A Simulation Study for Hybrid Electric Vehicles with Gasoline Compression Ignition Technology

Abstract

<div class="section abstract"><div class="htmlview paragraph">Strict pollutants regulations, real driving emissions compliance and CO<sub>2</sub> reduction mandates are stretching the boundaries of traditional internal combustion engine (ICE) development. Despite major improvements in the last decade, car manufacturers still face challenges in simultaneous abatement of CO<sub>2</sub> and local emissions of conventional diesel compression ignition and gasoline spark ignition powertrains. By combining a clean fuel like gasoline with a high efficiency thermodynamic cycle (compression ignition) it is possible to create a powertrain that is clean both globally and locally, and so breaking the historical trade-off between decreasing CO<sub>2</sub> vs. pollutants criteria. The concept is known worldwide as Gasoline Compression Ignition (GCI).</div><div class="htmlview paragraph">Very low vehicle out CO<sub>2</sub> cannot be achieved if ICEs are not combined with a hybrid electric powertrain. Saudi Aramco also looks into the possibility of combining GCI with hybrid electric technologies. A 0D simulation of powertrain was performed using the Stateflow<sup>®</sup> approach and Fuzzy Logic Toolbox™ in MATLAB<sup>®</sup> and Simulink<sup>®</sup> on different driving cycles.</div><div class="htmlview paragraph">The purpose of this paper is to design the control strategies for different hybrid architectures based on certain parameters such as speed and torque, power demand and battery. Optimizing these parameters helped to achieve some significant results. So four hybrid architectures with variable battery sizes were optimized and simulated to prove the possibilities of CO<sub>2</sub> benefits. The simulation results showed that a C-class vehicle equipped with a GCI engine and different hybrid powertrains can emit under 64g/km of CO<sub>2</sub> like the target from European commission in 2030.</div></div>