EP1030966A1 - Soupape d'injection de carburant pour injection haute pression avec commande amelioree de l'amenee de carburant - Google Patents

Soupape d'injection de carburant pour injection haute pression avec commande amelioree de l'amenee de carburant

Info

Publication number
EP1030966A1
EP1030966A1 EP99938131A EP99938131A EP1030966A1 EP 1030966 A1 EP1030966 A1 EP 1030966A1 EP 99938131 A EP99938131 A EP 99938131A EP 99938131 A EP99938131 A EP 99938131A EP 1030966 A1 EP1030966 A1 EP 1030966A1
Authority
EP
European Patent Office
Prior art keywords
throttle
fuel injection
fuel
injection valve
pressure
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
EP99938131A
Other languages
German (de)
English (en)
Other versions
EP1030966B1 (fr
Inventor
Lorenz Betz
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 EP1030966A1 publication Critical patent/EP1030966A1/fr
Application granted granted Critical
Publication of EP1030966B1 publication Critical patent/EP1030966B1/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
    • 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
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/28—Details of throttles in fuel-injection apparatus
    • 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
    • F02M2547/00—Special features for fuel-injection valves actuated by fluid pressure
    • F02M2547/003—Valve inserts containing control chamber and valve piston

Definitions

  • Fuel injection valve for high pressure injection with improved control of the fuel supply
  • the invention relates to a fuel injection valve for high-pressure injection of fuel from a high-pressure accumulator into a combustion chamber of a ner internal combustion engine according to the preamble of claim 1.
  • Such a fuel injector is described in DE 196 19 523 AI.
  • the control of the injection takes place electro-hydraulically, in that fuel is fed from the high-pressure accumulator to a control chamber under high pressure.
  • This control pressure now holds the valve member of the fuel injection valve in the closed position.
  • the control room is permanently connected to the high-pressure accumulator, namely throttled, and can be relieved via a further throttle with a throttle duct section.
  • This latter choke is controlled by a solenoid valve.
  • the fuel injection valve furthermore has a relief line which leads away from the electromagnet of the solenoid valve and via which the fuel cutoff quantity can flow off at the throttle mentioned to a relief area.
  • the throttle which can be controlled by means of the solenoid valve and which seals or opens the side of the fuel injection valve to the relief line and connects the control chamber to one another, has two cylindrical channel sections.
  • the first channel section which represents the actual throttle cross section, is long in terms of its diameter and opens with a cross-sectional jump into the second cylindrical section, which has a considerably larger cross section, and connects the actual thin long throttle channel section to the control chamber.
  • the flow of the fuel has sufficient time to develop in such a way that the fuel deposits on the duct walls.
  • this is associated with considerable flow losses.
  • the path was followed by lapping the duct walls of these throttle duct cross sections in order to reduce their roughness.
  • This represents a high technological effort, which is associated with high manufacturing costs.
  • very narrow DrosseUcanal cross-sections such surface finishing, taking reasonable costs into account, reaches the limits of technical feasibility.
  • the object of the invention is therefore to provide a fuel injection valve, the throttle between the solenoid valve and the control chamber can be produced with little manufacturing outlay and low flow losses.
  • the fuel injection valve according to the invention for the high-pressure injection of fuel from a high-pressure accumulator into a Brennraur ⁇ of an internal combustion engine, in particular a diesel engine, has a solenoid valve, by means of which the fuel pressure in a control chamber via a throttle, which walls at least one channel having throttle channel section, relieved, which corresponds to the injection position of the fuel injection valve, or can be built up, which corresponds to the closed position of the fuel injection valve or the non-injection position.
  • the throttle channel section is essentially designed in the form of an aperture.
  • the flow in the throttle duct cross section is consciously influenced by the fact that the actual throttle duct section is so short that its effect resembles an orifice in which, when flowing through, the duct sections upstream of the diaphragm and those of the Aperture downstream fuel injection valves are essentially not touched by the flow on their channel walls.
  • this results in a lower flow resistance, so that the control behavior of the fuel injection valve can be significantly improved.
  • this eliminates the fact that the throttle channel cross-section acts as an aperture is formed, the elaborate surface finishing in the otherwise relatively narrow flow channels. This can reduce manufacturing costs.
