EP0449848A1 - Pisotn plongeur leger pour moteurs a combustion interne. - Google Patents

Pisotn plongeur leger pour moteurs a combustion interne.

Info

Publication number
EP0449848A1
EP0449848A1 EP89912953A EP89912953A EP0449848A1 EP 0449848 A1 EP0449848 A1 EP 0449848A1 EP 89912953 A EP89912953 A EP 89912953A EP 89912953 A EP89912953 A EP 89912953A EP 0449848 A1 EP0449848 A1 EP 0449848A1
Authority
EP
European Patent Office
Prior art keywords
piston
pressure side
area
shaft
axis
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.)
Granted
Application number
EP89912953A
Other languages
German (de)
English (en)
Other versions
EP0449848B1 (fr
Inventor
Emil Ripberger
Juergen Ellermann
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 GmbH
Original Assignee
Mahle 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
Priority claimed from DE3843866A external-priority patent/DE3843866A1/de
Priority claimed from DE3843761A external-priority patent/DE3843761A1/de
Application filed by Mahle GmbH filed Critical Mahle GmbH
Publication of EP0449848A1 publication Critical patent/EP0449848A1/fr
Application granted granted Critical
Publication of EP0449848B1 publication Critical patent/EP0449848B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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 
    • F02F3/02—Pistons  having means for accommodating or controlling heat expansion
    • 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 
    • F02F3/02—Pistons  having means for accommodating or controlling heat expansion
    • F02F3/025—Pistons  having means for accommodating or controlling heat expansion having circumferentially slotted piston skirts, e.g. T-slots
    • 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 
    • F02F3/02—Pistons  having means for accommodating or controlling heat expansion
    • F02F3/022—Pistons  having means for accommodating or controlling heat expansion the pistons having an oval circumference or non-cylindrical shaped skirts, e.g. oval
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B1/00—Engines characterised by fuel-air mixture compression
    • F02B1/02—Engines characterised by fuel-air mixture compression with positive ignition
    • F02B1/04—Engines characterised by fuel-air mixture compression with positive ignition with fuel-air mixture admission into cylinder

Definitions

  • the invention relates to a lightweight plunger for internal combustion engines according to the preamble of claim 1.
  • the piston shaft on the counter-pressure side is designed to be somewhat more flexible overall than on the pressure side.
  • the running play on the counterpressure side can be chosen to be less than the cylinder running surface than on the pressure side.
  • the one on the print page The longer shaft compared to the counter pressure side has the following effects in engine operation:
  • the axis of the bolt axis is dislocated to the pressure side, which causes the piston on its top land to come into contact with the cylinder on the counter-pressure side.
  • the longer shaft prevents the top land from striking in this way and thus increases piston noise.
  • a piston according to the invention is shown in the drawing. Show it
  • Fig. 1 shows a piston in longitudinal section
  • Fig. 2a, b the piston in section along line Ha and Ilb
  • Fig. 3 shows the view of another piston
  • Fig. 4 shows the generatrix of the piston of FIG. 3 in the pressure-counter pressure direction and in the bolt direction on the pressure side of the piston
  • Fig. 5 shows the surface line course of the piston according to Fig. 3 in the pressure-counter pressure direction and in the bolt direction the counter pressure side of the piston
  • FIG. 6 shows a section through the piston along line VI-VI in FIG. 3
  • the piston according to FIG. 1 has a longer shaft on the pressure side DS than the counter pressure side GDS.
  • the wall thickness of the shaft is greater on the pressure side DS than on the counter pressure side GDS, on which a horizontal slot separates the shaft from the piston head within the lowest annular groove.
  • the slot and the thinner wall thickness of the shaft ensure a certain elastic flexibility on the counter-pressure side GDS, which should not be present on the pressure side.
  • the control strips inserted in the interior of the piston skirt of the piston according to FIG. 1 enable the skirt to be guided more closely when the piston is cold. Due to the arrangement of the control strip on the counterpressure side GDS compared to the pressure side closer to the upper shaft end, the play between the upper shaft and cylinder area there can be set lower in the cold state than in the relevant shaft area on the pressure side.
  • the curves DR and DB on the pressure side as well as GR and GB on the pressure side indicate the surface line course in the pressure-counter pressure direction for a piston according to FIG. 3.
  • the straight lines 0 in FIGS. 4 and 5 indicate the cylinder track for the piston. In the areas in which the DR or GR curves touch the respective straight line 0, the clearance between the piston skirt and the cylinder surface is zero. In general, the distance between the curves GR, GB, DR and DB on the one hand and the straight line 0 on the other hand means the play of the piston running surface against the cylinder running surface.
  • the curvature of the curves DR, DB and GR, GB corresponds to the respective piston outer shape.
  • the piston skirt on the counter pressure side has a lower crowning in the upper skirt area than in the comparable area on the pressure side.
  • the narrower guide on the Gegen ⁇ pressure side is determined by the total of the more compliant Aus ⁇ 'piston shaft on this side of the piston formation possible.
  • the higher flexibility is achieved on the one hand by a horizontal slot between the shaft and the piston head and on the other hand by the greater ovality of the piston shaft in the circumferential direction.
  • the resilience of the piston skirt on the counter pressure side can also be increased by the fact that the shaft thickness there is less than in the corresponding area on the pressure side.
  • the stretch-regulating insert strip indicated by the dot-dash line in FIG. 3 lies axially on the counter pressure side higher than the upper shaft edge than on the pressure side.
  • the ribs located in the area of the pressure side of the piston can be made more solid and thus more stable than the ribs in question the counter pressure side. It is also possible that ribs of this type, in the case of hubs which are otherwise freely formed on the piston crown, are only attached to the pressure side, while they can be entirely absent on the counter pressure side.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Abstract

