EP1228305A2 - Resilient sleeve, especially for injection valves on otto engines - Google Patents

Resilient sleeve, especially for injection valves on otto engines

Info

Publication number
EP1228305A2
EP1228305A2 EP00984880A EP00984880A EP1228305A2 EP 1228305 A2 EP1228305 A2 EP 1228305A2 EP 00984880 A EP00984880 A EP 00984880A EP 00984880 A EP00984880 A EP 00984880A EP 1228305 A2 EP1228305 A2 EP 1228305A2
Authority
EP
European Patent Office
Prior art keywords
socket
socket according
injection valves
bushing
resilient sleeve
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.)
Granted
Application number
EP00984880A
Other languages
German (de)
French (fr)
Other versions
EP1228305B1 (en
Inventor
Bernhard Miedl
Martin Zeis
Bernd Lauterbach
Eduard Lippert
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.)
Volkswagen AG
Innotec Forschungs und Entwicklungs GmbH
Original Assignee
Volkswagen AG
Innotec Forschungs und Entwicklungs 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 Volkswagen AG, Innotec Forschungs und Entwicklungs GmbH filed Critical Volkswagen AG
Publication of EP1228305A2 publication Critical patent/EP1228305A2/en
Application granted granted Critical
Publication of EP1228305B1 publication Critical patent/EP1228305B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • F02M61/14—Arrangements of injectors with respect to engines; Mounting of injectors

Definitions

  • the invention relates to a resilient bushing, in particular for use with injection valves on Otto engines according to the preamble of claim 1.
  • Injectors on petrol engines are usually attached to the cylinder head by claws or union nuts.
  • the disadvantage here is that there is almost always an unevenly distributed contact pressure. This results in sealing problems.
  • the necessarily and inevitably occurring temperature changes and uneven temperature distributions also lead to considerable problems in the prior art described above.
  • the object of the invention is to create a bushing which can be used as an intermediate element and with which the deviations from predetermined setpoints resulting from temperature changes, unequal temperature distribution and manufacturing-related tolerances can be compensated for with little effort.
  • Such a bushing designed as a spring element, is on the one hand able to generate high, defined clamping forces and, on the other hand, compensate for shape errors and deviations from the target values between the two contact surfaces of the bushing, without otherwise impairing the function.
  • FIG. 1 is a side view according to I-I in Fig. 2 of an essentially circular resilient bush according to the invention, which extends over a circumference of about 270 °,
  • Fig. 3 is a side view of the resilient socket according to III-III in Fig. 2 and finally
  • Fig. 4 is a settlement of such a resilient socket
  • the resilient bushing 10 shown in FIG. 1 is placed on one level with its support surface 11 which runs in one plane and which lies on the right edge in this FIG. 1. If such a socket for an injection valve comes on one
  • the socket 10 is inserted with its flat bearing surface 11 in a corresponding cylindrical bore of the cylinder head.
  • the other end 12 of the resilient bush 10, shown on the left in FIG. 1, is supported on a second surface which, in the case of an Otto engine with fuel injection, can represent a so-called “rail” (fuel distributor pipe).
  • the jacket of the resilient bush 10 preferably extends over a circumferential angle of approximately 270 °. This leaves an opening angle of approximately 90 ° of the circumference.
  • this opening angle enables a relatively high flexibility of the bushing in the circumferential direction. tung. It can be expanded or reduced to a certain extent in its diameter with the appropriate effort.
  • the opening angle enables the fuel and electrical connections for the injection valve to enter from the side.
  • the resilient bushing 10 has two such windows 13, which are diametrically opposite in the y-axis, with an arcuate upper end.
  • Such a resilient bush 10 can be produced in an extremely simple manner from a suitable flat material.
  • the blank of the bushing then initially has the shape according to FIG. 4.
  • a socket 10 described above is produced with a substantially circular circumference.
  • the resilient bush then extends - as described above - over a circumferential angle of approximately 270 °.
  • the socket 10 can be produced with only a small amount of production work and replaces a large number of individual parts which were previously required. This results in considerable advantages, particularly in modern assembly line technology.
  • the arcs 15 lying in the y-axis have resilient properties.
  • error angles ⁇ lying approximately in the y-axis can be compensated for by slight deformations of one or the other arc 15 of the bushing 10.
  • the softness and thus the spring action of the arches 15 can be influenced by a second, smaller arch 15a.
  • corrections in the effective diameter of the bushing 10 can also be made by elastic deformations.
  • the effective diameter is reduced by elastically compressing the sleeve wall. When the corresponding forces decrease, the diameter widens again.
  • the flat blank of the bushing shown in FIG. 4 can be produced in large series in one operation from flat material.
  • the socket 10 which can be produced with little effort, exhibits properties which are comparable to those of a considerably more complex cardan joint.

