Method and System for Coupling an Electric Machine to a Vehicle Running Gear, Especially for a Hybrid Vehicle

Abstract

To couple an electric machine (42) with running-gear wheels (44) of a vehicle when the vehicle is running, the method comprises two steps activated in succession on the basis of a coupling request; a step of driving the electric machine (42) up to speed, in which a rotation rate command is applied to the electric machine (42) so as to reduce a déviation between the speed of an upstream dog clutch (51) rotating integrally with the electric machine and the speed of a downstream dog clutch (52) rotating integrally with the wheels (44); and an engagement step activated following a déviation (110) in speed that is below a predetermined threshold, in which the electric machine (42) is slaved to a torque command and the dog clutches (51, 52) are brought together until a state of positive interlock of the two dog clutches is obtained.

Dependencies are inferred from the claim text.