EP1126160B1 - Injecteur pour injecter du carburant dans un moteur à combustion interne - Google Patents

Injecteur pour injecter du carburant dans un moteur à combustion interne Download PDF

Info

Publication number
EP1126160B1
EP1126160B1 EP01102406A EP01102406A EP1126160B1 EP 1126160 B1 EP1126160 B1 EP 1126160B1 EP 01102406 A EP01102406 A EP 01102406A EP 01102406 A EP01102406 A EP 01102406A EP 1126160 B1 EP1126160 B1 EP 1126160B1
Authority
EP
European Patent Office
Prior art keywords
throttle
injection
diameter
fuel
inlet
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.)
Expired - Lifetime
Application number
EP01102406A
Other languages
German (de)
English (en)
Other versions
EP1126160A2 (fr
EP1126160A3 (fr
Inventor
Heinz Lixl
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.)
Siemens AG
Original Assignee
Siemens AG
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7631258&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1126160(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP1126160A2 publication Critical patent/EP1126160A2/fr
Publication of EP1126160A3 publication Critical patent/EP1126160A3/fr
Application granted granted Critical
Publication of EP1126160B1 publication Critical patent/EP1126160B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
    • F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
    • 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
    • F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
    • 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
    • F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
    • F02M45/12—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship providing a continuous cyclic delivery with variable pressure
    • 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
    • F02M2200/21—Fuel-injection apparatus with piezoelectric or magnetostrictive elements

