EP0566526A1 - Hydraulic valve tappet cup-like housing for internal combustion engines with overhead camshaft - Google Patents

Hydraulic valve tappet cup-like housing for internal combustion engines with overhead camshaft Download PDF

Info

Publication number
EP0566526A1
EP0566526A1 EP93810217A EP93810217A EP0566526A1 EP 0566526 A1 EP0566526 A1 EP 0566526A1 EP 93810217 A EP93810217 A EP 93810217A EP 93810217 A EP93810217 A EP 93810217A EP 0566526 A1 EP0566526 A1 EP 0566526A1
Authority
EP
European Patent Office
Prior art keywords
wall
cup
bore
shaped housing
base ring
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
EP93810217A
Other languages
German (de)
French (fr)
Other versions
EP0566526B1 (en
Inventor
Erich Herz
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.)
3A Composites International AG
Original Assignee
Alusuisse Lonza Services Ltd
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 Alusuisse Lonza Services Ltd filed Critical Alusuisse Lonza Services Ltd
Publication of EP0566526A1 publication Critical patent/EP0566526A1/en
Application granted granted Critical
Publication of EP0566526B1 publication Critical patent/EP0566526B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/20—Adjusting or compensating clearance
    • F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
    • F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
    • F01L1/245—Hydraulic tappets
    • F01L1/25—Hydraulic tappets between cam and valve stem

Definitions

  • the invention relates to a cup-shaped housing of an automatically hydraulically adjusting valve tappet for internal combustion engines with an overhead camshaft, with a hollow cylindrical wall closed on one side by a floor and a base ring protruding from the floor concentrically to the wall , limited by at least one bore serving as an oil supply channel with the outside of the housing in connection with the oil reservoir.
  • Such a housing is known, for example, from EP-B-0 212 162, where the base ring is designed directly as a guide sleeve for the play compensation element.
  • the ring-shaped oil reservoir is closed off by a ring-shaped disk which is fixed on the one hand to the inner wall of the housing in a liquid-tight manner and on the other hand is sealed against the base ring by means of an O-ring.
  • a hole leads from a circumferential groove in the outer wall of the housing directly into the lower part of the oil reservoir.
  • An insert part is also known from DE-C-34 12 176, in which the guide part for the play compensation element merges at one end into a flange part which is fixed to the inner wall of the housing in a liquid-sealing manner.
  • the inner boundary of the annular oil reservoir forms the guide part and parts of the play compensation element.
  • a base ring is not provided in this variant. The oil is fed into the oil reservoir through a circumferential groove and a longitudinal groove in the outer wall of the housing through a hole directly in the lower part of the oil reservoir.
  • the housings described above are usually made of steel. This has the disadvantage that the entire plunger has a relatively large mass with a correspondingly high susceptibility to wear.
  • the inventor has taken on the task of creating a housing of the type mentioned at the outset, which is characterized by high rigidity and low weight, and the oil supply channel into the oil reservoir can be created in a simple and inexpensive manner in such a way that The amount of air in the oil reservoir can be kept to a minimum in every operating state.
  • the annular oil storage space is divided into chambers by way of reinforcement webs which project radially from the base between the base ring and the wall, and the bore runs in one of the reinforcement webs, at least the reinforcement web leading the bore extending in the direction from the wall to the base ring Direction has a first area with a wall thickness greater than the diameter of the bore and a second area with a wall thickness smaller than the diameter of the bore, so that the bore ending in the second area opens after its exit from the first area into an opening connecting the adjacent chambers.
  • the arrangement of a base ring with reinforcing webs stiffens the housing, which allows a relatively thin-walled design of the housing.
  • the housing part consisting of the base, wall, base ring and reinforcing webs can be manufactured in one piece by extrusion from a high-strength aluminum alloy, in particular an alloy of the AIZnMgCu type.
  • the different wall thicknesses of the reinforcing webs make it possible to vary the position of the oil supply channel over a wide range and to produce chamber connections in a simple manner by means of simple bores that are to be automated.
  • the bore serving for the oil supply is preferably created starting from the wall and running obliquely upwards towards the floor. This ensures that the oil reservoir remains largely filled in every operating state. Bores that serve to merely connect adjacent chambers are closed in the area of the wall, for example by means of a press-in ball.
  • connecting webs which contain a bore serving to supply oil to the oil reservoir have to be designed in the different thickness according to the invention.
  • the connecting webs can also have a uniform wall thickness that is smaller than the bore diameter.
  • Such bores are preferably carried out horizontally and near the ground. Otherwise, connection openings between adjacent chambers are only required if no compensation is possible via the end faces of the reinforcing webs adjacent to the insert.
  • the base ring engages over a hollow cylindrical guide part, which is arranged concentrically to the latter, for a play-compensating element which can be displaced in a sliding-sealing manner, forming an annular gap
  • the guide part being designed as part of the insert part and at one end merging into an annular flange part which, with its outer circumference, adjoins the wall the housing is liquid-tight.
  • the flange part can bear in a known manner with the side of its edge facing the floor against a stepped shoulder in the wall of the housing and held non-positively between this paragraph and an annular bead formed on the other side of its edge by a circumferential groove formed in the outside of the wall be.
  • This embodiment of a housing - with the exception of the actual play compensation element - consists of two simple parts to be manufactured that enable simple and inexpensive assembly. After the housing part has been manufactured as an extruded part, the necessary holes are drilled from outside.
  • the insert which can be made of steel, plastic or an aluminum alloy, is then inserted and the outer circumferential groove is rolled in in a known manner, as a result of which the annular bead is formed and the insert is pressed with this force-fit against the step-shaped heel. In the event that this pressing in does not lead to the desired liquid-tight connection, this can be produced by additional soldering, welding or caulking.
  • the cup base is exposed to heavy wear and tear due to the bulging cams during operation, this can additionally be provided with a coating made of a wear-resistant and / or slidable material.
  • a wear-resistant and / or slidable coating can be applied to the outer wall of the cup housing, which is guided in a liner in the engine block during operation.
  • a cup-shaped housing 10 of an automatically hydraulically adjusting valve tappet for internal combustion engines with an overhead camshaft has a hollow cylindrical wall 12 which is closed at one end by a bottom 14 integral with it.
  • a base ring 16 which is concentric with the wall 12 and integrally formed with the base 14, projects from the inside of the base 14 of the housing 10 and divides the annular space between the base ring 16 and the wall 12 into chambers 20 via radially arranged reinforcing webs 18.
  • the reinforcing webs 18 are also in one piece with the wall 12, bottom 14 and base ring 16.
  • four reinforcement webs 18 are provided, but six or another number of reinforcement webs can also be arranged.
  • An insert 22 is inserted into the housing 10 such that it projects with a hollow cylindrical guide part 24 for a play compensation element (not shown in the drawing) concentrically into the base ring 16 to form an annular gap 26 and with the outer circumference of an annular flange part integrally formed on the guide part 24 28 is fixed in a circumferential groove 30 in the inner surface of the wall 12 of the housing 10.
  • the insert part 22 is installed in the housing 10 in such a way that the flange part 28, with the side of its edge facing the base 14, is supported against a stepped shoulder 32 in the inner surface of the wall 12 and by subsequent rolling in of a circumferential groove 34 in the outer surface of the wall 12 an annular bead 36 is formed in the inner surface of the wall 12, which together with the step-shaped shoulder 32 forms the circumferential groove 30 and in this non-positively encloses the outer circumference of the annular flange part 28 of the insert part 22.
  • the reinforcing webs 18 are configured with different thicknesses in cross-section in the direction extending from the wall 12 of the housing 10 to the base ring 16.
  • the wall thickness of the reinforcing webs 18 is greater in a first region 18a from the wall 12 to approximately the center of the web than in the subsequent region 18b from the center of the web to the base ring 16.
  • a longitudinal groove 38 runs from the circumferential groove 34 in the region of the radial extension of a reinforcing web 18 in the direction of the floor 14, from which a bore 40 serving as an oil supply channel and extending obliquely upwards in the connecting web 18 extends.
  • the diameter d of the bore 40 is smaller than the wall thickness d a of the first region 18a and greater than the wall thickness d b of the second region 18b of the connecting web 18, so that the bore 40 ending within the second region 18b after it emerges from the first Region 18a opens into an opening 42 connecting the adjacent chambers 20 due to the larger bore diameter d than the wall thickness d b of the second region 18b.
  • the connecting webs 18 without an integrated oil supply channel are likewise provided with a bore 40a which runs horizontally in the vicinity of the base 14 and which opens into an opening 42a connecting the adjacent chambers 20.
  • This bore 40a which only serves the connection opening 42a of adjacent chambers 20, is closed in the region of the wall 12 by means of a press-in ball 44.

