Invention Grant
- Patent Title: Exhaust purification system for internal combustion engine and control method of the exhaust purification system
- Patent Title (中): 内燃机排气净化系统及排气净化系统的控制方法
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Application No.: US12280564Application Date: 2007-02-26
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Publication No.: US08161729B2Publication Date: 2012-04-24
- Inventor: Kenji Katoh
- Applicant: Kenji Katoh
- Applicant Address: JP Toyota-shi, Aichi-ken
- Assignee: Toyota Jidosha Kabushiki Kaisha
- Current Assignee: Toyota Jidosha Kabushiki Kaisha
- Current Assignee Address: JP Toyota-shi, Aichi-ken
- Agency: Finnegan, Henderson, Farabow, Garrett & Dunner, LLP
- Priority: JP2006-052540 20060228
- International Application: PCT/IB2007/000457 WO 20070226
- International Announcement: WO2007/099429 WO 20070907
- Main IPC: F01N3/00
- IPC: F01N3/00
Abstract:
An exhaust purification system for an internal combustion engine has a hydrogen concentration sensor (2) disposed upstream of a catalytic converter (1) in the engine exhaust system to detect a hydrogen concentration in the exhaust gas. An optimum combustion air-fuel ratio is then estimated based on the detected hydrogen concentration.
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