Research On The Regenerative Braking System Of Semi-trailer Based On AMESim

This paper is based on the prototype of a certain type of semi-trailer to study the influence played by the main parameters of main components on the energy recovery efficiency,reasonable allocation strategy for three axis braking force and braking energy recovery efficiency under different braking conditions.First of all,the stress state in the baking process of semitrailer is studied,and on the basis of the force of hydraulic pump / motor displacement,the storage volume,pre-charge pressure,maximum pressure,minimum pressure,transmission ratio torque coupler are calculated.According the calculating result,the models were selected;secondly,combining the characteristics of the semi-trailer,two kinds of regenerative braking control strategies under different conditions is put forward:(1)the comprehensive control strategy combining control strategy of fixed ratio of braking force control strategy and the best braking force control strategy the strength under non emergency conditions.(2)In emergency braking system,the strength of the power between shafts is matched using ideal force distribution curve,braking force of trailer rear axle use the control strategy combining best regenerative braking power and braking friction force braking;finally,the main components and two regenerative braking force control strategy model of regenerative braking system is established to investigate effects of main element parameters and different braking conditions on semitrailer braking energy recovery.Research results show that:(1)Adding hydraulic regenerative braking system into semi-trailer can recover energy during the braking process,improve the dynamic performance of the semi-trailer in driving process,and in favor of enhancing semi-trailer driving displacement and speed increase,reducing semi-trailer fuel consumption indirectly.(2)The increase of hydraulic pump / motor displacement,is conducive to reducing the semi-trailer brake displacement,but not conducive to the improvement of braking energy recovery efficiency;the smaller the energy storage volume,the higher the final pressure of accumulator,but if the maximum pressure caused by small volume of energy storage is greater than the design pressure of hydraulic system,leakage of oil will happen,making energy cannot be fully recovered;the smaller pre charge pressure of energy storage device is more conducive to energy recovery,at the same time,more conducive to improving the efficiency of braking energy recovery.(3)The use of two different braking force distribution control strategies to brake under different initial speeds,have different effects on braking energy recovery of semitrailer.The bigger initial braking speed,increases the brake displacement and braking time,is beneficial to increase the pressure amplitude of the accumulation,and increase the energy recovery efficiency.