Abstract

A cup-shaped housing of a hydraulically self-adjusting valve tappet for internal combustion engines with an overhead camshaft has a wall (12) in the form of a hollow cylinder closed at one end by an end (14) and a base ring (16) which projects from the end (14) concentrically to the wall (12) and, together with the wall (12), and an insert (22) fixed fluid tightly on the latter, bounds an annular oil storage space connected to the outside of the housing (10) via at least one hole (40) serving as an oil supply passage. The annular oil supply space is divided into chambers (20) by radially arranged reinforcing webs (18) projecting from the end (14) between the base ring (16) and the wall (12), and the hole (40) runs in one of the reinforcing webs (18), at least the reinforcing web (18) containing the hole (40) having, in a direction from the wall (12) to the base ring (16), a first region (18A) with a wall thickness (da) greater than the diameter (d) of the hole (40) and a second region (18b) with a wall thickness (db) smaller than the diameter (d) of the hole (40), with the result that the hole (40), which ends in the second region (18b), opens, after its emergence from the first region (18a), into an opening (42) which connects the adjacent chambers (20). <IMAGE>

Description

Die Erfindung betrifft ein tassenförmiges Gehäuse eines sich selbsttätig hydraulisch einstellenden Ventilstössels für Brennkraftmaschinen mit obenliegender Nockenwelle, mit einer hohlzylindrischen einseitig durch einen Boden verschlossenen Wandung und einem vom Boden konzentrisch zur Wandung abragenden Sockelring, der mit der Wandung und einem an dieser flüssigkeitsdicht festgelegten Einsatzteil einen ringförmigen, über wenigstens eine als Ölzufuhrkanal dienende Bohrung mit der Aussenseite des Gehäuses in Verbindung stehenden Ölvorratsraum begrenzt.The invention relates to a cup-shaped housing of an automatically hydraulically adjusting valve tappet for internal combustion engines with an overhead camshaft, with a hollow cylindrical wall closed on one side by a floor and a base ring protruding from the floor concentrically to the wall , limited by at least one bore serving as an oil supply channel with the outside of the housing in connection with the oil reservoir.

