EP1910717A1 - Two-part oil scraper ring for internal combustion engines - Google Patents

Two-part oil scraper ring for internal combustion engines

Info

Publication number
EP1910717A1
EP1910717A1 EP06761816A EP06761816A EP1910717A1 EP 1910717 A1 EP1910717 A1 EP 1910717A1 EP 06761816 A EP06761816 A EP 06761816A EP 06761816 A EP06761816 A EP 06761816A EP 1910717 A1 EP1910717 A1 EP 1910717A1
Authority
EP
European Patent Office
Prior art keywords
ring
part oil
oil scraper
flanks
height
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.)
Withdrawn
Application number
EP06761816A
Other languages
German (de)
French (fr)
Inventor
Michael Hummel
Alexandros Mizoglou
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.)
Mahle International GmbH
Original Assignee
Mahle International 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 Mahle International GmbH filed Critical Mahle International GmbH
Publication of EP1910717A1 publication Critical patent/EP1910717A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J9/00—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction
    • F16J9/06—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction using separate springs or elastic elements expanding the rings; Springs therefor ; Expansion by wedging
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J9/00—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction
    • F16J9/06—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction using separate springs or elastic elements expanding the rings; Springs therefor ; Expansion by wedging
    • F16J9/064—Rings with a flat annular side rail
    • F16J9/066—Spring expander from sheet metal
    • F16J9/069—Spring expander from sheet metal with a "C"-shaped cross section along the entire circumference

Definitions

  • the invention relates to a two-part oil scraper ring for internal combustion engines, with a U-shaped spreading spring ring provided with axial incisions to form radially outward resilient legs and an annular body provided with parallel flanks and a tread, which is arranged between the resilient legs, in which installed condition only the ring body rests on the cylinder wall.
  • a two-part oil scraper ring with a U-shaped expansion spring ring is known from DE 197 04 754 C1.
  • a single lamella which is arranged between the legs of the spreading spring ring, permits an overall height of the oil control ring of approximately 1.5 mm.
  • this solution has the advantage that a sufficient tangential force is exerted on the lamella by the spreading spring, so that the oil scraper effect can also be regarded as sufficient.
  • a reduction in the overall height to or below 1.5 mm thus leads to an insufficient wiping action, as also described in DE 197 94 754 C2, so that overall heights of this magnitude for three-part rings can no longer be realized.
  • the object of the present invention is to provide a two-part oil scraper ring which, in comparison with oil scraper rings of the generic type, permits a substantially improved oil scraper effect with a further reduced axial overall height.
  • the object is achieved by the features of claim 1.
  • the proposed construction of the oil scraper ring which consists of a U-shaped expansion spring ring with an annular body arranged between its legs, on the one hand advantageously achieves an overall height which is less than that of a two-part oil scraper ring, for example that according to DE 197 04 754 C1.
  • a tangential force is exerted on the ring body by the spreading spring ring used, which is further increased by the fact that a certain design of the contact surface for the spreading spring legs is provided, so that an additional tangential force component is generated on the ring body, which leads to an improved oil wiping effect.
  • the design of the contact surface permits a considerably simplified assembly of the ring body.
  • FIG. 1 is a perspective view of the oil control ring according to the invention.
  • Figure 2 is a perspective sectional view of the oil control ring in a first embodiment.