Landscapes

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

Abstract

The invention relates to a resilient sleeve, especially for injection valves on Otto engines, which is suitable for compensating manufacturing and adjustment tolerances effectively and reliably. This takes place through rolling out processes on two diametrically opposite caps (14) in a first direction and through the displacement of diametrically opposite, arched elastic elements (15) in a second direction at right angles to the first.

Description

Federnde Buchse, insbesondere für Einspritzventile an Otto-Motoren Spring bushing, especially for injection valves on Otto engines
Die Erfindung bezieht sich auf eine federnde Buchse, insbesondere für den Einsatz bei Einspritzventilen an Otto-Motoren gemäß Oberbegriff des Anspruchs 1.The invention relates to a resilient bushing, in particular for use with injection valves on Otto engines according to the preamble of claim 1.
Üblicherweise werden Einspritzventile an Otto-Motoren durch Pratzen bzw. Überwurfmuttern am Zylinderkopf befestigt. Von Nachteil ist dabei, dass fast immer eine ungleichmäßig verteilte Anpresskraft entsteht. Daraus resultierend ergeben sich Dichtungsprobleme. Auch die notwendigerweise und zwangsläufig entstehenden Temperaturwechsel sowie ungleichmäßige Temperaturverteilungen führen bei dem oben geschilderten Stand der Technik zu erheblichen Problemen.Injectors on petrol engines are usually attached to the cylinder head by claws or union nuts. The disadvantage here is that there is almost always an unevenly distributed contact pressure. This results in sealing problems. The necessarily and inevitably occurring temperature changes and uneven temperature distributions also lead to considerable problems in the prior art described above.
Entsprechende Probleme ergeben sich aber auch ganz allgemein, wenn fertigungstechnisch nicht auszuschließende Abweichungen von Sollwerten auftreten. Die Auswirkungen sind dann nahezu die gleichen, wie die weiter oben geschilderten. Der Erfindung liegt die Aufgabe zugrunde, eine als Zwischenelement verwendbare Buchse zu schaffen, mit der sich die aus Temperaturwechsel, ungleicher Temperaturverteilung sowie fertigungbedingten Toleranzen ergebenden Abweichungen von vorgegebenen Sollwerten mit geringem Aufwand ausgeglichen werden können.Corresponding problems also arise in general if there are deviations from setpoints that cannot be ruled out in terms of production technology. The effects are then almost the same as those described above. The object of the invention is to create a bushing which can be used as an intermediate element and with which the deviations from predetermined setpoints resulting from temperature changes, unequal temperature distribution and manufacturing-related tolerances can be compensated for with little effort.
Die Lösung der Aufgabe ergibt sich aus den Merkmalen des Anspruchs 1.The solution to the problem results from the features of claim 1.
Vorteilhafte Weiterbildungen ergeben sich aus den Unteransprüchen .Advantageous further developments result from the subclaims.
Eine solche, als Federelement ausgebildete Buchse ist einer- seits in der Lage, hohe definierte Spannkräfte zu erzeugen und andererseits Formfehler und Abweichungen von den Sollwerten zwischen den beiden Anlageflächen der Buchse auszugleichen, ohne die Funktion im übrigen zu beeinträchtigen.Such a bushing, designed as a spring element, is on the one hand able to generate high, defined clamping forces and, on the other hand, compensate for shape errors and deviations from the target values between the two contact surfaces of the bushing, without otherwise impairing the function.
Dennoch ist ein sicherer dichtender Sitz gewährleistet, da die weiter oben erwähnte Buchse zentriεrch-axial federnd gestaltet ist und darüber hinaus Winkelabweichungen und Qwuer- kräfte in x- und y-Achse auszugleichen vermag. Die Erfindung wird nachfolgend unter Bezugnahme auf die Zeichnungsfiguren beispielsweise erläutert. Es zeigen:Nevertheless, a secure, tight fit is ensured, since the bushing mentioned above is designed to be axially resilient and can also compensate for angular deviations and force in the x and y axes. The invention is explained below with reference to the drawing figures, for example. Show it:
