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    • 10. 发明授权
    • Exhaust gas purifying apparatus and control method therefor
    • 废气净化装置及其控制方法
    • US06216452B1
    • 2001-04-17
    • US09298987
    • 1999-04-26
    • Isao NaitoKazuo Oosumi
    • Isao NaitoKazuo Oosumi
    • F02M2506
    • F02D21/08F02M26/15F02M26/48
    • An exhaust gas purifying apparatus provides a reflux pipe for connecting an intake pipe to an exhaust pipe and an EGR valve disposed in the reflux pipe for adjusting a flow rate of the exhaust gas flowing through the reflux pipe. A nitrogen oxide purifying catalyst section is formed by a brown miralite type composite oxide. A pair of electrodes are provided on the vicinity of the opposite ends of the purifying catalyst section. A conductivity measuring section measures conductivity of a nitrogen oxide catalyst of the nitrogen oxide purifying catalyst section through the electrodes. A control section controls an opening degree of the EGR valve on the basis of engine rpm, engine load and the conductivity measured in the conductivity measuring section.
    • 排气净化装置提供用于将进气管连接到排气管的回流管和设置在回流管中的EGR阀,用于调节流过回流管的排气的流量。 氮氧化物净化催化剂部分由棕色的堇青石型复合氧化物形成。 在净化催化剂部分的相对端附近设置一对电极。 电导率测定部测定通过电极的氮氧化物净化催化剂部的氮氧化物催化剂的导电率。 控制部根据发动机转数,发动机负荷和电导率测定部测定的电导率来控制EGR阀的开度。