发明授权
US07284369B2 Secondary air supply system and fuel injection amount control apparatus using the same
失效
二次空气供给系统和使用其的燃料喷射量控制装置
- 专利标题： Secondary air supply system and fuel injection amount control apparatus using the same
- 专利标题（中）： 二次空气供给系统和使用其的燃料喷射量控制装置
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申请号： US11020156申请日： 2004-12-27
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公开(公告)号： US07284369B2公开(公告)日： 2007-10-23
- 发明人: Tomoaki Nakano , Yuuki Sakamoto
- 申请人： Tomoaki Nakano , Yuuki Sakamoto
- 申请人地址： JP Kariya, Aichi-pref.
- 专利权人： Denso Corporation
- 当前专利权人： Denso Corporation
- 当前专利权人地址： JP Kariya, Aichi-pref.
- 代理机构： Nixon & Vanderhye P.C.
- 优先权： JP2003-432626 20031226; JP2004-034741 20040212; JP2004-133362 20040428; JP2004-133363 20040428
- 主分类号： F01N3/00
- IPC分类号： F01N3/00
摘要：
A secondary air pipe is connected on the upstream side from catalyst in an exhaust pipe, and a secondary air pump is provided at an upstream portion of the secondary air pipe. An opening/closing valve for opening/closing the secondary air pipe is provided on the downstream side from the secondary air pump. A pressure sensor for detecting pressure within pipe is provided between the secondary air pump and the opening/closing valve. An ECU calculates a secondary airflow rate based upon difference pressure between both secondary air supply pressure which is detected by the pressure sensor when the opening/closing valve is opened under such a condition that the secondary air pump is operated, and also, shutoff pressure which is detected by the pressure sensor when the opening/closing valve is closed.
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