Ein derartiges Gehäuse ist beispielsweise aus der EP-B-0 212 162 bekannt, wobei dort der Sockelring direkt als Führungshülse für das Spielausgleichselement ausgebildet ist. Der Abschluss des ringförmigen Ölvorratsraumes erfolgt über eine ringförmige Scheibe, die einerseits an der Gehäuseinnenwand flüssigkeitsdicht festgelegt ist und andererseits gegen den Sockelring mittels eines O-Ringes abgedichtet ist. Von einer Umfangsnut in der Gehäuseaussenwand führt eine Bohrung direkt in den unteren Teil des Ölvorratsraumes.Such a housing is known, for example, from EP-B-0 212 162, where the base ring is designed directly as a guide sleeve for the play compensation element. The ring-shaped oil reservoir is closed off by a ring-shaped disk which is fixed on the one hand to the inner wall of the housing in a liquid-tight manner and on the other hand is sealed against the base ring by means of an O-ring. A hole leads from a circumferential groove in the outer wall of the housing directly into the lower part of the oil reservoir.

Aus der DE-C-34 12 176 ist weiterhin ein Einsatzteil bekannt, bei welchem das Führungsteil für das Spielausgleichselement einends in ein Flanschteil übergeht, welches flüssigkeitsdichtend an der Gehäuseinnenwand festgelegt ist. Die innere Begrenzung des ringförmigen Ölvorratsraumes bildet hier das Führungsteil sowie Teile des Spielausgleichselements. Ein Sockelring ist bei dieser Ausführungsvariante nicht vorgesehen. Die Ölzufuhr in den Ölvorratsraum erfolgt über ein Umfangsnut sowie eine Längsnut in der Gehäuseaussenwand durch eine Bohrung direkt in den unteren Teil des Ölvorratsraumes.An insert part is also known from DE-C-34 12 176, in which the guide part for the play compensation element merges at one end into a flange part which is fixed to the inner wall of the housing in a liquid-sealing manner. The inner boundary of the annular oil reservoir forms the guide part and parts of the play compensation element. A base ring is not provided in this variant. The oil is fed into the oil reservoir through a circumferential groove and a longitudinal groove in the outer wall of the housing through a hole directly in the lower part of the oil reservoir.

Die vorstehend beschriebenen Gehäuse werden üblicherweise aus Stahl gefertigt. Dies bringt den Nachteil mit sich, dass der gesamte Stössel eine verhältnismässig grosse Masse mit entsprechend hoher Verschleissanfälligkeit aufweist.The housings described above are usually made of steel. This has the disadvantage that the entire plunger has a relatively large mass with a correspondingly high susceptibility to wear.

In Kenntnis dieses Standes der Technik hat sich der Erfinder die Aufgabe gestellt, ein Gehäuse der eingangs erwähnten Art zu schaffen, welches sich bei geringem Gewicht durch eine hohe Steifigkeit auszeichnet und der Ölzufuhrkanal in den Ölvorratsraum auf einfache und kostengünstige Weise derart angelegt werden kann, dass in jedem Betriebszustand die Luftmenge im Ölvorratsraum minimal gehalten werden kann.Knowing this state of the art, the inventor has taken on the task of creating a housing of the type mentioned at the outset, which is characterized by high rigidity and low weight, and the oil supply channel into the oil reservoir can be created in a simple and inexpensive manner in such a way that The amount of air in the oil reservoir can be kept to a minimum in every operating state.

Zur erfindungsgemässen Lösung der Aufgabe führt, dass der ringförmige Ölvorratsraum über radial angeordnete, vom Boden zwischen Sockelring und Wandung abragende Verstärkungsstege in Kammern unterteilt ist und die Bohrung in einem der Verstärkungsstege verläuft, wobei zumindest der die Bohrung führende Verstärkungssteg in von der Wandung zum Sockelring verlaufender Richtung einen ersten Bereich mit einer zum Durchmesser der Bohrung grösseren Wandstärke und einen zweiten Bereich mit einer zum Durchmesser der Bohrung kleineren Wandstärke aufweist, so dass die im zweiten Bereich endende Bohrung nach deren Austritt aus dem ersten Bereich in eine die benachbarten Kammern verbindende Öffnung mündet.In order to achieve the object according to the invention, the annular oil storage space is divided into chambers by way of reinforcement webs which project radially from the base between the base ring and the wall, and the bore runs in one of the reinforcement webs, at least the reinforcement web leading the bore extending in the direction from the wall to the base ring Direction has a first area with a wall thickness greater than the diameter of the bore and a second area with a wall thickness smaller than the diameter of the bore, so that the bore ending in the second area opens after its exit from the first area into an opening connecting the adjacent chambers.

