Match Optimization Of The Powertrain And Economy Analysis For Extended Range Electric Vehicle

As automobile industry developing, people’s live and the choice of traveltransportation have changed. At the same time resource crisis and environmentalproblems followed with the phenomenon.In order to keep the sustainabledevelopment of the automotive industry, the global automotive industry graduallydeveloped pure electric vehicles, hybrid vehicles and other new energy vehicles.However, the battery of pure electric vehicles (EV) is restricted to its energy density，durability and other technology and leaded to the vehicle short driving range andhigh cost;Hybrid Electric Vehicles (HEV) has not changed the use of fossil fuels.Extended-Range Electric Vehicle is in between for the vehicle type. It not onlyensures the mileage; but the electricity can replace fossil fuels. Based on the above,this dissertation designed the powertrain system Extended-Range Electric Vehicleand studied. its energy management strategy.This dissertation studied the powertrain system of Extended-Range ElectricVehicle, according to the requirement of vehicle dynamic performance, selected thetype of the drive motor, and thus established the battery and auxiliary unit power.And combined with the requirements of vehicle fuel economy, selected the capacityof the battery, and matched engine and generator of the extender range.This dissertation analyses several control strategies of Extended-Range ElectricVehicle current widely used, and energy management method of the engine.Thedissertation selects energy management strategy,which combine CD-CS strategy withengine thermostat control strategy and power following control strategy. The Societyof Automotive Engineer (SAE) has proposed a standard method for testing hybrids,and that include fuel economy testing methods for PHEVs. And calculation methodof UF weighted vehicle performance are introduced, combing with the test vehicle isanalyzed briefly. The dissertation completed the preliminary design.The vehicle simulation modelwas built in the CRUISE,the dynamic performance and the rationality of thematching results were verified in the experiment.Based on the different energymanagement strategies, under different city driving cycles, compare analysis ofenergy efficiency for the powertrain system and fuel economy, further to research theeconomical potentiality of Extended-Range Electric Vehicle.Through the experimental verification, the energy management strategy used inthis dissertation reduced fuel consumption and battery energy consumption,improved the overall performance of the vehicle, and it showed that this controlmethod is reasonable.