Design And Simulation Of Power System For Hydraulic Hybrid Garbage Truck

Characteristics of urban garbage truck driving conditions include: fixed route,low speed,long idle time,start and stop frequently.This has resulted in garbage truck's poor fuel consumption and emissions.First of all,this paper describes the development status and trend of hydraulic hybrid vehicles both at home and abroad,analyzes the advantages and disadvantages of different forms of hybrid system structure,and defines a structure scheme for a hybrid hydraulic hybrid system suitable for urban waste trucks.Secondly,this paper presents a new variable pump/motor structure scheme for hydraulic hybrid vehicles,designs its main components,and analyzes the efficiency of such new variable pump/motor.Then,this paper analyzes the typical driving conditions of the hybrid hydraulic hybrid garbage truck and various driving working modes.In order to improve the fuel economy of the vehicle,this paper designs an energy control strategy based on the logic threshold,and realizes the switching between the working modes.Finally,the main components of the hybrid hydraulic hybrid waste truck are selected and matched with the parameters,including engine,variable pump/motor,accumulator,transmission and so on.Based on the AMESim and Simulink/Stateflow joint simulation platform,the hybrid model,the engine model,the transmission model,the vehicle model and the hydraulic drive system were established in the AMESim software and the energy Control strategy model was established in the Stateflow software.The simulation and analysis of the economic and dynamical characteristics of the hydraulic hybrid vehicle are carried out by using the Simulink-based operator.And analyzes and compares the fuel economy's improvement of the hybrid hydraulic hybrid waste trucks and traditional garbage trucks;analyzes and compares the changes in the efficiency of the new variable pump/motor and the conventional variable pump/motor in the hybrid garbage truck,and the fuel consumption of the hybrid waste truck.If the driving condition of the garbage truck is only considered,the fuel economy of the hybrid garbage truck,using new variable pump/motor,is 37.2% higher than that of the traditional garbage truck;the fuel economy of the hybrid garbage truck,using conventional variable pump/motor,is 30.5%higher than that of the traditional garbage truck.