Fig. 1 eine Seitenansicht gemäß I-I in Fig. 2 einer erfindungsgemäßen, im wesentlichen kreisrunden federnden Buchse, die sich über einen Umfang von etwa 270° erstreckt,1 is a side view according to I-I in Fig. 2 of an essentially circular resilient bush according to the invention, which extends over a circumference of about 270 °,
Fig. 2 eine Draufsicht auf eine solche Buchse,2 is a plan view of such a socket,
Fig. 3 eine Seitenansicht der federnden Buchse gemäß III-III in Fig. 2 sowie schließlichFig. 3 is a side view of the resilient socket according to III-III in Fig. 2 and finally
Fig. 4 eine Abwicklung einer solchen federnden BuchseFig. 4 is a settlement of such a resilient socket
Die in Fig. 1 dargestellte federnde Buchse 10 wird mit ihrer in einer Ebene verlaufenden Auflagefläche 11, die in dieser Fig. 1 am rechten Rand liegt, auf eine Ebene aufgesetzt. Kommt eine solche Buchse für ein Einspritzventil an einemThe resilient bushing 10 shown in FIG. 1 is placed on one level with its support surface 11 which runs in one plane and which lies on the right edge in this FIG. 1. If such a socket for an injection valve comes on one
Otto-Motor in Frage, so wird die Buchse 10 mit ihrer ebenen Auflagefläche 11 in eine entsprechende zylindrische Bohrung des Zylinderkopfes eingesetzt. Das in der Fig. 1 links dargestellte andere Ende 12 der federnden Buchse 10 stützt sich an einer zweiten Fläche ab, die im Falle _ines Otto-Motors mit Brennstoffeinspritzung ein sogenanntes „rail" (Kraftstoff-Verteiler-Rohr) darstellen kann. .Otto engine in question, the socket 10 is inserted with its flat bearing surface 11 in a corresponding cylindrical bore of the cylinder head. The other end 12 of the resilient bush 10, shown on the left in FIG. 1, is supported on a second surface which, in the case of an Otto engine with fuel injection, can represent a so-called “rail” (fuel distributor pipe).
Die Fig. 2 läßt erkennen, dass sich der Mantel der federnden Buchse 10 vorzugsweise über einen Umfangswinkel von etwa 270° erstreckt. Es bleibt somit ein Öffnungswinkel von etwa 90° des Umfangs . Dieser Öffnungswinkel ermöglicht einerseits eine relativ hohe Flexibilität der Buchse in Umfangsrich- tung. Sie kann unter entsprechendem Kraftaufwand in gewissem Umfang in ihrem Durchmesser erweitert oder auch verringert werden. Andererseits ermöglicht der Öffnungswinkel den seitlichen Eintritt der Kraftstoff- und Elektroanschlüsse für das Einspritzventil.2 shows that the jacket of the resilient bush 10 preferably extends over a circumferential angle of approximately 270 °. This leaves an opening angle of approximately 90 ° of the circumference. On the one hand, this opening angle enables a relatively high flexibility of the bushing in the circumferential direction. tung. It can be expanded or reduced to a certain extent in its diameter with the appropriate effort. On the other hand, the opening angle enables the fuel and electrical connections for the injection valve to enter from the side.
Die Fig. 3 lässt erkennen, dass sich im oberen Bereich der Buchse ein bogenförmig ausgebildetes Teil als obere Begren- zung eines Fensters 13 befindet. Dieses bogenförmig ausgebildete Teil liegt mit seiner Kuppe 14 am weiter oben erwähnten „rail" des Motors an.3 shows that in the upper area of the socket there is an arcuate part as the upper boundary of a window 13. This curved part rests with its tip 14 on the "rail" of the engine mentioned above.
Die federnde Buchse 10 weist zwei solcher, sich diametral in der y-Achse gegenüberliegender Fenster 13 mit bogenförmigem oberen Abschluss auf .The resilient bushing 10 has two such windows 13, which are diametrically opposite in the y-axis, with an arcuate upper end.
