EP2816219B1 - Soupape de contrôle pour un injecteur de carburant - Google Patents

Soupape de contrôle pour un injecteur de carburant Download PDF

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Publication number
EP2816219B1
EP2816219B1 EP14163848.6A EP14163848A EP2816219B1 EP 2816219 B1 EP2816219 B1 EP 2816219B1 EP 14163848 A EP14163848 A EP 14163848A EP 2816219 B1 EP2816219 B1 EP 2816219B1
Authority
EP
European Patent Office
Prior art keywords
valve
guide
valve sleeve
control valve
undercut
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.)
Not-in-force
Application number
EP14163848.6A
Other languages
German (de)
English (en)
Other versions
EP2816219A1 (fr
Inventor
Christian Kramer
Markus Raithel
Stephan Stone
Roland Muenzel
Matthias Horn
Stephan Amelang
Andreas Rettich
Christian Faltin
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 EP2816219A1 publication Critical patent/EP2816219A1/fr
Application granted granted Critical
Publication of EP2816219B1 publication Critical patent/EP2816219B1/fr
Not-in-force 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
    • 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
    • F02M63/004—Sliding valves, e.g. spool valves, i.e. whereby the closing member has a sliding movement along a seat for opening and closing
    • F02M63/0042—Sliding valves, e.g. spool valves, i.e. whereby the closing member has a sliding movement along a seat for opening and closing combined with valve seats of the lift valve type
    • 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
    • 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
    • F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059
    • F02M63/0071—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059 characterised by guiding or centering means in valves including the absence of any guiding means, e.g. "flying arrangements"
    • 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
    • F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059
    • F02M63/0073—Pressure balanced valves
    • 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
    • F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059
    • F02M63/0078—Valve member details, e.g. special shape, hollow or fuel passages in the valve member
    • F02M63/008—Hollow valve members, e.g. members internally guided
    • 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
    • F02M2200/02—Fuel-injection apparatus having means for reducing wear
    • 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

Definitions

  • the invention relates to a pressure-balanced control valve for a fuel injector of an internal combustion engine having the features of the preamble of claim 1.
  • a pressure compensated control valve for a fuel injector is off DE 10 2007 047 425 A1 known, in which a valve sleeve is guided axially movable on a guide pin.
  • the valve sleeve switchably limits a valve chamber to the outside, which is connected to a control chamber of a nozzle needle of the fuel injector via a drain hole.
  • a closing spring By a closing spring, the valve sleeve is pressed against a valve seat formed on a valve seat and thereby closes the valve chamber with respect to a low-pressure chamber.
  • a solenoid is actuated, the valve sleeve lifts off the valve seat due to electromagnetic forces.
  • About valve chamber and drain hole so the control chamber is connected to the low-pressure chamber, the pressure in the control chamber drops and the nozzle needle lifts from the nozzle needle seat and are injection openings in the combustion chamber of an internal combustion engine free.
  • a pressure balanced control valve for a fuel injector known in which a valve sleeve is guided axially movably on a guide pin.
  • the valve sleeve switchably limits a valve chamber to the outside, which is connected via bores in the guide pin with a control chamber of a nozzle needle of the fuel injector.
  • the valve sleeve has an annular groove, wherein the annular groove adjoins a sealing surface which cooperates with a valve seat of the guide pin.
  • the fuel injection valve according to the invention with the features of claim 1 minimizes wear between the guide pin and the valve sleeve. This is achieved in that in the guide region in which a guide surface of the valve sleeve and a guide surface of the guide pin cooperate, an undercut is formed in the guide surface of the valve sleeve.
  • the resulting leadership of the valve sleeve is divided into two areas along the longitudinal axis of the guide pin, and at the two ends of the guide portion each have a defined length is maintained at which contact between the guide pin and the valve sleeve is possible. A deflection of the guide pin can then have no punctual contact of the guide pin with the valve sleeve in the middle of the guide area result.
  • the defined lengths remain at the ends of the guide portion over the entire Stroke of the valve sleeve constant. If it then comes to a tilting or a deflection of the guide pin, the tribology is in the contact guide pin to valve sleeve more robust. Furthermore, due to the formation of the undercut on the valve sleeve, the two leakage paths at the two ends of the guide region remain constant.
  • the undercut is formed axially at least approximately in the middle of the guide region. This results in equally large resulting guides of the valve sleeve at the two ends of the guide area. The avoidance of the punctual contact of the guide pin with the valve sleeve in deflection of the guide pin is optimized.
  • the undercut is formed radially encircling. A rotation of guide pin or valve sleeve about its longitudinal axis has it no negative effects on wear anymore; a rotation is not required.
  • the undercut is viewed in longitudinal section as a concave arc. The contour of the concave arc can thus be adapted to a potential deflection of the guide pin on its bulging side.
  • a uniform lubricating film structure would be the result and thus minimized solid contact and minimized wear in the two guide surfaces.
  • a preferred value for the height of the concave arc is 1 ⁇ m to 10 ⁇ m.
  • Fig. 1 schematically shows the essential parts of a control valve 30 according to the invention in longitudinal section, which is arranged in the injector body 50 of a fuel injector 100 .
  • the control valve 30 has a valve sleeve 1, a guide pin 2, a valve piece 3 and a closing spring 5 .
  • the closing spring 5 presses the valve sleeve 1 against a formed on the valve member 3 valve seat 4.
  • a force can be applied to the valve sleeve 1, by lifting the valve sleeve 1 from the valve seat 4, and so a gap frees .
  • a force can be applied to the valve sleeve 1, by lifting the valve sleeve 1 from the valve seat 4, and so a gap frees .
  • fuel from a control chamber 7, which is bounded by the valve piece 3 on the side facing away from the valve sleeve 1 , via a valve disposed in the 3 piece bore 8 and flow through the released gap in the low-pressure chamber 9 , which surrounds the valve sleeve 1 and connected to the not shown return system of the fuel injector 100 .
  • the opening movement of a not shown nozzle needle of the fuel injector 100 can be controlled.
  • the valve sleeve 1 is guided over a guide region 15 on the guide pin 2 .
  • the guide portion 15 has on the one hand, the valve sleeve 1, a guide surface of the valve sleeve 11 and the other part of the guide pins 2, a guide surface of the guide pin 12.
  • the guide surface of the valve sleeve 11, an undercut 20 is formed so that upon bending of the guide pin 2, a contact between the valve sleeve 1 and guide pin 2 in the middle of the guide portion 15 is avoided.
  • valve sleeve 1 is additionally guided in the appropriately designed valve piece 3 .
  • Fig. 2a shows an advantageous embodiment of the formed in the valve sleeve 1 undercut 20 as a concave arc with the height h.
  • the undercut 20 is formed over most of the guide portion 15 .
  • the processing of the undercut 20 is incorporated into an existing grinding process for the guide surface of the valve sleeve 11 .
  • the height h of the concave arc is ideally 1 .mu.m to 10 .mu.m.

Landscapes

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

Claims (4)

  1. Soupape de commande 30 pour un injecteur de carburant 100 qui est disposé dans un corps d'injecteur 50, comprenant une douille de soupape 1 disposée dans la soupape de commande 30, qui est guidée de manière déplaçable axialement sur un boulon de guidage 2 à l'intérieur d'une région de guidage 15 dans laquelle coopèrent une surface de guidage de la douille de soupape 11 et une surface de guidage du boulon de guidage 12, la surface de guidage de la douille de soupape 11 présentant une dépouille 20, caractérisée en ce que la dépouille 20 est réalisée au moins approximativement au milieu de la région de guidage 15, des guidages résultants, de taille identique, de la douille de soupape étant réalisés au niveau des deux extrémités de la région de guidage, la dépouille 20 étant réalisée en coupe longitudinale sous forme d'arc concave.
  2. Soupape de commande 30 selon la revendication 1, caractérisée en ce que la dépouille 20 est radialement périphérique.
  3. Soupape de commande 30 selon la revendication 1 ou 2, caractérisée en ce que l'arc concave s'étend sur la majeure partie de la région de guidage 15.
  4. Soupape de commande 30 selon l'une quelconque des revendications 1 à 3, caractérisée en ce que l'arc concave présente une hauteur h de 1 µm à 10 µm.
EP14163848.6A 2013-06-21 2014-04-08 Soupape de contrôle pour un injecteur de carburant Not-in-force EP2816219B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE201310211855 DE102013211855A1 (de) 2013-06-21 2013-06-21 Steuerventil für einen Kraftstoffinjektor

Publications (2)

Publication Number Publication Date
EP2816219A1 EP2816219A1 (fr) 2014-12-24
EP2816219B1 true EP2816219B1 (fr) 2018-10-10

Family

ID=50440556

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14163848.6A Not-in-force EP2816219B1 (fr) 2013-06-21 2014-04-08 Soupape de contrôle pour un injecteur de carburant

Country Status (2)

Country Link
EP (1) EP2816219B1 (fr)
DE (1) DE102013211855A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015203515A1 (de) * 2015-02-27 2016-09-01 Robert Bosch Gmbh Teildruckausgeglichenes Druckregelventil für einen Hochdruckspeicher
DE102015204515A1 (de) * 2015-03-12 2016-09-15 Robert Bosch Gmbh Steuerventil für einen Kraftstoffinjektor
DE102015211043A1 (de) * 2015-06-16 2016-12-22 Robert Bosch Gmbh Kraftstoffeinspritzventil für Brennkraftmaschinen
DE102015223168A1 (de) * 2015-11-24 2017-05-24 Robert Bosch Gmbh Kraftstoffinjektor

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006021741A1 (de) * 2006-05-10 2007-11-15 Robert Bosch Gmbh Kraftstoffinjektor mit druckausgeglichenem Steuerventil
DE102006055548A1 (de) 2006-11-24 2008-05-29 Robert Bosch Gmbh Kraftstoffinjektor
DE102007013245A1 (de) * 2007-03-20 2008-09-25 Robert Bosch Gmbh Druckausgeglichenes Schaltventil
DE102007040248A1 (de) * 2007-08-27 2009-03-05 Robert Bosch Gmbh Steuerventil für einen Kraftstoffinjektor
DE102007047425A1 (de) 2007-10-04 2009-04-09 Robert Bosch Gmbh Steuerventil für einen Kraftstoffinjektor
DE102009029009A1 (de) * 2009-08-31 2011-03-03 Robert Bosch Gmbh Injektor zum Einspritzen von Kraftstoff
DE102011004186A1 (de) 2011-02-16 2012-08-16 Robert Bosch Gmbh Kraftstoffeinspritzkomponente

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
DE102013211855A1 (de) 2014-12-24
EP2816219A1 (fr) 2014-12-24

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