ENGINE CONTROL DEVICE - HITACHI AUTOMOTIVE SYSTEMS LTD

Title:

ENGINE CONTROL DEVICE

Document Type and Number:

WIPO Patent Application WO/2013/161415

Kind Code:

A1

Abstract:

In order to solve a problem that in an internal combustion engine in which abnormal combustion (knocking or an accidental fire) of an engine is detected from an ion signal, the setting of an abnormal combustion determination threshold value under a transient condition in which an engine operating state abruptly changes is difficult to thereby cause erroneous determination, the present invention is an engine control device provided with an ion signal detection means for detecting ions generated during combustion, and provided with an abnormal combustion determination means for determining knocking or an accidental fire according to an ion signal detected by the detection means, the engine control device being characterized by being provided with an in-cylinder temperature estimation means for estimating the in-cylinder temperature in a normal combustion cycle under a current operating condition of the engine, and by setting the knocking determination threshold value or accidental fire determination threshold value of the ion signal on the basis of the estimated in-cylinder temperature information. Consequently, it becomes possible to accurately detect abnormal combustion even under a transient operating condition.

Inventors:

KUMANO KENGO (JP)
AKAGI YOSHIHIKO (JP)
SHIRAISHI TAKUYA (JP)
OGATA KENICHIROH (JP)

Application Number:

PCT/JP2013/056897

Publication Date:

October 31, 2013

Filing Date:

March 13, 2013

Export Citation:

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Assignee:

HITACHI AUTOMOTIVE SYSTEMS LTD (JP)

International Classes:

F02D45/00; F02D13/02; F02P17/12

Foreign References:

JPH10103210A	1998-04-21
JP2008101591A	2008-05-01
JPH06323191A	1994-11-22
JP2003184635A	2003-07-03
JP2003184725A	2003-07-03
JP2001041096A	2001-02-13
JPH0534244A	1993-02-09

Other References: