EP1045978B1 - Soupape d'injection de carburant pour moteurs a combustion interne - Google Patents

Soupape d'injection de carburant pour moteurs a combustion interne Download PDF

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Publication number
EP1045978B1
EP1045978B1 EP99938166A EP99938166A EP1045978B1 EP 1045978 B1 EP1045978 B1 EP 1045978B1 EP 99938166 A EP99938166 A EP 99938166A EP 99938166 A EP99938166 A EP 99938166A EP 1045978 B1 EP1045978 B1 EP 1045978B1
Authority
EP
European Patent Office
Prior art keywords
valve
guide surface
bore
valve element
valve member
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
EP99938166A
Other languages
German (de)
English (en)
Other versions
EP1045978A1 (fr
Inventor
Karl Hofmann
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 EP1045978A1 publication Critical patent/EP1045978A1/fr
Application granted granted Critical
Publication of EP1045978B1 publication Critical patent/EP1045978B1/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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
    • F02M61/12—Other injectors with elongated valve bodies, i.e. of needle-valve type characterised by the provision of guiding or centring means for valve bodies
    • 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
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-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
    • 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

Definitions

  • the invention relates to a fuel injection valve for Internal combustion engines according to the preamble of claim 1 out.
  • a fuel injection valve for Internal combustion engines is a piston-shaped valve member axially displaceable in one Drilled bore of a valve body, the combustion chamber end of the valve member a Has valve sealing surface with which it is used to control the Passage of fuel into the combustion chamber Internal combustion engine opening with an injection Fixed end of the bore provided on the combustion chamber side Valve seat interacts.
  • the opening stroke movement of the Valve member takes place against a restoring force, usually the force of a valve spring, by an am High valve member attacking in the opening direction Injection pressure of the inflowing fuel.
  • valve member has a ring shoulder formed pressure shoulder, which in one by one Cross-sectional expansion of the bore formed pressure chamber protrudes.
  • the valve member is with his Shaft part facing away from the combustion chamber and enlarged in cross section sealingly slidable in one, a guide section forming part of the bore in the valve body. This The guide section of the valve member forms one Guide surface at the end of the Valve member, due to its very close guidance in the Bore is exposed to high wear.
  • the fuel injector according to the invention for Internal combustion engines with the characteristic features of the Claim 1 has the advantage that a Tilting of the valve member and thus one-sided Wear on the guide surfaces can be safely avoided can.
  • This is advantageously by the Providing a hydraulic wedge between the valve member and the guide hole in the valve body, which is over the essential part of the guide surface between Valve member and bore extends and so the valve member hydraulically centered in the bore.
  • these Recesses in the guide surface of the valve member preferably evenly distributed over their circumference arranged so that a uniform on the valve member Pressure equalization is built up, the local pressure peaks between valve member and guide bore and thus safely avoids unilateral lateral force transmission.
  • recesses can be in the guide surface of the Valve member as a punctual Recesses or also be designed as oblique grooves, alternatively, other recess shapes are also possible here are.
  • the recesses are only in a micrometer range of approximately 1mm maximum.
  • Lubrication pockets When using a variety of individual Recesses, which form so-called lubrication pockets, they preferably have a diameter between 0.2 and 0.5mm on and are about 0.02 to 0.05mm deep in that Valve element incorporated. Making this Lubrication pockets are preferably made using a Laser baking or rolling into the Shell surface of the valve member.
  • the hydraulic pressure compensation recesses are included the described embodiments in the peripheral surface of the valve member incorporated, but it is alternative also possible, these pressure compensation recesses in the wall the guide bore in the area of the guide surface of the To provide valve member and so the same hydraulic Centering effect. It should also in this Fall the pressure compensation recesses in the range of Micrometer sizes can be designed to tear off the Lubricating film between the valve member and the bore avoid.
  • Fuel injection valves for internal combustion engines are in the drawing and are shown below explained.