  • Fig. 3 is a perspective sectional view of the oil control ring in a second embodiment.
  • Fig. 4 is a perspective sectional view of the oil control ring in a third embodiment.
  • an oil scraper ring 10 is formed from an expansion spring ring 1 with a u-shaped cross section, between the radially outward-pointing resilient legs 3 and 4 of which an annular body 7 with a running surface 9 is arranged.
  • the spreading spring ring 1 has slots 2 on its radially inner side, so that the legs 3 and 4 are connected to one another via webs 5 designed as spring ring backs. Through the slots 2, the spread ⁇ spring ring 1 is resilient in the circumferential direction.
  • the ring body 7, which is made of steel or cast iron and which can be designed as a minute nose ring, has flanks 7a and 7b which are oriented parallel to one another.
  • the flanks have a roughness of Rz ⁇ 2 ⁇ m for a steel ring body and of Rz ⁇ 4 ⁇ m for a cast ring body.
  • the ring body 7 has at its radially inner end, ie in the direction of the back of the expansion spring ring 1, an axially upward cutout 11 and an axially downward cutout 11, each with a contact surface 12, in which the legs 3 and 4 support resiliently.
  • the contact surface 12 is aligned parallel to the flanks 7a and 7b, whereby according to a second exemplary embodiment according to FIG. 3 the contact surface 12 extends at an inclination angle ⁇ between 2 ° and 20 ° towards the stack plane.
  • this enables simple assembly of the ring body and on the other hand creates an at least partially additional force component acting radially on the ring body for improved oil wiping.
  • the recesses 12 in the ring body 7 are mirror-symmetrical to one another with the radial center axis as a mirror plane and have a height h a that is greater than the thickness D 1 of one leg of the spreading spring ring 1. This is in contrast to the existing state of the art a nominal height of the oil scraper ring 10 is realized, which is determined exclusively by the height h L of the ring body 7.
  • the legs 3 and 4 of the spreading spring ring 1 are supported in a radial width B of the bearing surface 12, which corresponds to approximately one third of the total radial width of the lamellae, so that adequate guidance is ensured.
  • radially extending oil grooves 6 are introduced on the circumferential side at an angular distance of 20 °, that is to say a total of 18 pieces, through which oil to be stripped from the ring body 7 from the cylinder wall is conveyed to the radially inner side of the spreading spring ring and through which Incisions 2 is transported to the crankshaft-side engine compartment.
  • the cutouts 11 of the ring body 7 are designed such that the side 14 of the ring body facing away from the tread 9 rests against the back of the expansion spring ring 1, as a result of which the radial width B of the contact surface 12 can be increased.
  • the oil to be wiped off the cylinder wall is transported away by the radially extending oil grooves 6 directly via the incisions 6 to the engine compartment on the crankshaft side.
  • the ring body 7 can usually be treated by means of a gas nitriding process (GNS) to form a nitride layer.
  • GFS gas nitriding process
  • a wear coating of the treads 9 can also be applied by a PVD process, for example a CrN coating.
  • the oil scraper ring 10 is inserted with sufficient play in the oil ring groove of a piston, only the ring body being in contact with the cylinder wall in the installed state.
  • the expansion spring ring 1 is stretched to a smaller diameter, in which it is compressed in the circumferential direction, so that the resulting radial spring force presses the ring body 7 against the cylinder wall, the special design of the recess 11 for receiving the legs 3 and 4 of the Spreading spring washers 1 an axial height for a two-part oil control ring can be realized, which is less than 1.5 mm.
  • Di leg thickness h L nominal height of the oil contact ring h A axial height of the recess

