Patent ID: 8812182

Claim:
A method for operating a control system of a vehicle, the control system having an engine control device for controlling a first axle drive device by means of a connected combustion engine to drive a first axle of the vehicle, and an electric axle control device for controlling a second electric axle drive device to drive a second axle of the vehicle, the method comprising: simulating travel of the vehicle on the route in a two-wheel drive mode in which only the first axle is driven, and then in a four-wheel drive mode in which both axles are driven for determining a route section suitable for a four-wheel drive mode in which the vehicle axles are driven by the first and second axle drive devices; comparing the simulations for the two-wheel drive mode and the four-wheel drive mode; determining a route section in which the vehicle passes more quickly in the simulation in the four-wheel drive mode than in the two-wheel drive mode; and storing the route section for the four-wheel drive mode and at least one characteristic diagram for driving the first axle drive device in the four-wheel drive mode; calling the characteristic diagram by the electric axle control device when the second axle drive device is actuated by the electric axle control device to drive the second axle; and passing the characteristic diagram to the engine control device for the controlling the first axle drive device on the basis of the characteristic diagram to drive the first axle.