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    • 6. 发明申请
    • METHOD FOR THE DIAGNOSIS OF THE EGR COOLER EFFICIENCY IN A DIESEL ENGINE
    • 用于诊断柴油发动机中的EGR冷却器效率的方法
    • US20110224948A1
    • 2011-09-15
    • US12877924
    • 2010-09-08
    • Francesco CIANFLONEMorena BRUNONando VENNETTILLI
    • Francesco CIANFLONEMorena BRUNONando VENNETTILLI
    • G06F15/00
    • F02M26/33
    • A method is provided for the diagnosis of the EGR cooler efficiency in a Diesel engine that includes but is not limited to construction of a model for determining the temperature drop y=ΔT in the EGR cooler, the model having a parameter vector θ and an input vector x; performing a model calibration phase in order to estimate the bias h0 of the system; calculation of a set of primary residuals ε(θ0, x, ΔT), staffing from the model equation and using the results of the calibration phase; calculation of a set of improved residuals εN(θ0): ɛ N  ( θ 0 ) = 1 N  ∑ k = 1 N  ( ɛ  ( θ 0 , x k , y k ) - h 0 ) where N is the number of samples on which the diagnostic testis performed; calculation of a diagnostic index S: S=εTNR0−1εN and, use of the diagnostic index S in order to diagnose the efficiency of the EGR cooler.
    • 提供了一种用于诊断柴油发动机中的EGR冷却器效率的方法,其包括但不限于用于确定EGR冷却器中的温度下降y =&Dgr; T的模型的结构,该模型具有参数矢量& 和输入向量x; 执行模型校准阶段以估计系统的偏差h0; 计算一组原始残差(& t; 0,x,&Dgr; T),从模型方程组成员,并使用校准阶段的结果; (&Thetas; 0)= 1NΣΣ= 1 Nɛ(ɛas;;; - - - h))))))))))))))))))))))))))))))))) 其中N是诊断睾丸进行的样本数; 计算诊断指标S:S =&egr; TNR0-1&egr N,并使用诊断指数S来诊断EGR冷却器的效率。