Abstract: A method for monitoring a secondary air supply in an internal combustion engine. The method includes: a) determining, with the aid of a throttle equation and according to a pressure in the secondary air supply, a first secondary air mass flow in relation to the effective throttle area; b) determining a second secondary air mass flow based on a measured exhaust gas lambda value and taking into account a primary air mass flow of the internal combustion engine and a supplied fuel mass flow; c) deriving an effective throttle area from the first secondary air mass flow determined in step a) and the second secondary air mass flow determined in step b); d) monitoring the effective throttle area obtained in this way using at least one specified threshold value.

Abstract: A method for heating an exhaust system downstream from an internal combustion engine using an electrical heating device. The method includes an ascertainment of a current temperature in the exhaust system, an ascertainment of a current temperature of the electrical heating device and a fluid mass flow flowing through the electrical heating device, an ascertainment of a heating requirement based on the ascertained current temperature and a target temperature, a calculation of a required amount of heat depending on the heating requirement and an amount of energy required to heat up the electrical heating device, taking into account a heat input into the fluid mass flow to be expected at the ascertained current temperature of the electrical heating device, and a control of the electrical heating device to generate the calculated amount of heat. A computing unit and a computer program are also described.

Abstract: A method for heating an exhaust system downstream from an internal combustion engine using an electrical heating device. The method includes an ascertainment of a current temperature in the exhaust system, an ascertainment of a current temperature of the electrical heating device and a fluid mass flow flowing through the electrical heating device, an ascertainment of a heating requirement based on the ascertained current temperature and a target temperature, a calculation of a required amount of heat depending on the heating requirement and an amount of energy required to heat up the electrical heating device, taking into account a heat input into the fluid mass flow to be expected at the ascertained current temperature of the electrical heating device, and a control of the electrical heating device to generate the calculated amount of heat. A computing unit and a computer program are also described.

Abstract: A method for controlling heat transport within an exhaust gas system downstream of an internal combustion engine, wherein the exhaust gas system comprises at least one electrical heating device, at least one exhaust gas purification component, and at least one fluid transport device, wherein the method comprises, in an operating phase in which the internal combustion engine is not operated, determining at least one current temperature in the exhaust gas system, performing a comparison of the at least one determined current temperature or a temperature derived therefrom with a target temperature, and controlling the electrical heating device and/or the fluid transport device as a function of the result of the comparison. Furthermore, a computing unit and a computer program for carrying out such a method are proposed.

Abstract: A method for controlling an internal combustion engine including at least one exhaust-gas aftertreatment component having an electric heating element, the electric heating element heating the exhaust-gas aftertreatment component and the exhaust gas flowing through the exhaust-gas aftertreatment component, the electric heating element briefly or permanently being acted upon by a heating current, a gas, in particular fresh air and/or exhaust gas, flowing downstream through the exhaust-gas path.

Abstract: A method for controlling an internal combustion engine including at least one exhaust-gas aftertreatment component having an electric heating element, the electric heating element heating the exhaust-gas aftertreatment component and the exhaust gas flowing through the exhaust-gas aftertreatment component, the electric heating element briefly or permanently being acted upon by a heating current, a gas, in particular fresh air and/or exhaust gas, flowing downstream through the exhaust-gas path.

Abstract: A method (200) for heating an exhaust system (120) downstream of an internal combustion engine (1) by means of an electric heating device (14, 15). In one example, the method includes determining a current temperature (t_EHC, t_EHC{circumflex over (?)}Us, t_Cat) in the exhaust system (120), determining a heating demand (t_EHC{circumflex over (?)}Des) based on the determined current temperature (t_Cat) and a target temperature, calculating a required amount of heat (Pwr{circumflex over (?)}Des) on the basis of the heating demand and an amount of energy required to heat the electric heating device (14, 15), and controlling (Pwr{circumflex over (?)}Req) the electric heating device (14, 15) to generate the calculated amount of heat.

Abstract: A method (200) for operating an exhaust-gas catalytic converter (130) with central coordination of heating measures that are intended to heat the exhaust-gas catalytic converter (130) to a temperature level at which the reactions to be catalyzed take place with an adequate reaction rate (so-called catalytic converter window). Through the central coordination of the heating measures on the basis of defined heating strategies, in which in each case one or more of the available heating measures are combined with one another in an expedient manner, the required outlay in terms of control can be considerably reduced, and mutual interference of the heating measures can be avoided.

Abstract: A method (200) for heating an exhaust system (120) downstream of an internal combustion engine (1) by means of an electric heating device (14, 15). In one example, the method includes determining a current temperature (t_EHC, t_EHC{circumflex over (?)}Us, t_Cat) in the exhaust system (120), determining a heating demand (t_EHC{circumflex over (?)}Des) based on the determined current temperature (t_Cat) and a target temperature, calculating a required amount of heat (Pwr{circumflex over (?)}Des) on the basis of the heating demand and an amount of energy required to heat the electric heating device (14, 15), and controlling (Pwr{circumflex over (?)}Req) the electric heating device (14, 15) to generate the calculated amount of heat.