Un piston plongeur de poids et de dimensions aussi réduits que possible fonctionne avec le moins de bruit possible. A cet effet, la partie supérieure de la tige du piston est séparée de la tête du piston par une fente horizontale ménagée du côté contre-pression d'un plan qui traverse l'axe longitudinal du piston et de l'axe de piston. En outre, la tige peut être plus longue du côté pression que du côté contre-pression.
EP89912953A 1988-12-24 1989-11-29 Pisotn plongeur leger pour moteurs a combustion interne Expired - Lifetime EP0449848B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3843761 1988-12-24
DE3843866 1988-12-24
DE3843866A DE3843866A1 (de) 1988-12-24 1988-12-24 Leichter tauchkolben fuer verbrennungsmotoren
DE3843761A DE3843761A1 (de) 1988-12-24 1988-12-24 Leichter tauchkolben fuer verbrennungsmotoren

Publications (2)

Publication Number Publication Date
EP0449848A1 true EP0449848A1 (fr) 1991-10-09
EP0449848B1 EP0449848B1 (fr) 1994-02-09

Family

ID=25875633

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89912953A Expired - Lifetime EP0449848B1 (fr) 1988-12-24 1989-11-29 Pisotn plongeur leger pour moteurs a combustion interne

Country Status (7)

Country Link
US (1) US5158008A (fr)
EP (1) EP0449848B1 (fr)
JP (1) JP2983621B2 (fr)
KR (1) KR970003153B1 (fr)
BR (1) BR8907852A (fr)
DE (1) DE58906955D1 (fr)
WO (1) WO1990007642A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107917013A (zh) * 2016-10-11 2018-04-17 现代自动车株式会社 具有改善的润滑性能的活塞总成

