KR960012144B1 - Method for calibrating fuel film - Google Patents

Method for calibrating fuel film Download PDF

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Publication number
KR960012144B1
KR960012144B1 KR1019920027407A KR920027407A KR960012144B1 KR 960012144 B1 KR960012144 B1 KR 960012144B1 KR 1019920027407 A KR1019920027407 A KR 1019920027407A KR 920027407 A KR920027407 A KR 920027407A KR 960012144 B1 KR960012144 B1 KR 960012144B1
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South Korea
Prior art keywords
value
threshold
slope
cormap
engine load
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KR1019920027407A
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Korean (ko)
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KR940015224A (en
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서광민
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현대자동차 주식회사
전성원
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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
    • F02D41/10—Introducing corrections for particular operating conditions for acceleration

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

measuring temperature by a water temperature sensor; transmitting the control signal by the gradient (DELWTSL) defined in the ROM of a electronic control unit; measuring the engine load using a MAP A/D converter and sending to a S/W filter; transmitting the hardware constant to the threshold according to the gradient (GAIMAPC) and sending signals according to the gradient (MAPTHRC); generating the value (CORMAP) by comparing the value from the threshold and the constant value (SCLMAPC) and sending to the MAP; calculating the default injection quantity; and compensating by the engine load and the gradient of RPM (DELCORM) if the values form the threshold are CORMAPMING DCORMAP DCORMAPMAXC.

Description

과도운전 영역에 대한 연료의 액막지연 보상방법Liquid film delay compensation method of fuel in overdriving

도면은 본 발명의 액막지연 보상방법을 도시하는 제어도.Figure is a control diagram showing a liquid film delay compensation method of the present invention.

본 발명은 자동차의 엔진의 과도운전영역에 있어서 연료의 액막지연 보상방법에 관한 것이다.The present invention relates to a liquid film delay compensation method of fuel in an overdriving region of an engine of a vehicle.

현재의 엔진제어 방법은 흡기공기량의 압력(부압정도) 및 유량계(맵 센서 또는 매스 에어 플로우 센서)에서 읽어들인 흡기량의 변화량 또는 드로틀 포지션 센서의 개도변화율에 따라 수온에 따른 맵 값으로 사용한다.The current engine control method is used as a map value according to the water temperature according to the pressure (degree of negative pressure) of the intake air amount and the change amount of the intake amount read from the flowmeter (map sensor or mass air flow sensor) or the opening degree change rate of the throttle position sensor.

이러한 엔진 제어방법은 과도운전 영역에서의 운전조건을 고려하지 않아서 응답성 및 정확도가 떨어지고, 흡기다기관 및 흡기밸브 주위에 부착되는 연료의 양에 의하여 과도상태의 액막지연에 의해 흡기량이 부족한 현상이 발생한다.This engine control method does not take into account the operating conditions in the over-driving region, resulting in poor responsiveness and accuracy, and a phenomenon in which the intake amount is insufficient due to the excessive liquid film delay due to the amount of fuel adhering around the intake manifold and the intake valve. do.

본 발명의 목적은 상기와 같은 단점을 제거하기 위하여 맵의 변화량 또는 과도상태에서의 연료변화량에 비례한 수온 및 엔진 부하와 회전수의 운전조건을 측정하여 과도운전영역에서 과도공연비를 보정하는 연료의 액막지연 보상방법을 제공하고자 하는 것이다.An object of the present invention is to measure the operating conditions of the water temperature and engine load and rotational speed in proportion to the amount of change of the map or the amount of change of fuel in the transient state in order to eliminate the above disadvantages of the fuel for correcting the transient performance ratio in the transient operation region It is to provide a liquid film delay compensation method.

본 발명을 첨부된 도면을 참조하여 하기에 상세히 설명한다.The present invention will be described in detail below with reference to the accompanying drawings.

도면에는 본 발명의 액막지연 보상방법이 제어도로서 도시되는데, 수온센서는 수온을 측정하고 전자제어 유니트의 롬에 설정된 기울기(DELWTSL)에 따라 제어신호를 보낸다.In the figure, the liquid film delay compensation method of the present invention is shown as a control diagram. The water temperature sensor measures the water temperature and sends a control signal according to the slope DELWTSL set in the ROM of the electronic control unit.

맵 A/D 변환기는 엔진부하를 측정하여 S/W 필터로 보내고 S/W 필터에서는 기울기(GAIMPC)에 따라 하드웨어 상수를 보내며 이 값은 스레시홀드로 들어가서 기울기(MAPTHRC)에 따라 신호를 보낸다. 여기서 기울기(MAPTHRC)는 적은 엔진 부하에서는 영향을 미치지 않게 설정되어 있다.The map A / D converter measures the engine load and sends it to the S / W filter, and the S / W filter sends hardware constants according to the slope (GAIMPC), which enters the threshold and signals the slope (MAPTHRC). The slope MAPTHRC is set so as not to affect the small engine load.

