ANALYSIS OF HYDRAULIC BRAKING ENERGY RECOVERY SYSTEM OF PARALLEL HYBRID ELECTRIC VEHICLE BASED ON COMPOSITE MATERIALS.

The purpose of this study is to analyze the hydraulic compound power system and energy system of parallel hydraulic hybrid electric vehicle and discuss its advantages in vehicle braking and energy recovery. In this research, the hydraulic hybrid power system of the power vehicle was summarized, the internal combustion engine, secondary components, clutch and accumulator in the system were described, and the mathematical model was established according to the characteristics. In addition, the braking energy feedback principle of hybrid electric vehicle was introduced, which lay a foundation for the analysis of energy recovery strategy. The results showed that when the vehicle was braking, the hydraulic regenerative braking system was recovered the energy and the pressure of accumulator was increased. When the car was started, it was driven by the hydraulic regenerative braking system, and the pressure of the accumulator was reduced. Therefore, electric vehicles can fully recover the energy consumed by traditional vehicles during braking by adding the hydraulic regenerative braking system, and store the energy in the hydraulic accumulator. When the car was started or accelerated, the stored energy was released to save energy and reduce carbon emissions, so that the efficiency of energy and heat utilization was significantly improved, and the endurance was enhanced. [ABSTRACT FROM AUTHOR]