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Cars in the national economy played an invaluable role in vehicle safety , energy saving, environmental performance in the automotive industry in the development process of the three key issues to be addressed . Today's world, energy and environmental issues under increasing pressure , the car's energy performance increasing people 's attention. Countries around the world have focused on the vehicle during braking into heat energy dissipated kinetic energy is recovered and stored utilization studies. Braking energy recycling, on the one hand to improve the car's fuel economy, reduced fuel consumption ; hand reduce automobile emissions , is conducive to environmental protection ; also significantly increase the service life of brake system components . Therefore, the vehicle braking energy recovery system research has important significance. This thesis focuses on year-round operation, brake frequent buses , electric storage presents a brake energy recovery system , this system relative to the vehicle's power - transmission is tied , simple structure , easy installation. This paper first discusses the electrical energy storage of braking energy recovery system overall program design, including the original transmission of this system interfaces with the vehicle location selection and coupling device design, system growth mechanism design , clutch control , energy recovery program design, energy storage and energy fast mass storage device design and the entire system control unit ECU 's design. And from the function of each module needs, this electrical storage of braking energy recovery system for the overall program design argument . Papers by testing the law on public transportation vehicles braking conducted statistical analysis , and the establishment of related models , the transit vehicle braking energy recovered were simulated . Thereby determining the transit vehicle driving conditions and driving process control strategy. According to this braking energy recovery system function module division, mathematical modeling of individual modules and based on MATLAB / simulink software simulation, including: harmonic gear model , clutch model , motor model , battery model , vehicle model , etc., a series of individual modules simulation analysis . Simulation results show that the design of the braking energy recovery system, brake energy recovery efficiency of 24.3 percent.
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