Patents by Inventor Bernd Christner
Bernd Christner has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9737853Abstract: A determination of a quality of a reducing agent solution containing ammonia used to reduce nitrogen oxides involves actuating a metering unit that delivers metered quantities of reducing agent solution into an engine's discharged exhaust gas and determining an efficiency value that is at least correlated with the efficiency of the SCR catalytic converter and comparing the efficiency value to a predefinable limit value. If an efficiency value not corresponding to proper functioning of the SCR exhaust emission control system is identified by the comparison, a switch is made to a diagnostic mode in a second method step. If a predefinable deviation of the efficiency value from a limit value is identified after expiration of the second method step time period, a third method step is performed for conditioning the SCR catalytic converter. A fourth step involves an adaptation mode in which a deviation from the efficiency value is determined.Type: GrantFiled: June 29, 2012Date of Patent: August 22, 2017Assignee: Daimler AGInventors: Bernd Christner, Uwe Hofmann, Tobias Peters
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Patent number: 9353664Abstract: In a system with an SCR catalytic converter, a correction by a changeable long term adaption factor to a target dosing rate is provided for the model dosing rate and a correction by a changeable short term adaption factor to an assumed actual filling state for the ammonia filling level value. A dosing unit controllable by a control unit adds an ammonia-containing reducing agent to the exhaust gas and an exhaust gas enriched with ammonia according to the dosing is fed to the SCR catalytic converter. An ammonia filling level value for a filling level of ammonia stored in the SCR catalytic converter and a model dosing rate for dosing the reducing agent into the exhaust gas are calculated by a computer model.Type: GrantFiled: July 22, 2009Date of Patent: May 31, 2016Assignee: Daimler AGInventors: Bernd Christner, Uwe Hofmann, Alexander Kaiser, Markus Paule
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Patent number: 8978362Abstract: A method for operating an exhaust gas treatment system that includes an SCR catalytic converter is provided. Either a model-based filling level regulation for achieving the target filling level or a model-based efficiency control for achieving the target efficiency is performed according to presettable values for certain operating variables such as a temperature of the exhaust gas or of the SCR catalytic converter.Type: GrantFiled: July 22, 2009Date of Patent: March 17, 2015Assignee: Daimler AGInventors: Bernd Christner, Markus Paule
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Publication number: 20140199219Abstract: A determination of a quality of a reducing agent solution containing ammonia used to reduce nitrogen oxides involves actuating a metering unit that delivers metered quantities of reducing agent solution into an engine's discharged exhaust gas and determining an efficiency value that is at least correlated with the efficiency of the SCR catalytic converter and comparing the efficiency value to a predefinable limit value. If an efficiency value not corresponding to proper functioning of the SCR exhaust emission control system is identified by the comparison, a switch is made to a diagnostic mode in a second method step. If a predefinable deviation of the efficiency value from a limit value is identified after expiration of the second method step time period, a third method step is performed for conditioning the SCR catalytic converter. A fourth step involves an adaptation mode in which a deviation from the efficiency value is determined.Type: ApplicationFiled: June 29, 2012Publication date: July 17, 2014Applicant: Daimler AGInventors: Bernd Christner, Uwe Hofmann, Tobias Peters
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Patent number: 8763366Abstract: In a method for operating an air-compressing fuel-injection internal combustion engine having an exhaust gas post-treatment system with a particle filter and a nitrogen oxide reduction catalytic converter, a plurality of internal combustion engine operating settings are provided, each having respective predefined values for predefined internal combustion engine operating parameters. A heating operating setting is set when the internal combustion engine is warming up, while a basic operating setting is set in the warmed-up state. When the temperature in the exhaust gas system exceeds a predefinable first value, the heating operating setting is changed over to the basic operating setting. In the warmed-up state, at least one further (third) operating setting, with an exhaust gas recirculation rate that is reduced compared to the basic operating setting, is provided in addition to the basic operating setting.Type: GrantFiled: March 14, 2013Date of Patent: July 1, 2014Assignee: Daimler AGInventors: Bernd Christner, Alexander Kaiser, Berthold Keppeler, Holger Kissling, Markus Paule
