FUEL INJECTION CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

Title:

FUEL INJECTION CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

Document Type and Number:

WIPO Patent Application WO/2009/031713

Kind Code:

A1

Abstract:

At the communicating time of a fuel discharge passage (C3) by a control valve (48), fuel flows from an outer control chamber (R2o) via a communication passage (47) into an inner control chamber (R2i), and flows from the inner control chamber (R2i) to a fuel tank (T). As a result of the fuel flow in the communication passage (47), a differential pressure (Pco > Pci) is produced between an inner control pressure (Pci) and an outer control pressure (Pco). As a result, the outer differential pressure just after the outer valve was opened can be set at a small value thereby to suppress the increase of the unburned HC quantity in the exhaust gases at a low-load time, as caused by the high rising rate of an outer needle valve (42) just after the outer valve was opened. Moreover, the inner differential pressure just after the inner valve was opened can be set at a large value thereby to suppress the increase of the smoke quantity in the exhaust gases, as caused by the low rising rate of an inner needle valve (43) just after the inner valve was opened.

Inventors:

OKUMURA FUMIHIRO (JP)
NOMURA SHIGEO (JP)

Application Number:

PCT/JP2008/066503

Publication Date:

March 12, 2009

Filing Date:

September 08, 2008

Export Citation:

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Assignee:

TOYOTA MOTOR CO LTD (JP)
DENSO CORP (JP)
OKUMURA FUMIHIRO (JP)
NOMURA SHIGEO (JP)

International Classes:

F02M45/08; F02M47/00; F02M61/10

Domestic Patent References:

WO2004033890A1

2004-04-22

Foreign References:

US20050089426A1	2005-04-28
US20030010845A1	2003-01-16
DE102004028618A1	2005-12-29
JP2002322970A	2002-11-08
JP2005526211A	2005-09-02
EP0967383A2	1999-12-29
JP2006528743A	2006-12-21
JP2005320904A	2005-11-17

Other References: