EP0874152B1 - Throttling device - Google Patents

Throttling device Download PDF

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Publication number
EP0874152B1
EP0874152B1 EP98102040A EP98102040A EP0874152B1 EP 0874152 B1 EP0874152 B1 EP 0874152B1 EP 98102040 A EP98102040 A EP 98102040A EP 98102040 A EP98102040 A EP 98102040A EP 0874152 B1 EP0874152 B1 EP 0874152B1
Authority
EP
European Patent Office
Prior art keywords
duct
insert
throttle
throttle opening
throttle element
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
EP98102040A
Other languages
German (de)
French (fr)
Other versions
EP0874152A2 (en
EP0874152A3 (en
Inventor
Wolfgang Fehlmann
Andreas Dutt
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 EP0874152A2 publication Critical patent/EP0874152A2/en
Publication of EP0874152A3 publication Critical patent/EP0874152A3/en
Application granted granted Critical
Publication of EP0874152B1 publication Critical patent/EP0874152B1/en
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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/794—With means for separating solid material from the fluid

Definitions

  • the invention is based on a throttle element according to the preamble of the claim.
  • a throttle element according to the preamble of the claim.
  • the throttle opening formed coaxially to the cylindrical insert and so in a channel pressed in that the peripheral wall of the throttle element along the entire length Concludes the canal.
  • Such throttle elements have the disadvantage that they are in the Operation can become clogged by dirt particles, so that the liquid flow is prevented.
  • the throttle element for installation in a Fuel injection pump known.
  • This throttle element has a throttle opening, through the one from one room to another room of the fuel injection pump flowing liquid flow can be limited.
  • the throttle element is as an insert formed and borders with a peripheral wall sealing a liquid leading Channel on.
  • a filter is also provided upstream of the throttle opening.
  • connection channel 1 is a partial section from a fuel injection pump reproduced with a fuel under low pressure leading connection channel 1, the fuel one Pump suction chamber, which is not shown here, feeds and one substantially perpendicular to this connection channel 1 laxative channel 2, the fuel here should be fed to cooling electromagnets.
  • this amount of fuel supply through the channel 2 is in an insert 5 inserted into a bore part 4, preferably pressed. This is near the Branch of channel 2 from connecting channel 1. From the first, the first end facing away from the connecting channel 1 6 of the insert leads a blind hole 8 inside the Use that is carried out in stages here.
  • the blind hole 8 branches from this a radially extending Throttle bore 9 from which in an annular groove 10 in the Circumferential wall 11 of the insert opens out.
  • This Annular gap 14 has an overall cross section that is larger than the flow cross section of the throttle opening 9. But since this larger cross-section on the entire peripheral wall of the Distributed use, there is a gap width that is essential is smaller than the clear diameter of the throttle bore 9.
  • this is an annular gap excellent for filtering the inflowing fuel flow because of the engagement.
  • the arrangement of the throttle opening can of course also in other equivalent way. So this can somewhere else in a different way Connection between the ring groove and an outlet on the be arranged downstream side of the insert.

Description

Die Erfindung geht von einem Drossetelement nach der Gattung des Anspruchs aus. Bei einem solchen durch die DE-C1-41 42 998 bekannten Drosselelement ist die Drosselöffnung koaxial zu dem zylinderförmigen Einsatz ausgebildet und in einen Kanal so eingepresst, daß die Umfangswand des Drosselelements auf der gesamten Länge einen Abschluß des Kanals bildet. Solche Drosselelemente haben den Nachteil, daß sie sich im Betrieb durch Schmutzpartikel zusetzen können, so daß der Flüssigkeitsstrom unterbunden wird.The invention is based on a throttle element according to the preamble of the claim. at one such throttle element known from DE-C1-41 42 998 is the throttle opening formed coaxially to the cylindrical insert and so in a channel pressed in that the peripheral wall of the throttle element along the entire length Concludes the canal. Such throttle elements have the disadvantage that they are in the Operation can become clogged by dirt particles, so that the liquid flow is prevented.

Durch die US-A-5 360 164 ist ein Drosselelement zum Einbau in eine Kraftstoffeinspritzpumpe bekannt. Dieses Drosselelement weist eine Drosselöffnung auf, durch die ein von einem Raum zu einem anderen Raum der Kraftstoffeinspritzpumpe fließender Flüssigkeitsstrom begrenzbar ist. Das Drosselelement ist als ein Einsatz ausgebildet und grenzt mit einer Umfangswand dichtend an einen, Flüssigkeit führenden Kanal an. Ferner ist stromaufwärts der Drosselöffnung ein Filter vorgesehen.Through the US-A-5 360 164 is a throttle element for installation in a Fuel injection pump known. This throttle element has a throttle opening, through the one from one room to another room of the fuel injection pump flowing liquid flow can be limited. The throttle element is as an insert formed and borders with a peripheral wall sealing a liquid leading Channel on. A filter is also provided upstream of the throttle opening.

