Liebherr-components Biberach Gmbh

Liebherr-werk Biberach Gmbh

Juergen Resch

Oliver Fenker

Burkhard Emanuel Richthammer

Bernd Sommer

Markus Merkle

Stefan Duelli

Sebastien Nicolas Hoffmann

Michael Palberg

A construction machine, in particular in the form of a crane, cable excavator or similar, comprising an electronic control device for controlling and/or detecting operating parameters, in addition to at least one drive device for moving a functional element, especially a load take-up means. The functional element of the construction machine is guided in the desired direction by the exertion of manipulation forces on the functional element, or on a component fastened thereto, or the functional element is moved manually in a designated direction, this motion then being assisted by the drives of the construction machine. If the functional element is manually pressed or pulled in a designated direction and/or rotated, or if this is at least attempted, these motion attempts are detected and converted into a corresponding positioning motion of the construction machine.

Construction machine

Methods and systems are provided related to a self-propelling work machine in the form of a tracked vehicle having an electric drive, with a generator drivable by an internal combustion engine, an auxiliary unit connected to the engine, and a braking apparatus for braking the work machine. The braking apparatus provides regenerative braking by the electric drive and comprises a feedback apparatus for feeding back electrical motor braking power of the electric motor to the generator to apply the motor braking power on the engine and on the auxiliary unit. A controller automatically increases or decreases the electrical load of the auxiliary unit based on the electrical motor braking power fed back to the engine and/or based on an engine speed.

Self-propelling work machine and method for braking such a work machine

The application describes a self-propelling work machine, in the form of a truck, having an electric drive comprising at least one electric motor, a generator drivable by an internal combustion engine for the power supply of the electric drive, and a braking apparatus for braking the work machine, wherein the braking apparatus provides a regenerative braking by the electric drive and a feedback apparatus for feeding back electrical motor braking power of the electric motor to the generator to apply the motor braking power on the internal combustion engine. The application further describes a method for braking the work machine. A braking control apparatus is provided for an automatic connection of a mechanical brake in dependence on the motor braking power fed back to the internal combustion engine and/or in dependence on the operating state of the internal combustion engine acted on by the fed back motor braking power.

A truck has improved control with a plurality of wheels each having a single wheel drive and a device for controlling speed and/or torque of the single wheel drives. The control device has a separate controller train for each wheel drive, with each controller train having a differential controller for correcting divided torque depending on steering angle and a wheel slip controller correcting the divided torque or torque value corrected by the differential controller depending on wheel slip and providing a corresponding single wheel drive torque value.

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Degernau, Germany

Juergen Resch