KR960011095A - Engine air-fuel ratio control device - Google Patents

Engine air-fuel ratio control device Download PDF

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Publication number
KR960011095A
KR960011095A KR1019940023292A KR19940023292A KR960011095A KR 960011095 A KR960011095 A KR 960011095A KR 1019940023292 A KR1019940023292 A KR 1019940023292A KR 19940023292 A KR19940023292 A KR 19940023292A KR 960011095 A KR960011095 A KR 960011095A
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South Korea
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time
reversal
dense
value
lean
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KR1019940023292A
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Korean (ko)
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KR0145367B1 (en
Inventor
히로시 이와노
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쯔지 요시후미
니싼 지도샤 가부시끼가이샤
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Priority to KR1019940023292A priority Critical patent/KR0145367B1/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
    • F02D41/06—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

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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)
  • Exhaust Gas After Treatment (AREA)

Abstract

본 발명은 시동 직후에 NOx 배출량을 그다지 증가시키지 않는 범위에서 HC 배출량을 줄이기 위하여, 산출 수단(38)에서는 희박측으로의 반전시용의 초기치와 감소율을 PSLO와 △PSL로 하고 농밀측으로의 반전시용의 초기치와 감소율을 PSRO와 △PSR로 하여 PSLOPSRO이고 △PSL△PSR이며 △PSL/△PSRPSLO/PSRO로 되도록 PSLO와 PSRO 및 △PSL과 △PSR를 각각 시동시의 배기 온도 상당치에 따라 설정하고, 이렇게 설정된 PSLO와 △PSL또는 PSRO와 △PSR보다 초기치로부터 시동후의 시간경과와 함께 감소하는 값을 희박측으로의 반전시용과 농밀측으로의 반전시용으로서 별도의 난기시의 보정량(PSL,PSR)의 산출수단(39)이 산출한다. 이러한 난기시의 보정량(PSL,PSR)을 촉매의 활성상태에서 맞춘 단계치에 가산해서 희박측으로의 반전시용과 농밀측으로의 반전시용으로 별도의 단계치(PL,PR)의 산출수단(40)이 산출한다.In the present invention, in order to reduce HC emissions in a range that does not increase NOx emissions immediately after start-up, the calculation means 38 sets the initial value and the reduction rate at the time of reversal to the lean side to PSLO and ΔP SL , PSLO, PSRO, and ΔP SL and ΔP SR at the start-up temperature to set PSLO and ΔP SR as PSLOPSRO, ΔP SL ΔP SR, and ΔP SL / ΔP SR PSLO / PSRO respectively. The amount of correction at the time of reversal to the lean side and to the dense side is a value that is set according to the equivalent value and decreases with time elapsed after starting from PSLO and ΔP SL or PSRO and ΔP SR. The calculation means 39 of (PSL, PSR) calculates. The amount of correction (PSL, PSR) at the time of turbulence is added to the step values matched in the active state of the catalyst, and the calculation means 40 for calculating the step values PL, PR for the reversal to the lean side and the reversal to the dense side is performed. Calculate.

Description

기관의 공연비제어장치Engine air-fuel ratio control device

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

제1도는 본 발명의 내용을 전체적으로 도시한 흐름도.1 is a flow diagram generally illustrating the contents of the present invention.

제2도는 본 발명의 한 실시예의 시스템을 도시한 도면.2 illustrates a system of one embodiment of the present invention.

제3도는 공연비의 피드백 보정계수(α)의 연산을 설명하기 위한 흐름도.3 is a flowchart for explaining the calculation of the feedback correction coefficient α of the air-fuel ratio.

Claims (1)

