Abstract
The braking energy can be recovered and recycled by the regenerative braking system, which is significant to improve economics and environmental effect of the hydraulic hybrid vehicle. Influencing factors for the energy recovery rate of regenerative braking system in hydraulic hybrid vehicle were investigated in this study. Based on the theoretical analysis of accumulator and energy recovery rate, modeling of the regenerative braking system and its energy management strategy was conducted in the simulation platform of LMS Imagine Lab AMESim. The simulation results indicated that the influencing factors included braking intensity, initial pressure of the accumulator, and initial braking speed, and the optimal energy recovery rate of 87.61% was achieved when the parameters were 0.4, 19 MPa, and 300 rpm, respectively. Experimental bench was constructed and a series of experiments on energy recovery rate with different parameters were conducted, which aimed to validate the simulation results. It could be found, that with the optimal parameters obtained in the simulation process, the actual energy recovery rate achieved in the experiment was 83.33%, which was almost consistent with the simulation result. The obtained high energy recovery rate would promote the application of regenerative braking system in the hydraulic hybrid vehicle.
Highlights
The braking energy can be recovered and recycled by the regenerative braking system in the hybrid vehicle, which was propitious to save energy, reduce the emission of polluting gases, and protect the environment [1,2]
The initial pressure of the accumulator ranged from 19 MPa to 22 MPa at the interval of 1 MPa when the braking intensity was kept at 0.4 and the initial braking speed was set at 300 rpm
(1) The adjustable influencing factors for energy recovery rate of the regenerative braking system in the hydraulic hybrid vehicle, which included braking intensity, initial pressure of the accumulator, and initial braking speed, were theoretical analyzed, analog simulated, and experimental validated in this research
Summary
The braking energy can be recovered and recycled by the regenerative braking system in the hybrid vehicle, which was propitious to save energy, reduce the emission of polluting gases, and protect the environment [1,2]. Research targets of these studies were not the hydraulic hybrid vehicle, the used methods in theory, in simulation, and in experiment provided helpful references for investigation on influencing factors for the energy recovery rate of regenerative braking system in the hydraulic hybrid vehicle. Theoretical analysis, analog simulation, and experimental validation of the influencing factors for the energy recovery rate of regenerative braking system in the hydraulic hybrid vehicle with the series connection were conducted in this research, and optimization of these influencing factors were obtained in both the simulation process and experimental process, which was an effective attempt to develop novel regenerative braking system for the generation hydraulic hybrid vehicle. Experimental bench was constructed according to the theoretical model, and a series of experiments on the energy recovery rate with different parameters were conducted, which aimed to validate the simulation results and obtain optimal influencing factors
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