PFI汽油机空燃比控制仿真及试验研究
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摘要
基于发动机台架试验,建立并标定了进气道燃油喷射单缸汽油机一维仿真模型,探索了空燃比控制的新方法。依据经典控制理论,通过所建空燃比PID控制器与参数整定,实现了稳态空燃比控制。基于x-τ油膜模型,提出了其代数控制X-Y油膜方程,分析了进气道燃油传输过程对空燃比控制的影响;通过燃油阶跃扰动法,对X,Y参数进行识别,获得了X,Y参数MAP图,构建了离散化燃油动态补偿器,实现了空燃比在瞬态工况下的前馈控制。
Based on the engine bench test,one-dimensional simulation model of intake port fuel injection for single gasoline engine was built and calibrated and the control method of air-fuel ratio was explored.Steady-state AFR control was achieved by the PID controller with the built AFR and parameter identification according to the classical control theory.Based on the model of x-τfuel film,the X-Yfuel film equation of algebraic control was proposed and the influence of fuel flow process in intake port on AFR control was analyzed.The parameters Xand Y were identified,the MAP of Xand Y was achieved,the discrete fuel dynamic compensator was constructed and the feed forward control of AFR control for transient conditions was realized by the fuel step interference method.
Based on the engine bench test,one-dimensional simulation model of intake port fuel injection for single gasoline engine was built and calibrated and the control method of air-fuel ratio was explored.Steady-state AFR control was achieved by the PID controller with the built AFR and parameter identification according to the classical control theory.Based on the model of x-τfuel film,the X-Yfuel film equation of algebraic control was proposed and the influence of fuel flow process in intake port on AFR control was analyzed.The parameters Xand Y were identified,the MAP of Xand Y was achieved,the discrete fuel dynamic compensator was constructed and the feed forward control of AFR control for transient conditions was realized by the fuel step interference method.
引文
[1]刘永长.内燃机原理[M].武汉:华中科技大学出版社,2001:272-273.
[2]万冬.小型电控汽油机进气道油膜动态特性的实验研究[D].天津:天津大学,2006.
[3]Heywood J B.Internal Combustion Engine Fundamentals[M].[S.l.]:Mc Graw-Hill Book Company,1988.
[4]Chen-Fang Chang,Nicholas P Fekete,David Powell J.Engine Air-Fuel Ratio Control Using an Event-Based Observer[C].SAE Paper 930766,1993.
[5]Hires S D,Overington M T.Transient Mixture Strength Excursions-An Investigation of Their Causes and the Development of a Constant Mixture Strength Fueling Strategy[C].SAE Paper 810495,1981.
[6]徐宁宁.单缸摩托车发动机电喷及试验系统设计与分析[D].武汉:华中科技大学,2011.
[7]万里平,蒋炎坤,郭岩,等.基于油耗和空燃比的汽油机充气效率测定方法[J].农业机械学报,2014(3):32-36.
[8]吴义虎,侯志祥,申群太.基于神经网络的车用汽油机过渡工况空燃比辨识[J].车用发动机,2007(2):40-43.
[9]Aquino C F.Transient A/F Control Characteristics of5 Liter Central Injection Engine[C].SAE Paper810494,1981.
[10]Wan L P,Jiang Y K,Wang S.Study on AFR Control for a PFI Air-Cooled Motorcycle Engine[C]//Proceedings of Advanced Materials Research.[S.l.]:Trans Tech Publ,2014:1421-1424.
[11]李明伟.摩托车发动机电控系统的开发及其油膜补偿器的研究[D].长春:吉林大学,2006.
[12]姚栋伟.汽油机燃用乙醇汽油混合燃料的空燃比控制技术研究[D].杭州:浙江大学,2010.
[13]朱航,王绍光.电控汽油机进气管道油膜特性参数的标定[J].汽车工程.2004(2):127-130.
[14]Hendricks Elbert,Thomas Vester Holm.Nonlinearity ransilen compensation(NTFC)[C].SAE Paper930767,1993.
[15]Alain Chevalier Martin Muller Elbert Hendricks.On the validity of mean value engine models during transient operation[C]//SAE 2000 World Congress.Detroit:SAE,2001.
[2]万冬.小型电控汽油机进气道油膜动态特性的实验研究[D].天津:天津大学,2006.
[3]Heywood J B.Internal Combustion Engine Fundamentals[M].[S.l.]:Mc Graw-Hill Book Company,1988.
[4]Chen-Fang Chang,Nicholas P Fekete,David Powell J.Engine Air-Fuel Ratio Control Using an Event-Based Observer[C].SAE Paper 930766,1993.
[5]Hires S D,Overington M T.Transient Mixture Strength Excursions-An Investigation of Their Causes and the Development of a Constant Mixture Strength Fueling Strategy[C].SAE Paper 810495,1981.
[6]徐宁宁.单缸摩托车发动机电喷及试验系统设计与分析[D].武汉:华中科技大学,2011.
[7]万里平,蒋炎坤,郭岩,等.基于油耗和空燃比的汽油机充气效率测定方法[J].农业机械学报,2014(3):32-36.
[8]吴义虎,侯志祥,申群太.基于神经网络的车用汽油机过渡工况空燃比辨识[J].车用发动机,2007(2):40-43.
[9]Aquino C F.Transient A/F Control Characteristics of5 Liter Central Injection Engine[C].SAE Paper810494,1981.
[10]Wan L P,Jiang Y K,Wang S.Study on AFR Control for a PFI Air-Cooled Motorcycle Engine[C]//Proceedings of Advanced Materials Research.[S.l.]:Trans Tech Publ,2014:1421-1424.
[11]李明伟.摩托车发动机电控系统的开发及其油膜补偿器的研究[D].长春:吉林大学,2006.
[12]姚栋伟.汽油机燃用乙醇汽油混合燃料的空燃比控制技术研究[D].杭州:浙江大学,2010.
[13]朱航,王绍光.电控汽油机进气管道油膜特性参数的标定[J].汽车工程.2004(2):127-130.
[14]Hendricks Elbert,Thomas Vester Holm.Nonlinearity ransilen compensation(NTFC)[C].SAE Paper930767,1993.
[15]Alain Chevalier Martin Muller Elbert Hendricks.On the validity of mean value engine models during transient operation[C]//SAE 2000 World Congress.Detroit:SAE,2001.