehicle; Determining whether a hot soaking state is present in the engine ECU; A burning control step caused by fuel leakage in the engine ECU when the vehicle is in the hot soaking state; A fuel injection and ignition control step for each cylinder according to the engine operating state after the burning control is applied by the fuel leakage in the step; Determining whether the start key is turned off in the hot state of the engine after the fuel injection and ignition control are performed according to the engine operating state in the step; And as a result of the determination in the above step, when the start key is off in the hot state of the engine, storing the start off state in the hot state of the engine, and then returning to the start key on confirmation phase of the vehicle.

LPI 엔진, 누출(leak), LPG 가스, 핫 소킹(hot soaking), 인젝터 LPI engine, leak, LPG gas, hot soaking, injector

Description

엘피아이 엔진의 연료누출 제어 방법 {A control method for fuel leak of LPI engine}{A control method for fuel leak of LPI engine}

도 1은 본 발명에 따른 연료누출 제어 적용구간 설명을 위한 그래프. 1 is a graph for explaining the fuel leakage control application section according to the present invention.

도 2는 본 발명에 따른 시스템의 개략적인 구성도. 2 is a schematic structural diagram of a system according to the present invention;

도 3은 본 발명에 따른 연료누출 제어 방법 흐름도. 3 is a flow chart illustrating a fuel leakage control method according to the present invention.

<도면부호의 설명><Description of Drawing>

2 냉각수온센서신호 4 공기온센서신호2 Coolant temperature sensor signal 4 Air temperature sensor signal

6 시동 온 신호 8 크랭크회전수센서신호6 Start-on signal 8 Crank speed sensor signal

10 캠회전수센서신호 20 엔진 ECU10 Cam RPM sensor signal 20 Engine ECU

30 인젝터 40 점화코일 30 Injector 40 Ignition Coil

본 발명은 LPI(Liquefied Petroleum Injection) 엔진의 연료누출 제어 방법에 관한 것으로서, 보다 구체적으로는 LPI 엔진의 연료누출을 제어하기 위해 차량의 엔진을 핫(hot) 상태에서 시동 오프 그리고, 시간지연(soaking) 후 시동시 엔진에 누출되어 써지탱크나 연소실에 남아 있는 LPG 가스를 버닝(burning)하는 방법으 로 엔진 시동시 시동성향상 및 배기가스를 저감시킬 수 있도록 한 LPI 엔진의 연료누출 제어 방법에 관한 것이다. The present invention relates to a fuel leakage control method of a liquefied petroleum injection (LPI) engine, and more specifically, to control the fuel leakage of an LPI engine, starting the engine of a vehicle in a hot state, and delaying the time. A method of controlling the fuel leakage of an LPI engine which improves the starting performance and reduces the exhaust gas when starting the engine by burning LPG gas remaining in the surge tank or combustion chamber after leaking to the engine at the start. .

일반적으로, LPI 엔진은 액화 저장되어 있는 가스를 엔진에 기체상태로 공기와 같이 유입시키는 것이 아니라, 가솔린 엔진과 동일한 방법으로 연료탱크로부터 연료펌프를 이용해 공급되는 액체 연료 그대로 인젝터를 통해 액체상태로 분사시키는 구조로 이루어져 있다. In general, the LPI engine does not inject liquefied gas into the engine as air in the gas state, but injects the liquid fuel into the liquid state through the injector as it is supplied by the fuel pump from the fuel tank in the same way as a gasoline engine It consists of a structure.

상기 LPI 엔진의 핫 소킹(hot soaking)시 인젝터의 팁(tip)부위에서의 연료 누출(leak)이 발생한다. 이러한 엔진의 핫 상태에서 시동이 오프되고 시간지연 후 시동시 누출된 연료로 인해 시동성불량 및 LPI 엔진관련 배기가스가 과다하게 발생되는 문제점이 있다. Fuel leakage occurs at the tip of the injector during hot soaking of the LPI engine. In the hot state of the engine, there is a problem in that start-up failure and excessive LPI engine-related exhaust gas are generated due to fuel leaked at start-up after a time delay.

이에, 본 발명의 출원인은 LPI 엔진의 연료누출 방지의 필요성을 느껴 본 발명을 제안하게 된 것이다. Accordingly, the applicant of the present invention feels the need for fuel leakage prevention of the LPI engine to propose the present invention.

