EP0084385B1 - Piston en métal léger - Google Patents

Piston en métal léger Download PDF

Info

Publication number
EP0084385B1
EP0084385B1 EP83200003A EP83200003A EP0084385B1 EP 0084385 B1 EP0084385 B1 EP 0084385B1 EP 83200003 A EP83200003 A EP 83200003A EP 83200003 A EP83200003 A EP 83200003A EP 0084385 B1 EP0084385 B1 EP 0084385B1
Authority
EP
European Patent Office
Prior art keywords
piston
light
light metal
iron
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
EP83200003A
Other languages
German (de)
English (en)
Other versions
EP0084385A1 (fr
Inventor
Wilfried Sander
Klaus Schellmann
Gunder Dr. Essig
Erich Dr. Wacker
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.)
Kolbenschmidt AG
Original Assignee
Kolbenschmidt AG
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6153390&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0084385(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Kolbenschmidt AG filed Critical Kolbenschmidt AG
Publication of EP0084385A1 publication Critical patent/EP0084385A1/fr
Application granted granted Critical
Publication of EP0084385B1 publication Critical patent/EP0084385B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F3/00—Pistons 
    • F02F3/10—Pistons  having surface coverings
    • F02F3/12—Pistons  having surface coverings on piston heads

Definitions

  • the invention relates to a light metal piston for internal combustion engines, in particular for Otto engines, on whose piston crown at least partially and on its top land at least on the portion adjacent to the piston crown, a metal protective layer is applied.
  • the knock in the petrol engine is caused by the fact that the tail gas - that is the proportion of the mixture not yet captured by the combustion - creates thermodynamic and chemical conditions due to the pressure and temperature increase due to the compression movement of the piston and the combustion that has already occurred in part of the charge that lead to a sudden release of the energy contained in the tail gas.
  • Typical pressure vibrations of high frequency acting on the walls of the combustion chamber are measured, which are superimposed on the normal pressure curve.
  • the temperature vibrations that can be measured on the combustion chamber surfaces are significantly higher locally during knocking combustion during the work cycle, without an increase e.g. the mean piston crown temperature can be determined, which recognizably exceeds the temperature increase corresponding to the changed time course of the burn-through function.
  • the iron or nickel layer primarily exerts a shielding effect, in particular by keeping the high-frequency temperature fluctuations and corrosive stress components away from the light metal of the piston body. It is also essential, however, that the iron or nickel layer itself withstands the stresses caused by knocking combustion due to its high strength, its homogeneous structure, the smooth surface and the high adhesive strength on the light metal. The totality of these properties cannot be achieved with other coatings, for example a hard anodized layer of comparable thickness (DE-A 25 07 899) produced by anodic oxidation on the piston head, which cannot prevent damage to the light metal piston due to knocking combustion, although the hard anodized layer does Light metal pistons for diesel engines protect the surface of the piston on the combustion chamber against thermal fatigue.
  • a copper layer applied electrochemically to a light metal piston shows comparatively less damage from knocking combustion than the uncoated piston, but detaches from the piston crown after a short period of operation due to insufficient adhesive strength. It is known from MTZ (Motortechnische Zeitschrift) No. 2/1974 pages 33-41 to electrochemically deposit an iron layer on a light metal piston. This piston is used in unreinforced aluminum cylinders. The iron layer is applied to the piston skirt, which has the task of avoiding contact between the light metal of the cylinder and that of the piston under all circumstances in extreme running conditions. Due to the iron coating on the piston skirt, piston skirt wear is considerably reduced and the tendency to seize between the piston skirt and cylinder is greatly reduced.
  • the top land and ring section are also provided with an iron layer, so that the top land and ring field game can be designed to achieve low oil consumption and gas passage in such a way that tarnishing of the top land on the cylinder wall can be tolerated in the case of strongly deformed cylinders.
  • CH-A-227 662 describes a light metal piston for internal combustion engines which is at least partially covered with a metal protective layer of 0.001 to a few millimeters thick which is alloyed by diffusion onto the base material of the piston.
  • the metal protective layers which are applied by cathode sputtering or by thermal evaporation of the metal in vacuo, consist of any metals or alloys, advantageously of metals of the chromium group, such as chromium, molybdenum, tungsten, the iron group, such as iron, Cobalt, nickel, the copper group such as copper, silver or a platinum metal such as platinum, palladium, rhodium or metals such as tin, lead, aluminum, cadmium, zinc or rare earth metals such as vanadium, tantalum, zirconium individually or in any combination.
  • the piston crown receives a protective layer made of silver, nickel, chrome or copper for better heat dissipation and reflection, whereas layers of copper, nickel, iron or chrome are applied to the piston skirt to improve the running properties, which cause little wear or even a lubricating effect.
  • CH-A-227 662 is therefore based on a different task than the subject of the application, and the solution measures also differ from one another.

