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    • 1. 发明授权
    • Method for the diagnosis of the EGR cooler efficiency in a diesel engine
    • 柴油发动机EGR冷却器效率的诊断方法
    • US08386204B2
    • 2013-02-26
    • US12877924
    • 2010-09-08
    • Francesco CianfloneMorena BrunoNando Vennettilli
    • Francesco CianfloneMorena BrunoNando Vennettilli
    • G01K15/00G01K19/00
    • 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 test is 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,该方法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; 一组改进的残差的计算(& t; 0):∈N⁡(&Thetas; 0)= 1NΣk = 1 N(⁡⁡(&Thetas; 0,xk,yk)-h 0) 其中N是进行诊断测试的样本数; 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。
    • 5. 发明申请
    • METHOD FOR ESTIMATING THE HEAT EXCHANGE RATE RELATED TO EXOTHERMIC OXIDATION REACTIONS OF A DIESEL OXIDATION CATALYTIC CONVERTER IN AN INTERNAL COMBUSTION ENGINE
    • 用于评估内燃机中柴油氧化催化转化器的过热氧化反应的热交换速率的方法
    • US20120053912A1
    • 2012-03-01
    • US13202844
    • 2010-02-22
    • Francesco CianfloneRoberto Vernassa
    • Francesco CianfloneRoberto Vernassa
    • G06F17/10
    • F01N11/002F01N9/005F01N2550/02F01N2900/14F01N2900/1602F01N2900/1631Y02T10/47
    • A method is provided for estimating the heat exchange rate related to the exothermic oxidation reactions of a catalytic converter in an internal combustion engine. Exhaust gases flow through the catalytic converter, the method includes, but is not limited to providing a thermal model of a catalytic converter where no oxidation reactions take place. The thermal model includes, but is not limited to equations that take into account the heat exchange rate related to the processes between the exhaust gases, the catalytic converter and an external environment surrounding the catalytic converter, calculating an estimated outlet temperature at the outlet of the catalytic converter, based on the thermal model, measuring an outlet temperature at the outlet of the catalytic converter comparing the estimated outlet temperature with the measured outlet temperature, thus obtaining a correction factor, correcting the thermal model by using the correction factor in order to make the estimated outlet temperature converge to the measured outlet temperature, estimating the heat exchange rate related to the exothermic oxidation reactions as the correction factor.
    • 提供了一种用于估计与内燃机中的催化转化器的放热氧化反应有关的热交换率的方法。 废气流过催化转化器,该方法包括但不限于提供不发生氧化反应的催化转化器的热模型。 热模型包括但不限于考虑与废气,催化转化器和催化转化器周围的外部环境之间的过程相关的热交换率的方程式,计算出口处的出口温度 催化转化器,基于热模型,测量催化转化器出口处的出口温度,将估计的出口温度与测量出口温度进行比较,从而获得校正因子,通过使用校正因子校正热模型,以使 估计出口温度收敛于测量的出口温度,估计与放热氧化反应相关的热交换率作为校正因子。