Abstract

In the case of a two-part oil scraper ring (10) for internal combustion engines, having a U-shaped expanding-spring ring (1), which is provided with axial indentations (2), for forming radially outwardly aligned resilient limbs (3, 4) which are connected to one another by means of radially inwardly situated webs (5), and having an annular body (7) which is provided with in each case parallel flanks (7a, 7b) and a running face (9), according to the invention, a minimum axial installation height with an improved oil-scraping effect should be obtained in that the flanks (7a, 7b) of the annular body have, in their radially inwardly situated wall region, cut-outs (11) which have a support face (12) for the engagement of the resilient limbs (3, 4) of the expanding-spring ring and are shaped such that the nominal height of the oil scraper ring is determined exclusively by the height of the annular body (7).

Description

Zweiteiliger Ölabstreifring für Verbrennungsmotoren Two-part oil scraper ring for internal combustion engines
Die Erfindung betrifft einen zweiteiligen Ölabstreifring für Verbrennungsmotoren, mit einem u-förmigen mit axialen Einschnitten versehenen Spreizfederring zur Bildung von nach radial außen gerichteten federnden Schenkeln und einem mit jeweils parallelen Flanken und einer Lauffläche versehenen Ringkörper, der zwischen den federnden Schenkeln angeordnet ist, wobei im eingebauten Zustand nur der Ringkörper an der Zylinderwand anliegt.The invention relates to a two-part oil scraper ring for internal combustion engines, with a U-shaped spreading spring ring provided with axial incisions to form radially outward resilient legs and an annular body provided with parallel flanks and a tread, which is arranged between the resilient legs, in which installed condition only the ring body rests on the cylinder wall.
Ein zweiteiliger Ölabstreifring mit einem u-förmigen ausgebildeten Spreizfederring ist aus der DE 197 04 754 C1 bekannt. Eine einzige Lamelle, die zwischen den Schenkeln des Spreizfederrings angeordnet ist, gestattet eine Bauhöhe des Ölabstreifrings von ca. 1 ,5 mm. Gegenüber anderen bekannten zweiteiligen Ölabstreifringen, beispielsweise aus der DE 21 1 1 018 C2, besitzt diese Lösung den Vorteil, dass eine noch ausreichende Tangentialkraft durch die Spreizfeder auf die Lamelle ausgeübt wird, so dass die Ölabstreifwirkung ebenfalls noch als ausreichend zu betrachten ist. Eine Verringerung der Bauhöhe bis oder unter 1 ,5 mm führt damit zu einer ungenügenden Abstreifwirkung, wie ebenfalls in der DE 197 94 754 C2 beschrieben, so dass Bauhöhen in dieser Größenordnung für dreiteilige Ringe somit scheinbar nicht mehr zu realisieren sind.A two-part oil scraper ring with a U-shaped expansion spring ring is known from DE 197 04 754 C1. A single lamella, which is arranged between the legs of the spreading spring ring, permits an overall height of the oil control ring of approximately 1.5 mm. Compared to other known two-part oil scraper rings, for example from DE 21 1 1 018 C2, this solution has the advantage that a sufficient tangential force is exerted on the lamella by the spreading spring, so that the oil scraper effect can also be regarded as sufficient. A reduction in the overall height to or below 1.5 mm thus leads to an insufficient wiping action, as also described in DE 197 94 754 C2, so that overall heights of this magnitude for three-part rings can no longer be realized.
Aufgabe der vorliegenden Erfindung ist es, einen zweiteiligen Ölabstreifring anzugeben, der gegenüber gattungsgemäßen Ölabstreifringen eine wesentlich verbesserte Ölabstreifwirkung bei einer weiteren verringerten axialen Bauhöhe gestattet.The object of the present invention is to provide a two-part oil scraper ring which, in comparison with oil scraper rings of the generic type, permits a substantially improved oil scraper effect with a further reduced axial overall height.
