WO1988000289A1 - Segment de piston - Google Patents

Segment de piston Download PDF

Info

Publication number
WO1988000289A1
WO1988000289A1 PCT/AU1987/000207 AU8700207W WO8800289A1 WO 1988000289 A1 WO1988000289 A1 WO 1988000289A1 AU 8700207 W AU8700207 W AU 8700207W WO 8800289 A1 WO8800289 A1 WO 8800289A1
Authority
WO
WIPO (PCT)
Prior art keywords
piston ring
zone
ring
wear
compression piston
Prior art date
Application number
PCT/AU1987/000207
Other languages
English (en)
Inventor
Robert Walter Vowles
Original Assignee
Engine Technology Limited
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 Engine Technology Limited filed Critical Engine Technology Limited
Publication of WO1988000289A1 publication Critical patent/WO1988000289A1/fr

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 invention concerns improvements in compression piston rings for piston internal combustion engines.
  • compression piston rings are provided to prevent leakage of combustion-generated pressure from the combustion chamber past the piston into the crankcase. Cylinder leakage results in a decrement in engine performance and efficiency due to the loss of gas pressure.
  • the present invention aims at providing an engine compression piston ring which substantially extends the life of an engine by minimising the development of cylinder * Q leakage caused by wear.
  • a compression piston ring for an engine defining a peripheral face adapted to engage an engine cylinder wall, said ring being characterized by a peripheral edge adapted 1 ⁇ to face toward a pressure zone of said cylinder being more resistant to wear than the remainder of the peripheral face of the said ring.
  • the said wear resistant peripheral edge is formed by a thin zone of either a different material to the remainder of the ring or by the
  • an engine compression piston ring for use in an engine cylinder defining a peripheral
  • said 25 face divided into a first zone adjacent, in use, a pressure side of said cylinder and a second zone adjacent a crankcase side of said cylinder, said second zone, at least during initial stages of use being adapted to wear at a faster rate than said first zone.
  • said second zone is
  • the first zone is arranged to be harder or more wear resistant than the second
  • compression piston ring 3 is accommodated within groove 8 in piston 2.
  • the upper surface 7 of the said piston ring is made with a thin layer of material harder than the other parts of the ring, said layer being created by electroplating the surface with a harder material, by fusing to it a layer of harder material, or by treating it with ion implantation techniques or the like.
  • the cylinder bore contact face 6 of piston ring 3 is made textured such that it comprises a large multiplicity of small contact areas. This may be achieved by a multiplicity of shallow grooves, by a knurled configuration or by any other suitable means.
  • the piston ring groove is made of a harder, wear resistant material cast into the piston, to ensure the alignment of the said piston ring.
  • the material from which cylinder block 1 or cylinder bore 4 are manufactured are selected to be compatible with the two piston ring materials.
  • initial wear of the said large multiplicity of small contact areas in the relatively softer textured cylinder bore contact face of the said piston ring ensures that maximum cylinder bore contact pressure is developed at the harder upper edge. This ensures good ring seal at the earliest possible point in the life of the engine.
  • the hardness of the said piston ring upper edge ensures that it maintains its sharpness in service.
  • the subsequent differential wear rates of the harder upper edge and the lower softer parts of the piston ring ensures that maximum cylinder bore contact pressure is maintained at the said upper edge.
  • the provision of a harder piston ring groove cast into the piston limits any tendency of the piston jring to twist as a result of the difference in cylinder bore contact pressures between its upper and lower edges.

Landscapes

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

Abstract

Un segment de piston de compression (3) de conception améliorée, destiné à être utilisé dans des moteurs à mouvement alternatif à combustion interne, comprend une surface périphérique (6) d'engagement dans le cylindre présentant une zone latérale (7) faisant face à la zone de combustion du cylindre (4) du moteur, ladite zone latérale (7) formant une couche dont la dureté ou la résistance à l'usure est supérieure à celle du reste de la surface périphérique. La texture de ladite surface périphérique restante présente, du moins durant l'utilisation initiale, une multitude de petites zones de contact s'usant plus rapidement que ladite zone latérale (7), l'alignement du segment de piston (3) étant assuré grâce à une résistance à l'usure du matériau constituant la gorge (8) du segment de piston supérieure à celle du reste du piston (2).
PCT/AU1987/000207 1986-07-09 1987-07-09 Segment de piston WO1988000289A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPH6818 1986-07-09
AU681886 1986-07-09

Publications (1)

Publication Number Publication Date
WO1988000289A1 true WO1988000289A1 (fr) 1988-01-14

Family

ID=3697409

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1987/000207 WO1988000289A1 (fr) 1986-07-09 1987-07-09 Segment de piston

Country Status (1)

