الفهرس 
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Abstract
Internal combustion engines are the major contributors to the air pollution in the world. Reducing vehicular emissions and enhancing fuel economy will be effective in improving the air quality. Recent advances in diesel combustion technolgies, better afterburners and catalytic oxidizers, and use of alternative fuels such as compressed natural gas CNG, propane and methanol have resulted in overall reductionin the emission of particulate matters and other gaseous emissions such as volatile organic compounds, nitric oxides, and oxides of carbons. In light of uncreased use of cars and other public transportation, and ever more congested traffics, additional steps must be taken to reduce emissions even further.
The most efficient way of reducing the energy consumed by automobiles is to use more energy efficient propulsion systems like electric vehicle. Despite electric vehicles help the invironment by eliminating exhaust emissions and reducing dependency on fossil fuels the disadvantages of limited range anf increased vehicle weight limit their use in commercial applications.
Current technology has been applied to create more energy efficient vehicle propulsion systems by combining an internal combustion engine ICE and an electric propulsion system into a single system that is more efficient than conventional using an ICE alone. A vehicle that combines an ICE and an electric propulsion system is commonly called a hybird electric vehicle HEV. Hybird-electric vehicles solve many of the problem of the pure electric vehicles such as short range and excessive weight, battery cost and battery life.
The technology for gybirds is developing at a fairly rapid pace, as new battery technologies evolve, higher efficiency drivetrains are developed, and alternative energy sources, such as fuel cells, approach practicality. In order to evaluate these new components and determine what is require to meet specified performance criteria, computer simulation tools will be used.
The aim of this thesis is to drive a mathematical modeling for each part of the series hybird electric vehicle, the simulation can be using software MATLAB/SIMULINK , and then the performance characteristics, for each part in the vehicle, are also obtained at different operation patterns using MATLAB programming language.