Abstract: A method for operating a drive device includes heating a hot air stream with a heating device integrated in a cylinder head of an internal combustion engine of the drive device, wherein the internal combustion engine is connected with an exhaust gas system; mixing the hot air stream upstream of a catalytic converter with a cold fresh air stream for adjusting a defined temperature of the hot air stream; and supplying the hot air stream having the adjusted defined temperature to the catalytic converter in at least one operating state of the internal combustion engine so as to heat the catalytic converter.

Abstract: A method for operating a drive device includes heating a hot air stream with a heating device integrated in a cylinder head of an internal combustion engine of the drive device, wherein the internal combustion engine is connected with an exhaust gas system; mixing the hot air stream upstream of a catalytic converter with a cold fresh air stream for adjusting a defined temperature of the hot air stream; and supplying the hot air stream having the adjusted defined temperature to the catalytic converter in at least one operating state of the internal combustion engine so as to heat the catalytic converter.

Abstract: The invention relates to a method for operating an internal combustion engine comprising at least one turbocharger, at least one catalytic converter and a variable valve train, a valve overlap parameter being determined in at least one operating mode of the internal combustion engine and being used to set the valve train. According to the invention, the valve overlap parameter is adapted on the basis of at least one parameter for the condition of the catalytic converter and/or at least one parameter for the condition of the turbocharger, prior to being used to set the valve train. The invention also relates to an internal combustion engine.

Abstract: A method for operating a drive device includes heating a hot air stream with a heating device integrated in a cylinder head of an internal combustion engine of the drive device, wherein the internal combustion engine is connected with an exhaust gas system; mixing the hot air stream upstream of a catalytic converter with a cold fresh air stream for adjusting a defined temperature of the hot air stream; and supplying the hot air stream having the adjusted defined temperature to the catalytic converter in at least one operating state of the internal combustion engine so as to heat the catalytic converter.

Abstract: A method for operating a drive device having an internal combustion engine and an exhaust gas purification device for exhaust gas of the internal combustion engine includes performing an oxygen removal operation for removing oxygen from the exhaust gas purification device, wherein the oxygen removal operation includes at least one of operating the internal combustion engine sub-stoichiometrically and introducing additional fuel into the exhaust gas, wherein the oxygen removal operation is performed until a lambda value detected by a lambda probe arranged in the exhaust gas purification device reaches a defined lambda threshold value.

Abstract: A method for operating a drive device for a motor vehicle, said method includes: permanently supplying an entire exhaust gas of a drive aggregate of the drive device to a turbine of an exhaust gas turbocharger of the drive device via a variable turbine geometry and providing compressed air by means of a compressor coupled with the turbine for the drive aggregate; operating in at least one operating mode of the drive device in each operating point of the drive aggregate an electric machine, which is mechanically operatively connected with the turbine and the compressor, as a generator for braking the turbine; and braking the turbine by means of the electric machine the stronger the further a throttle flap arranged fluidly between the compressor and the drive aggregate is opened, while maintaining the operating point of the drive aggregate constant.

Abstract: The invention relates to a method for operating an internal combustion engine comprising at least one turbocharger, at least one catalytic converter and a variable valve train, a valve overlap parameter being determined in at least one operating mode of the internal combustion engine and being used to set the valve train. According to the invention, the valve overlap parameter is adapted on the basis of at least one parameter for the condition of the catalytic converter and/or at least one parameter for the condition of the turbocharger, prior to being used to set the valve train. The invention also relates to an internal combustion engine.

Abstract: A method for operating a drive device for a motor vehicle, said method includes: permanently supplying an entire exhaust gas of a drive aggregate of the drive device to a turbine of an exhaust gas turbocharger of the drive device via a variable turbine geometry and providing compressed air by means of a compressor coupled with the turbine for the drive aggregate; operating in at least one operating mode of the drive device in each operating point of the drive aggregate an electric machine, which is mechanically operatively connected with the turbine and the compressor, as a generator for braking the turbine; and braking the turbine by means of the electric machine the stronger the further a throttle flap arranged fluidly between the compressor and the drive aggregate is opened, while maintaining the operating point of the drive aggregate constant.

Abstract: A method for operating a drive device having an internal combustion engine and an exhaust gas purification device for exhaust gas of the internal combustion engine includes performing an oxygen removal operation for removing oxygen from the exhaust gas purification device, wherein the oxygen removal operation includes at least one of operating the internal combustion engine sub-stoichiometrically and introducing additional fuel into the exhaust gas, wherein the oxygen removal operation is performed until a lambda value detected by a lambda probe arranged in the exhaust gas purification device reaches a defined lambda threshold value.

