Patent ID: 9744872
Date: 2017-08-29
CPC Classifications: B60K,B60L,B60W,B60Y,E02F,Y02T,Y10S

Claim:
1. A self-propelling work machine having an electric drive comprising at least one electric motor; the work machine further comprising a generator drivable by an internal combustion engine and for supplying the electric drive with electric current; the work machine further comprising a braking apparatus for braking the work machine, wherein the braking apparatus provides a regenerative braking by the electric drive and comprises a feedback apparatus for feedback of electrical motor braking power of the electric motor to the generator, wherein a braking control apparatus is provided for automatic connection of at least one mechanical brake in dependence on the electrical motor braking power fed back to the internal combustion engine and/or on an operating state of the internal combustion engine acted on by the fed back motor braking power, wherein the braking control apparatus comprises a first braking stage in which the braking power takes place only by way of electric motor braking and of applying the electrical motor braking power on the internal combustion engine, wherein, in a first sub-stage, a fuel supply to the internal combustion engine is first reduced with a constant engine speed and, in a second sub-stage with a cut-off fuel supply, a speed increase of the internal combustion engine is permitted for increasing the braking power until a predefined maximum speed is reached.