KR20010019312A - Method for judging the end of engine starting of an electronic controlled feul injection system for a motor vehicle - Google Patents

Method for judging the end of engine starting of an electronic controlled feul injection system for a motor vehicle Download PDF

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KR20010019312A
KR20010019312A KR1019990035656A KR19990035656A KR20010019312A KR 20010019312 A KR20010019312 A KR 20010019312A KR 1019990035656 A KR1019990035656 A KR 1019990035656A KR 19990035656 A KR19990035656 A KR 19990035656A KR 20010019312 A KR20010019312 A KR 20010019312A
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South Korea
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engine
fuel injection
voltage
battery
injection system
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KR1019990035656A
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Korean (ko)
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KR100302376B1 (en
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박성서
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류정열
기아자동차 주식회사
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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
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/04—Introducing corrections for particular operating conditions
    • F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up
    • F02D41/062—Introducing corrections for particular operating conditions for engine starting or warming up for starting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D31/00—Use of speed-sensing governors to control combustion engines, not otherwise provided for
    • F02D31/001—Electric control of rotation speed
    • 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
    • F02D41/30—Controlling fuel injection
    • 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)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Abstract

PURPOSE: A deciding method for the engine starting completion of an electronic control fuel injection system is provided to improve starting trouble and to enhance starting ability by accurately deciding the starting completion. CONSTITUTION: A deciding method for an engine starting completion comprises the five steps. In the first step, fuel injection amount is controlled by a predetermined control method fitted with a starting condition. In the second step, an engine RPM is detected with outputs from a crank angle sensor. The voltage of a battery is detected in the third step and the voltage increase rate of the battery is detected in the fourth step. In the fifth step, the control for the fuel injection amount stops when the voltage and the voltage increase rate of the battery are all over each reference value. Thus, an engine starting completion is accurately decided with the voltage state of the battery as well as the engine RPM.

Description

차량용 전자제어식 연료분사시스템의 엔진시동완료 판단방법{Method for judging the end of engine starting of an electronic controlled feul injection system for a motor vehicle}Method for judging the end of engine starting of an electronic controlled feul injection system for a motor vehicle}

본 발명은 크랭크축의 각도 뿐만 아니라 배터리의 전압을 함께 고려하여 엔진의 시동완료 여부를 판단함으로써 보다 정확한 연료분사량 제어가 가능한 차량용 전자제어식 연료분사시스템의 시동완료 판단방법에 관한 것이다.The present invention relates to a method for determining the starting completion of an electronically controlled fuel injection system for a vehicle, which is capable of controlling fuel injection amount more accurately by determining whether the engine is completed by considering the crankshaft angle as well as the voltage of the battery.

일반적으로, 전자제어식 연료분사시스템은 일정한 압력으로 유지된 연료를 흡기 매니폴드 내부에 분사하는 방식이 대부분이며, 분사량의 제어는 전자식 분사밸브를 기관의 각 사이클마다 흡입 공기량에 따라 어느 시간 동안 개방시키는 간헐 분사방식이다. 즉, 분사량은 인젝터의 전기펄스의 시간으로 결정되므로 용이하면서도 고도로 정밀한 제어를 할 수 있다. 그리고, 기관의 운전 조건을 모두 전기 신호로 바꾸어 처리하므로, 적합성이 크고 수정 요소를 바로 추가할 수 있는 특징을 가지고 있다.In general, the electronically controlled fuel injection system injects fuel maintained at a constant pressure into the intake manifold, and the control of the injection amount opens the electronic injection valve for a certain time according to the amount of intake air in each cycle of the engine. Intermittent injection method. That is, since the injection amount is determined by the time of the electric pulse of the injector, easy and highly precise control can be performed. In addition, since all the operating conditions of the engine are converted into electrical signals and processed, it is highly suitable and has a feature of adding a correction element immediately.

이러한 특징을 가진 전자제어식 연료분사시스템은, 크게 연료 계통과, 흡기 계통과, 제어 계통으로 구성되어 있다.An electronically controlled fuel injection system having such characteristics is mainly composed of a fuel system, an intake system, and a control system.

