Abstract: The invention relates to a control method for increasing the exhaust gas temperature of an internal combustion engine by increasing the exhaust back-pressure, yet maintaining an exhaust gas recirculation rate. Further, the fuel injection quantity of a main injection into the engine is increased. In this way, it is possible to increase the temperature of the exhaust gas and avoid engine oil dilution due to retarded post-injections.

Abstract: Feedback control of an internal combustion engine is performed based on a signal from a vibration sensor and a crankshaft angle sensor. An energy factor can be computed based on these sensor signals. A vector of energy factor can be computed as a function of crank angle degree over a particular window of engine rotation of interest. Based on the energy factor vector, combustion phasing can be estimated.

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 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: A method of operating a diesel engine in a mechanical apparatus is disclosed, wherein the diesel engine includes a combustion chamber, and wherein the mechanical apparatus also including a catalyst configured to treat NOx emissions from the diesel engine. The method includes performing at least one early homogenization combustion in the combustion chamber, determining a temperature of the catalyst, and if the temperature of the catalyst is equal to or below a preselected temperature threshold, then performing at least one late homogenization combustion or diffusion combustion in the combustion chamber to raise a temperature of exhaust provided to the catalyst.

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 invention relates to a method of performing feedback control of the operation of an internal combustion engine based on a signal from a vibration sensor and a crankshaft angle sensor. An energy factor can be computed based on these sensor signals which provides an estimate of the combustion phasing and combustion intensity. A vector of energy factors can be computed as a function of crank angle degree over a particular window of engine rotation of interest. Based on the energy factor vector, combustion phasing can be estimated.

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.

Abstract: A method of operating a diesel engine in a mechanical apparatus is disclosed, wherein the diesel engine includes a combustion chamber, and wherein the mechanical apparatus also including a catalyst configured to treat NOx emissions from the diesel engine. The method includes performing at least one early homogenization combustion in the combustion chamber, determining a temperature of the catalyst, and if the temperature of the catalyst is equal to or below a preselected temperature threshold, then performing at least one late homogenization combustion or diffusion combustion in the combustion chamber to raise a temperature of exhaust provided to the catalyst.

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.