ES2068751A1 - Method and device for discriminating state of catalyst - Google Patents

Method and device for discriminating state of catalyst

Info

Publication number
ES2068751A1
ES2068751A1 ES09300678A ES9300678A ES2068751A1 ES 2068751 A1 ES2068751 A1 ES 2068751A1 ES 09300678 A ES09300678 A ES 09300678A ES 9300678 A ES9300678 A ES 9300678A ES 2068751 A1 ES2068751 A1 ES 2068751A1
Authority
ES
Spain
Prior art keywords
catalyst
detector
composite section
exhaust
comparing
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.)
Granted
Application number
ES09300678A
Other languages
Spanish (es)
Other versions
ES2068751B1 (en
Inventor
Frank Blischke
Eberhard Schnaibel
Erich Schneider
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of ES2068751A1 publication Critical patent/ES2068751A1/en
Application granted granted Critical
Publication of ES2068751B1 publication Critical patent/ES2068751B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F01N11/007—Monitoring or diagnostic devices for exhaust-gas treatment apparatus 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
    • 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
    • F01N2900/0422—Methods of control or diagnosing measuring the elapsed time
    • 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

Landscapes

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

Abstract

PURPOSE: To accurately discriminate the quality of a catalyst by maintaining hyperoxia and oxygen deficiency to the catalyst at an average value until a composition of a gas mixture varies and increasing the same so as to estimate oxygen-storing ability of the catalyst. CONSTITUTION: In an internal combustion engine 3, fuel-metering means 1 is attached to a suction pipe 2, and exhaust sensors 4, 5 are arranged respectively before and behind a catalyst 6 in an exhaust pipe 7. Further, in addition to means 9 for comparing values detected by the exhaust sensors 4, 5 with a target value generated by means 10, a closed loop controller 11, multiplication means 12 and control means 13 are provided. In this case, a composite section 8 is provided. Furthermore, in the composite section 8, means 19 for comparing a threshold value of a detector 17 with a frequency of a detector 18, and means 20 for outputting a defect signal when the threshold is exceeded are disposed. Thus, defects of the catalyst 6 are discriminated.
ES09300678A 1992-04-03 1993-04-01 "PROCEDURE AND DEVICE TO RECOGNIZE THE STATUS OF A CATALYST" Expired - Lifetime ES2068751B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4211116A DE4211116A1 (en) 1992-04-03 1992-04-03 On-board detection of state of IC engine exhaust catalyser - increasing lean-rich cycle until exhaust gas probe signal indicates noticeable change to determine oxygen@ storage capacity

Publications (2)

Publication Number Publication Date
ES2068751A1 true ES2068751A1 (en) 1995-04-16
ES2068751B1 ES2068751B1 (en) 1995-11-16

Family

ID=6455919

Family Applications (1)

Application Number Title Priority Date Filing Date
ES09300678A Expired - Lifetime ES2068751B1 (en) 1992-04-03 1993-04-01 "PROCEDURE AND DEVICE TO RECOGNIZE THE STATUS OF A CATALYST"

Country Status (4)

