EP0877150B1 - Zweiteilige Ventilschaftdichtung - Google Patents
Zweiteilige Ventilschaftdichtung Download PDFInfo
- Publication number
- EP0877150B1 EP0877150B1 EP97114653A EP97114653A EP0877150B1 EP 0877150 B1 EP0877150 B1 EP 0877150B1 EP 97114653 A EP97114653 A EP 97114653A EP 97114653 A EP97114653 A EP 97114653A EP 0877150 B1 EP0877150 B1 EP 0877150B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sleeve part
- valve
- cylindrical sleeve
- rigid
- stem seal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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
- F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
- F01L3/08—Valves guides; Sealing of valve stem, e.g. sealing by lubricant
Definitions
- the invention is concerned with valve stem seals, particularly with a two-part valve stem seal for Use in an internal combustion engine.
- valve stem seals From US-A-5, 174, 256, US-A-4,947,811, US-A-4,909,202, US-A-3,554,562, US-A-5,558,056 and US-A-3,554,180 are valve stem seals known.
- a valve stem seal has the function (1) Metering of oil for adequate lubrication on the valve stem / Valve guide interface, and (2) minimization of internal oil consumption.
- a valve stem seal assembly includes a rigid sleeve part to attach a sealing body to fix a valve stem guide, the inner diameter of the sleeve part with the outer diameter of the guide cooperates.
- the sleeve part usually registers Sealing element, which is centered around the valve stem, to measure oil, which is the interface between the inner diameter the guide and the valve stem lubricates, but with the in a combustion chamber or an exhaust chamber the amount of oil sucked in should be as small as possible.
- the sealing element can not in suitably sit on the valve stem, resulting in uneven pressures on the cylinder and the valve guide, undesirable signs of wear on the seal or the valve stem and an oil flow that cannot be determined in advance to the valve stem.
- Previous valve stem seals have shown cracks on the Flanges during vehicle operation, as in concentrated Shock waves and internal loads on the flange section the valve stem seal occurred. Previous valve stem seals also caused difficulties with the Provision of a flat flange, as this makes the Risk of crack formation on the flange is increased.
- the invention aims to provide a two-part valve stem seal to provide with improved properties.
- valve stem seal are provided which have better resilience against forces exerted by the valve spring be, and the previous cracks on the flange led.
- a heat-treated metal flange are provided, which prevents the sealing element the arrangement separate from the valve guide can.
- one provided with a flange Valve stem seals are provided, which are not about the valve guide due to the rotational movement of the Valve spring turns. This allows torsional stresses on the spring lip eliminating the Wear is reduced and the service life can be increased.
- this is a valve stem seal assembly provided, which specified in claim 1 is.
- a two-part valve stem seal specified which is a rigid, cylindrical sleeve part includes.
- the valve stem seal also includes a resilient compliant rubber sealing body, which adheres directly is connected to the metal housing.
- the sealing element also has a tight fit in cooperation with the heat-treated metal flange. The sealing element after the invention remains stationary, whereby the wear on the sealing lip can be reduced and the service life can be increased.
- Another advantage of the invention is that that the difficulties with regard to cracking on the flange in the valve stem seal according to the invention let reduce.
- the valve stem seal assembly 10 has a two-part design.
- the two-part design comprises a rigid sleeve part 14, which is preferably made of a metallic material is made, but also from a ceramic Material or any other hard, rigid material can be made.
- the rigid sleeve part 14 is also preferably cylindrical. However, it can any other suitable shape depending on the respective circumstances with the special application forms the valve stem seal assembly.
- the valve stem seal assembly 10 also includes a resilient Sealing body 18, which adheres directly to the rigid, cylindrical sleeve part 14 is connected.
- the rigid, cylindrical sleeve part 14 is in contact with one second, rigid sleeve part 15.
- the second, rigid sleeve part is in contact with one second, rigid sleeve part.
- the second rigid sleeve part 16 is preferably made of a metallic material manufactured, but can also be made of a ceramic material or some other rigid material.
- the second rigid sleeve part 16 is also preferred cylindrical. But it can also be any other suitable shape depending on the particular Conditions for the special application forms of the valve stem seal arrangement to have.
- the resilient sealing body 18 preferably is made of a rubber material. He can also be resilient from any other Made of rubber material or a plastic material which can provide sealing properties.
- at the preferred embodiment of the rigid, cylindrical Sleeve part 14 is a tight fit with the second, rigid Sleeve part 16 provided, but there may also be any other types of connections or adhesive bonds, such as Welding, direct forging, or other types of connection or connecting devices can be used.