본 발명은 상기 종래기술의 문제점을 해결하기 위해 안출된 것으로서, 본 발명의 목적은 LPI 엔진의 연료누출을 제어하기 위해 차량의 엔진을 핫(hot) 상태에서 시동 오프 그리고, 시간지연(soaking) 후 시동시 엔진에 누출되어 써지탱크나 연소실에 남아 있는 LPG 가스를 버닝(burning)하는 방법으로 엔진 시동시 시동성향상 및 배기가스를 저감시킬 수 있도록 한 LPI 엔진의 연료누출 제어 방법을 제공하는 것이다. The present invention has been made to solve the problems of the prior art, an object of the present invention is to start off the engine of the vehicle in the hot (hot) state to control the fuel leakage of the LPI engine, and after the time delay (soaking) It is to provide a method of controlling fuel leakage of an LPI engine that improves starting characteristics and reduces exhaust gas when starting the engine by burning LPG gas remaining in the surge tank or combustion chamber due to leakage of the engine at start-up.

상기 목적을 이루기 위한, 본 발명에 따른 연료누출 제어 방법은 In order to achieve the above object, the fuel leakage control method according to the present invention                         

차량의 시동 키 온 확인 단계; Checking a start key on the vehicle;

엔진 ECU에서의 핫 소킹(hot soaking) 상태여부 판단 단계; Determining whether a hot soaking state is present in the engine ECU;

상기 단계에서 차량의 핫 소킹 상태인 경우 엔진 ECU에서 연료 누출에 의한 버닝(burning) 제어 단계; A burning control step caused by fuel leakage in the engine ECU when the vehicle is in the hot soaking state;

상기 단계에서 연료 누출에 의한 버닝제어 적용이 이루어진 후 엔진 운전상태에 따른 각 기통별 연료분사 및 점화제어 단계; A fuel injection and ignition control step for each cylinder according to the engine operating state after the burning control is applied by the fuel leakage in the step;

상기 단계에서 엔진 운전상태에 따른 연료분사 및 점화제어가 이루어진 후 엔진의 핫 상태에서 시동 키 오프여부를 판단하는 단계; 및 Determining whether the start key is turned off in the hot state of the engine after the fuel injection and ignition control are performed according to the engine operating state in the step; And

상기 단계에서 판단 결과, 엔진의 핫 상태에서의 시동 키 오프인 경우 엔진의 핫 상태에서의 시동 오프상태를 저장한 후 상기 차량의 시동 키 온 확인 단계로의 리턴단계로 이루어진다. As a result of the determination in the above step, when the start key is turned off in the hot state of the engine, the start-off state is stored in the hot state of the engine and then returned to the start key on confirmation step of the vehicle.

<개요><Overview>

본 발명은 LPI 엔진의 연료누출을 제어하기 위해 엔진을 핫(hot) 상태에서 시동 오프 그리고, 시간지연(soaking) 후 시동시 엔진에 누출되어 남아 있는 LPG 가스를 버닝(burning)하는 방법으로 엔진 시동시 시동성향상 및 배기가스를 저감시킨 LPI 엔진의 연료누출 제어 방법이다. The present invention starts the engine by a method of starting the engine in a hot state to control the fuel leakage of the LPI engine, and burning the remaining LPG gas at the engine when starting after a time delay. It is a fuel leakage control method of LPI engine with improved start-up performance and reduced exhaust gas.

본 발명에 따른 제어 방법은 도 1에 도시된 바와 같이, 스타트모터에 의한 엔진 회전구간인 "A"구간에서 적용된다. 즉, "A"구간에서 연료누출에 따른 버닝(burning) 제어가 이루어지는 것이다. 한편, 스타트모터 비작동구간인 "B"구간 에서는 통상적인 엔진회전수에 따른 연료분사 및 점화제어가 이루어진다. As shown in FIG. 1, the control method according to the present invention is applied in an “A” section, which is an engine rotation section by a start motor. That is, burning control according to fuel leakage is performed in section "A". On the other hand, in the "B" section, which is the start motor non-operation section, fuel injection and ignition control are performed according to the normal engine speed.

이하, 도면을 참조하여 본 발명에 따른 바람직한 실시예를 설명한다. Hereinafter, with reference to the drawings will be described a preferred embodiment according to the present invention.

<실시예><Example>

시스템system

본 발명의 실시예에 따른 LPI 엔진의 연료누출을 제어하기 위한 개략적인 시스템 구성은 도 2와 같다. 2 is a schematic system configuration for controlling the fuel leakage of the LPI engine according to an embodiment of the present invention.

