发明授权
- 专利标题: Air-fuel ratio control system for internal combustion engine
- 专利标题(中): 内燃机空燃比控制系统
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申请号: US13158192申请日: 2011-06-10
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公开(公告)号: US09249712B2公开(公告)日: 2016-02-02
- 发明人: Michinori Tani , Kenichi Maeda , Atsuhiro Miyauchi , Seiji Watanabe , Soichiro Goto
- 申请人: Michinori Tani , Kenichi Maeda , Atsuhiro Miyauchi , Seiji Watanabe , Soichiro Goto
- 申请人地址: JP Tokyo
- 专利权人: HONDA MOTOR CO., LTD.
- 当前专利权人: HONDA MOTOR CO., LTD.
- 当前专利权人地址: JP Tokyo
- 代理机构: Mori & Ward, LLP
- 优先权: JP2010-144486 20100625; JP2010-287552 20101224
- 主分类号: F02B27/04
- IPC分类号: F02B27/04 ; F01N11/00 ; F02D41/14 ; F02D41/24
摘要:
An air-fuel ratio control system for an internal combustion engine, which, at the resumption of air-fuel ratio feedback control, is capable of setting the initial value of an integral term of the feedback control to a value properly learned in preceding feedback control, thereby enabling improvement of control accuracy. To feedback-control the output value of an O2 sensor to a target value, a target air-fuel ratio is calculated. During the feedback control, when it is determined that a predetermined condition in which it is estimated that exhaust gas air-fuel ratio upstream of the catalyst is excellently reflected on an exhaust gas air-fuel ratio at a location midway or downstream of the catalyst is satisfied, an adaptive law input calculated immediately before interruption of the feedback control is updated and stored as the initial value of an integral term for the following execution of the feedback control.