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Assistance Systems Crawler Dozers

Digitalisation, Assistance Systems & Machine Control

Liebherr driver assistance systems - increased performance through efficient crawler dozer blade control

In the face of the constantly increasing pressures on time and costs, construction machines have to meet the highest demands, both in terms of speed and precision in operati-on, in order to win through. For this very reason, automatic machine control and operator assistance systems are being used ever more extensively to increase the productivity of operator and machine.

These make use of digitised planning data to automatically control the machine equipment when removing or laying down material. With the assistance of the latest technology, it is possible to produce complex surface areas and exact grading both quickly and precisely.

Because of their innovative drive systems, Liebherr crawler dozers are ideally suited to the application of automatic con-trols. The hydrostatic drive ensures smooth propulsion, free from gear changes and jerky movements. Optimum grading properties are ensured due to the long running gear and the perfect match of front equipment to the operating hydraulics and the base machine. The low centre of gravity enables safe operation even on steep slopes and steeply inclined terrain.

How driver assistance systems work

1) Continuous detection of the blade position: The integrated sensors continuously determine the current position of the blade.

2) Comparison of blade position with planning data: The target surface is specified digitally (terrain model) or via laser beams. A control unit compares the actual and target values and transfers control instructions to the crawler dozer operating hydraulics.

3) Active guidance of the blade: The lifting height and tilt of the blade are automatically monitored and controlled, thus enabling complex 2D and 3D terrain models to be modelled directly.

The right control technology for every application

The new assistance systems in generation 8 crawler dozers include three levels of driver support: Free Grade for active blade stabilisation during fine grading; Definition Grade for automatic blade positioning when creating simple 2D surfaces, 3D Grade from Topcon as optional GNSS machine control for modelling complex terrain forms. In addition, the option is available to order factory installed ready-kits, which allow a range of machine control systems from Trimble and Leica to be retrofitted in the field.

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Free Grade

  • Active blade stabilisation (pitch and roll)
  • Simplified creation of level surfaces, ramps, dams and fine grading
  • Increased productivity with simultaneous time saving
  • Improved quality with less experienced operators and less stress for experienced operators
  • Greater safety on the construction site as more attention is given to what is going on around the machine
  • Fallback solution in place of laser or GPS systems

Applications:

  • Creation of flat surfaces
  • Graphical display of the blade and track position

Definition Grade

  • Automatic blade position control at a specified target angle for modelling simple 2D surfaces
  • Cost savings as there is no need for additional equipment
  • Operation is independent of local conditions
  • Increased productivity with simultaneous time saving
  • Greater safety on the construction site as more attention is given to what is going on around the machine

Applications:

  • Creation of horizontal or inclined planes
  • Suitable for small to medium-sized construction sites
  • Used for landscaping sports fields, constructing roads and car parks and constructing industrial and commercial facilities and halls, etc.

3D Grade

  • Factory fitted, roof mounted grading system (Topcon)
  • Automated 6-way blade control
  • Modelling of complex 3D site models
  • Exact positioning of the blade relative to a target profile (terrain model)
  • Theft protection, no assembling or dismantling of the mast
  • Available pre-calibrated ex-factory
  • Support and service through your local Liebherr sales partner
  • Smart: Full integration into Construction Site 4.0

Applications:

  • Creating large grades and complex three-dimensional surfaces.
  • Suitable for medium to very large construction sites.
  • Used for road and railway construction, landscaping golf courses, constructing large industrial facilities, and in earthworks and landfill construction, etc.

Contact us!

Find your Liebherr contact partner

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You can withdraw given consents at any time with effect for the future and thus prevent the further transmission of your data by deselecting the respective service under “Miscellaneous services (optional)” in the settings (later also accessible via the “Privacy Settings” in the footer of our website).

For further information, please refer to our Data Protection Declaration and thr Google Privacy Policy.*Google Ireland Limited, Gordon House, Barrow Street, Dublin 4, Ireland; parent company: Google LLC, 1600 Amphitheatre Parkway, Mountain View, CA 94043, USA** Note: The data transfer to the USA associated with the data transmission to Google takes place on the basis of the European Commission’s adequacy decision of 10 July 2023 (EU-U.S. Data Privacy Framework).