EP1751423A1 - Systeme d'injection de carburant - Google Patents

Systeme d'injection de carburant

Info

Publication number
EP1751423A1
EP1751423A1 EP05729602A EP05729602A EP1751423A1 EP 1751423 A1 EP1751423 A1 EP 1751423A1 EP 05729602 A EP05729602 A EP 05729602A EP 05729602 A EP05729602 A EP 05729602A EP 1751423 A1 EP1751423 A1 EP 1751423A1
Authority
EP
European Patent Office
Prior art keywords
fuel
injection system
filter
valve
supply line
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP05729602A
Other languages
German (de)
English (en)
Other versions
EP1751423B1 (fr
Inventor
Friedrich Boecking
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1751423A1 publication Critical patent/EP1751423A1/fr
Application granted granted Critical
Publication of EP1751423B1 publication Critical patent/EP1751423B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/165—Filtering elements specially adapted in fuel inlets to injector
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/31—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements
    • F02M2200/315—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements for damping fuel pressure fluctuations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series

Definitions

  • the invention is based on a fuel injection system of an internal combustion engine according to the type defined in more detail in the preamble of claim 1.
  • Such a fuel injection system is known from practice in a variety of ways and is used, for example, to inject fuel into a combustion chamber of a diesel engine of a motor vehicle.
  • a known fuel injection system is designed, for example, as a so-called common rail injection system, which comprises a high-pressure source which is connected to a high-pressure accumulator which forms the so-called commmon rail, which in turn is connected via a fuel supply line to fuel injectors, each in a combustion chamber protrude from the internal combustion engine.
  • the fuel injectors are each formed with a valve control unit and a nozzle unit.
  • a fuel duct leads into the nozzle unit and is connected to a fuel inlet of the respective fuel injector is, so that the fuel under high pressure can be injected into the respective combustion chamber.
  • pressure waves occur when the fuel injectors are opened or closed, which can spread into the common rail via the fuel supply line, which has a disadvantageous effect on precise pressure control and on a precise setting of the desired injection quantities.
  • a fuel injection valve for internal combustion engines is known from DE 197 16 771 A1, which has a rod-shaped filter element for particles contained in the fuel in a fuel channel leading to injection nozzles. The particles are broken up in the filter element.
  • the fuel injection system according to the invention with the features according to the preamble of claim 1 and a check valve which is arranged in the fuel channel of the injector and blocks a fuel flow in the direction of the fuel supply line, offers a compact and inexpensive solution for suppressing the propagation of pressure waves from the fuel injector in Direction of source of high pressure fuel.
  • the fuel injection system according to the invention is, for example, a common rail injection system of a diesel engine of a motor vehicle.
  • the fuel injector is used to inject fuel into a combustion chamber of the internal combustion engine.
  • the source of high-pressure fuel is then formed by a high-pressure accumulator, which forms the so-called common rail and provides fuel, which can be under a pressure of up to 1.8 kbar, for all injection valves of the internal combustion engine.
  • the check valve has an at least regionally spherical valve closing member which interacts with a conical seat and is biased in the closing direction by means of a closing spring.
  • the closing spring is preferably supported on, for example, an annular adjusting piece, so that the pretension of the closing spring and thus the minimum pressure required to open the check valve can be set.
  • Fuel injectors generally have a filter for separating particles in the area of their fuel inlet.
  • the fuel injection system according to the invention is preferably designed such that the valve seat is formed on the fuel filter.
  • the Check valve is then at least partially integrated bed component of the fuel filter-a.
  • the fuel filter is preferably designed as a rod filter, which has gaps or recesses, by means of which particles are comminuted due to pressure pulsations.
  • the rod filter In order to ensure a fuel flow between the columns of the rod filter which are generally arranged on the circumference of the rod filter and the valve seat, the rod filter preferably has an annular groove through which the fuel can flow to the check valve.
