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    • 5. 发明授权
    • Apparatus for controlling heater for heating oxygen sensor
    • 用于控制加热器用于加热氧气传感器的装置
    • US5214267A
    • 1993-05-25
    • US625897
    • 1990-12-11
    • Kouichi HoshiMakoto Suzuki
    • Kouichi HoshiMakoto Suzuki
    • G01N27/409F02D41/14G01N27/04G01N27/12G01N27/406G05D23/24
    • F02D41/1494G01N27/4067G05D23/2401
    • An apparatus for controlling a heater for heating an oxygen sensor provided in an exhaust gas flow passage of an internal combustion engine disposed in an automotive vehicle, includes an operating condition detecting unit for detecting a predetermined operating condition of the internal combustion engine, and a resistance/power detection unit for detecting a heater resistance value of the heater and an amount of power supplied to the heater when the internal combustion engine is in the predetermined operating condition. The apparatus also includes a power control unit for comparing the heater resistance value detected by the resistance/power detection unit with a target resistance value and for supplying the heater with power supplied from a battery in a definite-resistance control mode in which the heater resistance value is controlled to become equal to the target resistance value, a resistance value correction unit for correcting the target resistance value so that a difference between the amount of power detected by the resistance/power detection unit and a standard amount of power becomes equal to zero, and a storage unit for storing the target resistance value corrected by the resistance value correction unit as a learning value. Further, the apparatus includes a storage state judgment unit for judging whether or not the the learning value is correctly stored in the storage unit, and a stop unit for stopping the power control unit to supply the heater with power in the definite-resistance control mode.
    • 一种用于加热设置在机动车辆中的内燃机的排气流路中的用于加热氧传感器的加热器的装置,包括用于检测内燃机的预定运行状态的运行状态检测单元和电阻 /功率检测单元,用于检测加热器的加热器电阻值,以及当内燃机处于预定操作状态时供应给加热器的功率量。 该装置还包括功率控制单元,用于将由电阻/功率检测单元检测到的加热器电阻值与目标电阻值进行比较,并且以一定电阻控制模式向加热器提供从电池供应的电力,其中加热器电阻 值被控制为等于目标电阻值;电阻值校正单元,用于校正目标电阻值,使得由电阻/功率检测单元检测到的功率量与标准功率量之间的差变为零 以及存储单元,用于存储由电阻值校正单元校正的目标电阻值作为学习值。 此外,该装置包括:存储状态判断单元,用于判断学习值是否正确存储在存储单元中;以及停止单元,用于停止功率控制单元向加热器提供具有定电阻控制模式的功率 。