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    • 42. 发明授权
    • Air-fuel ratio controlling apparatus for internal combustion engine
    • 用于内燃机的空燃比控制装置
    • US4499880A
    • 1985-02-19
    • US439878
    • 1982-11-08
    • Masayuki MikiSeikou SuzukiTakao Sasayama
    • Masayuki MikiSeikou SuzukiTakao Sasayama
    • F02D35/00F02D41/14F02M7/18G01N27/406G01N27/407G01N27/417G05D11/13
    • G01N27/417F02D41/1476G01N27/4065
    • An air-fuel ratio controlling apparatus for internal combustion engines including an oxygen sensor of hermetic type is disclosed. A pump cell of the oxygen sensor is connected with a power supply through a switch circuit for switching the direction of current flow. A control unit computes a setting of oxygen concentration of a reference gas layer of an exhaust gas sensor in accordance with the operating parameters. By a setting interruption, the control unit switches the switch circuit toward exhausting direction, drives the power supply and applies the exhaust current to the pump cell. The completion of exhaustion is detected, the switch circuit is switched to the suction, and the power supply is driven to apply the suction current to the pump cell. The setting is compared with the integration value of the suction current by a comparator circuit, or the suction current is fixed to control the drive time of the power supply. Alternatively, the current corresponding to the setting is applied for a predetermined time thereby to set the oxygen concentration of the reference gas layer to a setting in accordance with the operating parameters of the engine.
    • 公开了一种包括密封型氧传感器的内燃机的空燃比控制装置。 氧传感器的泵电池通过用于切换电流方向的开关电路与电源连接。 控制单元根据操作参数来计算废气传感器的参考气体层的氧浓度的设定。 通过设置中断,控制单元将开关电路切换到排气方向,驱动电源并将排气电流施加到泵室。 检测到耗尽的完成,开关电路切换到吸力,驱动电源将吸入电流施加到泵室。 将该设置与比较器电路的吸入电流的积分值进行比较,或者固定吸入电流以控制电源的驱动时间。 或者,将与设定相对应的电流施加预定时间,由此将基准气体层的氧浓度设定为与发动机的运转参数相应的设定值。