Claims (1)

  1. Piston en métal léger pour des moteurs à combustion interne, notamment pour des moteurs à allumage commandé, sur au moins une partie de la tête de piston duquel et sur au moins la partie de la zone de feu adjacente à la tête de piston, qui est déposée, comme couche métallique de protection, une couche de fer ou de nickel de 5 à 30 µm d'épaisseur, déposée par voie électrochimique.
EP83200003A 1982-01-20 1983-01-04 Piston en métal léger Expired - Lifetime EP0084385B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823201498 DE3201498A1 (de) 1982-01-20 1982-01-20 Leichtmetallkolben
DE3201498 1982-01-20

Publications (2)

Publication Number Publication Date
EP0084385A1 EP0084385A1 (fr) 1983-07-27
EP0084385B1 true EP0084385B1 (fr) 1990-11-07

Family

ID=6153390

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83200003A Expired - Lifetime EP0084385B1 (fr) 1982-01-20 1983-01-04 Piston en métal léger

Country Status (2)

Country Link
EP (1) EP0084385B1 (fr)
DE (2) DE3201498A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3304320C1 (de) * 1983-02-09 1988-07-07 M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8900 Augsburg Leichtmetallkolben für - insbesondere schwerölbetriebene - Brennkraftmaschinen
GB2163073B (en) * 1984-08-13 1988-03-02 Ae Plc Treatment of pistons
GB8714287D0 (en) * 1987-06-18 1987-07-22 Ae Plc Pistons
DE10315232A1 (de) * 2003-04-03 2004-10-28 Federal-Mogul Nürnberg GmbH Kolben für einen Verbrennungsmotor und Verfahren zur Herstellung eines Kolbens
JP5998696B2 (ja) * 2012-07-19 2016-09-28 マツダ株式会社 エンジン燃焼室の断熱構造

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1426138A (en) * 1919-01-09 1922-08-15 Aluminum Manufactures Inc Piston
FR600601A (fr) * 1925-06-26 1926-02-11 Ets De Dion Bouton Nouveau piston pour moteur à explosion
GB492345A (en) * 1936-07-03 1938-09-19 Aluminum Colors Inc Improvements in or relating to pistons
CH227662A (de) * 1938-05-03 1943-06-30 Berghaus Bernhard Mit Metallschutzschicht versehener Leichtmetallkolben für Verbrennungskraftmaschinen, sowie Verfahren und Vorrichtung zur Herstellung von Metallschutzschichten an Leichtmetallkolben.
GB510404A (en) * 1938-05-03 1939-08-01 Bernhard Berghaus Improvements in and relating to light metal pistons and coatings therefor
DE2743512A1 (de) * 1977-08-27 1979-03-01 Eugen Stump Fuehrungsring
DE2921952A1 (de) * 1979-05-30 1980-12-04 Volkswagenwerk Ag Aus aluminium oder einer aluminiumlegierung gefertigter kolben fuer eine verbrennungskraftmaschine

