Rule-based Power Management Strategy of Electric-Hydraulic Hybrid Vehicles: Case Study of A Class 8 Heavy-Duty Truck
2022-01-0901
03/29/2022
- Event
- Content
- Mobility in the automotive and transportation sector has been experiencing a period of unprecedented evolution. A growing need for efficient, clean and safe mobility has made a strong momentum toward sustainable technologies in this sector. Toward this end, battery electric vehicles have drawn keen interest and the market share is expected to grow significantly in the coming years, especially in light-duty applications such as passenger cars. Although battery electric vehicles feature high performance and zero emissions characteristics, economic and technical issues such as high battery cost, a short driving range, and limited infrastructure should be tackled. In particular, the low power density of battery electric vehicles limits their broad adoption in heavy-duty applications such as class 8 long haul trucks due to a size and weight of battery. In this work, motivated by the high power density and potential for improving energy efficiency through regenerative braking of a hydraulic pump and accumulator, electric-hydraulic hybrid vehicles, to be specific, for class 8 heavy-duty truck having a significant amount of kinetic energy, are considered to address the aforementioned issues. The simulation model including an electric motor/generator, lithium-ion battery, hydraulic pump/motor, and hydraulic accumulator are developed. Using the simulation model, the rule-based power management strategy is developed and assessed with different driving cycles. The simulation results show that electric-hydraulic hybrid vehicles can improve overall energy efficiency by operation of an electric motor at optimal conditions and efficient regenerative braking during deceleration. Less consumption of battery energy allows to reduce a size of battery while a driving range with a full charge is maintained or extended.
- Citation
- Yoon, Y., Romero, G., Nkemdilim-Dantzler, E., DelVescovo, D. et al., "Rule-based Power Management Strategy of Electric-Hydraulic Hybrid Vehicles: Case Study of A Class 8 Heavy-Duty Truck," SAE Technical Paper 2022-01-0901, 2022, .