EP0759519B1 - Segment de piston pour moteur à combustion interne - Google Patents

Segment de piston pour moteur à combustion interne Download PDF

Info

Publication number
EP0759519B1
EP0759519B1 EP96112522A EP96112522A EP0759519B1 EP 0759519 B1 EP0759519 B1 EP 0759519B1 EP 96112522 A EP96112522 A EP 96112522A EP 96112522 A EP96112522 A EP 96112522A EP 0759519 B1 EP0759519 B1 EP 0759519B1
Authority
EP
European Patent Office
Prior art keywords
piston
piston ring
ring
piston according
carbon layer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP96112522A
Other languages
German (de)
English (en)
Other versions
EP0759519A3 (fr
EP0759519A2 (fr
Inventor
Roland Linz
Edgar Martin
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.)
Federal Mogul Nuernberg GmbH
Original Assignee
Federal Mogul Nuernberg 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 Federal Mogul Nuernberg GmbH filed Critical Federal Mogul Nuernberg GmbH
Publication of EP0759519A2 publication Critical patent/EP0759519A2/fr
Publication of EP0759519A3 publication Critical patent/EP0759519A3/fr
Application granted granted Critical
Publication of EP0759519B1 publication Critical patent/EP0759519B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/02—Alloys based on aluminium with silicon as the next major constituent

