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    • 5. 发明授权
    • Air-fuel ratio controller of internal combustion engine
    • 内燃机空燃比控制器
    • US4911130A
    • 1990-03-27
    • US322339
    • 1989-03-10
    • Toshihisa TakahashiMasanobu UchinamiRyoji NishiyamaSeiya KominamiShinichi Nishida
    • Toshihisa TakahashiMasanobu UchinamiRyoji NishiyamaSeiya KominamiShinichi Nishida
    • G01N27/409F02D41/00F02D41/14G01N27/04
    • F02D41/1494F02D41/1491
    • An air-fuel (A/F) controller of an internal combustion engine, which computes an average value of a plurality of duty ratios of the voltage supplied to the heater according to the engine speed and the engine load periodically detected during a period from a predetermined moment up to the present, and fixes said average value as the present duty ratio of the voltage to be supplied to the heater, since the A/F ratio sensor is heated not only by the heater but also by exhaust gas. The A/F ratio controller smoothes the variation of voltage to be supplied to the heater by applying the computed average value as the present duty ratio of the supply voltage which is to be supplied to the heater. Accordingly, even when the driving condition is in high-speed, variation of the temperature borne by the heater is mild and smooth, and thus, the temperature of the oxygen-concentration detecting element does not rise suddenly. Furthermore, the A/F ratio controller corrects the above-mentioned present duty ratio of the voltage to be supplied to the heater according to the supply voltage to be supplied to the heater.
    • 一种内燃机的空燃料(A / F)控制器,其根据发动机转速和在从一燃料发动机的时间段周期性地检测到的发动机负荷来计算提供给加热器的电压的多个占空比的平均值 并且将所述平均值固定为要供给到加热器的电压的当前占空比,因为A / F比传感器不仅由加热器而且被排气加热。 A / F比率控制器通过将计算的平均值作为要供给到加热器的电源电压的当前占空比来平滑要提供给加热器的电压的变化。 因此,即使在驱动条件高速的情况下,由加热器承受的温度变化也温和平滑,因此氧浓度检测元件的温度不会突然上升。 此外,A / F比率控制器根据供给到加热器的供给电压来校正上述提供给加热器的电压的占空比。