Country Link
WO (1) WO1988000289A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0949436A3 (fr) * 1998-04-07 1999-11-03 Federal-Mogul Burscheid GmbH Segment de piston pour moteur à combustion
US6719998B1 (en) 1998-07-14 2004-04-13 Yissum Research Development Company Of The Hebrew University Of Jerusalem Treatment of restenosis
US6984400B2 (en) 1998-07-14 2006-01-10 Yissum Research Development Company Of The Hebrew University Of Jerusalem Method of treating restenosis using bisphosphonate nanoparticles
US7008645B2 (en) 1998-07-14 2006-03-07 Yissum Research Development Company Of The Hebrew University Of Jerusalem Method of inhibiting restenosis using bisphosphonates
WO2014108226A1 (fr) * 2013-01-10 2014-07-17 Federal-Mogul Burscheid Gmbh Segment de piston à haute résistance à la fatigue pour moteur à combustion interne et procédé pour le fabriquer
US9498488B2 (en) 2003-06-27 2016-11-22 Biorest Ltd. Method of treating acute coronary syndromes
US9993427B2 (en) 2013-03-14 2018-06-12 Biorest Ltd. Liposome formulation and manufacture

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2148764A (en) * 1938-07-30 1939-02-28 Maack Hans Piston ring
US2488697A (en) * 1944-07-15 1949-11-22 Hastings Mfg Co Piston ring
US2580124A (en) * 1948-02-19 1951-12-25 Hastings Mfg Co Piston ring
GB664114A (en) * 1949-07-18 1952-01-02 British Piston Ring Company Lt Improvements relating to piston rings
GB1222072A (en) * 1967-04-12 1971-02-10 Wellworthy Ltd Improvements in or relating to sealing rings
EP0035127A1 (fr) * 1980-03-03 1981-09-09 Caterpillar Tractor Co. Procédé pour le durcissement par réfrigération d'une pièce d'insertion dans un élément de construction, et élément de construction traité selon ce procédé
US4414284A (en) * 1981-02-26 1983-11-08 Nippon Piston Ring Co., Ltd. Two layer sintered piston ring with a rest-curve like boundary

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2148764A (en) * 1938-07-30 1939-02-28 Maack Hans Piston ring
US2488697A (en) * 1944-07-15 1949-11-22 Hastings Mfg Co Piston ring
US2580124A (en) * 1948-02-19 1951-12-25 Hastings Mfg Co Piston ring
GB664114A (en) * 1949-07-18 1952-01-02 British Piston Ring Company Lt Improvements relating to piston rings
GB1222072A (en) * 1967-04-12 1971-02-10 Wellworthy Ltd Improvements in or relating to sealing rings
EP0035127A1 (fr) * 1980-03-03 1981-09-09 Caterpillar Tractor Co. Procédé pour le durcissement par réfrigération d'une pièce d'insertion dans un élément de construction, et élément de construction traité selon ce procédé
US4414284A (en) * 1981-02-26 1983-11-08 Nippon Piston Ring Co., Ltd. Two layer sintered piston ring with a rest-curve like boundary

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0949436A3 (fr) * 1998-04-07 1999-11-03 Federal-Mogul Burscheid GmbH Segment de piston pour moteur à combustion
US6719998B1 (en) 1998-07-14 2004-04-13 Yissum Research Development Company Of The Hebrew University Of Jerusalem Treatment of restenosis
US6984400B2 (en) 1998-07-14 2006-01-10 Yissum Research Development Company Of The Hebrew University Of Jerusalem Method of treating restenosis using bisphosphonate nanoparticles
US7008645B2 (en) 1998-07-14 2006-03-07 Yissum Research Development Company Of The Hebrew University Of Jerusalem Method of inhibiting restenosis using bisphosphonates
US9498488B2 (en) 2003-06-27 2016-11-22 Biorest Ltd. Method of treating acute coronary syndromes
US9827254B2 (en) 2003-06-27 2017-11-28 Biorest Ltd. Method of treating acute coronary syndromes
US10213446B2 (en) 2003-06-27 2019-02-26 Biorest Ltd. Method of treating acute coronary syndromes
US10517883B2 (en) 2003-06-27 2019-12-31 Zuli Holdings Ltd. Method of treating acute myocardial infarction
JP2016504544A (ja) * 2013-01-10 2016-02-12 フェデラル−モーグル ブルシェイド ゲーエムベーハーＦｅｄｅｒａｌ−Ｍｏｇｕｌ Ｂｕｒｓｃｈｅｉｄ Ｇｍｂｈ 内燃機関用に耐疲労性を高めたピストンリング及びその製造方法
WO2014108226A1 (fr) * 2013-01-10 2014-07-17 Federal-Mogul Burscheid Gmbh Segment de piston à haute résistance à la fatigue pour moteur à combustion interne et procédé pour le fabriquer
US9719596B2 (en) 2013-01-10 2017-08-01 Federal-Mogul Burscheid Gmbh Piston ring for internal combustion engines with increased fatigue strength, and method for producing same
US9993427B2 (en) 2013-03-14 2018-06-12 Biorest Ltd. Liposome formulation and manufacture
US10265269B2 (en) 2013-03-14 2019-04-23 Biorest Ltd. Liposome formulation and manufacture
US11633357B2 (en) 2013-03-14 2023-04-25 Zuli Holdings, Ltd. Liposome formulation and manufacture

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