  • the influence of the manufacturing accuracy on the flow behavior in such a throttle is reduced, since the flow through the immediate throttle area is essentially independent of the surface design of the other duct walls of the throttle.
  • the throttle channel section preferably has such a 1 / d ratio that cavitation occurs intentionally. Even with a special geometric design, in particular a short length, it is achieved according to this exemplary embodiment that the flow when the flow through the actual throttle duct section does not essentially contact the duct walls, as a result of which the flow losses are reduced.
  • the throttle channel section preferably has a 1 / d ratio in the range from 0.1 to ⁇ 2, in particular in the range from 1.0 to 1.5.
  • a 1 / d ratio in the range from 0.1 to ⁇ 2, in particular in the range from 1.0 to 1.5.
  • the throttle channel section takes the form of a throttle diaphragm, in particular in the case of very small 1 / d ner ratios.
  • the throttle duct section has a transverse area with transverse sectional expansion in the direction of the control room on a rounded area, which is in particular HE-rounded. Due to the rounded design of the transition area, the beam constriction is reduced, which further reduces the flow losses when flowing through the actual throttle cross-section or the throttle diaphragm.
  • the throttle is preferably provided with a first throttle duct, which can be closed by means of a closing element of the solenoid valve, and a second throttle duct, which opens into the control chamber, the orifice-shaped throttle duct section or the throttle diaphragm between the first throttle duct and the second throttle duct having an essentially axial one Alignment is arranged to each other.
  • the diameters of the throttle ducts are designed so that the flow losses are kept relatively low, and the diaphragm-shaped throttle duct section between the two throttle ducts is so short that it takes the form of a throttle diaphragm.
  • Fig. 1 is a cross-sectional view of a fuel injection valve for high pressure injection to explain the principle thereof
  • FIG. 2 shows an enlarged sectional view of the area of the fuel injection valve according to FIG. 1, in which the throttle is arranged with the diaphragm-shaped throttle duct section according to the invention.
  • 1 shows a longitudinal section through a fuel injection valve for high-pressure injection of fuel with a solenoid valve 2 integrated therein.
  • the valve size 17 of the fuel injection valve 1 is a nozzle needle 11 with a conical sealing surface known per se, which comes into contact with a conical valve seat in the closed state. Injection bores, which are the actual nozzle, extend from this valve seat
  • the nozzle needle 11 is acted upon by a compression spring 16 in the closing direction on the valve seat.
  • the nozzle needle 11 furthermore has a pressure shoulder 15, in the area of which a pressure chamber 14 is provided in the nozzle body 12, which is connected to a high-pressure inlet line 26, via which high-pressure fuel from a high-pressure connection 18, preferably with a pressure of 120 MPa the pressure chamber
  • a valve tappet 25 also acts on the nozzle needle 11, which limits the end face of a control chamber 3 in an insert part 21 in the valve housing 17 of the fuel injection valve 1. From the high-pressure connection 18, this control chamber 3 has an inlet with a high-pressure throttle 19 and an outlet to a relief line 24 with the throttle 4 according to the invention, which is controlled by a valve member 27 of the solenoid valve 2.
  • the solenoid valve 2 has a spring 20 acting in the closing direction and a solenoid 22 which is activated when energized Tighten the valve member 27, whereby the throttle 4 is opened.
  • an E connection 23 is also provided for the power supply of the solenoid valve 2.
  • the throttle 4 has a first throttle duct 8, which can be closed by means of a spherical closing element 9, which can be actuated by the solenoid valve 2, a throttle duct section 5, which is designed in the form of an aperture, and a second throttle duct 10.
  • the transition of the throttle duct section 5 is designed as a rounded transition region 6 in order to counteract beam constriction.
  • the second throttle duct 10 opens into the control chamber 3, in which the valve tappet 25 is located, which can be acted upon with fuel pressure by corresponding pressure in the control chamber 3.
  • the solenoid valve-controlled throttle 4 according to the invention is arranged within the valve housing 17.
  • the throttle duct section 5 has such a short length or such a 1 / d ratio that it acts as a throttle diaphragm, and in that the transition region from this throttle duct section 5 into the second throttle duct 10 is designed as a rounded transition region 6, and by the fact that the geometric relationships of the individual throttle channels or throttle channel sections and the radii of the rounded transition region 6 can be coordinated with one another, the formation of the flow through the throttle along all the channel sections or throttle channels can be optimized with a view to optimal control of the fuel injection valve 1 .

