Method for selecting the target state of a drive train

A method for selecting a target state of a vehicle driveline connecting at least a combustion engine and/or an electric machine to the wheels of the vehicle by a transmission, from a set of states present on the transmission, which are defined by various combinations of couplers and reduction gears thereof in order to transfer torque from the combustion engine and/or from the electric machine to the wheels over one or more gear ratios, comprising:

• filtering to determine, from a list of available states, state consecutive eligible sets as a function of combined driveability constraints, the filtering comprising:
• a first filtering step of considering all of the available states from the set of states present on the transmission and outputting vectors including a first vector representative of the available states and a second vector representative of the authorized states in a full electric mode,
• after the first filtering step, a second filtering step linked to a man-machine interface of a driver and to an engaged energy mode, the second filtering step including:
• selecting a selected vector from the first vector or the second vector based on the engaged energy mode,
• performing further filtering the selected vector based on an output of the man-machine interface;
• and
• outputting a third vector based on the further filtering,
• after the second filtering step, a third filtering step of filtering the third vector based on speed constraints, and
• after the third filtering step, a fourth filtering step of filtering a fourth vector output from the third filtering step based on force constraints of the driveline.