Hybrid powertrain unit for motor vehicles

摘要

A hybrid powertrain unit includes an internal-combustion engine, and a gearbox device with a primary shaft that can be connected to the shaft of the internal-combustion engine via a clutch device. The gearbox device includes a secondary shaft with an output pinion meshing with a first crown wheel of a differential, the casing of which is rigidly connected to the casing of the gearbox device. An electrical machine is designed to function as electric motor and as electric generator, having a shaft connected by a transmission to a second crown wheel of the differential. An engagement device driven via an electronic control actuator is set between the shaft of the electrical machine and the second crown wheel. The electrical machine can be set coaxially to the output shafts of the differential or parallel thereto. Alternatively, the shaft of the electrical machine may be connected to the shaft of the internal-combustion engine by means of a belt transmission and engagement device.

主权项

1. A hybrid powertrain unit for a motor vehicle, comprising:
an internal-combustion engine; and a gearbox device including:
at least one primary shaft, that can be connected to a crankshaft of the motor vehicle by means of a clutch device,at least one secondary shaft comprising an axis parallel to and at a distance from an axis of said primary shaft, said at least one secondary shaft carrying an output pinion;a plurality of pairs of gears corresponding to a plurality of forward gear ratios, in which a first gear of each pair is rigidly connected in rotation with respect to a first shaft of said primary and secondary shafts and a second gear of each pair is mounted freely rotatable on a second shaft of said primary and secondary shafts; anda plurality of gear-selection devices for coupling in rotation each of said freely rotatable gears with the second shaft on which is mounted, a differential, having a first crown wheel meshing with said output pinion of said secondary shaft of the gearbox device; an electrical machine designed to operate both as an electric motor and as an electrical generator and having a casing rigidly connected to a casing of said differential, and a shaft connected by a transmission to a second crown wheel of said differential; an engagement device set in said transmission for connection between a shaft of the electrical machine and the second crown wheel of the differential; an actuator for actuating said engagement device; and the shaft of the electrical machine sharing axes of two output shafts of the differential.