Patent ID: 6962550
Filing Date: 2005-11-08
Classification: B60K,B60L,B60W,Y02T,Y10T

Abstract:
1. A control system for a vehicle with a first powertrain and a second powertrain, the first powertrain including an engine and being coupled with a first set of road wheels, the second powertrain including an electric motor and being coupled with a second set of road wheels, the vehicle including a generator coupled with the engine, the generator being provided as a source of electric power for the electric motor, the control system comprising: control logic for determining whether or not there is a need for a predetermined scheme, which is planned to prevent the motor from applying running resistance to the second set of road wheels; and control logic for executing the predetermined scheme in response to the need, wherein the first powertrain includes an automatic transmission that has various speed ratios of input to output shafts thereof, and wherein the predetermined scheme includes: controlling the automatic transmission to affect engine speed and hence generator speed in such a manner for the generator as to produce electric power high enough for the motor to output torque that overcomes road load from the second set of road wheels.