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    • 4. 发明授权
    • Oxygen concentration sensing device for an air-fuel ratio control system
of an automotive internal combustion engine
    • 用于汽车内燃机的空燃比控制系统的氧浓度检测装置
    • US4706637A
    • 1987-11-17
    • US843951
    • 1986-03-25
    • Masahiko AsakuraTomohiko KawanabeNoritaka KushidaHiroshi Hasebe
    • Masahiko AsakuraTomohiko KawanabeNoritaka KushidaHiroshi Hasebe
    • G01N27/419F02D41/14G01N27/406G01N27/407G01N27/409G01N27/413G01N27/417F02M23/06F02M23/08
    • G01N27/417G01N27/4065
    • An oxygen concentration sensing device for use in an air-fuel ratio control system of an internal combustion engine includes a pair of solid electrolyte members having oxygen ion permeability which are disposed in the exhaust gas of the engine and arranged to face each other forming a predetermined gap portion between them. Each of the solid electrolyte members is provided with a pair of electrodes. One of the solid electrolyte members is operative as an oxygen pump element when a predetermined constant electric current is supplied across the electrodes thereof. An electric potential developed across the electrodes of the other one of the solid electrolyte members operative as a cell element is supplied to a comparing means in which the input signal from the solid electrolyte member is compared with a predetermined reference potential and a result of comparison is provided as an oxygen concentration detection signal. In an application of the oxygen concentration sensing device according to the invention in an air-fuel ratio control system, the magnitude of the constant current supplied to the oxygen pump element is varied with the value of a target air-fuel ratio which is controlled in response to various operational parameters of the engine.
    • 用于内燃机的空燃比控制系统的氧浓度检测装置包括一对具有氧离子渗透性的固体电解质构件,其设置在发动机的排气中并相对于彼此相对配置,形成预定的 它们之间的间隙部分。 每个固体电解质构件设置有一对电极。 当在其电极之间提供预定的恒定电流时,固体电解质构件中的一个作为氧气泵元件工作。 将作为电池元件操作的另一个固体电解质构件的电极上的电位产生的电位被提供给比较装置,其中来自固体电解质构件的输入信号与预定的参考电位进行比较,并且比较结果为 作为氧浓度检测信号提供。 在根据本发明的氧浓度检测装置在空燃比控制系统中的应用中,供给氧泵元件的恒定电流的大小随着目标空燃比的值而变化 响应发动机的各种操作参数。