도 2에 도시된 바와 같이, 엔진 ECU(20)에서는 시동 온 신호(6)와 공기온센서 신호(4)와 냉각수온센서 신호(2)를 이용하여 엔진의 핫 소킹타임(hot soaking time)을 계산한다. 즉, 엔진의 핫 상태 후 지연된 시간을 계산한다. As shown in FIG. 2, the engine ECU 20 uses the start on signal 6, the air temperature sensor signal 4, and the coolant temperature sensor signal 2 to determine a hot soaking time of the engine. Calculate That is, the delayed time after the hot state of the engine is calculated.

상기에서, 차량의 hot soaking 상태를 만족하는 경우 연료량을 점화시켜 연료누출에 의한 잔류 가스를 태운다(burning). 이 때, 연료분사는 이루어지지 않는다. 본 발명에 따른 상기 연료누출에 의한 버닝(burning) 제어 방법은 크랭크회전수센서 신호(8)를 이용한 각 기통별 점화제어를 통해 잔류 가스를 버닝(burning) 시킨다. 이러한, 상기 버닝(burning) 구간 설정은 차량의 시동시 스타트모터에 의한 엔진 회전구간으로 설정한다(도 1의 "A"구간). In the above, when the hot soaking state of the vehicle is satisfied, the amount of fuel is ignited to burn residual gas due to fuel leakage. At this time, fuel injection is not performed. The burning control method by the fuel leakage according to the present invention burns the residual gas through the ignition control for each cylinder using the crank speed sensor signal (8). The burning section is set to the engine rotation section by the start motor at the start of the vehicle (section “A” in FIG. 1).

또한, 상기에서 본 발명의 버닝(burning) 제어 적용 후에는 엔진 ECU에서 시동 후의 엔진 운전상태에 따른 각 기통별 연료분사가 인젝터(30)를 통해 이루어지고 점화코일(40)의 점화제어가 이루어진다. In addition, after the burning (burning) control of the present invention is applied to the fuel injection for each cylinder according to the engine operating state after starting in the engine ECU through the injector 30 and the ignition control of the ignition coil 40 is made.

한편, 상기에서 스타트모터의 비작동구간에서는 캠회전수센서 신호(10)를 통 한 엔진 ECU에서 인젝터 분사시기 및 분사시간을 계산하여 엔진 운전상태에 따른 각 기통별 연료분사 및 점화제어가 이루어지는 것을 특징으로 한다. On the other hand, in the non-operational section of the start motor in the injector injection timing and injection time in the engine ECU via the cam speed sensor signal 10 to calculate the fuel injection and ignition control for each cylinder according to the engine operating state It features.

방법Way

본 발명의 실시예에 따른 LPI 엔진의 연료누출 제어 방법을 흐름도인 도 3을 참조하여 설명한다. A fuel leakage control method of an LPI engine according to an exemplary embodiment of the present invention will be described with reference to FIG. 3.

도 3에 도시된 바와 같이, 먼저, 차량의 시동 키가 온(on) 상태인지를 확인한[S10] 후 엔진 ECU에서 차량의 핫 소킹(hot soaking) 상태여부를 판단한다[S20]. As shown in FIG. 3, first, after confirming whether the vehicle's ignition key is in an on state (S10), the engine ECU determines whether the vehicle is in a hot soaking state (S20).

본 발명에 따른 엔진 ECU에서의 핫 소킹 판단조건은 다음과 같다. The hot soaking determination condition in the engine ECU according to the present invention is as follows.

첫째, 차량의 시동 키가 온(on) 상태이고, First, the vehicle's ignition key is on

둘째, 현 rpm이 기준 rpm 이하이고, Second, the current rpm is below the reference rpm,

세째, 냉각수온과 공기온의 절대치 차가 설정된 기준값 이하이어야 한다. Third, the absolute difference between the coolant temperature and the air temperature should be less than the set reference value.

다시 도 3의 흐름도로 돌아가서, 상기 S20 단계에서의 판단 결과 차량의 핫 소킹 상태인 경우 엔진 ECU에서 연료 누출에 의한 버닝(burning) 제어가 이루어진다[S30]. Returning to the flowchart of FIG. 3 again, in the case of the hot soaking state of the vehicle as a result of the determination in step S20, burning control by fuel leakage is performed in the engine ECU [S30].

