Starting and/or positioning system and method

System according to one of the preceding claims, characterized in that the positive value of the torque (T2) is a constant value.

System according to one of the preceding claims, characterized in that the torque (T2) has a negative value when the speed (S1) of the electric machine (S/G) is negative.

System according to one of the preceding claims, characterized in that the torque (T2) has a negative value when the speed (S1) of the electric machine (S/G) is negative and the speed (S2) of the crankshaft (CS) of the internal combustion engine (ICE) is greater than or equal to zero.

System according to one of the preceding claims, characterized in that the torque (T2) has a negative value when the speed (S1) of the electric machine (S/G) is negative, the speed (S2) of the crankshaft (CS) of the internal combustion engine (ICE) is greater than or equal to zero, and the torque (T3) is less than a specified value.

System according to one of the preceding claims, characterized in that the negative value of the torque (T2) is a constant value.

System according to one of the preceding claims, characterized in that, when the speed (S1) of the electric machine (S/G) is negative, the torque (T2) is brought to a positive value when the speed (S2) of the crankshaft (CS) of the internal combustion engine (ICE) is less than zero.

System according to one of the preceding claims, characterized in that a model calculation is used to estimate the torque (T3) that takes into account the speed (S2) of the crankshaft (CS) of the internal combustion engine (ICE), the speed (S1) of the electric machine (S/G), and the characteristic curve of the spring of the spring-and-damper assembly (S/D).

System according to one of the preceding claims, characterized in that the spring-and-damper assembly (S/D) has a spring that is progressive when torsion is positive.

System according to one of the preceding claims, characterized in that the electric machine (S/G) has a rotor that forms the secondary mass of a dual-mass flywheel.

System according to one of the preceding claims, characterized in that a first speed sensor (SS1) is provided that detects the speed (S2) of the crankshaft (CS) of the internal combustion engine (ICE).

System according to one of the preceding claims, characterized in that a second speed sensor (SS2) is provided that detects the speed (S1) of the electric machine (S/G).

System according to one of the preceding claims, characterized in that the output signal of the first speed sensor (SS1) and/or the output signal of the second speed sensor (SS2) is fed to the circuit.

System according to one of the preceding claims, characterized in that the electric machine (S/G) is connected to a vehicle transmission (VT) by way of a clutch (C).

Method for starting and/or positioning an internal combustion engine (ICE) that comprises the control of an electric machine (S/G) connected by way of a spring-and-damper assembly (S/D) to an internal combustion engine (ICE) having a total start-up torque (T1), characterized in that the control takes place in such a way that the electric machine (S/G) activates the spring-and-damper assembly (S/D) with a torque (T2) in a wave form, the amplitude of which is smaller than the total start-up torque T1, and that the spring-and-damper assembly (S/D)—at least in a steady-state condition—transmits a torque (T3) to the internal combustion engine (ICE), the amplitude of which is greater than or equal to the total start-up torque (T1).