Abstract: A method of and apparatus for controlling the reducing agent in an exhaust gas aftertreatment system of an internal combustion engine with an exhaust gas duct in which an SCR catalyst is provided in the direction of flow of the exhaust gas. A reducing agent-generating system (RGS) comprising an NOx and CO/H2 production unit as well as a combined NOx storage/ammonia production unit in the standard gas path of the reducing agent-generating system. Ammonia is delivered upstream from the SCR catalyst to reduce nitrogen oxides, starting materials for producing the ammonia being fed at least in part to the NOx and CO/H2 production unit via a fuel inlet and an air inlet. An AGC matrix of the combined NOx storage/ammonia production unit is cooled at least intermittently by means of an inner and/or outer cooling device.

Abstract: Devices and methods for the production of ammonia as a reducing agent for the selective catalytic reduction (SCR) of nitrogen oxides in the exhaust gas of a combustion source, especially of an internal combustion engine. The ammonia is admixed with the exhaust gas in the direction of flow in front of a SCR-catalytic converter. In so doing, nitrogen oxide is produced in a nitrogen oxide production unit separated from the combustion source and its exhaust gas duct and is stored in at least one storage catalytic converter or a nitrogen oxide storage and a subsequently connected catalytic converter. Furthermore, hydrogen and/or a hydrogen-carbon monoxide-mixture is produced in a hydrogen production unit separated from the combustion source and its exhaust gas duct and delivered to a storage catalytic converter. Hydrogen and the stored nitrogen oxide are converted catalytically to ammonia in the storage catalytic converter or in the catalytic converter.

Abstract: A method for influencing exhaust-gas characteristics of a motor vehicle having a combustion engine in which the exhaust-gas composition and/or the exhaust-gas temperature are/is influenced with the aid of an emission management system that includes a control device having an emission management algorithm and at least one control element. The exhaust-gas values are able to be optimized, and the fuel consumption lowered if the generator output is increased or lowered by the emission management system within the framework of an emission management measure.

Abstract: The invention relates to a procedure for controlling the reducing agent in an exhaust gas post-processing system of a combustion machine with an exhaust gas duct, in which an SCR catalytic converter is provided in the direction of flow of the exhaust, wherein a reducing agent generation system has an NOx and CO/H2 generation unit,, an oxidation catalytic converter and a combined NOx storage / ammonia generation unit in the standard gas route of the reducing agent generation system, and, in order to reduce nitrogen oxide, ammonia is added as a reducing agent in front of the SCR catalytic converter by the reducing agent generation system, wherein source materials for the generation of ammonia are at least intermittently added to the NOx and CO/H2 generation unit via a fuel supply line and via an air supply line, wherein during the fat phase the air/fuel composition is changed in front of the oxidation catalytic converter in the form of a lambda modulation for a lambda value.

Abstract: A method of and apparatus for controlling the reducing agent in an exhaust gas aftertreatment system of an internal combustion engine with an exhaust gas duct in which an SCR catalyst is provided in the direction of flow of the exhaust gas. A reducing agent-generating system (RGS) comprising an NOx and CO/H2 production unit as well as a combined NOx storage/ammonia production unit in the standard gas path of the reducing agent-generating system. Ammonia is delivered upstream from the SCR catalyst to reduce nitrogen oxides, starting materials for producing the ammonia being fed at least in part to the NOx and CO/H2 production unit via a fuel inlet and an air inlet. An AGC matrix of the combined NOx storage/ammonia production unit is cooled at least intermittently by means of an inner and/or outer cooling device.

Abstract: A sensor for detecting particles in a gas flow, in particular soot particles in an exhaust gas flow, includes at least two measuring electrodes, which are positioned on a substrate made of an insulating material. To protect the measuring electrodes, they are covered by a protective layer.

Abstract: A method for metering ammonia into the exhaust-gas region of an internal combustion engine and a device for implementing the method. The ammonia storage capacity of an SCR catalytic converter situated in the exhaust-gas region of the internal combustion engine is utilized. After the internal combustion engine has been switched off, ammonia is introduced into the exhaust-gas region in front of the SCR catalytic converter. Thus, following a renewed start-up of the internal combustion engine, the ammonia required in the SCR catalytic converter for reducing the nitrogen oxides contained in the exhaust gas of the internal combustion engine are already available before an ammonia source is ready for operation. The procedure eliminates the need for a pressure storage of ammonia in the switched-off state of the internal combustion engine.

Abstract: The invention concerns a device to produce ammonia as a reducing agent for the selective catalytic reduction (SCR) of nitrogen oxides in the exhaust gas of a combustion source, especially of an internal combustion engine, whereby the ammonia is admixed with the exhaust gas in the direction of flow in front of a SCR-catalytic converter. In so doing, provision is made for a nitrogen oxide production unit separated from the combustion source and its exhaust gas duct and a hydrogen production unit separated from the combustion source and its exhaust gas duct; and nitrogen oxide of the nitrogen oxide production unit and the hydrogen of the hydrogen production unit are delivered at least to a storage catalytic converter or a nitrogen oxide storage and a subsequently connected catalytic converter for the storage of the nitrogen oxide and for the formation of ammonia.

Abstract: The invention relates to a procedure for controlling the reducing agent in an exhaust gas post-processing system of a combustion machine with an exhaust gas duct, in which an SCR catalytic converter is provided in the direction of flow of the exhaust, wherein a reducing agent generation system has an NOx and CO/H2 generation unit,, an oxidation catalytic converter and a combined NOx storage / ammonia generation unit in the standard gas route of the reducing agent generation system, and, in order to reduce nitrogen oxide, ammonia is added as a reducing agent in front of the SCR catalytic converter by the reducing agent generation system, wherein source materials for the generation of ammonia are at least intermittently added to the NOx and CO/H2 generation unit via a fuel supply line and via an air supply line, wherein during the fat phase the air/fuel composition is changed in front of the oxidation catalytic converter in the form of a lambda modulation for a lambda value.

