A Study On Combustion Processes Of Spark Ignition Engine Fueled With Various Component Coal Bed Methane

The energy industry is an industry which have a great influence for the development of the social. To keep the rising China's economy, the energy industry of China faces two serious problems, the energy supply and the pollution of the environment. Thus, we must seek for a balance among the energy, the environment and the development of the economy.Under this background, we successfully developed an engine fuelled with coal-bed gas and ignited by spark plug. The measurements for the prototype engine were thoroughly made, including the cylinder pressure, the rate of heat release, combustion duration, ignition delays, spark ignition angle, and the fluctuation of the cylinder maximum pressure. The following conclusions were drawn after intensively analyzing experimental results. The methane contentration, the load, and the spark ignition angle will influence the cylinder maximum pressure's variation, the combustion duration and the combustion.The combustion of the spark ignition engine fueled with various component coal-bed methane has been studied deeply and thoroughly in this thesis. The model, a quasi-dimensional two-zone combustion modelwith varying steps, has been developed by using MATLAB language. Based on the combustion model, the intermediate combustion products, the rate of the heat release in the swirl chamber, the engine's transient pressure and temperature are traced in details during the calculation. The results show that the change of the components in the coal-bed gas will influence the combustion performance of the prototype engine.In this paper, a calculation method of combustion heat release rate for the swirl chamber coal-bed gas engine is concerned. It can be a useful tool on analyzing the combustion processes for this type engine.