  • FIGS. 2 and 2A are enlarged sections from FIG Figure 1 in the region of the guide surface of the valve member
  • Figure 3 shows a second example in a simplified representation of the valve member in the area of Guide surface, in which the recesses as lubrication pocket recesses are formed
  • Figure 4 is a third Example according to the representation of Figure 3, at which the recesses in the guide surface of the valve member are designed as oblique grooves.
  • FIG. 1 illustrated first example of the Fuel injector for Internal combustion engines has a valve body 1, in the one, starting from its end surface 3 remote from the combustion chamber axial blind hole 5 is introduced.
  • this Blind hole 5 is a piston-shaped valve member 7 axially slidably guided, the lower, combustion chamber end is conical, the conical surface a conical valve sealing surface 9 forms.
  • This valve sealing surface 9 acts with a conical, the blind hole 5 Combustion chamber limiting valve seat 11 together, from the downstream of the sealing line between valve sealing surface 9 and Valve seat 11 discharges an injection opening 13, which in the Combustion chamber of the internal combustion engine to be supplied opens.
  • valve member 7 has a through Diameter reduction of the valve member 7 formed in Pressure shoulder 15 pointing towards valve sealing surface 9, the one forming a pressure chamber 17 Cross-sectional expansion of the bore 5 in the valve body 1 protrudes.
  • this pressure chamber 17 opens at an angle from the End face 3 outgoing high pressure channel 19, which is not in shown in more detail via feed lines to a Fuel injection pump is connected to the Pressure chamber 17 alternately with high pressure Filled with fuel.
  • the pressure chamber 17 settles downstream via a, between valve member 7 and bore wall 5 formed annular gap 21 up to the valve seat surface 11, so that the high fuel pressure at the sealing cross section between Valve sealing surface 9 and valve seat 11 is present.
  • valve member 7 With its valve seat facing away from the pressure shoulder 15 the adjacent valve member area forms the valve member 7 a guide surface 23, with which the valve member 7 with a tight fit slidably on the wall of the Blind hole 5 is guided.
  • Guide surface 23 As in Figures 2 and 2A shown enlarged, transversely in the first example annular grooves 25 extending to the axis of the valve member 7 incorporated.
  • These micro-ring grooves cause by of a hydraulic pressure compensation pad a safe one Avoid tilting or tilting the Valve member 7 within the blind hole 5 and prevent thus one-sided wear on the guide surfaces.
  • the annular grooves 25 are in the wall of the guide surface 23 so small that tearing off Lubricant film between the guide surface 23 and the wall the hole 5 can be safely avoided.
  • the ring grooves 25 point in the embodiment in one Valve member diameter in the area of the guide surface 23 of 4mm, a width b of approximately 0.16mm and a depth t of approximately 0.03mm on.
  • the distances a between the individual ring grooves 25 vary from 0.6mm at the end remote from the valve seat and 0.8 mm at the end of the guide surface 23 facing the valve seat.
  • the annular grooves 25 in the first Embodiment a radius-shaped cross-sectional area on, with the radius of the annular grooves 25 in Example is 0.1mm.
  • the pressure compensation recesses in the guide surface 23 of the valve member 7 are designed as oblique grooves 29, each of which encompass approximately 180 ° of the valve member circumference and are arranged offset from one another.
  • these oblique grooves 29 have a larger cross section at one end than at the second end facing away from them, or alternatively are designed as spiral grooves in a manner not shown in detail.
  • the oblique grooves 29 widen in the direction of the upper end facing away from the combustion chamber from approximately 0.15 mm at the lower end to approximately 0.3 to 0.5 mm at the upper end.
  • the fuel injector according to the invention for Internal combustion engines work in the following way.
  • valve member 7 is by means of a valve spring, not shown, with its Valve sealing surface 9 seals against valve seat 11 held so that the passage of fuel from the pressure chamber 17th is closed to the injection opening 13. Should one Fuel injection will take place at the injection valve high pressure fuel from the not shown fuel injection pump via the high pressure channel 19 fed into the pressure chamber 17, where he on the Pressure shoulder 15 in the opening direction on valve member 7 attacks. After reaching the necessary Injection opening pressure exceeds this at the Pressure shoulder 15 attacking hydraulic opening force Restoring force of the valve spring and the valve member 7 is against the closing force of the valve spring by his Valve seat 11 lifted off.

