Abstract: An exhaust gas system includes a reducing agent preparation section having a first cylindrical exhaust gas line pipe section opening approximately perpendicularly into a second exhaust gas line pipe section via an opening in a cylinder lateral surface of the second exhaust gas line pipe section. An injector unit for introducing the reducing agent into the exhaust gas is situated at the first exhaust gas line pipe section, upstream from the opening. The opening in the cylinder lateral surface of the second exhaust gas line pipe section has a larger extension in the direction of the longitudinal extent of the second exhaust gas line pipe section than transversely thereto. In a method using the reducing agent preparation section a rotating exhaust gas flow is formed within the second exhaust gas line pipe section.

Abstract: An exhaust gas system includes a reducing agent preparation section having a first cylindrical exhaust gas line pipe section opening approximately perpendicularly into a second exhaust gas line pipe section via an opening in a cylinder lateral surface of the second exhaust gas line pipe section. An injector unit for introducing the reducing agent into the exhaust gas is situated at the first exhaust gas line pipe section, upstream from the opening. The opening in the cylinder lateral surface of the second exhaust gas line pipe section has a larger extension in the direction of the longitudinal extent of the second exhaust gas line pipe section than transversely thereto. In a method using the reducing agent preparation section a rotating exhaust gas flow is formed within the second exhaust gas line pipe section.

Abstract: The exhaust gas aftertreatment device according to the invention having a reforming unit for generating hydrogen by steam reforming, partial oxidation of hydrocarbons and/or mixed forms thereof is distinguished by the fact that the reforming unit is arranged directly in the main exhaust gas stream from an internal combustion engine. The steam and residual oxygen which are required for the reforming preferably originate from the exhaust gas. The step of providing the required reducing agents consists in briefly switching the internal combustion engine, which is predominantly operated in lean-burn mode and the exhaust gas from which is undergoing the aftertreatment, to rich-burn mode, allowing reforming by means of the reforming reactor according to the invention using the hydrocarbons that are present in the exhaust gas.

Abstract: An exhaust gas purification system for a motor vehicle having a reducing agent storage tank, and an associated operating method. In particular, an exhaust gas purification system for a motor vehicle, for which predetermined maintenance intervals is provided. The system includes a reducing agent storage tank for storing a reducing agent intended for exhaust gas purification. A method for operating a motor vehicle having an exhaust gas purification system and a reducing agent storage tank for storing a reducing agent intended for the exhaust gas purification, which comprises predetermined maintenance work after predetermined maintenance intervals is also provided.

Abstract: An exhaust-gas purification unit for purifying the exhaust gas from an internal combustion engine which is preferably operated in lean-burn mode, in particular a diesel engine used in motor vehicles, has a particulate filter and a SCR catalytic converter arranged in the exhaust pipe in succession in the direction of flow, and a reducing-agent supply. Ammonia can be added to the exhaust gas from the internal combustion engine on the entry side of the SCR catalytic converter by the reducing-agent supply. The exhaust-gas purification unit includes a hydrogen-generating unit for enriching the exhaust gas from the internal combustion engine with the hydrogen which it generates.

Abstract: An exhaust-gas purification unit for purifying the exhaust gas from an internal combustion engine which is preferably operated in lean-burn mode, in particular a diesel engine used in motor vehicles, has a particulate filter and a SCR catalytic converter arranged in the exhaust pipe in succession in the direction of flow, and a reducing-agent supply. Ammonia can be added to the exhaust gas from the internal combustion engine on the entry side of the SCR catalytic converter by the reducing-agent supply. The exhaust-gas purification unit includes a hydrogen-generating unit for enriching the exhaust gas from the internal combustion engine with the hydrogen which it generates.

Abstract: The invention proposes an exhaust-gas purification unit for purifying the exhaust gas from an internal combustion engine which is preferably operated in lean-burn mode, in particular a diesel engine used in motor vehicles, in which a particulate filter and a SCR catalytic converter are arranged in the exhaust pipe in succession in the direction of flow, and having a reducing-agent supply, it being possible for ammonia to be added to the exhaust gas from the internal combustion engine on the entry side of the SCR catalytic converter by the reducing-agent supply. According to the invention, the exhaust-gas purification unit includes a hydrogen-generating unit for enriching the exhaust gas from the internal combustion engine with the hydrogen which it generates. Use in motor vehicles.

Abstract: An exhaust gas purification system for a motor vehicle having a reducing agent storage tank, and an associated operating method. In particular, an exhaust gas purification system for a motor vehicle, for which predetermined maintenance intervals is provided. The system includes a reducing agent storage tank for storing a reducing agent intended for exhaust gas purification. A method for operating a motor vehicle having an exhaust gas purification system and a reducing agent storage tank for storing a reducing agent intended for the exhaust gas purification, which comprises predetermined maintenance work after predetermined maintenance intervals is also provided.

