Abstract: The present application relates to a method for determining the exhaust back pressure p3 upstream of a turbine, which is arranged in the exhaust line of an internal combustion engine equipped with an engine management system (1), which exhaust line is intended to lead off the exhaust gas from a number cylinders of the internal combustion engine. The method includes determining the exhaust back pressure p3 upstream of a turbine, by means of which the exhaust back pressure p3 can still be determined precisely but at little cost compared to methods known in the state of the art.

Abstract: The description relates to an internal combustion engine having a turbocharger, having a first particle filter in the intake section of the internal combustion engine and having a low-pressure EGR line that comprises a second particle filter. A fast-reacting low-pressure exhaust gas recirculation system with small dimensions can be realized by virtue of the EGR line branching off from the exhaust section upstream of the first particle filter, and the second particle filter being provided with a heater. The description also relates to a corresponding EGR method.

Abstract: The invention relates to a control method for increasing the exhaust gas temperature of an internal combustion engine, which has at least one exhaust gas aftertreatment device in its exhaust tract, and which has an exhaust gas recirculation system, to which a regulating system is assigned. In order to increase the temperature of the exhaust gas and avoid engine oil dilution due to retarded post-injections, the regulating system increases the exhaust gas back-pressure while maintaining an exhaust gas recirculation rate, and increases a fuel injection quantity into the combustion chamber during the main injection.

Abstract: The present application relates to a method for determining the exhaust back pressure p3 upstream of a turbine, which is arranged in the exhaust line of an internal combustion engine equipped with an engine management system (1), which exhaust line is intended to lead off the exhaust gas from a number cylinders of the internal combustion engine. The method includes determining the exhaust back pressure p3 upstream of a turbine, by means of which the exhaust back pressure p3 can still be determined precisely but at little cost compared to methods known in the state of the art.

Abstract: An exhaust gas recirculation system for an internal combustion engine, which comprises an intake plenum, an exhaust gas system, and a fresh-air feed line and an exhaust gas recirculation line connected to the intake plenum, includes a sensor, arranged in the intake plenum for measuring an amount of an exhaust gas component, and a controller constructed for outputting a correcting variable based on the sensor and adjusting the percentage by mass of inert gas in the intake plenum on the basis of the correcting variable. The sensor arranged in the intake plenum is a gas concentration sensor which is equipped for determining the air ratio, the oxygen concentration or the carbon dioxide concentration in the intake plenum and to output as sensor variable a variable representing the air ratio, the oxygen concentration or the carbon dioxide concentration to controller.