A Simulation Study for Hybrid Electric Vehicles with Gasoline Compression Ignition Technology 2019-01-2218
Strict pollutants regulations, real driving emissions compliance and CO2 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 CO2 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 CO2 vs. pollutants criteria. The concept is known worldwide as Gasoline Compression Ignition (GCI).
Very low vehicle out CO2 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® approach and Fuzzy Logic Toolbox™ in MATLAB® and Simulink® on different driving cycles.
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 CO2 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 CO2 like the target from European commission in 2030.