Patent ID: 7766108

Claim:
Method for fast setting in motion of a vehicle, this method utilizing a power transmission device having an electrical machine connected firstly to a heat engine via a clutch and secondly to a shaft of wheels, in which, to make the vehicle accelerate quickly when it is stopped, wherein the method comprises: powering on the electrical machine, and starting the heat engine by transmitting to it a breakaway torque (CARR), at the same time as the electrical machine is powered on, using a starting system connected to the heat engine and mechanically independent of the electrical machine, and once the heat engine has been started, allowing the heat engine to run through its first compressions so that it is autonomous, then cutting off the starting system, and in a time period from a time when the clutch starts transmitting torque to a time period when the clutch becomes fully closed, making the torque (CMTH) of the heat engine and the torque (CMEL) of the electrical machine converge toward respective optimal setpoint values with respect to fuel consumption of the heat engine.