EP1044327B1 - 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
EP1044327B1
EP1044327B1 EP99938165A EP99938165A EP1044327B1 EP 1044327 B1 EP1044327 B1 EP 1044327B1 EP 99938165 A EP99938165 A EP 99938165A EP 99938165 A EP99938165 A EP 99938165A EP 1044327 B1 EP1044327 B1 EP 1044327B1
Authority
EP
European Patent Office
Prior art keywords
pressure
valve
opening
pressure duct
valve body
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
EP99938165A
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German (de)
English (en)
Other versions
EP1044327A1 (fr
Inventor
Bernhard Bonse
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 EP1044327A1 publication Critical patent/EP1044327A1/fr
Application granted granted Critical
Publication of EP1044327B1 publication Critical patent/EP1044327B1/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
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • 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
    • F02M55/008—Arrangement of fuel passages inside of 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
    • 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
    • F02M61/162—Means to impart a whirling motion to fuel upstream or near discharging orifices

Definitions

  • the invention is based on a fuel injection valve for Internal combustion engine according to the preamble of claim 1 out.
  • Al known fuel injection valve is a piston-shaped Valve member axially displaceable against a closing force guided in a guide bore of a valve body, the with its one end into a combustion chamber of the to be supplied Internal combustion engine protrudes.
  • the valve member its combustion chamber side face a conical Valve sealing surface on which it is used to control a fürflußquer4.000es to an injection opening in the Combustion chamber of the internal combustion engine to be supplied with a fixed conical valve seat surface at the closed end the guide bore in the valve body cooperates.
  • the Injection opening is as one of the valve seat surface outgoing injection hole formed.
  • the valve member has on its shaft on a pressure shoulder, at the one Pending fuel high pressure in the opening direction of Valve member against a closing force of a valve spring attacks.
  • the pressure shoulder of the valve member protrudes a pressure chamber, which by a cross - sectional widening of Guide bore is formed.
  • This pressure room opens Pressure channel, which from a combustion chamber remote axial End face of the valve body goes out and due to its radially outwardly arranged entrance obliquely to the axis of the Valve body runs.
  • This pressure channel is over corresponding supply lines to a High-pressure fuel pump connected, so that the High-pressure fuel via the pressure channel in the pressure chamber is initiated.
  • US 3,511,442 is a generic fuel injection valve known in which the pressure chamber for improved uptake of Inlet opening of the pressure channel formed radially on one side is.
  • the known fuel injection valves have this the disadvantage that already by a slight eccentric position of the valve member some Injections during the opening stroke of the valve member especially with a small valve member opening stroke, largely remain closed while the inflow to the rest Injection openings largely unthrottled occurs. This has an uneven fuel injection at the Fuel injection valve results, in particular reinforced forms at so-called hole nozzles. It will the effect described in the known Fuel injection valves supported by the Outlet opening of the pressure channel in the pressure chamber in the middle the valve member is aligned so that dynamically Transverse force acts on the valve member, the valve member one-sided pushes and so their necessary centric position for a uniform Injection jet formation impaired.
  • the inventive position of the pressure channel is at a so-called seat hole nozzle described in the embodiment, but it can also be done on all others Fuel injection valve types, for example blind-hole nozzles, Dowel nozzles and so on, used where one Tilting or tilting of the valve member the Fuel injection at the injection ports impaired. Since the described impairment has a particularly strong effect on small valve lift stages, In addition, it is particularly advantageous for the invention Arrangement of the pressure channel to fuel injection valves use that with two opening handles, for example so-called two spring holder nozzles, work.
