发动机全可变配气参数多元回归耦合研究

基于柴油机仿真模型，依据正交实验原则仿真获得气阀运动参数耦合数据库，利用多元回归分析方法分析配气参数之间的耦合特性，获得气阀运动参数实际最优解.建立电液全可变发动机联合仿真模型验证实际最优解.联合仿真结果表明实际最优解比原优化值功率提高3.8%，在发动机性能提高的前提下，进排气阀平均速度分别降低31.1%和37.5%.获得的配气参数实际最优解可以满足电液系统的驱动能力，有效提高驱动效率. 

Engine Fully Variable Valve Parameters Coupling Study Based on Multiple Regression Analysis

To obtain the optimum solution of valve running parameters, the coupling rules among valve parameters were analyzed based on a simulation model of four-cylinder diesel engine, the multivariate regression analysis method, and a valve parameter coupling data base by simulation orthogonal experiments. Further more, an electro-hydraulic fully variable valve model of the engine was built to verify the actual optimal solution. The combined simulation results show that, the optimal solution is improved by 3.8% than the original optimal power, and the average speed of inlet and outlet valve is decreased by 31.1% and 37.5% respectively in the premise of improving the performance of the engine. Finally, the optimal solution of the valve parameters obtained by the regression model satisfies the driving ability of electro-hydraulic driving system and improves the driving efficiency effectively.