- the rigid cylindrical sleeve part 14 includes an inwardly facing End wall 20.
- the rigid, cylindrical sleeve part 14 also includes an outwardly projecting flange 22 one end of the same.
- the rigid, cylindrical sleeve part 14 also includes an outwardly directed gradation 44 an inner surface of the sleeve part 14.
- the resilient sealing body 18 is directly on the End wall 20 of the rigid, cylindrical sleeve part 14 is formed.
- the resilient sealing body 18 can on the end wall 20 may be formed in such a way that it forms the end wall 20 completely surrounds.
- other types of formation can also be used to connect the sealing body 18 with the rigid, cylindrical sleeve part 14 are used. It should be mentioned that other methods, such as a Fixed fit, epoxy resins or other methods can be used which can allow you to have a firm connection between the cylindrical sleeve part 14 and the resilient compliant seal body 18 receives.
- the rubber lining 28 is also on the inner wall of the rigid, cylindrical sleeve part 14 is formed and is in contact with the valve guide 24 when inserted into an engine cylinder head or an engine block 26.
- the rigid, cylindrical Sleeve part 14 has a tight fit with the second, cylindrical Sleeve part 16 and generates a holding force to the Rubber liner 28 in constant contact with the valve guide assembly 24 press.
- the vertical wall 30 of the second, rigid, cylindrical sleeve part 16 prevented any possibility that the sealing element of the valve stem assembly yourself from the valve guide 24 during the Operation of the vehicle can solve.
- the second, rigid sleeve part 16 also offers protection in that the Valve spring 32 before wear in the cylinder head 26 is protected during the operating state.
- the second, cylindrical sleeve part 16 comprises one after internal flange 34.
- the second, cylindrical Sleeve member 16 also includes a metal flange or one Seat 36, which is in direct contact with the engine block head Is 26 and forms the seat for the valve spring 32, so that the valve spring 32 in the cylinder head during vehicle operation is not exposed to wear.
- the second, rigid, cylindrical sleeve part 16 is separate from the first, rigid, cylindrical sleeve portion 14 of the valve stem seal assembly 10 manufactured. This separate manufacturing method allows the occurrence of internal Loads on the second, rigid, cylindrical sleeve part 16 can be reduced.
- the Flange 26 of the second, rigid, cylindrical sleeve part has a flatness that can be specified more precisely, which increases the frequency of crack formation can reduce the flange, this cracking in general a problem with valve stem seals of this type represents.
- the second, rigid, cylindrical sleeve part 16 separate from the first, rigid, cylindrical sleeve part 14 and the sealing body 18th is manufactured, can be made according to the manufacturing processes for the separate parts this to a valve stem seal arrangement 10 put together, which in a vehicle internal combustion engine is used.
- the resilient sealing body 18 also includes one annular sealing lip 38 on the upper part, which is a constant Seal with the valve stem 14 during the vehicle operating condition provides.
- the resilient Seal body 18 also includes a concave recess 42 along the upper part of the resilient sealing body 18.
- the concave recess 42 takes a spring part 12 and holds it in its position, which is the springy compliant, annular sealing lip 38 in constant contact presses against the valve stem 40 during vehicle operation. This spring 12 and the annular sealing lip 38 control the amount of oil between the valve stem 40 and the Valve stem seal assembly 10.
- valve stem seal arrangements were in the operating state forced while working a motor vehicle and their internal combustion engine by the valve spring to turn. As a result, the sealing lip is subjected to torsional stresses exposed as well as axial forces to and fro moving valve stem while working the Internal combustion engine.
- the first, cylindrical, rigid sleeve part 14 of the second, rigid, cylindrical Sleeve part 16 separated, allowing the second, rigid, cylindrical sleeve part 16 with the Valve spring 12 can rotate, but the entire valve stem seal assembly 10 not with the valve spring 12 rotates. This results in the sealing element 18 with respect of the valve stem 40 is stationary, i.e. that it is does not rotate around the valve stem 40.
- valve stem seal assembly 10 is installed as a unit, there is a tight fit between the first, rigid, cylindrical Sleeve part 14 and the second, rigid, cylindrical sleeve part 16 is provided.
- the separation of the first, rigid, cylindrical sleeve part 14 of the second, rigid, cylindrical Sleeve part 16 occurs only during engine operation on, which only enables the second, rigid, cylindrical sleeve part 16 a rotational movement executes while the first, rigid, cylindrical sleeve part 14 and the sealing body 18 stationary around the valve stem 40 stay.
