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Chassis Dynamometer (LDV)

Emission Test Bench

Tailor-made vehicle test benches that facilitate test systems subject to the purposes of various testing environments

Chassis dynamometer having world class control algorithms coupled with innovative mechanical designs and integration technology has been completely developed over the acquisition period by TeSys for Hofmann TeSys GmbH and Froude Hofmann chassis dynamometer product IP (Intellectual Property) from 2016 up to 2018.  

Now, TeSys can present a strong platform for the compete range of chassis dynamometer products contributable to Research and Development purpose with configurable versions for Battery Efficiency (PHEV, HEV, BEV), Emission, Performance/Endurance, Climatic, NVH testing facility and other bespoke applications to suit Military, Heavy/Medium/Light Duty vehicles as well as Motorcycle / AGV / ATV / 2-wheelers. Our chassis dynamometer has multiple solutions from a simple 1 wheel drive motorcycle to a fully independent 16x16 special commercial vehicle system applicable to conventional and e-drive vehicles.

TESYS - Dynamometer - Chassis Dynamometer (LDV) - Emission Test Bench



Emissions tests require repeatable extremely accurate dynamometers to allow the vehicle to be tested under accurately simulated road conditions, whilst in the emission laboratory.

TeSys' Chassis Dynamometer exceeds the demanding performance and accuracy criteria required by the SAE, US EPA directive, European WLTP & NEDC, FTP75 / SFTP (US06) / EUDC up to the latest testing requirements as standards.

The roller diameter size (48" LDV / 72" HDV ) of the dynamometer is variably supplied and optimized for exhaust gas testing methods that comply with regulations and laws related to PHEV/HEV.

These criteria include:

  • Accurate Road Load simulation to ensure the vehicle is tested under operational conditions
  • Fast, critically damped Inertia simulation response to provide realistic loading of the test vehicle powertrain
  • Accurate synchronization of multi roller systems to provide "through the road" type conditions
  • Effective parasitic loss compensation


Our Emissions chassis dynamometer provides an extremely accurate, repeatable and responsive electrical inertia simulation vehicle test system.

The chassis dynamometer utilizes either AC motor centrally mounted (Motor-In-middle) between the rolls or independent configuration that provides a compact, low maintenance design.

All components are mounted on a single substantial steel under frame 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.
Emission chassis dynamometer solutions are also available for PHEV/HEV, truck, and motorcycle applications.

Main Features of our Emissions chassis dynamometers:

  • 48" roll with either independent or center-mounted (MIM) AC motor
  • Compliant with EPA, EURO III, IV, V, VI, and VIII legislative emissions test requirements
  • High accuracy and repeatability with fast response inertia simulation
  • Clean power 4-Quadrant 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 Beckhoff I/O & EtherCAT hardware platform
  • Automated dynamometer performance testing routines
  • Above floor or secondary loadcell calibration
  • 4x2 and 4x4 configurations
  • 4x4 independent systems for PHEV/HEV or ICE Vehicle testing
  • Robust design for long and trouble-free operational life
  • Low maintenance and life cycle 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

Standard Features & Optionals

  • Robot driver (Integrated or Stand-Alone Robot driver)
  • Road Load Simulation (F0, F1, F2)
  • v-Driver (Virtual Simulator)
  • 2WD, 4WD or 4x4 Independent configurations
  • 2WD upgradeable to 4WD
  • High speed version up to 300 km/h (by utilizing TeSys Patent PM Motor)
  • Multiple increased power/tractive force options (236kW-384kW/10,000N-15,000N Nominal)
  • Climatic (typically -40°C to +60°C) design with climatically exposed or insulated pit options
  • Driver’s Aid monitor or laptop
  • Automatic "vehicle centralizing and lifting" 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 up to EURO 7 compatible
  • Drivers handset
  • Various standards including UL, BV, and CNOMO



Do you have any questions?

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