Durch die erfindungsgemäße Ausgestaltung gemäß den kennzeichnenden Merkmalen des Anspruchs 1 ist nun gewährleistet, daß auf der Zustromseite des Drosselelements ein Filter der Drosselöffnung vorgeschaltet ist, der dafür Sorge trägt, daß im Flüssigkeitsstrom zugeführte Schmutzpartikel bereits stromaufwärts der Drosselöffnung ausgefiltert werden. Vorteilhaft dabei ist, dass der Filter ein Ringspalt aufweist, der im Querschnitt zwar größer ist als der Querschnitt der Drosselöffnung, aber aufgrund der großen Länge des Ringspaltes die Spaltbreite sehr gering gehalten werden kann. Damit ergibt sich hier ein wirksamer Filtereffekt. Dabei ist es vorteilhaft, den Einsatz an eine Stelle des Kanals einzusetzen, der nahe einer rechtwinkligen Abzweigung desselben von einem anderen von Flüssigkeit durchströmten Kanals ist. Dabei ergibt sich, daß aufgrund der vorbeiströmende, nicht in den Kanal abgeführten Flüssigkeit Schmutzpartikel, die am Ringspalt zurückgehalten wurden wieder weggespült werden können.Due to the inventive design according to the characterizing features of Claim 1 is now guaranteed that on the inflow side of the throttle element Filter is upstream of the throttle opening, which ensures that in the Dirt particles fed in liquid flow are already upstream of the throttle opening be filtered out. It is advantageous that the filter has an annular gap which in the Cross section is larger than the cross section of the throttle opening, but due to the large length of the annular gap, the gap width can be kept very small. In order to this results in an effective filter effect. It is advantageous to use one Location of the canal to be used near a right-angled junction another flowed through with liquid Channel is. It turns out that because of the flowing past, liquid not discharged into the sewer, dirt particles, those that were held back at the annular gap were washed away again can be.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird in der nachfolgenden Beschreibung näher erläutert.An embodiment of the invention is in the drawing shown and is described in more detail in the following description explained.

