Abstract: The disclosure relates to a device and a method for sintering. The device for sintering comprises an electrically conductive first component, an electrically conductive second component and at least one electrically conductive surface element for heating a green body to be sintered. The first component and the second component are movable relative to each other and/or relative to the surface element such that an electrical circuit comprising the first component, the surface element and the second component can be closed by the relative movement. In this way, a rapid sintering process is enabled on an industrial scale. The device can be integrated in a particularly simple manner into existing sintering plants, for example, a FAST/SPS sintering plant.

Abstract: A method for use in conjunction with an exhaust gas post-treatment system for metering an ammonia-releasing reducing agent into the exhaust gas stream of an internal combustion engine installed in a motor vehicle and operating with excess air. A control unit meters the quantity of reducing agent as a function of a stored model and, during the operation of the internal combustion engine, determines, by comparison of a value proportional to the nominal emission or the nominal conversion stored in the control unit of the internal combustion engine for the associated operating point of the internal combustion engine and/or of the exhaust gas post-treatment system with a value proportional to the actual emission or the actual conversion metrologically determined by the control unit.

Abstract: A method for use in conjunction with an exhaust gas post-treatment system for metering an ammonia-releasing reducing agent into the exhaust gas stream of an internal combustion engine installed in a motor vehicle and operating with excess air. A control unit meters the quantity of reducing agent as a function of a stored model and, during the operation of the internal combustion engine, determines, by comparison of a value proportional to the nominal emission or the nominal conversion stored in the control unit of the internal combustion engine for the associated operating point of the internal combustion engine and/or of the exhaust gas post-treatment system with a value proportional to the actual emission or the actual conversion metrologically determined by the control unit.

Abstract: In a method for reducing NOx in the exhaust gas of an externally ignited, explosion-type internal combustion engine that is operated at a lean fuel/air ratio of ?>1 and has a motor control device for controlling ?, the ? value is slidingly controlled as a function of an average mass temperature in the combustion chamber of the externally ignited, explosion-type internal combustion engine, wherein for a low average mass temperature ? is decreased and for a high average mass temperature ? is increased such that the internal combustion engine is operated in any operational state close to the misfiring limit, and thereby, with the most minimal NOx emission possible.

Abstract: In a method for reducing NOx in the exhaust gas of an externally ignited, explosion-type internal combustion engine that is operated at a lean fuel/air ratio of &lgr;>1 and has a motor control device for controlling &lgr;, the &lgr; value is slidingly controlled as a function of an average mass temperature in the combustion chamber of the externally ignited, explosion-type internal combustion engine, wherein for a low average mass temperature &lgr; is decreased and for a high average mass temperature &lgr; is increased such that the internal combustion engine is operated in any operational state close to the misfiring limit, and thereby, with the most minimal NOx emission possible.