Hybrid powertrain for vehicle e.g. car, has power transmission unit that is controlled such that drive shafts are decoupled if control unit recognizes free-wheel phase of powertrain shaft, so that motor unit is deactivated

摘要

#CMT# #/CMT# The hybrid powertrain has two motor units each having drive shaft for delivering and receiving mechanical power. A power transmission unit is coupled with the drive shafts such that a frictional connection between the drive shafts is enabled. The power transmission unit is controlled such that the drive shafts are decoupled if control unit recognizes the free-wheel phase of powertrain shaft, so that the motor unit is deactivated. The drive shafts are frictionally coupled if the end of free-wheel phase is recognized, so that the motor unit is activated. #CMT# : #/CMT# An independent claim is included for method for operating hybrid powertrain. #CMT#USE : #/CMT# Hybrid powertrain for vehicle such as car and truck. #CMT#ADVANTAGE : #/CMT# Desired drive properties can be attained without increasing the number of required motor units, so that the complexity of the entire powertrain is reduced. The wear of mechanical components of power transmission unit can be suppressed, so that long term stability of power transmission unit can be ensured. The mechanical losses of power transmission unit can be reduced. The generation of waste heat can be avoided. The hybrid powertrain of low weight, high efficiency and high robustness is provided. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a graph illustrating the relationship between velocity of propeller shaft and rotational torque of the powertrain. (Drawing includes non-English language text) A : Curve representing desired drive behavior of powertrain B : Curve representing profile of powertrain M : Rotational torque of the powertrain V : Velocity of propeller shaft.