An evaluation study on the use of an auxiliary electric powertrain in conventional vehicles: improvements in fuel consumption and acceleration performance.
Diego Moreno Bravo1; Pablo Siqueira Meirelles1
1 Universidade Estadual de Campinas
doi:10.20906/CPS/COB-2015-0926
Resumo
Amid growing concern over greenhouse gas emissions and the quest for improved energy efficiency in the transportation sector, hybrid and electric vehicles (HEVs) have emerged. Such technology is already a reality in the global automotive market and has increased, year after year, its share of contribution in the sales of great automakers. However, in Brazil, this technology is not as present as it is in other countries such as France, Japan and United States of America, just to mention a few examples. The main reasons pointed out by specialists are the high taxes applied on HEVs and their components by the Brazilian government, the lack of incentive policies and technological limitations. Therefore, there is a gap to be filled in this area in Brazil. An alternative is the development and/or integration of national components that can be installed in a conventional car through a process named "hybridization". This paper evaluates the effects of the installation of an off-the-shelf electric motor whose energy is provided by a small capacity battery pack. The control strategy is designed to be as simple as possible and uses a heuristic approach. All this was thought in order to minimize the processing power required by the devices that will control this new system, reading the signals from other parts that are present in the car, processing the implemented strategy and sending the desired command signals to the electric powertrain components. In order to quantify the gains or eventual losses of this proposal, the authors have used two softwares, in co-simulation, to build the computational model of the vehicle analyzed. The main software was LMS Imagine.Lab AMESim (Advanced Modeling Environment for Simulations) in which most components were modeled and the driving cycles, driver and longitudinal dynamics equations were implemented. The second software, which was used simultaneously with AMESim and where the control strategy was implemented using a C-code, was Matlab/Simulink. The co-simulation was made using the S
Palavras-chave: hybrid powertrain; fuel consumption; acceleration performance; powertrain efficiency; heuristic strategy; regenerative braking; hybridization