基于PID的汽油机怠速控制策略

Base on PID Gasoline Engine Idle Control Strategy

汽车用汽油机怠速运行工况十分复杂,从控制理论上讲,怠速过程具有显著的非线性、时变性和不确定性,因而难以建立精确的数学模型。应用PID控制方法对汽油机怠速进行了研究,此方法的显著特点是应用PID控制器对控制目标建立数学模型。为此,应用PID控制的怠速实验结果与开环怠速控制的实验结果进行了对比。结果表明,怠速PID控制方法应用于车用汽油机怠速控制是可行的,而且比开环控制更加有效,并在目前电控汽油机上得到了实际验证。

Automobile uses that the gasoline engine operating condition is very complicated, from the controlling theoretic saying, the idle process has prominent non-linear, time-varying characteristic and uncertainty, so it＇s hard to establish accurate mastics model. The chapter makes a study of gasoline engine by PID control method, whose special character builds mathematical model of control target by PID controller. The chapter compares PID control＇s idle test result with open loop＇s idle control test. The result indicates PID control method is available to the gasoline engine idle, which is more effective than open loop control, and gets practice verification in electrical control gasoline engine.