The 4WD-Acoustic-Chassis-Dynamometer covers a wide range of different vehicles: From passenger cars and vans to mobile work machines, Sven the largest vehicles can enter the test bench through the hinged doors and be examined. Thanks to the four individually driven rollers, almost all conceivable scenarios can be realized: performance measurements, functional tests, dynamic tests, efficiency/fuel consumption, driving and work cycles, assistance systems, acoustics/NVH and much more.

The test bench has a variety of function modes such as tractive force and speed control, road simulation or the integration of individual simulations, for example via IPG CarMaker/TruckMaker. Thanks to the four individually controllable rollers, differential speeds/torques between the wheels and axles are also possible. A pull-down device allows variable loading of the axles to simulate additional loads.

The test stand is supplemented by extensive measurement technology as well as operation in combination with a driving robot and a PTO brake to display work cycles.

Application examples

• Power and tensile force measurements
  • 1200 kW tractive power and 300 kN tractive force
  • 500 kW PTO power (PTO) - max. 6600 Nm, max. 2500 min-1
  • Combined and dynamic loading of travel drive and PTO shaft
• Consumption and efficiency measurements
  • Fuel measurements
  • Creation of efficiency maps
  • Range testing of hybrid and electric vehicles
• Road simulation with load adjustment, coastdown tests
• Driving resistance simulation uphill/downhill, trailers, attachments
• Simulation of additional vertical loads using a pull-down device up to 20 t (10 t per axle)
• Representation of complex cycles and profiles through time/path specification or simulation, e.g. IPG CarMaker/TruckMaker
• Exhaust emission tests with external PEMS measurement technology
• Tests under hot conditions with IR/sun simulation to test the cooling systems

Measurement technology

• Measurement of: Tractive forces, torques, accelerations, speeds, roller paths
• Temperature measurement technology
• Hydraulic pressures (up to 600 bar available) and volume flows (up to 800 l/min available)
• Data bus recording: CAN, J1939, Isobus, Ethernet
• Acoustic measurement technology
• Universal connection of further analog and digital measured variables