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    CATALYST MONITORING USING EGO SENSORS
    2.
    发明申请
    CATALYST MONITORING USING EGO SENSORS 审中-公开
    使用EGO传感器进行催化监测

    公开(公告)号：WO1993003358A1

    公开(公告)日：1993-02-18

    申请号：PCT/EP1992001728

    申请日：1992-07-30

    Applicant: FORD MOTOR COMPANY ,  FORD MOTOR COMPANY OF CANADA LTD. ,  FORD WERKE A.G. ,  FORD FRANCE S.A. ,  FORD MOTOR COMPANY LIMITED

    Inventor： FORD MOTOR COMPANY ,  FORD MOTOR COMPANY OF CANADA LTD. ,  FORD WERKE A.G. ,  FORD FRANCE S.A. ,  FORD MOTOR COMPANY LIMITED ,  KOTWICKI, Allan, Joseph ,  HAMBURG, Douglas, Ray

    IPC: G01N27/416

    CPC classification number: F01N11/007 ,  F01N2550/02 ,  Y02A50/2324 ,  Y02T10/22 ,  Y02T10/47

    Abstract: 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.

    Abstract translation: 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。

    SYSTEM AND METHOD FOR CONTROLLING NOXIOUS COMPONENTS IN AUTOMOTIVE EMISSIONS
    3.
    发明申请
    SYSTEM AND METHOD FOR CONTROLLING NOXIOUS COMPONENTS IN AUTOMOTIVE EMISSIONS 审中-公开
    用于控制汽车排放中的有毒成分的系统和方法

    公开(公告)号：WO1995018299A1

    公开(公告)日：1995-07-06

    申请号：PCT/GB1994002715

    申请日：1994-12-12

    Applicant: FORD MOTOR COMPANY LIMITED ,  FORD WERKE A.G. ,  FORD FRANCE S.A. ,  FORD MOTOR COMPANY OF CANADA LTD. ,  FORD MOTOR COMPANY

    Inventor： FORD MOTOR COMPANY LIMITED ,  FORD WERKE A.G. ,  FORD FRANCE S.A. ,  FORD MOTOR COMPANY OF CANADA LTD. ,  FORD MOTOR COMPANY ,  WILLEY, Raymond, Lawrence ,  MCCABE, Robert, Walter ,  HEPBURN, Jeffrey, Scott

    IPC: F02D41/14

    CPC classification number: F02D41/0027 ,  B01D53/94 ,  B01D53/9445 ,  B01D53/9495 ,  F01N3/20 ,  F01N13/009 ,  F01N13/011 ,  F01N2570/00 ,  F02D19/023 ,  F02M21/0215 ,  Y02T10/22

    Abstract: The invention relates to an improved emission control system. The system has particular applicability for use in an internal combustion engine (10) utilising alternative fuels such as natural gas. More particularly, the invention provides an apparatus and method wherein hydrogen is removed by a conditioning catalyst (16) from the exhaust gas stream (21) to produce a conditioned exhaust gas (22). An exhaust gas oxygen (EGO) sensor (18) is in communication with the conditioned exhaust gas (22) and generates a signal in response to the sensed oxygen concentration of the conditioned exhaust gas (22). The A/F mixture entering engine (10) is adjusted by closed loop control means (14) in response to the signal generated by EGO sensor (18). The removal of hydrogen from the exhaust gas stream (21) eliminates lean shifts and allows oxygen sensor (18) and closed loop control means (14) to more accurately control the A/F ratio. As a result of improved control over the A/F mixture entering engine (10), main three-way catalyst (20) optimally converts noxious components present in the conditioned exhaust gas (22) to produce a purified exhaust stream (23).

    Abstract translation: 本发明涉及一种改进的排放控制系统。 该系统特别适用于使用诸如天然气的替代燃料的内燃机（10）。 更具体地，本发明提供了一种装置和方法，其中通过调节催化剂（16）从废气流（21）除去氢气以产生调节废气（22）。 废气氧（EGO）传感器（18）与经调节的废气（22）连通，并响应于感测到的经调节废气（22）的氧气浓度产生信号。 响应于由EGO传感器（18）产生的信号，进入发动机（10）的A / F混合器由闭环控制装置（14）调节。 从排气流（21）去除氢消除了贫偏移，并允许氧传感器（18）和闭环控制装置（14）更准确地控制A / F比。 作为进入发动机（10）的A / F混合物的改进控制的结果，主要三元催化剂（20）最佳地转化存在于调节废气（22）中的有害成分以产生净化的废气流（23）。

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