Fuel injection control system for internal combustion engine and method

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(11)

EP 1 249 600 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	15.09.2004 Bulletin 2004/38

(43)	Date of publication A2:
	16.10.2002 Bulletin 2002/42

(21)	Application number: 02008007.3

(22)	Date of filing: 10.04.2002

(51)	International Patent Classification (IPC)⁷: F02D 41/30, F02M 61/06, F02M 61/16, F02M 61/18, F02M 65/00, F02M 45/08

(84)	Designated Contracting States:
	AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
	Designated Extension States:
	AL LT LV MK RO SI

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Priority:

11.04.2001 JP 2001113116

(71)	Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
	Aichi-ken 471-8571 (JP)

(72)	Inventors:
	Okada, Shin, c/oToyota Jidosha Kabushiki Kaisha Toyota-shi, Aichi-ken, 471-8571 (JP) Makino, Makoto, c/oToyota Jidosha Kabushiki Kaisha Toyota-shi, Aichi-ken, 471-8571 (JP)

(74)	Representative: Leson, Thomas Johannes Alois, Dipl.-Ing.
	Tiedtke-Bühling-Kinne & Partner GbR, TBK-Patent, Bavariaring 4 80336 München 80336 München (DE)

(54)	Fuel injection control system for internal combustion engine and method

(57) Control for injecting fuel is performed both through a first nozzle hole (4) and a second nozzle hole (5) by setting a needle valve (2) at a high-lift position in a fuel injector. The fuel injection is performed only through the first nozzle hole (4), not through the second nozzle hole (5) by setting the needle valve (2) at a low-lift position of the fuel injector. When operation of an internal combustion engine continues for a predetermined period of time under conditions requiring the needle valve (2) to be set in the low-lift position, control for injecting the fuel through the nozzle hole (5) is performed.

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