Landscapes

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

Abstract

L'invention concerne une soupape d'injection permettant une injection haute pression de carburant, à partir d'une accumulation haute pression, dans une chambre de combustion d'un moteur à combustion interne, en particulier d'un moteur diesel. La soupape d'injection de carburant comporte une électrovanne qui sert à relâcher la pression de carburant (position d'injection) ou à faire monter la pression de carburant (position de fermeture) dans une chambre de commande (3), par l'intermédiaire d'un élément à étranglement (4) présentant au moins une section de canal d'étranglement (5) définie par des parois de canal. Selon l'invention, la section de canal d'étranglement (5) se présente sensiblement sous la forme d'un obturateur ou d'un diaphragme d'étranglement.
EP99938131A 1998-06-18 1999-06-05 Soupape d'injection de carburant pour injection haute pression avec commande amelioree de l'amenee de carburant Expired - Lifetime EP1030966B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19827267 1998-06-18
DE19827267A DE19827267A1 (de) 1998-06-18 1998-06-18 Kraftstoff-Einspritzventil für Hochdruck-Einspritzung mit verbesserter Steuerung der Kraftstoffzufuhr
PCT/DE1999/001649 WO1999066191A1 (fr) 1998-06-18 1999-06-05 Soupape d'injection de carburant pour injection haute pression avec commande amelioree de l'amenee de carburant

Publications (2)

Publication Number Publication Date
EP1030966A1 true EP1030966A1 (fr) 2000-08-30
EP1030966B1 EP1030966B1 (fr) 2003-11-12

Family

ID=7871342

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99938131A Expired - Lifetime EP1030966B1 (fr) 1998-06-18 1999-06-05 Soupape d'injection de carburant pour injection haute pression avec commande amelioree de l'amenee de carburant

Country Status (6)

Country Link
US (1) US6371084B1 (fr)
EP (1) EP1030966B1 (fr)
JP (1) JP2002518628A (fr)
KR (1) KR20010022998A (fr)
DE (2) DE19827267A1 (fr)
WO (1) WO1999066191A1 (fr)

