EP1040270B1 - 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
EP1040270B1
EP1040270B1 EP99929069A EP99929069A EP1040270B1 EP 1040270 B1 EP1040270 B1 EP 1040270B1 EP 99929069 A EP99929069 A EP 99929069A EP 99929069 A EP99929069 A EP 99929069A EP 1040270 B1 EP1040270 B1 EP 1040270B1
Authority
EP
European Patent Office
Prior art keywords
fuel
fuel filter
injection valve
filter
section
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
EP99929069A
Other languages
German (de)
English (en)
Other versions
EP1040270A1 (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 EP1040270A1 publication Critical patent/EP1040270A1/fr
Application granted granted Critical
Publication of EP1040270B1 publication Critical patent/EP1040270B1/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
    • F02M61/165—Filtering elements specially adapted in fuel inlets to injector

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 according to the preamble of claim 1 out.
  • Such a known from DE 196 08 608 Fuel injector has one of one Connection piece for a fuel injection line laxative fuel inlet channel to one Injection opening in the combustion chamber of the one to be supplied Internal combustion engine opens.
  • Dirt particles and chips in the fuel are a rod-shaped Fuel filter inserted into the inlet channel, which is connected to the its axial end faces provided in a collar Bore of the fuel supply channel is guided.
  • the Rotationally symmetrical filter body of the fuel filter has one in diameter between its collar surfaces reduced middle section.
  • this middle section are two groups of axially closed on one side Longitudinal grooves incorporated, of which a first group of an upper end face facing away from the injection opening and a second group from one of the injection port facing lower end face of the filter body.
  • the longitudinal grooves of the first and second groups alternately distributed over the circumference of the filter body arranged.
  • the known fuel injection valve has the Disadvantage that the fuel filter is a relatively large Dead volume is formed.
  • the known ones are therefore sufficient Fuel injectors for use on direct injection Internal combustion engines no longer required high injection pressures.
  • the fuel injector according to the invention for Internal combustion engines with the characteristic features of the Claim 1 has the advantage that the coordination of the flow cross-sections on the fuel filter and the inlet channel to the total injection cross section of the Injector the pressure drops within the Fuel inlet channel and in particular on the fuel filter can be greatly reduced. Furthermore, with the Training of the fuel injector according to the invention the dead volume in the fuel inlet channel and on Fuel filter can be reduced, which in terms of Injection process once again has a positive effect. there are these improvements by the invention Interpretation of the size of the flow cross section on Fuel filter and the flow cross section of the Fuel inlet channel downstream of the fuel filter achieved, the five to ten times the size of the total flow area all injection openings on the fuel injector should be.
  • the flow cross section on Fuel inlet and at the fuel outlet of the Fuel filter the same size or slightly larger form than the cross section of the Fuel filter downstream area of the Fuel supply channel.
  • throttle losses can Fuel filters can be safely excluded.
  • Another The advantage is the reduction in the number of longitudinal grooves in the filter body from six grooves to four grooves reached. In this way, the dead volume on Filter end and the throttle losses at Fuel transfer between the individual longitudinal grooves of the be reduced in both groups.
  • the Longitudinal recesses on the fuel filter as longitudinal grooves or but also be designed as surfaces.
  • the fuel inlet channel has the filter body of the Fuel filter also on its lower, outlet side End a stop cone with which the fuel filter on a complementary conical seat of the Inlet channel is present.
  • a stop cone with which the fuel filter on a complementary conical seat of the Inlet channel is present.
  • the conical seat surface is in the fuel inlet channel and the stop cone surface interacting with this Fuel filter preferably with a cone angle between 45 and 90 ° trained. It is also particularly advantageous the bevelled surface grinding in the stop cone surface also form with such a cone angle.
  • Fuel injection valve for internal combustion engines is in shown in the drawing and will be described in more detail below explained.
  • FIG. 1 shows a longitudinal section through a known Fuel injection valve
  • Figure 2 is an enlarged Partial section from Figure 1 with the invention Training of the fuel filter and the inlet channel and the Figures 3 to 7 different views of the fuel filter in a single part representation.