Definitions

  • the present invention relates to a piston for Internal combustion engines.
  • piston rings which the task between the piston head and cylinder wall to seal the existing gap from the combustion chamber.
  • piston rings which the task between the piston head and cylinder wall to seal the existing gap from the combustion chamber.
  • the piston ring slides as the piston moves up and down on the one hand with its outer peripheral surface in constant resilient system against the cylinder wall, on the other hand slides the piston ring oscillates in its piston ring groove by the tilting movements of the piston, its flanks, i.e. the top and bottom of the piston ring, alternately the upper or lower flank of the piston ring groove issue.
  • From DE-OS 21 56 127 is also an electrolytic Application of sliding layers on a piston ring and one Known cylinder wall, these sliding layers, e.g. Nickel, due to hard suspended particles in their Abrasion resistance can be increased.
  • the particulate Inclusions can be made of silicon carbide or diamond consist.
  • Ring carriers solve the problem of Groove wear in a satisfactory manner and therefore also applied on a large scale.
  • Ring bearers also have a significant disadvantage because of the piston weight is increased and both when casting the Piston as well as in its mechanical processing elaborate manufacturing technology is what overall caused considerable additional costs.
  • Piston ring carrier also occupy a space in the piston head that the Arrangement of cooling channels restricted and not there allows where they would be most wanted, namely in as close as possible to the top ring groove.
  • Ring carrier castings are, for example, reinforcements of the top ring groove by cladding or welding alloys of the groove flanks as well as Flame sprayed applied surface layers. however These processes also prepare large-scale manufacturing Problems and very high costs so that none provide a satisfactory solution.
  • the piston according to the invention is made of a heat-resistant Made of aluminum alloy and has at least one Ring groove with at least one piston ring.
  • the piston ring is at least perpendicular to it Flanks of the main axis with a plasma CVD method applied hard carbon layer coated.
  • the ring groove in which the piston ring is inserted is unbegert.
  • the hard carbon layer provided according to the invention serves primarily as a running layer opposite the groove flanks the piston ring grooves and not necessarily as Running layer compared to that usually made of gray cast iron existing cylinder liner. It can Hard carbon layer also on the outer peripheral surface of the Piston ring are applied, since it does not interfere there, however, there are none in gray cast iron liners significant additional benefits.
  • the reinforcement of the piston ring according to the invention on its Top and its bottom, i.e. on the surfaces with fully touch the flanks of the piston ring groove significant benefits.
  • the hard carbon layer protects namely in the pairing of Piston ring and piston ring groove both the piston ring flanks as the flanks of the grooves in the piston material are also too high Wear, even when used in highly loaded diesel engines.
  • the Piston rings produced according to the invention possible on a Reinforcement of the piston ring grooves, what the Manufacturing costs of the pistons significantly reduced.
  • On a ring carrier insert for the top piston ring groove are therefore waived, which makes it possible for the first time the cooling channel in the piston head in the under thermal Considered proximity to the top ring groove bring. As a result, the operating temperature in the range top ring groove lowered, and thus also effective for Operational safety of the top ring groove contributed.
  • the one provided according to the invention Hard carbon layer also extremely good Dry-running properties.
  • the coating of the piston ring in the plasma CVD process takes place with a doped hard carbon layer, which has the formula a-C: H, where a is an amorphous material designated and C and H carbon and hydrogen as Identify material components.
  • Such a doped, super hard carbon layer is also under the trade name Dynamant (registered trademark) offered and is from the contribution of Dr. Knut Enke "With modified super hard carbon against wear, Corrosion and Friction "known in the yearbook trolleyntechnik Band 45, 1989, from the metal publishing house has appeared. Ion bombardment creates one Carbon modification that is neither pure graphite nor pure Diamond is, but rather between these two Materials.
  • the piston according to the invention is made of a heat-resistant Aluminum alloy is produced, which in claim 1 has specified composition.
  • a heat-resistant Aluminum alloy is produced, which in claim 1 has specified composition.
  • Such an alloy is known from DE 43 26 978 A1.
  • a piston from such Aluminum alloy, which according to the invention with a Combined hard carbon layer coated piston ring will bring decisive advantages.
  • the invention proposed, heat-resistant aluminum alloy for the Piston material is not only in terms of Frictional wear advantageous, but especially in With regard to the striking stress of the Ring groove flanks under the influence of the in the groove oscillating with the motor piston movement in the Ring groove up and down moving piston ring.
  • Other preferred, heat-resistant aluminum alloys are Al-Si-Mg alloys with relatively high levels of heavy metals such as Ni, Cu, Mn and Fe.
  • the Pistons according to the invention are modified so that the Coating the outer peripheral surface with a special Running layer is omitted, but the piston ring on all sides is coated with the hard carbon layer.
  • Such an embodiment is particularly suitable for Pairing with a light metal cylinder liner, i.e. at Cylinder running surfaces made of aluminum alloys, for example. While the usual gray cast iron cylinder liners Piston rings coated with a front running layer should be, the pairing leads one way hard carbon coated piston ring, no other Coating of running layer on the outer peripheral surface also with a light alloy cylinder liner the face of the ring to a satisfactory Glide.
  • nitrided steel rings can be used without any previous end face allocation can be provided.
  • an additional galvanic Chrome coating of the end face can be provided.
  • the Piston ring Preferably takes place before coating with the Hard carbon layer a fine machining, through which the Piston ring is provided with a roughness of ⁇ 1 ⁇ m.
  • a fine machining through which the Piston ring is provided with a roughness of ⁇ 1 ⁇ m.
  • the piston ring is advantageously in this state ready for installation.
  • the layer thickness of the coating of the piston ring with the hard carbon layer has a thickness of at least 2.5 ⁇ m, and preferably 3 ⁇ 0.5 ⁇ m, as particularly favorable proved.
  • Gray cast iron is preferred, especially in tests with steel good results have been achieved.
  • the surface of the piston ring is also preferably below the coating is nitrided.
  • the coating of the outer Circumferential surface of the piston ring can preferably be known Way with chrome, molybdenum, nickel, diamond or similar Materials are made to wear the peripheral tread of the piston ring.
  • the piston according to the invention is preferably also nearby its uppermost ring groove with a cooling channel in the piston head Mistake.
  • a cooling channel in the piston head Mistake.
  • the narrowest Distance between the cooling channel and the bottom of the groove top ring groove is not more than 3 mm.
  • Piston ring blank To manufacture the piston ring, first a Piston ring blank according to known steel processes manufactured and nitrided in its surface.
  • the piston provided according to the invention is made from a cast heat-resistant aluminum alloy as claimed in claim 9 claimed and described in DE 43 26 978 A1. With regard to the alloy composition, this is Publication also on the subject of the disclosure of this Registration made.
  • the Piston rings according to the invention are made in a conventional manner inserted in the piston ring grooves of the piston.
  • Piston rings have been used for pairing above unreinforced grooves in an aluminum piston alloy described, and the claims relate to this Combination of features.
  • the Piston rings in an advantageous manner for pairings in grooves in Iron materials can be used, e.g. with built pistons with a light metal base and a steel top or cast iron.
  • Those produced according to the invention can also be used Piston rings in pairs with grooves in the known Ring carriers are used. You can also go here Extreme loads Extends the service life of the sliding surfaces cause.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Claims (10)

