Abstract: A method for controlling an internal combustion engine, in which, based on a rail pressure signal, a first characteristic variable is specified that indicates a misfire, a misfire being recognized when the rail pressure signal does not have the expected curve.

Abstract: A method for controlling an internal combustion engine, in which, based on a rail pressure signal, a first characteristic variable is specified that indicates a misfire, a misfire being recognized when the rail pressure signal does not have the expected curve.

Abstract: A method for determining an exhaust gas temperature of an internal combustion engine, which is performed by measuring a lambda value of the exhaust gas of the internal combustion engine and calculating a calculated exhaust gas temperature as a function of the measured lambda value, and comparing the calculated exhaust gas temperature with a measured exhaust gas temperature and adapting a function used for the calculation as a function of the comparison.

Abstract: A method for determining an exhaust gas temperature of an internal combustion engine, which is performed by measuring a lambda value of the exhaust gas of the internal combustion engine and calculating a calculated exhaust gas temperature as a function of the measured lambda value, and comparing the calculated exhaust gas temperature with a measured exhaust gas temperature and adapting a function used for the calculation as a function of the comparison.

Abstract: A method and device for testing a fuel metering system. A control unit checks the injector contacts during the initialization phase prior to starting up the fuel metering system. For the test, the injectors are activated by the control unit, and the current values and/or voltage values are evaluated to detect errors. The control unit controls the fuel metering process during operation.

Abstract: A method and a device for operating an internal combustion engine make it possible to monitor a temperature sensor or a lambda sensor in an exhaust system of the internal combustion engine for functionality in the entire operating range of the internal combustion engine. To that end, the plausibility of the signal of the temperature sensor is checked with a signal of the lambda sensor for a predetermined relationship.

Abstract: A method and a device for operating an internal combustion engine make it possible to monitor a temperature sensor or a lambda sensor in an exhaust system of the internal combustion engine for functionality in the entire operating range of the internal combustion engine. To that end, the plausibility of the signal of the temperature sensor is checked with a signal of the lambda sensor for a predetermined relationship.

Abstract: A method and a device for operating a combustion engine allow a plausibility check of two pressure sensors in a mass-flow line of the combustion engine in any operating range of the combustion engine. At least one component effecting a pressure drop is provided in the mass-flow line, and a first pressure is measured upstream from the at least one component with the aid of a first pressure sensor, and a second pressure is measured downstream from the at least one component with the aid of a second pressure sensor. The first pressure sensor and the second pressure sensor are checked for plausibility as a function of at least one modeled variable characterizing at least one pressure drop in the mass-flow line between the first pressure sensor and the second pressure sensor.

Abstract: A method and a device for operating a combustion engine allow a plausibility check of two pressure sensors in a mass-flow line of the combustion engine in any operating range of the combustion engine. At least one component effecting a pressure drop is provided in the mass-flow line, and a first pressure is measured upstream from the at least one component with the aid of a first pressure sensor, and a second pressure is measured downstream from the at least one component with the aid of a second pressure sensor. The first pressure sensor and the second pressure sensor are checked for plausibility as a function of at least one modeled variable characterizing at least one pressure drop in the mass-flow line between the first pressure sensor and the second pressure sensor.

Abstract: A method and a device for regulating the boost pressure of an internal combustion engine having a multiflow air system, which enables both rapid regulation and limitation of the exhaust gas back pressures. The multiflow air system includes a multichannel air supply and a corresponding multichannel exhaust gas discharge, each exhaust gas channel having an exhaust gas turbocharger. A manipulated variable for a specified boost pressure to be set is determined as a function of the actual exhaust gas back pressure prevailing in the particular exhaust gas channel.

Abstract: A method and a device for operating an internal combustion engine make it possible to set a setpoint value for the overall fresh air mass flow as the top control target. The internal combustion engine has a multi-flow air system including a multi-channel air supply and a corresponding multi-channel exhaust gas discharge, exhaust gas being recirculated from the multi-channel exhaust gas discharge into the multi-channel air supply and the exhaust gas recirculation being regulated for setting a setpoint fresh air mass flow. A value for the required overall fresh air mass flow of the internal combustion engine is predefined for at least one exhaust gas recirculation channel as the setpoint for the exhaust gas regulation.

Abstract: A method and a device for operating an internal combustion engine make it possible to set a setpoint value for the overall fresh air mass flow as the top control target. The internal combustion engine has a multi-flow air system including a multi-channel air supply and a corresponding multi-channel exhaust gas discharge, exhaust gas being recirculated from the multi-channel exhaust gas discharge into the multi-channel air supply and the exhaust gas recirculation being regulated for setting a setpoint fresh air mass flow. A value for the required overall fresh air mass flow of the internal combustion engine is predefined for at least one exhaust gas recirculation channel as the setpoint for the exhaust gas regulation.

Abstract: A method and a device for regulating the boost pressure of an internal combustion engine having a multiflow air system, which enables both rapid regulation and limitation of the exhaust gas back pressures. The multiflow air system includes a multichannel air supply and a corresponding multichannel exhaust gas discharge, each exhaust gas channel having an exhaust gas turbocharger. A manipulated variable for a specified boost pressure to be set is determined as a function of the actual exhaust gas back pressure prevailing in the particular exhaust gas channel, a total specified exhaust gas back pressure being determined by a first controller from the difference between the specified boost pressure and an actual boost pressure, and a specified exhaust gas back pressure being determined for the individual exhaust gas channels from the total specified exhaust gas back pressure as a function of a difference between the air mass flows supplied via the air channels of the internal combustion engine.

Abstract: A method and device for testing a fuel metering system. A control unit checks the injector contacts during the initialization phase prior to starting up the fuel metering system. For the test, the injectors are activated by the control unit, and the current values and/or voltage values are evaluated to detect errors. The control unit controls the fuel metering process during operation.