Abstract: A method for detecting a sticking tank vent valve in a motor vehicle, a temperature sensor being situated in a tank vent line between the tank vent valve and an inlet point into an intake manifold or into a turbocharger and sticking of the tank vent valve being detected when the absolute value of a correlation of a calculated tank ventilation mass flow and of a signal value of the temperature sensor violates a predefinable threshold value.

Abstract: A method and a corresponding system for detecting a malfunction in an electric drive unit. The method comprises the following steps: ascertain (S17) a current flow characteristic (1) of an electric drive unit; detect (S33) a gradient change in the current flow characteristic (1) at a first point in time (t=n); compare (S35, S39) the gradient change with a predefinable gradient change range; establish (S45) a malfunction in the electric drive unit if the gradient change is outside the predefinable gradient change range.

Abstract: A method for detecting a sticking tank vent valve in a motor vehicle, a temperature sensor being situated in a tank vent line between the tank vent valve and an inlet point into an intake manifold or into a turbocharger and sticking of the tank vent valve being detected when the absolute value of a correlation of a calculated tank ventilation mass flow and of a signal value of the temperature sensor violates a predefinable threshold value.

Abstract: The invention relates to a system (1) and to a corresponding method for tank leakage diagnosis. The system (1) comprises a fuel tank (3), a pressure source (5, 9), and a pressure sensor (7). The pressure source (5, 9) is configured to increase the pressure in the fuel tank (3). The pressure sensor (7) is configured to detect the pressure progression at the fuel tank (3). The system (1) is configured to seal the fuel tank (3) in a gas-tight manner such that the fuel tank (3) can be used as a pressure store. Furthermore, the system (1) is configured to conclude, independently of a current operation of the pressure source (5, 9) based on the determined pressure progression at the fuel tank (3), that a leak is present.

Abstract: A method for ascertaining the charging of a store for hydrocarbons originating from a fuel tank of a vehicle is characterized in that the charging of the store is determined from a variable characterizing the fuel outgassing with the aid of a model which maps the vapor pressure curve of the fuel.

Abstract: The invention relates to a system (1) and to a corresponding method for tank leakage diagnosis. The system (1) comprises a fuel tank (3), a pressure source (5, 9), and a pressure sensor (7). The pressure source (5, 9) is configured to increase the pressure in the fuel tank (3). The pressure sensor (7) is configured to detect the pressure progression at the fuel tank (3). The system (1) is configured to seal the fuel tank (3) in a gas-tight manner such that the fuel tank (3) can be used as a pressure store. Furthermore, the system (1) is configured to conclude, independently of a current operation of the pressure source (5, 9) based on the determined pressure progression at the fuel tank (3), that a leak is present.

Abstract: A method for actuating at least one camshaft, operable independently of a crankshaft, of an internal combustion engine includes: a) when the internal combustion engine is standing still, the at least one camshaft is actuated in such a way that a delivery stroke of a high-pressure pump of a high-pressure fuel injection device takes place; and b) during a subsequent reverse rotation of the at least one camshaft into the starting position, a quantity control valve of the high-pressure pump is not actuated.

Abstract: A method and a corresponding system for detecting a malfunction in an electric drive unit. The method comprises the following steps: ascertain (S17) a current flow characteristic (1) of an electric drive unit; detect (S33) a gradient change in the current flow characteristic (1) at a first point in time (t=n); compare (S35, S39) the gradient change with a predefinable gradient change range; establish (S45) a malfunction in the electric drive unit if the gradient change is outside the predefinable gradient change range.

Abstract: A method for monitoring the leak tightness of a fuel tank system is provided, the fuel tank system being provided for supplying fuel to a supercharged internal combustion engine. A pressure accumulator is filled from the supercharged intake manifold area of the internal combustion engine. The pressure from the pressure accumulator is transferred to the fuel tank system, which includes in particular the fuel tank and, if necessary, an activated carbon filter. The pressure curve in the closed fuel tank system is observed. A leak in the fuel tank system may be inferred on the basis of the pressure curve, if necessary.