Abstract: The invention relates to an intercooler for a motor vehicle with an internal combustion engine that is supercharged in steps. In this case, the intercooler has an air outlet opening as well as two air inlet openings, a heat exchanger module being associated with each air inlet opening. Air channels of the two heat exchanger modules are ultimately brought together in an air box of the intercooler, which is connected to the air outlet opening. It is thus made possible to bring together compressed charging air from two supercharging assemblies only in the area of the intercooler. To improve the pressure ratios during operation of only one supercharging assembly, a non-return valve is provided in an air channel. Thus, a module for separately bringing the airways together can be eliminated, thereby reducing the installation space requirement.

Abstract: A method for operating a drive device includes heating a hot air stream with a heating device integrated in a cylinder head of an internal combustion engine of the drive device, wherein the internal combustion engine is connected with an exhaust gas system; mixing the hot air stream upstream of a catalytic converter with a cold fresh air stream for adjusting a defined temperature of the hot air stream; and supplying the hot air stream having the adjusted defined temperature to the catalytic converter in at least one operating state of the internal combustion engine so as to heat the catalytic converter.

Abstract: The invention relates to a method for operating an internal combustion engine comprising at least two cylinders respectively provided with admission valves and exhaust valves. According to the invention, in order to fill the cylinders with a larger amount of unburned gas during a gas exchange, the exhaust interval is reduced and the crossover phase of admission and exhaust intervals is extended, for at least one cylinder (3). The invention also relates to an internal combustion engine for carrying out said method.

Abstract: The invention relates to an internal combustion engine with at least one cylinder which has at least two exhaust valves which are connected to exhaust gas lines in which there are the turbines of the exhaust gas turbochargers which have compressors for the charging air of internal combustion engines. It is provided that downstream from the compressors there is a merge (23) for the charging air flows (21) of the compressors and that there is at least one externally controllable valve (25) downstream from at least one of the compressors and upstream from the merge (23). Furthermore, the invention relates to a method for operating such an internal combustion engine. It is provided that downstream from the compressors the charging air flows of the compressors are merged and that at least downstream from one of the compressors and upstream from the merge, externally controllable blocking or choking of at least one of the charging air flows can take place.

Abstract: The invention relates to an intercooler for a motor vehicle with an internal combustion engine that is supercharged in steps. In this case, the intercooler has an air outlet opening as well as two air inlet openings, a heat exchanger module being associated with each air inlet opening. Air channels of the two heat exchanger modules are ultimately brought together in an air box of the intercooler, which is connected to the air outlet opening. It is thus made possible to bring together compressed charging air from two supercharging assemblies only in the area of the intercooler. To improve the pressure ratios during operation of only one supercharging assembly, a non-return valve is provided in an air channel. Thus, a module for separately bringing the airways together can be eliminated, thereby reducing the installation space requirement.

Abstract: A method of diminishing the thermal effects of the exhaust gas recirculation in an internal combustion engine of a motor vehicle generally consisting of sensing the temperature of the gas at a selected point along the flow thereof, comparing the sensed temperature with a selected temperature and adjusting the supply of the gas responsive to a selected deviation of the sensed temperature from the selected temperature.

Abstract: The invention relates to a method for operating an internal combustion engine comprising at least two cylinders respectively provided with admission valves and exhaust valves. According to the invention, in order to fill the cylinders with a larger amount of unburned gas during a gas exchange, the exhaust interval is reduced and the crossover phase of admission and exhaust intervals is extended, for at least one cylinder (3). The invention also relates to an internal combustion engine for carrying out said method.

Abstract: In order to reduce fuel consumption and exhaust gas emissions in an internal combustion engine, diesel as well as spark-ignition engines, on the one hand by means of exhaust gas recirculation, but on the other to be able to use temperature-sensitive intake manifolds of economical plastics, a temperature sensor (12) measures the temperature at a definable point in the intake area, preferably in the intake manifold (9) where the highest temperature occurs. The amount of recirculated exhaust gas (1) is set by a control means (8) such that the temperature measured at a definable point does not exceed a definable maximum value, the boundary temperature of the material from which the intake manifold (9) is made, or is adjusted to this maximum value.