Patent ID: 7703283

Claim:
An automotive air blower system, comprising: a supercharger, comprising a centrifugal impeller wheel, connected to an output shaft of a transmission system, an input shaft of the transmission system being connected, in use, to an engine of a motor vehicle, the input and output shafts being connected to respective branches of a three-branch epicyclic differential gearset, one branch of the gearset and the input shaft being connected to a rotor of respective electrical machines, wherein a first of the electrical machines constitutes a motor/generator and a second of the electrical machines is configured to operate as a generator, wherein each of the first and second electrical machines comprise stators and electrical connections of the stators, wherein the electrical connections of the stators are connected to a controller configured to control a flow of electric power between the first and second electrical machines, wherein the epicyclic gearset comprises a sun wheel in engagement with a plurality of planet wheels, the planet wheels being carried by a common carrier and in engagement with an annulus wheel, and wherein the sun wheel is connected to the impeller wheel, the annulus wheel is connected to the input shaft, and the carrier is connected to the rotor of the second electrical machine.