본 발명에 따른 상기 버닝(burning) 제어는 앞서 "시스템"에서 설명한 바와 같이, 크랭크회전수센서 신호를 이용한 각 기통별 연료분사는 이루어지지 않는 점화제어를 통해 잔류 가스를 버닝(burning)시키는 것이다. The burning control according to the present invention is to burn the residual gas through ignition control that does not perform fuel injection for each cylinder using the crank speed sensor signal, as described above in the "system".

상기 S30단계에서 연료 누출에 의한 버닝제어 적용이 이루어진 후에는 엔진 운전상태에 따른 각 기통별 연료분사 및 점화제어가 이루어지고[S50], 엔진 운전상 태에 따른 연료분사 및 점화제어가 이루어진 후에는 차량 엔진의 핫 상태에서 시동 키 오프여부를 판단한다[S60]. After the burning control is applied by fuel leakage in step S30, fuel injection and ignition control for each cylinder are performed according to the engine operating state [S50], and after the fuel injection and ignition control according to the engine operating state are performed. In the hot state of the vehicle engine, it is determined whether the ignition key is off [S60].

본 발명에 따른 상기 차량 엔진의 핫 상태에서의 시동 키 오프여부 판단은 시동 키가 오프(off) 상태이고, 현 냉각수온이 설정된 기준값(본 발명에서는 90℃) 이상인 것을 특징으로 한다. 즉, 상기 S60단계에서의 판단 결과, 엔진의 핫 상태에서의 시동 키 오프인 경우는 엔진의 핫 상태에서의 시동 오프상태를 저장해 두기 위한 것이고[S70], 상기 S70단계에서 엔진의 핫 상태에서의 시동 오프상태를 저장한 후에는 상기 차량의 시동 키 온 확인 단계[S10]로 리턴된다. The determination of whether the start key is turned off in the hot state of the vehicle engine according to the present invention is characterized in that the start key is in an off state and the current coolant temperature is equal to or higher than a set reference value (90 ° C in the present invention). That is, as a result of the determination in step S60, when the start key is turned off in the hot state of the engine, it is for storing the start off state in the hot state of the engine [S70]. After storing the start-off state, the process returns to the start key on confirmation step [S10] of the vehicle.

한편, 상기 S20단계에서 차량의 핫 소킹(hot soaking) 상태를 만족하지 않은 경우는 스타트모터의 비작동 구간으로서, 통상적인 엔진 시동시의 엔진 회전수에 따른 연료분사 및 점화제어가 이루어지는 것을 특징으로 한다(도 1의 "B"구간). On the other hand, when the hot soaking state of the vehicle is not satisfied in the step S20, as a non-operational section of the start motor, fuel injection and ignition control are performed according to the engine speed at the start of the engine. (Section "B" in Fig. 1).

이와같이, 본 발명에서는 차량 엔진의 핫(hot)상태에서의 시동이 오프된 경우 일정 시간지연(soaking) 후 버닝(burning) 제어 즉, 크랭크회전수센서 신호를 이용한 각 기통별로 연료분사는 이루어지지 않는 점화제어를 통한 잔류 가스의 버닝(burning)을 통해 누출로 인한 시동시 발생되는 시동성불량 및 배기가스를 저감시킬 수 있도록 하였다. As such, in the present invention, when the start of the vehicle engine is turned off, fuel injection is not performed for each cylinder using a burning control, that is, a crank speed sensor signal after a predetermined time delay. By burning residual gas through ignition control, it is possible to reduce start-up defects and exhaust gas generated at start-up due to leakage.

이상에서 바람직한 실시예를 중심으로 본 발명을 설명하였으나 본 발명의 기술적사상이 이에 한정되어 해석되어서는 아니되며, 본 발명에 따른 기술적 범위는 특허청구범위에 기재된 사항의 합리적인 해석에 의해 결정되어져야 한다. Although the present invention has been described above with reference to preferred embodiments, the technical spirit of the present invention should not be construed as being limited thereto, and the technical scope according to the present invention should be determined by reasonable interpretation of the matters described in the claims. .

본 발명의 LPI 엔진의 연료누출 제어 방법에 따르면, 시동성 향상(시동시간 단축) 및 배기가스 저감효과로 별도의 배기저감 장치가 불필요한 효과가 있다.  According to the fuel leakage control method of the LPI engine of the present invention, an additional exhaust reduction device is unnecessary due to an improvement in startability (reduced startup time) and an emission reduction effect.

