Experimental evaluation of VECTO hybrid electric truck simulations

New heavy-duty vehicles are simulated with the Vehicle Energy Consumption Calculation Tool (VECTO) to certify their fuel consumption and CO2 emissions in the European Union. VECTO is planned to be utilized also for the certification of vehicles with hybrid electric powertrains, in all topological configurations spanning from P0 to P4 parallel systems as well as series hybrids. A development version of VECTO able to simulate these configurations is already available and was used for this study. In this work we have collected available measurement data from a specific P2 hybrid lorry which was tested on the dyno as well as on the road and a vehicle model was created in VECTO. The VECTO Hybrid Controller was evaluated by comparing the measured and simulated decisions on utilizing the available power sources (fuel/stored electric energy), on regenerative braking and on gear shifting. The results are analysed on a step by step basis as well as on a cycle average CO2 emissions basis and show a good fit of up to 5% between the measured and the simulated values.