KR950008944A - Automotive fuel control method - Google Patents

Automotive fuel control method Download PDF

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Publication number
KR950008944A
KR950008944A KR1019930018880A KR930018880A KR950008944A KR 950008944 A KR950008944 A KR 950008944A KR 1019930018880 A KR1019930018880 A KR 1019930018880A KR 930018880 A KR930018880 A KR 930018880A KR 950008944 A KR950008944 A KR 950008944A
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South Korea
Prior art keywords
engine
fuel
amount
correction amount
engine controller
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KR1019930018880A
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Korean (ko)
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정재권
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전성원
현대자동차 주식회사
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Priority to KR1019930018880A priority Critical patent/KR950008944A/en
Publication of KR950008944A publication Critical patent/KR950008944A/en

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Abstract

계절적 요인, 외부 온도, 엔진의 노후화 및 체적 효율 등이 원인으로 되어 발생되는 흡기량 계측신호와 실제 흡기량의 차이로 인하여 이론 공연비로 제어하기 어려운 문제점을 해결하고자, 엔진(10)의 체적효율 ηV 또는 스로틀 개방도에 비례하는 흡기 보정계수 K를 단계별로 맵화하여 놓고, 엔진 컨트롤러(4)가 엔진(10)의 운전조건에 따라 흡기 보정계수 K를 매핑해서 엔진(10)의 전 운전영역에 걸쳐 실린더로 유입되는 실제 흡기량 Qe를 계축할 수 있게 하고, 엔진(10)의 시동후에 엔진 컨트롤러(4)가 수온센서를 통해 현재의 수온을 체크하여 엔진 웜-업 상태를 판정한 다음, 공회전에 필요한 기본 연료량 To를 연산하고, 엔진 컨트롤러(4)의 메모리영역에 보정량 Kf가 메모리되어 있는지를 체크하여 보정량 Kf가 메모리되어 있지 않으면, 임의값으로 초기화시키며, 또 메모리된 보정량 Kf가 있으면, 이를 독출해서 관계식에 따라 분사 연료량의 보정을 연산하고, 이어서 산소센서(14)의 활성화에 의한 피이드 백신호의 입력여부를 판별한 후에 엔진(10)의 운전조건이 가속인 때에 메모리된 계수시간 Td를 독출하고. 계수시간 Td의 독출 종료 직후에 입력되는 산소센서(14)의 공연비 판정신호를 샘플링하여 희박으로 판정되었을 때, 연료 분사량에 추가 보정량 I를 가산하여 보정하고, 농후로 판정되었을 때, 연료 분사량에서 추가 보정량 I를 감산하여 보정하며, 상기한 과정을 반복하여 연료 분사량이 이론 공연비로 되게 하는 자동차용 연료 제어방법.In order to solve the problem that it is difficult to control the theoretical air-fuel ratio due to the difference between the intake air volume measurement signal and the actual intake air volume caused by seasonal factors, external temperature, engine aging and volume efficiency, the volume efficiency ηV of the engine 10 or the throttle The intake correction coefficient K proportional to the opening degree is mapped in stages, and the engine controller 4 maps the intake correction coefficient K according to the operating conditions of the engine 10 to the cylinder over the entire operating region of the engine 10. After the engine 10 is started, the engine controller 4 checks the current water temperature through the water temperature sensor to determine the engine warm-up state after starting the engine 10, and then the basic fuel amount required for idling. If To is calculated, it is checked whether the correction amount Kf is stored in the memory area of the engine controller 4, and if the correction amount Kf is not stored, it is initialized to an arbitrary value. Further, if there is a stored correction amount Kf, it is read out, the correction of the injection fuel amount is calculated according to the relational expression, and after determining whether the feed vaccine is inputted by the activation of the oxygen sensor 14, the operating condition of the engine 10 is determined. The stored counting time Td is read out during acceleration. When it is determined that the air-fuel ratio determination signal of the oxygen sensor 14 input immediately after the completion of the counting time Td is judged to be lean, the additional correction amount I is added to the fuel injection amount to correct it, and when it is determined to be rich, the fuel injection amount is added. Correcting by subtracting the correction amount I, and repeating the above process so that the fuel injection amount becomes the theoretical air-fuel ratio.