연료 계통은 연료 펌프에 의해 연료를 고압으로 만들어 인젝터로 압송함과 동시에 연료의 압력을 항상 일정하게 유지하여 인젝터에서 높은 정밀도로 분사할 수 있도록 한다.The fuel system makes the fuel pressurized by the fuel pump and pumps it to the injector while maintaining a constant pressure on the fuel so that it can be injected with high precision.

흡기 계통은 드로틀 밸브의 개도에 따른 공기를 실린더로 공급하는 계통으로 흡기량 검출장치, 드로틀 밸브를 가지는 드로틀 바디, 서지 탱크 등으로 구성되어 있다.The intake system is a system for supplying air according to the opening degree of the throttle valve to a cylinder, and is composed of an intake amount detecting device, a throttle body having a throttle valve, and a surge tank.

그리고, 제어 계통은 흡입공기량, 엔진 회전수, 드로틀 밸브 개도 등을 검출하여 전기신호로 만들어 컴퓨터로 보내는 외에 수온, 흡기온 등 각종 센서들로부터의 신호에 따라 연료분사시기 및 분사량을 제어한다.In addition, the control system detects the intake air amount, the engine speed, the throttle valve opening degree, and the like to make an electrical signal and send it to a computer, and controls fuel injection timing and injection amount according to signals from various sensors such as water temperature and intake temperature.

이러한 전자제어식 연료분사시스템은, 기본적으로 흡기량 검출장치로부터 검출된 흡입 공기량에 따라 기본적인 연료분사량을 결정하고, 엔진의 회전수, 드로블 밸브의 개도, 수온, 흡기온 등, 각종 센서들로부터의 신호에 따라 연료분사량을 보정함으로써, 차량의 운전 조건에 가장 적합하도록 연료의 분사량을 제어할 수 있다.The electronically controlled fuel injection system basically determines the basic fuel injection amount according to the intake air amount detected from the intake air amount detection device, and signals from various sensors such as the engine speed, the opening of the draw valve, the water temperature, the intake air temperature, and the like. By correcting the fuel injection amount according to the above, the injection amount of the fuel can be controlled to be most suitable for the driving conditions of the vehicle.

예를 들어, 엔진의 시동시에는, 비록 별도의 스타터(starter)가 크랭크 축을 기동시키기는 하지만, 크랭크 축의 기동 토크가 크기 때문에 다른 운전 조건들에 비하여 큰 출력이 필요하다. 이를 위하여, 전자제어식 연료분사시스템은 엔진의 크랭크 축에 설치된 크랭크 각 센서로부터의 신호에 따라 엔진의 회전수를 검출하고, 검출된 엔진의 회전수가 소정치, 대략 대략 1000rpm이하인 경우, 시동 조건으로 판단하고 공연비를 농후하게 되도록 연료 분사량을 증가시킨다. 그리고 나서, 엔진의 회전수가 소정치 이상으로 높아지면 시동이 완료된 것으로 판단하여 연료 분사량을 감소시킨다.For example, at start-up of the engine, although a separate starter starts the crankshaft, a large output is required compared to other operating conditions due to the large starting torque of the crankshaft. To this end, the electronically controlled fuel injection system detects the engine speed in accordance with a signal from a crank angle sensor installed on the crankshaft of the engine, and judges it as a starting condition when the detected engine speed is less than a predetermined value, approximately 1000 rpm or less. The fuel injection amount is increased to increase the air-fuel ratio. Then, when the engine speed becomes higher than the predetermined value, it is determined that the start is completed and the fuel injection amount is reduced.

이와 같이, 종래에는 엔진의 시동 조건 판단을 엔진의 회전수로 판단하였다.As described above, in the related art, the starting condition of the engine is determined as the engine speed.

