The “Dieselgate” crisis has prompted the authorities to change the paradigm for the assessment of polluting emissions from internal combustion vehicles with a view to their approval. The vehicles, hitherto tested on very specific cycles on chassis dynamometers, have since 2015, with the entry into force of the Euro 6 standard (often called RDE: Real Driving Emissions), been confronted with an assessment of polluting emissions in actual traffic conditions. More specifically, pollutants are measured on open roads using portable PEMS (Portable Emission Measurement System) devices.
This represents a great challenge for car manufacturers who must control the performance of their powertrain on any compatible RDE cycle. These cycles offer a very wide variety of driving situations but they are paradoxically difficult to build in practice because they must respect a list of constraints defined by the standard (proportion of road/city/motorway, acceleration, elevation, duration and frequency of stops , etc.).
OSE has developed OSEroad, an automatic RDE cycle generator.