Patent ID: 8996216
Filing Date: 2015-03-31
Classification: B60L,B60W,Y02T

Abstract:
1. A method for operating a vehicle electrical system of a motor vehicle which includes at least one energy store, the motor vehicle having an internal combustion engine and an electric machine mechanically coupled thereto, an actuatable accelerator pedal for predefining a torque which may be output at least by the internal combustion engine, an engine controller for injection of fuel into the internal combustion engine, and an actuatable brake pedal, the method comprising: activating a controller subject to first operating conditions, wherein by at least partially actuating the brake pedal, a recuperative power of the electric machine is generated at a same time that energy is fed into the vehicle electrical system; and switching, using the controller, the electric machine to a recuperative mode of operation, if a driver request is inferred due to an actuation of the accelerator pedal, resulting in a braking power of the vehicle, the injection of the internal combustion engine being maintained due to second operating conditions; wherein a generator torque and thus the recuperative power are increased by the controller to a threshold torque value, the second operating conditions including at least one of a catalytic converter being below a first threshold temperature value and the internal combustion engine being below a second threshold temperature value, and the threshold torque value is defined such that an injection quantity does not increase due to recuperation.