그런데, 엔진의 시동시 스타터(starter)가 엔진을 기동시키는 과정에서 크랭크 축에 기계적인 진동이 발생된다. 이러한 진동은 크랭크 각 센서의 신호에 노이즈(noise)를 유발시켜 전자제어식 연료분사시스템이 엔진의 회전수를 잘못인식할 수 있다는 문제점이 있다. 특히, 이러한 노이즈는 그 성분이 고주파 형태로서 실제보다 매우 높은 회전수로 나타나게 된다.By the way, mechanical vibration is generated in the crankshaft in the process of starting the engine by the starter when the engine is started. This vibration causes noise in the signal of the crank angle sensor, so that the electronically controlled fuel injection system may incorrectly recognize the engine speed. In particular, the noise is a high frequency form of the components appear at a much higher rotational speed than actually.

따라서, 전자제어식 연료분사 시스템은, 시동시 실제로는 엔진 회전수가 소정치 이상으로 높아지지 않았음에도 불구하고, 시동이 완료된 것으로 판단하여 연료 분사량을 감소시킴으로써, 시동이 이루어지지 않는 현상이 발생될 수 있다.Therefore, in the electronically controlled fuel injection system, even when the engine speed is not actually higher than a predetermined value at the time of starting, it may be determined that the starting is completed, thereby reducing the fuel injection amount, so that the starting may not occur. .

본 발명은 상기와 같은 문제점을 해소하고자 하는 노력에서 안출된 것으로, 보다 정확한 시동완료의 판단을 가능하게 함으로써 시동 불량을 개선하고 시동성을 향상시킬 수 있는 차량용 전자제어식 연료분사시스템의 엔진시동완료 판단방법을 제공하는데 그 목적이 있다.The present invention has been made in an effort to solve the above problems, the engine start completion determination method of the electronically controlled fuel injection system for vehicles that can improve the starting failure by enabling more accurate determination of the start-up The purpose is to provide.

도 1은 본 발명의 일 실시예에 따른 차량용 전자제어식 연료분사시스템의 엔진시동완료 판단방법을 도시한 흐름도.1 is a flowchart illustrating a method for determining engine start completion of an electronic fuel injection system for a vehicle according to an exemplary embodiment of the present invention.

도 2는 엔진의 시동시 시간의 경과에 따른 엔진의 회전수 및 배터리의 전압 변화를 도시한 그래프.Figure 2 is a graph showing the change in the number of revolutions of the engine and the voltage of the battery over time when the engine is started.

상기의 목적은, 엔진이 시동되면 시동 조건에 맞게 미리 설정된 제어 방식에 따라 연료분사량을 제어하는 제1 단계; 엔진의 크랭크 각 센서의 출력으로부터 엔진의 회전수를 검출하는 제2 단계; 배터리의 전압을 검출하는 제3 단계; 배터리의 전압 상승률을 검출하는 제4 단계; 및 제2 내지 제4 단계에서 각각 검출된 엔진의 회전수, 배터리의 전압 및 전압 상승률이 모두 미리 설정된 각각의 기준치를 초과할 경우, 엔진의 시동이 완료된 것으로 판단하고, 시동 조건에 따른 연료분사량의 제어를 중지하는 제5 단계;를 포함하는 본 발명에 따른 차량용 전자제어식 연료분사시스템의 엔진시동완료 판단방법에 의해 달성된다.The above object is the first step of controlling the fuel injection amount in accordance with a control scheme preset in accordance with the starting condition when the engine is started; A second step of detecting the engine speed from the output of the crank angle sensor of the engine; Detecting a voltage of the battery; Detecting a rate of increase of the voltage of the battery; And when the engine speed, the voltage of the battery, and the rate of increase of the voltage respectively detected in the second to fourth stages exceed respective preset thresholds, it is determined that the engine is completely started, and the fuel injection amount according to the starting condition is determined. A fifth step of stopping the control; is achieved by the engine start completion determination method of the electronically controlled fuel injection system for a vehicle according to the present invention.

여기서, 제2 단계는 크랭크 각 센서의 출력 신호로부터 크랭크축의 진동으로 인한 노이즈 성분을 제거하는 제6 단계를 더 포함한다. 이 제6 단계는 저역 필터를 이용하여 수행되는 것이 바람직하다.Here, the second step further includes a sixth step of removing noise components due to vibration of the crankshaft from the output signal of the crank angle sensor. This sixth step is preferably performed using a low pass filter.

