Abstract: A method for manufacturing a sensor in which a sensor element, which comprises at least a first housing, is at least partially encapsulation-molded in an encapsulation-molding process. As a result of the encapsulation-molding process a sensor housing is formed. The sensor element is mechanically connected to a support element and/or accommodated by the support element, after which the sensor element and the support element are encapsulation-molded in a common encapsulation-molding process for forming the sensor housing.

Abstract: The invention concerns a method and a device for testing the function capacity of an NO oxidation catalyst (5) which is used to reduce nitrous oxides (NOx) contained in the exhaust gas flow of an internal combustion engine (1) operated with air surplus. In the exhaust gas flow which is supplied to the NO oxidation catalyst (5), a change is made in the concentration of a reducing agent and the resulting change in NOx concentration in the exhaust gas flow within the NO oxidation catalyst (5) and/or downstream after the NO oxidation catalyst (5) is determined and used to test its function capacity.

Abstract: An exhaust gas after-treatment system for an internal combustion engine, with a particle filter arranged downstream of an internal combustion engine for filtering soot out of the exhaust gas, and with an oxidation catalytic converter arranged upstream of the particle filter and downstream of the internal combustion engine for the oxidation of SO2 into SO3. The SO3 and/or precipitated H2SO4 serves for the oxidation of soot in the particle filter and thus for the regeneration of the particle filter.

Abstract: A method for calibrating an exhaust gas sensor arranged in a measurement chamber, includes providing a measurement chamber in or adjacent to an exhaust channel of an internal combustion engine. At the start of a calibration phase, exhaust gas present in the measurement chamber is displaced by a filling of the measurement chamber with calibration gas, and at the end of the calibration phase, exhaust gas diffuses into and/or is introduced into the measurement chamber.

Abstract: A device and a method for regenerating a particulate filter that is arranged in the exhaust tract of an internal combustion engine. There is disposed at least one NO oxidation catalytic converter upstream of the particulate filter for the oxidation of NO, and in particular to form NO2. At least one heating device is also provided upstream of the particulate filter, by way of which an exhaust-gas flow that is conducted towards the particulate filter can be heated to a defined temperature in accordance with defined regeneration parameters, in particular in accordance with a degree of loading of the particulate filter and/or in accordance with an efficiency of an NO2-based regeneration of the particulate filter by way of an NO2 quantity formed in the at least one NO oxidation catalytic converter.

Abstract: A method and a device for operating a sensor is provided in an exhaust gas system of an internal combustion engine for determining the emissions contained in an exhaust gas flow, in particular, of nitrogen oxides, ammonia, oxygen and/or unburnt carbon, with the exhaust gas flow acting on the sensor during measurement phases. Between the measurement phases, the sensor is at least largely kept free from the exhaust gas flow, wherein the duration and/or the frequency of the measurement phases can be set as a function of operating parameters of the internal combustion engine and/or of the exhaust gas regulation system. A measurement space which surrounds the sensor is exposed to a pressurized flushing gas immediately after a measurement phase, as a result of which the exhaust gas present in the measurement space is displaced out of the measurement space into the exhaust gas flow.

Abstract: A catalyst especially for oxidation of exhaust gas constituents, for example nitrogen oxide, preferably nitrogen monoxide, consists of a particulate support material composed of titanium-containing nanoparticles, preferably titanium oxide nanoparticles, especially titanium dioxide nanoparticles coated with platinum, especially platinum particles. A process for producing such a catalyst.

Abstract: A method for manufacturing a sensor in which a sensor element, which comprises at least a first housing, is at least partially encapsulation-molded in an encapsulation-molding process. As a result of the encapsulation-molding process a sensor housing is formed. The sensor element is mechanically connected to a support element and/or accommodated by the support element, after which the sensor element and the support element are encapsulation-molded in a common encapsulation-molding process for forming the sensor housing.

Abstract: An exhaust gas retreatment system of an internal combustion engine includes a particle filter; and a sensor positioned, in a flow direction of the exhaust gas, downstream of the particle filter. The sensor is configured to measure the oxygen content and/or the NOx content in the exhaust gas downstream of the particle filter.

Abstract: A method for desulphurizing an exhaust-gas recirculation flow of an internal combustion engine supplied to the internal combustion engine on the fresh-air side includes branching a partial exhaust-gas flow from the exhaust-gas flow of the internal combustion engine. At least one reactant is supplied to the partial exhaust-gas flow that splits to form ammonia, and the thus laden partial exhaust-gas flow is supplied partially, as an exhaust-gas recirculation flow, to the fresh-air side and partially, as an aftertreatment partial flow, to an exhaust-gas aftertreatment system. The flow rate of the exhaust-gas recirculation flow supplied to the fresh-air side and the flow rate of the aftertreatment partial flow supplied to the exhaust gas aftertreatment system are predefined and/or varied by a regulating device as a function of at least one operating parameter that defines the respective operating state of the internal combustion engine.