Bei Winkelabweichungen der Anlageflächen in x-Richtung, d.h. bei einem Fehlerwinkel ß, erfolgt ein automatischer Ausgleich durch Abwälzen auf dem oberen balligen Teil des Bogen, d.h. auf der Kuppe 14. Bei einer Winkelabweichung α in der y-Achse ergibt sich ebenfalls ein automatischer Aus- gleich durci. unterschiedlich starke federelastische Auslenkung der beiden Bögen 15.In the event of angular deviations of the contact surfaces in the x direction, i.e. at an error angle ß, an automatic compensation takes place by rolling on the upper spherical part of the arch, i.e. on the crest 14. With an angular deviation α in the y-axis, there is also an automatic compensation by durci. Different elastic deflection of the two arches 15.
Eine solche federnde Buchse 10 kann in äußerst einfacher Weise aus geeignetem Flachmaterial hergestellt werden. Dabei weist der Rohling der Buchse dann zunächst die Gestalt gemäß Fig. 4 auf. Durch an sich bekannte Fertigungsschritte wird aus dem flachen Rohling eine weiter oben beschriebene Buchse 10 mit im wesentlichen kreisrundem Umfang hergestellt. Nach dem Krümmungsvorgang ertreckt sich die federnde Buchse dann - wie weiter oben beschrieben - über einen Umfangswin- kel von etwa 270° .Such a resilient bush 10 can be produced in an extremely simple manner from a suitable flat material. The blank of the bushing then initially has the shape according to FIG. 4. By known manufacturing steps from the flat blank, a socket 10 described above is produced with a substantially circular circumference. After the curving process, the resilient bush then extends - as described above - over a circumferential angle of approximately 270 °.
Die Buchse 10 ist mit nur geringem Fertigungsaufwand herstellbar und ersetzt eine Vielzahl bisher erforderlicher Einzelteile. Insbesondere in der modernen Fließbandtechnik ergeben sich damit erhebliche Vorteile.The socket 10 can be produced with only a small amount of production work and replaces a large number of individual parts which were previously required. This results in considerable advantages, particularly in modern assembly line technology.
Die in der y-Achse liegenden Bögen 15 haben federelastische Eigenschaften. Dadurch können, wie in der Fig. 1 schematisch angedeutet, etwa in der y-Achse liegende Fehlerwinkel α durch leichte Verformungen des einen oder anderen Bogens 15 der Buchse 10 ausgeglichen werden. Die Weichheit und damit die Federwirkung der Bögen 15 kann durch einen zweiten klei- neren Bogen 15a beeinflußt werden.The arcs 15 lying in the y-axis have resilient properties. As a result, as schematically indicated in FIG. 1, error angles α lying approximately in the y-axis can be compensated for by slight deformations of one or the other arc 15 of the bushing 10. The softness and thus the spring action of the arches 15 can be influenced by a second, smaller arch 15a.
Bei einem in Fig. 3 schematisch dargestellten Fehlerwinkel ß kann die an der dortigen Kuppe 14 anliegenden Fläche auf dieser Kuppe 14 abrollen und so ein Ausgleich bei einem Fehlerwinkel ß in x-Richtung erfolgen.In the case of an error angle ß shown schematically in FIG. 3, the surface lying against the crest 14 there can roll on this crest 14 and thus compensation for an error angle ß in the x direction can take place.
Schließlich können auch Korrekturen im wirksamen Durchmesser der Buchse 10 durch elastische Verformungen erfolgen. Eine Verringerung des wirksamen Durchmessers erfolgt durch ein elastisches Zusammendrücken der Buchsenwandung . Bei einem Nachlassen der entsprechenden Kräfte weitet sich der Durchmesser wieder auf. Der in Fig. 4 dargestellte ebene Rohling der Buchse kann in Großserie in einem Arbeitsgang aus Flachmaterial hergestellt werden .Finally, corrections in the effective diameter of the bushing 10 can also be made by elastic deformations. The effective diameter is reduced by elastically compressing the sleeve wall. When the corresponding forces decrease, the diameter widens again. The flat blank of the bushing shown in FIG. 4 can be produced in large series in one operation from flat material.
Insgesamt zeigt die mit geringem Aufwand herstellbare Buchse 10 Eigenschaften, die mit denen eines erheblich aufwendigeren kardanischen Gelenks vergleichbar sind. Overall, the socket 10, which can be produced with little effort, exhibits properties which are comparable to those of a considerably more complex cardan joint.

