Powertrain for use in motor car with combustion engine, has spring supported by damper mass on auxiliary units at starting phase of combustion engine in rotational direction, where damper mass is flexibly coupled with crank shaft

摘要

The powertrain (1) has a belt (7) including auxiliary units (13, 14), and a dual-mass flywheel (3) including primary flywheel mass (4), where the drive and the flywheel are provided at ends of the powertrain. A crank shaft is driven opposite to a secondary flywheel mass (6) rotating against effect of a spring (5), and a starter starts a combustion engine by intervention on the primary flywheel mass. The spring includes a single-step curve, and is supported by damper mass on the units at starting phase of the engine in rotational direction, where the damper mass is flexibly coupled with shaft.