EP1030966B1 - 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 Download PDF

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Publication number
EP1030966B1
EP1030966B1 EP99938131A EP99938131A EP1030966B1 EP 1030966 B1 EP1030966 B1 EP 1030966B1 EP 99938131 A EP99938131 A EP 99938131A EP 99938131 A EP99938131 A EP 99938131A EP 1030966 B1 EP1030966 B1 EP 1030966B1
Authority
EP
European Patent Office
Prior art keywords
throttle
fuel
duct
pressure
valve
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
EP99938131A
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German (de)
English (en)
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EP1030966A1 (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
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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

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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
    • 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

  • the invention relates to a fuel injection valve for high-pressure injection of fuel from a high pressure accumulator into a combustion chamber Internal combustion engine according to the preamble of claim 1.
  • the control chamber is relieved, whereby the pressure on the pressure surfaces of the Valve member of the injection valve is sufficient that it is in the open Position, that is the injection position, can be brought during which the injection takes place. Will this now through the solenoid valve Throttle closed again, so there is an increase in pressure in the control room, which has the consequence that the valve member again in the closed position brought.
  • the fuel injector also has one of the Electromagnet of the solenoid valve leading to the discharge line which the fuel cutoff amount at the mentioned throttle to one Relief space can drain.
  • the throttle which is controllable by means of the solenoid valve and which seals the side of the fuel injector to the relief line or opens and connects the control room, has two cylindrical channel sections.
  • the first channel section which represents the actual throttle cross section, is in terms of its diameter long and flows into the cross section second cylindrical section, which has a considerably larger cross section has and the connection of the actual thin long throttle channel section with the control room.
  • the object of the invention is therefore a fuel injection valve to create its throttle between the solenoid valve and the control chamber low manufacturing costs and low flow losses can be produced.
  • Internal combustion engine in particular a diesel engine, has a solenoid valve, by means of which the fuel pressure in a control room via a throttle, which have at least one channel walls Throttle channel section has, relieved, which is the injection position of the Fuel injector corresponds, or is mountable, to what the closed position of the fuel injection valve or the non-injection position.
  • the throttle channel section is substantially aperture-shaped educated.
  • the throttle channel section as a throttle diaphragm is aware of the formation of the flow in the throttle channel cross section Influenced by the actual throttle channel section so is briefly stated that its effect resembles an aperture, at which when flowing through the channel sections upstream of the orifice and the fuel injectors downstream of the orifice from the Flow is essentially not touched on the channel walls. On the one hand, this creates a lower flow resistance, so that can significantly improve the control behavior of the fuel injector. On the other hand, this eliminates the fact that the throttle channel cross-section acts as an aperture is trained, the elaborate surface finishing in the other relatively narrow flow channels. This can reduce manufacturing costs be reduced. It also affects the impact of manufacturing accuracy reduced to the flow behavior in such a throttle, because the flow through the immediate throttle area essentially regardless of the surface design of the other duct walls Throttle is.
  • the throttle channel section has such an l / d ratio, that cavitation occurs intentionally. Also through a special geometric education, in particular a short length, is according to this embodiment achieved that the flow when flowing through the actual Throttle channel section essentially not on the channel walls creates, whereby the flow losses are reduced.
  • the throttle channel section has an l / d ratio in the range from 1.0 to 1.5.
  • l / d ratios in the range from 1.0 to 1.5.
  • the length of the throttle channel section is thus with regard to its diameter significantly reduced, resulting in greatly reduced l / d ratios be achieved.
  • the throttle passage section takes the form of a throttle orifice.
  • a rounded towards the control room Area which is in particular HE-rounded.
  • the beam constriction reduces what furthermore the flow losses when flowing through the actual throttle cross-section or the throttle diaphragm is reduced.
  • the throttle is preferably provided with a first throttle channel, which means a closing element of the solenoid valve is closable, and a second Provide throttle channel, which opens into the control room, the orifice-shaped throttle channel section or the throttle orifice between the with the first throttle channel and the second throttle channel axial alignment is arranged to each other.
  • a first throttle channel which means a closing element of the solenoid valve is closable
  • a second Provide throttle channel which opens into the control room, the orifice-shaped throttle channel section or the throttle orifice between the with the first throttle channel and the second throttle channel axial alignment is arranged to each other.
  • the throttle channels are designed so that the flow losses are relatively low are held, and is the diaphragm-shaped throttle channel section between the two throttle channels so short that it has the shape of a throttle orifice receives.
  • Fig. 1 is a longitudinal section through a fuel injection valve for high pressure injection of fuel with an integrated solenoid valve 2 shown.
  • the valve size 17 of the fuel injection valve 1 is one Nozzle needle 11 with a conical sealing surface known per se, which in Closing state comes to rest on a conical valve seat. Of Injection bores go out of this valve seat, which are the actual nozzle 13 in the nozzle body 12.
  • the nozzle needle 11 is replaced by a Compression spring 16 acted on the valve seat in the closing direction.
  • the Nozzle needle 11 also has a pressure shoulder 15, in its Area in the nozzle body 12, a pressure chamber 14 is provided, which with a high-pressure feed line 26 is connected via which of a high-pressure connection 18 in the form of a pressure nozzle with fuel High pressure, preferably with a pressure of 120 MPa in the pressure chamber 14 is supplied. If the corresponding high pressure in the pressure chamber 14 is applied, it acts on the pressure shoulder 15 and thus generates an axial Direction of the nozzle needle 11 acting force, which with appropriate Control of the solenoid valve 2 is sufficient to raise the nozzle needle 11 and to release the nozzle bores of the nozzle 13 in the nozzle body 12. This causes fuel to enter the combustion chamber of the internal combustion engine injected.
  • control room 3 points an inlet with a high-pressure throttle from the high-pressure connection 18 19 and a sequence to a relief line 24 with the invention Throttle 4, which by a valve member 27 of the solenoid valve 2 is controlled.
  • the solenoid valve 2 has one in the closing direction acting spring 20 and a magnetic coil 22, which when excited Tighten the valve member 27, whereby the throttle 4 opens becomes.
  • an E-connection 23 is provided for the power supply of the solenoid valve 2.
  • the throttle 4 has a first throttle channel 8, which by means of a spherical closing element 9 is closable, which can be actuated by the solenoid valve 2 is a throttle channel section 5, which is designed in the form of an aperture, and a second throttle channel 10.
  • the transition of the throttle channel section 5 is designed as a rounded transition region 6 around a beam constriction counteract.
  • the second throttle duct 10 opens into the Control room 3, in which the valve lifter 25 is located, which by corresponding pressure in the control room 3 can be acted upon with fuel pressure is.
  • the solenoid valve-controlled throttle 4 is within the Valve housing 17 arranged.
  • the throttle channel section 5 is such a short length or a has such an l / d ratio that it acts as a throttle orifice, and that the transition area from this throttle channel section 5 into the second Throttle channel 10 is formed as a rounded transition region 6, and in that the geometric relationships of the individual throttle channels or throttle channel sections and the radii of the rounded transition area 6 can be coordinated, the formation of the flow through the throttle along all channel sections or throttle channels in Optimized with a view to optimal control of the fuel injection valve 1 become.

