| Patents for F01N 11 - Monitoring or diagnostic devices for exhaust-gas treatment apparatus (7,022) |
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| 01/09/2001 | US6171565 Relates to the cycling of the normalized air/fuel ratio lambda-value of the exhaust gas exiting the engine |
| 01/02/2001 | US6167695 Method and system for diagnosing deterioration of NOx catalyst |
| 12/21/2000 | WO2000077372A1 METHOD FOR INITIATING AND MONITORING A DESULFURIZATION OF AT LEAST ONE NOx STORAGE-TYPE CATALYTIC CONVERTER ARRANGED IN AN EXHAUST CHANNEL OF AN INTERNAL COMBUSTION ENGINE |
| 12/21/2000 | WO2000077355A1 METHOD FOR DETECTING DETERIORATION OF AT LEAST ONE NOx STORAGE CATALYST ARRANGED IN THE EXHAUST LINE OF AN INTERNAL COMBUSTION ENGINE |
| 12/21/2000 | WO2000076636A1 CALIBRATION OF AN NOx SENSOR AND REGULATION OF AN UPSTREAM NOx STORAGE CATALYST |
| 12/21/2000 | DE19926305A1 Process for controlling operation of nitrogen oxides storage catalyst in exhaust gas tract of a lean-burn internal combustion engine comprises operating engine with a lean fuel/air mixtures to determine degree of effective storage |
| 12/20/2000 | EP1061241A1 Method for estimating the temperature of an exhaust gas treating catalytic exhaust muffler of an internal combustion engine |
| 12/19/2000 | US6161428 Method and apparatus for evaluating the conversion capability of a catalytic converter |
| 12/14/2000 | DE19926149A1 Verfahren zur Erfassung einer Schädigung von wenigsens einem in einem Abgaskanal einer Verbrennungskraftmaschine angeordneten NO¶x¶-Speicherkatalysator A method for detecting a damage of a wenigsens arranged in an exhaust passage of an internal combustion engine NO¶x¶ storage catalyst |
| 12/14/2000 | DE19926146A1 Verfahren zur Initiierung und Überwachung einer Entschwefelung von wenigstens einem in einem Abgaskanal einer Verbrennungskraftmaschine angeordneten NOx-Speicherkatalysator A method for initiating and monitoring a desulphurization of at least one of which is arranged in an exhaust passage of an internal combustion engine, the NOx storage catalyst |
| 12/14/2000 | DE19926139A1 Kalibrierung eines NOx-Sensors Calibration of a NOx sensor |
| 12/14/2000 | DE10001134A1 Exhaust gas purifier for an IC engine contains a nitrogen oxides absorber catalyst, an air-fuel ratio sensor, nitrogen oxides estimators, a judging device, an air-fuel ratio switching device and a deterioration judging device |
| 12/12/2000 | US6158212 Failure diagnosing device for exhaust gas purifying apparatus |
| 12/07/2000 | DE19951544C1 Operation of nitrogen oxides storage catalyst treating exhaust from lean burn engine, measures downstream exhaust gas oxygen concentration in strategy determining useful capacity to optimize rich regeneration extent |
| 12/05/2000 | US6155896 Exhaust system and control for watercraft |
| 11/30/2000 | WO2000071870A1 Method for controlling a rich/lean combustion mixture in a defined manner |
| 11/30/2000 | DE19922981A1 Verfahren zur Kontrolle der Funktionstüchtigkeit eines NO¶x¶-Speicherkatalysators Procedures for monitoring the health of a NO¶x¶ storage catalyst |
| 11/29/2000 | EP1055449A1 Process for monitoring the performance of an exhaust gas treatment system |
| 11/28/2000 | US6151889 Catalytic monitoring method |
| 11/28/2000 | US6151888 Method of diagnosing a catalytic converter |
| 11/23/2000 | DE10018333A1 Procedure for controlling operation of lean-mix IC engine has determination of characteristic values for incremental NOX amount generated during lean-mix operating state and stored in trap |
| 11/22/2000 | EP1054141A1 Exhaust-gas purification device for internal combustion engine |
| 11/22/2000 | EP1053777A1 Process for controlling the catalytic activity of an NOx-storage catalyst |
| 11/15/2000 | EP1052385A2 Method of diagnosing a catalyst having hydrocarbon oxidizing properties |
| 11/14/2000 | US6145305 System and method for diagnosing deterioration of NOx-occluded catalyst |
| 11/14/2000 | US6145304 Deterioration determination apparatus for exhaust emission control device of internal combustion engine |
| 11/14/2000 | US6145302 Method for monitoring a catalytic converter |
| 11/07/2000 | US6142012 Method of diagnosing a catalytic converter and arrangement therefor |
| 11/02/2000 | WO2000023694A3 Method for reducing nitrogen oxide in the exhaust gases of an internal combustion engine operated with a lean mixture |
| 11/02/2000 | EP1048830A2 Method and system for estimating a midbed temperature of a catalytic converter |
| 10/31/2000 | US6138453 Exhaust gas purification device for an internal combustion engine |
| 10/31/2000 | US6138452 Catalytic monitoring method |
| 10/24/2000 | US6134883 Method of controlling an engine exhaust gas system and method of detecting deterioration of catalyst/adsorbing means |
