The Research Of Braking Energy Recycle System Based On AMESim-Simulink Co-simulation

With the environment continuously worsening and the vehicle’s holding keeping growing, people take more and more concerns about vehicle energy conservation and emissions reduction. However, it can hardly meet people’s needs to further reduce vehicle’s oil consumption and pollutant emission by refining the combustion condition of engine. Because of the development of hybrid vehicle and electric car, braking energy recycle technology becomes more and more mature. It can decrease traditional vehicle’s fuel consumption and emission greatly by applying braking energy recycle technology to these vehicles with little cost. In this paper, it recycles vehicle’s braking energy with hydraulic methods and reuses the energy to drive generator. It can save the braking energy, and at the same time, because engine doesn’t drive regenerator all the time, it also improves the engine’s working condition. Consequently, it lessens the vehicle’s fuel consumption and emission.This paper introduces the way to improve vehicle’s fuel economy and emission through breaking energy recycling with hydraulic methods for some vehicle. It analyzes the parameter matching for critical hydraulic components and vehicle and builds the vehicle model and hydraulic system with AMESim. Based on ECE R13braking law and the target vehicle, the strategy for brake force distribution is formulated under the premise of securing the brake safety. The engine high efficient working range is assured through the optimal working curve of the engine drawn by experiment and the actual work condition. It insures the hydraulic system can offer enough energy for regenerator when the driving cycle contains less braking condition. The control strategy is built on the basis of brake force distribution strategy and engine high efficient working range in Simulink.Taking advantage of the co-simulation of AMESim and Simulink, it proves the brake system’s safety and energy recyclable through the analysis of the performance under typical braking condition. System’s working performance under standard working condition NEDC is analyzed. The engine high efficient working range is optimized making the recharge of hydraulic accumulator more reasonable. The hydraulic pressure oscillation is optimized to reducing the pressure shock to the hydraulic components. The structure improvement is proposed because of the shortage of the hydraulic recharge efficiencies. And the two models’features are discussed.