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    • 6. 发明授权
    • Engine air-fuel ratio control apparatus
    • 发动机空燃比控制装置
    • US4676213A
    • 1987-06-30
    • US911784
    • 1986-09-26
    • Takayuki ItsujiSadayasu Ueno
    • Takayuki ItsujiSadayasu Ueno
    • G01N27/26F02D33/00F02D41/00F02D41/02F02D41/14F02D41/32G01N27/409F02B3/00
    • F02D41/1474F02D41/1476F02D41/1456
    • An air-fuel ratio control apparatus is disclosed in which an air-fuel ratio sensor disposed in the exhaust system of an internal combustion engine produces a voltage signal correlated with the excess air ratio of the ambient gas surrounding it and has such an output characteristic as to produce a maximum output only when the ambient gas is filled with air, the air-fuel ratio of the internal combustion engine being controlled to a proper value on the basis of the detection signal of the air-fuel ratio sensor. The air-fuel ratio control apparatus further comprises a sampling device for sampling the maximum output (V.sub.x) when it is decided that the output of the air-fuel ratio sensor is maintained for a predetermined length of time or longer at a predetermined value or higher, a memory for storing the sample value of the maximum output (V.sub.x) produced by the sampling device and updating the preceding sample value (V.sub.x-1) to the present sample value (V.sub.x) when a new maximum output is sampled each time of the decision, and a calibrator for calibrating the output characteristic of the air-fuel ratio sensor on the basis of the latest updated sample value (V.sub.x).
    • 公开了一种空燃比控制装置,其中设置在内燃机的排气系统中的空燃比传感器产生与其周围的环境气体的过量空气比相关的电压信号,并具有如下的输出特性: 仅当环境气体充满空气时才产生最大输出,基于空燃比传感器的检测信号,将内燃机的空燃比控制在适当的值。 空燃比控制装置还包括:当确定空燃比传感器的输出在预定值或更长时间内保持预定时间长或更长时,对采样装置进行采样最大输出(Vx) 存储器,用于存储由采样装置产生的最大输出(Vx)的采样值,并且当每次采样新的最大输出时,将先前的采样值(Vx-1)更新为当前采样值(Vx) 决定和校准器,用于根据最新更新的采样值(Vx)来校准空燃比传感器的输出特性。
    • 10. 发明授权
    • Air-fuel ratio control apparatus for internal combustion engines
    • 用于内燃机的空燃比控制装置
    • US4944274A
    • 1990-07-31
    • US417075
    • 1989-10-04
    • Takayuki ItsujiSadayasu UenoNorio Ichikawa
    • Takayuki ItsujiSadayasu UenoNorio Ichikawa
    • G01N27/26F02D41/14F02D45/00G01N27/406G01N27/41
    • F02D41/1494F02D41/1476G01N27/4065
    • An air-fuel ratio control apparatus for an internal combustion engine includes a solid electrolyte having a first electrode disposed on one surface thereof to contact with the atmosphere and a second electrode disposed on the other surface thereof to contact with the exhaust gas from the engine through a diffusing resistor, and means for applying a voltage across the first and second electrodes to detect an oxygen pump current flowing in the solid electrolyte whereby a correction factor relating to a change in the diffusion coefficient of the diffusing resistor is computed so that the oxygen pump current detected by the detecting means is corrected in accordance with the correction factor and the air-fuel ratio of the exhaust gas is determined in accordance with the corrected oxygen pump current, thereby controlling the quantity of fuel supplied to the engine in accordance with the determined air-fuel ratio.
    • 一种用于内燃机的空燃比控制装置,具有固体电解质,该固体电解质具有设置在其一表面上的与大气接触的第一电极和设置在其另一表面上的第二电极,以与来自发动机的废气接触 扩散电阻器,以及用于在第一和第二电极上施加电压以检测在固体电解质中流动的氧泵电流的装置,由此计算与扩散电阻器的扩散系数的变化有关的校正因子,使得氧气泵 根据校正因子来校正由检测装置检测到的电流,并且根据校正的氧泵电流来确定排气的空燃比,从而根据所确定的氧气泵来控制供给到发动机的燃料量 空燃比。