Durch die Anordnung eines Sockelrings mit Verstärkungsstegen wird eine Versteifung des Gehäuses erzielt, die eine verhältnismässig dünnwandige Ausführung des Gehäuses erlaubt. Zudem kann das aus Boden, Wandung, Sockelring und Verstärkungsstegen bestehende Gehäuseteil einstückig durch Fliesspressen aus einer hochfesten Aluminiumlegierung, insbesondere einer Legierung vom Typ AIZnMgCu, gefertigt werden.The arrangement of a base ring with reinforcing webs stiffens the housing, which allows a relatively thin-walled design of the housing. In addition, the housing part consisting of the base, wall, base ring and reinforcing webs can be manufactured in one piece by extrusion from a high-strength aluminum alloy, in particular an alloy of the AIZnMgCu type.

Die unterschiedliche Wandstärke der Verstärkungsstege ermöglicht es, durch einfache zu automatisierende Bohrungen die Lage des Ölzufuhrkanals in weiten Bereichen zu variieren und auf einfache Weise Kammerverbindungen herzustellen.The different wall thicknesses of the reinforcing webs make it possible to vary the position of the oil supply channel over a wide range and to produce chamber connections in a simple manner by means of simple bores that are to be automated.

Die der Ölzufuhr dienende Bohrung wird bevorzugt von der Wandung ausgehend schräg noch oben gegen den Boden hin verlaufend angelegt. Dadurch wird sichergestellt, dass in jedem Betriebszustand der Ölvorratsraum zum grössten Teil gefüllt bleibt. Bohrungen, die der blossen Verbindungsöffnung benachbarter Kammern dienen, werden im Bereich der Wandung beispielsweise mittels einer Einpresskugel verschlossen.The bore serving for the oil supply is preferably created starting from the wall and running obliquely upwards towards the floor. This ensures that the oil reservoir remains largely filled in every operating state. Bores that serve to merely connect adjacent chambers are closed in the area of the wall, for example by means of a press-in ball.

Es sei hier noch erwähnt, dass grundsätzlich nur Verbindungsstege, die eine der Ölzufuhr in den Ölvorratsraum dienende Bohrung enthalten, in der erfindungsgemäss unterschiedlichen Dicke ausgebildet sein müssen. Für Bohrungen, die der blossen Kammerverbindung dienen, können die Verbindungsstege auch eine einheitliche Wandstärke aufweisen, die kleiner ist als der Bohrungsdurchmesser. Derartige Bohrungen werden bevorzugt horizontal und in Bodennähe ausgeführt. Im übrigen sind Verbindungsöffnungen zwischen benachbarten Kammern nur dann erforderlich, wenn kein Ausgleich über die dem Einsatzteil benachbarten Stirnseiten der Verstärkungsstege möglich ist.It should also be mentioned here that basically only connecting webs which contain a bore serving to supply oil to the oil reservoir have to be designed in the different thickness according to the invention. For bores that serve the mere chamber connection, the connecting webs can also have a uniform wall thickness that is smaller than the bore diameter. Such bores are preferably carried out horizontally and near the ground. Otherwise, connection openings between adjacent chambers are only required if no compensation is possible via the end faces of the reinforcing webs adjacent to the insert.

Bei einer bevorzugten Ausführungsform der Erfindung übergreift der Sockelring ein konzentrisch zu diesem angeordnetes hohlzylindrisches Führungsteil fürein gleitdichtend verschiebbares Spielausgleichselement unter Bildung eines Ringspaltes, wobei das Führungsteil als Teil des Einsatzteils ausgebildet ist und einends in ein kreisringförmiges Flanschteil übergeht, welches mit seinem äusseren Umfang an der Wandung des Gehäuses flüssigkeitsdicht festgelegt ist. Hierbei kann das Flanschteil auf bekannte Weise mit der dem Boden zugewandten Seite seines Randes gegen einen stufenförmigen Absatz in der Wandung des Gehäuses anliegen und zwischen diesem Absatz und einer auf der anderen Seite seines Randes durch eine in die Aussenseite der Wandung eingeformte Umfangsnut gebildeten Ringwulst kraftschlüssig gehalten sein. Diese Ausführungsform eines Gehäuses besteht -- mit Ausnahme des eigentlichen Spielausgleichselements -- aus zwei einfach zu fertigenden Teilen, die einen einfachen und kostengünstigen Zusammenbau ermöglichen. Nach der Fertigung des Gehäuseteils als Fliesspressteil werden die notwendigen Bohrungen von aussen ausgeführt. Anschliessend wird das Einsatzteil, welches aus Stahl, Kunststoff oder einer Aluminiumlegierung gefertigt sein kann, eingesetzt und in bekannter Weise die äussere Umfangsnut eingerollt, wodurch die Ringwulst gebildet und mit dieser das Einsatzteil kraftschlüssig gegen den stufenförmigen Absatz gepresst wird. Für den Fall, dass dieses Einpressen nicht zur gewünschten flüssigkeitsdichten Verbindung führen sollte, kann diese durch zusätzliches Löten, Schweissen oder Verstemmen hergestellt werden.In a preferred embodiment of the invention, the base ring engages over a hollow cylindrical guide part, which is arranged concentrically to the latter, for a play-compensating element which can be displaced in a sliding-sealing manner, forming an annular gap, the guide part being designed as part of the insert part and at one end merging into an annular flange part which, with its outer circumference, adjoins the wall the housing is liquid-tight. In this case, the flange part can bear in a known manner with the side of its edge facing the floor against a stepped shoulder in the wall of the housing and held non-positively between this paragraph and an annular bead formed on the other side of its edge by a circumferential groove formed in the outside of the wall be. This embodiment of a housing - with the exception of the actual play compensation element - consists of two simple parts to be manufactured that enable simple and inexpensive assembly. After the housing part has been manufactured as an extruded part, the necessary holes are drilled from outside. The insert, which can be made of steel, plastic or an aluminum alloy, is then inserted and the outer circumferential groove is rolled in in a known manner, as a result of which the annular bead is formed and the insert is pressed with this force-fit against the step-shaped heel. In the event that this pressing in does not lead to the desired liquid-tight connection, this can be produced by additional soldering, welding or caulking.