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.

Claims (3)

  1. Injecteur de carburant (1) pour injection haute pression de carburant provenant d'un accumulateur haute pression disposé dans une chambre de combustion d'un moteur à combustion interne, plus particulièrement d'un moteur diesel, qui présente une électrovanne (2) servant soit à emmagasiner la pression du carburant dans une chambre de contrôle (3) par un étranglement (4) présentant au moins un tronçon du goulot d'étranglement défini par ses parois de goulot (6) (position fermée), soit à la relâcher (position d'injection) et pour laquelle le tronçon du goulot d'étranglement (5) est pour l'essentiel en forme de diaphragme,
    caractérisé en ce que
    le tronçon du goulot d'étranglement présente un rapport l/d compris entre 1,0 et 1,5 tel qu'il se forme de la cavitation, et à une formation géométrique notamment la longueur 1, telle que le courant d'écoulement ne provoque pas de dépôt, du moins en grande partie, sur les parois du goulot (6) lors du passage de carburant dans le tronçon du goulot d'étranglement (5).
  2. Injecteur de carburant (1) selon la revendication 1,
    caractérisé en ce que
    le tronçon du goulot d'étranglement (5) est arrondi dans une zone de transition (7) comportant un élargissement transversal en direction de la chambre de contrôle (3), notamment en forme de rond HE.
  3. Injecteur de carburant (1) selon l'une des revendications 1 ou 2,
    caractérisé en ce que
    l'étranglement (4) présente un premier goulot d'étranglement (8) fermant grâce à un élément de fermeture (9) de l'électrovanne (2) et un second goulot d'étranglement (10) débouchant dans la chambre de contrôle (3), et le tronçon du goulot d'étranglement (5) en forme de diaphragme est disposé, pour l'essentiel dans l'axe, entre le premier goulot d'étranglement (8) et le second goulot d'étranglement (10).
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
DE19827267A DE19827267A1 (de) 1998-06-18 1998-06-18 Kraftstoff-Einspritzventil für Hochdruck-Einspritzung mit verbesserter Steuerung der Kraftstoffzufuhr
DE19827267 1998-06-18
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 EP1030966A1 (fr) 2000-08-30
EP1030966B1 true 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
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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
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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
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DE102014215466A1 (de) 2014-08-05 2016-02-11 Robert Bosch Gmbh Magnetventil
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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
WO1999066191A1 (fr) 1999-12-23
DE19827267A1 (de) 1999-12-23
KR20010022998A (ko) 2001-03-26
EP1030966A1 (fr) 2000-08-30
US6371084B1 (en) 2002-04-16
DE59907711D1 (de) 2003-12-18

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