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Patent number: 8429897Abstract: In a method for operating an air-compressing fuel-injection internal combustion engine having an exhaust gas post-treatment system with a particle filter and a nitrogen oxide reduction catalytic converter, a plurality of internal combustion engine operating settings are provided, each having respective predefined values for predefined internal combustion engine operating parameters. A heating operating setting is set when the internal combustion engine is warming up, while a basic operating setting is set in the warmed-up state. When the temperature in the exhaust gas system exceeds a predefinable first value, the heating operating setting is changed over to the basic operating setting. In the warmed-up state, at least one further (third) operating setting, with an exhaust gas recirculation rate that is reduced compared to the basic operating setting, is provided in addition to the basic operating setting.Type: GrantFiled: November 30, 2011Date of Patent: April 30, 2013Assignee: Daimler AGInventors: Bernd Christner, Alexander Kaiser, Berthold Keppeler, Holger Kissling, Markus Paule
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Publication number: 20120067029Abstract: In a method for operating an air-compressing fuel-injection internal combustion engine having an exhaust gas post-treatment system with a particle filter and a nitrogen oxide reduction catalytic converter, a plurality of internal combustion engine operating settings are provided, each having respective predefined values for predefined internal combustion engine operating parameters. A heating operating setting is set when the internal combustion engine is warming up, while a basic operating setting is set in the warmed-up state. When the temperature in the exhaust gas system exceeds a predefinable first value, the heating operating setting is changed over to the basic operating setting. In the warmed-up state, at least one further (third) operating setting, with an exhaust gas recirculation rate that is reduced compared to the basic operating setting, is provided in addition to the basic operating setting.Type: ApplicationFiled: November 30, 2011Publication date: March 22, 2012Applicant: Daimler AGInventors: Bernd CHRISTNER, Alexander Kaiser, Berthold Keppeler, Holger Kissling, Markus Paule
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Patent number: 8091339Abstract: In a method for operating an air-compressing fuel-injection internal combustion engine having an exhaust gas post-treatment system with a particle filter and a nitrogen oxide reduction catalytic converter, a plurality of internal combustion engine operating settings are provided, each having respective predefined values for predefined internal combustion engine operating parameters. A heating operating setting is set when the internal combustion engine is warming up, while a basic operating setting is set in the warmed-up state. When the temperature in the exhaust gas system exceeds a predefinable first value, the heating operating setting is changed over to the basic operating setting. In the warmed-up state, at least one further, (third) operating setting, with an exhaust gas recirculation rate that is reduced compared to the basic operating setting, is provided in addition to the basic operating setting.Type: GrantFiled: August 31, 2006Date of Patent: January 10, 2012Assignee: Daimler AGInventors: Bernd Christner, Alexander Kaiser, Berthold Keppeler, Holger Kissling, Markus Paule
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Patent number: 8061122Abstract: In a device and a method for removing nitrogen oxides from the exhaust of an internal combustion engine which is operated predominantly with an excess of air, the internal combustion engine is assigned an exhaust system having a nitrogen oxide reduction catalytic converter which comprises two catalytic converter parts, whose reducing agent filling levels can be determined. Metering of a reducing-agent-containing additive into the exhaust gas of the internal combustion engine takes place as a function of the reducing agent filling level of the first catalytic converter part and/or of the second catalytic converter part.Type: GrantFiled: March 14, 2006Date of Patent: November 22, 2011Assignee: Daimler AGInventors: Marc Chaineux, Bernd Christner, Nicholas Fekete, Berthold Keppeler, Markus Paule
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Publication number: 20110113752Abstract: In a system with an SCR catalytic converter, a correction by a changeable long term adaption factor to a target dosing rate is provided for the model dosing rate and a correction by a changeable short term adaption factor to an assumed actual filling state for the ammonia filling level value. A dosing unit controllable by a control unit adds an ammonia-containing reducing agent to the exhaust gas and n exhaust gas enriched with ammonia according to the dosing is fed to the SCR catalytic converter. An ammonia filling level value for a filling level of ammonia stored in the SCR catalytic converter and a model dosing rate for dosing the reducing agent into the exhaust gas are calculated by a computer model.Type: ApplicationFiled: July 22, 2009Publication date: May 19, 2011Applicant: Daimler AGInventors: Bernd Christner, Uwe Hofmann, Alexander Kaiser, Markus Paule
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Publication number: 20110113753Abstract: A method for operating an exhaust gas treatment system that includes an SCR catalytic converter is provided. Either a model-based filling level regulation for achieving the target filling level or a model-based efficiency control for achieving the target efficiency is performed according to presettable values for certain operating variables such as a temperature of the exhaust gas or of the SCR catalytic converter.Type: ApplicationFiled: July 22, 2009Publication date: May 19, 2011Applicant: Daimler AGInventors: Bernd Christner, Markus Paule
