WO2014107780A1 - Segment de piston pour moteurs à combustion interne et procédé de fabrication de segment de piston - Google Patents

Segment de piston pour moteurs à combustion interne et procédé de fabrication de segment de piston Download PDF

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Publication number
WO2014107780A1
WO2014107780A1 PCT/BR2014/000001 BR2014000001W WO2014107780A1 WO 2014107780 A1 WO2014107780 A1 WO 2014107780A1 BR 2014000001 W BR2014000001 W BR 2014000001W WO 2014107780 A1 WO2014107780 A1 WO 2014107780A1
Authority
WO
WIPO (PCT)
Prior art keywords
piston ring
defining
coating layer
undercut portion
repellent film
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.)
Ceased
Application number
PCT/BR2014/000001
Other languages
English (en)
Portuguese (pt)
Inventor
Davi Antônio DA SILVA
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 Metal Leve SA
Mahle International GmbH
Original Assignee
Mahle Metal Leve SA
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 Metal Leve SA, Mahle International GmbH filed Critical Mahle Metal Leve SA
Priority to DE112014000402.2T priority Critical patent/DE112014000402T5/de
Publication of WO2014107780A1 publication Critical patent/WO2014107780A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • F16J9/26—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction characterised by the use of particular materials

Definitions

  • the present invention relates to a piston ring for use in internal combustion engines provided with a coating on only part of its outer side surface such that at least the lower portion of the ring (i.e. the one facing the crankshaft side) does not receive any type of coating analogous to that applied to the rest.
  • the present invention further relates to a process of manufacturing such a piston ring.
  • Internal combustion engines with reciprocating pistons such as engines operating according to the Otto and Diesel cycles, have at least two rings arranged concentrically to the piston (s) to ensure a sealing of the combustion chamber, ensuring burning of the air / fuel mixture and avoiding unwanted burning of lubricating oil.
  • three rings are used, the compression ring (closest to the combustion chamber, ie the upper portion of the cylinder), the second channel ring and the oil scraper ring.
  • the compression ring which is the object of the present invention, has the primary function of preventing leakage of the air / fuel mixture out of the combustion chamber, which tends to occur mainly in the compression and explosion times of the engine.
  • This coating has hardness and toughness properties that, concomitantly, seek to guarantee the ring durability and elasticity under the most varied engine operating situations.
  • this prior art document relates to a piston ring whose sliding surface profile comprises a coating applied by physical vapor deposition.
  • the sliding surface is provided with a protruding portion which, like the rest, receives the application of said coating. It happens that the protruding portion is higher than that of the applied coating layer and, after application of the coating, it is removed until the height of the region it occupied is the same as the rest of the lateral portion of the ring including the applied coating.
  • the present invention is directed to a piston ring, ideally It is intended for use in internal combustion engines, which has an outer side portion (ie facing the cylinder wall) which is not lined at least at its lower end.
  • the present invention also relates to a piston ring which, more particularly describing, is a compression ring and has a physically deposited side outer portion coated with steam except for the lower portion, which has no coating.
  • the present invention is directed to a piston ring manufacturing process objectified above.
  • a piston ring for use in internal combustion engines provided with an annular body defining an outer lateral surface sliding relative to the wall of a cylinder and comprising at least a first annular recess portion and a second, undercut portion, wherein the first undercut portion receives at least one deposited coating layer to achieve the height of the second undercut portion, defining a contact surface.
  • a piston ring manufacturing process particularly a piston ring as defined above, comprising the following steps:
  • Figure 1 is a schematic view of a piston ring manufactured in accordance with the teachings of the prior art US 7,871,078.
  • Figure 2 is a schematic view of the process of manufacturing a first configurative variation of the piston ring according to the teachings of the present invention.
  • Figure 3 is a schematic view of the process of manufacturing a second configurative variation of the piston ring according to the teachings of the present invention.
  • the present invention relates to a piston ring A for use in internal combustion engines provided with a coating on only part of its extreme side surface, so that when least the lower portion of the ring does not receive any type of coating analogous to that applied.