  1. Piston, notamment pour des moteurs diesel, composé d'un alliage en aluminium résistant à la chaleur,
    avec au moins une rainure annulaire de retenue non armée ainsi
    qu'au moins un segment de piston inséré dans la rainure annulaire de retenue et revêtu au moins sur son flanc perpendiculaire par rapport à son axe principal d'une couche de carbone dur dopé appliqué par un procédé de déposition de vapeur chimique au plasma,
       caractérisé en ce que la couche de carbone dur dopé présente la composition suivante :
    a-C H,où a étant un matériau amorphe, C du carbone et H de l'hydrogène,
    et en ce que l'alliage d'aluminium présente la composition suivante : 2 à 6% de cuivre, 2 à 6% de nickel, 11 à 16% de silicium, 0,5 à 2,0% de magnésium, jusqu'à 0,7% de fer, jusqu'à 0,5% de manganèse, de l'aluminium pour le reste.
  2. Piston selon la revendication 1, caractérisé en ce que le segment de piston est revêtu de tous côtés par la couche de carbone dur.
  3. Piston selon l'une quelconque des revendications précédentes, caractérisé en ce que le segment de piston est superfini avant d'être revêtu par la couche de carbone dur, de préférence à une rugosité ≤ 1 µm.
  4. Piston selon l'une quelconque des revendications précédentes, caractérisé en ce que l'épaisseur de la couche du revêtement du segment de piston est au moins de 2,5 µm, de préférence de 3 ± 0,5 µm.
  5. Piston selon l'une quelconque des revendications précédentes, caractérisé en ce que le segment de piston est composé d'acier.
  6. Piston selon au moins l'une quelconque des revendications 1 à 4, caractérisé en ce que le segment de piston est composé de fonte grise.
  7. Piston selon l'une quelconque des revendications précédentes, caractérisé en ce que la surface du segment de piston est nitrifiée sous le revêtement.
  8. Piston selon l'une quelconque des revendications précédentes, caractérisé en ce que la surface circonférentielle extérieure du segment de piston est revêtue d'un ou de plusieurs des matériaux suivants : chrome, molybdène, céramique, bronze, nickel, SiC, TiC, Al2O3, ou diamant.
  9. Piston selon l'une quelconque des revendications précédentes, caractérisé en ce que celui-ci présente, à proximité de sa rainure annulaire de retenue supérieure, un canal de refroidissement dans la tête de piston.
  10. Piston selon la revendication 9, caractérisé en ce que l'écart le plus étroit entre la paroi du canal de refroidissement et la base de la rainure de la rainure annulaire de retenue supérieure, n'est pas supérieur à 3 mm.
EP96112522A 1995-08-18 1996-08-02 Segment de piston pour moteur à combustion interne Expired - Lifetime EP0759519B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19530511A DE19530511C1 (de) 1995-08-18 1995-08-18 Kolben für Verbrennungsmotoren
DE19530511 1995-08-18

Publications (3)

Publication Number Publication Date
EP0759519A2 EP0759519A2 (fr) 1997-02-26
EP0759519A3 EP0759519A3 (fr) 1997-03-12
EP0759519B1 true EP0759519B1 (fr) 2002-10-23

Family

ID=7769865

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96112522A Expired - Lifetime EP0759519B1 (fr) 1995-08-18 1996-08-02 Segment de piston pour moteur à combustion interne

Country Status (2)

Country Link
EP (1) EP0759519B1 (fr)
DE (2) DE19530511C1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7273655B2 (en) 1999-04-09 2007-09-25 Shojiro Miyake Slidably movable member and method of producing same
US7771821B2 (en) 2003-08-21 2010-08-10 Nissan Motor Co., Ltd. Low-friction sliding member and low-friction sliding mechanism using same
US8096205B2 (en) 2003-07-31 2012-01-17 Nissan Motor Co., Ltd. Gear
US8152377B2 (en) 2002-11-06 2012-04-10 Nissan Motor Co., Ltd. Low-friction sliding mechanism
KR20140078746A (ko) * 2012-03-30 2014-06-25 카야바 고교 가부시기가이샤 미끄럼 접촉 부재 및 피스톤 펌프ㆍ모터
US9004465B2 (en) 2010-03-09 2015-04-14 Federal-Mogul Burscheid Gmbh Helical compression spring for an oil scraper ring of a piston in an internal combustion engine and method for coating a helical compression spring

