KR960038064A - Estimation device and estimation method for catalyst temperature of vehicle - Google Patents

Estimation device and estimation method for catalyst temperature of vehicle Download PDF

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KR960038064A
KR960038064A KR1019950009055A KR19950009055A KR960038064A KR 960038064 A KR960038064 A KR 960038064A KR 1019950009055 A KR1019950009055 A KR 1019950009055A KR 19950009055 A KR19950009055 A KR 19950009055A KR 960038064 A KR960038064 A KR 960038064A
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amount
temperature
estimating
exhaust purification
purification catalyst
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KR1019950009055A
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Korean (ko)
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KR100232704B1 (en
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도미사와 나오끼
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야스모토 도시오
유니시아 젝스 코포레이션
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Toxicology (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

본 발명은 차량엔진에 비치된 배기정화촉매의 온도를 간편하고도 고정밀도로 추정하는 기술에 관계된다.The present invention relates to a technique for easily and accurately estimating the temperature of an exhaust purification catalyst provided in a vehicle engine.

구체적으로 시동시의 냉각수도온도 Tws를 외기온도 상당치라 보고, 그 시동시의 냉각수온도 Tws와 차량속도 VSP에 의거하여 촉매로부터의 방열량 Tm을 추정한다, 그리고 그 발열량 Tm의 시간적분치 STm을 산출한다. 한편, 엔진의 흡입공기량 Q를 배기량 상당치로 간주하고, 상기 흡입공기량 Q에 의거하여 배기로부터 촉매가 흡열하는 수열량 Tp를 추정한다. 그리고 상기 수열량 Tp의 시간적분치 STp를 산출한다. 여기서, 상기 수열량 STp에서 방열량 STm을 감산하여, 촉매에 유지되는 열량 X를 산출하고, 그 열량 X와 소정치를 비교하는 것으로, 촉매가 활성온도에 달하고 있는가 아닌가를 추정하게 된다.Specifically, the cooling water temperature Tws at the start is regarded as the outside temperature equivalent, and the heat radiation amount Tm from the catalyst is estimated based on the cooling water temperature Tws at the start and the vehicle speed VSP, and the time integral STm of the calorific value Tm is calculated. . On the other hand, the intake air amount Q of the engine is regarded as the displacement equivalent value, and on the basis of the intake air amount Q, the hydrothermal amount Tp that the catalyst absorbs heat from the exhaust is estimated. The time integral STp of the hydrothermal amount Tp is calculated. Here, by subtracting the heat radiation amount STm from the hydrothermal amount STp, the calorific value X held by the catalyst is calculated, and by comparing the calorie value X with a predetermined value, it is estimated whether or not the catalyst has reached the active temperature.

Description

차량의 촉매온도 추정장치 및 추정방법Estimation device and estimation method for catalyst temperature of vehicle

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

제1도는 본 발명의 구성을 보인 기능 블록도, 제2도는 본 발명의 일실시예를 보인 시스템도, 제3도는 실시예에 있어서의 촉매온도의 추정제어를 보인 흐름도.1 is a functional block diagram showing the configuration of the present invention, FIG. 2 is a system diagram showing one embodiment of the present invention, and FIG. 3 is a flowchart showing estimation control of the catalyst temperature in the embodiment.

Claims (6)

