Patent ID: 8606447
Filing Date: 2013-12-10
Classification: B60L,B60W,F02N,Y02T

Abstract:
1. A method for operating a powertrain system including an electric motor/generator, comprising: determining a first torque command for the electric motor/generator responsive to an operator torque request; determining a regenerative torque command for the electric motor/generator responsive to a commanded voltage across a high-voltage DC bus and a monitored voltage across the high-voltage DC bus; determining a speed-related torque command for the electric motor/generator responsive to a commanded rotational speed for the electric motor/generator; upon detecting an open high-voltage switch associated with a high-voltage DC electrical bus, operating the electric motor/generator in a fault tolerant electric generation mode comprising: operating an internal combustion engine to spin the electric motor/generator; and operating the electric motor/generator in the fault tolerant electric generation mode responsive to the regenerative torque command; else: operating the electric motor/generator responsive to the speed-related torque command in response to one of a commanded speed and a preferred speed profile and a measured rotational speed of the electric motor/generator when operating responsive to a command to control rotational speed of the electric motor/generator; or operating the electric motor/generator responsive to the first torque command.