WO2004053307A1 - Procede et dispositif pour le diagnostic d'unites catalytiques - Google Patents

Procede et dispositif pour le diagnostic d'unites catalytiques Download PDF

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Publication number
WO2004053307A1
WO2004053307A1 PCT/EP2003/013520 EP0313520W WO2004053307A1 WO 2004053307 A1 WO2004053307 A1 WO 2004053307A1 EP 0313520 W EP0313520 W EP 0313520W WO 2004053307 A1 WO2004053307 A1 WO 2004053307A1
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WO
WIPO (PCT)
Prior art keywords
exhaust gas
catalyst
value
lambda
exhaust
Prior art date
Application number
PCT/EP2003/013520
Other languages
German (de)
English (en)
Inventor
Ekkehard Pott
Axel Lang
Oliver Kirstein
Original Assignee
Volkswagen Ag
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 Volkswagen Ag filed Critical Volkswagen Ag
Publication of WO2004053307A1 publication Critical patent/WO2004053307A1/fr

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Classifications

    • 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
    • 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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
    • F01N13/0097—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series the purifying devices are arranged in a single housing
    • 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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/011—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more purifying devices arranged in parallel
    • 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
    • F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
    • F01N3/0814—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents combined with catalytic converters, e.g. NOx absorption/storage reduction catalysts
    • 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
    • F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
    • F01N3/0828—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents characterised by the absorbed or adsorbed substances
    • F01N3/0842—Nitrogen oxides
    • 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
    • F02D41/1439—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the position of the sensor
    • F02D41/1441—Plural sensors
    • 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
    • F02D41/1439—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the position of the sensor
    • F02D41/1441—Plural sensors
    • F02D41/1443—Plural sensors with one sensor per cylinder or group of cylinders
    • 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
    • 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
    • F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
    • F01N3/0828—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents characterised by the absorbed or adsorbed substances
    • F01N3/0864—Oxygen
    • 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

