real driving emissions Reducing Emissions in Real Driving In future, vehicle manufacturers will have to demonstrate compliance with emission standards under real-world driving conditions. This calls for not only a new kind of engine and vehicle development methodology, but also a new generation of portable measuring equipment. AVL can offer its customers both. 2 4 F o c u s From 2017 onward, exhaust emission characteristics will be assessed in real-world driving – both for initial type approval and later on during operation (in-service conformity). According to Michael Weißbäck, Deputy Vice President Powertrain Systems Passenger Cars, the new regulations – currently being prepared and and being introduced from 2017 onwards, complementary to the WLTP cycle – will entail some significant changes in engine and vehicle development: “To comply with the emission limits in real driving conditions, the vehicle’s entire operating range needs to be optimized in view of emissions, while always keeping in mind the interaction between engine, exhaust gas aftertreatment and powertrain. Up until now, the focus was on optimization within the statutory cycles which cover a very clearly defined window of the map.“ New model-based development approach While emission optimization was previously limited to a closely defined driving cycle (such as the NEDC, for example), the engineers are now faced with totally new challenges. The previously applied development methodology has a practical limitation when used to analyze real-world driving emissions. To cover such a considerably expanded scope, it would take a disproportionately great number of test runs if it is based on fully factorial consideration of all eventualities. For reasons of time and expense, however, this is obviously not possible. “This is why we at AVL have developed a new model based approach. Based on empirical/physical models – for > With its mobile testing platform M.O.V.E, AVL provides a portfolio of measuring devices that allows its customers to run all the required measurements inside the vehicle.
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