Simulation Analysis Of Heavy-duty Hybrid Electric Vehicle’s Power And Fuel Economy

With the global energy shortage and environmental pollution problems becomingincreasingly serious, the development of automobile industry has been greatlyrestricted; therefore the development of new energy vehicle has become the inevitablechoice of the world auto industry. Hybrid electric vehicle has the potential to lowerfuel consumption and low emissions, its power is close to conventional car, while itsproduction costs are lower than pure electric vehicle, hybrid electric vehicle hasbecome one of the most practical significance ways to solve the problem of sewageand energy.On the basis of YTO Group Corporation’s heavy mining dump truck associatedwith the technical conditions, a heavy-duty hybrid electric vehicle is designed. Byanalyzing the classification and structural characteristics of hybrid electric vehicle,parallel hybrid electric vehicle whose coupling method is torque coupl is chosen asresearch subjects. According to the automobile theory, the power matching principleand dynamic performance indices, the Powertrain Parameters of heavy-duty hybridelectric vehicle is matched, the type and the specific parameters of engine, motor andbattery are obtained. The simulation model of heavy-duty hybrid electric vehicle’spowertrain system is built in the CRUISE simulation software, the model includesengine model, motor model, battery model, driver model, clutch model, transmissionmodel, brake model, tire model and other model. The according to the direction ofenergy flow in the power system, mechanical connection, electrical connection andsignal connection are connected. The characteristics of logic threshold control strategy,transient optimization control strategy, fuzzy logic control strategy and globaloptimum control strategy are introduced and analyzed. The logic threshold controlstrategy based on the torque factor is built in the MATLAB/SIMULINK simulationsoftware. The simulation tasks are set up, and the simulation results are analyzed withjoint simulation of heavy-duty hybrid electric vehicle simulation model and control strategy. The simulation results show that the dynamic performance and fuel economymeets the design requirements and the parameter matching and control strategy arereasonable. This research will be worth referring to the future research.