Fuel injector with a control rod controlled by the fuel pressure in a control chamber

(19)

(11)

EP 1 136 692 A8

(12)	CORRECTED EUROPEAN PATENT APPLICATION

(48)	Corrigendum issued on:
	30.01.2002 Bulletin 2002/05

(43)	Date of publication:
	26.09.2001 Bulletin 2001/39

(21)	Application number: 01106965.5

(22)	Date of filing: 20.03.2001

(51)	International Patent Classification (IPC)⁷: F02M 47/02, F02M 45/00

(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:

21.03.2000 IT TO000268

(71)	Applicant: C.R.F. Società Consortile per Azioni
	10043 Orbassano (TO) (IT)

(72)	Inventor:
	Ricco Mario 70010 Casamassima (IT)

(74)	Representative: Eccetto, Mauro et al
	Studio Torta S.r.l., Via Viotti, 9 10121 Torino 10121 Torino (IT)

(54)	Fuel injector with a control rod controlled by the fuel pressure in a control chamber

(57) The injector (7) has a control rod (17) controlled by the fuel pressure in a control chamber (52), and a nozzle (13) having an injection chamber (31) supplied with pressurized fuel for injection. The nozzle (13) has at least one injection orifice (16) normally closed by a pin (19) connected to the rod (17) and activated by the fuel pressure in the injection chamber (31). The control chamber (52) has a pressurized-fuel intake conduit (57), and a fuel discharge conduit (59) which is normally closed and is opened for a variable length of time depending on the amount of fuel to be injected. The pin (19) and the rod (17), and/or the intake conduit (57) and the discharge conduit (59), are so sized as to keep the pin (19) and the rod (17) hydraulically balanced in the maximum-lift position to open the orifice (16).