| 10/19/2000 | DE19913910A1 Gas-flow temperature determination procedure especially for motor vehicle internal combustion (IC) engine exhaust gas |
| 10/19/2000 | DE10005623A1 Measurement device and method for defining quantity of adsorbed combustion residue in adsorbent in exhaust gas includes sensors placed around engine and attached to electronic control unit |
| 10/18/2000 | EP1045119A1 Method and device for diagnosing the operational condition of an exhaust gas catalytic converter of an internal combustion engine |
| 10/17/2000 | US6131447 Process and arrangement for checking the operability of a secondary air pump in an internal-combustion engine |
| 10/17/2000 | US6131439 Catalyst deterioration detection with sensor calibration |
| 10/10/2000 | US6128898 Exhaust gas purifying apparatus for internal combustion engine |
| 10/05/2000 | DE19913901A1 Catalytic converter e.g. three-way type, functional capability verification procedure for fuel-injected internal combustion (IC) engine |
| 09/27/2000 | EP1039109A2 Exhaust emission control device of internal combustion engine |
| 09/21/2000 | DE19910336A1 Verfahren zur Überprüfung der Funktion von Katalysatoren in Brennkraftmaschinen Method for checking the function of catalysts in internal combustion engines |
| 09/19/2000 | US6120583 Exhaust gas purifier and operating method thereof |
| 09/19/2000 | US6120580 Method for testing systems designed for NOx reduction in the combustion of carbonaceous fuels |
| 09/19/2000 | US6119447 Arrangement and method for determining the oxygen buffer capacity in a catalytic converter |
| 09/14/2000 | WO2000053905A1 Method for monitoring the function of catalysts in internal combustion engines |
| 09/12/2000 | US6116021 Method for monitoring the performance of a catalytic converter using a rate modifier |
| 09/07/2000 | DE19848986C1 Gassensor zur Kohlenwasserstoffbestimmung mit Perovskitstruktur Gas sensor for hydrocarbon determination with perovskite structure |
| 09/05/2000 | US6112518 System and method for monitoring a catalytic converter |
| 08/24/2000 | DE19907382A1 Engine catalyser temperture estimation method uses temperature model for calculating catalyst temperature in dependence on measured or calculated exhaust gas temperature |
| 08/24/2000 | DE19851564C2 Verfahren zum Betreiben und Überprüfen eines NOx-Speicherreduktionskatalysators einer Mager-Brennkraftmaschine Method for operating and checking a NOx storage reduction catalyst, a lean burn engine |
| 08/23/2000 | EP1029164A1 A method of monitoring efficiency of a catalytic converter and a control system suitable for use in the method |
| 08/23/2000 | EP0909364A4 Method for monitoring the performance of a catalytic converter using post catalyst methane measurements |
| 08/22/2000 | US6105366 Method for monitoring the emission control system of a spark ignition internal combustion engine |
| 08/15/2000 | US6103080 Hydrocarbon sensors and materials therefor |
| 08/10/2000 | DE19901066C1 Verfahren zur Erkennung von durchlaßverringernden Veränderungen in einem Abgaskatalysatorkörper A method for the detection of changes in an exhaust gas durchlaßverringernden catalyst body |
| 08/03/2000 | DE19913268C1 Arrangement for monitoring the efficiency of a catalytic emission reduction device comprises a fuel feed device, flow and temperature sensors and data processing sensors |
| 07/26/2000 | CN1261423A Method for monitoring the conversion rate f an exhaust gas catalytic converter for an internal combustion engine |
| 07/25/2000 | US6092369 Catalyst deterioration-determining system for internal combustion engines using compressed natural gas |
| 07/25/2000 | US6092368 Function diagnostic system for an exhaust gas purifying apparatus in an internal combustion engine |
| 07/19/2000 | EP0793770B1 Device for monitoring the operatability of catalytic converters |
| 07/18/2000 | US6092019 Method of judging monitoring condition for diagnosis of engine |
| 07/18/2000 | US6089016 Diagnostic equipment for an exhaust gas cleaning apparatus |
| 07/11/2000 | US6085518 Air-fuel ratio feedback control for engines |
| 07/06/2000 | DE19963277A1 Arrangement for detecting internal combustion engine catalyser degradation determines degradation from estimated stored oxygen quantity, air-fuel mixture ratio after engine re-start |
| 07/04/2000 | US6082101 Exhaust gas purifier for engines |
| 06/29/2000 | DE19962675A1 Diagnostic equipment and method for adsorption medium used to absorb harmful gas emissions from IC engines monitors oxygen content of gases released by medium |
| 06/27/2000 | US6079251 Diesel exhaust analysis system and method of using the same |
