Patent ID: 7163071
Filing Date: 2007-01-16
Classification: B60K,B60L,B60W,Y02T

Abstract:
1. A method for operating a non-rail bound land motor vehicle operable in essentially steady-state operating phases and having a drive system comprising an internal combustion engine-generator unit; at least one electric drive motor; a power command signal generator operable by a driver of the motor vehicle, for the at least one electric drive motor; and an electronic control system connected to the internal combustion engine-generator unit, to the electric motor, and to the power command signal generator, the method comprising: controlling the internal combustion engine-generator unit with the electronic control system so that the motor vehicle is operated in the essentially steady-state operating phases with respective combinations of supplied torque and rotational speed of the internal combustion engine which are favorable to fuel consumption; and in association with a transition from a first operating phase of the motor vehicle having a first power state of the at least one electric drive motor and/or at least one secondary current load to a second operating phase of the motor vehicle having a higher second power state of the at least one electric drive motor and/or the at least one secondary current load, temporarily reducing the electrical power demanded by the at least one electric drive motor and/or by the at least one secondary current load so that the total electrical power demanded by the at least one electric drive motor and/or by the at least one secondary current load is smaller than before the temporary reduction, a magnitude of the temporary reduction in the demand for electrical power by the at least one electric drive motor and/or by the at least one secondary current load varying as a function of the difference between the first power state and the higher, second power state, whereby a faster transition of the internal combustion engine from a first power output level to a higher second power output level is achieved.