KR970027740A - How to control the air fuel ratio of lean burn engine - Google Patents

How to control the air fuel ratio of lean burn engine Download PDF

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Publication number
KR970027740A
KR970027740A KR1019950044626A KR19950044626A KR970027740A KR 970027740 A KR970027740 A KR 970027740A KR 1019950044626 A KR1019950044626 A KR 1019950044626A KR 19950044626 A KR19950044626 A KR 19950044626A KR 970027740 A KR970027740 A KR 970027740A
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KR
South Korea
Prior art keywords
lean
operating
load
fuel
engine
Prior art date
Application number
KR1019950044626A
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Korean (ko)
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KR100187978B1 (en
Inventor
이우직
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전성원
현대자동차 주식회사
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Priority to KR1019950044626A priority Critical patent/KR100187978B1/en
Publication of KR970027740A publication Critical patent/KR970027740A/en
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Publication of KR100187978B1 publication Critical patent/KR100187978B1/en

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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
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
    • F02D41/1454—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio
    • 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)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Abstract

본 발명은 희박공연비 상태에서 급가속시 중속/중부하공연비로 신속하게 변화시켜 이론공연비로 도달하는 시간을 단축시켜 주므로서 가속감을 향상시키는 동시에 질소산화물의 배기를 감소시키도록 한 린번엔진의 공연비제어방법에 관한 것으로, 냉각수의 온도를 전자 제어부가 감지하여 엔진의 웜업이 완료되었는지의 여부를 판단하는 단계(단계1)와, 엔진의 웜업이 완료되면 엔진의 희박구간인지를 판단하여 희박구간이 아니면 리턴단계로 가서 처음부터 다시 시작하도록하는 단계(단계2)와, 엔진의 희박구간인 경우 트로틀밸브의 열리는 속도를 전자제어부가 감지하는 단계(단계3)와, 트로틀밸브의 열림속도가 설정값을 기준으로 급가속인지 아닌지를 판단하여 급가속이 아닌 경우 희박공연비로 운전하도록 하는 단계(단계4)와, 트로틀밸브의 열림속도가 설정값보다 커서 급가속신호를 받게 되는 경우 현재의 부하가 중속/중부하의 조건보다 큰지 작은지를 판단하여 작으면 희박 공연비로 운전하도록 하는 단계(단계5)와, 현재의 부하는 중속/중부하의 조건보다 큰 경우 이론공연비로 운전하도록 하는 단계(단계6)와, 이론공연비로 운전시 현재의 부하가 중속/중부하의 조건보다 큰지 작은지를 판단하여 크면 이론공연비로 계속 운전하도록 하는 단계(단계7)와, 이론공연비로 운전시 현재의 부하가 중속/중부하의 조건보다 작으면 희박공연비로 운전되도록 하는 단계(단계8)와, 희박공연비 상태로 운전시 현재의 부하가 이론 공연비의 조건보다 큰지 작은지를 판단하여 크면 중속/중부하공연비로 운전하도록 하는 단계(단계9)와, 희박공연비 상태로 운전시 현재의 부하가 이론공연비의 조건보다 작으면 처음부터 다시 시작하도록 리턴되는 단계(단계10);로 된 린번엔진의 공연비제어방법이다.In the present invention, the air-fuel ratio control of the lean burn engine to reduce the exhaust of nitrogen oxides while improving the feeling of acceleration by shortening the time to reach the theoretical performance by rapidly changing to medium speed / heavy load fuel ratio during rapid acceleration in lean fuel economy. The method of the present invention relates to a method of determining whether or not an engine warm-up is completed by detecting the coolant temperature (step 1), and determining whether the engine is lean section when the engine warm-up is completed. Go to the return step and start again from the beginning (step 2), in the case of engine lean section, the electronic control unit detects the opening speed of the throttle valve (step 3), and the opening speed of the throttle valve Determining whether or not the rapid acceleration on the basis of the step (step 4) to operate in lean fuel economy if the rapid acceleration is not, and the throttle valve opened If the speed is greater than the set value and a rapid acceleration signal is received, determining whether the current load is greater than or less than the medium speed / medium load condition and operating at a lean air-fuel ratio if it is small (step 5), and the current load is medium speed / middle load. If it is greater than the following conditions, the operation is performed at the theoretical performance ratio (step 6), and if the current load is greater or less than the medium speed / heavy load condition when operating at the theoretical performance ratio, the operation is continued at the theoretical performance ratio if it is large (step 7). ), If the current load is lower than the medium speed / heavy load condition when operating at theoretical fuel efficiency (step 8), and the current load is higher than the theoretical air fuel condition when operating at lean fuel consumption. If it is judged to be large, the operation of operating at medium speed / heavy fuel efficiency (step 9), and the current load when operating in lean fuel efficiency is less than the condition of theoretical performance ratio. (Step 10) to be returned to the beginning, starting again; the air-fuel ratio to a control method for a lean-burn engine.

Description

린번엔진의 공연비제어방법How to control the air fuel ratio of lean burn engine

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제1도는 본 발명의 플로우 챠트도.1 is a flowchart of the present invention.