  • FIG. 1 shows a partial and basic illustration of a fuel injection system with a fuel injector
  • FIG. 2 shows a fuel inlet of the fuel injector of the fuel injection system according to FIG. 1
  • Figure 3 is an enlarged view of area III in Figure 2
  • FIG. 4 shows an alternative embodiment of a fuel inlet of a fuel injector.
  • a fuel injection system 10 which is a so-called common rail injection system and is used for injecting fuel into a combustion chamber of an internal combustion engine of a motor vehicle.
  • the fuel injection system 10 comprises a high-pressure pump 11, which is connected to a fuel tank (not shown here), is connected to a high-pressure accumulator 12, which represents a so-called common rail, and has fuel under pressure of up to 1 via fuel supply lines 13, 14, 15, 16 , 8 kbar for four identical fuel injectors, of which the fuel injector 17 connected to the fuel supply line 13 is shown in FIG.
  • the high-pressure accumulator thus serves as a fuel source for the fuel injectors.
  • the fuel injector 17 comprises a valve control unit 18 and a nozzle unit 19, in which a nozzle needle 20 is axially displaceably guided, which is used to control spray holes 21, which are arranged on the end face of the nozzle module 19 facing away from the valve control module 18 and projecting into the combustion chamber of the internal combustion engine are.
  • the fuel injector 17 has a connection piece or pressure pipe socket 22 with a fuel inlet 23, which is connected to the fuel supply line 13.
  • a fuel channel 24 leads from the fuel inlet 23 to a high-pressure chamber 25, which surrounds the nozzle needle 20 and from which, when the nozzle needle 20 is open, fuel is injected via the spray holes 21 into the combustion chamber of the internal combustion engine.
  • the fuel channel 24 is formed with an enlarged diameter in the area of the fuel inlet 23.
  • the area of increased diameter forms a rod filter bore 25, into which a so-called rod filter 26 is pressed, which serves as a filter element for particles contained in the fuel and causes the particles to be comminuted.
  • the rod filter 26 has recesses 27 on its circumference, which together with the wall of the rod filter bore 25 form gaps, which specify the maximum particle diameter that can pass through the rod filter 26.
  • valve seat 28 On the end of the rod filter 26 facing away from the fuel inlet 23 there is a valve seat 28 which is designed as a conical seat and serves as a seat for a valve closing member 29 of a check valve 30 which is designed as a ball and which controls a fuel flow from the fuel channel 24 in the direction of the fuel inlet 23 and thus in the direction the common rail 12 locks.
  • the check valve 30 also has a closing spring 31, which acts on the valve closing member 29 and is supported on an annular adjusting disk 32, the position or thickness of which presets the prestressing of the closing spring 31.
  • the preload of the spring 31 can be adjusted by the insertion depth of the rod filter 26 into the rod filter bore 25.
  • the check valve 30 can be used to prevent pressure waves that are generated within the injector 17 from spreading over the rest of the fuel injection system.
  • the rod filter 26 furthermore has an annular groove 33 which permits a fuel flow between the filter unit of the rod filter 26 and the valve seat 28.
  • FIG. 3 shows an alternative embodiment of a fuel inlet 40 in a fuel injector of a fuel injection system of the type shown in FIG. 1.
  • the fuel inlet 40 differs from the fuel inlet shown in FIG. 2 in that it is designed without a filter element, ie without a rod filter. Rather, the fuel channel 24 is provided in the area of the fuel inlet 40 with a check valve 30, which has a ball 29 serving as a valve closing member, which is biased in the blocking direction by means of a closing spring 31 which is supported on a shim 32.
  • the valve closing member 29 interacts with a valve seat 28 which forms a conical seat and is formed on a press-in part 41 designed as a press belt.
  • valve needle 20 When the valve needle 20 is moved to the open position on the fuel injector 17, the amount of fuel required for the injection process is taken from the high-pressure chamber 25 of the nozzle unit 19, the fuel channel 24 and the fuel supply line 13.
  • the check valve 30 opens, i. H. the valve ball 29 lifts off its valve seat 28. Pressure waves which arise within the injector and run as reflection waves in the direction of the fuel inlet 23 or 40 and thus in the direction of the common rail 12, however, are extinguished when the check valve 30 is closed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