Erfindungsgemäß wird die Aufgabe durch die Merkmale des Anspruchs 1 gelöst. Durch die vorgeschlagene Konstruktion des Ölabstreifrings, der aus einem u-förmi- gen Spreizfederring mit zwischen seinen Schenkeln angeordneten Ringkörper besteht, wird einerseits vorteilhaft eine Bauhöhe erreicht, welche die eines zweiteiligen Ölabstreifrings, beispielsweise der nach DE 197 04 754 C1 , unterschreitet. Andererseits wird durch den verwendeten Spreizfederring auf den Ringkörper eine Tangentialkraft ausgeübt, die noch dadurch vergrößert wird, dass eine bestimmte Gestaltung der Auflagefläche für die Spreizfederschenkel vorgesehen ist, so dass eine zusätzliche tangentiale Kraftkomponente auf den Ringkörper erzeugt wird, welche zu einer verbesserten Ölabstreifwirkung führt. Zudem gestattet die Gestaltung der Auflagefläche eine wesentlich vereinfachte Montage des Ringkörpers.According to the invention the object is achieved by the features of claim 1. The proposed construction of the oil scraper ring, which consists of a U-shaped expansion spring ring with an annular body arranged between its legs, on the one hand advantageously achieves an overall height which is less than that of a two-part oil scraper ring, for example that according to DE 197 04 754 C1. On the other hand, a tangential force is exerted on the ring body by the spreading spring ring used, which is further increased by the fact that a certain design of the contact surface for the spreading spring legs is provided, so that an additional tangential force component is generated on the ring body, which leads to an improved oil wiping effect. In addition, the design of the contact surface permits a considerably simplified assembly of the ring body.
Vorteilhafte Weiterbildungen sind Gegenstand der Unteransprüche.Advantageous further developments are the subject of the dependent claims.
Die Erfindung wird im Folgenden anhand eines Ausführungsbeispiels näher erläutert. Es zeigen:The invention is explained in more detail below using an exemplary embodiment. Show it:
Fig. 1 eine perspektivische Ansicht des erfindungsgemäßen Ölabstreifrings;1 is a perspective view of the oil control ring according to the invention;
Fig. 2 eine perspektivische Schnittdarstellung des Ölabstreifringes in einer ersten Ausführung;Figure 2 is a perspective sectional view of the oil control ring in a first embodiment.
Fig. 3 eine perspektivische Schnittdarstellung des Ölabstreifringes in einer zweiten Ausführung.Fig. 3 is a perspective sectional view of the oil control ring in a second embodiment.
Fig. 4 eine perspektivische Schnittdarstellung des Ölabstreifringes in einer dritten Ausführung.Fig. 4 is a perspective sectional view of the oil control ring in a third embodiment.
Aus der perspektivischen Ansicht nach Figur 1 ist ein erfindungsgemäßer Ölabstreif- ring 10 aus einem Spreizfederring 1 mit u-förmigen Querschnitt gebildet, zwischen dessen nach radial außen gerichtete federnde Schenkel 3 und 4 ein Ringkörper 7 mit einer Lauffläche 9 angeordnet sind. Der Spreizfederring 1 weist an seiner radial inneren Seite Schlitze 2 auf, so dass die Schenkel 3 und 4 über als Federringrücken ausgebildete Stege 5 miteinander verbunden sind. Durch die Schlitze 2 ist der Spreiz¬ federring 1 in Umfangsrichtung federnd gestaltet. Der aus Stahl oder Gusseisen bestehende Ringkörper 7, der als Nasenminutenring ausgeführt sein kann, weist zueinander jeweils parallele ausgerichtete Flanken 7a und 7b auf. Die Flanken besitzen eine Rauheit von Rz < 2μm für einen Stahlringkörper und von Rz < 4μm für einen Gussringkörper. Gemäß Figur 2 und 3 hat der Ring- körper 7 an seinem radial inneren Ende, also in Richtung Rücken des Spreizfederrings 1 , eine nach axial oben gerichtete Aussparung 11 und eine nach axial unten gerichtete Aussparung 11 mit jeweils einer Auflagefläche 12, in welcher die