EP1673532B1 - Alimentation haute pression pour injection a rampe commune - Google Patents

Alimentation haute pression pour injection a rampe commune Download PDF

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Publication number
EP1673532B1
EP1673532B1 EP04786800A EP04786800A EP1673532B1 EP 1673532 B1 EP1673532 B1 EP 1673532B1 EP 04786800 A EP04786800 A EP 04786800A EP 04786800 A EP04786800 A EP 04786800A EP 1673532 B1 EP1673532 B1 EP 1673532B1
Authority
EP
European Patent Office
Prior art keywords
actuator
inlet
valve
chamber
actuator chamber
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 - Fee Related
Application number
EP04786800A
Other languages
German (de)
English (en)
Other versions
EP1673532A1 (fr
Inventor
Giovanni Ferraro
Kasim-Melih Hamutcu
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 EP1673532A1 publication Critical patent/EP1673532A1/fr
Application granted granted Critical
Publication of EP1673532B1 publication Critical patent/EP1673532B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/0603—Injectors peculiar thereto with means directly operating the valve needle using piezoelectric or magnetostrictive operating means
    • 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/002—Arrangement of leakage or drain conduits in or from injectors
    • 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/004—Joints; Sealings
    • F02M55/005—Joints; Sealings for high pressure conduits, e.g. connected to pump outlet or to injector inlet
    • 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
    • F02M63/0012—Valves
    • F02M63/0014—Valves characterised by the valve actuating means
    • F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
    • F02M63/0026—Valves characterised by the valve actuating means electrical, e.g. using solenoid using piezoelectric or magnetostrictive actuators
    • 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
    • F02M2200/16—Sealing of fuel injection apparatus not otherwise provided for
    • 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
    • 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

Definitions

  • the invention relates to a valve for controlling fluids, having a valve housing, which has an actuator chamber and a laterally arranged inlet bore communicating with a high-pressure inlet, wherein the actuator chamber has an actuator with a punch and an Aktorkuppe, wherein the actuator chamber a cone seal has, which is formed by means of a conical surface at the end of the actuator chamber and a corresponding annular sealing surface on the Aktorkuppe, wherein the cable seal a cable outlet is sealable.
  • Such valves are from the EP 0 192 241 known.
  • the injection valves in particular in common rail injection systems, are provided with servo valves for controlling the fluid flows.
  • storage injection systems are used, which operate at very high injection pressures.
  • Such injection systems are known as common rail systems for diesel engines and HPDI injection systems for gasoline engines.
  • the fuel with a high-pressure pump in one promoted common accumulator from which the injectors are supplied to the individual cylinders with fuel.
  • the opening and closing of the injectors is usually controlled electronically.
  • a fuel injector for injecting fuel into the combustion chamber of an engine with a valve housing wherein in the valve housing, an actuator space is formed in which a piezoelectric actuator is arranged.
  • the actuator chamber leads an inlet bore, which is in communication with a high-pressure applied common-rail system.
  • the actuator has an Aktorkuppe with which the actuator is hydraulically tightly sealed with a formed on the actuator space sealing surface and by means of an additional sealing ring, so that within the sealing ring, the cable of the actuator can be led out of the valve housing.
  • Another fuel injector with a piezo actuator goes off WO 03/040538 A1 out.
  • the piezoelectric actuator is not exposed to the high pressure of the fuel inlet, but arranged within a low-pressure space. In this respect, no sealing problems of the actuator space in the region of the cable outlet of the piezoelectric actuator occur here. From the high-pressure connection, two supply bores lead directly into a nozzle needle pressure chamber, from which the fuel is injected through injection openings.
  • the actuator space has at least one additional inlet bore, which allows a distribution of the force on the Aktorkuppe and / or the punch.
  • the inlet bores are arranged symmetrically about the longitudinal axis of the actuator. This has the advantage that the forces are introduced uniformly, which has a favorable effect on the sealing function of the conical seal and the construction of the actuator.
  • a particularly cost-effective variant provides that the high pressure inlet is arranged centrally, along the central axis of the valve housing.
  • the cost advantage results from the simplified manufacturability of the centric bore.
  • the inlet bores extend at an acute angle to the central axis of the valve housing. This has the advantage that the injector wall thickness is increased by the acute-angled arrangement of the inlet bores and gives a greater overall strength.
  • a cross-sectional widening is arranged between the inlet bores and the high-pressure inlet. This cross-sectional extension forms a high pressure chamber and unsupported while a uniform distribution of the amount of fuel through the individual inlet holes.
  • the valve 1 has a valve housing 10 in which extends in the longitudinal direction of a pressure bore, which forms an actuator chamber 11.
  • an actuator 30 is mounted, which has a punch 31 and an Aktorkuppe 32.
  • the actuator chamber 11 is sealed at its one end by means of a conical seal to a cable outlet 17.
  • the conical seal is by means of a conical surface 14 at the end of Aktorraums 11 and a corresponding annular sealing surface 33 formed on the Aktorkuppe 32.
  • the actuator 30 may be formed as a piezoelectric actuator unit.
  • the operating principle provides that due to electrical voltage pulses, which are supplied to the actuator 30 via a cable due to changes in length of the punch 31 of the actuator 30, a valve opening which is located on the conical surface 14 opposite end of the valve housing 10 (not shown in the figure).
  • the fuel can be injected into the combustion chamber of an internal combustion engine.
  • the connection between cable outlet 17 and actuator 30 is realized by an obliquely to the longitudinal axis of the valve housing 10 extending bore 16, which forms a blending area with a blind bore 15.
  • more than two inlet bores can be provided, which are arranged symmetrically about the longitudinal axis of the actuator 30, preferably at equal angular intervals.
  • Particularly preferred embodiments have two inlet bores 13 which, relative to the longitudinal axis of the actuator 30 are opposite or three inlet bores 13, which, relative to the longitudinal axis of the actuator 30 are arranged at an angle of 120 °.

