- 专利标题: Exhaust purification apparatus for internal combustion engine
- 专利标题(中): 内燃机排气净化装置
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申请号: US10768141申请日: 2004-02-02
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公开(公告)号: US07032374B2公开(公告)日: 2006-04-25
- 发明人: Shuntaro Okazaki , Noriyasu Adachi , Naoto Kato , Toshinari Nagai , Yasuhiro Oi , Daisuke Kobayashi , Akira Ohata , Koji Ide
- 申请人: Shuntaro Okazaki , Noriyasu Adachi , Naoto Kato , Toshinari Nagai , Yasuhiro Oi , Daisuke Kobayashi , Akira Ohata , Koji Ide
- 申请人地址: JP Toyota
- 专利权人: Toyota Jidosha Kabushiki Kaisha
- 当前专利权人: Toyota Jidosha Kabushiki Kaisha
- 当前专利权人地址: JP Toyota
- 代理机构: Oliff & Berridge, PLC
- 优先权: JP2003-026338 20030203; JP2004-013225 20040121
- 主分类号: F01N3/00
- IPC分类号: F01N3/00
摘要:
An exhaust purification apparatus for an internal combustion engine includes a catalyst unit disposed in an exhaust passage of the engine, upstream and downstream air-fuel-ratio sensors disposed upstream and downstream, respectively, of the catalyst unit, a main-feedback controller, and a sub-feedback controller. The main-feedback controller calculates a main-feedback control quantity on the basis of an output value of the upstream air-fuel-ratio sensor and a predetermined upstream-side target value, and corrects, on the basis of the main-feedback control quantity, the quantity of fuel injected by an fuel injector. The sub-feedback controller calculates a sub-feedback control quantity on the basis of an output value of the downstream air-fuel-ratio sensor and a predetermined downstream-side target value, and corrects, on the basis of the sub-feedback control quantity, the quantity of fuel injected by the fuel injector, independently of the correction of the fuel injection quantity by the main-feedback control means.