Beschreibungdescription

In der Figur ist ein Teilausschnitt aus einer Kraftstoffeinspritzpumpe wiedergegeben mit einem Kraftstoff unter Niederdruck führenden Verbindungskanal 1, der Kraftstoff einem Pumpensaugraum, der hier nicht weiter gezeigt ist, zuleitet und einem im wesentlichen rechtwinklig von diesem Verbindungskanal 1 abführenden Kanal 2, der hier Kraftstoff einem zu kühlenden Elektromagneten zuführten soll. Zur Dosierung dieser Kraftstoffzuführungsmenge durch den Kanal 2 ist in diesen in ein Bohrungsteil 4 ein Einsatz 5 eingefügt, vorzugsweise eingepreßt. Dieser befindet sich nahe der Abzweigung des Kanals 2 vom Verbindungskanal 1. Von der ersten, dem Verbindungskanal 1 abgewandten ersten Stirnseite 6 des Einsatzes führt ein Sackloch 8 ins Innere des Einsatzes, das hier gestuft ausgeführt ist. Nahe dem Ende des Sackloches 8 zweigt von diesem eine radial verlaufende Drosselbohrung 9 ab, die in eine Ringnut 10 in der Umfangswand 11 des Einsatzes mündet. An dem an die Ringnut 10 zur Seite des Verbindungskanals angrenzenden Teil des Einsatzes der dort seine zweite Sirnseite 17 aufweist, weist dieser an seinem Umfang einen verkleinerten Durchmesser auf, so daß die Mantelfläche an dieser Stelle zur Wand des Bohrungsteils 4 einen Ringspalt 14 bildet, der Teil der Verbindung zwischen dem stromaufwärts und dem stromabwärts des Einsatzes liegenden Teilen des Kanals 2 ist. Dieser Ringspalt 14 hat einen Gesamtquerschnitt, der größer ist als der Durchflußquerschnitt der Drosselöffnung 9. Da sich aber dieser größere Querschnitt auf die gesamte Umfangswand des Einsatzes verteilt, ergibt sich eine Spaltbreite, die wesentlich kleiner ist als der lichte Durchmesser der Drosselbohrung 9. Aufgrund dieser Eigenschaft ist dieser Ringspalt hervorragend geeignet zur Filterung des zufließenden Kraftstoffstromes durch den Einsatz. Diese in Strömungsrichtung der Drosselbohrung vorgeschaltete Filterstelle hält alle Schmutzpartikel ab, die die Funktion der Drosselöffnung 9 stören könnten. Dadurch, daß sich ferner das Ende des Ringspaltes 14 innerhalb eines Totwassergebietes, nämlich der kurze Sackteil zwischen Verbindungskanal 1 und der zweiten Stirnseite 17 des Einsatzes, ergeben sich Wirbelungen innerhalb dieses Bereiches die wiederum geeignet sind, zurückgehaltene Schmutzpartikel von einer Anlagerung an dem Eintritt zum Ringspalt wegzuhalten oder diese wieder von dort abzulösen. Somit ist gewährleistet, daß dieser Ringspalt sich nicht zusetzt. Auf diese Weise erhält man eine über die Betriebsdauer gleichmäßig wirkende Drossel zur Steuerung des Kraftstoffflusses vom Verbindungskanal in den Kanal 2 hinein und z.B. zu einem danach folgenden Elektromagneten.In the figure is a partial section from a fuel injection pump reproduced with a fuel under low pressure leading connection channel 1, the fuel one Pump suction chamber, which is not shown here, feeds and one substantially perpendicular to this connection channel 1 laxative channel 2, the fuel here should be fed to cooling electromagnets. For dosage this amount of fuel supply through the channel 2 is in an insert 5 inserted into a bore part 4, preferably pressed. This is near the Branch of channel 2 from connecting channel 1. From the first, the first end facing away from the connecting channel 1 6 of the insert leads a blind hole 8 inside the Use that is carried out in stages here. Near the end the blind hole 8 branches from this a radially extending Throttle bore 9 from which in an annular groove 10 in the Circumferential wall 11 of the insert opens out. On the ring groove 10 to the side of the connecting channel adjacent part of Insert, which has its second face 17 there, points this has a reduced diameter at its circumference, so that the lateral surface at this point to the wall of the Bore part 4 forms an annular gap 14 which is part of the Connection between the upstream and the downstream parts of channel 2 lying in the insert. This Annular gap 14 has an overall cross section that is larger than the flow cross section of the throttle opening 9. But since this larger cross-section on the entire peripheral wall of the Distributed use, there is a gap width that is essential is smaller than the clear diameter of the throttle bore 9. Because of this property, this is an annular gap excellent for filtering the inflowing fuel flow because of the engagement. This in the direction of flow the filter point upstream of the throttle bore holds all Dirt particles from the function of the throttle opening 9 could disturb. The fact that the end of the annular gap 14 within a dead water area, namely the short part of the bag between connecting channel 1 and the second Front 17 of the insert, there is turbulence within this area which in turn are suitable retained dirt particles from an accumulation on the Keep entry to the annular gap or keep it from to replace there. This ensures that this annular gap does not clog. This way you get one Over the operating period, the throttle works evenly Control of the fuel flow from the connection channel into the Into channel 2 and e.g. to a subsequent electromagnet.

Die Anordnung der Drosselöffnung kann natürlich auch in anderer äquivalenter Weise ausgeführt werden. So kann diese auch irgendwo anders in einer andersartig ausgestalteten Verbindung zwischen Ringnut und einem Austritt auf der stromabwärts liegenden Seite des Einsatzes angeordnet sein.The arrangement of the throttle opening can of course also in other equivalent way. So this can somewhere else in a different way Connection between the ring groove and an outlet on the be arranged downstream side of the insert.

