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    • 7. 发明申请
    • CATALYST MONITORING USING EGO SENSORS
    • 使用EGO传感器进行催化监测
    • WO1993003358A1
    • 1993-02-18
    • PCT/EP1992001728
    • 1992-07-30
    • FORD MOTOR COMPANYFORD MOTOR COMPANY OF CANADA LTD.FORD WERKE A.G.FORD FRANCE S.A.FORD MOTOR COMPANY LIMITED
    • FORD MOTOR COMPANYFORD MOTOR COMPANY OF CANADA LTD.FORD WERKE A.G.FORD FRANCE S.A.FORD MOTOR COMPANY LIMITEDKOTWICKI, Allan, JosephHAMBURG, Douglas, Ray
    • G01N27/416
    • F01N11/007F01N2550/02Y02A50/2324Y02T10/22Y02T10/47
    • A method of monitoring, while on board an automotive vehicle, one or more of catalyst performance, engine misfire, and combustion quality, the vehicle having an internal combustion engine (13) equipped with a catalyst (21) for converting noxious emissions of the engine, comprising: (i) exposing at least one pair of EGO sensors to (55, 56, 59, 60) substantially the same emissions either exiting from the engine or from the catalyst, one (55) of the EGO sensors having its electrode highly catalytic, and the other sensor (56) having its electrode low-to-noncatalytic; (ii) comparing the outputs of the sensor electrodes (amplitude, frequency, or phase shift) to determine if there is a sufficient differential to indicate a misfire or poor combustion in the case of the sensors being located downstream of the engine exhaust but upstream of the catalyst, or indicating poor catalyst efficiency in the case of the sensors being placed substantially immediately downstream of the catalyst. Two pairs of sensors (55, 56, 59, 60) may be used, a first pair being placed substantially immediately downstream of the catalyst, the pairs of EGO sensors being incorporated into a closed-loop feedback control of the engine fuel control system.
    • 一种在车载机上进行催化剂性能,发动机失火和燃烧质量中的一种或多种的方法,所述车辆具有内燃机(13),所述内燃机配备有用于转换发动机的有害排放物的催化剂(21) 包括:(i)将至少一对EGO传感器暴露于(55,56,59,60)从发动机或从催化剂中排出的基本相同的排放物,一个(55)的EGO传感器具有高度的电极 并且其另一个传感器(56)具有其低至非催化的电极; (ii)比较传感器电极的输出(振幅,频率或相移)以确定在传感器位于发动机排气下游的情况下是否存在足够的差异以指示发动机失火或燃烧不良 催化剂,或者在传感器基本上立即放置在催化剂的下游的情况下表明催化剂效率差。 可以使用两对传感器(55,56,59,60),第一对基本上立即放置在催化剂的下游,所述EGO传感器对被并入到发动机燃料控制系统的闭环反馈控制中。