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AVL ROADSIM EMC CAR™ Chassis Dynamometer

The AVL ROADSIM EMC CAR™ Chassis Dynamometer it is designed for cars in applications like EMC analysis.

AVL Approach

The cradle mounted DC motors are arranged beside the rollers. The whole chassis dynamometer can be rotated to align the vehicle, for example, the electromagnetic field. The road load simulation uses the mechanical base inertia together with electrical inertia simulation.

Benefits at a Glance

  • Extreme low electromagnetic emissions chassis dynamometer
  • Reliable EMC optimized components ensure immunity to interference
  • Proven record of numerous installations worldwide (more than 25 years experience)
  • Excellent working relationship with all major chamber suppliers
  • Local service capability with short response time

Technical Data

The following specification shows typical values and is subject to change. Alternative technical configurations are available upon request.



Nominal tractive force in motor mode (per roller)

4,277N @ v≤90km/h

Nominal power in motor mode (per roller)

108kW @ v≥90km/h

Max. speed




Roller diameter


Distance between outer roller edges


Distance between inner roller edges


Wheel base

1,400mm … 3,800mm

Axle load


Max. axle load


Measurement accuracy data


Tolerance of tractive force measurement

±0.2% of full scale

Tolerance of speed measurement


Control accuracy data


Tolerance of tractive force control

±0.22% of full scale

Tolerance of speed control


Road load simulation


Tolerance of inertia and road load simulation

±1% of calculated value (but not better than force control)


Measuring Princilple

Tractive force
The tractive force is measured by a strain gauge sensor supporting the cradle mounted motor.

The speed is measured by an incremental encoder with two 90° shifted tracks with detection of the direction of rotation.