汽油发动机瞬态工况油膜参数辨识的研究

Parameter Identification of Fuel Film Model Transient Condition for Gasoline Engine

以四冲程汽油发动机为研究对象建立瞬态工况下油膜模型,用最小二乘递推算法对油膜参数进行辨识计算研究;建立了发动机空燃比的仿真模型。将辨识结果模型进行某瞬态工况空燃比仿真,并和实际发动机试验采集的空燃比进行对比。结果表明,最小二乘递推算法所辨识的油膜参数精确度较高,能满足实际控制要求,证明该辨识算法辨识油膜参数的实用性。

A transient fuel film model is established by four-stroke gasoline engine as the research object. The recursive least square algorithm is used to identify parameters of the film. The simulation model of engine air-fuel ratio is established. The identified model is used to simulate transient operating conditions which are compared with the actual acquisition of the air-fuel ratio. The results show that identified parameters of the film can meet the requirements of actual control using recursive least squares algorithm.