Definitions

  • the OSC is usually determined by subjecting a lambda value of the exhaust gas upstream of the catalytic converter to be monitored to a cyclical fluctuation between a rich (lambda ⁇ 1) and a lean (lambda> 1) phase around the value 1.0 and the lambda Signal downstream of the catalyst is compared with the lambda signal upstream of the catalyst. If the OSC is high, the oxygen stored in the catalytic converter can largely process the reducing agent supply in fat phases of the lambda fluctuation. The fluctuations in the lambda signal downstream of the catalytic converter are therefore relatively small.
  • the voltage signal from step response lambda probes which are arranged upstream and downstream of the catalytic converter to be monitored, can also be evaluated. Such probes do not make it possible to measure lambda values, but they do allow an evaluation of lambda jumps in a lean ⁇ fat or fat ⁇ lean transition. The lambda jumps correspond to voltage jumps in the probe signal.
  • the OSC is low; if the voltage jumps are far apart in time, the OSC is high. Furthermore, an arrangement of a broadband lambda probe for measuring the lambda value in front of the catalytic converter and a step response lambda probe behind the catalytic converter for determining the OSC are known.
  • a diagnostic method for a catalytic converter is already known, in which a pre-catalytic converter and a main catalytic converter are arranged one after the other in an exhaust pipe.
  • a bypass flap is connected over the main catalytic converter.
  • Probes arranged.
  • exhaust gas is routed through the pre- and main catalytic converter or only through the pre-catalytic converter and the composition of the exhaust gas is recorded in each case. This means that the condition of each catalytic converter and that of the entire system can be diagnosed.
  • a bypass valve is required instead of additional probes.
  • EP 0595 044 D1 Also known from EP 0595 044 D1 is a device for the operational detection of deterioration of a catalytic three-way converter of an internal combustion engine, two exhaust pipes, which are connected to groups of cylinders, merging into a common exhaust pipe.
  • the three-way catalytic converter is located in the common exhaust line or in each of the individual exhaust lines or in all.
  • synchronization detection means are provided for determining whether certain conditions are met or not. A diagnosis is carried out with one probe upstream of two pre-catalysts and one probe downstream of a main catalyst.
  • the object of the present invention is to provide a method and a device with which a diagnosis of catalyst units of a catalyst system for an exhaust system with N exhaust gas lines of an internal combustion engine can be carried out, which is precise and at the same time can be implemented inexpensively and in a structurally simple manner.
  • the catalyst units of at least N-1 exhaust lines are kept in an oxygen-free state for a predetermined time interval T by exposure to a stoichiometric or rich exhaust gas;
  • a value of an oxygen storage capacity is determined in a region of the common exhaust line by applying a lambda value excitation to the exhaust gas during the time interval T and evaluating an assigned lambda value reaction of the exhaust gas downstream of the exhaust gas merging and determines a catalyst diagnostic value depending on this value.
  • the method according to the invention also permits a precise diagnosis of a group of K catalyst units with only one sensor arranged in a region of the common exhaust line for evaluating the lambda reaction of the exhaust gas, since these catalyst units make no contribution by the exposure of K exhaust gas lines to a stoichiometric or rich exhaust gas bring to the lambda value reaction in the mixed exhaust gas. This saves sensors as well as identifying and replacing defective catalytic converter units based on the precise diagnosis.
  • a method is preferred in which exactly N-1 catalyst units are kept oxygen-free, and steps (a) and (b) are provided for determining the catalyst diagnostic value of the catalyst unit of the Nth exhaust line. This makes it possible to carry out an individual diagnosis of the catalyst unit of the Nth exhaust branch independently of the catalyst units of the other exhaust branches.
  • the catalyst units can expediently each have a pre-catalyst, a main catalyst or a combination of pre-catalyst and main catalyst. It goes without saying that in the case of a combination of pre-catalyst and main catalyst, an OSC and a catalyst diagnosis value of this combination are determined without further measures.
  • steps (a) and (b) are carried out successively for all exhaust gas lines.
  • a diagnosis of the entire catalyst system which does not differentiate between the individual catalyst units can also be carried out first, and an individual check of the individual catalyst units can only be carried out when damage to the overall system is detected. If the system is working properly, there is no need for individual testing.
  • the device according to the invention permits precise diagnosis of selected catalytic converter units with only one oxygen sensor arranged in the area of the common exhaust pipe.
  • FIG. 2 shows a flow chart of the diagnostic method according to the invention
  • Figure 3 shows the time course of a lambda signal downstream of one
  • FIG. 5 shows the time course of the lambda signal of probes arranged upstream or downstream of two catalysts when determining the oxygen storage capacity using the method according to the invention.
  • FIG. 1 shows an internal combustion engine 1 known per se with four cylinders.
  • the internal combustion engine 1 can preferably be directly injecting gasoline engine or a diesel engine.
  • Two cylinders are combined into a group and assigned to an exhaust line 5A or 5B.
  • the exhaust lines 5A or 5B are each equipped with a catalytic converter unit 2A or 2B.
  • Each catalytic converter unit 2A, 2B can be a pre-catalytic converter, a main catalytic converter or also a combination of pre-catalytic converter and main catalytic converter.
  • the catalytic converter unit 2A consists of a pre-catalytic converter V and a main catalytic converter H arranged downstream of it.
  • the catalytic converters can each be a three-way catalytic converter or a NOx storage catalytic converter.
  • sensors 3A and 3B are arranged in the exhaust lines 5A and 5B, respectively.
  • the exhaust lines 5A and 5B open into a common exhaust line 6 and together with this form the exhaust system of the internal combustion engine 1.
  • An exhaust gas combination unit 6A is arranged at the outlet point.
  • a sensor 4 for the mixed exhaust gas is arranged on the exhaust lines 2A and 2B in a region of the common exhaust gas line 6 downstream of the catalytic converter units 2A and 2B and the exhaust gas combination unit 6A.
  • the sensors 3A, 3B and 4 are designed as a broadband lambda probe, as a step response lambda probe or as a NOx sensor with a lambda value signal output.
  • the signals from the sensors 3A, 3B and 4 are recorded and evaluated by a control unit 7.
  • the control unit 7 forwards signals to a mixture control device 8.
  • the mixture control device 8 regulates or controls the fuel mixture that is supplied to the cylinders via actuating means 10, for example via a throttle valve 9.
  • the catalyst units of N-1 exhaust lines are kept in an oxygen-free state for a predetermined time interval T by exposure to a stoichiometric or rich exhaust gas;
  • a value of an oxygen storage capacity is determined in a region of the common exhaust line by applying a lambda value excitation of the exhaust gas to the catalyst units during the time interval T and evaluating an assigned lambda value reaction of the exhaust gas downstream of the exhaust gas merging and determines a catalyst diagnostic value depending on this value.
  • Steps (a) and (b) are carried out by the control and evaluation unit 7.
  • the method according to the invention can also be used in an exhaust gas system with more than two, generally with N exhaust gas lines.
  • the exhaust system can have further exhaust gas lines that are not included in the method according to the invention.
  • the common exhaust gas line 6 can supply exhaust gas to further catalytic converter units arranged downstream of the exhaust gas merging device 6A.
  • a group of K catalytic converter units can also be diagnosed together by applying the method to a group of K exhaust gas lines.
  • step S4 the oxygen storage capacity of the catalytic converter unit 2A and, depending on this, a catalytic converter diagnostic value for the catalytic converter unit 2A are determined in a manner known per se from the comparison of the lambda signals of the sensors 3A and 4.
  • step 4 the catalyst unit 2B is diagnosed in step S5 analogously to the diagnosis in step S.
  • FIG. 3 shows the course over time of lambda signals of a broadband lambda probe upstream and downstream of a catalyst unit according to a method known per se for determining the oxygen storage capacity.
  • the catalyst unit is acted upon by a lambda value excitation of the exhaust gas; in this case a wobble excitation with a given frequency and amplitude.
  • Figure 3 shows the course of an undamaged catalyst unit in which there is a sufficiently large oxygen storage capacity.
  • FIG. 4 the time profile of lambda signals in front of and behind a damaged catalytic converter unit with low oxygen storage capacity is shown in accordance with FIG.
  • the lambda signal of the probe arranged downstream of the catalyst unit follows the lambda signal of the probe arranged upstream of the catalyst device with a slight phase shift.
  • the catalytic converter unit 2B Since the catalytic converter unit 2B is kept oxygen-free, the fluctuations in the lambda signal are in the common exhaust pipe 6 arranged sensor 4 solely due to the fluctuations in the lambda value upstream of the catalytic converter unit 2A.
  • the lambda signals of the sensors 3A and 4 can essentially be used in a manner known per se.
  • the amplitude of the fluctuation of the lambda signal at the probe lying downstream of the catalytic converter units 2A and 2B is lower, since the exhaust gas mass flow in the common exhaust gas line 6 is greater than in the individual exhaust gas lines 5A and 5B. This reduction must be taken into account when evaluating the lambda signals and when specifying limit values, of which a catalytic converter unit is recognized as defective.
  • the catalyst units can also be diagnosed with a step response lambda probe, a NOx sensor with a lambda value signal output or a combination of such probes.
  • the method according to the invention is preferably used for the individual diagnosis of one or more catalytic converter units, which are each arranged in one of the N exhaust gas lines.
  • a collective diagnosis of groups of K catalytic converter units, which are arranged in a corresponding group of K exhaust gas lines, is also possible with the method according to the invention.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Abstract

