INTERNAL COMBUSTION ENGINE IGNITION PERIOD CONTROL DEVICE

Title:

INTERNAL COMBUSTION ENGINE IGNITION PERIOD CONTROL DEVICE

Document Type and Number:

WIPO Patent Application WO/2014/010022

Kind Code:

A1

Abstract:

Provided is an internal combustion engine ignition period control device whereby knock learning can be appropriately carried out by performing knock learning adapted to the engine combustion behaviour. The inventor discovered that a knock suppression effect utilising the ignition lagging angle could be achieved by the following principle: "when the combustion period is shifted towards the lagging angle side, the cylinder volume in the combustion period is increased, and as a result elevation of the unburned gas temperature and pressure is suppressed." The ignition period control device according to the invention makes it possible to perform knock learning in a novel fashion, based on this principle. This ignition period control device learns the "cylinder volume percentage". The cylinder volume percentage is a parameter that is determined from the amount of change of the cylinder volume. Even when the engine operating condition changes, the learned ignition period that is learned by knock control means can be set to a suitable value by making this period change in a manner reflecting this learned cylinder volume percentage.

Inventors:

NAKASAKA YUKIHIRO (JP)

Application Number:

PCT/JP2012/067504

Publication Date:

January 16, 2014

Filing Date:

July 09, 2012

Export Citation:

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Assignee:

TOYOTA MOTOR CO LTD (JP)
NAKASAKA YUKIHIRO (JP)

International Classes:

F02P5/153; F02P5/152

Foreign References:

JP2008051016A	2008-03-06
JP2008297909A	2008-12-11
JP2005315099A	2005-11-10
JP2011256725A	2011-12-22
JP2008121597A	2008-05-29
JP2009215989A	2009-09-24
JP2010190134A	2010-09-02

Other References: