EP1316719B1 - Injecteur comprenant une soupape électromagnétique pour la commande d'une soupape d'injection - Google Patents

Injecteur comprenant une soupape électromagnétique pour la commande d'une soupape d'injection Download PDF

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Publication number
EP1316719B1
EP1316719B1 EP02022592A EP02022592A EP1316719B1 EP 1316719 B1 EP1316719 B1 EP 1316719B1 EP 02022592 A EP02022592 A EP 02022592A EP 02022592 A EP02022592 A EP 02022592A EP 1316719 B1 EP1316719 B1 EP 1316719B1
Authority
EP
European Patent Office
Prior art keywords
injector
valve
armature
injection
space
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
EP02022592A
Other languages
German (de)
English (en)
Other versions
EP1316719A3 (fr
EP1316719A2 (fr
Inventor
Ruediger Bauer
Rainer Schnatterer
Matthias Zettl
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 EP1316719A2 publication Critical patent/EP1316719A2/fr
Publication of EP1316719A3 publication Critical patent/EP1316719A3/fr
Application granted granted Critical
Publication of EP1316719B1 publication Critical patent/EP1316719B1/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
    • 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
    • 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
    • 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
    • F02M63/0017—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic 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
    • 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
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/0033—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat
    • F02M63/0036—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat with spherical or partly spherical shaped valve member ends
    • 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
    • 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 an injector, in particular for fuel injection, with a solenoid valve for controlling an injection valve according to the preamble of the main claim.
  • a solenoid valve for controlling an injection valve according to the preamble of the main claim.
  • Such solenoid valves are used to control an injection valve of a fuel injector with a nozzle needle whose open and closed positions are controlled by the solenoid valve, so that injection holes for injecting fuel can be opened.
  • the solenoid valve has a movable armature which lifts when energized, the magnetic group of the solenoid valve from a valve seat in the lower armature space.
  • This valve seat is in turn via one or more (throttle) holes in fluid communication with the control pressure chamber of the injection valve.
  • the pressure in the control pressure chamber of the injection valve degrades, wherein fluid (pressure medium) flows through the bores in the direction of the valve seat and from there into the lower armature space.
  • the nozzle needle of the injection valve which is constantly exposed to an acting in the opening direction of high-pressure fuel, set in motion, whereby the injection holes are opened and the injector can inject fuel.
  • a common rail injector (CRI) operates, with a main and a pilot injection can be realized with very short injection times.
  • a solenoid valve is for example from the DE 196 50 865 A1 known.
  • Known generic injectors further have a leading to the lower armature space return bore, are returned by the leakage quantities from different portions of the solenoid valve and injector in the lower armature space.
  • the injector according to the invention according to the main claim has means for reducing occurring in the lower armature space pressure fluctuations. It has been shown that pressure surges in the lower armature space, which have a direct effect on the armature surface through the bore in the armature guide, cause the armature to lift off the valve seat and thus cause a delayed closing of the nozzle needle. By reducing the pressure fluctuations in the lower armature space, therefore, the anchor bounce can be reduced to a minimum and thus a continuous closing of the nozzle needle can be ensured.
  • the strength of the armature bounce depends namely on the return backpressure (pressure of the backflow bore recirculated leakage quantities), which is due to the system in a certain tolerance field from. Due to the inventive reduction of pressure fluctuations in the lower armature space can therefore be compensated by the return bore in the lower armature space propagating pressure oscillations and thus the strength of the anchor bounce can be greatly reduced.
  • the means for reducing pressure fluctuations in the lower armature space may include recesses or internals to be machined by which an increased volume of the return bore and / or the lower armature space is achieved.
  • certain portions affected by the recirculation of the leakage quantities in the solenoid valve and in the injection valve can be made larger in their volume. Such an increase in volume causes a reduction of the pressure and thus a reduction of pressure surges.
  • Another measure for reducing pressure fluctuations in the lower armature space is the installation of a throttle in the return bore before the lower armature space.
  • the invention leads to a course of the armature stroke, which is strongly damped compared to the course in known solenoid valves, so that hardly an anchor bounce is noticeable. Accordingly, the course of the needle lift of the nozzle needle is a continuous, so that the nozzle needle continuously without delay in their Closed position moves. This improves the noise and emission levels of the engine. Furthermore, the injection quantity no longer changes depending on the return backpressure. The injection quantity is thus independent of the return backpressure, which also improves the performance of the engine in addition to its noise and emissions.
  • Figure 1 shows the usual structure of an existing of solenoid valve 1 and injector 2 injector, as used in particular for fuel injection in common rail systems.
  • the one-piece armature 3 is pulled by the energizing of the solenoid valve 1 against the spring force of the armature spring 11 upwards.
  • the armature 3 runs in the armature guide 12 and is located on the valve seat 4 of the injection valve 2 when the solenoid valve 1 is de-energized. In this state, the fluid connection to the control pressure chamber 8 of the injection valve 2 via the A-throttle 6 and the bore 7 is interrupted.
  • FIG. 2 shows the lower part of the injector 2 belonging to the injector, whereby here too only a few parts are designated.
  • the nozzle needle 17 is connected.
  • the lower nozzle needle space is designated 16.
  • the injector described in Figures 1 and 2 has the described disadvantage of the anchor bounce. If the solenoid valve 1 is no longer supplied with current, the armature 3 placed on the valve seat 4 does not immediately come to rest, but bounces, whereby the connection between the A-throttle 6 and the lower armature space 5 is briefly reopened. This has a short-term pressure decrease in the control pressure chamber 8 and thus a delayed closing of the nozzle needle 17 result.
  • the time course of this process is shown in FIG.
  • the needle stroke is 34, the anchor stroke is 32 designated.
  • the armature bouncing leads during closing of the solenoid valve to short opening periods 31, the course of the armature stroke corresponds in this area about that of a damped oscillation.
  • the course of the needle lift of the nozzle needle 17 is consequently not linear, but has delays 33.
  • injection quantities depend on the return backpressure.
  • the relationship is shown in FIG. 3, in which the injection quantity Q (in the unit volume per needle stroke) is plotted against the injection duration ET (in milliseconds) for different return back pressures.
  • the curves 30 show different injection quantities with a variation of the return backpressure around 1600 bar. Fluctuations in the return back pressure affect the strength of the anchor bounce, since these pressure fluctuations on the lower armature space 5 and the holes in the armature guide 12 directly affect the anchor surface.
  • the pressure fluctuations in the lower armature space 5 are now reduced by the fact that the volumes of the sections affected by the return of the leakage quantities are increased by construction measures and appropriate design.
  • the return bore 9 and / or the lower armature space 5 itself is increased in volume.
  • the onset of a throttle in the return bore 9 in front of the lower armature space 5 is suitable for reducing pressure fluctuations in the lower armature space 5.
  • the measures described above can also be used together.
  • FIGS. 5 and 6 show the analog representations from FIGS. 3 and 4, respectively, according to the invention optimized injector.
  • the injection quantity (curve 40) remains unchanged.
  • the course of the needle stroke 43 in FIG. 6 is linear, ie the nozzle needle closes continuously without delay.
  • the course of the needle stroke is designated 44 in FIG.
  • the armature stroke 42 shows the injector according to the invention a substantially reduced anchor bounce 41. Duration and strength of the opening of the armature after elimination of Vermömung the solenoid valve are significantly reduced compared to the course of Figure 4.
  • the injector of the present invention improves the noise, emissions, and performance of the engine by ensuring continuous closure of the nozzle needle and eliminating the dependency of the injection amount on backpressure pressure fluctuations.
  • the defined closing of the nozzle of the injection valve causes smaller stroke / stroke variations of the injection quantity and the distance of successive injections can be shortened compared to conventional injectors.

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)
  • Electromagnetism (AREA)
  • Fuel-Injection Apparatus (AREA)

Claims (2)

  1. Injecteur, notamment pour l'injection de carburant, comportant une électrovanne (1) pour commander un injecteur (2) l'électrovanne (1) ayant un induit (3) mobile qui s'applique contre un siège de soupape (4) dans l'espace inférieur (5) de l'induit, relié lui-même par une liaison fluidique à un ou plusieurs perçages (6, 7) à une chambre de pression de commande (8) de l'injecteur (2), et au moins un perçage de retour est prévu dans l'injecteur pour le retour des quantités de fluide de fin de commande de la chambre de pression de commande (8) dans la chambre d'induit (5) inférieure,
    caractérisé par
    un perçage de retour (9) muni d'un organe d'étranglement pour retourner les quantités de fuite d'au moins un segment de l'injecteur à l'extérieur de la chambre de pression de commande (8) pour réduire les variations de pression dans la chambre d'induit (5) inférieure.
  2. Injecteur selon la revendication 1,
    caractérisé par
    un ou plusieurs segments de l'injecteur concernés par le retour des quantités de fuite, tels que le perçage de retour (9) et la chambre d'induit (5) inférieure, sont agrandis en volume par des cavités usinées ou des inserts.
EP02022592A 2001-11-30 2002-10-09 Injecteur comprenant une soupape électromagnétique pour la commande d'une soupape d'injection Expired - Lifetime EP1316719B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10159003A DE10159003A1 (de) 2001-11-30 2001-11-30 Injektor mit einem Magnetventil zur Steuerung eines Einspritzventils
DE10159003 2001-11-30

Publications (3)

Publication Number Publication Date
EP1316719A2 EP1316719A2 (fr) 2003-06-04
EP1316719A3 EP1316719A3 (fr) 2003-08-06
EP1316719B1 true EP1316719B1 (fr) 2008-02-06

Family

ID=7707669

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02022592A Expired - Lifetime EP1316719B1 (fr) 2001-11-30 2002-10-09 Injecteur comprenant une soupape électromagnétique pour la commande d'une soupape d'injection

Country Status (4)

Country Link
US (1) US6877680B2 (fr)
EP (1) EP1316719B1 (fr)
JP (1) JP3902757B2 (fr)
DE (2) DE10159003A1 (fr)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7207760B2 (en) * 2001-12-06 2007-04-24 Junkers John K Washer and fastener provided with a washer
DE102005004327A1 (de) * 2005-01-31 2006-08-03 Robert Bosch Gmbh Elektrische Trennung in Kraftstoffinjektoren
DE102006027780A1 (de) 2006-06-16 2007-12-20 Robert Bosch Gmbh Kraftstoffinjektor
DE102006040645A1 (de) * 2006-08-30 2008-03-13 Robert Bosch Gmbh Injektor für Brennkraftmaschinen
ATE423901T1 (de) * 2006-10-24 2009-03-15 Fiat Ricerche Magnetdosierventil für ein brennstoffeinspritzventil
DE102007001550A1 (de) * 2007-01-10 2008-07-17 Robert Bosch Gmbh Injektor zum Einspritzen von Kraftstoff
DE112011100504B4 (de) * 2010-02-10 2023-08-03 Tenneco Automotive Operating Company Inc. Injektor mit Drallfluss unter Druck mit reduzierter Fließvariabilität und Rückfluss
US8740113B2 (en) 2010-02-10 2014-06-03 Tenneco Automotive Operating Company, Inc. Pressure swirl flow injector with reduced flow variability and return flow
US9683472B2 (en) 2010-02-10 2017-06-20 Tenneco Automotive Operating Company Inc. Electromagnetically controlled injector having flux bridge and flux break
US8973895B2 (en) 2010-02-10 2015-03-10 Tenneco Automotive Operating Company Inc. Electromagnetically controlled injector having flux bridge and flux break
DE102011083005B4 (de) 2011-09-20 2024-05-08 Man Energy Solutions Se Verfahren zur Spülung eines Ankerraums eines zur Steuerung eines Fluidmassenstroms vorgesehenen Magnetventils und Magnetventil
HUE026321T2 (en) * 2012-01-26 2016-05-30 Delphi Int Operations Luxembourg Sarl Fuel Injector Control Valve
US8978364B2 (en) * 2012-05-07 2015-03-17 Tenneco Automotive Operating Company Inc. Reagent injector
US8910884B2 (en) 2012-05-10 2014-12-16 Tenneco Automotive Operating Company Inc. Coaxial flow injector
DE102013003104A1 (de) * 2013-02-25 2014-08-28 L'orange Gmbh Krafftstoffinjektor
DE102015204037A1 (de) 2015-03-06 2016-09-08 Robert Bosch Gmbh Verfahren zur Steuerung eines Common-Rail-Einspritzsystems
US10704444B2 (en) 2018-08-21 2020-07-07 Tenneco Automotive Operating Company Inc. Injector fluid filter with upper and lower lip seal
CN114458508B (zh) * 2022-03-09 2022-12-13 哈尔滨工程大学 一种基于永磁实现高动态响应的电磁-永磁耦合的高速电磁阀

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JPS61226527A (ja) * 1985-03-30 1986-10-08 Nippon Denso Co Ltd 燃料噴射制御装置
US4911127A (en) * 1989-07-12 1990-03-27 Cummins Engine Company, Inc. Fuel injector for an internal combustion engine
JPH06147050A (ja) * 1992-11-02 1994-05-27 Nippondenso Co Ltd 燃料噴射装置
JP3605810B2 (ja) * 1995-05-01 2004-12-22 株式会社デンソー 燃料噴射装置
DE19650865A1 (de) 1996-12-07 1998-06-10 Bosch Gmbh Robert Magnetventil
DE19708104A1 (de) 1997-02-28 1998-09-03 Bosch Gmbh Robert Magnetventil
US5842452A (en) * 1997-11-25 1998-12-01 Pattanaik; Satish Idle stabilizing variable area inlet for a hydraulically-actuated fuel injection system
DE19910589C2 (de) * 1999-03-10 2002-12-05 Siemens Ag Einspritzventil für eine Brennkraftmaschine
DE10009037A1 (de) * 2000-02-25 2001-09-06 Bosch Gmbh Robert Steuerventil für eine Kraftstoff-Einspritzdüse

Also Published As

Publication number Publication date
JP2003172232A (ja) 2003-06-20
DE10159003A1 (de) 2003-06-18
US20030150930A1 (en) 2003-08-14
US6877680B2 (en) 2005-04-12
EP1316719A3 (fr) 2003-08-06
EP1316719A2 (fr) 2003-06-04
DE50211643D1 (de) 2008-03-20
JP3902757B2 (ja) 2007-04-11

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