L'invention concerne un procédé permettant de diagnostiquer des unités catalytiques d'un système catalytique d'un système d'échappement à N lignes d'échappement d'un moteur à combustion interne. Selon ledit procédé, (a) les unités catalytiques de N - K lignes d'échappement sont maintenues dans un état exempt d'oxygène pendant un intervalle de temps prédéfini T sous l'action d'un gaz d'échappement gras ou stoechiométrique ; (b) une valeur de capacité d'accumulation d'oxygène est déterminée pour les unités catalytiques des K autres lignes d'échappement par la mise en oeuvre d'une excitation de valeur Lambda des gaz d'échappement dans ces unités catalytiques pendant l'intervalle de temps T et par l'évaluation d'une réaction de valeur Lambda des gaz d'échappement correspondante en aval du collecteur d'échappement dans une zone de la conduite d'échappement commune puis une valeur de diagnostic catalytique est déterminée à partir de ladite valeur. De préférence, K=1. Ladite invention concerne également un dispositif permettant de diagnostiquer des unités catalytiques d'un système catalytique de ce type, lequel dispositif comprend un dispositif de commande et d'évaluation et déclenche les étapes (a) et (b). Le dispositif de correction du mélange (8) permet une régulation d'une valeur Lambda des gaz d'échappement dans les N lignes d'échappement.
PCT/EP2003/013520 2002-12-06 2003-12-01 Procede et dispositif pour le diagnostic d'unites catalytiques WO2004053307A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10257059.0 2002-12-06
DE10257059A DE10257059B4 (de) 2002-12-06 2002-12-06 Verfahren und Vorrichtung zur Diagnose von Katalysatoreinheiten