Schenkel 3 und 4 sich federnd abstützen. Nach einem ersten Ausführungsbeispiel ist die Auflagefläche 12 parallel zu den Flanken 7a und 7b ausgerichtet, wobei nach einem zweiten Ausführungsbeispiel gemäß Figur 3 die Auflagefläche 12 zur Stapeleben hin unter einem Neigungswinkel α zwischen 2° bis 20° verläuft. Dadurch wird einerseits eine einfache Montage des Ringkörpers ermöglicht und andererseits eine zumindest teilweise zusätzliche radial auf den Ringkörper einwirkende Kraftkomponente zur verbesserten Ölabstreifung geschaffen.From the perspective view according to FIG. 1, an oil scraper ring 10 according to the invention is formed from an expansion spring ring 1 with a u-shaped cross section, between the radially outward-pointing resilient legs 3 and 4 of which an annular body 7 with a running surface 9 is arranged. The spreading spring ring 1 has slots 2 on its radially inner side, so that the legs 3 and 4 are connected to one another via webs 5 designed as spring ring backs. Through the slots 2, the spread ¬ spring ring 1 is resilient in the circumferential direction. The ring body 7, which is made of steel or cast iron and which can be designed as a minute nose ring, has flanks 7a and 7b which are oriented parallel to one another. The flanks have a roughness of Rz <2μm for a steel ring body and of Rz <4μm for a cast ring body. According to FIGS. 2 and 3, the ring body 7 has at its radially inner end, ie in the direction of the back of the expansion spring ring 1, an axially upward cutout 11 and an axially downward cutout 11, each with a contact surface 12, in which the legs 3 and 4 support resiliently. According to a first exemplary embodiment, the contact surface 12 is aligned parallel to the flanks 7a and 7b, whereby according to a second exemplary embodiment according to FIG. 3 the contact surface 12 extends at an inclination angle α between 2 ° and 20 ° towards the stack plane. On the one hand, this enables simple assembly of the ring body and on the other hand creates an at least partially additional force component acting radially on the ring body for improved oil wiping.
Die Aussparungen 12 in dem Ringkörper 7 sind zueinander spiegelsymmetrisch mit der radialen Mittenachse als Spiegelebene ausgeführt und weisen eine Höhe ha auf, die größer ist, als die Dicke D1 jeweils eines Schenkels des Spreizfederrings 1. Damit ist im Gegensatz zum vorhandenen Stand der Technik eine Nennhöhe des Ölab- streifrings 10 realisiert, die ausschließlich durch die Höhe hL des Ringkörpers 7 bestimmt wird. Die Abstützung der Schenkel 3 und 4 des Spreizfederrings 1 erfolgt in einer radialen Breite B der Auflagefläche 12, die etwa einem Drittel der radialen Gesamtbreite der Lamellen entspricht, so dass eine ausreichende Führung gewährleistet ist. An der unteren Flanke 7a sind umfangsseitig in einem Winkelabstand von 20 °, also in einer Gesamtanzahl von 18 Stück, radial verlaufende Ölnuten 6 eingebracht, durch die von dem Ringkörper 7 von der Zylinderwand abzustreifendes Öl zur radial innen liegenden Seite des Spreizfederrings befördert und durch die Einschnitte 2 zum kurbelwellenseitigen Motorraum abtransportiert wird.The recesses 12 in the ring body 7 are mirror-symmetrical to one another with the radial center axis as a mirror plane and have a height h a that is greater than the thickness D 1 of one leg of the spreading spring ring 1. This is in contrast to the existing state of the art a nominal height of the oil scraper ring 10 is realized, which is determined exclusively by the height h L of the ring body 7. The legs 3 and 4 of the spreading spring ring 1 are supported in a radial width B of the bearing surface 12, which corresponds to approximately one third of the total radial width of the lamellae, so that adequate guidance is ensured. On the lower flank 7a, radially extending oil grooves 6 are introduced on the circumferential side at an angular distance of 20 °, that is to say a total of 18 pieces, through which oil to be stripped from the ring body 7 from the cylinder wall is conveyed to the radially inner side of the spreading spring ring and through which Incisions 2 is transported to the crankshaft-side engine compartment.