3원 촉매의 상류의 배기관에 위치하는 O2감지기와, 이러한 O2감지기의 활성화의 시기로부터 공연비의 피드백보정을 개시시키는 수단과, 이러한 공연비의 피드백보정의 개시시로부터 상기 O2감지기의 출력을 받아서 공연비가 농밀측과 희박측의 어디에 있는지를 판정하는 수단과, 이러한 판정결과로부터 희박측으로 반전한 것인지 또는 농밀측으로 반전한 것인지를 판정하는 수단과, 이러한 2개의 판정결과로부터 반전시에는 3원 촉매의 활성상태에서 맞춘 단계치를 운전조건에 따라 산출하는 수단과, 상기 2개의 판정결과로부터 반전시를 제외하고는 적분치(I)를 산출하는 수단과, 시동시로부터의 경과시간(Tas)을 계측하는 수단과, 희박측으로의 반전시용의 난기시의 보정량의 초기치(PSLO)가 농밀측으로의 반전시용의 난기시의 보정량의 초기치(PSRO)보다 커지고 상기 희박측으로의 반전시용의 감소율(△PSL)이 상기 농밀측으로의 반전시용의 감소율(△PSR)보다 커지며 상기 희박측으로의 반전시용의 감소율과 농밀측으로의 반전시용의 감소율과의 비율(△PSL△PSR)이 상기 희박측으로의 반전시용의 초기치와 농밀측으로의 반전시용의 초기치의 비율(PSLO/PSRO)보다 커지고 희박측으로의 반전시용의 초기치(PSLO)와 감소율(△PSL) 및 농밀측으로의 반전시용의 초기치(PSRO)와 감소율(△PSR)을 각각 시동시의 배기온도상당치에 따라 설정하는 수단과, 이렇게 설정된 희박측으로의 반전시용의 초기치(PSLO)와 감소율(△PSL) 및 상기 시동시로부터의 경과시간(Tas)보다 초기치(PSLO)로부터의 시동후의 시간경과와 함께 감소하는 값을 희박측으로의 운전시용의 난기시의 보정량(PSL)으로 삼고 농밀측으로의 반전시용의 초기치(PSRO)와 감소율(△PSR) 및 상기 시동시로부터의 경과시간(Tas)보다 초기치(PSRO)로부터의 시동후의 시간경과와 함께 감소하는 값을 농밀측으로의 반전시용의 난기시의 보정량(PSR)으로 삼아서 각각 산출하는 수단과, 이러한 난기시의 보정량(PSL,PSR)을 상기 3원 촉매의 활성상태에서 맞춘 단계치에 가산해서 희박측으로의 반전시용의 단계치(PL)와 농밀측으로의 반전시용의 단계치(PR)를 구별해서 산출하는 수단)과, 이렇게 구별해서 산출된 단계치(PL,PR)를 이용해서 희박측으로의 반전시에는 희박측으로의 반전시용의 단계치(PL)를 경신량으로 삼고 농밀측으로의 반전시에는 농밀측으로의 반전시용의 단계치(PR)를 경신량으로 삼으며 이러한 반전시를 제외하고는 상기 적분치(I)를 경신량으로 삼아서 공연비의 피드백보정량(α)를 산출하는 수단과, 이러한 공연비의 피드백보정량(α)으로 운전조건에 따른 기본분사량(Tp)을 보정해서 연료분사량을 산출하는 수단 및, 이러한 분사량의 연료를 흡기관에 공급하는 장치를 설치한 것을 특징으로 하는 기관의 공연비제어장치.And the O 2 sensor which is located upstream of an exhaust pipe of a three-way catalyst, an output of the O 2 sensor from the time of activation of this O 2 sensor from the time of means for starting the feedback correction of the air-fuel ratio, and the start of the feedback correction of such air-fuel ratio Means for determining whether the air-fuel ratio is on the dense side and the lean side; and means for determining whether the inverted side is inverted to the lean side or the dense side from the determination result, and a three-way catalyst at the time of inversion from these two determination results. Means for calculating the step values set in the active state according to the operating conditions, means for calculating the integral value (I) except for the inversion at the two determination results, and elapsed time (Tas) from the start time. The initial value (PSRO) of the correction amount at the time of reversal at the time of reversal to the lean side, and the initial value (PSRO) of the correction amount at the time of reversal at the time of reversal to the dense side The larger reduction ratio of the reverse Application of the side of the lean (△ P SL) ratio of the reduction ratio of the reverse Application of the side of the reduction rate of the reverse Application of the side of the dense (△ P SR) than becomes large rate of decrease of the reverse Application of the side of the lean and dense (ΔP SL ΔP SR ) is larger than the ratio (PSLO / PSRO) of the initial value for the reversal to the lean side and the reversal to the dense side, and the initial value (PSLO) and the reduction rate (ΔP SL ) for the reversal to the lean side. ) And means for setting the initial value (PSRO) and the reduction rate (ΔP SR ) at the time of reversal to the dense side according to the exhaust temperature equivalence value at the start, respectively, and the initial value (PSLO) and the reduction rate (△ P SL ) and a value that decreases with the time elapsed after starting from the initial value PSLO than the elapsed time Ta from the start as the correction amount PSL for warming up on the lean side, and is reversed to the dense side. city At the time of reversal at the time of reversal to the dense side, the value which decreases with the initial value PSRO and the reduction rate (ΔP SR ) of the dragon and the time elapsed after starting from the initial value PSRO than the elapsed time Tas from the start time. A means for calculating each of the correction amounts PSR, and the correction values PSL and PSR during turbulence are added to the step values set in the active state of the three-way catalyst, and the step values PL and dense at the time of inversion to the lean side. Means for distinguishing and calculating the step value PR for inversion to the side) and the step value for inversion to the lean side in the inversion to the lean side using the step values PL and PR calculated in this manner. ) Is used as the renewal amount, and when reversing to the dense side, the step value (PR) for reversal to the dense side is used as the renewal amount, and the integral value (I) is used as the renewal amount except for this reversal. Means for calculating the correction amount α, The air-fuel ratio of an engine characterized by providing a fuel injection amount by correcting the basic injection amount Tp according to the operating conditions by the feedback correction amount α of the air-fuel ratio, and a device for supplying fuel of this injection amount to the intake pipe. Control unit. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940023292A 1994-09-15 1994-09-15 Apparatus for controlling air fuel ratio of an engine KR0145367B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019940023292A KR0145367B1 (en) 1994-09-15 1994-09-15 Apparatus for controlling air fuel ratio of an engine

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Application Number Priority Date Filing Date Title
KR1019940023292A KR0145367B1 (en) 1994-09-15 1994-09-15 Apparatus for controlling air fuel ratio of an engine

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KR960011095A true KR960011095A (en) 1996-04-20
KR0145367B1 KR0145367B1 (en) 1998-08-17

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200001923A (en) 2018-06-28 2020-01-07 주식회사 삼양사 Hard candy containing malto oligosaccharides
WO2021086080A1 (en) * 2019-10-29 2021-05-06 주식회사 삼양사 Method for producing maltotetraose-containing oligosaccharides

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200001923A (en) 2018-06-28 2020-01-07 주식회사 삼양사 Hard candy containing malto oligosaccharides
WO2021086080A1 (en) * 2019-10-29 2021-05-06 주식회사 삼양사 Method for producing maltotetraose-containing oligosaccharides

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KR0145367B1 (en) 1998-08-17

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