Country Link
JP (1) JPH0626330A (en)
DE (1) DE4211116A1 (en)
ES (1) ES2068751B1 (en)
IT (1) IT1263842B (en)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2998575B2 (en) * 1994-10-20 2000-01-11 日産自動車株式会社 Catalyst deterioration diagnosis device for internal combustion engine
DE4441432A1 (en) * 1994-11-22 1996-05-23 Roth Technik Gmbh Arrangement for monitoring the functionality of catalysts and / or lambda probes
US5845489A (en) * 1995-11-08 1998-12-08 Denso Corporation Abnormality detector for air-fuel ratio control system
DE19630940C2 (en) * 1996-07-31 1999-03-04 Siemens Ag Procedure for checking the catalyst efficiency
DE19801815A1 (en) * 1998-01-19 1999-07-22 Volkswagen Ag Lean-burn i.c. engine exhaust gas cleaning process
DE19816175A1 (en) * 1998-04-14 1999-10-21 Degussa Procedure for checking the functionality of a nitrogen oxide storage catalytic converter
US6244047B1 (en) * 1998-10-02 2001-06-12 Ford Global Technologies, Inc. Method of purging lean NOx trap
DE19850338C2 (en) 1998-11-02 2001-11-22 Heraeus Electro Nite Int Method and device for checking and monitoring the aging of a catalytic converter in the exhaust gas of internal combustion engines and the emission of pollutants
DE19913901C2 (en) * 1999-03-26 2001-10-18 Siemens Ag Procedure for checking the functionality of a catalytic converter
DE10017931A1 (en) 2000-04-11 2001-12-06 Siemens Ag Method for diagnosing an exhaust gas purification system of a lambda-controlled internal combustion engine
GB2399178B (en) * 2003-03-06 2006-06-07 Ford Global Tech Llc Method of accurately estimating air to fuel ratio
DE102005004670B4 (en) 2005-02-02 2007-05-24 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Method for diagnosing the degree of aging of a catalyst arranged in the exhaust duct of an internal combustion engine
DE102005059894B4 (en) 2005-12-15 2019-07-25 Robert Bosch Gmbh Method for measuring the oxygen storage capacity of an emission control system
JP4915220B2 (en) 2006-11-24 2012-04-11 富士通株式会社 Mobile terminal device
JP4221026B2 (en) 2006-12-25 2009-02-12 三菱電機株式会社 Air-fuel ratio control device for internal combustion engine
JP4221025B2 (en) * 2006-12-25 2009-02-12 三菱電機株式会社 Air-fuel ratio control device for internal combustion engine
DE102009010021A1 (en) 2009-02-21 2010-09-02 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Simulation model for on-board diagnostics of degree of deterioration of catalyst arranged in exhaust pipe of internal combustion engine, has multiple characteristics for respective catalytic type
DE102010031654B4 (en) 2010-07-22 2023-10-05 Robert Bosch Gmbh Method for operating an internal combustion engine
JP5951068B1 (en) * 2015-04-14 2016-07-13 三菱電機株式会社 Air-fuel ratio control apparatus and air-fuel ratio control method for internal combustion engine
DE102021102456B3 (en) 2021-02-03 2022-05-19 Audi Aktiengesellschaft Method for operating a drive device and corresponding drive device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4007589A (en) * 1973-01-31 1977-02-15 Robert Bosch G.M.B.H. Internal combustion exhaust catalytic reactor monitoring system
US4622809A (en) * 1984-04-12 1986-11-18 Daimler-Benz Aktiengesellschaft Method and apparatus for monitoring and adjusting λ-probe-controlled catalytic exhaust gas emission control systems of internal combustion engines
EP0444783A1 (en) * 1990-02-13 1991-09-04 Lucas Industries Public Limited Company Exhaust gas catalyst monitoring
US5099646A (en) * 1990-07-16 1992-03-31 Toyota Jidosha Kabushiki Kaisha Air-fuel ratio feedback control system having a single air-fuel ratio sensor downstream of a three-way catalyst converter

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4007589A (en) * 1973-01-31 1977-02-15 Robert Bosch G.M.B.H. Internal combustion exhaust catalytic reactor monitoring system
US4622809A (en) * 1984-04-12 1986-11-18 Daimler-Benz Aktiengesellschaft Method and apparatus for monitoring and adjusting λ-probe-controlled catalytic exhaust gas emission control systems of internal combustion engines
EP0444783A1 (en) * 1990-02-13 1991-09-04 Lucas Industries Public Limited Company Exhaust gas catalyst monitoring
US5099646A (en) * 1990-07-16 1992-03-31 Toyota Jidosha Kabushiki Kaisha Air-fuel ratio feedback control system having a single air-fuel ratio sensor downstream of a three-way catalyst converter

Also Published As

Publication number Publication date
IT1263842B (en) 1996-09-04
ITMI930608A0 (en) 1993-03-30
JPH0626330A (en) 1994-02-01
DE4211116A1 (en) 1993-10-07
ITMI930608A1 (en) 1994-09-30
ES2068751B1 (en) 1995-11-16

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Legal Events

Date Code Title Description
FA2A Application withdrawn

Effective date: 19970218