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    • 9. 发明申请
    • Control Apparatus for Internal Combustion Engine
    • 内燃机控制装置
    • US20070255484A1
    • 2007-11-01
    • US11628494
    • 2005-09-13
    • Daichi ImaiShigeki NakayamaTakao Fukuma
    • Daichi ImaiShigeki NakayamaTakao Fukuma
    • F02D28/00
    • F02D41/0072F02B29/0406F02B2275/14F02D41/0007F02D41/1462F02D2041/0017F02M26/05F02M26/23F02M26/46F02M26/47Y02T10/123Y02T10/144Y02T10/47
    • 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.
    • 该控制装置从NOx生成量估计模型获得NOx生成量与PM生成量之间的关系(权衡关系),其中,EGR比用作为参数的EGR率,该NOx生成量估计模型基于进气的氧摩尔浓度计算NOx生成量 气体和PM生成量估计模型,其根据过量空气系数计算PM生成量。 此外,控制装置获得通过与当前运行条件下的NOx生成量的稳定值适当值和PM生成量的组合对应的点(适当点A)的直线(比例判定线),以及 其具有考虑到基于与排放控制有关的规则的调节值而确定的坡度K. 控制装置使用权衡线和比例判定线之间的交点(目标点B)作为排放目标值,并将EGR率目标值Regrt设定为与目标点B对应的EGR率。