%0 Journal Article %T Analysis of LPG Engine PID Parameter Control of Transient Air-fuel Ration Based on Improved Elman Neural Network %A Jubiao Yao %A Keyu Jiang %A Chaoyi Yao %J Journal of Software %D 2010 %I Academy Publisher %R 10.4304/jsw.5.1.54-64 %X This paper puts forward one kind of air-fuel ration control method which integrates improved Elman neural network with normal PI control.It constructs a model of the single LPG electro-plating engine and simulation platform for air-fuel ration controlling with GT-Power software which seamless connect to Matlab/Simulink based on JL1P39FMB single cylinder engine and develop the electronic fuel-injected controller based on Intel MCS-96. It also constructs mini LPG electro-plating engine experiment system for air-fuel ration to the LPG Injection System and adopt the new inlet channel injection type of duty ratio controlling injector. Help the throttle percentage-rev- duty cycle pulse spectrum diagram after the calibration bench experiment for the best duty cycle of mini electronic LPG-injected under the steady working conditions. It predicts the air-fuel ration signals of nontransmission delay through the Elman neural network. The normal PI controller which deals with the predictive signals implements the concurrent control of air-fuel ration under transient conditions. The bench test and the simulation result indicat %K PID parameter Control %K Air-fuel ration under transient %K Elman Neural Network %K Predictive control %U http://ojs.academypublisher.com/index.php/jsw/article/view/616