  • ring A has the configuration of a compression ring or first groove, but alternatively it may have the configuration of a second groove ring or an oil scraper ring, yet is included within the scope of protection of the appended claims.
  • the piston ring The object of the present invention is provided with an annular body defining an outer side surface 1 which slides relative to the wall of a cylinder when it is mounted on the piston within a cylinder.
  • the outer side surface 1 comprises at least a first annular recess portion 2 and a second, undercut portion 3.
  • the first annular recess portion 2 is made on the entire outer lateral surface 1 of the ring except for its lower end 7 so as to define beside it the second portion 3 not lowered.
  • the first undercut portion 2 causes the second undercut portion 3 to take the form of an annular protrusion defining the maximum diameter of the piston ring.
  • the first undercut portion 2 is made by any necessary or desirable mechanical forming tool / process, and the choice of a given technique for carrying it out is indifferent to the definition of the scope of protection of the invention.
  • a repellent film 6 is applied in order to prevent the coating from sticking over it.
  • the repellent film 6 is applied to the entire outer side surface 1 or at least part thereof, which, after the annular recess, will form the second, undercut portion 3.
  • the repellent film 6 which had been deposited in that region no longer exists, leaving only the second, undercut portion 3, which did not undergo any mechanical forming operation. .
  • the outer side surface 1 comprising the first annular recess portion 2 and the second, undercut portion 3
  • a coating layer 4 important for the piston exhibits durability and conformability for millions of cycles when operating the internal combustion engine fitted with it.
  • the first undercut portion 2 receives at least one coating layer 4 deposited to reach the height of the second undercut portion 3, defining a contact surface 5.
  • the coating layer 4 is deposited / applied by the physical vapor deposition (PVD) process. Although it is applied to the entire outer lateral surface 1 of the ring, it will not adhere to the second undercut portion, as there is the repellent film 6. Thus, the coating layer will only be effectively applied. deposited on the first undercut portion 2, and will be until it reaches the height of the second undercut portion 3, crimping, to define a contact surface 5.
  • PVD physical vapor deposition
  • the coating layer 4 is composed of a ceramic material such as chromium nitride (CrN), although it may vary freely without the resulting invention being no longer within the scope of protection of the claims.
  • the repellent film 6 is composed of boron nitride, but it can of course vary, the only requirement being that it effectively functions as a repellent, preventing deposition of coating layer 4 on the second undercut portion.
  • film 6 may be applied by any necessary or desirable process.
  • a ring A may be designed according to the teachings of the present invention in which there are two portions 3 not recessed, respectively defining lower and upper portions of the side surface 1, so as to define with each other a first recess portion 2 to which the coating is applied. This configurative variation is illustrated in figure 3.
  • the manufacturing process of the piston ring A hereinafter described and defined comprises the following steps:
  • Step (ii) comprises applying a repellent film 6 which, as mentioned above, has a preferred boron nitride constitution, although it may vary freely.
  • step (iii) the annular recess defining the first recess portion 2 is made on the entire outer lateral surface 1 except for its lower end 7.
  • the coating layer is applied by the physical vapor deposition (PVD) process and composed of a ceramic material such as chromium nitride (CrN).
  • a step (v) of light surface finish is provided for removing the repellent film 6.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Abstract

La présente invention concerne un segment de piston (A) pour moteurs à combustion interne, comprenant un corps annulaire définissant une surface latérale extérieure (1) qui coulisse par rapport à la paroi d'un cylindre et qui comprend au moins une première partie évidement (2) annulaire et une seconde partie non évidée (3), la première partie évidement (2) recevant au moins une couche de revêtement (4) déposée de manière à atteindre la hauteur de la seconde partie non évidée (3), définissant une surface de contact (5). L'invention concerne également le procédé de fabrication de ce segment de piston (A).
PCT/BR2014/000001 2013-01-11 2014-01-08 Segment de piston pour moteurs à combustion interne et procédé de fabrication de segment de piston Ceased WO2014107780A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112014000402.2T DE112014000402T5 (de) 2013-01-11 2014-01-08 Kolbenring zur Verwendung in Verbrennungsmotoren und Verfahren zur Herstellung eines Kolbenrings