Description

자동차용 연료 제어 방법Automotive fuel control method

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 종래 L제트로 방식에 있어서, 가속중의 연료 공급과 흡기량의 변화 관계를 나타내는 설명도.1 is an explanatory diagram showing a relationship between a fuel supply during acceleration and an intake air amount in a conventional L jet system.

제2도는 본 발명의 적용되는 연료 공급계통을 설명하기 위한 L제트로 방식의 개략도.2 is a schematic diagram of an L-jet method for explaining the fuel supply system to which the present invention is applied.

제3도는 본 발명에 있어서, 연료공급의 보정량에 관련된 맵을 나타내는 도면.3 is a diagram showing a map related to a correction amount of fuel supply in the present invention.

제4도는 산소센서의 피이드 백신호에 따른 연료 공급 보정량에 관련된 맵을 나타내는 도면.4 is a diagram showing a map related to the fuel supply correction amount according to the feed vaccine of the oxygen sensor.

Claims (2)

에어 플로우미터로부터 계측된 흡기량 계측신호와 수온센서, 스로틀위치센서 및 크랭크각센서의 신호를 엔진 컨트롤러가 데이터 처리하여 인젝터의 열림시간을 제어하는 신호를 출력함으로써 연료의 분사량을 조절하는 L제트로방식의 자동차용 연료 제어방법에 있어서, 엔진(10)의 체적효율을 ηV 또는 스로틀 개방도에 비례하는 흡기 보정계수 K를 단계별로 맵화하여 놓고, 엔진 컨트롤러(4)가 엔진(10)의 전 운전영역에 걸쳐 실린더로 유입되는 실제 흡기량 Qe를 계측한 다음, 이를 토대로 연료 분사량을 미세 보정하여 이론 공연비로 되게 함을 특징으로 하는 자동차용 연료 제어방법.L-Jet type to control the injection amount of fuel by outputting a signal to control the opening time of the injector by the engine controller processing data of the intake air volume measurement signal measured from the air flow meter and the signals of the water temperature sensor, the throttle position sensor and the crank angle sensor. In the fuel control method for automobiles, the volume efficiency of the engine 10 is mapped by stepwise with the intake correction coefficient K proportional to ηV or the throttle opening degree, and the engine controller 4 controls the entire operating region of the engine 10. And measuring the actual air intake amount Qe flowing into the cylinder over a period of time, and finely correcting the fuel injection amount based on this to achieve a theoretical air-fuel ratio. 에어 플로우미터로부터 계측된 흡기량 계측신호와 수온센서, 스로틀 위치센서 및 크랭크각센서의 신호를 엔진 컨트롤러가 데이터 처리하여 인젝터의 열림시간을 제어하는 신호를 출력함으로써 연료의 분사량을 조절하는 L제트로방식의 자동차용 연료 제어방법에 있어서, 엔진(10)의 시동후에 엔진 컨트롤러(4)가 수온센서를 통해 현재의 수온을 체크하여 엔진 웜-업상태를 판정하는 스텝(20)과, 이어서 엔진 컨트롤러(4)가 공회전에 필요한 기본 연료량 To를 연산하는 스텝(22)과, 엔진 컨트롤러(4)의 메모리영역에 보정량 Kf가 메모리되어 있는지를 체크하는 스텝(24)과, 엔진 컨트롤러(4)는 보정량 KFa가 메모리되어 있지 않으면, 임의값으로 초기화시키는 스텝(26)과, 메모리된 보정량 Kf가 있으면, 이를 독출해서 하기 관계식에 따라 분사 연료량의 연산을 행하는 스텝(28)과, 산소센서(14)의 활성화를 체크하여 비활성화일 때는 상기 스텝 28로 복귀하고, 활성화되어 있는 때는 다음으로 넘어 가는 스텝(30)과, 산소센서(14)로부터 피이드 백신호가 입력되는지를 체크하여 미입력시는 스텝 28로 되돌아가고, 입력시는 다음은 넘어 가는 스텝(32)과, 엔진(10)의 운전조건이 가속인가를 체크하는 스텝(34)과, 가속으로 판정시에 메모리된 계수기간 Td를 독출하는 스텝(36)과, 계수시간 Td의 독출 종료 직후에 입력되는 산소센서(14)의 공연비 판정신호가 희박을 의미하는가를 체크하는 스텝(38)과, 공연비 희박으로 판정되었을 때, 연료 분사량에 추가 보정량 I를 가산하여 보정하는 스텝(40)과, 공연비 농후로 판정되었을 때, 연료 분사량에서 추가 보정량 I를 감산하여 보정하는 스텝(42)으로 연료 분사량이 제어되고, 상기의 과정을 반복함을 특징으로 하는 자동차용 연료 제어 방법.The L-Jetro system adjusts the injection amount of fuel by outputting a signal that controls the opening time of the injector by processing the data of the intake air volume measurement signal measured by the air flow meter and the signals of the water temperature sensor, the throttle position sensor and the crank angle sensor. In the fuel control method for automobiles, the engine controller 4 checks the current water temperature through the water temperature sensor after starting the engine 10 to determine an engine warm-up state, and then the engine controller ( Step 22 for calculating the basic fuel amount To required for idling, step 24 for checking whether the correction amount Kf is stored in the memory