EP1144862A1 - Injecteur de carburant haute pression dote d'un tiroir de distribution a commande hydraulique - Google Patents

Injecteur de carburant haute pression dote d'un tiroir de distribution a commande hydraulique

Info

Publication number
EP1144862A1
EP1144862A1 EP00979437A EP00979437A EP1144862A1 EP 1144862 A1 EP1144862 A1 EP 1144862A1 EP 00979437 A EP00979437 A EP 00979437A EP 00979437 A EP00979437 A EP 00979437A EP 1144862 A1 EP1144862 A1 EP 1144862A1
Authority
EP
European Patent Office
Prior art keywords
valve member
control valve
fuel injection
injection device
control
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
EP00979437A
Other languages
German (de)
English (en)
Other versions
EP1144862B1 (fr
Inventor
Jaroslaw Hlousek
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 EP1144862A1 publication Critical patent/EP1144862A1/fr
Application granted granted Critical
Publication of EP1144862B1 publication Critical patent/EP1144862B1/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
    • F02M57/00—Fuel-injectors combined or associated with other devices
    • 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
    • F02M63/0003—Fuel-injection apparatus having a cyclically-operated valve for connecting a pressure source, e.g. constant pressure pump or accumulator, to an injection valve held closed mechanically, e.g. by springs, and automatically opened by fuel pressure
    • F02M63/0005—Fuel-injection apparatus having a cyclically-operated valve for connecting a pressure source, e.g. constant pressure pump or accumulator, to an injection valve held closed mechanically, e.g. by springs, and automatically opened by fuel pressure using valves actuated by fluid 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
    • F02M2200/30—Fuel-injection apparatus having mechanical parts, the movement of which is damped
    • F02M2200/304—Fuel-injection apparatus having mechanical parts, the movement of which is damped using hydraulic means

