Invention Grant
- Patent Title: Variable valve timing apparatus and control method therefor
- Patent Title (中): 可变气门正时装置及其控制方法
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Application No.: US12303341Application Date: 2007-03-22
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Publication No.: US08047169B2Publication Date: 2011-11-01
- Inventor: Zenichiro Mashiki , Yasumichi Inoue , Noboru Takagi , Haruyuki Urushihata
- Applicant: Zenichiro Mashiki , Yasumichi Inoue , Noboru Takagi , Haruyuki Urushihata
- Applicant Address: JP Aichi-Ken
- Assignee: Toyota Jidosha Kabushiki Kaisha
- Current Assignee: Toyota Jidosha Kabushiki Kaisha
- Current Assignee Address: JP Aichi-Ken
- Agency: Sughrue Mion, PLLC
- Priority: JP2006-157600 20060606
- International Application: PCT/JP2007/056761 WO 20070322
- International Announcement: WO2007/141952 WO 20071213
- Main IPC: F01L1/34
- IPC: F01L1/34
Abstract:
An ECU executes a program including the steps of: controlling, when the phase of an intake valve is a phase advanced relative to a threshold value CA (FF) (NO in S106), an electric motor operating an intake VVT mechanism by feedback control (S202); and controlling, when the phase of the intake valve is a phase retarded relative to the threshold value CA (FF) (YES in S106), the electric motor by feed-forward control (S200). Under the feed-forward control, a duty command value is output that is smaller than an upper limit of a duty command value under the feedback control.
Public/Granted literature
- US20090194047A1 VARIABLE VALVE TIMING APPARATUS AND CONTROL METHOD THEREFOR Public/Granted day:2009-08-06
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