sizing is counterproductive when it comes to RDE, because emissions verification under real-world driving conditions means that we have to move away from downsizing toward rightsizing. AVL noticed this early on and is now demonstrating how to achieve a better overall package from the tradeoff between fuel consumption and RDE emissions. AVL has already presented some advanced rightsizing solutions in connection with hybrid technologies and electric supercharging,” the expert said. INNOVATIVE DEVELOPMENT APPROACHES With RDE test reproducibility alone already being an obstacle in itself, the achievement of the RDE targets requires development approaches that cover the whole range of RDE. AVL’s solution: The measuring results are brought back to the development environment by using AVL M.O.V.E iS to record data like road profile, climatic conditions, driving style, etc. The recorded results are then re-simulated in the test facility or, more specifically, transferred to the model-based simulation environment. This makes the tests reproducible, and existing simulation models can even be improved. “We’ve been offering sophisticated RDE technologies for some time now, which were tried out on test vehicles. Careful attention was also paid to the cost aspect. With our concept of rightsizing we were additionally able to show that RDE considerations do not start on the road but much earlier on, with the development of a drive system concept,” Roland Wanker concluded. < F O C U S 3 1 And that’s not all. Shifting the testing environment to the road also means that the reproducibility of the emission tests is no longer fully ensured. There are far too many factors that require consideration: temperature, altitude, road profile, driving style, which may be anything from moderate to sporty, to mention but a few. In light of these circumstances, conventional development methods require a new approach to emission compliance verification. FORESIGHT FORMS THE BASIS FOR INNOVATIVE METHODOLOGY “AVL is certainly a pioneer in this field. The company started to address the issue of RDE many years ago after recognizing its relevance for the future – long before there were any detailed plans for the legislation,” Roland Wanker, Global Business Segment Manager, Vehicle Testing Systems said, adding: “AVL’s extensive experience in the area of emission verification in commercial vehicles led to the development of the innovative all-in-one RDE solution AVL M.O.V.E iS. It will allow OEMs to meet the RDE challenges in Europe and worldwide.” Apart from that, AVL has brought together a variety of virtual calibration methods and tools in a one-stop solution, enabling emission optimizations in very early development pha- ses. Michael Weißbäck: “Expertise and know-how has additionally been developed for base engine design, aftertreatment and hybridization – all of which is incorporated into a single system.” RIGHTSIZING, NOT DOWNSIZING As far as engine downsizing is concerned, RDE will slow down this trend. This is because emissions control under different driving conditions have to be brought in line with CO2 optimization. Michael Weißbäck: “Extreme down- > The AVL M.O.V.E Exhaust Flow Meter (EFM). > The AVL M.O.V.E.EFM Control Box with EFM Tube and Extensions.
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