Definitions

  • 3/2 way valves which include spool valves, the stroke movement of which influences the course of the injection.
  • the control spools perform stroke movements in the housing of a 3/2 way valve, whereby the seat surfaces and control edges of the control spool are exposed to high loads.
  • control spools which release and shut off the fuel supply to the injection nozzle, are enclosed in a housing.
  • Control spool and housing bores are designed with the smallest diameter tolerances in order to achieve the most accurate fuel metering possible and to minimize leakage losses.
  • the fuel is metered via the control edges on the outlet and inlet side and depends on the stroke of the control slide in the housing of the 3/2-way valve.
  • the mechanical loads on the seats are very high, since the movements of the control spool are largely undamped.
  • control spools in the 3/2-way valve housings only carry out small strokes, only a limited influence can be exerted due to the short stroke. Solution of the injection process take place. However, since the course of the fuel injection into an internal combustion engine is of great importance for the course and the completeness of the combustion within the cylinders, shaping the course of the injection appears to optimize the course of the combustion and to fully utilize the internal energy of the fuel as a process parameter dependent on the control stroke of the control valve member not acceptable.
  • an actuator provided above the upper control chamber can be actuated, as a result of which the pressure in the upper control chamber is reduced, which in turn moves the control slide into its upper end position.
  • the control valve member is preferably enclosed by a sleeve which is shrunk into the housing of the 3/2-way valve and is therefore easily replaceable in the event of a repair.
  • the housing of the injector can be made from inexpensive material, while in this variant only the sleeve can be made from high-quality material.
  • control edges that result between the sleeve shrunk into the housing of the 3/2-way valve and the shoulders of the control valve member are manufactured with close tolerances, so that minimal leakages occur.
  • the course of the injection can be controlled via a stroke-dependent throttling, for example the actuator above the upper control chamber is designed as a piezo actuator.
  • a step can be carried out on the control valve member below the inlet-side control edge, with which a throttle-side throttling can be achieved as a function of the stroke of the control valve member.
  • FIG. 1 shows the modular 3/2-way valve arrangement designed between the high-pressure accumulator and the injection nozzle
  • the 3/2-way valve unit 3 provided between high-pressure accumulator 1 (common rail) and injection nozzle 2 is arranged.
  • a supply line extends from a fuel tank 24 to a high-pressure pump 26, into which a return flow line 27 opens and which acts on a high-pressure accumulator 1 with fuel under high pressure.
  • Supply lines 28 extend from the high-pressure accumulator 1 to the respective 3/2-way valve units 3, one of which is shown in more detail here.
  • the upper end region of the control valve member 5 with the stepped diameters 22, 6 projects into the control chamber 17. If this is closed by the de-energized actuator 4 and the 2/2-way valve 55, the diameter stage 22, 6 acts as a hydraulic damping element for the control valve member 5.
  • the inlet-side control edges 19, 19 ' which releases the inlet-side inlet opening to the high-pressure line 9 to the injection nozzle 2 when the control valve member 5 moves upward by relieving the pressure in the control chamber 17.
  • the fuel under high pressure enters the sleeve 15 through the supply line 28 and enters the high-pressure line 9 through the opening released by the control edges 19, 19 '.
  • the control valve member 5 assumes the position shown in FIG. 1; the control edges 20, 20 ′ on the inlet side are open, the fuel can enter the relief line 13 through the control bore 11, the overflow channel 12 in the lower region of the control valve member 5, which in turn opens into the fuel tank 24.
  • the part of the control valve member 5 which receives the overflow channel 12 is embodied in a diameter 7, which is enclosed by the sleeve 15, which is embodied in a diameter 7 ', as a result of which the narrowest tolerances and thus the lowest leakage losses can be achieved.
  • a further diameter area 21 is embodied, which has a slightly smaller diameter 21 than the diameter 7.
  • a dual diameter step 7, 21 is formed in the lower end region, which acts as a damping element on the downward movement of the control valve member 5 and counteracts the premature wear on the lower stop of the sleeve 15.
  • the connection between the high-pressure accumulator 1 (common rail) and the injection nozzle 2 remains interrupted.
  • the fuel under high pressure via the supply line 28 is present at the control valve member 5.
  • the narrow fit 7, 7 'in the area of the control edges 19, 19' blocks the inlet opening into the high-pressure line 9 to the injection nozzle 2.
  • the nozzle chamber 2 together with the relief line 13, the overflow channel 12, the control bore 12 and the bores 10 and the high pressure line 9 remain depressurized. If the control chamber 17 is released after actuating the actuator 4 by actuating the 2/2-way valve 55 and opening the valve throttle 16, the control valve member 5 moves upward onto the system area 18 to.
  • the stepped diameter 6, 22 dampens the stroke movement of the control valve member 5 when approaching the upper flat annular surface of the stop 18.
  • the flow cross-section on the diameter 6, ie the play between the control valve member 5 and the guide sleeve 15 is smaller than the cross-section of the valve throttle 16 in the upper stop 18.
  • the outlet-side control edges 20, 20 ' close the outlet opening while the inlet-side control edges 19, 19 'clear the inlet opening in the high-pressure line 9.
  • the stepped diameter 6, 22 During the upward lifting movement of the control valve member 5, its stop on the annular surface 18 is damped by the stepped diameter 6, 22.
  • the control valve 5 moves in the direction of the lower stop 8 and closes, since the high pressure is also present in the control chamber 17, the inlet openings into the high-pressure line 9 through the downward movements Control edges 19, 19 '.
  • the control valve member 5 moves downward, the fuel overflows via the control bore 11, the overflow channel 12 into the relief line 13 leading to the storage tank 24.
  • the downward movement of the control valve member 5 is damped by the graduated diameters 17, 22 in the damping chamber 29 in the lower region of the sleeve 15 have an equally damping effect on the lifting movement of the control valve member 5 in the sleeve 15 surrounding it.
  • the 3/2-way valve 3 according to the invention can be accommodated directly in the injector or can be designed as an assembly unit which can be installed between the high-pressure accumulator 1 (common rail) and the injection nozzle 2.
  • a control valve member 5, which is movable in a shrunk-in sleeve 15, is shown with the inlet-side step 23 forming the injection course.
  • a step 23 is shown, for example, tapering conically in the direction of the lower stop 8, with which the course of the injection can be influenced by throttling as a function of the stroke of the control valve member 5.
  • a further shaping and influencing of the injection process could be realized by a variable throttling on the 2/2 way valve 55, for example by a piezo actuator.
  • the system pressure in the first opening phase can be reduced by suitably arranging the control edges 19, 19 'on the inlet side and the control edges 20, 20' on the outlet side.
  • a safeguard against the occurrence of an undesirable, uncontrollable entry quantity can be done in that the control valve 5 is not moved to the stop 18 during normal operation, but that the contact between the upper region of the control valve member 5 and the annular surface 18 only in the event of failure of the actuator 4 or the 2/2 way valve 55.
  • the control bore 11 can move into the position denoted by 11 ′, as a result of which pressure relief of the injection nozzle 2 can take place by outflowing of fuel under high pressure via the overflow channel 12 and the pressure relief line 13 into the storage tank 24.
  • control components 4, 55 fail, the remaining components are protected against excessive mechanical loads.