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

Claims (7)

  1. Soupape d'injection de carburant pour moteurs à combustion interne comprenant un organe de soupape (7) mobile, axialement dirigé dans un alésage (5) d'un corps de soupape (1), l'extrémité de l'organe de soupape du côté de la chambre de combustion présentant une surface étanche (9) qui coopère avec un siège de soupape (11) prévu sur l'extrémité de l'alésage (5) du côté de la chambre de combustion pour commander le passage du carburant dans au moins un orifice d'injection (13) débouchant dans la chambre de combustion et avec une surface de guidage (23) dirigeant l'organe de soupape (7) coulissant dans l'alésage (5) sur l'extrémité de l'organe de soupape du côté de la chambre de combustion (7), dans laquelle, dans la surface de guidage (23) de l'organe de soupape (7), on prévoit une quantité d'entailles (rainures) qui centrent de manière hydraulique l'organe de soupape (7) dans l'alésage (5),
    caractérisée en ce que
    les entailles (rainures) dans la surface de guidage (23) de l'organe de soupape (7) sont configurées comme une quantité de poches lubrifiantes (27) réparties sur le pourtour de la surface de guidage (23).
  2. Soupape d'injection de carburant selon la revendication 1,
    caractérisée en ce que
    les poches lubrifiantes (27) sont configurées comme des cavités dans la surface de guidage (23) elles ont de préférence un diamètre compris entre 0,2 et 0,5 mm et sont façonnées avec une profondeur approximative comprise entre 0,02 et 0,05 mm dans l'organe de soupape(7).
  3. Soupape d'injection de carburant selon la revendication 1,
    caractérisée en ce que
    les poches lubrifiantes (27) sont fabriquées au moyen d'un procédé laser.
  4. Soupape d'injection de carburant selon la revendication 1,
    caractérisée en ce que
    les poches lubrifiantes (27) sont serties dans la surface de revêtement de l'organe de soupape (7).
  5. Soupape d'injection de carburant pour moteurs à combustion interne comprenant un organe de soupape mobile axialement dirigé dans un alésage (5) d'un corps de soupape (1), l'extrémité du côté de la chambre de combustion de l'organe de soupape présentant une surface étanche (9) qui coopère avec un siège de soupape (11) prévu sur l'extrémité de l'alésage (5) du côté de la chambre de combustion pour commander le passage du carburant dans au moins un orifice d'injection (13) débouchant dans la chambre de combustion et avec une surface de guidage (23) dirigeant l'organe de soupape (7) coulissant dans l'alésage (5) sur l'extrémité de l'organe de soupape (7) du côté de la chambre de combustion
    surface de guidage (23) de l'organe de soupape (7) dans laquelle on prévoit une quantité d'entailles (rainures) qui centrent de manière hydraulique l'organe de soupape (7) dans l'alésage (5),
    caractérisée en ce que
    les entailles dans la surface de guidage (23) de l'organe de soupape (7) sont configurées comme des rainures inclinées (29) qui comprennent d'environ 180° sur le pourtour de l'organe de soupape.
  6. Soupape d'injection de carburant selon la revendication 5,
    caractérisée en ce que
    les rainures inclinées (29) sont configurées en courbes spiralées.
  7. Soupape d'injection de carburant selon la revendication 5,
    caractérisée en ce que
    les rainures inclinées (29) s'élargissent en direction de l'extrémité opposée au siège de soupape.
EP99938166A 1998-09-22 1999-06-11 Soupape d'injection de carburant pour moteurs a combustion interne Expired - Lifetime EP1045978B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19843344 1998-09-22
DE19843344A DE19843344A1 (de) 1998-09-22 1998-09-22 Kraftstoffeinspritzventil für Brennkraftmaschinen
PCT/DE1999/001705 WO2000017512A1 (fr) 1998-09-22 1999-06-11 Soupape d'injection de carburant pour moteurs a combustion interne

