发明名称 |
SECONDARY AIR SUPPLY SYSTEM FOR INTERNAL COMBUSTION ENGINE |
摘要 |
<p>A secondary air supply system includes an electric air pump that supplies secondary air to a location upstream of an exhaust gas purification catalyst arranged in an exhaust passage; a control valve that opens/closes a secondary air supply passage; a pressure detector that detects a pressure between the pump and the control valve; and a control unit that detects a first pressure in a first operating state where the control valve is closed, and detects a second pressure in a second operating state where the control valve is open, using the pressure detector. The control unit corrects at least one of the first and second pressures based on a first driving voltage for the pump in the first operating state and a second driving voltage in the second operating state, and estimates a secondary air flow rate based on the first and second pressures after correction.</p> |
申请公布号 |
EP2800884(A1) |
申请公布日期 |
2014.11.12 |
申请号 |
EP20130703473 |
申请日期 |
2013.01.02 |
申请人 |
TOYOTA JIDOSHA KABUSHIKI KAISHA |
发明人 |
KONDO, SHINYA;KAWAMURA, YUSUKE;UMEZAWA, KOJI |
分类号 |
F01N3/22;F01N3/32;F01N9/00;F01N13/04 |
主分类号 |
F01N3/22 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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