  • FIG. 1 shows a longitudinal section through the combustion chamber side part of the fuel injection valve
  • FIG. 2 shows an enlarged detail of FIG Injector of Figure 1 in the region of the pressure channel
  • 3 shows a cross section through the figure 2 in height of Inlet opening of the pressure channel in the pressure chamber.
  • the fuel injection valve shown in the figure 1 for internal combustion engines has a valve body 1, the with its lower end in the combustion chamber one not closer illustrated internal combustion engine protrudes and one, from its upper, brennraumfernen end face 3 outgoing has central bore 5.
  • This as a blind hole trained hole 5 acts as axial Guide bore for a piston-shaped valve member 7, the at least in an upper combustion chamber remote section slidably sealingly guided in the bore 5.
  • the valve member 7 at its lower, combustion chamber facing end of a conically shaped Valve sealing surface 9 on, with which it is conical shaped valve seat surface 11 on the valve body. 1 interacts, which are closed at the inside End of the bore 5 is formed.
  • valve seat surface 11 From this valve seat surface 11 also performs an injection port 13, on the other hand opens into the combustion chamber of the internal combustion engine.
  • the Valve member 7 further has on its shaft an in Opening direction of the valve member 7 acting pressure shoulder 15, which is due to a cross-sectional reduction of Pressure valve member 7 in the direction of the combustion chamber end is formed.
  • the pressure shoulder 15 of the Valve member 7 in a pressure chamber 17, which by a radial extension of the bore 5 is formed, and the via an annular channel 19 to the valve seat surface 11th extends.
  • a pressure channel 21 in Valve body 1 is provided, the radially outward of the bore. 5 in the combustion chamber remote end face 3 of the valve body. 1 entering and obliquely to the axis of the valve body 1 extending enters the radially outer region of the pressure chamber 17.
  • the inclined pressure channel 21 In order to make a lateral impact of the through the pressure channel 21 in the pressure chamber 17 incoming fuel jet the valve member 7 and the associated Querkraftein effet to avoid the valve member 7 is the inclined pressure channel 21 also eccentric pivoted. It is as in Figures 2 and 3 shown, an outlet opening 23 of the pressure channel 21 in the pressure chamber 17 from a common longitudinal sectional plane with an inlet opening 25 of the pressure channel 21 at the top Swung out end face 3. The inlet opening 25 of the Pressure channel 21 and the outlet opening 23 are now in two, the longitudinal axis of the valve body 1 intersecting arranged in different longitudinal sections, the pivoted to each other about the longitudinal axis of the valve body 1 are.
  • the swivel angle ⁇ between a first Longitudinal section 27 through the inlet opening 25 and a second longitudinal section plane 29 through the outlet opening 23rd the pressure channel 21 is approximately in the embodiment 35 °, but may alternatively be smaller or larger be educated. It is essential only that the Pressure channel 21 forming inclined bore is pivoted so that whose outlet opening 23 is arranged in the pressure chamber 17 is that emerging from the pressure channel 21 Fuel jet off-center to the valve member 7 in the Pressure chamber 17 enters, so that this is not the valve member meets laterally and also a rotational flow in the Pressure chamber 17 generated.
  • the fuel injection valve according to the invention Internal combustion engine operates in a known manner, the Valve member 7 first of a closing force, preferably a valve spring is held in the closed position, in which the Valve sealing surface 9 on the valve member 7 sealingly on the fixed valve seat surface 11 is applied, so that the Fuel flow from the annular channel 19 to Injection opening 13 is closed. Should one High pressure fuel injection take place at the injection valve, flows under high pressure fuel from one external high-pressure fuel injection pump over not shown pressure lines in the pressure channel 21 and further in the pressure chamber 17 and engages there in the opening direction of the Valve member 7 on the pressure shoulder 15 at.
  • a closing force preferably a valve spring