Da der Tassenboden im Betrieb durch den auflaufenden Nocken einer starken Verschleissbeanspruchung ausgesetzt ist, kann dieser zusätzlich mit einem Überzug aus einem verschleissfesten und/oder gleitfähigen Werkstoff versehen werden. Ebenso kann auf die Aussenwand des Tassengehäuses, welches im Betrieb in einer Laufbüchse im Motorblock geführt ist, eine verschleissfeste und/oder gleitfähige Beschichtung aufgetragen werden.Since the cup base is exposed to heavy wear and tear due to the bulging cams during operation, this can additionally be provided with a coating made of a wear-resistant and / or slidable material. Likewise, a wear-resistant and / or slidable coating can be applied to the outer wall of the cup housing, which is guided in a liner in the engine block during operation.

Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung eines bevorzugten Ausführungsbeispiels sowie anhand der Zeichnung; diese zeigt in:

  • Fig. 1: einen Längsschnitt durch ein tassenförmiges Gehäuse;
  • Fig. 2: eine teilweise geschnittene Draufsicht auf das Gehäuse von Fig. 1 gemäss Blickrichtung x.
Further advantages, features and details of the invention result from the following description of a preferred exemplary embodiment and from the drawing; this shows in:
  • 1 shows a longitudinal section through a cup-shaped housing;
  • FIG. 2: a partially sectioned top view of the housing from FIG. 1 according to viewing direction x

Ein tassenförmiges Gehäuse 10 eines sich selbsttätig hydraulisch einstellenden Ventilstössels für Brennkraftmaschinen mit obenliegender Nockenwelle weist eine hohlzylindrische Wandung 12 auf, welche einends durch einen mit dieser einstückigen Boden 14 verschlossen ist. Vom Boden 14 des Gehäuses 10 ragt innenseitig ein zur Wandung 12 konzentrischer, mit dem Boden 14 einstückiger Sockelring 16 ab, welcher über radial angeordnete Verstärkungsstege 18 den ringförmigen Raum zwischen Sockelring 16 und Wandung 12 in Kammern 20 unterteilt. Die Verstärkungsstege 18 sind hierbei mit Wandung 12, Boden 14 und Sockelring 16 ebenfalls einstückig. In der dargestellten Ausführungsvariante eines Gehäuses 10 sind vier Verstärkungsstege 18 vorgesehen, jedoch können auch sechs oder eine andere Anzahl von Verstärkungsstegen angeordnet sein.A cup-shaped housing 10 of an automatically hydraulically adjusting valve tappet for internal combustion engines with an overhead camshaft has a hollow cylindrical wall 12 which is closed at one end by a bottom 14 integral with it. A base ring 16, which is concentric with the wall 12 and integrally formed with the base 14, projects from the inside of the base 14 of the housing 10 and divides the annular space between the base ring 16 and the wall 12 into chambers 20 via radially arranged reinforcing webs 18. The reinforcing webs 18 are also in one piece with the wall 12, bottom 14 and base ring 16. In the illustrated embodiment variant of a housing 10, four reinforcement webs 18 are provided, but six or another number of reinforcement webs can also be arranged.

In das Gehäuse 10 ist ein Einsatzteil 22 derart eingesetzt, dass es mit einem hohlzylindrischen Führungsteil 24 für ein in der Zeichnung nicht dargestellte Spielausgleichselement unter Bildung eines Ringspaltes 26 konzentrisch in den Sockelring 16 einragt und mit dem äusseren Umfang eines einends am Führungsteil 24 angeformten kreisringförmigen Flanschteils 28 in einer Umfangsrille 30 in der Innenfläche der Wandung 12 des Gehäuses 10 festgelegt ist. Der Einbau des Einsatzteils 22 in das Gehäuse 10 erfolgt derart, dass sich das Flanschteil 28 mit der dem Boden 14 zugewandten Seite seines Randes gegen einen stufenförmigen Absatz 32 in der Innenfläche der Wandung 12 abstützt und durch anschliessendes Einrollen einer Umfangsnut 34 in der Aussenfläche der Wandung 12 eine Ringwulst 36 in der Innenfläche der Wandung 12 ausgeformt wird, die zusammen mit dem stufenförmigen Absatz 32 die Umfangsrille 30 bildet und in dieser den äusseren Umfang des kreisringförmigen Flanschteils 28 des Einsatzteils 22 kraftschlüssig umschliesst.An insert 22 is inserted into the housing 10 such that it projects with a hollow cylindrical guide part 24 for a play compensation element (not shown in the drawing) concentrically into the base ring 16 to form an annular gap 26 and with the outer circumference of an annular flange part integrally formed on the guide part 24 28 is fixed in a circumferential groove 30 in the inner surface of the wall 12 of the housing 10. The insert part 22 is installed in the housing 10 in such a way that the flange part 28, with the side of its edge facing the base 14, is supported against a stepped shoulder 32 in the inner surface of the wall 12 and by subsequent rolling in of a circumferential groove 34 in the outer surface of the wall 12 an annular bead 36 is formed in the inner surface of the wall 12, which together with the step-shaped shoulder 32 forms the circumferential groove 30 and in this non-positively encloses the outer circumference of the annular flange part 28 of the insert part 22.