엔진배기통로에 설치된 배기정화촉매의 온도를 추정하는 차량의 촉매온도 추정장치로서, 시동시에서의 엔진의 냉각수온도를 검출하는 시동시 수온 검출수단과, 차량의 주행속도를 검출하는 차량속도 검출수단과, 엔진의 흡기량을 검출하는 흡기량 검출수단과, 상기 검출된 시동시의 냉각수온도, 차량의 주행속도 및 엔진의 흡기량에 의거하여 상기 배기정화촉매의 온도를 추정하는 촉매온도 추정수단을 포함하여 구성되는 것을 특징으로 하는 차량의 촉매온도 추정장치.A catalyst temperature estimating apparatus for a vehicle estimating the temperature of an exhaust purification catalyst installed in an engine exhaust passage, the apparatus comprising: a startup water temperature detection means for detecting a coolant temperature of an engine at startup and a vehicle speed detection means for detecting a running speed of a vehicle And an intake air amount detecting means for detecting the intake air amount of the engine, and a catalyst temperature estimating means for estimating the temperature of the exhaust purification catalyst based on the detected coolant temperature at the start, the traveling speed of the vehicle, and the intake air amount of the engine. Catalyst temperature estimation apparatus for a vehicle, characterized in that the. 제1항에 있어서, 상기 촉매온도 추정수단이 상기 검출된 시동시의 냉각수온도 및 차량의 주행속도에 의거하여 상기 배기정화촉매에 의해서 빼앗기는 열량을 추정하는 방열량 추정수단과, 상기 검출된 엔진의 흡기량에 의거하여 상기 배기정화촉매가 엔진의 배기로부터 흡열하는 열량을 추정하는 수열량 추정수단과, 상기 방열량 추정수단 및 수열량 추정수단에서의 추정결과에 의거 하여 상기 배기정화촉매의 온도를 추정하는 열량에 의한 촉매온도 추정수단을 포함하여 구성되는 것을 특징으로 하는 차량의 촉매온도 추정장치.The heat dissipation amount estimating means according to claim 1, wherein the catalyst temperature estimating means estimates the amount of heat deprived by the exhaust purification catalyst based on the detected coolant temperature at the start-up and the traveling speed of the vehicle, and the detected air intake amount of the engine. Hydrothermal amount estimating means for estimating the amount of heat absorbed by the exhaust purification catalyst from the exhaust of the engine based on the heat sink; and calorific value for estimating the temperature of the exhaust purification catalyst based on the estimation results of the heat dissipation amount estimating means and the hydrothermal amount estimating means; A catalyst temperature estimation apparatus for a vehicle, comprising the catalyst temperature estimating means. 제2항에 있어서, 상기 열량에 의한 촉매온도 추정수단이 상기 수열량 추정수단으로 추정된 열량의 적분치에서 상기 방열량 추정수단으로 추정된 열량의 적분치를 감산한 열량을 상기 배기정화촉매의 온도에 상관하는 값으로서 연산하는 것을 특징으로 하는 차량의 촉매온도 추정장치.The heat quantity obtained by subtracting the integral value of the heat quantity estimated by the heat dissipation amount estimating means from the integral value of the heat quantity estimated by the hydrothermal amount estimating means to the temperature of the exhaust purification catalyst. An apparatus for estimating catalyst temperature of a vehicle, characterized in that it is calculated as a correlated value. 엔진 배기통로에 설치된 배기정화촉매의 온도를 추정하는 차량의 촉매온도 추정방법으로서, 시동시에서의 엔진의 냉각수 온도를 검출하는 단계와 차량의 주행속도를 검출하는 단계와 엔진의 흡기량을 검출하는 단계와, 상기 검출된 시동시의 냉각수온도, 차량의 주행속도 및 엔진의 흡기량에 의거하여 상기 배기정화촉매의 온도를 추정하는 단계를 포함하여 구성되는 것을 특징으로 하는 차량의 촉매온도 추정방법A method for estimating a catalyst temperature of a vehicle for estimating the temperature of an exhaust purification catalyst installed in an engine exhaust passage, the method comprising: detecting a coolant temperature of an engine at startup, detecting a running speed of a vehicle, and detecting an intake amount of an engine And estimating the temperature of the exhaust purification catalyst based on the detected coolant temperature at the start, the traveling speed of the vehicle, and the intake amount of the engine. 제4항에 있어서, 상기 배기정화촉매의 온도를 추정하는 단계가 상기 검출된 시동시의 냉각수온도 및 차량의 주행속도에 의거하여 상기 배기정화촉매에 의해서 빼앗기는 열량을 추정하는 단계와, 상기 검출된 엔지의 흡기량에 의거하여 상기 배기정화촉매가 엔진의 배기로부터 흡열하는 열량을 추정하는 단계와, 상기 추정된 배기정화촉매에 의해서 빼앗기는 열량과 상기 배기정화촉매가 엔진의 배기에서 흡열하는 열량에 의거하여 상기, 배기정화촉매의 온도를 추정하는 단계를 포함하여 구성되는 것을 특징으로 하는 차량의 촉매온도 추정방법.The method of claim 4, wherein estimating the temperature of the exhaust purification catalyst comprises estimating the amount of heat deprived by the exhaust purification catalyst based on the detected coolant temperature at the start-up and the traveling speed of the vehicle; Estimating the amount of heat that the exhaust purification catalyst absorbs from the exhaust of the engine based on the engine intake amount, and based on the amount of heat deprived by the estimated exhaust purification catalyst and the amount of heat that the exhaust purification catalyst absorbs in the exhaust of the engine. And estimating the temperature of the exhaust purification catalyst. 제5항에 있어서, 상기 열량에 의거하여, 상기 배기정화촉매의 온도를 추정하는 단계가, 상기 배기정화촉매가 엔진의 배기로부터 흡열하는 열량의 적분치에서 상기 배기정화촉매로 빼앗기는 열량의 적분치를 감산한 열량을 상기 배기정화촉매의 온도에 상관하는 값으로서 연산하는 단계를 포함하는 것을 특징으로 하는 차량의 촉매온도 추정방법.6. The method of claim 5, wherein estimating the temperature of the exhaust purification catalyst on the basis of the calorific value comprises: an integral value of the amount of heat deprived by the exhaust purification catalyst from the integral value of the amount of heat absorbed by the exhaust purification catalyst from the exhaust of the engine. And calculating the subtracted heat amount as a value correlated with the temperature of the exhaust purification catalyst.
KR1019950009055A 1995-04-18 1995-04-18 Method and apparatus for estimating catalytic temperature of a vehicle KR100232704B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100254379B1 (en) * 1997-07-10 2000-05-01 정몽규 Exhaust gas temperature estimation method

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KR101791754B1 (en) 2015-12-24 2017-10-30 주식회사 현대케피코 Method for exhaust temperature modeling of vehicle, and device and method for exhaust temperature estimating of vehicle

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JPS6261919U (en) * 1985-10-07 1987-04-17

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100254379B1 (en) * 1997-07-10 2000-05-01 정몽규 Exhaust gas temperature estimation method

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