Description
- Fig. 1
- eine Seitenansicht einer Ventilschaftdichtung nach der Erfindung;
- Fig. 2
- eine Schnittansicht der Ventilschaftdichtung längs der Linie 3-3;
- Fig. 3
- eine Schnittansicht der Ventilschaftdichtung: und
- Fig. 4
- eine weitere Schnittansicht der Ventilschaftdichtung im Betriebszustand.
Claims (15)
- Ventilschaftdichtungsanordnung zum Einsatz bei einer Brennkraftmaschine, welche folgendes aufweist:ein erstes, starres, zylindrisches Hülsenteil (14), welches einen radial nach innen verlaufenden Flansch (20) am oberen Ende des Hülsenteils, und einen nach außen verlaufenden Flansch (22) am Bodenende des Hülsenteils (14) hat;ein zweites, starres, zylindrisches Hülsenteil (16), welches einen nach außen verlaufenden Sitz (36) am Bodenende und einen nach innen radial verlaufenden Flansch (34) am anderen Ende hat, wobei das erste, starre, zylindrische Hülsenteil (14) in Kontakt mit einer Innenfläche des zweiten, starren, zylindrischen Hülsenteils (16) ist; undeinen federnd nachgiebigen Dichtungskörper (18), welcher in Kontakt mit dem ersten, starren, zylindrischen Hülsenteil (14) und in konstantem Kontakt mit einem Ventilschaft (40) ist.
- Ventilschaftanordnung nach Anspruch 1, dadurch gekennzeichnet, daß das erste, starre, zylindrische Hülsenteil (14) aus einem metallischen Material hergestellt ist.
- Ventilschaftdichtungsanordnung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das zweite, starre, zylindrische Hülsenteil (16) aus einem metallischen Material hergestellt ist.
- Ventilschaftdichtungsanordnung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der federnd nachgiebige Dichtungskörper (18) aus einem Kautschukmaterial hergestellt ist.
- Ventilschaftdichtungsanordnung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß ferner eine Feder (12) mit einer Umfangsgestalt vorgesehen ist, welche eingesetzt wird, um den federnd nachgiebigen Dichtungskörper (18) in Kontakt mit dem Ventilschaft (40) anzudrücken.
- Ventilschaftdichtungsanordnung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß ferner eine ringförmige Dichtlippe (38) an einem oberen Abschnitt des federnd nachgiebigen Dichtungskörpers (18) vorgesehen ist.
- Ventilschaftdichtungsanordnung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß der federnd nachgiebige Dichtungskörper (18) direkt haftend mit dem ersten, starren, zylindrischen Hülsenteil (14) verbunden ist.
- Ventilschaftdichtungsanordnung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß das erste, zylindrische Hülsenteil (14) und das zweite, zylindrische Hülsenteil (16) mittels eines Festsitzes verbunden sind.
- Ventilschaftdichtungsanordnung nach einem der Ansprüche 1-7 dadurch gekennzeichnet, daß der Festsitz ermöglicht, daß das zweite, zylindrische, starre Hülsenteil (16) sich mit einer Ventilfeder (32) drehen kann, während das erste, starre, zylindrische Hülsenteil (14) bezüglich einer Drehbewegung zu der Ventilfeder (32) stationär ist.
- Ventilschaftdichtungsanordnung nach Anspruch 9, dadurch gekennzeichnet, daß sich das zweite, starre, zylindrische Hülsenteil (16) beim Brennkraftmaschinenbetrieb mit einer Ventilfeder (32) dreht, und daß der federnd nachgiebige Dichtungskörper (18) und das erste, starre, zylindrische Hülsenteil (14) bezüglich der Ventilfeder (32) hinsichtlich einer Drehbewegung stationär sind.
- Ventilschaftdichtungsanordnung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß das erste, starre, zylindrische Hülsenteil (14) in Kontakt mit einer Innenfläche des zweiten, starren, zylindrischen Hülsenteils (16) ist, daß der federnd nachgiebige Dichtungskörper (18) eine ringförmige Dichtlippe (38) am oberen Abschnitt und einen ringförmig erhabenen Abschnitt am Bodenende umfaßt, und daß der federnd nachgiebige Dichtungskörper (18) in konstantem Kontakt mit einer Ventilführung und einem Ventilschaft (40) ist.
- Ventilschaftdichtungsanordnung nach einem der Ansprüche 5 bis 11, dadurch gekennzeichnet, daß die Feder (32) ringförmig ausgebildet ist.
- Ventilschaftdichtungsanordnung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß sich das zweite, zylindrische Hülsenteil (16) unabhängig von dem ersten, zylindrischen Hülsenteil (14) dreht.
