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Study On Vehicle Control Strategy And Assembly Parameter Matching For Hybrid Electric Bus

Posted on:2006-10-15Degree:DoctorType:Dissertation
Country:ChinaCandidate:M H LiuFull Text:PDF
GTID:1102360155453594Subject:Vehicle Engineering
Abstract/Summary:PDF Full Text Request
There are two serious problems against the continual development of automotive industry at present. One is environmental pollution; the other is deficiency of petroleum resources. Hybrid electric vehicle (HEV) employing two power sources -internal combustion engine (ICE) and electric motor (EM), has been accepted world-widely as one of the most promising methods to solve these two problems. In Japan, the United States and European countries, governments and automobile manufactures have invested a lot to develop HEVs, HEV components and the key HEV technologies. The Ministry of Science and Technology of China has also set the development of HEVs and HEV components as one of the most important sub-projects in the 863 Program. The key technologies of modeling, simulation and testing for HEV are detaildly proposed based on this project of Jiefang HEV public bus developed by FAW. Parametric design and control strategy of hybrid electric vehicle are the core and base of development of HEVs, which are confidential technology of a company and embodiment of independent intellectual property right, and foreign companies keep them as top secrets. Therefore, to study control strategy and parametric design of hybrid electric vehicle in a systematic way and validate them again tests, providing a theoretic method to develop control system of HEV powertrain and design the vehicle scenario. The offline simulation model for HEV is set up by appliying Matlab/Simulink. The parametric design and control stategy are detaildly researched based on developed dricng cycles for Beijing, Shanghai and Changchun respectively. The tests for CAN communication, components characteristics, all kinds of function models and control stategy and control algorithm are performed by setting up test bench, which supports the rolling and road test for HEV. At the same time, the development procesure ia set up for HEV, namely, fist, getting consumer requirements, then, selecting hybrid electric powertrain, design component parametrics, and then, development control strategy, at last, validation by test bench, rolling and road test, which supplies theory fuandation for independent of development. 1. Hybrid electric powertrain selection and modeling for HEV The parallel configuration is put forward based on analizing the advantages and disadvantages for series ans parallel powertrain for hybrid electric powertrain structure. Then, the type for powertrian, such as engine, storage, motor and transmission is selected respectively according to analyzing the component for HEV. At last, the parallel configuration models are set up by mean of Matlab/Simulink, which supplies the design reference for parametric design and vehicle performance development.. 2. Driving cycle for public city bus The driving cycle has great effect on fuel economy for the HTB(Hybrid Transit Bus), at the same time, the powertrain configuration, parameters matching, control strategy and control algorithm for HEV(Hybrid Electric Vehicle) are based on driving cycle. The detailed testing process and method for public city bus driving cycle is proposed in this chapter. The test data for Beijing, Shanghai and Changchun public city bus are developed by means of the process and designed simply test equipment and data collection system. Based on the theory of probability distribution in statistics, the operation characteristic for public bus is detailedly analyzed. The analysis results show the average speed, operation time, stopping time, acceleration and deceleration speed, and curb load belong to normal probability distribution respectively. At the same time, the distribution of transmission gear is analyzed also. The complex method is put forward to combine the variable operation routes for one city. The driving cycle for Beijing, Shanghai and Changchun public city bus are developed by means of this method. Compared with actual test data, the results show the developed driving cycle can reflect the actual operation state for public city bus, which supplies the design reference for powertrain configuration selection of HEV public city bus. 3. Parametric design and performance simulation for hybrid electric powertrain The parametric design for hybrid electric powertrian component are performed based on powertrain configuration selection and developed driving cycle. The parameters for component such as engine , electric motor, battery and transmission are decided by design analysis and development target. Then, the...
Keywords/Search Tags:Hybrid Electric Vehicle Simulation, Vehicle Control  Strategy, Assembly Parameter Matching, Driving Cycle, Development By Testing
PDF Full Text Request
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