Die Verstärkungsstege 18 sind in von der Wandung 12 des Gehäuses 10 zum Sockelring 16 verlaufender Richtung querschnittlich unterschiedlich dick ausgestaltet. Hierbei ist die Wandstärke der Verstärkungsstege 18 in einem ersten Bereich 18a von der Wandung 12 bis etwa zur Stegmitte grösser als im nachfolgenden Bereich 18b von der Stegmitte zum Sockelring 16.The reinforcing webs 18 are configured with different thicknesses in cross-section in the direction extending from the wall 12 of the housing 10 to the base ring 16. Here, the wall thickness of the reinforcing webs 18 is greater in a first region 18a from the wall 12 to approximately the center of the web than in the subsequent region 18b from the center of the web to the base ring 16.

Von der Umfangsnut 34 verläuft im Bereich der radialen Verlängerung eines Verstärkungssteges 18 in Richtung auf den Boden 14 eine Längsnut 38, von welcher eine als Ölzufuhrkanal dienende, im Verbindungssteg 18 schräg nach oben verlaufende Bohrung 40 ausgeht. Der Durchmesser d der Bohrung 40 ist hierbei kleiner als die Wandstärke da des ersten Bereichs 18a und grösser als die Wandstärke db des zweiten Bereichs 18b des Verbindungssteges 18, so dass die innerhalb des zweiten Bereichs 18b endende Bohrung 40 nach deren Austritt aus dem ersten Bereich 18a infolge des gegenüber der Wandstärke db des zweiten Bereichs 18b grösseren Bohrungsdurchmessers d in eine die benachbarten Kammern 20 verbindende Öffnung 42 mündet.A longitudinal groove 38 runs from the circumferential groove 34 in the region of the radial extension of a reinforcing web 18 in the direction of the floor 14, from which a bore 40 serving as an oil supply channel and extending obliquely upwards in the connecting web 18 extends. The diameter d of the bore 40 is smaller than the wall thickness d a of the first region 18a and greater than the wall thickness d b of the second region 18b of the connecting web 18, so that the bore 40 ending within the second region 18b after it emerges from the first Region 18a opens into an opening 42 connecting the adjacent chambers 20 due to the larger bore diameter d than the wall thickness d b of the second region 18b.

Die Verbindungsstege 18 ohne integrierten Ölzufuhrkanal sind in gleicher Weise mit einer in der Nähe des Bodens 14 horizontal verlaufenden Bohrung 40a versehen, die in eine die benachbarten Kammern 20 verbindende Öffnung 42a mündet. Diese Bohrung 40a, die nur der Verbindungsöffnung 42a benachbarter Kammern 20 dient, ist im Bereich der Wandung 12 mittels einer Einpresskugel 44 verschlossen.The connecting webs 18 without an integrated oil supply channel are likewise provided with a bore 40a which runs horizontally in the vicinity of the base 14 and which opens into an opening 42a connecting the adjacent chambers 20. This bore 40a, which only serves the connection opening 42a of adjacent chambers 20, is closed in the region of the wall 12 by means of a press-in ball 44.

Claims (9)