- Ventilschaftdichtungsanordnung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß das zweite, zylindrische Hülsenteil (16) einen Sitz für eine Ventilfeder (32) bildet.
- Ventilschaftdichtungsanordnung nach Anspruch 14, dadurch gekennzeichnet, daß das zweite, zylindrische Hülsenteil (16) sich mit der Ventilfeder (32) dreht.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/852,836 US5775284A (en) | 1997-05-07 | 1997-05-07 | Two-piece valve stem seal |
US852836 | 2001-05-10 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0877150A1 EP0877150A1 (de) | 1998-11-11 |
EP0877150B1 true EP0877150B1 (de) | 2002-04-03 |
Family
ID=25314349
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97114653A Expired - Lifetime EP0877150B1 (de) | 1997-05-07 | 1997-08-23 | Zweiteilige Ventilschaftdichtung |
Country Status (6)
Country | Link |
---|---|
US (1) | US5775284A (de) |
EP (1) | EP0877150B1 (de) |
AT (1) | ATE215666T1 (de) |
DE (1) | DE59706866D1 (de) |
DK (1) | DK0877150T3 (de) |
ES (1) | ES2175236T3 (de) |
Families Citing this family (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6450143B1 (en) | 1999-09-14 | 2002-09-17 | Dana Corporation | Heavy-duty valve stem seal assembly |
US6270082B1 (en) | 1999-09-14 | 2001-08-07 | Dana Corporation | Coextruded valve stem seal |
US6209504B1 (en) | 1999-09-14 | 2001-04-03 | Dana Corporation | Heavy-duty valve stem seal |
US6269787B1 (en) * | 1999-12-22 | 2001-08-07 | Dana Corporation | Rocker cover gasket assembly with integral valve stem seals |
US6205969B1 (en) * | 1999-12-22 | 2001-03-27 | Dana Corporation | Multi-seal retainer assembly and method for making the same |
US6516769B2 (en) * | 2001-02-26 | 2003-02-11 | Dana Corporation | Valve seal assembly with dual finger retainer system |
US6527275B2 (en) * | 2001-05-16 | 2003-03-04 | Dana Corporation | Molded rubber jacket with fabric reinforcement for valve stem seal |
US6609700B2 (en) * | 2001-05-31 | 2003-08-26 | Dana Corporation | Valve seal assembly with spring finger retainer |
US6647943B2 (en) | 2001-07-31 | 2003-11-18 | Dana Corporation | Valve stem seal assembly with locator system |
US6848671B2 (en) * | 2001-11-29 | 2005-02-01 | Dana Corporation | Valve spring anti-rotation apparatus |
US6764079B1 (en) * | 2002-04-19 | 2004-07-20 | Dana Corporation | Valve seal assembly with straight-walled retainer |
US6877749B2 (en) * | 2002-11-25 | 2005-04-12 | International Engine Intellectual Property Company, Llc | Seal for use with a movable rod |
US6761141B2 (en) * | 2002-12-10 | 2004-07-13 | Dana Corporation | Valve stem seal with built-in sprue |
DE10325764B3 (de) * | 2003-06-05 | 2005-08-04 | Carl Freudenberg Kg | Ventilschaftabdichtung für Brennkraftmaschinen |
US6901902B1 (en) * | 2004-02-25 | 2005-06-07 | Freudenberg-Nok General Partnership | Two-piece valve stem seal |
US7900932B2 (en) * | 2004-08-03 | 2011-03-08 | Dana Automotive Systems Group, Llc | Valve stem sealing assembly |
DE602005026801D1 (de) * | 2005-08-01 | 2011-04-21 | Corcos Ind S A S Di Externa Italia S R L | Ventilschaftdichtung für eine Brennkraftmaschine |
US7311068B2 (en) | 2006-04-17 | 2007-12-25 | Jason Stewart Jackson | Poppet valve and engine using same |
US7533641B1 (en) | 2006-04-17 | 2009-05-19 | Jason Stewart Jackson | Poppet valve and engine using same |
US9500106B2 (en) * | 2009-05-20 | 2016-11-22 | Freudenberg—NOK General Partnership | Two-piece valve stem seal |
US9416690B2 (en) * | 2009-07-30 | 2016-08-16 | Freudenberg-Nok General Partnership | Reduced inertia valve stem seal flange |
EP2540999B1 (de) * | 2011-06-29 | 2014-07-09 | Caterpillar Motoren GmbH & Co. KG | Ventilschaftdichtung für einen Verbrennungsmotor |
