KR970028510A - Apparatus and method for detecting purification performance of automobile catalytic converter - Google Patents

Apparatus and method for detecting purification performance of automobile catalytic converter Download PDF

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Publication number
KR970028510A
KR970028510A KR1019950043266A KR19950043266A KR970028510A KR 970028510 A KR970028510 A KR 970028510A KR 1019950043266 A KR1019950043266 A KR 1019950043266A KR 19950043266 A KR19950043266 A KR 19950043266A KR 970028510 A KR970028510 A KR 970028510A
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KR
South Korea
Prior art keywords
catalytic converter
output
purification performance
detecting
performance
Prior art date
Application number
KR1019950043266A
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Korean (ko)
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KR100204783B1 (en
Inventor
정훈
Original Assignee
한승준
기아자동차 주식회사
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Priority to KR1019950043266A priority Critical patent/KR100204783B1/en
Publication of KR970028510A publication Critical patent/KR970028510A/en
Application granted granted Critical
Publication of KR100204783B1 publication Critical patent/KR100204783B1/en

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Classifications

    • 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
    • F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
    • 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
    • F01N9/00—Electrical control of exhaust gas treating apparatus
    • 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
    • F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
    • F01N2560/02—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor
    • F01N2560/025—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting O2, e.g. lambda sensors
    • 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
    • F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
    • F01N2560/14—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics having more than one sensor of one kind
    • 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
    • F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/04—Methods of control or diagnosing
    • F01N2900/0416—Methods of control or diagnosing using the state of a sensor, e.g. of an exhaust gas sensor

Abstract

본 발명은 촉매컨버터의 입출력부에 설치되는 산소센서의 감지전압에 대한 진폭변화를 통해 촉매컨버터의 정화성능을 감지하여 규정성능 이하시 경고신호를 송출하도록 하는 자동차 촉매컨버터의 정화성능 검출장치와 그 방법에 관한 것으로, 촉매컨버터(10)의 전방과 후방에서 배기가스의 산소농도를 검출할 수 있는 산소센서(12,14)를 설치하고, 각각의 산소센서(12,14)로부터 출력되는 감지신호는 하이패스필터(20,22)에 의해 저전압측 이하부분을 삭제하므로써 산소센서 출력의 변동폭만을 나타내도록 하고 다음 절대치변환기(24,26)에서 정류처리하여 변동폭의 1/2크기의 절대값으로 표시되도록 하고, 이후 로우패스필터(28,30)를 사용하여 여러 사이클의 평균적인 변동폭의 크기를 출력하도록 한 후 제산기(34)에 의해 최종적으로 촉매 전방대비 촉매 후방의 진폭비율을 산출하여 엔진콘트롤유니트(34)로 입력시키고, 엔진콘트롤유니트(34)에서는 설정조건과 비교하여 설정조건에 부합되지 않는 경우 경고등(36)을 작동시키도록 이루어진 발명임.The present invention is to detect the purification performance of the catalytic converter through the amplitude change of the detection voltage of the oxygen sensor installed in the input and output of the catalytic converter and the purification performance detection device of the automotive catalytic converter to send a warning signal when the specified performance is below The method relates to the installation of oxygen sensors (12, 14) capable of detecting the oxygen concentration of the exhaust gas in front and rear of the catalytic converter (10), the detection signal output from each oxygen sensor (12, 14) By using the high-pass filter 20,22, the lower part of the low voltage side is removed so that only the fluctuation range of the oxygen sensor output is shown, and the rectification process is performed on the next absolute value converter 24,26 to display the absolute value of the magnitude of the fluctuation range. The low pass filters 28 and 30 are then used to output the magnitude of the average fluctuation of several cycles, and then the divider 34 is finally used to rear the catalyst relative to the catalyst front. Calculate the amplitude ratio of the input to the engine control unit 34, the engine control unit 34 is an invention made to operate the warning light 36 when the setting conditions are not compared to the setting conditions.

Description

자동차 촉매컨버터의 정화성능 검출장치와 그 방법Apparatus and method for detecting purification performance of automobile catalytic converter

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

제1도는 본 발명에 따른 산소센서의 설치상태를 설명하기 위한 도면.1 is a view for explaining the installation state of the oxygen sensor according to the present invention.

제2도 (a)는 촉매컨버터의 성능이 양호한 경우에 대한 산소센서 감지파형도, (b)는 촉매컨버터의 성능이 저하된 경우에 대한 산소센서 감지파형도.Figure 2 (a) is the oxygen sensor detection waveform for the case where the catalytic converter performance is good, (b) is an oxygen sensor detection waveform for the case where the performance of the catalytic converter is reduced.

