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The outputs of this project will create impact by enabling stakeholders who depend on fuel consumption measurements in the road transport and maritime sectors, such as vehicle manufacturers, freight forwarders, ship owners, and regulatory authorities, to have access to reliable fuel consumption data.

One key project output will be advanced calibration capabilities. These will generate impact by enabling flow meter performance to be assessed under the dynamic flows that are associated with test cycles such as the World Harmonized Stationary Cycle (WHSC) or the World Harmonized Transient Cycle (WHTC). The project’s associated technical guide and the design for a secondary test rig, which will be capable of generating dynamic loads, will help to facilitate practical take-up. In addition, efforts towards downsizing vehicle engines will be supported by the project’s improved fuel consumption measurements.

By providing a fuel property matrix of alternative and synthetic fuels, companies will be supported in their endeavours to develop engines which work efficiently with alternative or synthetic fuels. The provision of a validated numerical tool for investigating the interaction between test liquid and flow meter performance will enable companies to replace experimental setups with simulations with known uncertainties, in particular in the case where experimental conditions are costly or dangerous to realize. Likewise, the provision of two well‑characterized synthetic test liquids for use as substitute fuels for flow meter characterizations will support the work of companies that are active in the development of drive systems and testing technology.The project’s technical guides for the comprehensive uncertainty assessment of the flow meters that are used for the fuel consumption measurement of cars and trucks and in the maritime sector will create impact by helping manufacturers of these devices to supply their customers with more reliable information about the performance quality of their products. The project’s outputs will also help to create impact by paving the way towards a realistic uncertainty determination for fuel consumption measurements.

The project will contribute to improving the measurement capabilities of the fuel transport properties under operating conditions through its advancement of in-line measurements of the density and viscosity of alternative and synthetic fuels, by developing a sophisticated system combining standardised calibration procedures. This will in turn support an improved fuel consumption determination as the flow meter performance for the real-time transport properties will be taken into consideration in the flow measurement.

To foster the take up of the project’s findings by a wider community in flow metrology from NMIs/DIs, industry and academia, all outputs with direct links to flow measurements and measurement quality will be compiled in a PTB-Report, which will be made freely available to end users via the project’s website.