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    • 2. 发明授权
    • Oxygen sensor control apparatus
    • 氧传感器控制装置
    • US08959988B2
    • 2015-02-24
    • US13531203
    • 2012-06-22
    • Hiroshi InagakiKentaro Mori
    • Hiroshi InagakiKentaro Mori
    • G01N27/419G01N27/409
    • G01N27/409F01N2560/025
    • In an oxygen sensor control apparatus, a CPU obtains a correction coefficient for calibrating the relation between output value of an oxygen sensor and oxygen concentration when a fuel cut operation is performed. When the amount of scavenging air (total supply amount of air) becomes equal to or greater than a predetermined amount in each fuel cut period, the CPU calculates an average output value Ipav from a plurality of output values (concentration corresponding values) Ipr of the oxygen sensor, from which values deviating from a predetermined range R1 have been removed. Subsequently, the CPU averages the values obtained in a plurality of fuel cut periods to thereby obtain a plural-time average output value Ipavf. The CPU obtains a correction coefficient for correcting the actual output value Ip of the oxygen sensor 20 on the basis of the Ipavf value and a previously set reference output value.
    • 在氧传感器控制装置中,CPU执行校正氧传感器的输出值与进行燃料切断动作时的氧浓度之间的关系的校正系数。 当每个燃料切断期间的清扫空气量(总空气供给量)变为规定量以上时,CPU从多个输出值(浓度对应值)Ipr计算平均输出值Ipav 氧传感器,从其偏离预定范围R1的值已被去除。 随后,CPU对在多个燃料切断时段中获得的值进行平均,从而获得多次平均输出值Ipavf。 CPU根据Ipavf值和预先设定的基准输出值,求出校正氧传感器20的实际输出值Ip的校正系数。