Claims (5)

  1. Throttle element for installation in a fuel injection pump having a throttle opening (9) through which a stream of fluid which flows from one space (1) to another space (4) of the fuel injection pump can be limited, the throttle element being embodied as an insert (5) and having part of a circumferential wall (11) which in a sealing fashion adjoins the wall (4) of a duct (2) which conducts fluid, the throttle opening (9) being arranged between the two sides of the insert (5), and a filter being provided upstream of the throttle opening (9), characterized in that an annular groove (10) is provided between the wall (4) of the duct and the insert (5) and is arranged downstream of the throttle opening (9), and a circumferential wall, adjoining the annular groove (10) upstream thereof, of the insert (5) forms, in the wall (4) of the duct (2), an annular gap (14) which serves as a filter and which forms part of the connection between the sides of the insert (5), the cross section of the annular gap (14) being larger than the cross section of the throttle opening (9).
  2. Throttle element according to Claim 1, characterized in that the annular groove (10) is arranged in the circumferential wall (11) of the insert (5).
  3. Throttle element according to Claim 1 or 2, characterized in that the insert (5) is installed in the duct (2) at the location on the duct (2) at which the duct (2) branches off, essentially at a right angle on the inflow side, from a connecting duct (1) through which the fluid flows.
  4. Throttle element according to Claim 3, characterized in that the duct (2) forms, with the connecting duct (1), a dead water zone between a second end side (17) of the insert (5) and the connecting duct (1).
  5. Throttle element according to one of the preceding claims, characterized in that the insert (5) is embodied as a cylindrical part which is pressed into the duct (2) and has a circular cross section and a circumferential region which is reduced in diameter in order to form the annular gap (14), and the throttle opening is arranged in a duct which starts radially from the annular groove (10) and opens into the blind hole.
EP98102040A 1997-04-25 1998-02-06 Throttling device Expired - Lifetime EP0874152B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29707496U DE29707496U1 (en) 1997-04-25 1997-04-25 Throttle element
DE29707496U 1997-04-25

Publications (3)

Publication Number Publication Date
EP0874152A2 EP0874152A2 (en) 1998-10-28
EP0874152A3 EP0874152A3 (en) 2000-10-25
EP0874152B1 true EP0874152B1 (en) 2004-10-06

Family

ID=8039537

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98102040A Expired - Lifetime EP0874152B1 (en) 1997-04-25 1998-02-06 Throttling device

Country Status (4)

Country Link
US (1) US6162029A (en)
EP (1) EP0874152B1 (en)
JP (1) JP4243365B2 (en)
DE (2) DE29707496U1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10048365B4 (en) * 2000-09-29 2005-01-27 Robert Bosch Gmbh Cartridge-type ammunition i.e. garnet ammunition, has projectile and casing that are connected over connection, where connection has membrane with breaking point or opening point opened during preset pressure in high pressure chamber
JP3841054B2 (en) * 2002-08-08 2006-11-01 株式会社デンソー Filter and fuel injection device using the same
DE102012207431A1 (en) * 2012-05-04 2013-11-07 Robert Bosch Gmbh High-pressure fuel pump
GB2564654A (en) * 2017-07-17 2019-01-23 Delphi Int Operations Luxembourg Sarl High pressure fuel pump
DE102022205544A1 (en) 2022-05-31 2023-11-30 Robert Bosch Gesellschaft mit beschränkter Haftung Throttle element
US11753996B1 (en) * 2022-08-25 2023-09-12 Collins Engine Nozzles, Inc. Fuel injector manifold having trim device therein

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE407584C (en) * 1924-05-25 1924-12-24 Maschf Augsburg Nuernberg Ag Pressure valve for the injection line of internal combustion engines with airless injection
GB925937A (en) * 1959-06-05 1963-05-15 Tatra Np Improvements in and relating to fuel injection arrangements for compression-ignitionengines
US4186909A (en) * 1978-05-23 1980-02-05 Dynex/Rivett, Inc. Fail-to-neutral module
US4676273A (en) * 1986-10-07 1987-06-30 General Motors Corporation Electro-hydraulic pressure regulating valve
GB8828157D0 (en) * 1988-12-02 1989-01-05 Lucas Ind Plc Fuel injection nozzles
DE4142998C1 (en) * 1991-12-24 1993-07-22 Robert Bosch Gmbh, 7000 Stuttgart, De
DE4237469B4 (en) * 1992-11-06 2004-05-13 Robert Bosch Gmbh Fuel injection device, in particular pump nozzle for internal combustion engines
US5333637A (en) * 1993-06-11 1994-08-02 Rosemount Inc. Pneumatic instrument particle trap
DE29710159U1 (en) * 1997-06-11 1998-10-08 Bosch Gmbh Robert Throttle element

Also Published As

Publication number Publication date
DE59812059D1 (en) 2004-11-11
DE29707496U1 (en) 1998-08-20
US6162029A (en) 2000-12-19
JPH10325375A (en) 1998-12-08
JP4243365B2 (en) 2009-03-25
EP0874152A2 (en) 1998-10-28
EP0874152A3 (en) 2000-10-25

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