Patent ID: 8142327

Claim:
Method for controlling the coupling or the decoupling of a first motor and a second motor of a parallel hybrid drive train of the type comprising a first electric motor that drives a main shaft, a second motor, and a coupling/decoupling means for the second motor and the first motor, maneuverable between an open position and a closed position, according to which the drive train is controlled so that the rotation speed of the main shaft remains unchanged at the moment of coupling and decoupling, wherein a control law is used to control the drive train that generates a discontinuity between the torque Cap,d delivered to the main shaft when the first and second motors are decoupled and the torque Cap,c delivered to the main shaft when the first and second motors are coupled, which is selected so as to offset the difference between the inertia Jap,d carried by the main shaft when the first and second motors are decoupled and the inertia Jap,c carried by the main shaft when the first and second motors are coupled in order to maintain a continuity in the acceleration of the main shaft driven by the motor motors at the moment of coupling or decoupling.