基于模型的汽油机过渡工况空燃比控制研究  

Research on A/F Control of a Gasoline Engine Based on X-τ Model in Transient Conditions

作　　者：顾维东[1] 杨延相[1] 白富强[1] 

机构地区：[1]天津大学

出　　处：《汽车技术》2007年第7期6-9,共4页Automobile Technology

摘　　要：针对汽油机过渡工况的空燃比控制精度问题,对装备FAI电喷系统的汽油机进气道内燃油动态特性现象学模型(X-τ模型)参数进行了标定,并分析了进气道温度、发动机转速和负荷对模型参数的影响。通过对汽油机过渡工况空燃比进行的基于模型的控制试验,验证了该方法可以有效满足汽油机对过渡工况空燃比快速响应、精确控制的要求。Based on A/F control accuracy of a SI engine in transient conditions,the experiment has been carried out to calibrate the X-τ model parameters of fuel dynamics characteristics phenomenon in a gasoline engine inlet duct with FAI EFI system,the influence of inlet duct temperature,engine rotation speed and load on X-τ model parameters has been analyzed.The A/F control experiment result shows that the control scheme based on X-τ model can realize the rapid response and accurate A/F control requirements.

关 键 词：汽油机 X-τ模型 过渡工况 空燃比控制 

分 类 号：U464.171[机械工程—车辆工程]