Patent ID: 7770676
Filing Date: 2010-08-10
Classification: B60K,B60L,B60W,Y02T,Y10S

Abstract:
1. A method for operating a parallel hybrid powertrain ( 1 ) of a vehicle to minimize torque fluctuations in an output of the powertrain caused by starting a combustion engine, the parallel hybrid powertrain comprising at least one internal combustion engine ( 2 ) and at least one electric motor ( 3 ), the electric motor ( 3 ) being located in the powertrain between the internal combustion engine ( 2 ) and the output of the powertrain ( 1 ), a frictionally engaged shifting element ( 5 ) being located between the internal combustion engine ( 2 ) and the electric motor ( 3 ), a starting element ( 6 ), comprising a hydrodynamic torque converter ( 6 A) and a converter lock-up clutch ( 6 B), being located between the electric motor ( 3 ) and the output, and a target output torque (m_fahr_soll) directed to the output being dependent on slippage of the starting element ( 6 ), the method comprising the steps of: generating an input torque with the electric motor ( directing an amount of the input torque to the combustion engine ( during a starting phase in which the electric motor ( regulating slippage of the starting element (