二冲程航空活塞发动机空燃比控制  

Air-fuel ratio control of two-stroke aviation piston engine

作　　者：胡春明[1,2] 张波 刘娜[1] 宋玺娟[1] 杜春媛 HU Chunming;ZHANG Bo;LIU Na;SONG Xijuan;DU Chunyuan(Internal Combustion Engine Research Institute,Tianjin University,Tianjin 300072,China;School of Mechanical Engineering,Tianjin University,Tianjin 300072,China)

机构地区：[1]天津大学内燃机研究所,天津300072 [2]天津大学机械工程学院,天津300072

出　　处：《航空动力学报》2023年第11期2757-2765,共9页Journal of Aerospace Power

基　　金：国家自然科学基金(51476112)。

摘　　要：以某型号二冲程航空活塞发动机为研究对象,通过建立一维、三维发动机模型、喷油器模型和空燃比控制模型,辨析进气量和喷油量的主要影响参数,基于递归神经网络进气量预测和喷油模型,在变工况下对二冲程发动机空燃比控制进行研究。在节气门开度变化的瞬态工况下,将空燃比控制的超调量控制在4.6%以内,能在变工况停止后较短的时间0.3 s内将缸内混合气恢复至当量比。在不同海拔工况的仿真研究下,随着海拔的增高,空燃比控制模型的超调量和回调时间适当减小并逐渐稳定。A two-stroke aviation piston engine was taken as the research object.By establishing one-/three-dimensional engine model,injector model and air-fuel ratio control model,the main influencing parameters of intake and injection were discriminated.Based on the recurrent neural network intake prediction and injection model,the air-fuel ratio control of two-stroke engine was studied under variable working conditions.Under the transient condition of throttle opening change,the overshoot of air-fuel ratio control was controlled within 4.6%,which can restore the cylinder mixture to the equivalent ratio within 0.3 s after the variable condition stopped.Under the simulation study of different altitude conditions,it was found that with the increase of altitude,the overshoot and callback time of air-fuel ratio control model appropriately decreased and gradually stabilized.

关 键 词：航空活塞发动机 空燃比控制 二冲程 递归神经网络 控制优化 

分 类 号：V234.1[航空宇航科学与技术—航空宇航推进理论与工程]