US8601991B2 (en) | 2011-08-02 | 2013-12-10 | Freudenberg-Nok General Partnership | Low profile valve stem seal in cylinder head |
DE102011083743A1 (de) * | 2011-09-29 | 2013-04-04 | Aktiebolaget Skf | Ventilschaftdichtung |
US8893681B2 (en) * | 2013-03-07 | 2014-11-25 | Freudenberg-Nok General Partnership | Pressure support for engine valve stem seals |
ITUA20162719A1 (it) * | 2016-04-19 | 2017-10-19 | Freudenberg Sealing Tech S A S Di Externa Italia S R L U | Guarnizione per una valvola di un motore a combustione interna |
US10746062B2 (en) * | 2018-04-04 | 2020-08-18 | Freudenberg Sealing Technologies S.A.S. Di Externa Italia S.R.L.U. | Gasket with an improved heat dissipation capacity for a valve of an internal combustion engine |
Family Cites Families (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3554562A (en) | 1967-06-21 | 1971-01-12 | Gen Motors Corp | Valve stem seal assembly |
US3480286A (en) * | 1967-08-09 | 1969-11-25 | Victor Mfg & Gasket Co | Valve stem seal |
US3554180A (en) | 1969-03-21 | 1971-01-12 | Gen Motors Corp | Valve stem seal |
US3699942A (en) * | 1971-02-17 | 1972-10-24 | Forest J Moray | Adjustable valve stem oil seals for old and new internal combustion engines |
US3782684A (en) * | 1971-09-20 | 1974-01-01 | Rockwell International Corp | Seat insert for butterfly-type valves |
DE3711436C1 (de) * | 1987-04-04 | 1988-07-21 | Goetze Ag | Montagevorrichtung fuer Ventilschaftabdichtungen |
US4811960A (en) * | 1987-08-10 | 1989-03-14 | Microdot Inc. | Fixed valve stem oil seal |
DE3902518A1 (de) * | 1989-01-28 | 1990-08-02 | Goetze Ag | Ventilschaftabdichtung |
US4947811A (en) * | 1989-06-30 | 1990-08-14 | Dana Corporation | Floating valve stem seal |
US4909202A (en) * | 1989-06-30 | 1990-03-20 | Dana Corporation | Frustoconical valve stem sealing element |
US4928644A (en) * | 1989-07-30 | 1990-05-29 | Travis Gilbert E | Lubrication control |
US5002018A (en) * | 1989-11-07 | 1991-03-26 | Enginetech, Inc. | Umbrella seal for an automobile valve stem |
US5062397A (en) * | 1990-09-07 | 1991-11-05 | Eaton Corporation | Valve stem seal |
US5129624A (en) * | 1990-11-15 | 1992-07-14 | M&Fc Holding Company, Inc. | Valve stem sealing means for prevention of fugitive emissions |
US5110142A (en) * | 1990-11-30 | 1992-05-05 | Macrotech Fluid Sealing, Inc. | Valve stem oil seal |
US5067449A (en) * | 1991-04-12 | 1991-11-26 | Tecumseh Products Company | Fitted crankcase breather valve assembly |
DE4119952A1 (de) * | 1991-06-18 | 1992-12-24 | Goetze Ag | Ventilschaftabdichtung |
US5174256A (en) * | 1991-11-25 | 1992-12-29 | Dana Corporation | Variable guide height valve seal |
US5472216A (en) * | 1994-09-30 | 1995-12-05 | Parker-Hannifin Corporation | Seal ring for valve stem |
IT1276427B1 (it) * | 1995-06-21 | 1997-10-31 | Corcos Ind Spa | Guarnizione di tenuta per una valvola di un motore a combustione interna. |
US5558056A (en) * | 1995-11-14 | 1996-09-24 | Freudenberg-Nok General Partnership | Two-piece valve stem seal |
-
1997
- 1997-05-07 US US08/852,836 patent/US5775284A/en not_active Expired - Lifetime
- 1997-08-23 AT AT97114653T patent/ATE215666T1/de not_active IP Right Cessation
- 1997-08-23 DE DE59706866T patent/DE59706866D1/de not_active Expired - Lifetime
- 1997-08-23 DK DK97114653T patent/DK0877150T3/da active
- 1997-08-23 ES ES97114653T patent/ES2175236T3/es not_active Expired - Lifetime
- 1997-08-23 EP EP97114653A patent/EP0877150B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
ATE215666T1 (de) | 2002-04-15 |
DK0877150T3 (da) | 2002-07-29 |
EP0877150A1 (de) | 1998-11-11 |
ES2175236T3 (es) | 2002-11-16 |
US5775284A (en) | 1998-07-07 |
DE59706866D1 (de) | 2002-05-08 |
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