Evaporative Emission Testing

Emissions from vehicles do not only come from the exhaust produced by the engine but also evaporate from the rest of the vehicle (mainly fuel systems).

AVL Approach

Emissions from vehicles do not only come from the exhaust produced by the engine but also evaporate from the rest of the vehicle (mainly fuel systems).


Benefits at a Glance

  • Fully automated and highly efficient operation, especially important due to the very long test procedures (over days)
  • Fully integrated worldwide emission legislation
  • Supports all R&D tasks and prepared for future challenges
  • Highest accuracy, robustness and quality

Technical Data

Supported engine types:

  • Spark Ignition (SI) engines, such as gasoline
  • HEV/PHEV

Supported fuel types:

  • Gasoline
  • Bio fuels and blends (such as Ethanol E100, E85, E25, E5...)

Supported emission legislations and regulations:

  • Europe
  • USA EPA
  • USA CARB
  • Japan regulations

Supported measurement tasks:

  • Stationary

System Scope

AVL EVAP automation system

The unique user interfaces makes both certification and R&D work easier. Users can easily use the system for different purposes with a minimum of training. For improved productivity, the AVL SHED is calibrated and made ready for use at any required time. All tests are automatically performed including additional functions such as leak test, flushing, loading, etc. Other key features include:

  • Compliance with the most advanced safety standard without the need of any specific adaptation 
  • Measurement and reports according to legislative requirements
  • Measurement results including reports and evaluation
  • Integration and automatic operation of AVL gas divider and AVL CFO checker
  • Connection to PUMA Open or ATLANT database with ASAM-ODS interface

AVL VT SHED - Variable Temperature Sealed Housing Evaporative Determination

Increasingly higher demands within the field of automotive emissions testing involve complete vehicle evaporative emissions analysis. A major part of the environmental hydrocarbon impact is caused by vehicle fuel evaporation, mainly via the fuel system of the vehicle. For certification and development tests, gas tight SHED chambers are needed, to be able to measure these emissions according to standard methods (e.g. Europe: EEC-norms, USA: EPA, CARB).

  • Evaporative emission test
  • Hot soak test
  • Diurnal evaporative emission test

Chambers are available in different sizes, from small component chambers up to full vehicle chambers.

AVL CANLOAD - Canister Loading Station

The activated carbon filter loading station aims to determine the working capacity of activated carbon canisters. Corresponding conditioning and fuelling cycles can be offered using loading rates between 15 g/h, 40 g/h up to 100 g/h. The system is an automatic system for the conditioning and targeted loading of activated carbon canisters, as they are used in vehicles to collect petrol vapour. The activated carbon filter loading station is available in two different versions:


AVL CANLOAD Single

  • Stream for individual Butane/N2 SHED
  • Conditioning

AVL CANLOAD Multi

  • N-streams for individual Butane/N2 tests
  • N-streams for individual Fuel-vapour/N2 tests
  • Conditioning