Definitions

  • the invention relates to an injection valve for injection of fuel in an internal combustion engine according to the preamble of claim 1
  • Such injection valve is for example from the EP-A-0 192 241 or GB-A-2 336 627.
  • Such injectors are for Control the fluid flows provided with servo valves.
  • injection systems For the fuel supply of internal combustion engines increasingly used in storage injection systems with which worked very high injection pressures.
  • Such injection systems are as common-rail systems (for diesel engines) and HPDI injection systems (for gasoline engines) known.
  • injection systems use fuel with a high-pressure pump in one common to all cylinders of the engine Accumulator conveys, from there to the injectors The individual cylinders are supplied with fuel.
  • the Opening and closing of the injectors is doing in the Usually electromagnetically or piezoelectrically operated Actuators controlled.
  • the injectors are in such systems equipped with servovalves opening hydraulically and closing the injector nozzle needle, that means in particular the beginning and the end of the injection process timed.
  • the servo valve influences this in conjunction with control chokes especially the speed, with which the injection valve opens and closes.
  • the speed, with which the injector opens be different from that Speed at which the injector closes.
  • the Injector should e.g. in common-rail systems for diesel engines at the beginning of the injection for a better mixing slowly open the fuel with the air controlled, whereas the injection valve at the end of the injection process must close quickly to prevent soot formation.
  • Servo valves for common rail systems are usually considered 2/2-way valves or 3/2-way valves executed.
  • the version as 2/2-way valve with an inlet throttle and an outlet throttle has the disadvantage that the Opening and closing operations of the injection valve by the embodiment the fuel inlet and the fuel drain only within change very narrow boundaries.
  • a servo valve for controlling Fluid streams known in which the in a first fluid chamber pressure applied to the valve body of the servo valve Opening and closing the servo valve causes.
  • the operation of the servo valve has the opening or closing of a separate Fluid channels result.
  • This fluid channel leads from a Master cylinder, which exerts pressure on the fluid, to secondary cylinders, which are actuated by the pressurized fluid.
  • This known arrangement in which the master cylinder a Master cylinder of a motor vehicle and the secondary cylinder Represent wheel brake cylinder, should serve to the Fluid channel of an antilock system in rapid succession delay can be opened and closed.
  • GB-A-2 336 627 discloses a servo valve for control of fluid flows, in which the speed with which the Nozzle needle releases the injection holes or closes over the ratio of inlet diameter and outlet diameter the inlet throttle and / or the outlet throttle adjustable is, wherein both throttles a ratio of inlet diameter have to drainage diameter of 1.
  • the invention is based on the object To design injection valve in that it has an improved Allows for very small quantity injection.
  • the fuel is at system pressure from a high-pressure accumulator, not shown above a high pressure bore and one provided with an inlet throttle 2 Inlet bore 3 a control chamber 4 in the injection valve housing 5 supplied.
  • a control chamber 4 in the injection valve housing 5 supplied.
  • the injection holes 8 are in the open injection valve with a nozzle chamber 9 in conjunction, in turn, over the high pressure bore 1 connected to the high pressure accumulator is. If both in the control room 4 and in the nozzle chamber 9, the full system pressure is applied, the nozzle needle 6 due pressed down the larger effective area in the control room 4, so that the injection holes 8 are closed.
  • an injection valve According to the prior art leads from the control chamber 4 a hole 10 in the injection valve housing 5 with an outlet throttle 11 to a valve integrated in the injector 5 servo valve 12 in the form of a 2/2-way valve. From the servovalve 12 leads a pressureless fuel return 13 to the not shown Fuel tank. The servo valve 12 switches via a Plunger 14, of an electromagnetic and / or piezoelectric actuator 15 is driven.
  • the servo valve 12 has the task to control the pressure, the in the control chamber 4 for opening and closing the injector is exerted on the axially movable nozzle needle 6.
  • the trained as cylindrical holes Inlet and outlet throttles 2 and 11 are dimensioned so that the pressure in the control chamber 4 decreases. Through this Pressure reduction takes the force acting on the nozzle needle 6 force while the pressure in the nozzle chamber 9 equals the system pressure remains so that the injector through the in the nozzle chamber 9 force acting on the nozzle needle 6 hydraulic is opened. By this displacement of the nozzle needle 6 is the connection of the nozzle chamber 9 with the injection holes. 8 restored and the fuel returned to the combustion chamber injected.
  • This known embodiment of an injection valve with a 2/2-way valve as a servo valve 12 has the disadvantage that The opening and closing operations only within very narrow Limits can be influenced independently of each other.
  • FIG. 2 shows a nozzle-shaped inlet throttle 2, at the ratio of the inlet diameter 16 to the outlet diameter 17 is greater than 1, that is, that the cross section the inlet throttle 2 in the direction of the arrow 18 marked flow direction decreases.
  • the inlet throttle 2 as a nozzle-shaped throttle is proposed the outlet throttle 11 with an increasing in the flow direction Cross-section diffuser-like form, the Ratio of inlet diameter 16 to the outlet diameter 17 now less than 1. This will cause the point (cavitation turnaround point, KUP), in which the fuel flow through the outlet throttle 11 is independent of the pressure difference between the inlet and the outlet of the outlet throttle, at a achieved lower pressure difference.
  • KUP cavitation turnaround point
  • the ratio of inlet diameter 16 to the outlet diameter 17 of the inlet throttle 2 and / or the outlet throttle 11 is 0.7 to 1.3.
  • the ratio of inlet diameter 16 to the outlet diameter 17 of the inlet throttle 2 is preferably about 1.3: 1.
  • the ratio of inlet diameter to outlet diameter the outlet throttle is preferably about 0.7: 1.
  • Figure 3 shows the influence of the throttle shape on the Kavitations-Umtschtician (KUP).
  • KUP Kavitations-Umtschtician
  • the inflow condition can be in the inlet throttle. 2 improve by a corresponding rounding of the leading edge, which is particularly advantageous in rising Rail Ben affects. Since the smallest quantity injection the more becomes more difficult, the greater the rail pressure becomes, affects the rounding of the inlet edge positive to the smallest quantity injection out.
  • the nozzle shape of the inlet throttle 2 together with the rounding of the leading edge effect a fast Closing and slowly opening the nozzle needle tip 7, as required for optimal combustion conditions becomes.
  • Figure 4 shows the flow rate of the inlet throttle 2 in dependence the cross-sectional shape of the throttle.
  • the nozzle shape is at low Rail However only slightly effective, resulting in a steeper Opening edge results, in turn, for a stable Opening at low pressures is required.

Claims (4)

  1. Injecteur pour l'injection de carburant dans un moteur à combustion interne, comprenant une servosoupape (12) destinée à commander l'injection de carburant et une chambre de commande (4) qui est en communication avec une arrivée de carburant à travers un étranglement d'arrivée (2) et qui peut être mise en communication avec un retour de carburant sans pression (13) à travers un étranglement d'écoulement (11), la pression régnant dans la chambre de commande (4) agissant sur une aiguille de buse mobile (6) qui est liaison fonctionnelle avec une pointe d'aiguille de buse (7), laquelle dégage ou obture des trous d'injection (8) lors du déplacement de l'aiguille de buse (6), la servosoupape (12) étant actionnée par un actionneur (15) et pouvant être déplacée entre une position d'ouverture qui met l'étranglement d'écoulement (11) en communication avec le retour de carburant sans pression (13), et une position de fermeture qui ferme cette communication,
    caractérisé en ce que
    la vitesse avec laquelle l'aiguille de buse (6) dégage ou obture les trous d'injection (8) est réglée par un étranglement d'arrivée (12) en forme de tuyère, qui présente un rapport entre le diamètre d'arrivée (16) et le diamètre d'écoulement (17) qui est supérieur à 1 et/ou par un étranglement d'écoulement (11) du type diffuseur, qui présente un rapport entre le diamètre d'arrivée (16) et le diamètre d'écoulement (17) qui est inférieur à 1.
  2. Injecteur selon la revendication 1, caractérisé en ce que le rapport entre le diamètre d'arrivée (16) et le diamètre d'écoulement (17) de l'étranglement d'arrivée (2) est supérieur à 1, et peut atteindre 1,3 au maximum.
  3. Injecteur selon la revendication 1 ou 2, caractérisé en ce que le rapport entre le diamètre d'arrivée (16) et le diamètre d'écoulement (17) de l'étranglement d'écoulement (11) est inférieur à 1 et peut atteindre jusqu'à 0,7 au minimum.
  4. Injecteur selon au moins une des revendications 1 à 3, caractérisé en ce que l'arête d'entrée de l'étranglement d'arrivée (2) est de forme arrondie.
EP01102406A 2000-02-17 2001-02-02 Injecteur pour injecter du carburant dans un moteur à combustion interne Expired - Lifetime EP1126160B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10007175 2000-02-17
DE10007175A DE10007175B9 (de) 2000-02-17 2000-02-17 Einspritzventil für die Einspritzung von Kraftstoff in eine Verbrennungskraftmaschine