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19720779C1 (de) * 1997-05-17 1998-10-01 Ae Goetze Gmbh Kolbenring aus Gußeisen
JP3355306B2 (ja) * 1997-09-30 2002-12-09 帝国ピストンリング株式会社 ピストンリング
JP3885375B2 (ja) * 1997-09-30 2007-02-21 帝国ピストンリング株式会社 ピストンリング
DE19815484C1 (de) 1998-04-07 1999-09-09 Federal Mogul Burscheid Gmbh Kolbenring für Brennkraftmaschinen
DE10014515C2 (de) * 2000-03-23 2003-03-13 Federal Mogul Burscheid Gmbh Kolbenring mit Verschleißschutzschicht sowie Verschleißschutzschicht für einen Kolbenring
DE10127020B4 (de) * 2001-06-01 2004-07-08 Federal-Mogul Friedberg Gmbh Kolbenring mit einer Oxid-Nitrid-Verbundschicht
EP1479946B1 (fr) * 2003-05-23 2012-12-19 Nissan Motor Co., Ltd. Piston pour un moteur à combustion interne
EP1666573B1 (fr) 2003-08-06 2019-05-15 Nissan Motor Company Limited Mecanisme coulissant a faible frottement et procede de reduction de frottement
JP4973971B2 (ja) 2003-08-08 2012-07-11 日産自動車株式会社 摺動部材
EP1508611B1 (fr) 2003-08-22 2019-04-17 Nissan Motor Co., Ltd. Boîte de vitesse comprenant une composition d`huile de transmission
JP4076169B2 (ja) * 2004-07-06 2008-04-16 株式会社豊田中央研究所 非晶質硬質炭素膜を備えたピストンリング、ピストン、シリンダ、ピストンピン
DE102006043303B4 (de) * 2006-09-14 2016-06-16 Mahle International Gmbh Gleitelement und Verfahren zu seiner Herstellung
DE102011083971A1 (de) * 2011-10-04 2013-04-04 Federal-Mogul Nürnberg GmbH Verfahren zur Herstellung eines Motorbauteils und Motorbauteil
DE102011083972A1 (de) * 2011-10-04 2013-04-04 Federal-Mogul Nürnberg GmbH Verfahren zur Herstellung eines Motorbauteils und Motorbauteil

Family Cites Families (10)

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Publication number Priority date Publication date Assignee Title
DE2156127B2 (de) * 1970-12-12 1973-05-10 Nippon Piston Ring K.K., Tokio Gleitelementpaar wie kolbenring und zylinderwandung
JPS6258050A (ja) * 1985-09-05 1987-03-13 Toyota Motor Corp ピストンリング
DE3623360A1 (de) * 1986-07-11 1988-01-14 Cameron Iron Works Gmbh Einrichtung mit einander benachbarten oberflaechen, zwischen denen hohe druecke und/oder hohe reibungsbeanspruchungen auftreten
DE3741549A1 (de) * 1986-12-09 1988-06-23 Gedib Ingenieurbuero U Innovat Verfahren zum herstellen eines spannfutters, gemaess dem verfahren gefertigtes spannfutter und gleitstueck fuer dieses
JP2687320B2 (ja) * 1990-04-17 1997-12-08 株式会社リケン ピストンリング
JPH05306461A (ja) * 1992-04-28 1993-11-19 Riken Corp 内燃機関の耐摩耗性摺動部材
DE4325520A1 (de) * 1992-08-08 1994-02-10 Nagel Masch Werkzeug Bauteil im Bereich von Arbeitsräumen, wie Verbrennungsräumen, von Kraft- oder Arbeitsmaschinen mit einer Beschichtung
JPH06258050A (ja) * 1993-03-04 1994-09-16 Hitachi Seiki Co Ltd 砥石形状計測装置
DE4326978A1 (de) * 1993-08-11 1995-02-16 Alcan Gmbh Kolben für Brennkraftmaschinen, insbesondere für Dieselmotoren
DE29605666U1 (de) * 1996-03-27 1996-05-30 Volkswagen Ag, 38440 Wolfsburg Bauteil im Bereich von Verbrennungsräumen

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7273655B2 (en) 1999-04-09 2007-09-25 Shojiro Miyake Slidably movable member and method of producing same
US8152377B2 (en) 2002-11-06 2012-04-10 Nissan Motor Co., Ltd. Low-friction sliding mechanism
US8096205B2 (en) 2003-07-31 2012-01-17 Nissan Motor Co., Ltd. Gear
US7771821B2 (en) 2003-08-21 2010-08-10 Nissan Motor Co., Ltd. Low-friction sliding member and low-friction sliding mechanism using same
US9004465B2 (en) 2010-03-09 2015-04-14 Federal-Mogul Burscheid Gmbh Helical compression spring for an oil scraper ring of a piston in an internal combustion engine and method for coating a helical compression spring
KR20140078746A (ko) * 2012-03-30 2014-06-25 카야바 고교 가부시기가이샤 미끄럼 접촉 부재 및 피스톤 펌프ㆍ모터

Also Published As

Publication number Publication date
EP0759519A3 (fr) 1997-03-12
EP0759519A2 (fr) 1997-02-26
DE19530511C1 (de) 1997-02-20
DE59609811D1 (de) 2002-11-28

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