Invention Grant
- Patent Title: EGR control method of internal combustion engine
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Application No.: US14803514Application Date: 2015-07-20
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Publication No.: US09732667B2Publication Date: 2017-08-15
- Inventor: Yasuhiro Kuze
- Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
- Applicant Address: JP Toyota-shi
- Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
- Current Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
- Current Assignee Address: JP Toyota-shi
- Agency: Andrews Kurth Kenyon LLP
- Priority: JP2014-148964 20140722; JP2015-114825 20150605
- Main IPC: F02M25/07
- IPC: F02M25/07 ; F02B37/00 ; F02B37/18 ; F02M26/46 ; F02M26/48 ; F02D41/00 ; F02M26/06 ; F02M26/38 ; F02B37/12 ; F02M26/43 ; F02D41/30 ; F02M26/15

Abstract:
The invention has an object to control an EGR amount accurately in transient time. An ECU switches EGR control to the one-valve EGR control and the both-valve EGR control based on a request EGR amount. When the EGR control is switched to the one-valve EGR control from the both-valve EGR control, an EGR valve of one bank is closed first. Next, during a time period until an opening degree restriction time period elapses after the EGR valve is closed, an opening degree of an EGR valve of the other bank is restricted to be smaller than a one-valve target opening degree. Subsequently, when the opening degree restriction time period elapses, restriction of the opening degree of the EGR valve is cancelled, and the opening degree of the EGR valve is changes to the one-valve target opening degree.
Public/Granted literature
- US20160025046A1 EGR CONTROL METHOD OF INTERNAL COMBUSTION ENGINE Public/Granted day:2016-01-28
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