Publications (2)

Publication Number Publication Date
EP1045978A1 EP1045978A1 (fr) 2000-10-25
EP1045978B1 true EP1045978B1 (fr) 2004-04-07

Family

ID=7881774

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99938166A Expired - Lifetime EP1045978B1 (fr) 1998-09-22 1999-06-11 Soupape d'injection de carburant pour moteurs a combustion interne

Country Status (5)

Country Link
US (1) US6283389B1 (fr)
EP (1) EP1045978B1 (fr)
JP (1) JP2002525488A (fr)
DE (2) DE19843344A1 (fr)
WO (1) WO2000017512A1 (fr)

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DE10024854C2 (de) * 2000-05-19 2002-11-28 Siemens Ag Ventilnadel und Ventilsteuerkolben von Injektoren
DE10102234A1 (de) * 2001-01-19 2002-07-25 Bosch Gmbh Robert Vorrichtung zur Kraftstoff-Hochdruckversorgung einer Brennkraftmaschine
DE10122167A1 (de) 2001-05-08 2002-11-14 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
DE10133166A1 (de) * 2001-07-07 2003-01-16 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
JP4007202B2 (ja) * 2003-01-23 2007-11-14 株式会社デンソー 軸部材の摺動構造およびインジェクタ
DE10305187A1 (de) * 2003-02-08 2004-08-19 Robert Bosch Gmbh Kraftstoff-Einspritzvorrichtung, insbesondere für Brennkraftmaschinen mit Kraftstoff-Direkteinspritzung
EP1469187B1 (fr) * 2003-04-16 2006-10-04 Siemens Aktiengesellschaft Ensemble de soupape a pointeau et procédé pour le réaliser
JP4066959B2 (ja) * 2004-01-27 2008-03-26 株式会社デンソー 燃料噴射装置
JP4079144B2 (ja) * 2004-12-20 2008-04-23 株式会社豊田中央研究所 燃料噴射弁
EP1783360B1 (fr) * 2005-11-02 2008-03-26 Delphi Technologies, Inc. Filtre interne pour un injecteur au carburant
DE102005061781A1 (de) * 2005-12-23 2007-06-28 Schaeffler Kg Injektor eines Kraftstoff-Einspritzsystems
JP2008057458A (ja) * 2006-08-31 2008-03-13 Mitsubishi Heavy Ind Ltd 燃料噴射弁
US8632053B2 (en) 2010-05-11 2014-01-21 Fisher Controls International, Llc Movable valve apparatus having conditioned lubricating surfaces
DE102010026324A1 (de) * 2010-07-07 2012-01-12 Andreas Stihl Ag & Co. Kg Schneidgarnitur einer Kettensäge und Sägekette
DE102010063246B4 (de) * 2010-12-16 2015-12-03 Continental Automotive Gmbh Antriebsvorrichtung für ein Einspritzventil und Einspritzventil
DE102011004644A1 (de) * 2011-02-24 2012-08-30 Robert Bosch Gmbh Ventil für eine Komponente eines Kraftstoffeinspritzsystems sowie Kraftstoffinjektor
EP2824311A1 (fr) * 2013-07-10 2015-01-14 EFI Hightech AG Agencement d'un élément de piston et injecteur doté d'un agencement d'élément de piston
CN104121186A (zh) * 2014-06-24 2014-10-29 济南大学 液压柱塞泵自润滑装置
KR101638815B1 (ko) * 2016-01-07 2016-07-25 한빛정공(주) 4 행정용 인젝션 밸브

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Also Published As

Publication number Publication date
JP2002525488A (ja) 2002-08-13
DE59909113D1 (de) 2004-05-13
US6283389B1 (en) 2001-09-04
DE19843344A1 (de) 2000-03-23
WO2000017512A1 (fr) 2000-03-30
EP1045978A1 (fr) 2000-10-25

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