Three-shaft hybrid transmission for a motor vehicle and control method

摘要

A hybrid transmission for a motor vehicle including a heat engine and electric drive machine, including two primary shafts respectively connected to the heat engine and electric machine, each supporting at least one intermediate drive on a first secondary shaft connected to wheels via a differential and a second secondary shaft sending motion of a primary shaft to the differential. A first coupling between the two primary shafts can occupy at least three positions of: the heat engine is uncoupled from the drive train connecting the electric machine to the wheels, or coupled by the second secondary shaft; the primary shaft connected to the heat engine is coupled to the first secondary shaft to drive the wheels with or without support of the electric machine; the primary shaft connected to the heat engine is coupled to the primary shaft connected to the electric machine, to add respective torques thereof.

主权项

1. A hybrid transmission for a motor vehicle that includes a thermal engine and an electric drive machine, comprising:
two concentric primary shafts, including a first primary shaft directly connected to the thermal engine and a second primary shaft directly connected to the electric machine, each supporting at least one intermediate drive on a first secondary shaft connected to wheels of the vehicle via a differential and a second secondary shaft transmitting movement of at least one of the two primary shafts to the differential; a first coupling between the two primary shafts, and the first coupling is configured to move in at least three positions, in which: the first coupling, in a first position of the at least three position, is decoupled from a first torque flow path connecting the electric machine to the wheels when the electric machine drives the wheels, and the first coupling is decoupled from a second torque flow path connecting the thermal engine to the wheels when the thermal engine drives the wheels, the second torque flow path including the second secondary shaft, the first coupling, in a second position of the at least three position, couples the first primary shaft directly connected to the thermal engine to the first secondary shaft to drive the wheels with or without a contribution made by the electric machine, and the first coupling, in a third position of the at least three position, couples the first primary shaft directly connected to the thermal engine to the second primary shaft directly connected to the electric machine, to add together their respective torques in a direction of the wheels.