Abstract
The goal of this paper is to analyse the collected data on energy efficiency of electric vehicles from researches done by other authors and also to summarise all the factors affecting it. The majority of data available are obtained through simulations – therefore the emphasis in this paper will be placed on experimentally acquired data. The results of the analysis will be used for the planned e-bus eco-driving project for the purpose of Belgrade’s public transportation system. Currently there are only 5 (ultracapacitor type) e-buses operating in Belgrade city public transport, which makes only 0.2 % of all vehicles in rolling stock (making 16 % together with other electric-powered vehicles – trams and trolleybuses), but there are plans to acquire new 80 electric buses. With the rise of the number of electric vehicles, appropriate training of drivers is gaining more and more importance, and the results of the presented analysis make the basis for such training. This will hopefully increase the range of the buses used and help save the energy spent by public transportation, thus giving a little contribution to global fight for cleaner planet.
Highlights
By looking at Tab. 1, it can be seen that currently there are only 5 electric buses operating in Belgrade public transportation system, with 80 new e-buses planned
The results showed that electric vehicles are more efficient in urban driving conditions than
The research conducted in laboratory conditions on 3 different electric vehicles tested in few driving cycles in accordance with SAE J1634 showed that autonomy at –7 °C is reduced by approximately 20 % in comparison with 20 °C, with cabin heater reducing it for additional 25 %
Summary
By looking at Tab. 1, it can be seen that currently there are only 5 electric (ultracapacitor type) buses operating in Belgrade public transportation system, with 80 new e-buses planned. It is expected that this trend will continue [1], so it is very important to take all the advantages of electric buses usage. In order to make it possible, a new ecodriving project is planned. As a preparation for this project, a research on energy efficiency of electric buses needs to be conducted. There are many factors affecting it [2], and this paper will try to summarise them.
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