Gemäß einem dritten Ausführungsbeispiel des erfindungsgemäßen Ölabstreifrings 10 nach Figur 4 sind die Aussparungen 11 des Ringkörpers 7 derart ausgeführt, dass die der Lauffläche 9 abgewandten Seite 14 des Ringkörpers am Rücken des Spreizfederrings 1 anliegt, wodurch die radiale Breite B der Auflagefläche 12 vergrößert werden kann. Das von der Zylinderwand abzustreifende Öl wird dabei durch die radial verlaufende Ölnuten 6 direkt über die Einschnitte 6 zum kurbelwellenseitigen Motorraum abtransportiert.According to a third exemplary embodiment of the oil scraper ring 10 according to the invention according to FIG. 4, the cutouts 11 of the ring body 7 are designed such that the side 14 of the ring body facing away from the tread 9 rests against the back of the expansion spring ring 1, as a result of which the radial width B of the contact surface 12 can be increased. The oil to be wiped off the cylinder wall is transported away by the radially extending oil grooves 6 directly via the incisions 6 to the engine compartment on the crankshaft side.
Der Ringkörper 7 kann üblicherweise mittels eines Gas-Nitrierprozesses (GNS) zur Bildung einer Nitridschicht behandelt sein. Ebenso kann eine Verschleißbeschichtung der Laufflächen 9 durch ein PVD- Verfahren, beispielsweise eine CrN- Beschichtung, aufgebracht werden.The ring body 7 can usually be treated by means of a gas nitriding process (GNS) to form a nitride layer. A wear coating of the treads 9 can also be applied by a PVD process, for example a CrN coating.
Der Ölabstreifring 10 ist im Einbauzustand mit einem ausreichendem Spiel in der Ölringnut eines Kolbens eingesetzt, wobei im eingebauten Zustand nur der Ringkörper an der Zylinderwand anliegt. Der Spreizfederring 1 wird dabei auf einen kleineren Durchmesser gespannt, in dem er in Umfangsrichtung zusammengedrückt wird, so dass die hierdurch entstehende radiale Federkraft den Ringkörper 7 gegen die Zylinderwand drückt, wobei durch die spezielle Gestaltung der Aussparung 11 zur Aufnahme der Schenkel 3 und 4 des Spreizfederrings 1 eine axiale Bauhöhe für einen zweiteiligen Ölabstreifring realisiert werden kann, die kleiner als 1 ,5mm beträgt. In the installed state, the oil scraper ring 10 is inserted with sufficient play in the oil ring groove of a piston, only the ring body being in contact with the cylinder wall in the installed state. The expansion spring ring 1 is stretched to a smaller diameter, in which it is compressed in the circumferential direction, so that the resulting radial spring force presses the ring body 7 against the cylinder wall, the special design of the recess 11 for receiving the legs 3 and 4 of the Spreading spring washers 1 an axial height for a two-part oil control ring can be realized, which is less than 1.5 mm.
BezugszeichenReference numerals
10 Zweiteiliger Ölabstreifring10 Two-piece oil scraper ring
1 Spreizfederring1 spring washer
2 axiale Einschnitte2 axial incisions
3, 4 Schenkel des Spreizfederrings3, 4 legs of the spring washer
5 Stege5 bridges
6 Ölnut6 oil groove
7 Ringkörper7 ring bodies
7a Ringflanke, axiale Oberseite7a ring flank, axial top side
7b Ringflanke, axiale Unterseite7b ring flank, axial underside
9 Lauffläche9 tread
11 Aussparung11 recess
12 Auflagefläche α Neigungswinkel der Auflagefläche12 contact surface α inclination angle of the contact surface
B radial Breite der AuflageflächeB radial width of the contact surface
Di Schenkeldicke hL Nennhöhe des Ölanstreifrings hA axiale Höhe der Aussparung Di leg thickness h L nominal height of the oil contact ring h A axial height of the recess