Publications (3)

Publication Number Publication Date
EP1126160A2 EP1126160A2 (fr) 2001-08-22
EP1126160A3 EP1126160A3 (fr) 2003-09-24
EP1126160B1 true EP1126160B1 (fr) 2005-04-20

Family

ID=7631258

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01102406A Expired - Lifetime EP1126160B1 (fr) 2000-02-17 2001-02-02 Injecteur pour injecter du carburant dans un moteur à combustion interne

Country Status (2)

Country Link
EP (1) EP1126160B1 (fr)
DE (2) DE10007175B9 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10015740C2 (de) * 2000-03-29 2003-12-18 Siemens Ag Einspritzventil für die Einspritzung von Kraftstoff in eine Verbrennungskraftmaschine
DE10033428C2 (de) * 2000-07-10 2002-07-11 Bosch Gmbh Robert Druckgesteuerter Injektor zum Einspritzen von Kraftstoff
DE10152173A1 (de) * 2001-10-23 2003-04-30 Bosch Gmbh Robert Magnetventil zur Steuerung eines Einspritzventils
DE10254300A1 (de) * 2002-11-21 2004-06-03 Robert Bosch Gmbh Kraftstoffeinspritzventil einer Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine
DE102004037125A1 (de) * 2004-07-30 2006-03-23 Robert Bosch Gmbh Common-Rail-Injektor
DE102004042352B4 (de) 2004-08-20 2007-08-09 Siemens Ag Kraftstoffinjektor für eine Brennkraftmaschine
DE102004058715B4 (de) * 2004-12-06 2010-08-12 Continental Automotive Gmbh Kraftstoffinjektor für eine Brennkraftmaschine sowie Verfahren zur Herstellung eines Kraftstoffinjektors
DE102005001005B4 (de) 2005-01-07 2008-11-20 Continental Automotive Gmbh Stellantrieb zur Betätigung eines Kraftstoffeinspritzventils
DE102005034689B4 (de) 2005-07-25 2007-07-05 Siemens Ag Abdichtungsanordnung eines Piezoaktors in einem Kraftstoffinjektor
DE102006029966B4 (de) 2006-06-29 2010-04-22 Continental Automotive Gmbh Abdichtungsanordnung eines Piezoaktors für ein Kraftstoffeinspritzventil einer Brennkraftmaschine
DE102007009165A1 (de) 2007-02-26 2008-08-28 Robert Bosch Gmbh Kraftstoffinjektor mit einer zusätzlichen Ablaufdrossel oder mit einer verbesserten Anordnung derselben im Steuerventil
ATE523684T1 (de) * 2009-07-23 2011-09-15 Fiat Ricerche Brennstoffeinspritzvorrichtung mit mess- servoventil für einen verbrennungsmotor

