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CN110828863A 一种调整燃料电池汽车电控比例阀控制精准度的方法 有权 转让

一种调整燃料电池汽车电控比例阀控制精准度的方法
摘要：
一种调整燃料电池汽车电控比例阀控制精准度的方法，主要包括以下步骤：S1、建立进入燃料电池的氢气流量Q(x)数学模型，S2、建立Q′(ΔP)物理模型，S3、将Q(x)和Q′(ΔP)输入FCU控制系统中，S4、启动燃料电池，进入扫气阶段，关闭瓶阀，FCU控制系统设定功率请求，对应的获取燃料电池所需的Q(x)值和Q′(ΔP)值，S5、计算S4中FCU控制系统获取的Q(x)值和Q′(ΔP)值的误差值是否符合精度要求，S6、重新确定S1中Q(x)表达式中的系统向量θ，调整电控比例阀的控制精准度，S7、当S6中系统向量θ重新确定后，代入S1中Q(x)表达式内，以得到调整后的Q(x)表达式，并将调整后的Q(x)表达式输入FCU控制系统中，S8、重复S4-S7的操作，直至FCU控制系统获取的Q(x)值和Q′(ΔP)值的误差符合精度要求，即可得到控制精准度高的电控比例阀。
摘要（英）：

The invention discloses a method for adjusting the control accuracy of an electric control proportional valve of a fuel cell vehicle. The method mainly comprises the following steps:S1, establishing amathematical model of hydrogen flow Q (x) entering a fuel cell; S2, establishing a Q '(delta P) physical model; S3, inputting Q (x) and Q '(delta P) into an FCU control system; S4, starting the fuelcell, entering a scavenging stage, closing a cylinder valve, enabling the FCU control system to set a power request, and correspondingly obtaining a Q (x) value and a Q '(delta P) value required by the fuel cell; S5, calculating whether the error value of the Q (x) value and the Q '(delta P) value acquired by the FCU control system in the step S4 meets the precision requirement or not; S6, re-determining a system vector theta in the Q (x) expression in S1, and adjusting the control precision of the electric control proportional valve; S7, after the system vector theta is determined again in the S6, substituting same into the Q (x) expression in S1 to obtain an adjusted Q (x) expression, and inputting the adjusted Q (x) expression into the FCU control system; S8, repeating the operations from S4 to S7 until the error between the Q (x) value and the Q '(delta P) value obtained by the FCU control system meets the precision requirement, so as to obtain the electric control proportional valve with high control precision.

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