Patent ID: 9707956
Date: 2017-07-18
CPC Classifications: B60K,B60W,F16H,Y02T,Y10S,Y10T

Claim:
1. A powertrain for a vehicle having front wheels and rear wheels, the powertrain comprising: an engine with a crankshaft; a first motor-generator drivingly connected to the crankshaft via an endless rotatable device; a transmission having a transmission input member driven by the crankshaft and a transmission output member; a driveshaft operatively connected with the output member; a rear differential operatively connectable with the driveshaft and configured to transfer torque from the driveshaft to rear half shafts that are connectable to the rear wheels; wherein the rear differential includes a rotatable differential carrier; a second motor-generator drivingly connected to the rear differential and positioned at least partially rearward of the rear half shafts; wherein the second motor-generator has a motor shaft with an axis of rotation generally parallel with the driveshaft; a gearing arrangement configured to multiply torque from the second motor-generator to the rear half shafts; a controller operatively connected to the second motor-generator and operable to control the second motor-generator to function as a motor providing driving torque to the rear half shafts through the rear differential; a pinion shaft operatively connectable to the driveshaft; a bevel gear set having a first bevel gear fixed to the pinion shaft, and a second bevel gear fixed to the differential carrier and meshing with the first bevel gear; a cross shaft fixed to and extending forward from the motor shaft generally parallel with the driveshaft; wherein the gearing arrangement includes a first transfer gear fixed to the cross shaft, and a second transfer gear fixed to the pinion shaft and meshing with the first transfer gear; and wherein the gearing arrangement is configured to multiply torque from the cross shaft to the pinion shaft.