Drive train operating method for motor vehicle, involves completely closing clutch before reaching synchronous speed between internal combustion engine and electric motor, where speed of motor is larger than starting speed of engine

摘要

The method involves starting an internal combustion engine (2) such that a clutch (4) is closed when an electric motor (3) is driven. The clutch is closed and opened in a controlled manner for starting the engine such that the clutch is brought to a slip by partial closing of the clutch for starting the engine, when the motor is coupled at an output in a torque-proof manner and/or without traction power interruption. The clutch is completely closed before reaching a synchronous speed between the engine and motor, where speed of the motor is larger than starting speed of the engine.