Abstract: A method (200) for operating an exhaust-gas catalytic converter (130) with central coordination of heating measures that are intended to heat the exhaust-gas catalytic converter (130) to a temperature level at which the reactions to be catalyzed take place with an adequate reaction rate (so-called catalytic converter window). Through the central coordination of the heating measures on the basis of defined heating strategies, in which in each case one or more of the available heating measures are combined with one another in an expedient manner, the required outlay in terms of control can be considerably reduced, and mutual interference of the heating measures can be avoided.

Abstract: A pressure sensor for measuring a pressure of a fluid medium in a measuring chamber is provided. The pressure sensor includes a sensor housing, a first pressure-sensor module for measuring at least one first pressure of the medium in a first measuring chamber, and a second pressure-sensor module for measuring at least one second pressure of the medium in a second measuring chamber. The first pressure-sensor module and the second pressure-sensor module are situated inside the sensor housing. In addition, the pressure sensor has at least one first pressure connection, which is designed for the connection to the first measuring chamber. Moreover, the pressure sensor has at least one second pressure connection, which is developed for the connection to the second measuring chamber. The first pressure connection differs from the second pressure connection.

Abstract: A method and a unit for operating or for the operation of a fuel metering system of an internal combustion engine, in particular in a motor vehicle, and it being provided, in particular, that at least one operating variable of the internal combustion engine is detected, a dynamic operating state of the internal combustion engine is detected based on the at least one detected operating variable, and a dynamic correction to the fuel metering system of the internal combustion engine is carried out for a detected dynamic operating state of the internal combustion engine, taking into account the efficiency of an NOx exhaust gas aftertreatment system.

Abstract: A method for reducing exhaust gas emissions during a transient transitional phase of a vehicle including an internal combustion engine and an electric machine or an alternative ancillary unit, the method including, in the transient transitional phase, over a period of time defined by a dynamic indicator for determining the transient transitional phase, a correction intervention is carried out by a load point reduction of the internal combustion engine and, simultaneously thereto, a torque substitution by a transient torque applied by the electric machine or the alternative ancillary unit.

Abstract: A method for detecting and describing a transient driving situation of a motor vehicle having an internal combustion engine having a boost pressure control system or intake manifold pressure control system, wherein an indicator for identifying the transient driving situation is determined from a relative boost pressure/intake manifold pressure control deviation.

Abstract: A method and a device for operating an exhaust gas recirculation of a self-ignition internal combustion engine, in particular of a motor vehicle, the internal combustion engine including an air system for controlling the air supply into at least one combustion chamber of the internal combustion engine, and it being provided in particular that a dynamic operating state of the internal combustion engine is detected and, in the event of a detected dynamic operating state, a corrective intervention in the air system of the internal combustion engine is carried out.

Abstract: A pressure sensor for measuring a pressure of a fluid medium in a measuring chamber is provided. The pressure sensor includes a sensor housing, a first pressure-sensor module for measuring at least one first pressure of the medium in a first measuring chamber, and a second pressure-sensor module for measuring at least one second pressure of the medium in a second measuring chamber. The first pressure-sensor module and the second pressure-sensor module are situated inside the sensor housing. In addition, the pressure sensor has at least one first pressure connection, which is designed for the connection to the first measuring chamber. Moreover, the pressure sensor has at least one second pressure connection, which is developed for the connection to the second measuring chamber. The first pressure connection differs from the second pressure connection.

Abstract: A method and a unit for operating or for the operation of a fuel metering system of an internal combustion engine, in particular in a motor vehicle, and it being provided, in particular, that at least one operating variable of the internal combustion engine is detected, a dynamic operating state of the internal combustion engine is detected based on the at least one detected operating variable, and a dynamic correction to the fuel metering system of the internal combustion engine is carried out for a detected dynamic operating state of the internal combustion engine, taking into account the efficiency of an NOx exhaust gas aftertreatment system.

Abstract: A method for diagnosing a differential pressure sensor situated in an air duct of an internal combustion engine, including: selecting a tolerance range for an output signal of the differential pressure sensor, within which a predetermined pressure difference is to be interpreted; and ignoring an error, in which the output signal of the differential pressure sensor falls out of the tolerance range, if, first of all, a predetermined operating situation prevails, in which the predetermined pressure difference is considered to be applied to the differential pressure sensor, and secondly, a disturbance pressure is detected in the air duct.

Abstract: A method for reducing exhaust gas emissions during a transient transitional phase of a vehicle including an internal combustion engine and an electric machine or an alternative ancillary unit, the method including, in the transient transitional phase, over a period of time defined by a dynamic indicator for determining the transient transitional phase, a correction intervention is carried out by a load point reduction of the internal combustion engine and, simultaneously thereto, a torque substitution by a transient torque applied by the electric machine or the alternative ancillary unit.

Abstract: A method for correcting an offset for a pressure difference measured using a differential pressure sensor situated in an air duct. The offset is computed using an output signal of a pressure sensor, including: transferring the air duct into a predetermined operating situation in which a predetermined pressure difference is considered to be applied to the differential pressure sensor, measuring a level of the output signal in the predetermined operating situation, and computing the offset based on the measured level of the output signal.