L'invention concerne un système d'injection de carburant d'un moteur à combustion interne, qui comprend au moins un injecteur de carburant (17) relié, par l'intermédiaire d'un orifice d'admission de carburant (23), à une conduite d'amenée de carburant (13) qui est reliée à une source (12) pour du carburant sous haute pression. Selon l'invention, l'injecteur de carburant (17) comprend une unité de commande de soupape (18) et une unité buse (19) à laquelle conduit un conduit de carburant (24) relié à la conduite d'amenée de carburant (13). Dans le conduit de carburant (24) se trouve une soupape antiretour (30) qui empêche un écoulement du carburant en direction de la conduite d'amenée de carburant.
EP05729602A 2004-05-18 2005-03-01 Systeme d'injection de carburant Expired - Lifetime EP1751423B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004024528A DE102004024528A1 (de) 2004-05-18 2004-05-18 Kraftstoffeinspritzsystem
PCT/EP2005/050884 WO2005113976A1 (fr) 2004-05-18 2005-03-01 Systeme d'injection de carburant

Publications (2)

Publication Number Publication Date
EP1751423A1 true EP1751423A1 (fr) 2007-02-14
EP1751423B1 EP1751423B1 (fr) 2011-12-28

Family

ID=34963036

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05729602A Expired - Lifetime EP1751423B1 (fr) 2004-05-18 2005-03-01 Systeme d'injection de carburant

Country Status (4)

Country Link
US (1) US20070221175A1 (fr)
EP (1) EP1751423B1 (fr)
DE (1) DE102004024528A1 (fr)
WO (1) WO2005113976A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7617991B2 (en) * 2006-03-31 2009-11-17 Delphi Technologies, Inc. Injector fuel filter with built-in orifice for flow restriction
DE102006019283A1 (de) * 2006-04-26 2007-10-31 Bayerische Motoren Werke Ag Kraftstoffinjektor für eine Brennkraftmaschine
EP2034173A1 (fr) * 2007-09-07 2009-03-11 Siemens VDO Automotive S.p.A. Manchon de raccordement de carburant doté d'un filtre à carburant

Family Cites Families (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2559364A (en) * 1944-06-24 1951-07-03 William H Mashinter Fuel injector
US2474419A (en) * 1945-02-02 1949-06-28 Jesse R Hale Fuel injection apparatus
US2680651A (en) * 1953-06-16 1954-06-08 American Locomotive Co Fuel injector
US3118611A (en) * 1963-02-04 1964-01-21 Martin J Berlyn Fuel injection nozzle
US4081140A (en) * 1976-07-19 1978-03-28 Caterpillar Tractor Co. Capsule-type fuel nozzle
US4197996A (en) * 1978-12-07 1980-04-15 Ford Motor Company Constant pressure fuel injector assembly
JPS58113574A (ja) * 1981-12-28 1983-07-06 Komatsu Ltd エンジンの燃料噴射装置
DE3201218A1 (de) * 1982-01-16 1983-07-28 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoff-einspritzduese fuer brennkraftmaschinen
NL8501647A (nl) * 1985-06-06 1987-01-02 Volvo Car Bv Brandstofinjector.
IT8553563V0 (it) * 1985-07-02 1985-07-02 Weber Spa Dispositivo di controllo per apparati di iniezione del combustibile per motori a ciclo diesel
DE3742241A1 (de) * 1987-02-14 1988-08-25 Daimler Benz Ag Piezosteuerventil zur steuerung der kraftstoffeinspritzung ueber ein einspritzventil bei brennkraftmaschinen
GB8820706D0 (en) * 1988-09-01 1988-10-05 Lucas Ind Plc Fuel injection systems
DE3923271A1 (de) * 1989-07-14 1991-01-24 Bosch Gmbh Robert Kraftstoffeinspritzeinrichtung fuer brennkraftmaschinen, insbesondere pumpeduese
DE4037952A1 (de) * 1990-11-29 1992-06-04 Bosch Gmbh Robert Verfahren zur montage eines filters an einem ventil und ventil
DE4203144A1 (de) * 1992-02-05 1993-08-12 Bosch Gmbh Robert Kraftstoffeinspritzduese fuer diesel-brennkraftmaschinen zum einspritzen von zuendunwilligem hauptkraftstoff und zuendkraftstoff
GB9404260D0 (en) * 1994-03-05 1994-04-20 Lucas Ind Plc Fuel injection nozzles
JPH08277761A (ja) * 1995-04-06 1996-10-22 Nippon Soken Inc 蓄圧式燃料噴射装置
DE19608608A1 (de) * 1996-03-06 1997-09-11 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
JPH10122090A (ja) * 1996-10-14 1998-05-12 Komatsu Ltd ディーゼルエンジンの燃料噴射装置
DE19716771B4 (de) 1997-04-22 2005-10-20 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
JP2000097124A (ja) * 1998-09-17 2000-04-04 Nippon Soken Inc 高圧流体噴射装置
FR2792853B1 (fr) * 1999-04-30 2001-07-06 Bp Chemicals Snc Buse a ressort avec fente de 360 degres, pour l'injection de liquide dans un reacteur a lit fluidise
JP4583693B2 (ja) * 2000-02-02 2010-11-17 シーメンス ヴィディーオー オートモティヴ コーポレイション 燃料噴射器のフィルター兼アジャスタ
DE10109410A1 (de) * 2001-02-28 2002-09-05 Bosch Gmbh Robert Brennstoffeinspritzventil

