JPS6445913A - Catalyst deterioration diagnosing device for internal combustion engine - Google Patents

Catalyst deterioration diagnosing device for internal combustion engine

Info

Publication number
JPS6445913A
JPS6445913A JP62200232A JP20023287A JPS6445913A JP S6445913 A JPS6445913 A JP S6445913A JP 62200232 A JP62200232 A JP 62200232A JP 20023287 A JP20023287 A JP 20023287A JP S6445913 A JPS6445913 A JP S6445913A
Authority
JP
Japan
Prior art keywords
catalyst converter
trouble
fuel ratio
ratio sensors
catalyst
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP62200232A
Other languages
Japanese (ja)
Inventor
Osamu Horie
Akira Takahashi
Toru Hashimoto
Mitsuhiro Miyake
Hideaki Katashiba
Yasuyuki Makikawa
Minoru Nishida
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Mitsubishi Motors Corp
Original Assignee
Mitsubishi Electric Corp
Mitsubishi Motors Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp, Mitsubishi Motors Corp filed Critical Mitsubishi Electric Corp
Priority to JP62200232A priority Critical patent/JPS6445913A/en
Publication of JPS6445913A publication Critical patent/JPS6445913A/en
Pending legal-status Critical Current

Links

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
    • F01N11/007—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring oxygen or air concentration downstream of the exhaust 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
    • F01N2550/00—Monitoring or diagnosing the deterioration of exhaust systems
    • F01N2550/02—Catalytic activity of catalytic converters
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Abstract

PURPOSE:To suppress an amount of a noxious exhaust gas component, diffused in the open air, to a minimum value, by a method wherein a plurality of linear air-fuel ratio sensors are disposed before and after a catalyst converter connected to the exhaust pipe of an engine, and monitors an exhaust gas state to discriminate deterioration of a catalyst. CONSTITUTION:A catalyst converter 2 connected to an exhaust pipe 1 of an engine E, and linear air-fuel ratio sensors 3 and 4 are disposed on the upper stream side and the down stream side, respectively, of a catalyst converter 2. After detecting signals from the linear air-fuel ratio sensors 3 and 4 are shaped and amplified by signal processing means 5 and 6, respectively, the detecting signals are compared with each other by means of a trouble diagnosing means 7 to diagnose a trouble on the catalyst converter 2, and the trouble is converted into sound and light by means of a trouble alarming means 8 to alarm it to an operator. This constitution enables rapid detection of deterioration of performance of the catalyst converter 2, and suppression of an amount of a noxious gas component, diffused in the open air, to a minimum value.
JP62200232A 1987-08-11 1987-08-11 Catalyst deterioration diagnosing device for internal combustion engine Pending JPS6445913A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62200232A JPS6445913A (en) 1987-08-11 1987-08-11 Catalyst deterioration diagnosing device for internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62200232A JPS6445913A (en) 1987-08-11 1987-08-11 Catalyst deterioration diagnosing device for internal combustion engine

Publications (1)

Publication Number Publication Date
JPS6445913A true JPS6445913A (en) 1989-02-20

Family

ID=16421007

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62200232A Pending JPS6445913A (en) 1987-08-11 1987-08-11 Catalyst deterioration diagnosing device for internal combustion engine

Country Status (1)

Country Link
JP (1) JPS6445913A (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5077970A (en) * 1990-06-11 1992-01-07 Ford Motor Company Method of on-board detection of automotive catalyst degradation
US5090199A (en) * 1989-12-14 1992-02-25 Nippondenso Co., Ltd. Apparatus for controlling air-fuel ratio for engine
US5154055A (en) * 1990-01-22 1992-10-13 Nippondenso Co., Ltd. Apparatus for detecting purification factor of catalyst
US5157921A (en) * 1990-04-11 1992-10-27 Ngk Spark Plug Co., Ltd. Method for measuring conversion efficiency of catalyst and detecting deterioration thereof with air/fuel ratio sensors
US5177959A (en) * 1990-03-28 1993-01-12 Robert Bosch Gmbh Method and arrangement for monitoring the conversion rate of a catalyzer in the exhaust-gas system of an internal combustion engine
US5265416A (en) * 1992-08-27 1993-11-30 Ford Motor Company On-board catalytic converter efficiency monitoring
US5289678A (en) * 1992-11-25 1994-03-01 Ford Motor Company Apparatus and method of on-board catalytic converter efficiency monitoring
US5319921A (en) * 1992-08-04 1994-06-14 Ford Motor Company Catalytic converter efficiency monitoring
US5337555A (en) * 1991-12-13 1994-08-16 Mazda Motor Corporation Failure detection system for air-fuel ratio control system
US5357750A (en) * 1990-04-12 1994-10-25 Ngk Spark Plug Co., Ltd. Method for detecting deterioration of catalyst and measuring conversion efficiency thereof with an air/fuel ratio sensor
US5492066A (en) * 1993-07-30 1996-02-20 Shinko Electric Co., Ltd. Transport system
US5664503A (en) * 1994-07-27 1997-09-09 Shinko Electric Co., Ltd. Container for linear motor driven transport system
JP2014521077A (en) * 2011-07-08 2014-08-25 ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング Monitoring the functionality of the breath analyzer analyzer

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5090199A (en) * 1989-12-14 1992-02-25 Nippondenso Co., Ltd. Apparatus for controlling air-fuel ratio for engine
US5154055A (en) * 1990-01-22 1992-10-13 Nippondenso Co., Ltd. Apparatus for detecting purification factor of catalyst
US5177959A (en) * 1990-03-28 1993-01-12 Robert Bosch Gmbh Method and arrangement for monitoring the conversion rate of a catalyzer in the exhaust-gas system of an internal combustion engine
US5157921A (en) * 1990-04-11 1992-10-27 Ngk Spark Plug Co., Ltd. Method for measuring conversion efficiency of catalyst and detecting deterioration thereof with air/fuel ratio sensors
US5357750A (en) * 1990-04-12 1994-10-25 Ngk Spark Plug Co., Ltd. Method for detecting deterioration of catalyst and measuring conversion efficiency thereof with an air/fuel ratio sensor
US5077970A (en) * 1990-06-11 1992-01-07 Ford Motor Company Method of on-board detection of automotive catalyst degradation
US5337555A (en) * 1991-12-13 1994-08-16 Mazda Motor Corporation Failure detection system for air-fuel ratio control system
US5414995A (en) * 1991-12-13 1995-05-16 Mazda Motor Corporation Failure detection system for air-fuel ratio control system
US5319921A (en) * 1992-08-04 1994-06-14 Ford Motor Company Catalytic converter efficiency monitoring
US5265416A (en) * 1992-08-27 1993-11-30 Ford Motor Company On-board catalytic converter efficiency monitoring
US5289678A (en) * 1992-11-25 1994-03-01 Ford Motor Company Apparatus and method of on-board catalytic converter efficiency monitoring
US5492066A (en) * 1993-07-30 1996-02-20 Shinko Electric Co., Ltd. Transport system
US5582107A (en) * 1993-07-30 1996-12-10 Shinko Electric Co. Ltd. Weighing device for linear motor driven transport system
US5664503A (en) * 1994-07-27 1997-09-09 Shinko Electric Co., Ltd. Container for linear motor driven transport system
JP2014521077A (en) * 2011-07-08 2014-08-25 ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング Monitoring the functionality of the breath analyzer analyzer
US9329161B2 (en) 2011-07-08 2016-05-03 Robert Bosch Gmbh Monitoring of the functionality of a converter of a breath analysis apparatus

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