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    • 8. 发明申请
    • METHOD FOR MONITORING A POLLUTANT CONVERSION CAPACITY IN AN EXHAUST GAS AFTERTREATMENT SYSTEM
    • 在排气系统中监测污染物转化能力的方法
    • US20110146239A1
    • 2011-06-23
    • US12974941
    • 2010-12-21
    • Torsten HandlerTobias Pfister
    • Torsten HandlerTobias Pfister
    • F01N11/00
    • F01N11/00Y02T10/47
    • The present invention relates to a method for monitoring a pollutant conversion capacity of a catalytically coated, oxidizing exhaust gas aftertreatment component (29) in an exhaust gas system (13) of an internal combustion engine (15). A nitrogen oxide sensor (31, 32) is disposed in each case in the flow path of the exhaust gas upstream of and downstream of the oxidizing exhaust gas aftertreatment component (29), a capacity of said oxidizing exhaust gas aftertreatment component (29) for converting NO to NO2 being ascertained from a comparison of the two signals (Z′, Z″) of the nitrogen oxide sensors (31, 32). Additional independent claims relate to an open-loop and/or closed-loop control device (17), a computer program and a computer program product.
    • 本发明涉及一种用于监测内燃机(15)的排气系统(13)中的催化涂覆的氧化废气后处理部件(29)的污染物转化能力的方法。 在氧化废气后处理部件(29)的上游侧和下游侧的废气流路中,分别设置氮氧化物传感器(31,32),所述氧化废气后处理部件(29)的容量为 根据氮氧化物传感器(31,32)的两个信号(Z',Z“)的比较来确定NO转换为NO2。 附加独立权利要求涉及开环和/或闭环控制装置(17),计算机程序和计算机程序产品。
    • 9. 发明申请
    • Diagnostic method for catalytic converters
    • 催化转化器诊断方法
    • US20060225492A1
    • 2006-10-12
    • US11378796
    • 2006-03-16
    • Tobias Pfister
    • Tobias Pfister
    • G01M19/00
    • F01N11/002F01N2900/0422F02D41/1445Y02T10/47
    • A diagnostic method for catalytic converters includes the steps: repeated measurement of an actual temperature downstream from a catalytic converter volume, repeated calculation of a first model temperature on the basis of a first temperature model, and evaluation of a conversion capability of the catalytic converter volume on the basis of a first difference which is a function of the actual temperature and the first model temperature. The method is characterized in that a second model temperature is additionally calculated on the basis of a second temperature model, a second difference is formed which is a function of the second model temperature and the first model temperature, and the conversion capability is evaluated on the basis of a value which is a function of the first difference, this value being normalized to a value which is a function of the second difference.
    • 催化转化器的诊断方法包括以下步骤:重复测量催化转化器体积下游的实际温度,基于第一温度模型重复计算第一模型温度,以及评估催化转化器体积的转化能力 基于作为实际温度和第一模型温度的函数的第一差异。 该方法的特征在于,基于第二温度模型另外计算第二模型温度,形成第二模型温度与第二模型温度和第一模型温度的函数关系,并且在 作为第一差的函数的值的基础,该值被归一化为作为第二差的函数的值。
    • 10. 发明授权
    • Method for operating an exhaust gas aftertreatment apparatus
    • 操作排气后处理装置的方法
    • US09057335B2
    • 2015-06-16
    • US12892530
    • 2010-09-28
    • Andreas EckertHerbert SchoemigTobias Pfister
    • Andreas EckertHerbert SchoemigTobias Pfister
    • F01N3/18F02D41/02F01N3/10F02D41/14F02D41/40F01N13/00F01N3/035F01N3/20
    • F02D41/0235F01N3/035F01N3/106F01N3/2066F01N13/009F02D41/0255F02D41/1446F02D41/405F02D2200/0614Y02T10/44
    • The present invention relates to a method for operating an exhaust gas aftertreatment apparatus (13) of an internal combustion engine (11), which comprises an oxidation catalytic converter (29), an SCR catalytic converter (35) and a first temperature sensor (32) disposed in the direction of flow downstream of the oxidation catalytic converter (29) and upstream of the SCR catalytic converter (35), an exhaust gas atmosphere capable of exothermal reaction in said oxidation catalytic converter (29) being generated by the metering of hydrocarbons into the exhaust gas (3) upstream of said oxidation catalytic converter (29) during a heating operation. The method is thereby characterized in that a first numerical measurement value of a nominal value of a hydrocarbon conversion in said oxidation catalytic converter (29) is formed, in that a second numerical measurement value of an actual value of the hydrocarbon conversion in said oxidation catalytic converter (29) is determined as a function of the signals of the first temperature sensor (32), in that the second numerical measurement value is compared with the first numerical measurement value and in that the metering of the hydrocarbons is reduced if said second numerical measurement value is smaller than said first numerical measurement value. An independent claim relates to a control device set up for carrying out the method.
    • 本发明涉及一种用于操作内燃机(11)的废气后处理装置(13)的方法,其包括氧化催化转化器(29),SCR催化转化器(35)和第一温度传感器(32) )设置在氧化催化转化器(29)下游和SCR催化转化器(35)的上游的方向上,在所述氧化催化转化器(29)中能够发生放热反应的废气气氛是通过计量烃 在加热操作期间,进入所述氧化催化转化器(29)上游的废气(3)。 该方法的特征在于,形成所述氧化催化转化器(29)中的烃转化率的标称值的第一数值测定值,其特征在于,所述氧化催化剂中的烃转化率的实际值的第二数值测定值 转换器(29)被确定为第一温度传感器(32)的信号的函数,其中第二数值测量值与第一数值测量值进行比较,并且如果所述第二数值测量值 测量值小于所述第一数值测量值。 独立权利要求涉及设置用于执行该方法的控制装置。