用于内燃机的控制装置

Internal combustion engine control device

Abstract

这种控制装置从NOx生成量估计模型,其在吸入气体的氧摩尔浓度的基础上计算NOx生成量,和PM生成量估计模型,其在过量空气系数的基础上计算PM生成量,以EGR比率充当参数的方式获得NOx生成量和PM生成量之间的关系(折衷线)。进一步,控制装置获得这样的直线(比率确定线),所述直线穿过对应于当前操作条件下的NOx生成量和PM生成量的稳定条件适当值的组合的点(适当点A),并且其具有考虑到基于与排放物控制相关的法律的调节值而确定的斜率K。控制装置使用折衷线和比率确定线之间的交叉点(目标点B)作为排放物目标值,并且将EGR比率目标值Regrt设置为对应于目标点B的EGR比率。
This control apparatus obtains a relation (trade-off line) between NOx generation amount and PM generation amount with EGR ratio serving as a parameter from an NOx generation amount estimation model which calculates the NOx generation amount on the basis of the oxygen mole concentration of intake gas and a PM generation amount estimation model which calculates the PM generation amount on the basis of an excess air factor. Further, the control apparatus obtains a straight line (ratio determination line) which passes through a point (appropriate point A) corresponding to a combination of steady-condition appropriate values of the NOx generation amount and the PM generation amount under the present operating conditions and which has a slope K determined in consideration of a regulation value based on a law relating to emission control. The control apparatus uses an intersection (target point B) between the trade-off line and the ratio determination line as an emission target value, and sets an EGR ratio target value Regrt to an EGR ratio corresponding to the target point B.

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Cited By (3)

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    CN-101994588-AMarch 30, 2011通用汽车环球科技运作公司使用氮氧化物传感器的诊断系统和方法
    CN-103195594-AJuly 10, 2013北京理工大学Exhaust gas recirculation (EGR) control method and control system of diesel engine and based on excess air coefficient
    CN-103195594-BMay 27, 2015北京理工大学基于过量空气系数的柴油机egr控制方法及控制系统