  • Fuel injection valve for internal combustion engines one in the combustion chamber of the one to be supplied Internal combustion engine projecting valve body 1, which means a clamping nut 3 with the interposition of one Intermediate plate 5 axially against a valve holding body 7 is tense.
  • a piston-shaped valve member 11 axially guided with its lower combustion chamber end face one Forms valve sealing surface 13 with which the valve member 11 for Control of an opening cross section with an inward protruding valve seat 15 on the guide bore 9 interacts.
  • the valve seat 15 is downstream at least one injection opening 17 arranged by the guide bore 9 starting in the combustion chamber Internal combustion engine opens.
  • a valve spring 21 is arranged the valve member 11 towards the valve seat 15 in the closing direction applied.
  • a Fuel inlet channel 23 is provided, the Valve holding body 7 axially from one at its top, the Injection opening 17 facing end face provided Connection piece 25 for a not shown Fuel injection line up to the intermediate washer 5 penetrates and of two bore sections 26, 27th of different diameters.
  • the lower Bore section 27 of the fuel inlet channel 23 opens thereby to a connecting channel 29 of the Fuel inlet channel 23, which the intermediate disc 5th penetrating into a surrounding the valve member 11
  • Pressure chamber 31 opens out, which is an annular gap on the shaft of the Valve member 11 extends to the valve seat 15.
  • the valve member 11 In the area of the pressure chamber 31 is the valve member 11 with one of Valve seat 15 facing pressure shoulder 33 provided on the the high fuel pressure in the opening direction on the valve member 11 attacks.
  • a fuel filter 35 with a rod-shaped filter body used, the incoming fuel for passage through narrow gaps forces between the profiled outer circumference of the Filter body 35 and the surrounding wall of the Bore section 26 of the fuel inlet channel 23 are formed.
  • the fuel is filtered and carried dirt particles and chips from a certain Size held back.
  • Fuel filter 35 has one rod-shaped filter body on its axial ends, cross-sectional extensions forming a bundle having.
  • One forms the injection opening 13 facing upper collar a press fit 37 and a lower collar facing the injection opening 13 Guide collar 55.
  • the fuel filter 35 in its lateral surface two groups of axially one-sided closed longitudinal grooves, of which a first group of longitudinal grooves 39 from one of the injection opening 13 facing away from the upper end face 41.
  • a second Group of longitudinal grooves 43 goes from one of the injection opening 13 facing lower end face 45 of the fuel filter 35 out. As shown in FIGS.
  • FIG 3 to 7 two longitudinal grooves 39 and two longitudinal grooves 43 provided that alternate over the scope of the Fuel filter 35 are arranged distributed.
  • Figure 3 shows a first side view of the fuel filter 35 and FIGS. 4 and 5 each show a view from above and below on this side view.
  • 6 is a Cross section of the fuel filter body 35 shown.
  • the Figure 7 shows a further 90 ° around the longitudinal axis Figure 3 rotated representation of the invention Fuel filter 35.
  • the fuel filter 35 has, as shown in Figure 7 a stop cone 47 on its lower end face 45, with which he on a conical seat 49 of the inlet channel 23 is present.
  • This conical seat 49 is the Inlet channel 23 at the cross-section transition between the upper Bore section 26 with a larger diameter in the Diameter smaller lower bore section 27 formed.
  • the cone angle of the stop cone 47 and the conical Seat 49 is 60 ° in the exemplary embodiment, can but alternatively be designed between 45 and 90 °.
  • Fuel inlet channel 23 are two sloping Surface grinding 51 worked into the stop cone 47, the starting from the lower end face 45 in the Open longitudinal grooves 43 and preferably the same Have cone angles like the stop cone 47. Farther is at the upper end of the fuel filter 35 remote from the injection a chamfer 53 at the transition between the upper end face 41 provided to the circumferential surface of the press collar 37.
  • the smallest cross section of the lower one Fuel inlet channel section 27 the flow cross section of the fuel supply channel 23.
  • the entire Flow cross-section at the fuel filter 35 is by the sum of all trailing edges between the individual groups of longitudinal grooves 39, 43 and the Overflow areas at the inlet and outlet areas of the Press fit collar 37 and the surface grinding 51 determined.
  • the flow cross-section is at the fuel inlet and at the fuel outlet of the fuel filter 35 the same size or slightly larger than that Flow cross section of the fuel inlet channel 23 in Area of bore 27.

