AVL ROADSIM NVH 4x4 LIGHT TRUCK™ Chassis Dynamometer - Development

AVL ROADSIM NVH 4x4 LIGHT TRUCK™ Chassis Dynamometer

It is designed for testing cars and light commercial vehicles in applications like NVH analysis.

AVL Approach

The cradle mounted AC motors are arranged beside the roller sets. Acoustic treatments like hydraulic bearing, enclosures, etc. reduce the acoustic emissions. The road load simulation uses the mechanical base inertia together with electrical inertia simulation.

Benefits at a Glance

Extreme low noise characteristic (hydraulic bearings, acoustic insulation, etc.)
Proven record of numerous installations worldwide
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.

Performance
Nominal tractive force in motor mode (per roller)	4,054N @ v≤120km/h
Nominal power in motor mode (per roller)	135kW @ v≥120km/h
Max. speed	270km/h
Dimensions
Roller diameter	1,910mm
Distance between outer roller edges	2,300mm
Distance between inner roller edges	900mm
Wheel base	2,200mm … 4,200mm
Axle load
Max. axle load	3,000kg
Inertia simulation range
Inertia simulation range (2WD)	450kg … 5,400kg
Inertia simulation range (4WD)	800kg … 5,400kg
Measurement accuracy data
Tolerance of tractive force measurement	±0.15% of full scale
Tolerance of speed measurement	±0.02km/h
Control accuracy data
Tolerance of tractive force control	±0.2% of full scale
Tolerance of speed control	±0.03km/h
Road load simulation
Tolerance of inertia and road load simulation	±1% of calculated value (but not better than force control)

Measuring Principle

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