Electric propulsion system for vehicles

摘要

A propulsion system includes two electric motors, a gearbox with at least three forward gears and a control unit to control the electric motors and the engagement of the gears. The gearbox includes two primary shafts, one associated to with the odd gears and the other with the even gears and are permanently connected each to a respective electric motor. The control unit controls the two electric motors and the engagement of the gears of the gearbox to provide at least a first operating mode in which the first gear and the second gear are engaged at the same time and a second operating mode in which the second gear and the third gear are engaged at the same time. In each of these operating modes the torque being transmitted by both the electric motors.

主权项

1. An electric propulsion system for vehicles, comprising a first and a second electric motor, a gearbox with at least three forward gears and a control unit arranged to control the first and the second electric motor and to control the engagement of the gears of the gearbox,
wherein the gearbox comprises a first primary shaft associated to odd gears and is permanently torsionally connected to the first electric motor and a second primary shaft associated to even gear(s) and is permanently torsionally connected to the second electric motor, and the control unit is arranged to control the first and the second electric motor and to control the engagement of the gears of the gearbox to provide at least a first operating mode in which the first gear and the second gear are engaged at the same time and a second operating mode in which the second gear and the third gear are engaged at the same time, in each of said operating modes the torque being transmitted both by the first electric motor and the second electric motor through the first primary shaft and the second primary shaft, respectively.