또한, 제5 단계에서 시동이 완료된 것으로 판단되면, 소정 시간의 지연 후 상기 제6 단계는 중지된다.In addition, if it is determined that the startup is completed in the fifth step, the sixth step is stopped after a delay of a predetermined time.

이에 따르면, 엔진의 회전수 뿐만 아니라 배터리의 전압 조건도 함께 고려하기 때문에 보다 정확하게 엔진의 시동완료를 판단할 수 있다.According to this, it is possible to determine the start-up of the engine more accurately since the engine voltage as well as the engine speed are considered.

이하, 첨부된 도면을 참조하여 본 발명의 바람직한 일 실시예를 보다 상세하게 설명한다.Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

본 발명의 일 실시예에 따른 차량용 전자제어식 연료분사시스템의 엔진시동완료 판단방법이 도 1에 흐름도로서 도시되어 있다.An engine start completion determination method of an electronically controlled fuel injection system for a vehicle according to an exemplary embodiment of the present invention is shown as a flowchart in FIG. 1.

도시된 바에 따르면, 우선 운전자가 시동키를 돌려 엔진이 시동되면 전자제어식 연료분사시스템은 인젝터에서 분사되는 연료량을 시동 조건에 맞추어 제어한다(S1). 이때, 시동 조건에 따른 연료분사량의 제어는 전자제어식 연료분사시스템의 컴퓨터 내에 미리 기억된 알고리즘에 의해 수행된다.As shown, first, when the driver turns the ignition key to start the engine, the electronically controlled fuel injection system controls the amount of fuel injected from the injector according to the starting condition (S1). At this time, the control of the fuel injection amount according to the starting condition is performed by an algorithm previously stored in the computer of the electronically controlled fuel injection system.

그리고 나서, 전자제어식 연료분사시스템은 엔진의 회전수를 검출한다(S2). 엔진의 회전수는 종래의 기술에서 설명된 바와 같이, 엔진의 크랭크 각 센서의 출력값으로부터 검출된다. 따라서, 우선 엔진의 크랭크 각 센서로부터 계속적으로 크랭크 각을 검출한다(S21). 이 경우 엔진을 기동시키기 위한 스타터의 작동으로 인한 크랭크 축의 진동에 의해, 크랭크 각 센서에 고주파 성분의 노이즈가 발생된다. 그러므로, 이를 해소하기 위하여 저역 필터(low pass filter)를 사용하여 크랭크 각 센서의 출력값을 필터링하여, 노이즈 성분을 제거하는 것이 바람직하다(S22). 이렇게 필터링 된 값으로부터 엔진의 회전수를 검출한다(S23).Then, the electronically controlled fuel injection system detects the engine speed (S2). The engine speed is detected from the output value of the crank angle sensor of the engine, as described in the prior art. Therefore, first, the crank angle is continuously detected from the crank angle sensor of the engine (S21). In this case, due to vibration of the crankshaft due to the operation of the starter for starting the engine, noise of high frequency components is generated in the crank angle sensor. Therefore, in order to solve this problem, it is desirable to filter the output value of each crank sensor using a low pass filter to remove noise components (S22). The engine speed is detected from the filtered value (S23).

다음으로, 배터리의 전압 변화를 검출한다. 즉, 차량의 시동시에는 차량의 시동에 필요한 스타터와 같은 부품들의 구동에 필요한 전력을 배터리로부터 공급받게 되고, 엔진이 시동되면 이 부품들은 엔진에 의해 구동되는 올터네이터로부터 발생되는 전력을 공급받아 구동된다.Next, the voltage change of the battery is detected. That is, when the vehicle is started, power is supplied from the battery to drive components such as a starter necessary for starting the vehicle. When the engine is started, the components are driven by receiving power generated from an alternator driven by the engine. do.