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 (7)

  1. Soupape d'injection de carburant pour des moteurs à combustion interne comportant un canal d'alimentation en carburant (23) partant d'un ajutage de branchement (25) en débouchant à au moins un orifice d'injection (17) et logeant un filtre à carburant (35) en forme de tige guidé par ses extrémités axiales dans le canal d'alimentation et dont la surface-enveloppe comporte deux groupes de rainures longitudinales usinées, fermées axialement d'un côté, dont un premier groupe (39) part d'une surface frontale (41) supérieure à l'opposé de l'orifice d'injection (17) et un second groupe (43) part d'une surface frontale inférieure (45) tourné vers l'orifice d'injection (17) du filtre à carburant (35),
    caractérisée en ce que
    la dimension de la section de passage, au niveau du filtre à carburant (35) et la dimension de la section de passage du canal d'alimentation en carburant (23) dans la zone (27) en aval du filtre à carburant (35), représentent entre 5 et 10 fois la dimension de toute la section de passage de tous les orifices d'injection (17) de la soupape d'injection de carburant.
  2. Soupape d'injection de carburant selon la revendication 1,
    caractérisée en ce que
    la section de passage à l'entrée de carburant et à la sortie de carburant du filtre à carburant (35) est identique ou légèrement supérieure à la section de passage de la zone (27) du canal d'alimentation de carburant (23) adjacente en aval du filtre à carburant (35).
  3. Soupape d'injection de carburant selon la revendication 1,
    caractérisée en ce que
    chaque groupe de rainures longitudinales (39, 43) fermées d'un côté comporte deux rainures longitudinales ou surfaces, les rainures longitudinales du premier et du second groupe (39, 43) étant réparties en alternance à la périphérie du filtre à carburant (35).
  4. Soupape d'injection de carburant selon la revendication 1,
    caractérisée par
    un congé (53) prévu au niveau de la surface frontale supérieure (41) du filtre à carburant (35), surface formant une zone d'entrée de carburant.
  5. Soupape d'injection de carburant selon la revendication 1,
    caractérisée par
    un cône de butée (47) prévu au niveau de la surface frontale inférieure (45) du côté de sortie du filtre à carburant (35), cône de butée par lequel le filtre à carburant (35) s'applique contre une surface formant siège conique (49) du canal d'alimentation (23).
  6. Soupape d'injection de carburant selon la revendication 5,
    caractérisée en ce que
    le cône de butée (47) comporte deux surfaces meulées (53), en biais, qui débouchent dans les rainures longitudinales (43) du second groupe, ouvert vers l'orifice d'injection (17).
  7. Soupape d'injection de carburant selon la revendication 5,
    caractérisée en ce que
    le cône de butée (47) du filtre à carburant (35) et la surface conique (49) dans le canal d'alimentation en carburant (23) présentent un angle de cône compris entre 45° et 90°.
EP99929069A 1998-07-22 1999-05-03 Soupape d'injection de carburant pour moteurs a combustion interne Expired - Lifetime EP1040270B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19832940 1998-07-22
DE19832940A DE19832940A1 (de) 1998-07-22 1998-07-22 Kraftstoffeinspritzventil für Brennkraftmaschinen
PCT/DE1999/001284 WO2000005500A1 (fr) 1998-07-22 1999-05-03 Soupape d'injection de carburant pour moteurs a combustion interne

Publications (2)

Publication Number Publication Date
EP1040270A1 EP1040270A1 (fr) 2000-10-04
EP1040270B1 true EP1040270B1 (fr) 2004-08-04

Family

ID=7874899

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99929069A Expired - Lifetime EP1040270B1 (fr) 1998-07-22 1999-05-03 Soupape d'injection de carburant pour moteurs a combustion interne

Country Status (5)