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2005113976A1 *

Also Published As

Publication number Publication date
WO2005113976A1 (fr) 2005-12-01
EP1751423B1 (fr) 2011-12-28
US20070221175A1 (en) 2007-09-27
DE102004024528A1 (de) 2005-12-15

Similar Documents

Publication Publication Date Title
EP2635794B1 (fr) Dispositif pour injecter du carburant dans la chambre de combustion d'un moteur à combustion interne
DE4340305C2 (de) Kraftstoffeinspritzdüse für eine Brennkraftmaschine
EP2331806A1 (fr) Injecteur comportant un filtre à particules disposé en amont du papillon d'admission
WO2010023012A1 (fr) Soupape d'injection de carburant
EP1918570B1 (fr) Injecteur de carburant doté d'un segment de volume de stockage
EP1045975B1 (fr) Unite servant a commander l'etablissement de la pression dans une unite de pompage
DE102004015744A1 (de) Common-Rail-Injektor
EP2294309A1 (fr) Injecteur de carburant
EP1354133B1 (fr) Dispositif d'injection de carburant
EP1751423B1 (fr) Systeme d'injection de carburant
WO2002055868A1 (fr) Unite d'injection par accumulation de pression
WO2009141175A1 (fr) Soupape d'injection de carburant
DE10057683B4 (de) Kraftstoffeinspritzeinrichtung
DE102007005382A1 (de) Leckagefreier Injektor
AT512439A1 (de) Vorrichtung zum einspritzen von kraftstoff in den brennraum einer brennkraftmaschine
DE10160490B4 (de) Kraftstoff-Einspritzvorrichtung, Kraftstoffsystem sowie Brennkraftmaschine
WO2010023133A1 (fr) Soupape d'injection et système d'alimentation en fluide doté d'une soupape d'injection
EP2271836B1 (fr) Systèmes d'injection de carburant à alimentation en carburant non étranglée vers les injecteurs
EP2294308A1 (fr) Injecteur de carburant
DE10326260A1 (de) Kraftstoffeinspritzventil und Verfahren zu dessen Steuerung
DE10327181A1 (de) Kraftstoffeinspritzsystem
WO2005031154A1 (fr) Element pour dispositif d'injection de carburant de moteur a combustion interne et dispositif d'injection de carburant
WO2003038271A1 (fr) Soupape d'injection de carburant
WO2008095743A1 (fr) Injecteur pour injecter du carburant dans des chambres de combustion de moteurs à combustion interne
EP2085604A1 (fr) Injecteur de carburant

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20061218

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE ES FR GB

DAX Request for extension of the european patent (deleted)
RBV Designated contracting states (corrected)

Designated state(s): DE ES FR GB

17Q First examination report despatched

Effective date: 20100412

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE ES FR GB

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502005012269

Country of ref document: DE

Effective date: 20120322

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20120328

26N No opposition filed

Effective date: 20121001

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502005012269

Country of ref document: DE

Effective date: 20121001

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120328

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120408

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20140319

Year of fee payment: 10

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20151130

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150331

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20160525

Year of fee payment: 12

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 502005012269

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20171003