Electric-actuated control valve of a unit fuel injector

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(11)

EP 2 479 419 A8

(12)	CORRECTED EUROPEAN PATENT APPLICATION
	Note: Bibliography reflects the latest situation

(15)	Correction information:
	Corrected version no 1 (W1 A3)

(48)	Corrigendum issued on:
	05.06.2013 Bulletin 2013/23

(88)	Date of publication A3:
	27.03.2013 Bulletin 2013/13

(43)	Date of publication:
	25.07.2012 Bulletin 2012/30

(21)	Application number: 12151521.7

(22)	Date of filing: 18.01.2012

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International Patent Classification (IPC):

F02M 57/02^(2006.01)

F02M 47/02^(2006.01)

(84)	Designated Contracting States:
	AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
	Designated Extension States:
	BA ME

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Priority:

21.01.2011 US 201113010980

(71)	Applicant: International Engine Intellectual Property Company, LLC
	Warrenville, IL 60555 (US)

(72)	Inventors:
	El-Beshbeeshy, Mahmoud S. Mount Prospect, IL Illinois 60056 (US) Siuchta, Grzegorrz Des Plaines, IL Illinois 60016 (US) Malhotra, Rakesh Aurora, IL Illinois 60503 (US)

(74)	Representative: Kuhnen & Wacker
	Patent- und Rechtsanwaltsbüro Prinz-Ludwig-Straße 40A 85354 Freising 85354 Freising (DE)

(54)	Electric-actuated control valve of a unit fuel injector

(57) A unit fuel injector (10) has a control valve (40) in which a valve spool (92) is displaceable within a bore (91) of a valve body (90) between a limit of displacement that fully opens an oil outlet port (42) to an oil inlet port (44) while closing an oil drain port (106) to the oil outlet port (42) and a limit of displacement that closes the oil outlet port (42) to the oil inlet port (44) while opening the oil outlet port (42) to the oil drain port (106). The valve spool (92) has a spool body (96) whose geometry defines an exterior envelope of the valve spool (92). Permanent magnets (98,100) are disposed within a bore (91) of the spool body (90) inside of the exterior envelope, and electromagnets (102,104) are electromagnetically coupled with the permanent magnets (98,100) for displacing the valve spool (92) within the valve body bore (91).