PFI汽油机空燃比控制仿真及试验研究 |
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引用本文: | 蒋炎坤,王松,谢满. PFI汽油机空燃比控制仿真及试验研究[J]. 车用发动机, 2015, 0(6): 44-49. DOI: 10.3969/j.issn.1001-2222.2015.06.009 |
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作者姓名: | 蒋炎坤 王松 谢满 |
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作者单位: | 1. 华中科技大学能源与动力工程学院,湖北 武汉,430074;2. 东风商用车有限公司技术中心,湖北 武汉,430056 |
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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。
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关 键 词: | 汽油机 进气道喷射 空燃比 前馈控制 闭环控制 |
Simulation and Experimental Study on Air-fuel Ratio Control of PFI Gasoline Engine |
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Abstract: | Based on the engine bench test,one-dimensional simulation model of intake port fuel injection for single gasoline en-gine 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-τ fuel film,the X-Y fuel film equation of algebraic control was proposed and the influence of fuel flow process in intake port on AFR control was analyzed.The parameters X andY were identified,the MAP of X andY 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. |
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Keywords: | gasoline engine port fuel injection(PFI) AFR feed forward control closed loop control |
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