1. Tassenförmiges Gehäuse eines sich selbsttätig hydraulisch einstellenden Ventilstössels für Brennkraftmaschinen mit obenliegender Nockenwelle, mit einer hohlzylindrischen einseitig durch einen Boden (14) verschlossenen Wandung (12) und einem vom Boden (14) konzentrisch zur Wandung (12) abragenden Sockelring (16), der mit der Wandung (12) und einem an dieser flüssigkeitsdicht festgelegten Einsatzteil (22) einen ringförmigen, über wenigstens eine als Ölzufuhrkanal dienende Bohrung (40) mit der Aussenseite des Gehäuses (10) in Verbindung stehenden Ölvorratsraum begrenzt,
dadurch gekennzeichnet,
dass der ringförmige Ölvorratsraum über radial angeordnete, vom Boden (14) zwischen Sockelring (16) und Wandung (12) abragende Verstärkungsstege (18) in Kammern (20) unterteilt ist und die Bohrung (40) in einem der Verstärkungsstege (18) verläuft, wobei zumindest der die Bohrung (40) führende Verstärkungssteg (18) in von der Wandung (12) zum Sockelring (16) verlaufender Richtung einen ersten Bereich (18a) mit einer zum Durchmesser (d) der Bohrung (40) grösseren Wandstärke (da) und einen zweiten Bereich (18b) mit einer zum Durchmesser (d) der Bohrung (40) kleineren Wandstärke (db) aufweist, so dass die im zweiten Bereich (18b) endende Bohrung (40) nach deren Austritt aus dem ersten Bereich (18a) in eine die benachbarten Kammern (20) verbindende Öffnung (42) mündet.1. cup-shaped housing of an automatically hydraulically adjusting valve tappet for internal combustion engines with an overhead camshaft, with a hollow cylindrical wall (12) closed on one side by a base (14) and a base ring (16) projecting concentrically from the base (14) to the wall (12), with the wall (12) and an insert part fixed to it in a liquid-tight manner (22) delimits an annular oil reservoir, which is connected to the outside of the housing (10) via at least one bore (40) serving as an oil feed channel,
characterized,
that the annular oil storage space is divided into chambers (20) via radially arranged reinforcement webs (18) projecting from the base (14) between the base ring (16) and the wall (12) and the bore (40) runs in one of the reinforcement webs (18), wherein at least the reinforcing web (18) leading the bore (40) in the direction running from the wall (12) to the base ring (16) has a first region (18a) with a wall thickness (d a. ) larger than the diameter (d) of the bore (40) ) and a second area (18b) with a wall thickness (d b ) smaller than the diameter (d) of the bore (40), so that the bore (40) ending in the second area (18b) after it emerges from the first area ( 18a) opens into an opening (42) connecting the adjacent chambers (20). 2. Tassenförmiges Gehäuse nach Anspruch 1, dadurch gekennzeichnet, dass die der Ölzufuhr dienende Bohrung (40) von der Wandung (12) ausgehend schräg noch oben gegen den Boden (14) hin verläuft.2. Cup-shaped housing according to claim 1, characterized in that the oil supply bore (40) starting from the wall (12) extends obliquely upwards towards the bottom (14). 3. Tassenförmiges Gehäuse nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der blossen Verbindungsöffnung (42a) benachbarter Kammern (20) dienende Bohrungen (40a) im Bereich der Wandung (12) insbesondere mit einer Einpresskugel (44) verschlossen sind.3. Cup-shaped housing according to claim 1 or 2, characterized in that the bare connecting opening (42a) of adjacent chambers (20) serving bores (40a) in the region of the wall (12) are closed in particular with a press-in ball (44). 4. Tassenförmiges Gehäuse nach Anspruch 3, dadurch gekennzeichnet, dass die Bohrungen (40a) horizontal in der Nähe des Bodens (14) angeordnet sind.4. Cup-shaped housing according to claim 3, characterized in that the bores (40a) are arranged horizontally in the vicinity of the bottom (14). 5. Tassenförmiges Gehäuse nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der Sockelring (16) ein konzentrisch zu diesem angeordnetes hohlzylindrisches Führungsteil (24) für ein gleitdichtend verschiebbares Spielausgleichselement unter Bildung eines Ringspaltes (26) übergreift, wobei das Führungsteil (24) als Teil des Einsatzteils (22) ausgebildet ist und einends in ein kreisringförmiges Flanschteil (28) übergeht, welches mit seinem äusseren Umfang an der Wandung (12) flüssigkeitsdicht festgelegt ist.5. cup-shaped housing according to one of claims 1 to 4, characterized in that the base ring (16) over a concentrically arranged to this hollow cylindrical guide part (24) for a sliding seal displaceable play compensation element overlaps to form an annular gap (26), wherein the guide part (24 ) is designed as part of the insert part (22) and at one end merges into an annular flange part (28) which is fixed to the wall (12) in a liquid-tight manner with its outer circumference. 6. Tassenförmiges Gehäuse nach Anspruch 5, dadurch gekennzeichnet, dass das Flanschteil (28) mit der dem Boden (14) zugewandten Seite seines Randes einem stufenförmigen Absatz (32) in der Wandung (12) des Gehäuses (10) anliegt und zwischen diesem Absatz (32) und einer auf der anderen Seite seines Randes durch eine in die Aussenseite der Wandung (12) eingeformte Umfangsnut (34) gebildeten Ringwulst (36) kraftschlüssig gehalten ist.6. cup-shaped housing according to claim 5, characterized in that the flange part (28) with the bottom (14) facing side of its edge abuts a step-shaped shoulder (32) in the wall (12) of the housing (10) and between this paragraph (32) and an annular bead (36) formed on the other side of its edge by a circumferential groove (34) formed in the outside of the wall (12) is held in a force-locking manner. 7. Tassenförmiges Gehäuse nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass Boden (14), Wandung (12), Sockelring (16) und Verbindungsstege (18) einstückig als Fliesspressteil aus einer hochfesten Aluminiumlegierung, insbesondere einer Legierung vom Typ AIZnMgCu, gefertigt ist.7. cup-shaped housing according to one of claims 1 to 6, characterized in that the bottom (14), wall (12), base ring (16) and connecting webs (18) in one piece as an extruded part made of a high-strength aluminum alloy, in particular an alloy of the type AIZnMgCu, is made. 8. Tassenförmiges Gehäuse nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass das Einsatzteil (22) aus Stahl, Kunststoff oder einer Aluminiumlegierung gefertigt ist.8. Cup-shaped housing according to one of claims 1 to 7, characterized in that the insert part (22) is made of steel, plastic or an aluminum alloy. 9. Tassenförmiges Gehäuse nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass die äussere Oberfläche des Bodens (14) und/oder der Wandung (12) des Gehäuses (10) mit einem Überzug aus einem verschleissfesten und/oder gleitfähigen Werkstoff versehen ist.9. cup-shaped housing according to one of claims 1 to 8, characterized in that the outer surface of the bottom (14) and / or the wall (12) of the housing (10) is provided with a coating of a wear-resistant and / or slidable material .
EP19930810217 1992-04-14 1993-03-25 Hydraulic valve tappet cup-like housing for internal combustion engines with overhead camshaft Expired - Lifetime EP0566526B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH124092 1992-04-14
CH1240/92 1992-04-14