Landscapes

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

Abstract

L'invention concerne un dispositif d'injection de carburant destiné à des moteurs à combustion interne. Un réservoir haute pression (Common Rail) peut être relié à un gicleur (2) par un distributeur 3/2 (3). Le distributeur 3/2 (3) présente un obturateur (5) qui relie une conduite d'alimentation (28) à une conduite haute pression (9) ou à une conduite de décharge (13) aboutissant dans un réservoir (24). L'obturateur (5) est doté, à ses extrémités, opposées aux butées (8, 18), d'éléments (7, 21; 6, 22) amortissant la course de l'obturateur (5).
EP00979437A 1999-10-21 2000-10-20 Injecteur de carburant haute pression dote d'un tiroir de distribution a commande hydraulique Expired - Lifetime EP1144862B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19950779 1999-10-21
DE19950779A DE19950779A1 (de) 1999-10-21 1999-10-21 Hochdruckkraftstoffinjektor mit hydraulisch gesteuertem Steuerschieber
PCT/DE2000/003692 WO2001029410A1 (fr) 1999-10-21 2000-10-20 Injecteur de carburant haute pression dote d'un tiroir de distribution a commande hydraulique

Publications (2)

Publication Number Publication Date
EP1144862A1 true EP1144862A1 (fr) 2001-10-17
EP1144862B1 EP1144862B1 (fr) 2007-07-11

Family

ID=7926445

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00979437A Expired - Lifetime EP1144862B1 (fr) 1999-10-21 2000-10-20 Injecteur de carburant haute pression dote d'un tiroir de distribution a commande hydraulique

Country Status (8)