따라서, 차량의 시동시 배터리의 전압은 도2에 도시된 바와 같이, 시동 초기에 급격하게 낮아졌다가 시동이 완료되면 다시 원상회복된다. 본 발명에서는 이와 같은 엔진의 시동에 따른 배터리의 전압 변화를 엔진의 시동완료를 판단하기 위한 판단 자료로 채용하기 위하여, S3 단계 및 S4 단계에서 각각 배터리의 전압과, 배터리의 전압 상승률을 검출한다. 참고로, 도 2에서 배터리의 전압 변화 곡선과 함께 도시된 다른 곡선은 엔진의 시동 후의 시간에 따른 엔진의 회전수 변화를 보인 곡선이다.Therefore, the voltage of the battery at the start of the vehicle is drastically lowered at the beginning of the startup as shown in FIG. 2, and then restored again when the startup is completed. In the present invention, in order to adopt such a change in the voltage of the battery according to the start of the engine as the determination data for determining the completion of the start of the engine, the voltage of the battery and the rate of increase of the voltage of the battery are detected in steps S3 and S4, respectively. For reference, another curve shown together with the voltage change curve of the battery in FIG. 2 is a curve showing a change in engine speed with time after the engine is started.

S2 내지 S4 단계를 통해, 필터링 된 엔진의 회전수와 배터리의 전압 및 전압 상승률이 각각 검출되면, 검출된 값들을 미리 저장되어 있는 기준값과 비교한다(S5). 참고로, 기준값은 엔진의 회전수의 경우 대략 1000rpm, 배터리의 전압은 11.5V며, 전압 상승률은 대략 10V/sec다. 물론 이 기준값들은 바람직한 경우를 예로 든 것이며, 반드시 상기의 수치들에만 한정되지 않는다.In operation S2 to S4, when the rotation speed of the filtered engine, the voltage of the battery, and the rate of increase of the voltage are respectively detected, the detected values are compared with a reference value stored in advance (S5). For reference, the reference value is about 1000 rpm for the engine speed, the voltage of the battery is 11.5V, and the rate of voltage increase is about 10V / sec. Of course, these reference values are examples of preferred cases, and are not necessarily limited to the above numerical values.

검출된 값들, 즉 엔진 회전수와 배터리의 전압, 및 배터리의 전압 상승률이 모두 기준값을 초과할 경우, 전자제어식 연료분사시스템은 엔진의 시동이 완료된 것으로 판단한다.When the detected values, that is, the engine speed, the voltage of the battery, and the rate of increase of the voltage of the battery all exceed the reference value, the electronically controlled fuel injection system determines that the engine has been started.

엔진의 시동이 완료된 것으로 판단되면, 전자제어식 연료분사시스템은 시동 조건에 따라 설정된 연료분사량 제어를 중지하고, 일반적인 주행 조건에 따른 연료분사량 제어를 수행한다(S6).When it is determined that the engine is started, the electronically controlled fuel injection system stops the fuel injection amount control set according to the start condition, and performs the fuel injection amount control according to the general driving condition (S6).

그리고, 엔진의 시동이 완료되어 엔진의 회전수가 크게 상승되면 엔진의 회전수 검출을 위한 크랭크 각 센서의 출력값에 대한 저역 필터의 필터링이 불가능해진다. 따라서, 엔진의 시동이 완료된 것으로 판단된 다음 소정의 시간이 경과되면, 저역 필터를 이용한 크랭크 각 센서의 필터링을 중지한다.When the engine is completely started and the engine speed is greatly increased, the filtering of the low pass filter on the output value of the crank angle sensor for detecting the engine speed is impossible. Therefore, when a predetermined time elapses after it is determined that the engine is started, the filtering of the crank angle sensor using the low pass filter is stopped.