Abstract: The invention proposes an exhaust-gas purification unit for purifying the exhaust gas from an internal combustion engine which is preferably operated in lean-burn mode, in particular a diesel engine used in motor vehicles, in which a particulate filter and a SCR catalytic converter are arranged in the exhaust pipe in succession in the direction of flow, and having a reducing-agent supply, it being possible for ammonia to be added to the exhaust gas from the internal combustion engine on the entry side of the SCR catalytic converter by the reducing-agent supply. According to the invention, the exhaust-gas purification unit includes a hydrogen-generating unit for enriching the exhaust gas from the internal combustion engine with the hydrogen which it generates. Use in motor vehicles.

Abstract: An exhaust gas purification unit for purifying the exhaust gas from an internal combustion engine which is preferably operated in lean burn mode, in particular a diesel engine used in motor vehicles, has a particulate filter and a SCR catalytic converter arranged in the exhaust pipe in succession in the direction of flow, and a reducing agent supply. Ammonia can be added to the exhaust gas from the internal combustion engine on the entry side of the SCR catalytic converter by the reducing agent supply. A hydrogen-generating unit enriches the exhaust gas from the internal combustion engine with generated hydrogen.

Abstract: The exhaust gas aftertreatment device according to the invention having a reforming unit for generating hydrogen by steam reforming, partial oxidation of hydrocarbons and/or mixed forms thereof is distinguished by the fact that the reforming unit is arranged directly in the main exhaust gas stream from an internal combustion engine. The steam and residual oxygen which are required for the reforming preferably originate from the exhaust gas. The step of providing the required reducing agents consists in briefly switching the internal combustion engine, which is predominantly operated in lean-burn mode and the exhaust gas from which is undergoing the aftertreatment, to rich-burn mode, allowing reforming by means of the reforming reactor according to the invention using the hydrocarbons that are present in the exhaust gas.

Abstract: The invention concerns an exhaust gas cleaning system for an internal combustion engine with at least one catalytically active component which is configured such that its catalytically active coating comprises at least a first region with high light-off temperature and a high temperature resistance and at least a second region with a low light-off temperature and a reduced temperature resistance (relative to the first region). The exhaust-gas-side surface of the catalytically active coating in the intake region of the catalytically active component has at least a partial diffusion layer, or is at least partially covered by a diffusion layer.

Abstract: 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.

Abstract: In an internal combustion engine having a plurality of cylinders, some of which can be deactivated during operation of the engine, the cylinders which can be deactivated during operation are configured specifically for high load engine operation and have a lower compression ratio ? than the rest of the cylinders, which are configured specifically for low load engine operation.

Abstract: An Exhaust-gas purification system for an internal combustion engine, which, as seen in the direction of flow of the exhaust gas, has a particle filter, apparatus for providing a reducing agent in the exhaust-gas flow, a catalytic converter for reducing nitrogen oxide which is present in the exhaust gas, and a downstream oxidation catalytic converter. An upstream oxidation catalytic converter is arranged upstream of the particle filter.

Abstract: 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.

Abstract: In an internal combustion engine having a plurality of cylinders, some of which can be deactivated during operation of the engine, the cylinders which can be deactivated during operation are configured specifically for high load engine operation and have a lower compression ratio ? than the rest of the cylinders, which are configured specifically for low load engine operation.

Abstract: The invention proposes an exhaust-gas purification unit for purifying the exhaust gas from an internal combustion engine which is preferably operated in lean-burn mode, in particular a diesel engine used in motor vehicles, in which a particulate filter and a SCR catalytic converter are arranged in the exhaust pipe in succession in the direction of flow, and having a reducing-agent supply, it being possible for ammonia to be added to the exhaust gas from the internal combustion engine on the entry side of the SCR catalytic converter by the reducing-agent supply.

Abstract: In a method for operating an internal combustion engine, and a motor vehicle to be heated by the engine coolant, wherein the internal combustion engine has a cooling circuit, a heating mode can be established in which operating parameters of the internal combustion engine, while satisfying required output set values, are set for the maximum possible introduction of heat into the coolant and the exhaust gas in order to reach or hold a desired coolant temperature.

Abstract: NOx is generated by means of a plasma-enhanced method which, with the addition of H2-containing gas, reduces NOx to NH3 and uses the thus obtained NH3 as the reducing agent for an SCR catalyst for exhaust emission control. A plasma reactor is provided in the corresponding apparatus for performing the method.