In Vehicle Test
With increasing development focus on the evolution of new energy sources and powertrains; Froude Hofmann are actively supplying innovative solutions to this demanding test application:
4x4 "all independent" chassis dynamometers - for Hybrid and fuel cell vehicle development.
The unique roll synchronisation control capability of these chassis dynamometers enables various powertrain configurations to be tested in accurately simulated road and operational conditions. This configuration provides a highly flexible test system with 4 individual motor-roll assemblies, whereby all 4 wheels of the vehicle are effectively under independent control. In normal operation all 4 rolls are accurately synchronised to present a "through the road" simulated condition to the test vehicle's powertrain.
Under these conditions the energy flow management strategies of the vehicle will function correctly, and the test will, therefore, be representative. With this highly flexible Chassis Dynamometer, various test applications can be realised on one system including:
- Powertrain testing of innovative driveline configurations, including Hybrid and Kinetic Energy recovery systems - enabling complex energy flow strategy developments,
- ABS brake and TCS traction control system testing
- Corner simulation for differential and driveline testing.
- Vehicle collision avoidance systems - operational testing
Our 48" Chassis Dynamometer provides solutions for in-vehicle powertrain testing, both for conventional, hybrid or electric vehicle applications. Our solution provides an extremely accurate, repeatable and responsive electrical inertia simulation vehicle test system. The chassis dynamometer utilises an AC motor centrally mounted between the rolls that provides a compact, low maintenance design. All components are mounted on a single substantial steel underframe providing rigidity, low vibration and ease of installation.
The chassis dynamometer control system includes several automated routines to test and validate all the main performance criteria. Our chassis dynamometer solutions are also available for truck and motorcycle applications
Main Features of our Emissions Chassis dynamometers:
- 48" roll with centre-mounted AC motor
- Compliant with EPA, EURO III, IV and V legislative emissions test requirements
- High accuracy and repeatability with fast response inertia simulation
- Clean power IGBT AC drive technology
- Thermally stabilized load measurement system
- Twin encoders for increased accuracy
- Real time control processor and separate Graphical User interface PC using distributed I/O hardware platform
- Automated dynamometer performance testing routines
- Above floor loadcell calibration
- 4x2 and 4x4 configurations
- 4x4 independent systems for Hybrid Vehicle testing
- Robust design for long and trouble-free operational life
- Low maintenance and lifecycle costs
A Robot driver is also available to complement this Chassis dynamometer to assist with repeatable results.
- Vehicle exhaust emissions testing
- Fuel economy testing
- Climatic and environmental testing
- Vehicle road load simulation for customer test requirements
- Performance Testing
- NVH Testing
- Endurance Testing
| Roll diameter | 1.219m (48 inches) |
| Roll width | 914.4mm |
| Roll spacing | 914.4mm |
| Inertia simulation range | 454-5450 kg |
| Maximum axle road | 4500 kg |
| Power (continuous rating) | From 150 kW (90-200 km/h) |
| Force at roller surface (continuous rating) | From 6000 N (0-90 km/h) |
| Intermittent power | 150% for 30 seconds every 30 minutes |
| Maximium Speed | 200 km/h |
| Dynamometer Enviroment | -10°C to +40°C |
- vDriver
- Robot Driver
- 2WD, 4WD or 4x4 Independent configurations
- 2WD upgradeable to 4WD
- High speed version up to 300 km/h
- Increased power/force options (240kW/10,000N)
- Climatic (typically -40°C to +60°C) design with climatically exposed or insulated pit options
- Integrated or stand-alone robot driver
- Drivers-aid laptop/PC
- Automatic 'vehicle centring and lift' systems
- Automated wheel guards/roll covers
- AK or ASAM communication links to test-cell host or emission gas analysis equipment
- Test facility host computer system
- Data acquisition with powerful graphical presentation and analysis package
- Vehicle cooling fan
- Drivers handset
- Various standards including UL, BV, and CNOMO
- Facilities planning and installation services
- Comprehensive in-house and/or on-site training courses
- Tailored preventaive mainenance contracts
- On-line diagnistics and support via modem or VPN
- Technical Helpline Support