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BRBR1020130008095 2013-01-11
BRBR102013000809-5A BR102013000809A2 (pt) 2013-01-11 2013-01-11 Anel de pistão para uso em motores de combustão interna e processo de fabricação de anel de pistão

Publications (1)

Publication Number Publication Date
WO2014107780A1 true WO2014107780A1 (fr) 2014-07-17

Family

ID=50230825

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/BR2014/000001 Ceased WO2014107780A1 (fr) 2013-01-11 2014-01-08 Segment de piston pour moteurs à combustion interne et procédé de fabrication de segment de piston

Country Status (3)

Country Link
BR (1) BR102013000809A2 (fr)
DE (1) DE112014000402T5 (fr)
WO (1) WO2014107780A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017104221A1 (de) * 2017-03-01 2018-09-06 Federal-Mogul Burscheid Gmbh Kolbenring

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1467129A1 (fr) * 2002-01-18 2004-10-13 Kabushiki Kaisha Riken Segment de piston de pulverisation
DE102007007965A1 (de) * 2007-02-17 2008-08-21 Federal-Mogul Burscheid Gmbh Kolbenring
US7871078B2 (en) 2003-12-19 2011-01-18 Federal-Mogul Burscheid Gmbh Piston ring and method for the production thereof
WO2012045294A1 (fr) * 2010-10-07 2012-04-12 Federal-Mogul Burscheid Gmbh Procédé de fabrication d'un segment de piston
WO2012045295A1 (fr) * 2010-10-08 2012-04-12 Federal-Mogul Burscheid Gmbh Procédé de fabrication d'un segment de piston
WO2012107012A1 (fr) * 2011-02-09 2012-08-16 Federal-Mogul Burscheid Gmbh Segment de piston
WO2012126446A1 (fr) * 2011-03-19 2012-09-27 Federal-Mogul Burscheid Gmbh Procédé pour produire des segments de piston
DE102012002447A1 (de) * 2011-05-21 2012-11-22 Mahle International Gmbh Kolbenring und Verfahren zu seiner Herstellung
DE102011102205A1 (de) * 2011-05-21 2012-11-22 Mahle International Gmbh Verfahren zum Bearbeiten einer Oberfläche eines Bauteils sowie Bauteil
DE102011102897A1 (de) * 2011-05-31 2012-12-06 Federal-Mogul Burscheid Gmbh Kolbenring

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1467129A1 (fr) * 2002-01-18 2004-10-13 Kabushiki Kaisha Riken Segment de piston de pulverisation
US7871078B2 (en) 2003-12-19 2011-01-18 Federal-Mogul Burscheid Gmbh Piston ring and method for the production thereof
DE102007007965A1 (de) * 2007-02-17 2008-08-21 Federal-Mogul Burscheid Gmbh Kolbenring
WO2012045294A1 (fr) * 2010-10-07 2012-04-12 Federal-Mogul Burscheid Gmbh Procédé de fabrication d'un segment de piston
WO2012045295A1 (fr) * 2010-10-08 2012-04-12 Federal-Mogul Burscheid Gmbh Procédé de fabrication d'un segment de piston
WO2012107012A1 (fr) * 2011-02-09 2012-08-16 Federal-Mogul Burscheid Gmbh Segment de piston
WO2012126446A1 (fr) * 2011-03-19 2012-09-27 Federal-Mogul Burscheid Gmbh Procédé pour produire des segments de piston
DE102012002447A1 (de) * 2011-05-21 2012-11-22 Mahle International Gmbh Kolbenring und Verfahren zu seiner Herstellung
DE102011102205A1 (de) * 2011-05-21 2012-11-22 Mahle International Gmbh Verfahren zum Bearbeiten einer Oberfläche eines Bauteils sowie Bauteil
DE102011102897A1 (de) * 2011-05-31 2012-12-06 Federal-Mogul Burscheid Gmbh Kolbenring

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017104221A1 (de) * 2017-03-01 2018-09-06 Federal-Mogul Burscheid Gmbh Kolbenring
US11078868B2 (en) 2017-03-01 2021-08-03 Federal-Mogul Burscheid Gmbh Piston ring

Also Published As

Publication number Publication date
BR102013000809A2 (pt) 2015-06-02
DE112014000402T5 (de) 2015-10-01

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