Control apparatus for internal combustion engine

Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – With indicator or control of power plant

Reexamination Certificate

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C123S090170

Reexamination Certificate

active

08086385

ABSTRACT:
To provide a control apparatus for an internal combustion engine which can effectively utilize a scavenging effect while suppressing a torque difference in the internal combustion engine provided with a variable valve mechanism which makes a valve overlap period variable.When a scavenging effect utilization condition that the scavenging effect using exhaust pressure pulsation can be effectively utilized is established, a valve overlap period is set so as to overlap with a timing at which a trough of the exhaust pressure pulsation comes. In this occasion, a set value of the valve overlap period is limited such that an increase amount of a torque index value associated with the setting of valve overlap period does not exceed a predetermined permissible value.

REFERENCES:
patent: 5133309 (1992-07-01), Ishii
patent: 6352061 (2002-03-01), Takahashi
patent: 7051687 (2006-05-01), Shimizu et al.
patent: 06108858 (1994-04-01), None
patent: A-6-173723 (1994-06-01), None
patent: A-10-318001 (1998-12-01), None
patent: A-11-22499 (1999-01-01), None
patent: A-11-82074 (1999-03-01), None
patent: A-2001-3757 (2001-01-01), None
patent: A-2003-3871 (2003-01-01), None
patent: A-2004-190514 (2004-07-01), None
International Search Report mailed on Mar. 17, 2009 in corresponding International Application No. PCT/JP2009/052405 (with translation).

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