Abstract: The invention relates to an internal combustion engine with an air intake system and an exhaust system is embodied as an internal combustion engine, in particular a gasoline engine, that is charged by means of an exhaust gas turbocharger. At least one three-way catalytic converter is arranged in the exhaust system of the internal combustion engine. Furthermore, a low-pressure exhaust gas recirculation system is provided that connects the exhaust system downstream from a turbine of the exhaust gas turbocharger and upstream from the at least one three-way catalytic converter to the air intake system upstream from a compressor of the exhaust gas turbocharger. The invention further relates to a method for exhaust aftertreatment of such an internal combustion engine.

Abstract: The invention relates to a method for determining a value of an integer scaling in a linking of input sets to output sets, wherein the linking comprises operators, each of which has operator inputs and operator outputs that are at least partially linked to one another or to the input sets or to the output sets, by using a computer device having a processing unit, a memory unit, and an output unit. Representations of set objects are used to efficiently carry out rescaling operations within the linking, with up to infinitely large resolution sets. This procedure makes it possible to calculate resource-conserving integer scalings for a target system while taking secondary conditions into account.

Abstract: The invention relates to an exhaust gas aftertreatment system for a spark ignition internal combustion engine based on the Otto principle. The internal combustion engine is connected on the outlet side to an exhaust gas system, wherein an electrically heatable three-way catalytic converter, a four-way catalytic converter downstream from the electrically heatable three-way catalytic converter, and a further three-way catalytic converter downstream from the four-way catalytic converter are situated in the exhaust gas system in the flow direction of an exhaust gas through the exhaust gas system. Before the internal combustion engine is started, the electrically heatable three-way catalytic converter and preferably also the four-way catalytic converter are heated to allow efficient exhaust gas aftertreatment of the untreated emissions of the internal combustion engine upon starting the internal combustion engine.

Abstract: An exhaust gas aftertreatment system for an internal combustion engine comprises an exhaust gas system with an exhaust gas channel in which at least two exhaust gas aftertreatment components for the selective, catalytic reduction of nitrogen oxides are arranged. Downstream from the first exhaust gas aftertreatment component and upstream from the second exhaust gas aftertreatment component is a burner with which the exhaust gas can be heated up before it enters the second exhaust gas aftertreatment component. Downstream from the second exhaust gas aftertreatment component is an oxidation catalytic converter that converts unburned hydrocarbons. In a method for exhaust gas aftertreatment in an internal combustion engine having such an exhaust gas aftertreatment system, the exhaust gas from the internal combustion engine is heated up by the burner in order to heat up the second exhaust gas aftertreatment component for the selective, catalytic reduction of nitrogen oxides.