Claims

P a t e n t a n s p r ü c h e : Patent claims:
1. Federnde Buchse, dadurch gekennzeichnet, dass sie im Grundriss einen nahezu geschlossenen Kreisumfang und in ihrem oberen Bereich an zwei in einer y-Achse diametral gegenüberliegenden Positionen zwei Fenster (13) mit abschließenden, elastisch verformbaren Bögen (15) aufweist.1. Spring bushing, characterized in that it has an almost closed circumference in the plan and in its upper area at two diametrically opposite positions in a y-axis two windows (13) with closing, elastically deformable arches (15).
2. Buchse gemäß Anspruch 1, dadurch gekennzeichnet, dass sich den Bögen (15) jeweils kleinere Bögen (15a) entge- gengesetzter Krümmung unmittelbar anschließen.2. Socket according to claim 1, characterized in that the arcs (15) each have smaller arcs (15a) of opposite curvature.
3. Buchse nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass der größere Bogen (15) an seiner Aussen- seite eine gegenüber dem Umfeld vorspringende und als An- lagepunkt gestaltete Kuppe (14) aufweist.3. Socket according to one of claims 1 or 2, characterized in that the larger bend (15) has on its outside a dome (14) projecting from the surroundings and designed as a contact point.
4. Buchse nach einem der Ansprüche 1 bi_ 3 , dadurch gekennzeichnet, daß sich der Mantel der Buchse über einen Um- fangswinkel von etwa 270° mit einem sich daraus ergeben- den Öffnungswinkel von etwa 90° erstreckt.4. Socket according to one of claims 1 bi_ 3, characterized in that the jacket of the socket extends over a circumferential angle of approximately 270 ° with a resulting opening angle of approximately 90 °.
5. Buchse nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass sie aus Federstahl besteht. Buchse nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die sich im Öffnungsbereich der Buchse (10) ergebenden Kanten gebrochen sind. 5. Socket according to one of claims 1 to 4, characterized in that it consists of spring steel. Socket according to one of claims 1 to 5, characterized in that the edges resulting in the opening region of the socket (10) are broken.
EP00984880A 1999-11-06 2000-11-03 Resilient sleeve, especially for injection valves on otto engines Expired - Lifetime EP1228305B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19953269 1999-11-06
DE19953269A DE19953269C2 (en) 1999-11-06 1999-11-06 Spring bushing, especially for injection valves on Otto engines
PCT/DE2000/003862 WO2001034971A2 (en) 1999-11-06 2000-11-03 Resilient sleeve, especially for injection valves on otto engines

Publications (2)

Publication Number Publication Date
EP1228305A2 true EP1228305A2 (en) 2002-08-07
EP1228305B1 EP1228305B1 (en) 2005-02-09

Family

ID=7928019

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00984880A Expired - Lifetime EP1228305B1 (en) 1999-11-06 2000-11-03 Resilient sleeve, especially for injection valves on otto engines

Country Status (4)

Country Link
EP (1) EP1228305B1 (en)
CN (1) CN1211576C (en)
DE (2) DE19953269C2 (en)
WO (1) WO2001034971A2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004048401A1 (en) * 2004-10-01 2006-04-06 Robert Bosch Gmbh Downholder for a fuel injector and fuel injector
DE102008028371B4 (en) * 2008-06-13 2020-10-08 Schaeffler Technologies AG & Co. KG Tolerance ring
JP2018172972A (en) * 2017-03-31 2018-11-08 本田技研工業株式会社 Mounting structure for fuel injection valve
US11572825B1 (en) 2021-12-29 2023-02-07 Garrett Transportation I Inc. Turbocharger flexible bearing cartridge assembly

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Publication number Priority date Publication date Assignee Title
DE8005988U1 (en) * 1980-05-29 Skf Kugellagerfabriken Gmbh, 8720 Schweinfurt Sliding sleeve
DE7827497U1 (en) * 1978-09-15 1980-03-06 Robert Bosch Gmbh, 7000 Stuttgart HEAT PROTECTION FOR NOZZLES OF INTERNAL COMBUSTION ENGINES
GB8516236D0 (en) * 1985-06-27 1985-07-31 Lucas Ind Plc Clamping device
DE8906082U1 (en) * 1989-05-17 1989-07-13 Siemens AG, 1000 Berlin und 8000 München Optical fiber connector with a guide bushing inserted into a protective sleeve
DE4114643C2 (en) * 1991-05-04 1995-12-21 Schaeffler Waelzlager Kg Rolling bearings, in particular for steering columns
US5363825A (en) * 1993-01-27 1994-11-15 Volkswagen Ag Fuel injection arrangement for an internal combustion engine having a plurality of electric fuel injection valves
DE19518670C2 (en) * 1995-05-20 2003-08-28 Fag Kugelfischer Ag & Co Kg Rolling bearings with integrated elastic element
DE29515488U1 (en) * 1995-09-28 1995-11-30 Volkswagen Ag, 38440 Wolfsburg Support bearing element

Non-Patent Citations (1)

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Title
See references of WO0134971A2 *

Also Published As

Publication number Publication date
DE19953269A1 (en) 2001-06-07
WO2001034971A2 (en) 2001-05-17
WO2001034971A3 (en) 2001-11-29
EP1228305B1 (en) 2005-02-09
DE19953269C2 (en) 2001-12-13
CN1211576C (en) 2005-07-20
CN1387608A (en) 2002-12-25
DE50009505D1 (en) 2005-03-17

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