Method for re-integrating an internal combustion engine into a drive train of a vehicle

摘要

Method for re-integrating an internal combustion engine (2) into a drive train (1) of a vehicle (50), the drive train (1) comprising a crankshaft, a transmission (4) and a dual-mass flywheel (6) with a combustion engine via the crankshaft (2) connected primary flywheel mass and a secondary flywheel mass connected via at least one clutch (7, 8) to the transmission (4): operating the drive train (1) with the internal combustion engine (2) switched off; Receiving a request (40) to restart the internal combustion engine (2); Determining the crank angle (41) of the crankshaft and establishing a target crank angle (42) for engaging the dual-mass flywheel (6); Applying a specified maximum torque to the secondary flywheel mass (43) if the determined crank angle corresponds to the specified target crank angle; otherwise, determining (44) whether and to what extent damping of the torsional vibration of the dual-mass flywheel (6) excited by the application of a torque to the secondary flywheel mass is possible by means of the gas pressure in the cylinders; if damping by means of the gas pressure in the cylinders is possible, determining and applying a torque of the secondary flywheel mass (45) which is adapted to the extent of the possible damping; otherwise, applying (46) a fixed torque, which is increased with a fixed, preferably low, gradient, to the secondary flywheel mass.