| The development of automobile industry brings about increasingly serious problems of environment pollution and the scarcity of oil source, so it is imperious to seek for a new technology of saving energy, reducing the exhaust emission of automobile and the replaceable material. The electric vehicle (EV) is the best method to solve these both problems, but its development is currently limited by no breakthrough in battery evolvement. Having the characters of low pollution and low oil-consumption, the hybrid electric vehicle (HEV) is an ideal choice to solve these existing problems at present. Therefore, the investigations on HEV become new hotspot in the field of international and national automobile.This paper's research task is based on our school and Shenzhen juhua Corporation's hybrid electric vehicle project. At first, this paper pays more attention to analyzing the advantages and disadvantages of series hybrid electric vehicle (SHEV) and parallel hybrid electric vehicle (PHEV), and decides to adopt the configuration in series, the components of the power train include the lead acid battery, AC induction motor and diesel engine. Moreover, the thesis also introduces the simulation software of HEV—ADVISOR. On the basis of requirement analysis, the best working curve is decided according to the efficiency and emission of the engine. With ADVISOR as a desktop, the paper studies the influence of the component parameters and control parameters on the fuel economy and emission of the hybrid electric transit bus (HETB), brings forward method of parameter matching and evaluating system of hybrid control system. This paper brings forward the whole rules of parameter matching, which is satisfying the power demand to drive HETB and the best fuel economy. Afterward, the paper accomplished the parameter matching of series HETB components and power train control system. After analyzing on the result of parameter matching, this conclusion can be reached that the parameters designed are feasible. The fuel economy of HETB is better than conventional transit bus, and the emission of HETB is less than the conventional transit bus, which sufficiently demonstrates the advantage of HEV.As a key technology, the motor control technology plays an important role in developing the hybrid vehicle. It ensures that it not only can meet with all kinds of modes of the vehicle, but also can improve fuel economy and dynamic performance. On the basis of the principle of Direct Torque Control, a control strategy of the grade of errors for induction motor has been proposed, and the dynamic mathematical modal of the motor and the motor's forward simulation modal based on MATLAB/Simulink desktop are built. At last, this paper develops motor control system's forward simulation software in combination with Visual C++ and MATLAB. The simulation results show this software runs well on the simulation of hybrid electric vehicle's motor control. And this software puts a basis on the development of forward simulation software for hybrid electric vehicle.
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