상기된 바와 같은 본 발명은, 엔진의 시동완료 판단시 엔진의 회전수 뿐만 아니라 배터리의 전압 조건도 함께 고려한다. 따라서, 엔진의 시동완료 시점을 보다 정확하게 판단할 수 있어 차량의 시동성이 크게 개선되는 효과를 얻을 수 있다. 더욱이 엔진의 회전수 검출시 크랭크 각 센서의 출력값을 필터링 하여 노이즈를 제거할 경우 더욱 정확하게 엔진의 시동완료를 판단할 수 있다.As described above, the present invention considers not only the rotational speed of the engine but also the voltage condition of the battery when determining the start of the engine. Therefore, it is possible to more accurately determine the start time of the engine, thereby obtaining the effect of greatly improving the startability of the vehicle. In addition, when the engine speed is detected, the output value of each crank sensor is filtered to remove the noise, and thus, the engine start completion can be more accurately determined.

이상에서는, 본 발명을 특정의 바람직한 실시예에 대하여 도시하고 설명하였다. 그러나, 본 발명은 반드시 상기의 실시예에만 한정되는 것은 아니며, 본 발명이 속하는 분야에서 통상의 지식을 가진 자라면 이하의 청구범위에 기재된 본 발명의 기술적 사상의 요지 내에서 얼마든지 다양하게 변경실시할 수 있을 것이다.In the above, the present invention has been illustrated and described with respect to certain preferred embodiments. However, the present invention is not necessarily limited to the above embodiments, and those skilled in the art to which the present invention pertains can variously change variously within the gist of the technical idea of the present invention described in the claims below. You can do it.

Claims (4)

엔진이 시동되면, 시동 조건에 맞게 미리 결정된 방식에 따라 연료분사량을 제어하는 제1 단계;When the engine is started, controlling the fuel injection amount in a predetermined manner according to the starting condition; 상기 엔진의 크랭크 각 센서의 출력으로부터 상기 엔진의 회전수를 검출하는 제2 단계;Detecting a rotation speed of the engine from an output of a crank angle sensor of the engine; 배터리의 전압을 검출하는 제3 단계;Detecting a voltage of the battery; 상기 배터리의 전압 상승률을 검출하는 제4 단계; 및Detecting a voltage rising rate of the battery; And 상기 제2 내지 제4 단계에서 각각 검출된 엔진의 회전수, 배터리의 전압 및 전압 상승률이 모두 미리 결정된 각각의 기준치를 초과할 경우, 엔진의 시동이 완료된 것으로 판단하고, 상기 시동 조건에 따른 연료분사량의 제어를 중지하는 제5 단계;를 포함하는 차량용 전자제어식 연료분사시스템의 엔진시동완료 판단방법.When the engine speed, the voltage of the battery and the rate of increase of the voltage respectively detected in the second to fourth stages exceed respective predetermined reference values, it is determined that the engine is completely started, and the fuel injection amount according to the starting condition A fifth step of stopping the control of the engine start completion determination method of the electronically controlled fuel injection system for a vehicle comprising a. 제 1 항에 있어서, 상기 제2 단계는 크랭크 각 센서의 출력 신호로부터 크랭크축의 진동으로 인한 노이즈 성분을 제거하는 제6 단계를 더 포함하는 것을 특징으로 하는 차량용 전자제어식 연료분사시스템의 엔진시동완료 판단방법.The engine start completion determination of the electronically controlled fuel injection system for a vehicle according to claim 1, wherein the second step further comprises a sixth step of removing a noise component due to vibration of the crankshaft from an output signal of the crank angle sensor. Way. 제 2 항에 있어서, 상기 제6 단계는 저역 필터를 이용하여 수행되는 것을 특징으로 하는 차량용 전자제어식 연료분사시스템의 엔진시동완료 판단방법.The method of claim 2, wherein the sixth step is performed using a low pass filter. 제 2 항에 있어서, 상기 제5 단계에서 시동이 완료된 것으로 판단되면, 소정 시간의 지연 후 상기 제6 단계가 중지되는 것을 특징으로 하는 차량용 전자제어식 연료분사시스템의 엔진시동완료 판단방법.3. The method of claim 2, wherein if the start is determined in the fifth step, the sixth step is stopped after a delay of a predetermined time.
KR1019990035656A 1999-08-26 1999-08-26 Method for judging the end of engine starting of an electronic controlled feul injection system for a motor vehicle KR100302376B1 (en)

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