公开(公告)号：US4891122A

公开(公告)日：1990-01-02

申请号：US933850

申请日：1986-11-24

申请人： Yoshiaki Danno ,  Takashi Dogahara

发明人： Yoshiaki Danno ,  Takashi Dogahara

IPC分类号： G01N27/419 ,  F02D41/00 ,  F02D41/14 ,  G01N27/406 ,  G01N27/409 ,  G01N27/416 ,  G01N27/417

CPC分类号： G01N27/417 ,  G01N27/4065

摘要： The invention provides a device for detecting an air fuel ratio of an air fuel mixture supplied to the combustion apparatus of an internal combustion engine. The device comprises a sensor cell for developing an electric signal in response to the difference between the concentration of oxygen an exhaust gas and the concentration of oxygen in a reference gas, a controlling means for developing an electric control signal having a polarity determined from an output of the sensor cell, a pump cell for moving oxygen ions in response to an electric control signal received from the controlling means, a control current detecting means for detecting control current flow between the controlling means and the pump cell, an air fuel ratio detecting means for detecting the air fuel ratio from the control current flow, and a stoichiometric air fuel ratio detecting means for detecting the direction of the control current flow so as to determine the stoichiometric air fuel ratio.

摘要翻译： 本发明提供了一种用于检测供应到内燃机的燃烧装置的空气燃料混合物的空燃比的装置。 该装置包括用于响应于废气中的氧气浓度与参考气体中的氧浓度之间的差异而发展电信号的传感器单元，用于开发具有从输出端确定的极性的电控制信号的控制装置 传感器单元的响应于从控制装置接收到的电控信号移动氧离子的泵室;控制电流检测装置，用于检测控制装置和泵室之间的控制电流;空燃比检测装置 用于检测来自控制电流的空燃比，以及化学计量空燃比检测装置，用于检测控制电流的方向，以便确定理论空燃比。