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    Automotive hydrocarbon sensor system
    46.
    发明公开
    Automotive hydrocarbon sensor system 失效
    用于机动车辆的烃传感器

    公开(公告)号：EP0849587A3

    公开(公告)日：1999-03-17

    申请号：EP97121202.2

    申请日：1997-12-03

    申请人： CORNING INCORPORATED

    发明人： Faber, Margaret Kathleen ,  Xie, Yuming

    IPC分类号： G01N27/16

    CPC分类号： G01N25/30 ,  F01N11/00 ,  F01N2550/02 ,  F01N2560/023 ,  G01N33/0031 ,  G01N33/0047 ,  Y02T10/47

    摘要： A system for measuring the non-methane HC concentration of gas sample, e.g., automotive exhaust gas, comprising first and second catalytic differential calorimetric sensors. The first catalytic differential calorimetric sensor is capable of producing a first output signal representative of the exothermic effect of the oxidation of the predominate oxidizable species (CO+H 2 + non-methane HC combination) in the gas sample. The second catalytic differential calorimetric sensor is capable of producing a second output signal representative of the exothermic effect of the combined oxidation of the CO+H 2 +alkene hydrocarbon species in the gas sample. Lastly, the system includes a means for comparing the first output signal with the second output signal, thereby indicating the total concentration of unburned aromatic and alkane hydrocarbon species in the gas sample which directly correlates to the total non-methane HC concentration. A method carried out by the system comprises the following steps: (a) contacting a first portion of an exhaust gas with a sensor and producing an output signal representative of the concentration of the predominate (CO+H 2 +non-methane HC species) oxidizable species in the exhaust gas; (b) contacting a second portion of the exhaust gas with a second sensor and producing a second output signal representative of the combined concentration of CO+H 2 +alkene hydrocarbon species in the second exhaust gas portion; and (c) determining the aromatic and alkane hydrocarbon species concentration, and thus the total non-methane HC concentration, of the exhaust gas by comparing the first output signal with the second output signal.

    CATALYST DETERIORATION DIAGNOSIS METHOD
    50.
    发明公开
    CATALYST DETERIORATION DIAGNOSIS METHOD 有权
    催化剂衰竭诊断方法

    公开(公告)号：EP3029292A1

    公开(公告)日：2016-06-08

    申请号：EP15197496.1

    申请日：2015-12-02

    申请人： NGK Insulators, Ltd.

    发明人： NAKASONE, Osamu ,  HIRATA, Noriko ,  NAKAYAMA, Yuki

    IPC分类号： F01N3/10 ,  F02D41/02 ,  F01N11/00

    CPC分类号： F01N11/002 ,  F01N3/103 ,  F01N3/106 ,  F01N11/00 ,  F01N2550/02 ,  F01N2560/023 ,  F01N2560/06 ,  F01N2900/1402 ,  F01N2900/1404 ,  F01N2900/1621 ,  F02D41/025 ,  F02D41/0295 ,  F02D41/1441 ,  F02D41/1459 ,  F02D41/22 ,  Y02T10/26 ,  Y02T10/47

    摘要： A method for diagnosing the degree of deterioration of a catalyst disposed in an exhaust path of an internal combustion engine and oxidizing or adsorbing a target gas, including at least one of a hydrocarbon gas and a carbon monoxide gas in an exhaust gas from the internal combustion engine, is adapted to determine whether deterioration exceeding an acceptable level of a catalyst occurs or not by comparing the concentration of a target gas detected downstream from the catalyst in the exhaust path when a diagnosis-gas atmosphere containing a target gas higher in concentration than a target gas during a steady-operation state of the internal combustion engine is intentionally produced and introduced into the catalyst with a threshold value corresponding to the temperature of a catalyst at the timing which the diagnosis-gas atmosphere is introduced.

    摘要翻译： 一种用于诊断设置在内燃机的排气路径中的催化剂的劣化程度并且将来自内燃机的废气中的包括烃气体和一氧化碳气体中的至少一种在内的目标气体氧化或吸附的方法 所述发动机适于通过比较在包含比所述催化剂的浓度高的目标气体的诊断气体气氛的情况下通过比较在所述排气通路中的所述催化剂下游检测到的目标气体的浓度来判断是否发生了超过可接受的催化剂水平的劣化 在内燃机的稳定运行状态期间的目标气体被有意地产生并引入具有与导入诊断气体气氛的时刻的催化剂的温度相对应的阈值的催化剂。