area of the engine controller 4, and the engine controller 4 performs the correction amount KFa. Is not stored, the step 26 is initialized to an arbitrary value, and if there is the corrected correction amount Kf, it is read out and the injection fuel amount is calculated according to the following equation. Checks the step 28, the activation of the oxygen sensor 14, and returns to the step 28 when inactive. When activated, the feed vaccine number is entered from the step 30 and the oxygen sensor 14. When it is inputted, it returns to step 28 when it is not input, and when it inputs, it passes to step 32, the step 34 which checks whether the operating condition of the engine 10 is acceleration, and when it determines with acceleration A step 36 for reading out the counting period Td stored in the memory; a step 38 for checking whether the air-fuel ratio determination signal of the oxygen sensor 14 input immediately after the end of the reading of the counting time Td means lean; The fuel injection amount is controlled by the step 40 of adding and correcting the additional correction amount I to the fuel injection amount when determined to be lean, and the step 42 of subtracting and correcting the additional correction amount I from the fuel injection amount when it is determined to be the air fuel ratio rich. The above process Repeating also how the fuel control for the car, characterized by. 관계식]Relations] Tf=Kf*To [단, To=K*Tb+Tacl, 여기서 To는 엔진 컨트롤러가 계산한 연료 분사량으로서 보정량 Kf가 함산되지 않은 것이고, K는 흡기 보정계수, Tb는 연료 기본 분사량, Tacl은 가속시에 더해주는 연료 분사량이다]Tf = Kf * To [where To = K * Tb + Tacl, where To is the fuel injection amount calculated by the engine controller, where the correction amount Kf is not added, K is the intake correction factor, Tb is the fuel injection rate, and Tacl is the acceleration Is the amount of fuel added to the city] ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019930018880A 1993-09-17 1993-09-17 Automotive fuel control method KR950008944A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100405697B1 (en) * 2000-12-30 2003-11-14 현대자동차주식회사 Method for tip in enrichment of engine
KR100432030B1 (en) * 2002-03-22 2004-05-17 현대자동차주식회사 air-fuel ratio control method for a Liquefied Petroleum Injection of a vehicle
KR100422619B1 (en) * 1997-12-31 2004-06-16 현대자동차주식회사 Fuel injection control method
KR100440162B1 (en) * 2002-06-29 2004-07-12 현대자동차주식회사 Method of controlling fuel for accleration and deceleration of vehicle under cold driving
KR100489059B1 (en) * 2002-06-18 2005-05-12 현대자동차주식회사 Fuel distribution method in a common rail injection system
KR100624225B1 (en) * 1999-12-30 2006-09-13 현대자동차주식회사 A electric control engine and method for correcting fuelling map automatically in the engine

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100422619B1 (en) * 1997-12-31 2004-06-16 현대자동차주식회사 Fuel injection control method
KR100624225B1 (en) * 1999-12-30 2006-09-13 현대자동차주식회사 A electric control engine and method for correcting fuelling map automatically in the engine
KR100405697B1 (en) * 2000-12-30 2003-11-14 현대자동차주식회사 Method for tip in enrichment of engine
KR100432030B1 (en) * 2002-03-22 2004-05-17 현대자동차주식회사 air-fuel ratio control method for a Liquefied Petroleum Injection of a vehicle
KR100489059B1 (en) * 2002-06-18 2005-05-12 현대자동차주식회사 Fuel distribution method in a common rail injection system
KR100440162B1 (en) * 2002-06-29 2004-07-12 현대자동차주식회사 Method of controlling fuel for accleration and deceleration of vehicle under cold driving

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