Abstract
This paper took a new energy vehicle feedback system as the research object, aiming to study the energy recovery law of the new energy vehicle under braking feedback and taxiing feedback conditions. Firstly, the braking energy feedback control strategy and different forms of taxiing energy feedback were studied. Then the integration and application of braking energy recovery system were carried out on a pure electric bus and a hybrid electric bus, with each vehicle model corresponding to different integration and test schemes, which provided a guarantee for the relevant test of real vehicle environments. Finally, relevant vehicle experiments were carried out to test the impact of superposition and coordination strategies on the contribution rate of braking energy recovery under a typical Chinese city bus circle and compared the difference in vehicle energy consumption with and without taxi feedback strategy. The test results showed that the coordinated braking energy recovery control strategy can make more effective use of the maximum torque that can be fed back by the motor, and the fuel consumption of the taxiing feedback mode was lower than that of the no taxiing feedback mode under different driving conditions.
Highlights
Due to the oil crisis and growing environmental awareness that continues to improve, the arrival of the era of new energy vehicles is highly valued by the society
In the integration of a brake energy recovery system in a pure electric bus, while using the original vehicle controller (VCU), the brake energy recovery function and brake anti-lock function were integrated into one brake controller (BCU), and the CAN network ing the original vehicle controller (VCU), the brake energy recovery function and brake anti-lock function were integrated into one brake controller (BCU), and the CAN network was used to communicate between the controllers
An experimental study on braking feedback as well as taxiing feedback systems for new energy vehicles was conducted with the following main findings
Summary
Due to the oil crisis and growing environmental awareness that continues to improve, the arrival of the era of new energy vehicles is highly valued by the society Their short driving range and insufficient endurance have become the main problems in the development of new energy vehicles [1,2]. Braking feedback technology is to recycle the energy lost during braking to improve the cruising range and driving performance of new energy vehicles [16]. The research on braking energy recovery energy management strategies has been extensive and in depth, further system analyses will be necessary for the integration and application of braking energy recovery systems on pure electric buses and hybrid buses. One of the most extensive and in-depth studies in the field of braking energy recovery is the energy management strategy. Brake energy management companies want to use as much electric power as possible, and need to consider the limitations of regulations, motor external characteristics, battery SoC and other factors in the strategy design
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