Claims (7)

LPI 엔진의 연료누출 제어 방법에 있어서, In the fuel leakage control method of the LPI engine, 차량의 시동 키 온 확인 단계; Checking a start key on the vehicle; 엔진 ECU에서의 핫 소킹(hot soaking) 상태여부 판단 단계; Determining whether a hot soaking state is present in the engine ECU; 상기 단계에서 차량의 핫 소킹 상태인 경우 엔진 ECU에서 연료 누출에 의한 버닝(burning) 제어를 수행하되, 크랭크회전수센서 신호를 이용한 각 기통별 연료분사는 이루어지지 않는 점화제어를 통해 잔류 가스를 차량의 시동시 스타트모터에 의한 엔진 회전구간 동안 버닝(burning)시키는 단계; When the vehicle is in the hot soaking state, burning control is performed by fuel leakage in the engine ECU, and the residual gas is discharged through the ignition control that does not perform fuel injection for each cylinder using the crank speed sensor signal. Burning the engine during the engine rotation section by the start motor at startup; 상기 단계에서 연료 누출에 의한 버닝제어 적용이 이루어진 후 엔진 운전상태에 따른 각 기통별 연료분사 및 점화제어 단계; A fuel injection and ignition control step for each cylinder according to the engine operating state after the burning control is applied by the fuel leakage in the step; 상기 단계에서 엔진 운전상태에 따른 연료분사 및 점화제어가 이루어진 후 엔진의 핫 상태에서 시동 키 오프여부를 판단하는 단계; 및 Determining whether the start key is turned off in the hot state of the engine after the fuel injection and ignition control are performed according to the engine operating state in the step; And 상기 단계에서 판단 결과, 엔진의 핫 상태에서의 시동 키 오프인 경우 엔진의 핫 상태에서의 시동 오프상태를 저장한 후 상기 차량의 시동 키 온 확인 단계로의 리턴단계로 이루어지는 것을 특징으로 하는 엘피아이 엔진의 연료누출 제어 방법. As a result of the determination in the above step, when the start key is off in the hot state of the engine, an Elpia is configured to store the start off state in the hot state of the engine and then return to the start key on confirmation step of the vehicle. Fuel leakage control method of engine. 제 1항에 있어서, 상기 엔진 ECU에서의 핫 소킹 판단조건은, The method of claim 1, wherein the hot soaking determination condition in the engine ECU is: 차량의 시동 키가 온(on) 상태이고, 현 rpm이 기준 rpm 이하이고, 냉각수온과 공기온의 절대치 차가 설정된 기준값 이하인 것을 특징으로 하는 엘피아이 엔진의 연료누출 제어 방법.And a start key of the vehicle is on, a current rpm is less than or equal to the reference rpm, and an absolute difference between the coolant temperature and the air temperature is equal to or less than the set reference value. 삭제delete 삭제delete 제 1항에 있어서, 상기 엔진의 핫 상태에서의 시동 키 오프여부 판단은, The method of claim 1, wherein the determination of whether the start key is off in the hot state of the engine is performed. 차량의 시동 키가 오프(off) 상태이고, 현 냉각수온이 설정된 기준값 이상인 것을 특징으로 하는 엘피아이 엔진의 연료누출 제어 방법. And a start key of the vehicle is in an off state and a current coolant temperature is equal to or higher than a set reference value. 제 5항에 있어서, The method of claim 5, 상기 냉각수온의 설정 기준값은 90℃ 이상인 것을 특징으로 하는 엘피아이 엔진의 연료누출 제어 방법.The set reference value of the cooling water temperature is 90 ℃ ℃ fuel leakage control method of the engine. 제 1항에 있어서, The method of claim 1, 상기 차량의 핫 소킹(hot soaking) 상태를 만족하지 않은 경우는 스타트모터의 비작동 구간으로서, 엔진 시동시의 엔진 회전수에 따른 연료분사 및 점화제어가 이루어지는 단계가 추가로 포함되는 것을 특징으로 하는 엘피아이 엔진의 연료누출 제어 방법. When the hot soaking state of the vehicle is not satisfied, as a non-operational section of the start motor, fuel injection and ignition control according to the engine speed at the start of the engine are further included. How to control the fuel leakage of Elpia's engine.
KR1020030100321A 2003-12-30 2003-12-30 A control method for fuel leak of LPI engine KR100589170B1 (en)

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