发明授权
- 专利标题： Apparatus and method for controlling air-to-fuel ratio in engine
- 专利标题（中）： 用于控制发动机空燃比的装置和方法
-
申请号： US09592852申请日： 2000-06-12
-
公开(公告)号： US06324836B1公开(公告)日： 2001-12-04
- 发明人: Shinji Nakagawa , Toshio Ishii , Yutaka Takaku , Minoru Ohsuga , Hiroyuki Takamura
- 申请人： Shinji Nakagawa , Toshio Ishii , Yutaka Takaku , Minoru Ohsuga , Hiroyuki Takamura
- 优先权： JP11-163442 19990610
- 主分类号： F01N300
- IPC分类号： F01N300
摘要：
If the output of an O2 sensor located downstream of a catalyst deviates from a predetermined range, the air-to-fuel ratio upstream of the catalyst is over-corrected to be a leaner value or a richer value beyond the predetermined purification-efficiency range when the output of the O2 sensor downstream of the catalyst indicates rich or lean, respectively, so that the output of the O sensor downstream of the catalyst returns within a predetermined range as soon as possible.
信息查询
