How accurately can we measure vehicle fuel consumption in real world operation?

European regulations for both light-duty (LDV) and heavy-duty vehicles (HDVs) require from 2021 the monitoring of in-use fuel consumption using on-board monitoring (OBFCM) devices. For LDVs, the accuracy to measure fuel consumed is set by regulation to ±5%, while for HDVs no requirements exist so far. In this study, OBFCM data from 15 LDVs and 12 HDVs are measured in lab and on-road. Results indicate that the FC measured by the OBFCM, for the majority of the vehicles, satisfies the accuracy requirements of ±5% over complete WLTP tests or complete on-road trips. Also, for most of the vehicles the OBD distance can be measured with an accuracy of ±1.5% on-road when Global Positioning System (GPS) distance is used as a reference. The results of this study could be used to further support the standardization of OBFCM accuracy in vehicles, and the setup of the EU real-world CO2 emissions monitoring approach.

PAVLOVIC Jelica;  FONTARAS Georgios;  BROEKAERT Stijn;  CIUFFO Biagio;  KTISTAKIS Markos;  GRIGORATOS Theodoros; 

2021-02-04

PERGAMON-ELSEVIER SCIENCE LTD

JRC122028

1361-9209 (online),   

https://www.sciencedirect.com/science/article/pii/S1361920920308518?via%3Dihub#s0140,    https://publications.jrc.ec.europa.eu/repository/handle/JRC122028,   

10.1016/j.trd.2020.102666 (online),