发明申请
- 专利标题: VARIABLE VALVE TIMING APPARATUS FOR INTERNAL COMBUSTION ENGINE
- 专利标题(中): 用于内燃机的可变阀定时装置
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申请号: US13695523申请日: 2011-04-14
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公开(公告)号: US20130042829A1公开(公告)日: 2013-02-21
- 发明人: Atsushi Hayashida , Yoshihito Moriya , Haruhito Fujimura , Yoshirou Kamo
- 申请人: Atsushi Hayashida , Yoshihito Moriya , Haruhito Fujimura , Yoshirou Kamo
- 申请人地址: JP Toyota-shi
- 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-shi
- 优先权: JP2010-103679 20100428
- 国际申请: PCT/IB2011/000828 WO 20110414
- 主分类号: F01L1/344
- IPC分类号: F01L1/344
摘要:
A variable valve timing apparatus includes: a variable valve timing mechanism that changes a valve timing and locks the valve timing at a most retarded timing; an oil control valve that controls a mode in which hydraulic fluid is supplied to the variable valve timing mechanism; and a controller that varies a duty ratio of the oil control valve within a set range that includes an advance active band, a retard active band, a holding range, an advance release range and a retard release range. In the advance release range, a varying speed of the valve timing is higher than the holding range and a housing rotor is disengaged from a vane rotor. When an engine operating state is a release request state, the controller sets the duty ratio of the oil control valve within the advance release range.