AVL ROADSIM NVH 4x4 LIGHT TRUCK™ Chassis Dynamometer - Development
AVL ROADSIM NVH 4x4 LIGHT TRUCK™ Chassis Dynamometer
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.
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Performance |
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Nominal tractive force in motor mode (per roller) |
4,054N @ v≤120km/h |
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Nominal power in motor mode (per roller) |
135kW @ v≥120km/h |
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Max. speed |
270km/h |
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Dimensions |
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Roller diameter |
1,910mm |
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Distance between outer roller edges |
2,300mm |
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Distance between inner roller edges |
900mm |
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Wheel base |
2,200mm … 4,200mm |
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Axle load |
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Max. axle load |
3,000kg |
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Inertia simulation range |
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Inertia simulation range (2WD) |
450kg … 5,400kg |
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Inertia simulation range (4WD) |
800kg … 5,400kg |
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Measurement accuracy data |
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Tolerance of tractive force measurement |
±0.15% of full scale |
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Tolerance of speed measurement |
±0.02km/h |
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Control accuracy data |
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Tolerance of tractive force control |
±0.2% of full scale |
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Tolerance of speed control |
±0.03km/h |
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Road load simulation |
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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.
Speed
The speed is measured by an incremental encoder with two 90° shifted tracks with detection of the direction of rotation.