Development of an Efficient Thermal / Elecric Skipping control Strategy applied to a parallel P3 hybrid electric vehicle
2022-01-0899
03/29/2022
- Event
- Content
- In recent years automobile manufacturer focused towards an increasing degree of electrification of the powertrains with the aim to reduce pollutants emissions and fuel economy. In the face of more complex design processes and control strategies, these powertrains offer an improved fuel exploitation compared to conventional vehicles thanks to an intelligent energy management along the driving mission. A simulation study is here presented aiming at developing a control strategy for a hybrid electric vehicle (HEV). The strategy is here applied to the control of the parallel P3 powertrain. The simulation model is implemented using vehicle modeling and simulation toolboxes in MATLAB/Simulink. The model includes thermal engine, electric motor, battery pack and DC-DC converter. A map-based approach is used to model thermal engine and electric motor, while a zeroth equivalent circuit model is used to represent the battery pack. The proposed control strategy is based on an alternative utilization of the electric motor and thermal engine to satisfy the vehicle power demand at the wheels (Efficient Thermal/Electric Skipping Strategy - ETESS). At each time, the choice between the two units is realized through a comparison between two equivalent fuel rates, one related to the actual thermal engine fuel consumption and the other related to the electric power consumption. The ETESS is applied to estimate fuel consumption and emissions along different driving cycles, such as WLTC, FTP75, NEDC and ARTEMIS. The control algorithm is implemented on a dedicated microcontroller (STM32-NUCLEO-H743ZI2) performing a processor-in-the-loop simulation (PIL). In order to demonstrate the reliability and effectiveness of the ETESS, the Equivalent Consumption Minimization Strategy (ECMS) and Pontryagin Minimum Principle (PMP) are taken as references. The PIL results are compared showing that the proposed strategy ensures a similar fuel economy (higher of about 2% on average) and a computational effort reduced by 99% on average. This last feature reveals the potential for real time on-vehicle applications.
- Citation
- De Bellis, V., Piras, M., and Malfi, E., "Development of an Efficient Thermal / Elecric Skipping control Strategy applied to a parallel P3 hybrid electric vehicle," SAE Technical Paper 2022-01-0899, 2022, .