| 06/27/2000 | US6079203 Apparatus and method for detecting deterioration of NOx catalyst in diesel engine |
| 06/21/2000 | CN1257435A Reducing NOx emissions from an engine by temperature-controlled urea injection |
| 06/13/2000 | US6073440 System for detecting deterioration of catalyst for purifying exhaust gas |
| 05/25/2000 | WO2000029729A1 METHOD FOR MONITORING NOx STORAGE CATALYTIC CONVERTERS AND EXHAUST-GAS PURIFICATION DEVICE FOR CARRYING OUT SAID METHOD |
| 05/18/2000 | DE19852240A1 Überwachungsverfahren für NOx-Speicherkatalysatoren und Abgasreinigungsvorrichtung zur Durchführung dieses Verfahrens Monitoring method for NOx storage catalysts, and exhaust gas purifying apparatus for performing this method |
| 05/16/2000 | US6063350 Monitoring the quality, tempearture and level of urea solution, generating sensor signals, comparing with reference values, generating control signals, thus controlling flow of urea, passing exhasut gas throgh selective catalytic reactor |
| 05/11/2000 | DE19851564A1 Process for conducting and testing the activity of a nitrogen oxides storage catalyst comprises comparing the ageing factor of the catalyst with a number of threshold values of different levels |
| 05/10/2000 | EP0999352A2 Method and apparatus for controlling and monitoring the ageing of a catalytic converter in the exhaust gas of internal combustion engines and of the harmful emissions |
| 05/04/2000 | WO2000025119A1 Gas sensor with a perovskite structure for determining hydrocarbon |
| 05/04/2000 | DE19850338A1 Verfahren und Einrichtung zur Kontrolle und Beobachtung der Alterung eines Katalysators im Abgas von Verbrennungskraftmaschinen und des Schadstoffausstoßes Method and apparatus for monitoring and control of the aging of a catalyst in the exhaust of internal combustion engines and gas emissions |
| 05/03/2000 | CN1252120A Method and device for monitoring NOx accumulator |
| 04/27/2000 | WO2000023694A2 Method for reducing nitrogen oxide in the exhaust gases of an internal combustion engine operated with a lean mixture |
| 04/20/2000 | WO2000021881A1 REDUCING NOx EMISSIONS FROM AN ENGINE BY TEMPERATURE-CONTROLLED UREA INJECTION FOR SELECTIVE CATALYTIC REDUCTION |
| 04/20/2000 | DE19847874A1 Use of on-board diagnosis apparatus for monitoring nitrogen oxide absorption catalyst regeneration, includes examination of reliability-critical components on detection of anomalies |
| 04/18/2000 | US6050128 Catalyst deterioration monitoring |
| 04/18/2000 | US6050087 Method and apparatus for diagnosing engine exhaust gas purification system |
| 04/12/2000 | EP0992664A1 Device for monitoring the functioning of lambda sensors |
| 04/12/2000 | EP0991853A1 Method for monitoring the conversion rate of an exhaust gas catalytic converter for an internal combustion engine |
| 04/12/2000 | EP0991852A2 Method and apparatus for injecting hydrogen into a catalytic converter |
| 04/11/2000 | US6047544 Engine exhaust gas purification catalyst and exhaust gas purifier |
| 03/30/2000 | DE19844178A1 Testing functionality of catalyst, e.g. nitrogen oxide storage catalyst, comprises carrying out regeneration test to remove reversible functionality losses, and testing and assessing functionality |
| 03/30/2000 | DE19843859A1 Improvement in exhaust gas composition, following degradation due to sulfur content, is brought about by rich regeneration when either oxygen storage capacity or total sulfur input falls outside set threshold. |
| 03/30/2000 | DE19842426A1 Determination of rich regeneration interval of nitrogen oxide storage catalyst in lean burn engine system comprises monitoring temperature of solid catalyst |
| 03/28/2000 | US6041592 Control system and method for an NOx accumulator |
| 03/22/2000 | EP0804679B1 Catalyst |
| 03/14/2000 | US6037183 For accurately measuring the non-methane hydrocarbon concentration of exhaust gas; having two catalytic differential calorimetric sensors and a means for comparing the output signals |
| 03/14/2000 | US6035632 Step response catalyst monitoring |
| 03/09/2000 | DE19836955A1 Verfahren zum Erkennen und Aufrechterhalten der Betriebsbereitschaft eines NO¶x¶-Speicherkatalysators A method for detecting and maintaining the operational readiness of a NO¶x¶ storage catalyst |
| 02/24/2000 | WO2000009870A1 METHOD FOR RECOGNIZING AND MAINTAINING THE OPERATIONAL CAPABILITY OF A NOx STORAGE CATALYTIC CONVERTER |
| 02/23/2000 | EP0980967A2 Catalyst deterioration detector and method of detecting deterioration of catalyst |
| 02/22/2000 | US6026640 Method of controlling an engine exhaust gas system and method of detecting deterioration of catalyst/adsorbing means |
| 02/22/2000 | US6026639 Apparatus and method for diagnosis of catalyst performance |