发明授权
- 专利标题： Air fuel ratio control apparatus having air-fuel ratio control point switching function
- 专利标题（中）： 具有空燃比控制点切换功能的空燃比控制装置
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申请号： US886063申请日： 1997-06-30
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公开(公告)号： US6055972A公开(公告)日： 2000-05-02
- 发明人: Masaya Fujimoto , Minoru Ohta , Makoto Nakae , Isao Watanabe , Naoto Miwa , Hiromi Sano , Masahiro Shibata
- 申请人： Masaya Fujimoto , Minoru Ohta , Makoto Nakae , Isao Watanabe , Naoto Miwa , Hiromi Sano , Masahiro Shibata
- 申请人地址： JPX Kariya
- 专利权人： Denso Corporation
- 当前专利权人： Denso Corporation
- 当前专利权人地址： JPX Kariya
- 优先权： JPX8-174960 19960704; JPX8-209287 19960719; JPX9-168075 19970609
- 主分类号： G01N27/406
- IPC分类号： G01N27/406 ; G01N27/416 ; F02D41/30
摘要：
An air-fuel ratio sensor of a limit current type is used for an air-fuel ratio feedback control. When the air-fuel ratio sensor is in a semi-activated state, the air-fuel ratio sensor is driven into an electromotive force generating mode by a current externally applied thereto thereby to shift an electromotive force changing point so that an air-fuel ratio at which the electromotive force changes stepwisely is shifted from the stoichiometric ratio point to a lean zone. When the air-fuel ratio sensor is in a completely activated state, the air-fuel ratio sensor is applied with a voltage to produce a limit current varying with an air-fuel ratio so that a feedback control is performed based on the advanced control theory by using a linear current output characteristics.
公开/授权文献
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