发明授权
- 专利标题: Crank angle detecting apparatus and reference angular position detection method for internal combustion engine
- 专利标题(中): 曲柄角检测装置和内燃机参考角位置检测方法
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申请号: US11497518申请日: 2006-08-02
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公开(公告)号: US07360407B2公开(公告)日: 2008-04-22
- 发明人: Takashi Namari , Kazuhito Tokugawa , Satoshi Chida
- 申请人: Takashi Namari , Kazuhito Tokugawa , Satoshi Chida
- 申请人地址: JP Tokyo
- 专利权人: Keihin Corporation
- 当前专利权人: Keihin Corporation
- 当前专利权人地址: JP Tokyo
- 代理机构: Westerman, Hattori, Daniels & Adrian, LLP.
- 优先权: JP2005-227834 20050805
- 主分类号: G01M15/00
- IPC分类号: G01M15/00
摘要:
A rotor is provided such that the rotor rotates with a crank shaft of an engine. A plurality of detection sections are formed on a rotor periphery at equal angle intervals. A particular detection section is used for detection of a reference crank angle. A pickup is provided near the rotor periphery. A crank angle detecting apparatus receives pulse signals from the pickup, and sequentially detects a detection section time. The detection section time is a time interval from the front end to the rear end of the detection section. The crank angle detecting apparatus also sequentially detects a time between each two adjacent detection sections (detection section distance time), which is a time from the rear end of one detection section to the front end of the next detection section. A reference angle detection signal, which indicates detection of the detection section dedicated for the reference angle, is generated when at least two ratio conditions are met. These ratio conditions are decided based on the detection section time and the detection section distance time.