Publications (2)

Publication Number Publication Date
EP0566526A1 true EP0566526A1 (en) 1993-10-20
EP0566526B1 EP0566526B1 (en) 1995-06-28

Family

ID=4205758

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19930810217 Expired - Lifetime EP0566526B1 (en) 1992-04-14 1993-03-25 Hydraulic valve tappet cup-like housing for internal combustion engines with overhead camshaft

Country Status (3)

Country Link
EP (1) EP0566526B1 (en)
DE (1) DE59300299D1 (en)
ES (1) ES2074385T3 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0272423A1 (en) * 1986-11-22 1988-06-29 INA Wälzlager Schaeffler KG Self-adjusting hydraulic valve tappet
EP0396288A1 (en) * 1989-04-20 1990-11-07 Eaton Engine Lifters Spa Hydraulic tappet
EP0405156A1 (en) * 1989-06-24 1991-01-02 GMB GIESSEREI &amp; MASCHINENBAU BODAN AG Cup-shaped valve tappet

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0272423A1 (en) * 1986-11-22 1988-06-29 INA Wälzlager Schaeffler KG Self-adjusting hydraulic valve tappet
EP0396288A1 (en) * 1989-04-20 1990-11-07 Eaton Engine Lifters Spa Hydraulic tappet
EP0405156A1 (en) * 1989-06-24 1991-01-02 GMB GIESSEREI &amp; MASCHINENBAU BODAN AG Cup-shaped valve tappet

Also Published As

Publication number Publication date
DE59300299D1 (en) 1995-08-03
ES2074385T3 (en) 1995-09-01
EP0566526B1 (en) 1995-06-28

Similar Documents

Publication Publication Date Title
EP0991867B1 (en) Hydraulic valve, especially for controlling a camshaft movement in an automobile
DE3518721C3 (en) Oil-cooled, multi-part plunger of an internal combustion engine
DE4019766C2 (en)
EP1339966B1 (en) Injection nozzle comprising two separately controllable nozzle needles
DE3534536C2 (en)
DE2621348A1 (en) DEVICE FOR OIL OILING CYLINDER LINES FOR COMBUSTION MACHINES
DE10247218A1 (en) Piston assembling method involves connecting first baffle plate between inner and outer annular walls, such that inner surfaces of inner and outer annular wall define closed cooling gallery
DE3642524C1 (en) Device for controlling the oil supply in a control chamber of a piston with variable compression height
DE4015708C1 (en) Hydraulic IC engine chain tensioner - has liq. outlet limiting closure of sintered metal with incorporated throttling passages
DE3502644A1 (en) OIL-COOLED, MULTI-PIECE SUBMERSIBLE PISTON FOR PISTON PISTON COMBUSTION ENGINES
DE3412175A1 (en) CUP-SHAPED HOUSING OF A SELF-ACTUATING HYDRAULICALLY ADJUSTING VALVE TOLDER FOR INTERNAL COMBUSTION ENGINES WITH OVERHEAD CAMSHAFT
DE3409235C2 (en)
DE3722435A1 (en) LUBRICATION DEVICE FOR AN INTERNAL COMBUSTION ENGINE
EP0335121A1 (en) Automatic hydraulically adjusting valve lifter
DE10322595B4 (en) Piston pump, and process for its preparation
EP0566526B1 (en) Hydraulic valve tappet cup-like housing for internal combustion engines with overhead camshaft
EP0272423A1 (en) Self-adjusting hydraulic valve tappet
DE102004027974A1 (en) A built piston and method of preventing damage in contact surfaces of the top and bottom of the piston
DE19942983B4 (en) Hydraulic clearance compensation element
DE3409236A1 (en) External guide part for a valve tappet
DE4401011C2 (en) Built camshaft
DE102005003552B4 (en) Crosshead engine
DE4338571C2 (en) Pistons for an internal combustion engine
DE102009018981A1 (en) Piston for internal combustion engine, has hub for bearing gudgeon pin and piston skirt and spaced from piston skirt by recesses of piston skirt, where piston skirt is formed by two circular cylinder segments
DE3602576A1 (en) Trunk piston, particularly for internal combustion engines, with a connecting rod fixedly attached to the suction pin

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): CH DE ES FR GB IT LI SE

17P Request for examination filed

Effective date: 19940303

17Q First examination report despatched

Effective date: 19940819

ITF It: translation for a ep patent filed

Owner name: DE DOMINICIS & MAYER S.R.L.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE ES FR GB IT LI SE

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19950630

REF Corresponds to:

Ref document number: 59300299

Country of ref document: DE

Date of ref document: 19950803

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2074385

Country of ref document: ES

Kind code of ref document: T3

ET Fr: translation filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19960326

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19960326

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19960331

Ref country code: CH

Effective date: 19960331

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19961129

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19961203

EUG Se: european patent has lapsed

Ref document number: 93810217.5

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19970325

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19970325

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20030203

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050325