Country Link
US (1) US6382189B1 (fr)
EP (1) EP1144862B1 (fr)
JP (1) JP2003512565A (fr)
KR (1) KR100703921B1 (fr)
CN (1) CN1179123C (fr)
DE (2) DE19950779A1 (fr)
RU (1) RU2256816C2 (fr)
WO (1) WO2001029410A1 (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19947779A1 (de) * 1999-10-02 2001-04-12 Bosch Gmbh Robert Brennstoffeinspritzventil
DE19951554A1 (de) * 1999-10-26 2001-05-10 Bosch Gmbh Robert Kraftstoffinjektor mit integrierter Durchflussbegrenzung
DE10020867B4 (de) * 2000-04-28 2006-07-06 Robert Bosch Gmbh Common-Rail-Injektor
DE10031574B4 (de) * 2000-06-29 2008-12-04 Robert Bosch Gmbh Druckgesteuerter doppelschaltender Hochdruckinjektor
DE10032924A1 (de) * 2000-07-06 2002-01-24 Bosch Gmbh Robert Kraftstoffeinspritzvorrichtung für Brennkraftmaschinen
DE10060812A1 (de) * 2000-12-07 2002-06-13 Bosch Gmbh Robert Kraftstoffeinspritzsystem für Brennkraftmaschinen
DE10157411A1 (de) * 2001-11-23 2003-06-26 Bosch Gmbh Robert Injektor zur Hochdruckeinspritzung von Kraftstoff
DE10209527A1 (de) * 2002-03-04 2003-09-25 Bosch Gmbh Robert Einrichtung zur druckmodulierten Formung des Einspritzverlaufes
US7278593B2 (en) * 2002-09-25 2007-10-09 Caterpillar Inc. Common rail fuel injector
US7174717B2 (en) * 2003-12-24 2007-02-13 Pratt & Whitney Canada Corp. Helical channel fuel distributor and method
DE102004054589B4 (de) * 2004-11-11 2008-09-11 Continental Automotive Gmbh Steuerventil und Einspritzventil
DE102006007574A1 (de) * 2006-02-18 2007-08-30 Man Diesel Se Steuerventil eines Einspritzinjektors für Schwerölbetrieb
DE102008035087B4 (de) * 2008-07-28 2015-02-12 Continental Automotive Gmbh Einspritzventil
BRPI0920307A2 (pt) * 2008-10-10 2016-02-23 Bosch Gmbh Robert sistema de abastecimento de combustível para sistemas de injeção de barra comum de óleo pesado
CN106286055B (zh) * 2015-05-19 2019-05-24 上海夏雪科技有限公司 流体分配器

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2703722C2 (de) * 1977-01-29 1986-09-04 Audi AG, 8070 Ingolstadt Kraftstoff-Einspritz-Anlage
GB8729087D0 (en) * 1987-12-12 1988-01-27 Lucas Ind Plc Control valve
JPH03118254A (ja) * 1989-09-29 1991-05-20 Daihatsu Motor Co Ltd 車両におけるシートの取付構造
DE4142998C1 (fr) * 1991-12-24 1993-07-22 Robert Bosch Gmbh, 7000 Stuttgart, De
JP3099546B2 (ja) * 1992-09-16 2000-10-16 トヨタ自動車株式会社 燃料噴射弁
US5499608A (en) * 1995-06-19 1996-03-19 Caterpillar Inc. Method of staged activation for electronically actuated fuel injectors
US5954487A (en) * 1995-06-23 1999-09-21 Diesel Technology Company Fuel pump control valve assembly
DE19701879A1 (de) * 1997-01-21 1998-07-23 Bosch Gmbh Robert Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen
DE19708104A1 (de) * 1997-02-28 1998-09-03 Bosch Gmbh Robert Magnetventil
DE19715234A1 (de) * 1997-04-12 1998-06-25 Daimler Benz Ag Magnetventilgesteuertes direkteinspritzendes Kraftstoffeinspritzventil für Speichereinspritzsysteme von mehrzylindrigen Brennkraftmaschinen
DE19716220B4 (de) * 1997-04-18 2007-08-23 Robert Bosch Gmbh Kraftstoffeinspritzeinheit für Brennkraftmaschinen
DE19732070C2 (de) * 1997-07-25 2001-02-01 Daimler Chrysler Ag Direkteinspritzendes Kraftstoffeinspritzventil mit Magnetventilsteuerung für eine mehrzylindrige Brennkraftmaschine
DE19742073A1 (de) * 1997-09-24 1999-03-25 Bosch Gmbh Robert Kraftstoffeinspritzvorrichtung für Brennkraftmaschinen
DE19749001A1 (de) * 1997-11-06 1999-05-27 Daimler Chrysler Ag Speichereinspritzsystem für eine mehrzylindrige Brennkraftmaschine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0129410A1 *