Abstract: A method for producing a sensor element, wherein at least parts of the sensor element are subjected to at least one plasma treatment process during production. The plasma treatment process may be either a plasma cleaning process and/or a plasma activation process. During the plasma treatment process, a base element and/or a carrier element of the sensor element is subjected to a plasma treatment process before a placement process and/or before a contact-connecting process with electrical connection means. The sensor element is equipped with at least one measurement probe element and/or at least one electronic circuit. This method is used to produce a sensor element, such as a speed sensor element, that may be used in a motor vehicle.

Abstract: A method and to a device for the regeneration of a particle filter arranged in the exhaust gas tract of an internal combustion engine with at least one NO oxidation catalyst for the oxidation of NO, especially to NO2, which is arranged upstream of the particle filter and through which an exhaust gas stream flows. At least one heater, especially a heating catalyst, through which another gas stream, i.e., a second exhaust gas stream, flows and which heats the additional gas steam, is provided upstream of the particle filter. The heated additional gas stream is mixed upstream of the particle filter with the exhaust gas stream coming from the NO oxidation catalyst, i.e., the gas stream loaded in particular with NO2.

Abstract: A device for the aftertreatment of exhaust gases in an exhaust gas system of internal combustion engines, having at least one reductant decomposition catalyst. Arranged in the exhaust gas flow, and a metering device arranged upstream of the latter in an exhaust gas line for supplying reductant. Preferably at least one other catalyst device is provided downstream of the reductant decomposition catalyst. An inlet section for the exhaust gas having at least one flow deflection area is arranged upstream of the reductant decomposition catalyst and constructed for the exhaust gas to be fed into a housing radially outside an inlet pipe adjoining the reductant decomposition catalyst that encloses the inlet pipe, and is guided in counterflow through a front inlet opening of the inlet pipe to the reductant decomposition catalyst. The reductant is fed into the flow deflection area associated with the inlet opening.

Abstract: A method for calibrating an exhaust gas sensor arranged in a measurement chamber, includes providing a measurement chamber in or adjacent to an exhaust channel of an internal combustion engine. At the start of a calibration phase, exhaust gas present in the measurement chamber is displaced by a filling of the measurement chamber with calibration gas, and at the end of the calibration phase, exhaust gas diffuses into and/or is introduced into the measurement chamber.

Abstract: A method and a device for operating a sensor is provided in an exhaust gas system of an internal combustion engine for determining the emissions contained in an exhaust gas flow, in particular, of nitrogen oxides, ammonia, oxygen and/or unburnt carbon, with the exhaust gas flow acting on the sensor during measurement phases. Between the measurement phases, the sensor is at least largely kept free from the exhaust gas flow, wherein the duration and/or the frequency of the measurement phases can be set as a function of operating parameters of the internal combustion engine and/or of the exhaust gas regulation system. A measurement space which surrounds the sensor is exposed to a pressurized flushing gas immediately after a measurement phase, as a result of which the exhaust gas present in the measurement space is displaced out of the measurement space into the exhaust gas flow.

Abstract: A method and apparatus for converting an alcohol into a fuel mixture which consists of alcohol, ether and water and is suitable for operating a combustion engine, in particular an internal combustion engine in a motor vehicle, converts the alcohol into the fuel mixture in a reactor at a suitable reaction temperature. The mixing ratio of alcohol fraction, ether fraction and water fraction in the fuel mixture is adjusted by controlling at least one reaction parameter of a reaction taking place in the reactor.

Abstract: A catalyst especially for oxidation of exhaust gas constituents, for example nitrogen oxide, preferably nitrogen monoxide, consists of a particulate support material composed of titanium-containing nanoparticles, preferably titanium oxide nanoparticles, especially titanium dioxide nanoparticles coated with platinum, especially platinum particles. A process for producing such a catalyst.

Abstract: A method for use with an exhaust gas post-treatment system on an internal combustion engine operated with air surplus includes reducing nitrous oxides in that an ammonia-separating reducing agent is added to the exhaust gas flow upstream of a catalyst which is charged with a catalyst material for selective catalytic reduction of nitrous oxides. The method further provides that the NH3 to NOx ratio (feed ratio ?) is varied in phases by changing the untreated nitrous oxide emissions of the internal combustion engine such that the feed ratio ? oscillates in phases about a predefined value.

Abstract: The invention concerns a method and a device for testing the function capacity of an NO oxidation catalyst (5) which is used to reduce nitrous oxides (NOx) contained in the exhaust gas flow of an internal combustion engine (1) operated with air surplus. In the exhaust gas flow which is supplied to the NO oxidation catalyst (5), a change is made in the concentration of a reducing agent and the resulting change in NOx concentration in the exhaust gas flow within the NO oxidation catalyst (5) and/or downstream after the NO oxidation catalyst (5) is determined and used to test its function capacity.

Abstract: A method for use with an exhaust gas post-treatment system on an internal combustion engine operated with aft surplus includes reducing nitrous oxides in that an ammonia-separating reducing agent is added to the exhaust gas flow upstream of a catalyst which is charged with a catalyst material for selective catalytic reduction of nitrous oxides. The method further provides that the NH3 to NOx ratio (feed ratio ?) is varied in phases by changing the untreated nitrous oxide emissions of the internal combustion engine such that the feed ratio ? oscillates in phases about a predefined value.