제3도는 본 발명에 따른 구성도.3 is a block diagram according to the present invention.

제4도는 본 발명에 따른 촉매컨버터의 정화성능 검출방법을 설명하기 위한 흐름도이다.4 is a flowchart illustrating a purification performance detection method of the catalytic converter according to the present invention.

Claims (5)

배기계통에 설치되어 있는 촉매컨버터(10)의 전방과 후방에 각각 산소센서(12)(14)를 설치하고, 상기 산소센서(12)(14)의 출력단에는 선형필터(16,18)와 하이패스필터(20,22), 절대치변환기(24,26) 및 로우패스필터(28,30)를 차례로 매개하여 제산기(32)를 연결하며, 상기 제산기(32)의 출력단에는 엔진콘트롤유니트(34)의 데이타입력단을 연결하는 한편 그 출력단에 경고등(36)을 연결하여서 된 자동차 촉매컨버터의 정화성능 검출장치.Oxygen sensors 12 and 14 are installed at the front and rear of the catalytic converter 10 installed in the exhaust system, respectively, and linear filters 16 and 18 and high at the output ends of the oxygen sensors 12 and 14 are provided. A divider 32 is connected via a pass filter 20, 22, an absolute value converter 24, 26, and a low pass filter 28, 30, and an engine control unit is connected to an output terminal of the divider 32. 34. A purifying performance detecting device for a catalytic converter in which a data input terminal of 34) is connected and a warning lamp 36 is connected to the output terminal thereof. 촉매컨버터(10)의 전후방에 설치되는 산소센서(12,14)의 출력신호를 이용하여 촉매컨버터(10) 후방 대비 전방의 산소농도 검출신호에 대한 진폭비율을 산출하는 단계와, 상기 진폭비율에서 측정당시의 자동차의 조건에 따라 설정해 놓은 진폭비율임계치를 감산하여 그 값이 (+)이면 해당 임계치매트릭스영역에 그 값을 표시하고 계수값을 "1"만큼 증가시키는 단계로 이루어진 자동차 촉매컨버터의 정화성능 검출방법.Calculating an amplitude ratio with respect to the oxygen concentration detection signal in the front of the catalytic converter 10 using the output signals of the oxygen sensors 12 and 14 installed in front and rear of the catalytic converter 10, and in the amplitude ratio Purification of automobile catalytic converter consisting of subtracting the amplitude ratio threshold set according to the condition of the vehicle at the time of measurement and displaying the value in the corresponding threshold matrix area and increasing the coefficient value by "1". Performance detection method. 제2항에 있어서, 상기 계수값이 9이상이면 오류판정을 하도록 되어 있는 자동차 촉매 컨버터의 정화성능 검출방법.3. The method of detecting the purification performance of an automobile catalytic converter according to claim 2, wherein an error is determined when the count value is 9 or more. 제3항에 있어서, 오류판정시 고장코드를 저장하도록 하는 자동차 촉매컨버터의 정화성능 검출방법.4. The method according to claim 3, wherein the fault code is stored when an error is determined. 제3항에 있어서, 오류판정이 연속 2회인 경우 경고등을 점등시키도록 하는 자동차 촉매컨버터의 정화성능 검출방법.4. The method for detecting the purification performance of an automobile catalytic converter according to claim 3, wherein the warning lamp is turned on when the error determination is two consecutive times. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950043266A 1995-11-23 1995-11-23 Apparatus for detecting performance of purification of automobile catalytic converter KR100204783B1 (en)

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Application Number Priority Date Filing Date Title
KR1019950043266A KR100204783B1 (en) 1995-11-23 1995-11-23 Apparatus for detecting performance of purification of automobile catalytic converter

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KR1019950043266A KR100204783B1 (en) 1995-11-23 1995-11-23 Apparatus for detecting performance of purification of automobile catalytic converter

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KR970028510A true KR970028510A (en) 1997-06-24
KR100204783B1 KR100204783B1 (en) 1999-06-15

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200076625A (en) * 2018-12-19 2020-06-29 비테스코 테크놀로지스 게엠베하 Method and device for diagnosis of a particle filter arranged in the exhaust gas system of a petrol-operated internal combustion engine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200076625A (en) * 2018-12-19 2020-06-29 비테스코 테크놀로지스 게엠베하 Method and device for diagnosis of a particle filter arranged in the exhaust gas system of a petrol-operated internal combustion engine

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