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5379680A (en) * 1989-09-25 1995-01-10 Alcan Deutschland Gmbh Piston for an internal combustion engine
DE4110306A1 (de) * 1990-09-20 1992-03-26 Mahle Gmbh Tauchkolben aus leichtmetall fuer ottomotoren
JPH06257507A (ja) * 1993-03-09 1994-09-13 Nissan Motor Co Ltd 内燃機関のピストン
DE4326978A1 (de) * 1993-08-11 1995-02-16 Alcan Gmbh Kolben für Brennkraftmaschinen, insbesondere für Dieselmotoren
JP3541511B2 (ja) * 1995-07-07 2004-07-14 いすゞ自動車株式会社 ピストン
DE19643778C2 (de) * 1996-10-23 2000-04-13 Alcan Gmbh Leichtbaukolben
RU2257484C1 (ru) * 2004-02-16 2005-07-27 Южно-Уральский государственный университет Трибосопряжение поршень - цилиндр двигателя внутреннего сгорания
CA2840589C (fr) * 2005-11-03 2016-02-02 Dresser, Inc. Piston
US7293497B2 (en) 2005-11-03 2007-11-13 Dresser, Inc. Piston
US7302884B2 (en) 2005-11-03 2007-12-04 Dresser, Inc. Piston
US8807109B2 (en) * 2009-11-06 2014-08-19 Federal-Mogul Corporation Steel piston with cooling gallery and method of construction thereof
US9970384B2 (en) * 2009-11-06 2018-05-15 Federal-Mogul Llc Steel piston with cooling gallery and method of construction thereof
US9470311B2 (en) 2012-06-14 2016-10-18 Mahle International Gmbh Lightweight engine power cell assembly
WO2022105099A1 (fr) * 2020-11-20 2022-05-27 浙江春风动力股份有限公司 Motocyclette et son moteur
CN119554152A (zh) * 2024-11-29 2025-03-04 广西玉柴机器股份有限公司 一种降ch原排的非对称小侧隙活塞结构

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1499073A (en) * 1919-09-04 1924-06-24 Aluminum Co Of America Piston
GB1256242A (en) * 1968-09-05 1971-12-08 Ass Eng Ltd Improvements in pistons
US3908521A (en) * 1972-07-31 1975-09-30 Hepworth & Grandage Ltd Pistons for internal combustion engines or for compressors
JPS601942B2 (ja) * 1982-04-15 1985-01-18 三菱マテリアル株式会社 高温特性のすぐれた切削工具および耐摩耗工具用焼結材料
DE3430132A1 (de) * 1984-08-16 1986-02-27 Mahle Gmbh, 7000 Stuttgart Aluminium-tauchkolben fuer verbrennungsmotoren mit regelstreifen
DE3430258A1 (de) * 1984-08-17 1986-02-27 Mahle Gmbh, 7000 Stuttgart Tauchkolben fuer verbrennungsmotoren
IT1182507B (it) * 1985-07-12 1987-10-05 Ae Borgo Spa Pistoni con profilo asimmetrico per motori a combustione interna
DE3527032A1 (de) * 1985-07-27 1987-01-29 Mahle Gmbh Tauchkolben, insbesondere fuer verbrennungsmotoren
DE3820473C2 (de) * 1986-12-18 1998-03-26 Mahle Gmbh Leichter Tauchkolben für Verbrennungsmotoren
US5048398A (en) * 1986-12-23 1991-09-17 Mahle Gmbh Single, light-weight and low friction light-metal piston for internal-combustion engines
US5000078A (en) * 1987-04-18 1991-03-19 Mahle Gmbh Light metal trunk piston for internal combustion engines
JPS6457461A (en) * 1987-08-28 1989-03-03 Canon Kk Recorder

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9007642A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107917013A (zh) * 2016-10-11 2018-04-17 现代自动车株式会社 具有改善的润滑性能的活塞总成

Also Published As

Publication number Publication date
JPH04502501A (ja) 1992-05-07
KR970003153B1 (ko) 1997-03-14
KR910700404A (ko) 1991-03-15
WO1990007642A1 (fr) 1990-07-12
DE58906955D1 (de) 1994-03-24
BR8907852A (pt) 1991-10-08
US5158008A (en) 1992-10-27
EP0449848B1 (fr) 1994-02-09
JP2983621B2 (ja) 1999-11-29

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