Landscapes

  • Engineering & Computer Science (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 de carburant pour moteurs à combustion interne, comportant un obturateur (7) pouvant se déplacer axialement dans un alésage (5) d'un corps de soupape (1), cet obturateur présentant un épaulement de pression (15) agissant dans son sens d'ouverture et s'avançant dans une chambre de pression (17) qui peut être remplie avec du carburant sous haute pression, par l'intermédiaire d'un canal à fluide sous pression (21). Ce canal (21) est incliné de façon excentrique de telle sorte que le jet de carburant qui en sort pénètre dans la chambre de pression (17) en étant excentré par rapport à l'obturateur (7).

Claims (3)

  1. Injecteur de carburant pour des moteurs à combustion interne comportant :
    un organe de soupape (7) mobile axialement dans un perçage (5) d'un corps de soupape (1) contre une force de fermeture, et muni sur sa surface frontale côté chambre de combustion, d'une surface d'étanchéité de soupape (9) qui coopère avec une surface de siège de soupape (11) fixe pour commander une section de passage vers une ouverture d'injection (13) dans la chambre de combustion du moteur à combustion interne, et
    un épaulement de pression (15), situé sur l'organe de soupape (7), qui agit en direction de l'ouverture de l'organe de soupape et dépasse dans une chambre de pression (17), laquelle peut être remplie par une haute pression de carburant par l'intermédiaire d'un canal de pression (21),
    le canal de pression (21) partant d'une surface frontale (3) opposée à la chambre de combustion, en biais par rapport à l'axe du corps de soupape, et débouchant dans une zone extérieure radiale de la chambre de pression (17)
    caractérisé en ce qu'
    une ouverture d'entrée (25) du canal de pression (21) dans la surface frontale (3) - opposée à la chambre de combustion, du corps de soupape (1), et une ouverture de sortie (23) du canal de pression (21) dans la chambre de pression (17) sont disposées dans deux plans de section longitudinale qui coupent l'axe longitudinal du corps de soupape (1) et qui sont inclinés l'un par rapport à l'autre autour de l'axe longitudinal du corps de soupape (1), le canal de pression (21) étant un perçage incliné rectiligne.
  2. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    le canal de pression (21) est un perçage incliné dont l'ouverture de sortie (23) dans la chambre de pression (17) est en biais pour orienter le jet de carburant qui sort du canal de pression (21) est orienté de façon excentrée par rapport à l'organe de soupape (7).
  3. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    l'ouverture de sortie (23) du canal de pression (21) coupe la paroi périphérique de la chambre de pression (17).
EP99938165A 1998-09-09 1999-06-11 Soupape d'injection de carburant pour moteurs a combustion interne Expired - Lifetime EP1044327B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19841158 1998-09-09
DE19841158A DE19841158A1 (de) 1998-09-09 1998-09-09 Kraftstoffeinspritzventil für Brennkraftmaschinen
PCT/DE1999/001704 WO2000014398A1 (fr) 1998-09-09 1999-06-11 Soupape d'injection de carburant pour moteurs a combustion interne

Publications (2)

Publication Number Publication Date
EP1044327A1 EP1044327A1 (fr) 2000-10-18
EP1044327B1 true EP1044327B1 (fr) 2005-09-07

Family

ID=7880341

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99938165A Expired - Lifetime EP1044327B1 (fr) 1998-09-09 1999-06-11 Soupape d'injection de carburant pour moteurs a combustion interne

Country Status (5)

Country Link
US (1) US6367717B1 (fr)
EP (1) EP1044327B1 (fr)
JP (1) JP2002524684A (fr)
DE (2) DE19841158A1 (fr)
WO (1) WO2000014398A1 (fr)

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3511442A (en) * 1968-02-29 1970-05-12 Ambac Ind Sumpless fuel injection nozzle
DE2261726C2 (de) * 1972-12-16 1985-10-10 Klöckner-Humboldt-Deutz AG, 5000 Köln Kraftstoffeinspritzventil für Brennkraftmaschinen
EP0363142A1 (fr) * 1988-10-04 1990-04-11 LUCAS INDUSTRIES public limited company Injecteurs de combustible pour moteurs à combustion interne
US5207385A (en) * 1989-10-26 1993-05-04 Lucas Industries Public Limited Company Fuel injection nozzle
DE4303813C1 (de) * 1993-02-10 1994-06-30 Bosch Gmbh Robert Kraftstoffeinspritzdüse für Brennkraftmaschinen
US5449121A (en) * 1993-02-26 1995-09-12 Caterpillar Inc. Thin-walled valve-closed-orifice spray tip for fuel injection nozzle
GB9425652D0 (en) * 1994-12-20 1995-02-22 Lucas Ind Plc Fuel injection nozzle
DE19507171C1 (de) * 1995-03-02 1996-08-14 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
FI101170B (fi) * 1995-06-15 1998-04-30 Waertsilae Nsd Oy Ab Polttoaineen ruiskutusventtiilin ohjausjärjestely
DE19523243B4 (de) * 1995-06-27 2009-04-02 Robert Bosch Gmbh Kraftstoffeinspritzventil für Brennkraftmaschinen mit einer Spannmutter mit konisch ausgebildeter Ringschulter
US5899389A (en) * 1997-06-02 1999-05-04 Cummins Engine Company, Inc. Two stage fuel injector nozzle assembly

Also Published As

Publication number Publication date
JP2002524684A (ja) 2002-08-06
WO2000014398A1 (fr) 2000-03-16
EP1044327A1 (fr) 2000-10-18
US6367717B1 (en) 2002-04-09
DE59912526D1 (de) 2005-10-13
DE19841158A1 (de) 2000-03-16

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