Publications (1)

Publication Number Publication Date
WO2004053307A1 true WO2004053307A1 (fr) 2004-06-24

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WO (1) WO2004053307A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1936140A1 (fr) * 2006-12-20 2008-06-25 Ford Global Technologies, LLC Procédé destiné à la surveillance d'un système de traitement postérieur des gaz d'échappement d'un moteur à combustion interne
EP2460991A1 (fr) * 2010-05-20 2012-06-06 Toyota Jidosha Kabushiki Kaisha Dispositif d'épuration des gaz d'échappement pour moteur à combustion interne
CN108071465A (zh) * 2016-11-14 2018-05-25 福特环球技术公司 具有第一催化剂和第二催化剂的排气通道

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005028001B4 (de) * 2005-06-17 2008-09-18 Audi Ag Verfahren und Vorrichtung zur Diagnose eines Katalysators im Abgasstrom einer Brennkraftmaschine
DE102008008985B4 (de) * 2008-02-13 2017-08-31 Volkswagen Ag Verfahren zur OSC-basierten Diagnose eines Katalysators
DE102010005469B4 (de) * 2010-01-23 2014-07-31 Entec Consulting Gmbh Verbrennungskraftmaschine
CN108884774B (zh) * 2016-03-29 2021-07-23 本田技研工业株式会社 催化剂诊断装置

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Publication number Priority date Publication date Assignee Title
US5207057A (en) * 1991-05-16 1993-05-04 Toyota Jidosha Kabushiki Kaisha Air-fuel ratio control device for an engine
EP0614004A1 (fr) * 1993-02-26 1994-09-07 Honda Giken Kogyo Kabushiki Kaisha Système pour commander le rapport air-carburant d'un moteur à combustion interne ayant plusieurs groupes de cylindres
EP1057989A2 (fr) * 1999-06-04 2000-12-06 Nissan Motor Company, Limited Système de commande de rapport air-carburant

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DE4127596A1 (de) * 1990-09-03 1992-03-05 Volkswagen Ag Einrichtung zur katalytischen reinigung der abgase einer brennkraftmaschine
US5417058A (en) * 1992-09-30 1995-05-23 Toyota Jidosha Kabushiki Kaisha Device for detecting deterioration of a catalytic converter for an engine
JP3380366B2 (ja) * 1995-05-22 2003-02-24 株式会社日立製作所 エンジン排気ガス浄化装置の診断装置
DE19626835A1 (de) * 1995-07-08 1997-01-09 Volkswagen Ag Dieselbrennkraftmaschine mit NOx-Speicher
DE10051675A1 (de) * 2000-10-18 2002-05-02 Porsche Ag Verfahren zum Betreiben einer Brennkraftmaschine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5207057A (en) * 1991-05-16 1993-05-04 Toyota Jidosha Kabushiki Kaisha Air-fuel ratio control device for an engine
EP0614004A1 (fr) * 1993-02-26 1994-09-07 Honda Giken Kogyo Kabushiki Kaisha Système pour commander le rapport air-carburant d'un moteur à combustion interne ayant plusieurs groupes de cylindres
EP1057989A2 (fr) * 1999-06-04 2000-12-06 Nissan Motor Company, Limited Système de commande de rapport air-carburant

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1936140A1 (fr) * 2006-12-20 2008-06-25 Ford Global Technologies, LLC Procédé destiné à la surveillance d'un système de traitement postérieur des gaz d'échappement d'un moteur à combustion interne
EP2460991A1 (fr) * 2010-05-20 2012-06-06 Toyota Jidosha Kabushiki Kaisha Dispositif d'épuration des gaz d'échappement pour moteur à combustion interne
EP2460991A4 (fr) * 2010-05-20 2014-11-05 Toyota Motor Co Ltd Dispositif d'épuration des gaz d'échappement pour moteur à combustion interne
CN108071465A (zh) * 2016-11-14 2018-05-25 福特环球技术公司 具有第一催化剂和第二催化剂的排气通道
CN108071465B (zh) * 2016-11-14 2022-04-26 福特环球技术公司 具有第一催化剂和第二催化剂的排气通道

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DE10257059B4 (de) 2013-05-23
DE10257059A1 (de) 2004-07-08

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