Claims

Patentansprϋche Claims
1. Zweiteiliger Ölabstreifring (10) für Verbrennungsmotoren, mit einem u-förmigen mit axialen Einschnitten (2) versehenen Spreizfederring (1) zur Bildung von nach radial außen gerichteten federnden Schenkeln (3, 4) und einem mit jeweils parallelen Flanken (7a, 7b) und einer Lauffläche (9) versehenen Ringkörper (7), der zwischen den federnden Schenkeln des Spreizfederrings angeordnet sind, dadurch gekennzeichnet, dass die Flanken (7a, 7b) des Ringkörpers in seinem radial innenliegenden Wandbereich derart geformte Aussparungen (1 1 ) mit einer Auflagefläche (12) zum Eingriff der federnden Schenkel (3, 4) des Spreizfederrings aufweisen, dass die Nennhöhe des Ölabstreifrings ausschließlich durch die Höhe (hL) des Ringkörpers (7) bestimmt ist.1. Two-part oil scraper ring (10) for internal combustion engines, with a U-shaped expansion spring ring (1) provided with axial incisions (2) to form resilient legs (3, 4) directed radially outwards and one with parallel flanks (7a, 7b ) and a running surface (9) provided ring body (7), which are arranged between the resilient legs of the expansion spring ring, characterized in that the flanks (7a, 7b) of the ring body in its radially inner wall area recesses (1 1) shaped with a Have contact surface (12) for engaging the resilient legs (3, 4) of the spreading spring ring that the nominal height of the oil control ring is determined exclusively by the height (h L ) of the ring body (7).
2. Zweiteiliger Ölabstreifring (10) nach Anspruch 1 , dadurch gekennzeichnet, dass die Aussparungen (11) zur Auflage der federnden Schenkel (3, 4) in den axial äußeren Flanken (7a, 7b ) des Ringkörpers (7) eingebracht sind.2. Two-part oil scraper ring (10) according to claim 1, characterized in that the recesses (11) for supporting the resilient legs (3, 4) in the axially outer flanks (7a, 7b) of the ring body (7) are introduced.
3. Zweiteiliger Ölabstreifring (10) nach Anspruch 1 , dadurch gekennzeichnet, dass die Auflageflächen (12) der Aussparungen (11 ) parallel zu den Ringkörperflanken (7a, 7b) angeordnet sind, dass die radiale Breite (B) der Auflageflächen maximal einem Drittel der radialen Wanddicke des Ölabstreifrings beträgt und dass die axiale Höhe (ha) der Aussparungen mindestens der Dicke (D1) eines einzelnen Schenkels (3, 4) entspricht.3. Two-part oil scraper ring (10) according to claim 1, characterized in that the bearing surfaces (12) of the recesses (11) are arranged parallel to the ring body flanks (7a, 7b), that the radial width (B) of the bearing surfaces is a maximum of one third radial wall thickness of the oil scraper ring and that the axial height (h a ) of the recesses corresponds at least to the thickness (D 1 ) of an individual leg (3, 4).
4. Zweiteiliger Ölabstreifring (10) nach Anspruch 3, dadurch gekennzeichnet, dass die Auflagefläche (12) der Aussparungen (11 ) in der axialen Höhe (ha) nach radial innen zur radialen Mittenachse hin geneigt ausgeführt ist. 4. Two-part oil control ring (10) according to claim 3, characterized in that the bearing surface (12) of the recesses (11) in the axial height (h a ) is designed inclined radially inward to the radial center axis.
5. Zweiteiliger Ölabstreifring (10) nach Anspruch 4, dadurch gekennzeichnet, dass der Neigungswinkel (α) zwischen 2 bis 20° beträgt.5. Two-part oil control ring (10) according to claim 4, characterized in that the angle of inclination (α) is between 2 to 20 °.
6. Zweiteiliger Ölabstreifring (10) nach einem der Ansprüche, dadurch gekennzeichnet, dass der Ringkörper (7) umfangsseitig verteilt über seine gesamte radiale Wanddicke Nuten (6) zum Ölablauf aufweist.6. Two-part oil control ring (10) according to one of the claims, characterized in that the annular body (7) has circumferentially distributed over its entire radial wall thickness grooves (6) for oil drainage.
7. Zweiteiliger Ölabstreifring (10) nach Anspruch 6, dadurch gekennzeichnet, die Nuten (6) in der nach axial unten angeordneten Ringkörperflanke (7b) eingebracht sind.7. Two-part oil control ring (10) according to claim 6, characterized in that the grooves (6) are introduced in the axially downwardly arranged annular body flank (7b).
8. Zweiteiliger Ölabstreifring (10) nach Anspruch 1 , dadurch gekennzeichnet, dass der Ringkörper (7) aus Stahl oder Gusseisen besteht. 8. Two-part oil control ring (10) according to claim 1, characterized in that the ring body (7) consists of steel or cast iron.
EP06761816A 2005-08-06 2006-07-18 Two-part oil scraper ring for internal combustion engines Withdrawn EP1910717A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005037205A DE102005037205A1 (en) 2005-08-06 2005-08-06 Two-piece oil scraper ring for internal combustion engines
PCT/DE2006/001239 WO2007016894A1 (en) 2005-08-06 2006-07-18 Two-part oil scraper ring for internal combustion engines

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EP1910717A1 true EP1910717A1 (en) 2008-04-16

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EP06761816A Withdrawn EP1910717A1 (en) 2005-08-06 2006-07-18 Two-part oil scraper ring for internal combustion engines

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US (1) US20080309022A1 (en)
EP (1) EP1910717A1 (en)
JP (1) JP2009504960A (en)
CN (1) CN101238313A (en)
BR (1) BRPI0614384A2 (en)
DE (1) DE102005037205A1 (en)
WO (1) WO2007016894A1 (en)

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EP2674645A1 (en) * 2012-06-15 2013-12-18 Siemens Aktiengesellschaft Oil blockage ring
DE102017222163A1 (en) 2017-12-07 2019-06-13 Volkswagen Aktiengesellschaft Two-piece oil scraper ring for reciprocating internal combustion engines and reciprocating internal combustion engine with such a oil scraper ring
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RU2750742C1 (en) * 2020-07-09 2021-07-02 Марлен Мелитонович Абрамишвили Gas sealing of cylinder-and piston group of internal combustion engine

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Also Published As

Publication number Publication date
CN101238313A (en) 2008-08-06
DE102005037205A1 (en) 2007-02-08
BRPI0614384A2 (en) 2011-03-22
WO2007016894A1 (en) 2007-02-15
JP2009504960A (en) 2009-02-05
US20080309022A1 (en) 2008-12-18

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