Also Published As

Publication number Publication date
US6382189B1 (en) 2002-05-07
WO2001029410A1 (fr) 2001-04-26
CN1179123C (zh) 2004-12-08
DE19950779A1 (de) 2001-04-26
CN1327516A (zh) 2001-12-19
DE50014473D1 (de) 2007-08-23
KR20010093168A (ko) 2001-10-27
EP1144862B1 (fr) 2007-07-11
KR100703921B1 (ko) 2007-04-05
JP2003512565A (ja) 2003-04-02
RU2256816C2 (ru) 2005-07-20

Similar Documents

Publication Publication Date Title
DE69520464T2 (de) Kraftstoffeinspritzventil und Verfahren zum Einstellen des Nadelhubes eines Kraftstoffeinspritzventils
DE4332119A1 (de) Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen
DE19519191A1 (de) Einspritzventil
EP1144862A1 (fr) Injecteur de carburant haute pression dote d'un tiroir de distribution a commande hydraulique
DE4302668A1 (de) Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen
EP0657643B1 (fr) Dispositif d'injection de combustible pour moteurs à combustion interne
EP2102486B1 (fr) Injecteur avec une soupape de commande à compensation de pression axiale
CH671609A5 (de) Vorrichtung zum verhindern eines uebermaessigen durchflusses von gasfoermigem brennstoff durch eine einspritzduese eines dieselmotors.
DE19618698A1 (de) Kraftstoffeinspritzventil für Brennkraftmaschinen
WO2008061844A1 (fr) Injecteur de carburant
EP2100026A1 (fr) Injecteur de carburant avec électrovanne à siège sphérique
WO2008049699A1 (fr) Injecteur de carburant
CH686845A5 (de) Steueranordnung fuer ein Einspritzventil fuer Verbrennungskraftmaschinen.
WO2005015000A1 (fr) Soupape de commande a compensation de pression pour un injecteur de carburant comprenant un multiplicateur de pression
EP1404961A1 (fr) Injecteur de carburant avec mise en forme de la courbe d'injection au moyen d'elements d'etranglement commandes
EP1379779A2 (fr) Soupape a siege/coulisse comportant une tige de compensation de pression
EP1920156A1 (fr) Systeme d'injection de carburant pour un moteur a combustion interne
EP1277952B1 (fr) Injecteur avec soupapes ouvrantes vers l'intérieur disposées l'une derrière l'autre
WO2010023009A1 (fr) Injecteur de carburant comportant une électrovanne
WO2002059475A1 (fr) Distributeur 3/2
DE102006047935A1 (de) Kraftstoffinjektor für eine Brennkraftmaschine
WO2003004863A1 (fr) Injecteur de carburant a commande de distributeur a 2 voies
DE10154576C1 (de) Kraftstoffinjektor mit düsennaher Magnetventilanordnung
DE10026642A1 (de) Einspritzventil mit einem Zulaufventil zu einer Arbeitskammer
DE10357769A1 (de) Kraftstoffeinspritzventil

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: A1

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

17P Request for examination filed

Effective date: 20011026

RBV Designated contracting states (corrected)

Designated state(s): DE FR GB IT

17Q First examination report despatched

Effective date: 20060306

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 GB IT

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REF Corresponds to:

Ref document number: 50014473

Country of ref document: DE

Date of ref document: 20070823

Kind code of ref document: P

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20071024

ET Fr: translation filed
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

26N No opposition filed

Effective date: 20080414

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

Ref country code: FR

Payment date: 20121113

Year of fee payment: 13

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

Ref country code: IT

Payment date: 20121026

Year of fee payment: 13

Ref country code: GB

Payment date: 20121023

Year of fee payment: 13

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

Ref country code: DE

Payment date: 20121217

Year of fee payment: 13

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

Effective date: 20131020

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 50014473

Country of ref document: DE

Effective date: 20140501

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: 20131020

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20140630

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: 20131020

Ref country code: FR

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

Effective date: 20131031

Ref country code: DE

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

Effective date: 20140501