Modeling And Simulation Of Heavy - Duty Series Hydraulic Hybrid Electric Vehicle Based On AMESim

With the increase of human demand for material products, agriculture, manufacture and transportation get rapid development worldwide. Due to the consumption of energy, low efficiency of energy using and excessive pollutants, the problem of environmental pollution is getting ever more acute. The introduction of hydraulic hybrid technology can significantly improve fuel economy of vehicles; reduce the vehicle dynamics system power and emissions and noise pollution of the engine.High density of accumulator’s power makes this technique especially suitable for conditions with frequent starting and stopping in heavy load automobile. This paper selects Chinese production (HOWO6x4), ZZ3257N2948B the dump truck as a research object and conducts the thorough research to the series hydraulic hybrid technology. The main research contents are as follows:(1) The basic schemes of hydraulic hybrid system types are explained under comparison, and finally a series hybrid type hydraulic pressure is selected as the driving scheme.(2) Based on the structural characteristics of the hybrid vehicle and the working process of regenerative braking, dynamic analysis is carried out. With the requirements of the design of vehicle driving and braking energy recovery characteristics, the parameters and models of hydraulic hybrid vehicle key components which are required is analyzed and determined.(3) Based on MATLAB/Simulink to build rule-based State of Charge (SOC), different working modes is set up. The hydraulic system components, such as hydraulic variable pump, variable hydraulic motor’s swash plate angle can be changed. By changing the swash plate angle the hydraulic components of the engine can be changed; and the electromagnetic clutch connecting and disconnecting is under control.(4) Combined the method of theoretical modeling and numerical modeling and based on AMESim platform, we completed the modeling of vehicle model, the series hydraulic hybrid heavy vehicle accumulator model, the variable hydraulic pump and variable hydraulic motor hydraulic system; Connecting with the MATLAB/Simulink to achieve the co-simulation.(5) Under the different conditions and working modes, through the use of CO simulation of AMESim and MATLAB/Simulink, we can analyze the data, verify the correctness of the theoretical research, and analyze of the hydraulic pump/motor response to precisely control and put the effects of various control strategies on hydraulic hybrid vehicles.