스래시홀드로부더 발생한 값을 일정한 값(SCLMAPC)과 대비하여 값(CORMAP)을 만들고 맵으로 보내서 기본 분사량을 계산한다.The threshold value is calculated by comparing the value generated by the threshold with the constant value (SCLMAPC) and sending it to the map.

이때, MAP=MAP F/L+CORMAP이고, INJC(미도시)는 기본 분사량 변환계수이고, INJCOR(미도시)은 기본 목표 공연비 보정값이다.At this time, MAP = MAP F / L + CORMAP, INJC (not shown) is the basic injection amount conversion coefficient, and INJCOR (not shown) is the basic target air-fuel ratio correction value.

스레시홀드로부터 발생한 값이 CORMAPMINCCORMAPCORMAPMAXC이면 엔진 부하와 회전수의 더블 인터플레이션인 기울기(DELCORM)에 따른 값(CORDEL)에 의해 보상되어 액막지연 보상이 이루어진다.If the value generated from the threshold is CORMAPMINCCORMAPCORMAPMAXC, liquid film delay compensation is compensated by the value (CORDEL) according to the slope (DELCORM), which is a double inflation of the engine load and the rotational speed.

보상값(CORDEL)은 가감속시 흡입 공기량의 계측 지연에 대한 보정값(CORMAP)과 수온에 대한 보정값(DELWTSL), 엔진의 운전 조건(엔진 회전수 및 부하 조건)에 대한 보정값(DELCOR)으로 이루어지며, 다음과 같은 식으로 나타낼 수 있다.The compensation value (CORDEL) is a correction value (CORMAP) for the measurement delay of the intake air amount at acceleration and deceleration, a correction value (DELWTSL) for water temperature, and a correction value (DELCOR) for the engine operating conditions (engine rotation speed and load condition). It can be expressed as follows.

보상값(CORDEL)은 단계적으로 (STPCORC)보상되는데 이 값은 증가되거나 (DELCOR1, CELCOR2) 감소되어 (DELCOR3, DELCOR4) 진행된다.The compensation value CORDEL is compensated step by step (STPCORC), which is increased (DELCOR1, CELCOR2) or decreased (DELCOR3, DELCOR4).

한편 기본 분사량을 계산하는데 사용되는 값(CORMAP)은 다음 식으로 나타낼 수 있다.On the other hand, the value used to calculate the basic injection amount (CORMAP) can be expressed by the following equation.

CORMAP = MAPDLT × SCLMAPCCORMAP = MAPDLT × SCLMAPC

본 발명의 연료의 액막지연 보상방법에 따르면 흡기 다기관 및 흡기밸브 주위에 부착되는 연료의 양에 의하여 과도 상태의 액막지연에 의한 흡기량이 부족한 현상이 보정되어 엔진 제어에 우수한 효과가 있다.According to the liquid film delay compensation method of the fuel of the present invention, the phenomenon that the amount of intake air due to the liquid film delay in the transient state is insufficient due to the amount of fuel adhered to the intake manifold and the intake valve is excellent in engine control.

Claims (1)

수온센서는 수온을 측정하고 전자제어유니트의 롬에 설정된 기울기(DELWTSL)에 따라 제어신호를 보내고 맵 A/D 변환기는 엔진 부하를 측정하여 S/W 필터로 보내고 S/W 필터에서는 기울기(GAIMAPC)에 따라 하드웨어 상수를 보내며 이 값은 스레시홀드로 들어가서 기울기(MAPTHRC)에 따라 신호를 보내며 스레시홀드로부터 발생한 값을 일정한 값(SCLMAPC)과 대비하여 값(CORMAP)을 만들고 맵으로 보내서 기본 분사량을 계산하고 스레시홀드로부터 발생한 값이 CORMAPMING CORMAP CORMAPMAXC이면 엔진 부하와 회전수의 기울기(DELCORM)에 따른 값에 의해 보상되어 액막지연 보상이 이루어지게 하는 연료의 액막지연 보상방법.The water temperature sensor measures the water temperature and sends a control signal according to the slope (DELWTSL) set in the ROM of the electronic control unit.The map A / D converter measures the engine load to the S / W filter and the slope in the S / W filter (GAIMAPC). Hardware value is sent according to the threshold, and the signal is transmitted according to the slope (MAPTHRC). The liquid film delay compensation method of the fuel which is compensated by the value according to the engine load and the rotational speed slope (DELCORM) if the value generated from the threshold is CORMAPMING CORMAP CORMAPMAXC. 단, 보상값(CORDEL)은 다음과 같은 식으로 나타낼 수 있다.However, the compensation value CORDEL may be expressed as follows. 값(CORMAP)은 다음 식으로 나타낼 수 있다.The value CORMAP can be expressed by the following equation. CORMAP = MAPDLT × SCLMAPCCORMAP = MAPDLT × SCLMAPC
KR1019920027407A 1992-12-31 1992-12-31 Method for calibrating fuel film KR960012144B1 (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
KR1019920027407A KR960012144B1 (en) 1992-12-31 1992-12-31 Method for calibrating fuel film

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KR960012144B1 true KR960012144B1 (en) 1996-09-16

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