Abstract: An electric motor has efficient self-cooling. The electric motor contains a rotor that is rotatably mounted with respect to a stator. On a first sub-segment of an end face of the rotor, a first air-guiding contour is formed that, during rotation of the rotor in a reference rotation direction, generates an outwardly directed air flow. On a second sub-segment of the same end face, a second air-guide contour is formed that, during rotation of the rotor in a reference rotation direction, generates an inwardly directed air flow.

Abstract: A method for plausibilizing a rail pressure sensor value of a rail pressure sensor of an internal combustion engine having a common rail system that has a fuel high-pressure piston delivery pump includes acquisition of the beginning of conveying by the piston delivery pump, calculation of the rail pressure from the compression work performed by the piston, and plausibilization of the rail pressure outputted by the rail pressure sensor on the basis of the calculated rail pressure.

Abstract: A method for monitoring a pressure sensor of a fuel metering system of an internal combustion engine, the metering system having a metering unit controlling the inflow of fuel into a rail; fuel being metered from the rail into combustion chambers of the engine; a pressure regulating valve being connected to the rail, using which the outflow of fuel from the rail into a low-pressure accumulator being regulated; and using the pressure sensor, the pressure is measured in the rail; and for a closed pressure regulating valve, the supplying of current to the pressure regulating valve is lowered until the regulating valve opens and effects a pressure drop in the rail and at least one pressure value recorded by the pressure sensor is compared to the pressure drop in the rail, and from the comparison result, a conclusion is drawn on the functional capability of the pressure sensor.

Abstract: A method for controlling a pressure control valve which controls the pressure in a high-pressure accumulator of a fuel metering system of an internal combustion engine, fuel being metered into the combustion chambers of the internal combustion engine from the high-pressure accumulator, and the pressure control valve being connected to the high-pressure accumulator and controlling the outflow of fuel from the high-pressure accumulator into a low-pressure accumulator, and it being provided, in particular, that in the case of a closed pressure control valve, the energization of the pressure control valve is reduced until the pressure control valve opens, and a close offset input is ascertained based on the energization present at the opening of the pressure control valve.

Abstract: A method for plausibilizing a rail pressure sensor value of a rail pressure sensor of an internal combustion engine having a common rail system that has a fuel high-pressure piston delivery pump includes acquisition of the beginning of conveying by the piston delivery pump, calculation of the rail pressure from the compression work performed by the piston, and plausibilization of the rail pressure outputted by the rail pressure sensor on the basis of the calculated rail pressure.

Abstract: An electric motor has efficient self-cooling. The electric motor contains a rotor that is rotatably mounted with respect to a stator. On a first sub-segment of an end face of the rotor, a first air-guiding contour is formed that, during rotation of the rotor in a reference rotation direction, generates an outwardly directed air flow. On a second sub-segment of the same end face, a second air-guide contour is formed that, during rotation of the rotor in a reference rotation direction, generates an inwardly directed air flow.