Country Link
US (1) US6186420B1 (fr)
EP (1) EP1040270B1 (fr)
JP (1) JP2002521605A (fr)
DE (2) DE19832940A1 (fr)
WO (1) WO2000005500A1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4078781B2 (ja) * 2000-03-01 2008-04-23 株式会社デンソー インレットフィルタ
FR2874973B1 (fr) * 2004-09-09 2009-02-13 Renault Sas Circuit d'alimentation en combustible sous pression a moyens de filtrage et d'amortissement
DE102004046888A1 (de) * 2004-09-28 2006-03-30 Robert Bosch Gmbh Injektor zur Kraftstoffeinspritzung an einer Brennkraftmaschine
JP4682977B2 (ja) * 2006-12-27 2011-05-11 株式会社デンソー フィルタおよびそれを備えた燃料噴射弁
DE202007002290U1 (de) 2007-01-09 2007-04-19 Reich Gmbh Filter mit Filternuten
DE102007002071A1 (de) 2007-01-09 2008-07-10 Reich Gmbh Filter mit Filternuten
US8500045B2 (en) * 2009-07-20 2013-08-06 Caterpillar Inc. Parallel circuit fuel filtration for fuel injectors
DE102009029312A1 (de) 2009-09-09 2011-03-10 Robert Bosch Gmbh Kraftstoffeinspritzvorrichtung
DE102009045347A1 (de) 2009-10-06 2011-04-07 Robert Bosch Gmbh Kraftstofffilter für ein Kraftstoffeinspritzventil
DE102011053113B4 (de) * 2011-08-30 2017-06-29 L'orange Gmbh Filteranordnung, insbesondere für Kraftstoffinjektoren
DE102012224388A1 (de) 2012-12-27 2014-07-03 Robert Bosch Gmbh Zweiteiliger Partikelfilter und Verfahren zu seiner Herstellung

Family Cites Families (22)

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Publication number Priority date Publication date Assignee Title
US1157315A (en) * 1913-08-05 1915-10-19 Gen Electric Fuel-injector.
US1964218A (en) * 1931-03-17 1934-06-26 Firm Hannoversche Maschb Actie Means for filtering the fuel supplied to the injector nozzles of internal combustion engines
US2067131A (en) * 1935-08-05 1937-01-05 Timken Roller Bearing Co Fuel injector
US3499605A (en) * 1967-12-22 1970-03-10 Allis Chalmers Mfg Co Nozzle holder
JPS5617717Y2 (fr) * 1976-12-20 1981-04-24
US4312479A (en) * 1980-02-19 1982-01-26 Stanadyne, Inc. Fuel injection nozzle with edge filter
JPS61107969U (fr) * 1984-12-21 1986-07-09
JP2703203B2 (ja) * 1987-09-25 1998-01-26 株式会社日立製作所 電磁式燃料噴射弁
GB2220984A (en) * 1988-07-20 1990-01-24 Lucas Ind Plc Fuel injection nozzle
JP2539522B2 (ja) * 1988-12-28 1996-10-02 株式会社日立製作所 電磁式燃料噴射弁
JPH036052U (fr) * 1989-06-06 1991-01-22
JPH0417768A (ja) * 1990-05-02 1992-01-22 Nippondenso Co Ltd 燃料噴射弁用バーフィルタ
JP2568323B2 (ja) * 1991-06-28 1997-01-08 株式会社日立製作所 弁座付きノズル及びその製造方法、電磁弁
JP3139162B2 (ja) * 1992-09-28 2001-02-26 株式会社デンソー 燃料噴射ノズル
DE4237469B4 (de) * 1992-11-06 2004-05-13 Robert Bosch Gmbh Kraftstoffeinspritzeinrichtung, insbesondere Pumpedüse für Brennkraftmaschinen
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US5879553A (en) * 1996-12-17 1999-03-09 Caterpillar Inc. Apparatus for filtering particulate matter from a fluid and method of making same

Also Published As

Publication number Publication date
US6186420B1 (en) 2001-02-13
EP1040270A1 (fr) 2000-10-04
DE19832940A1 (de) 2000-01-27
WO2000005500A1 (fr) 2000-02-03
JP2002521605A (ja) 2002-07-16
DE59910131D1 (de) 2004-09-09

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