Also Published As

Publication number Publication date
DE3381978D1 (de) 1990-12-13
DE3201498A1 (de) 1983-07-28
EP0084385A1 (fr) 1983-07-27

Similar Documents

Publication Publication Date Title
EP0136741B1 (fr) Piston pour moteurs à combustion interne
DE69631700T2 (de) Hubkolben für eine Brennkraftmaschine
DE3008330A1 (de) Fluessigkeitsgekuehlter kolben fuer brennkraftmaschinen
EP0084385B1 (fr) Piston en métal léger
EP1441157B1 (fr) Surface de cylindre
DE1751013A1 (de) Dieselmotorkolben
EP3608532A1 (fr) Piston pour un moteur
DE3301366A1 (de) Kolben fuer brennkraftmaschinen
DE2714776C2 (de) Zylinderkopfdichtung für Verbrennungskraftmaschinen
AT519790A1 (de) Brennkraftmaschine
DE3036792A1 (de) Verbundkolben
DE10146334A1 (de) Kurbelwellenlager für einen Motorblock
EP0215511B1 (fr) Combinaison piston-cylindre pour moteurs à combustion interne
DE60216631T2 (de) Kolben für verbrennungsmotor
EP0977002B1 (fr) Tube de canon muni d'une couche de chrome dur pour réduire l'usure
DE2211690C3 (de) Leichtmetallkolben für Brennkraftmaschinen
DE2513324A1 (de) Leichtmetallkolben fuer viertakt- brennkraftmaschinen
DE10014515C2 (de) Kolbenring mit Verschleißschutzschicht sowie Verschleißschutzschicht für einen Kolbenring
DE3011216C2 (de) Zylinderkopfdichtung für Kolbenbrennkraftmaschinen mit Nebenbrennkammer
EP3201459A1 (fr) Piston, moteur à pistons avec un tel piston et véhicule automobile avec un tel moteur à pistons
DE19510050A1 (de) Leichter, gegossener Kolben für Verbrennungsmotoren
DE102012009029A1 (de) Kolben für einen Verbrennungsmotor
DE2438548A1 (de) Kolben fuer verbrennungskraftmaschinen
DE60022845T2 (de) Verfahren zur Verstärkung eines Brennkraftmaschinenkolbens und verstärkter Kolben nach dem Verfahren
CH671074A5 (fr)

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

Designated state(s): DE FR GB IT SE

17P Request for examination filed

Effective date: 19830829

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: KOLBENSCHMIDT AKTIENGESELLSCHAFT

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT SE

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

Ref country code: SE

Effective date: 19901107

REF Corresponds to:

Ref document number: 3381978

Country of ref document: DE

Date of ref document: 19901213

ET Fr: translation filed
ITF It: translation for a ep patent filed

Owner name: STUDIO JAUMANN

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

Free format text: ORIGINAL CODE: 0009260

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

26 Opposition filed

Opponent name: BAYERISCHE MOTOREN WERKE AG, PATENTABTEILUNG AJ-3,

Effective date: 19910724

26 Opposition filed

Opponent name: ALCAN DEUTSCHLAND GMBH

Effective date: 19910807

Opponent name: BAYERISCHE MOTOREN WERKE AG, PATENTABTEILUNG AJ-3,

Effective date: 19910724

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19921208

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19921216

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19930211

Year of fee payment: 11

PLBM Termination of opposition procedure: date of legal effect published

Free format text: ORIGINAL CODE: 0009276

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

Free format text: STATUS: OPPOSITION PROCEDURE CLOSED

27C Opposition proceedings terminated

Effective date: 19930128

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

Ref country code: GB

Effective date: 19940104

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

Effective date: 19940104

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

Ref country code: FR

Effective date: 19940930

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

Ref country code: DE

Effective date: 19941001

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

APAH Appeal reference modified

Free format text: ORIGINAL CODE: EPIDOSCREFNO