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DE10015740C2 (de) * 2000-03-29 2003-12-18 Siemens Ag Einspritzventil für die Einspritzung von Kraftstoff in eine Verbrennungskraftmaschine
DE10017657A1 (de) * 2000-04-08 2001-10-11 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
DE10024702A1 (de) * 2000-05-18 2001-11-22 Bosch Gmbh Robert Einspritzanordnung für ein Kraftstoff-Speichereinspritzsystem einer Verbrennungsmaschine
JP4356268B2 (ja) * 2000-06-26 2009-11-04 株式会社デンソー 燃料噴射装置
DE10055267B4 (de) * 2000-11-08 2004-07-29 Robert Bosch Gmbh Druckgesteuerter Injektor für Hocheinspritzung mit Schieberdrosseln
DE10122241A1 (de) 2001-05-08 2002-12-05 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
DE10131953A1 (de) 2001-07-02 2003-01-23 Siemens Ag Steuermodul für einen Injektor eines Speichereinspritzsystems
DE10132450B4 (de) 2001-07-04 2010-02-11 Robert Bosch Gmbh Kraftstoffeinspritzventil für Brennkraftmaschinen
DE10133433A1 (de) 2001-07-10 2003-02-20 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
DE10133434A1 (de) 2001-07-10 2003-01-23 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
JP2003113761A (ja) * 2001-08-01 2003-04-18 Denso Corp 燃料噴射弁
DE10146743A1 (de) * 2001-09-22 2003-04-17 Bosch Gmbh Robert Einspritzventil für eine Brennkraftmaschine
DE10152173A1 (de) * 2001-10-23 2003-04-30 Bosch Gmbh Robert Magnetventil zur Steuerung eines Einspritzventils
DE10155677A1 (de) 2001-11-13 2003-05-22 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
DE10207227A1 (de) 2002-02-21 2003-09-04 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
DE10209116A1 (de) 2002-03-01 2003-09-18 Bosch Gmbh Robert Verfahren zur Herstellung eines Kraftstoffeinspritzventils
US7331329B2 (en) * 2002-07-15 2008-02-19 Caterpillar Inc. Fuel injector with directly controlled highly efficient nozzle assembly and fuel system using same
DE10250720A1 (de) * 2002-10-31 2004-05-13 Robert Bosch Gmbh Einspritzventil
AT500889B8 (de) * 2004-08-06 2007-02-15 Bosch Gmbh Robert Vorrichtung zum einspritzen von kraftstoff in den brennraum einer brennkraftmaschine
US7508190B2 (en) * 2004-10-20 2009-03-24 Electro Industries/Gauge Tech. Test pulses for enabling revenue testable panel meters
DE102005059169A1 (de) * 2005-12-12 2007-06-14 Robert Bosch Gmbh Kraftstoffinjektor mit direkt betätigbarem Einspritzventilglied
DE102006034111A1 (de) * 2006-07-24 2008-01-31 Robert Bosch Gmbh Servoventilgesteuerter Injektor zur Einspritzung von Kraftstoff in Zylinderbrennräume von Brennkraftmaschinen; insbesondere Common-Rail-Injektor
DE102007004553A1 (de) * 2007-01-30 2008-07-31 Robert Bosch Gmbh Kugelsitzventil mit verringertem Erosionsverhalten
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DE102007030711A1 (de) 2007-07-02 2009-01-08 Robert Bosch Gmbh Injektor mit nach außen öffnendem Ventilelement
DE102007032741A1 (de) * 2007-07-13 2009-01-15 Robert Bosch Gmbh Kraftstoffeinspritzventil für Brennkraftmaschinen
DE102008042808A1 (de) 2008-10-14 2010-04-15 Robert Bosch Gmbh Kraftstoffeinspritzventil
US8881709B2 (en) 2009-09-02 2014-11-11 Caterpillar Inc. Fluid injector with back end rate shaping capability
DE102012221470A1 (de) 2012-11-23 2014-05-28 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102012223259A1 (de) * 2012-12-14 2014-06-18 Robert Bosch Gmbh Kraftstoffeinspritzventil
DE102012224397A1 (de) 2012-12-27 2014-07-03 Robert Bosch Gmbh Kraftstoffeinspritzventil für Brennkraftmaschinen
DE102013212249A1 (de) 2013-06-26 2014-12-31 Robert Bosch Gmbh Kraftstoffeinspritzventil für Brennkraftmaschinen
DE102013220584A1 (de) 2013-10-11 2015-04-16 Robert Bosch Gmbh Steuerventil
GB201412086D0 (en) * 2014-07-08 2014-08-20 Delphi International Operations Luxembourg S.�.R.L. Fuel injector for an internal combustion engine
DE102014215466A1 (de) 2014-08-05 2016-02-11 Robert Bosch Gmbh Magnetventil
DE102014215749A1 (de) 2014-08-08 2016-02-11 Continental Automotive Gmbh Drosseleinrichtung zum Steuern einer einer Kraftstoff-Einspritzdüse zuzuführenden Kraftstoffmenge sowie Einspritzeinrichtung
DE102015210800A1 (de) * 2015-06-12 2016-12-15 Continental Automotive Gmbh Ventilvorrichtung für ein Kraftstoffeinspritzsystem und Kraftstoffeinspritzsystem
CN113175311B (zh) * 2020-04-08 2022-08-05 中国石油天然气股份有限公司 节流装置及节流芯的更换方法

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Also Published As

Publication number Publication date
JP2002518628A (ja) 2002-06-25
EP1030966B1 (fr) 2003-11-12
US6371084B1 (en) 2002-04-16
DE59907711D1 (de) 2003-12-18
KR20010022998A (ko) 2001-03-26
WO1999066191A1 (fr) 1999-12-23
DE19827267A1 (de) 1999-12-23

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