| In the21st century, automotive industry develops rapidly, in the meanwhile it’s alsosubject to the constraints such as energy shortages, environmental pollution and globalwarming, so the traditional automotive industry has entered a development bottleneck.Today’s world automotive industry will further focus on the harmonious development ofenvironment, resources and transportation. And extended range electric vehicles (E-REVs) isjust a kind of electric vehicles which can work in the condition of all-weather and all-road anddon’t have to worry about the lack of battery’s power. E-REV is a pure electric vehicle whichis equipped with surface charging and power suppling in-car function, and in pure electricmode it has some advantages of zero emissions, zero pollution and so on, meanwhile it hashybrid vehicles’ advantages of long driving cycle and strong power. Therefore E-REVs is oneof the main direction of future electric vehicles’ development, and is ideal for a smoothtransition from traditional vehicles to pure electric vehicles. This paper is based on“Powertrain Parameter Matching and Optimization of Extended Range/Plug-in ElectricCommercial Vehicle”(Grant No.: SQ2011GX05D03011), which belongs to the National HighTechnology Research and Development Program (Program863)“Key Technology Researchon Extended Range/Plug-in Electric Commercial Vehicle”. This reaserch designs a specialtyelectric vehicles-extended range electric commercial sanitation trucks based on a ShaanxiAuto heavy commercial vehicle for the prototype car, which can travel on urban road tocomplete the city sanitation work. This paper studies on powertrain parameter matching andcontrol strategy. The main research works are the following:1. Powertrain system modeling. By determining basic structure and operating principleof E-REVs, and by working with platform MATLAB/Simulink, using the modular approachthis paper accomplishs the simulation model of a E-REV from mathematical model based onthe model of series hybrid electric vehicle in ADVISOR. And this simulation model consistsof vehicle dynamics model, range-extender model, motor model, battery model, transmissionsystem model and wheel model. 2. Powertrain parameters matching. Choosing a heavy commercial vehicle of ShaanxiAuto as the prototype vehicle, the paper calculates on the basis of design specifications’parameters of target electric heavy-duty sanitation trucks, and simply matches and selectspowertrain components, then according to the powertrain arrangement and driving conditionsit matches powertrain parameters based on reference for the analysis of vehicle dynamics,including motor, battery and range-extender (including engines, generators, etc.), meanwhilewe should guarantee the premise of power and driving range required for vehicle driving andmeet targets of vehicle efficiency, rate of fuel consumption, exhaust emissions.3. Reaserch on control strategy. Analyse three operating modes of E-REVs and realizemultiple working mode control method which can complete works flexibly and forthwithalternating three operating modes. Aiming at the engine and the motor which are extremelyimportant in the structure and control system of the E-REV, it does some relevant reaserch oncontrol strategy, including driving motor selecting brushless DC motor. Aim at brushless DCmotor used for E-REV, its double-loop speed control system and adaptive fuzzy PID controlstrategy are studied.4. Study on dynamic and fuel economic simulation. Analyse and compare driving cyclesin ADVISOR, and select the closer cycle NYCTRUCK based on the target driving condition.With NYCTRUCK do many dynamic simulations experiments which include accelerationtime, maximum speed and maximum gradability, and do many economic simulationexperiments which include main components’ efficiency, vehicle efficiency and fuelconsumption rate. Then analyse the simulation results and point out the lack of this study andthe terms of future work in need of being deeply improved and studied. |
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