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 une soupape (1) actionnant des liquides et comprenant une cage de soupape (10) dotée d'une chambre d'actionneur (11) et d'un alésage d'alimentation (13) latéral relié à une alimentation haute pression (12). Un actionneur (30) pourvu d'un piston (31) et d'une coupole (32) se trouve dans la chambre d'actionneur (11), laquelle comporte un joint conique formé par une surface conique (14) à l'extrémité de la chambre d'actionneur (11) et par une surface d'étanchéité annulaire (33) correspondante sur la coupole (32), ce joint conique servant à l'étanchéité d'un départ de câble (17). La chambre d'actionneur (11) est également dotée d'au moins un alésage d'alimentation (13) supplémentaire qui permet d'homogénéiser l'introduction de la force sur l'actionneur (30).

Claims (7)

  1. Soupape (1) pour commander des liquides comportant un boîtier (10) ayant une chambre d'actionneur (11) et un perçage d'alimentation (13), latéral, communiquant avec une arrivée haute pression (12),
    la chambre d'actionneur (11) comportant un actionneur (30) muni d'un poinçon (31) et d'une coupelle d'actionneur (32),
    la chambre d'actionneur (11) ayant un joint conique réalisé par une surface conique (14) à l'extrémité de la chambre d'actionneur (11) et d'une surface d'étanchéité (33), de forme annulaire, correspondante, sur la coupelle d'actionneur (32) et
    le joint conique fermant une sortie de câble (17),
    caractérisée en ce que
    la chambre d'actionneur (11) comporte au moins un perçage d'alimentation (13) supplémentaire et
    les perçages d'alimentation (13) sont répartis symétriquement autour de l'axe longitudinal de l'actionneur (30).
  2. Soupape selon la revendication 1,
    caractérisée en ce que
    les perçages d'alimentation (13) débouchent dans la région de la surface conique (14) au-delà de la surface d'étanchéité annulaire (33) dans la chambre d'actionneur (11).
  3. Soupape selon au moins l'une des revendications 1 et 2,
    caractérisée en ce que
    l'alimentation haute pression (12) est centrée suivant l'axe médian du boîtier de soupape (10).
  4. Soupape selon au moins l'une des revendications 1 à 3,
    caractérisée en ce que
    les perçages d'alimentation (13) font un angle aigu par rapport à l'axe du boîtier de soupape (10).
  5. Soupape selon au moins l'une des revendications 1 à 4,
    caractérisée en ce que
    les sections des perçages d'alimentation (13) sont réduites par rapport à la section d'un unique perçage d'alimentation (13).
  6. Soupape selon au moins l'une des revendications 1 à 5,
    caractérisée par
    une extension de section (18) entre les perçages d'alimentation (13) et l'alimentation haute pression (12).
  7. Soupape selon au moins l'une des revendications 1 à 6,
    caractérisée en ce que
    l'actionneur (30) est une unité d'actionneur piézo-électrique.
EP04786800A 2003-10-06 2004-09-17 Alimentation haute pression pour injection a rampe commune Expired - Fee Related EP1673532B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10346243A DE10346243A1 (de) 2003-10-06 2003-10-06 Hochdruckzulauf für ein Common Rail Injektor
PCT/DE2004/002081 WO2005040596A1 (fr) 2003-10-06 2004-09-17 Alimentation haute pression pour injection a rampe commune

