Study of Fuzzy Control Fuel Injection on High-Pressure Common-Rail Diesel Engine

• Main Authors: Suen Wei Lun, 孫尉倫
• Other Authors: Chang I Ping
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/68066856072098602187

碩士 === 大葉大學 === 機械與自動化工程學系 === 102 === The objective of this study is fuzzy control of fuel injection timing and injection pressure corresponding torque and emission for a multi-cylinder four-stroke direct injection common rail diesel engine. From torque and emission experimental data, relationship between emissions, performance and fuel injection are correlated to establish better fuzzy control rules. Experimental data of fuel injection parameters on performance, were simulated to find relations and their effects were analyzed, fuzzy control rules were set to adjust output injection timing and injection pressure. The fuzzy logic controller inputs including emissions of nitrogen oxides, smoke and torque and outputs are injection timing and injection pressure. Simulation of fuzzy control study based on three different membership functions: Trapezoid function(Trapmf), Gaussian function(Gaussmf), and Triangular (Trimf). They were compared with the optimized results from experimental design to find their relative errors. Further experimental test results were used to compare and validate which model of the fuzzy control strategy is better. The different results of fuzzy fuel injection control under various operating conditions were compared to find the system relative error and accuracy. Using fuzzy control simulation, one can quickly adjust the engine fuel injection system parameters. Engine fuzzy logic control method established in this study can provide later high-pressure common rail diesel injection engine fuel injection system controller research and development reference.