Engine Combustion Analysis Based On Test System

At present, each country attaches great importance to the research of the combustion in the engine cylinder, which is very important for the optimization and development of the engine.Nowadays, a series of the combustion analysis systems developed abroad are used in the market, but it’s combustion analysis system is complex and expensive, and it can not meet the needs of domestic researchers’ demand.Although the domestic researchers explore and develope a large number of combustion analysis systems, however, it is a truly international competitiveness and there are pretty less used in the market. So it is very necessary to research and develop the engine combustion analysis system and make analysis on the engine internal combustion, no doubt, it can be used to accelerate the development of the domestic combustion analysis system to be used in the scientific research institutions and the market. According to the test requirements, the overall strategy of the test analysis system is defined.By means of Kistler cylinder pressure sensors, data acquisition cards, high performance filters, combustion analysis softwares(based on LabVIEW), database and mature analysis methods, the reasonable effectively build and debug the test bench. At the same time, it can be done off-line data analysis and processing, mainly covers on point correction, zero drift correction, data smoothing and equalization etc. Combustion analysis function and a lot of combustion measurement information of continuous optimization, so the more reliable and accurate image data can facilitate the analysis of combustion engine development. Economy is an important indicator of the performance of the engine, the cylinder of the engine work is not uniform is the main cause of its economic reduction.The difference of multi-cylinder engine between the each cylinder machinery manufacturing and the air-fuel ratio or the amount of air is not uniform, causing part of the cylinder air-fuel ratio is too thin or too thick. At the same time, the operating condition is not stable, the local spontaneous combustion or lose the fire, all of those factors lead the engine fuel consumption rate to rise. Meanwhile, the maximum pressure in the cylinder and the knock are the factors that can’t be ignored in the whole engine. In order to have a more comprehensive understanding of the combustion status of the engine,using this test and analysis system on the four cylinder engine(3433-06) and the eight cylinder engine(561F), The relative relationship between the pressure and the crank angle is recorded and collected, and the numerical value of some important parameters of each cylinder is also measured and recorded.. The stability and accuracy of the developed engine combustion analysis system are verified, which provides an effective reference and basis for the domestic combustion analysis...