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Publication number: 20080314028Abstract: In a method for operating an air-compressing fuel-injection internal combustion engine having an exhaust gas post-treatment system with a particle filter and a nitrogen oxide reduction catalytic converter, a plurality of internal combustion engine operating settings are provided, each having respective predefined values for predefined internal combustion engine operating parameters. A heating operating setting is set when the internal combustion engine is warming up, while a basic operating setting is set in the warmed-up, while a basic operating setting is set in the warmed-up state. When the temperature in the exhaust gas system exceeds a predefinable first value, the heating operating setting is changed over to the basic operating setting. In the warmed-up state, at least one further, (third) operating setting, with an exhaust gas recirculation rate that is reduced compared to the basic operating setting, is provided in addition to the basic operating setting.Type: ApplicationFiled: August 31, 2006Publication date: December 25, 2008Applicant: Daimler AGInventors: Bernd Christner, Alexander Kaiser, Berthold Keppeler, Holger Kissling, Markus Paule
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Publication number: 20080216463Abstract: In a device and a method for removing nitrogen oxides from the exhaust of an internal combustion engine which is operated predominantly with an excess of air, the internal combustion engine is assigned an exhaust system having a nitrogen oxide reduction catalytic converter which comprises two catalytic converter parts, whose reducing agent filling levels can be determined. Metering of a reducing-agent-containing additive into the exhaust gas of the internal combustion engine takes place as a function of the reducing agent filling level of the first catalytic converter part and/or of the second catalytic converter part.Type: ApplicationFiled: March 14, 2006Publication date: September 11, 2008Applicant: DaimlerChrysler AGInventors: Marc Chaineux, Bernd Christner, Nicholas Fekete, Berthold Keppeler, Markus Paule
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Publication number: 20070209636Abstract: In a method for operating an internal combustion engine, in particular an auto-ignition internal combustion engine, having at least one combustion chamber in which an air/fuel mixture is formed, and recirculated exhaust gas is admixed to the combustion air, a base setting of the exhaust gas recirculation rate is established as a function of a first characteristic operating variable, the exhaust gas recirculation rate is adjusted depending on at least one of the first and a second characteristic operating variable, and, in order to optimize combustion, the exhaust gas recirculation rate is adjusted a second time on the basis of a combustion noise measurement.Type: ApplicationFiled: January 29, 2007Publication date: September 13, 2007Inventors: Markus Ammann, Bernd Christner, Nicholas Fekete, Matthias Klingebiel, Ruediger Pfaff
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Internal combustion engine comprising a reducing agent production unit and operating method therefor
Publication number: 20060101809Abstract: An internal combustion engine with a reducing agent-generating unit for generation of an H2-containing and/or NH3-containing reducing gas, which can be added to an exhaust gas line upstream from an NOx reducing catalytic converter, and a procedure for the operation of such an internal combustion engine are proposed. The reducing agent-generating unit has an NOx generation step and an H2 generation step in serial arrangement. NH3 is formed at least temporarily by chemical reaction by the reducing agent-generating unit from NOx produced in the NOx generation step. The invention is applicable in motor vehicles, especially in passenger vehicles with Diesel engines.Type: ApplicationFiled: July 30, 2003Publication date: May 18, 2006Inventors: Thilo-Ralf Bodo, Bernd Christner, Frank Duvinage, Christian Goerigk, Harald Menke, Sigfried Mueller-Lunz, Arno Nolte, Markus Paule -
Patent number: 6873901Abstract: A method for operating an electronic controller of a motor vehicle, in particular of an engine controller, with which signal processing is carried out in order to control the operation of the motor vehicle and/or of the engine. The signal processing of the controller includes a filtering operation, the filtering operation being carried out as a function of the operating state of the motor vehicle and/or of the engine.Type: GrantFiled: December 2, 2002Date of Patent: March 29, 2005Assignee: DaimlerChrysler AGInventors: Bernd Christner, Frank Duvinage, Arno Nolte, Markus Paule, Henning Sander
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Publication number: 20030196647Abstract: A method for operating an electronic controller of a motor vehicle, in particular of an engine controller, with which signal processing is carried out in order to control the operation of the motor vehicle and/or of the engine. The signal processing of the controller includes a filtering operation, the filtering operation being carried out as a function of the operating state of the motor vehicle and/or of the engine.Type: ApplicationFiled: December 2, 2002Publication date: October 23, 2003Inventors: Bernd Christner, Frank Duvinage, Arno Nolte, Markus Paule, Henning Sander