Publications (2)

Publication Number Publication Date
EP1673532A1 EP1673532A1 (fr) 2006-06-28
EP1673532B1 true EP1673532B1 (fr) 2008-03-19

Family

ID=34399261

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04786800A Expired - Fee Related EP1673532B1 (fr) 2003-10-06 2004-09-17 Alimentation haute pression pour injection a rampe commune

Country Status (7)

Country Link
US (1) US20070040137A1 (fr)
EP (1) EP1673532B1 (fr)
JP (1) JP4226034B2 (fr)
KR (1) KR20060120001A (fr)
CN (1) CN100476193C (fr)
DE (2) DE10346243A1 (fr)
WO (1) WO2005040596A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010196544A (ja) * 2009-02-24 2010-09-09 Yanmar Co Ltd 燃料噴射ノズル

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3660781D1 (en) 1985-02-19 1988-10-27 Nippon Denso Co Control valve for controlling fluid passage
US5025766A (en) * 1987-08-24 1991-06-25 Hitachi, Ltd. Fuel injection valve and fuel supply system equipped therewith for internal combustion engines
JPH03156165A (ja) * 1989-11-09 1991-07-04 Yamaha Motor Co Ltd 高圧燃料噴射装置の給電線取出構造
IT220661Z2 (it) * 1990-10-31 1993-10-08 Elasis Sistema Ricerca Fita Nel Mezzogiorno Soc.Consortile P.A. Perfezionamenti al sistema di tenuta ad alta pressione della valvola pilota di un iniettore elettromagnetico per sistemi di iniezione del combustibile di motori a combustione interna
US5288025A (en) * 1992-12-18 1994-02-22 Chrysler Corporation Fuel injector with a hydraulically cushioned valve
US5329908A (en) * 1993-06-08 1994-07-19 Cummins Engine Company, Inc. Compressed natural gas injection system for gaseous fueled engines
US5553781A (en) * 1995-01-03 1996-09-10 Servojet Products International Conversion of jerk type injector to accumulator type injector
DE19650865A1 (de) 1996-12-07 1998-06-10 Bosch Gmbh Robert Magnetventil
GB9925753D0 (en) * 1999-10-29 1999-12-29 Lucas Industries Ltd Fuel injector
EP1174615B1 (fr) * 2000-07-18 2007-01-31 Delphi Technologies, Inc. Injecteur de combustible
DE10153629B4 (de) * 2001-10-31 2019-10-31 Robert Bosch Gmbh Verfahren zum Einspritzen von Brennstoff

Also Published As

Publication number Publication date
CN100476193C (zh) 2009-04-08
WO2005040596A1 (fr) 2005-05-06
KR20060120001A (ko) 2006-11-24
JP2006525458A (ja) 2006-11-09
EP1673532A1 (fr) 2006-06-28
DE502004006608D1 (de) 2008-04-30
DE10346243A1 (de) 2005-04-28
US20070040137A1 (en) 2007-02-22
JP4226034B2 (ja) 2009-02-18
CN1864006A (zh) 2006-11-15

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