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4572433A (en) * 1984-08-20 1986-02-25 General Motors Corporation Electromagnetic unit fuel injector
EP0192241B1 (fr) * 1985-02-19 1988-09-21 Nippondenso Co., Ltd. Soupape de commande pour régler le passage de fluide
ES2042184T3 (es) * 1985-12-02 1993-12-01 Marco Alfredo Ganser Dispositivo para el control de los inyectores de combustible de accionamiento electrohidraulico.
DE4340305C2 (de) * 1993-11-26 1998-02-19 Daimler Benz Ag Kraftstoffeinspritzdüse für eine Brennkraftmaschine
FI101739B (fi) * 1996-08-16 1998-08-14 Waertsilae Nsd Oy Ab Ruiskutusventtiilijärjestely
AT2545U1 (de) * 1998-01-27 1998-12-28 Avl List Gmbh Kraftstoffeinspritzsystem für eine brennkraftmaschine
DE19813983A1 (de) * 1998-03-28 1999-09-30 Bosch Gmbh Robert Ventil zum Steuern von Flüssigkeiten
GB2336627A (en) * 1998-04-24 1999-10-27 Lucas Ind Plc Fuel injector with biassing spring in blind bore in valve needle
DE19823937B4 (de) * 1998-05-28 2004-12-23 Siemens Ag Servoventil für Kraftstoffeinspritzventil
DE19859537A1 (de) * 1998-12-22 2000-07-06 Bosch Gmbh Robert Kraftstoffeinspritzventil

Also Published As

Publication number Publication date
DE10007175A1 (de) 2001-08-30
DE10007175C2 (de) 2002-05-29
DE10007175B9 (de) 2004-11-04
DE50105926D1 (de) 2005-05-25
EP1126160A2 (fr) 2001-08-22
EP1126160A3 (fr) 2003-09-24

Similar Documents

Publication Publication Date Title
EP1252432B1 (fr) Dispositif d'injection de carburant a commande directe pour un moteur a combustion interne a pistons
EP2171255B1 (fr) Étranglement au niveau du pointeau d'une soupape d'injection de carburant pour moteurs à combustion interne
EP1654455B1 (fr) Soupape de commande pour un injecteur de carburant contenant un multiplicateur de pression
EP0976924B1 (fr) Injecteur avec une servovalve
EP1126160B1 (fr) Injecteur pour injecter du carburant dans un moteur à combustion interne
AT501914B1 (de) Vorrichtung zum einspritzen von kraftstoff in den brennraum einer brennkraftmaschine
DE102007042466B3 (de) Einspritzsystem mit reduzierter Schaltleckage und Verfahren zum Herstellen eines Einspritzsystems
DE10100390A1 (de) Einspritzventil
EP1925812B1 (fr) Soupape d'injection de carburant pour moteurs à combustion interne
DE102006015745A1 (de) Kraftstoffinjektor mit direktgesteuertem Einspritzventilglied
EP1354133B1 (fr) Dispositif d'injection de carburant
EP1541859B1 (fr) Injecteur
WO2006058604A1 (fr) Injecteur de carburant
EP2022975B1 (fr) Injecteur
EP1483499A1 (fr) Systeme pour moduler en pression le comportement d'injection
DE10131642A1 (de) Kraftstoffinjektor mit variabler Steuerraumdruckbeaufschlagung
EP1908953B1 (fr) Dispositif d'injection de carburant
DE10015740C2 (de) Einspritzventil für die Einspritzung von Kraftstoff in eine Verbrennungskraftmaschine
DE102018200565A1 (de) Injektor zur Dosierung von gasförmigem Kraftstoff, Gaseinblassystem mit einem solchen Injektor und Verfahren zum Betreiben dieses Injektors
DE10050599B4 (de) Einspritzventil mit einem Pumpkolben
DD254752A1 (de) Kraftstoffeinspritzventil fuer brennkraftmaschinen
EP2655850B1 (fr) Injecteur de carburant pour moteurs à combustion interne
DE102007001365A1 (de) Injektor mit Steuer- und Schaltkammer
EP1210512B1 (fr) Injecteur
EP1176306A2 (fr) Système d'injection de combustible pour moteurs à combustion interne

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

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

17P Request for examination filed

Effective date: 20040216

17Q First examination report despatched

Effective date: 20040429

AKX Designation fees paid

Designated state(s): DE FR IT

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 FR IT

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REF Corresponds to:

Ref document number: 50105926

Country of ref document: DE

Date of ref document: 20050525

Kind code of ref document: P

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

ET Fr: translation filed
26N No opposition filed

Effective date: 20060123

REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

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

Ref country code: IT

Payment date: 20120223

Year of fee payment: 12

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

Ref country code: IT

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

Effective date: 20130202

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 16

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 17

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 18

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

Ref country code: DE

Payment date: 20190228

Year of fee payment: 19

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

Ref country code: FR

Payment date: 20190219

Year of fee payment: 19

REG Reference to a national code

Ref country code: DE

Ref legal event code: R081

Ref document number: 50105926

Country of ref document: DE

Owner name: VITESCO TECHNOLOGIES GMBH, DE

Free format text: FORMER OWNER: CONTINENTAL AUTOMOTIVE GMBH, 30165 HANNOVER, DE

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 50105926

Country of ref document: DE

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: 20200229

Ref country code: DE

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

Effective date: 20200901