제2도는 본 발명의 플로우 챠트에 의한 엔진의 회전수와 부하의 관계를 나타낸 그래프.2 is a graph showing the relationship between the engine speed and the load by the flow chart of the present invention.

제4도는 린번엔진의 개략적인 연료분사장치의 구성도.4 is a schematic diagram of a fuel injection device of a lean burn engine.

제5도는 제4도의 플로우 챠트에 의한 엔진의 회전수와 부하의 관계를 나타낸 그래프.FIG. 5 is a graph showing the relationship between the engine speed and the load according to the flowchart of FIG.

Claims (1)

냉각수의 온도를 전자제어부가 감지하여 엔진의 웜업이 완료되었는지의 여부를 판단하는 단계와, 엔진의 웜업이 완료되면 엔진의 희박구간인지를 판단하여 희박구간이 아니면 리턴단계로 가서 처음부터 다시 시작하도록하는 단계와, 엔진의 희박구간인 경우 트로틀밸브의 열리는 속도를 전자제어부가 감지하는 단계와, 트로틀밸브의 열림속도가 설정값을 기준으로 급가속인지 아닌지를 판단하여 급가속이 아닌 경우 희박공연비로 운전하도록 하는 단계와, 트로틀밸브의 열림속도가 설정값보다 커서 급가속신호를 받게 되는 경우 현재의 부하가중속/중부하의 조건보다 큰지 작은지를 판단하여 작으면 희박 공연비로 운전하도록 하는 단계와, 현재의 부하는 중속/중부하의 조건보다 큰 경우 이론공연비로 운전하도록 하는 단계와, 이론공연비로 운전시 현재의 부하가 중속/중부하의 조건보다 큰지 작은지를 판단하여 크면 이론공연비로 계속 운전하도록 하는 단계와, 이론공연비로 운전시 현재의 부하가 중속/중부하의 조건보다 작으면 희박공연비로 운전되도록 하는 단계와, 희박공연비 상태로 운전시 현재의 부하가 이론 공연비의 조건보다 큰지 작은지를 판단하여 크면 중속/중부하공연비로 운전하도록 하는 단계와, 희박공연비 상태로 운전시 현재의 부하가 이론공연비의 조건보다 작으면 처음부터 다시 시작하도록 리턴되는 단계;로 된 것을 특징으로 하는 린번엔진의 공연비제어방법.The electronic control unit senses the temperature of the coolant to determine whether the engine warm-up is completed. If the engine warm-up is completed, it is determined whether the engine is lean section. The electronic control unit detects the opening speed of the throttle valve in the case of an engine lean section, and judges whether the opening speed of the throttle valve is a rapid acceleration based on a set value, Driving and when the opening speed of the throttle valve is greater than the set value and the rapid acceleration signal is received, judging whether the load is greater or smaller than the current load acceleration / heavy load condition and operating at a lean air-fuel ratio if small. If the load is greater than the medium speed / heavy load condition, operate at theoretical performance ratio, and operate at theoretical performance ratio. Determining whether the current load is larger or smaller than the medium speed / heavy load condition, and if the load is large, continue to operate at the theoretical performance ratio, and if the current load is smaller than the medium speed / heavy load condition when operating at the theoretical performance ratio, operating at lean fuel economy ratio If the current load is greater or less than the theoretical air fuel condition when operating in lean fuel economy state, if the operation is large and medium-speed heavy fuel economy, and the current load when operating in lean fuel economy state than the theoretical air fuel condition If it is small, the step of returning to start from the beginning; Air-fuel ratio control method of a lean burn engine, characterized in that the. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950044626A 1995-11-29 1995-11-29 Air fuel ratio control method of lean burn engine KR100187978B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950044626A KR100187978B1 (en) 1995-11-29 1995-11-29 Air fuel ratio control method of lean burn engine

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Application Number Priority Date Filing Date Title
KR1019950044626A KR100187978B1 (en) 1995-11-29 1995-11-29 Air fuel ratio control method of lean burn engine

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KR970027740A true KR970027740A (en) 1997-06-24
KR100187978B1 KR100187978B1 (en) 1999-06-01

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100394645B1 (en) * 2000-12-28 2003-08-14 현대자동차주식회사 Method for controlling lean burn engine
KR20190135166A (en) 2018-05-28 2019-12-06 현대위아 주식회사 Cooling device for reducing thermal deformation of machine tool
KR20210075309A (en) 2019-12-13 2021-06-23 현대위아 주식회사 Transfer shaft for machine tooling with bearing cooling function

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100394645B1 (en) * 2000-12-28 2003-08-14 현대자동차주식회사 Method for controlling lean burn engine
KR20190135166A (en) 2018-05-28 2019-12-06 현대위아 주식회사 Cooling device for reducing thermal deformation of machine tool
KR20210075309A (en) 2019-12-13 2021-06-23 현대위아 주식회사 Transfer shaft for machine tooling with bearing cooling function

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KR100187978B1 (en) 1999-06-01

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