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Innovative testing equipment for agricultural machinery and commercial vehicles

DLG chassis dynamometer

The DLG operates the world’s largest and highest-capacity rolling testbed for measuring performance, emissions and consumption rates on farm machines and commercial vehicles. This testbed features high-end measuring technology that offers the highest level of functionality, flexibility and precision. The focus of our work is on consumption and performance tests of tractors, self-propelled machines and trucks. This service is complemented by fuel and lubricant tests that measure the performance and saving potential of the specific product.

The test measures all fuels filled into the machine and all outputs to the wheels, the PTO and hydraulic couplers as well as the exhaust emissions. It is also possible to measure the electric consumption and efficiency chain of electric and hybrid vehicles. We also compare fuels and lubricants of various specifications.

 

The DLG rolling testbed – stand-out features and specifications

  • Determination of the power on the wheels under full load and in a driving speed range from 0 to 105 km/h forward and reverse
    Performance measurements:
    • Wheel power (up to 700 kW)
    • Power take-off power (up to 700 kW) using a separate load unit
    • Hydraulic power of up to 150 kW by using a separate load unit
  • Simultaneous load at the driveline, power-take-off and the hydraulic system
  • Either synchronous running of the rollers or the wheels
  • Influence of the ballasting concept on driveline efficiency
    (e.g. traction force distribution, wheel slip)
  • Fuel consumption
  • Reagent/AdBlue consumption
  • Exhaust emissions are measured by PEMS (Portable Emission Measurement System)
  • Comparative measurements of performance and consumption using different fuels or lubricants at a consistent room temperature
  • Range determination of electric and hybrid vehicles
  • Power consumption tests on electric or hybrid vehicles
  • Temperature measurement: 8 standard channels, more channels on request
  • Engine speed measurement: 4 standard channels
  • CAN data recording: J1939, Isobus
  • Driving simulation, driving cycles, driving profiles according to customer specifications
  • Coastdown tests, load adjustment
  • Trailer load simulation
  • Cooling package testing
  • Acceptance tests of engines and gearboxes
  • Simulation of uphill and downhill runs
  • Endurance brake testing (to German road traffic regulations, UN-ECE regulations or EU directives)
  • Simulation of load conditions, up to 10 tons pull-down per axle
  • Vehicle dimensions and weights
    • Wheelbase: 2,050 – 6,000 mm
    • Max. vehicle width: 4,500 mm
    • Max. wheel load: 15 t
    • Max. total vehicle mass: 60 t
  • Driveline load unit
    • Max. performance: 700 kW
    • Max. force: 135 kN/roll
    • Speed range: ± 105 km/h
    • Engine driven and generator driven
    • Roller diameter: 2,000 mm
    • Direct drive per roller
    • Supports tandem axles
  • Power take-off load unit
    • Asynchronous motor
    • Max. output: 700 kW
    • Max. torque:
      (left/right hand rotation): 7,000 Nm
    • Engine driven and generator driven
  • Hydraulic load unit
    • Load applied by a combination of hydraulic and asynchronous motors
    • Max. power applied: 150 kW
    • Max. flow: 500 l/min.
    • Max. pressure: 300 bar
  • Air conditioning
    • Standard temperature: 25 ± 2 °C
    • Supported temperature range: 15 - 45 °C
    • Air flow velocity: 10 or 20 km/h
    • Face area: 3,000 x 3,000 mm
  • Measurement equipment
    • Fuel consumption
    • AdBlue/reagent consumption
    • Gaseous exhaust emission incl. mass flow

The DLG Test Center is accredited to the ISO 17025 standard and is appointed by the Federal Motor Transport Authority (KBA) to conduct homologation and approval tests of vehicles and vehicle parts. For further information please click ‘Download’ to download PDF documents.

Contact

DLG Test Center Technology and Farm Inputs • Max-Eyth-Weg 1 • 64823 Groß-Umstadt • Tel: +49(0)69/24 788-600 Fax: +49(0)69/24 788-690 • tech@DLG.org