Abstract: The invention concerns a device for the production of ammonia for the selective catalytic reduction of nitrogen oxides in the exhaust of an internal combustion engine with an air supply. If the air supply includes a power supply, which is independent of the power of the internal combustion engine, and which powers a compression stage for air supply, the result would be an efficient production of reduction agents even under varying operating conditions of the internal combustion engine and the addition of the reduction agent in proper amounts to the exhaust to be cleaned.

Abstract: A device for ascertaining a particle concentration in an exhaust gas flow of a combustion device, particularly a diesel combustion device, is provided, which device ascertains very small particle concentrations in the exhaust gas of combustion devices, accompanied by high time resolution. At least one measuring unit is provided for measuring a concentration of an oxidizing agent in the exhaust gas flow, having at least one measuring element sensitive to the oxidizing agent.

Abstract: An exhaust treatment apparatus having a body through which the exhaust of an internal combustion engine can flow, which body has regions with different flow resistances; the body has flow regions that are separate from one another and are each delimited by a delimiting device and each have at least one inflow opening that the exhaust can act on; the different flow resistances in the regions are produced by differently embodied delimiting devices.

Abstract: A device for determining the state, in particular the permeability, of a particle filter has an acoustic source for transmitting an acoustic signal toward the particle filter and has an acoustic receiver for receiving the acoustic signal that has been changed by the particle filter. In addition, a control and evaluation unit is provided for controlling the acoustic source and evaluating the received acoustic signal.

Abstract: The present invention relates to an for apparatus and a method of cleaning exhaust gas from an internal combustion engine, in particular a Diesel engine. The apparatus has an exhaust gas line and an ozone source for enriching the exhaust gas stream of the engine with ozone. The ozone source generates a continuous ozone-containing gas stream, in such a way that particles flowing in the exhaust gas line are to a large extent oxidized, as a result of which the exhaust gas line can be kept free of particle filters.

Abstract: A method for metering ammonia into the exhaust-gas region of an internal combustion engine and a device for implementing the method. The ammonia storage capacity of an SCR catalytic converter situated in the exhaust-gas region of the internal combustion engine is utilized. After the internal combustion engine has been switched off, ammonia is introduced into the exhaust-gas region in front of the SCR catalytic converter. Thus, following a renewed start-up of the internal combustion engine, the ammonia required in the SCR catalytic converter for reducing the nitrogen oxides contained in the exhaust gas of the internal combustion engine are already available before an ammonia source is ready for operation. The procedure eliminates the need for a pressure storage of ammonia in the switched-off state of the internal combustion engine.

Abstract: A combustion system is for generating energy by the combustion of a fuel, using a combustion device, such as, for example, a gasoline or diesel engine. An emission control system is provided for converting exhaust gas components using an automotive fluid, by the use of which energy, that is relatively environmentally protective and made available for varied applications. At least one hydrogen generating unit is provided for converting the automotive fluid at least partially into an hydrogen-containing fuel.

Abstract: A sensor (1) for ascertaining a carbon monoxide concentration of a gas mixture (2), having a proton-conducting electrolyte (4) disposed between at least two electrochemically active electrodes (5, 6), in particular catalytically active electrodes (5, 6), of which at least one electrode is CO-sensitive, and in which a measurement unit (8) for measuring at least a first, electrical operating parameter of the sensor (1) at at least one electrode (5, 6) of the sensor (1) is provided, is proposed, with which calibration intervals are markedly lengthened and cross-sensitivities are minimized. This is attained according to the invention in that an evaluation unit (8) is provided for evaluating a change over time in the first, electrical operating parameter of the sensor (1) as a function of a known change over time of at least one second operating parameter.

Abstract: A method and a device for use in the aftertreatment of exhaust gas of an internal combustion engine, in particular of a diesel engine, are described, having a device for providing oxidizing agents and an exhaust-gas aftertreatment unit, a temperature sensor (40) being provided to measure the temperature of the exhaust gas before it enters the exhaust-gas aftertreatment unit (10) and the device (20) for providing oxidizing agents being set up to vary the chemical composition of the oxidizing agents as a function of the temperature. This method of exhaust-gas aftertreatment ensures energy-efficient preparation of the exhaust gas.

Abstract: A combustion system is for generating energy by the combustion of a fuel, using a combustion device, such as, for example, a gasoline or diesel engine. An emission control system is provided for converting exhaust gas components using an automotive fluid, by the use of which energy, that is relatively environmentally protective and made available for varied applications. At least one hydrogen generating unit is provided for converting the automotive fluid at least partially into an hydrogen-containing fuel.

Abstract: A fuel cell system has a reformer unit (1) for generating a reformate which is provided as a fuel for a fuel cell unit (4). The fuel cell system includes a sensor (5, 6, 7) for monitoring the quality of the reformate and a valve (9, 10) which can be controlled in dependence upon the sensor. Compared to conventional systems, the valve can react very rapidly to disturbances in the preparation of the reformate and can especially prevent that disturbances lead to damage of the fuel cell unit (4) and the electrical output power of the fuel cell unit continues to be controllable. This is achieved in that at least one storage unit (11) is provided for feeding fuel to the fuel cell unit (4) in dependence upon the quality of the reformate.