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WO2012130799A1 - Ouvertures de retenue d'huile définies dans des alésages d'axe - Google Patents

Ouvertures de retenue d'huile définies dans des alésages d'axe Download PDF

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Publication number
WO2012130799A1
WO2012130799A1 PCT/EP2012/055324 EP2012055324W WO2012130799A1 WO 2012130799 A1 WO2012130799 A1 WO 2012130799A1 EP 2012055324 W EP2012055324 W EP 2012055324W WO 2012130799 A1 WO2012130799 A1 WO 2012130799A1
Authority
WO
WIPO (PCT)
Prior art keywords
piston
pin
blind holes
zenith
blind
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/EP2012/055324
Other languages
German (de)
English (en)
Inventor
Wolfram Cromme
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 WO2012130799A1 publication Critical patent/WO2012130799A1/fr
Anticipated expiration legal-status Critical
Ceased 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 
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C17/00—Sliding-contact bearings for exclusively rotary movement
    • F16C17/12—Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load
    • F16C17/18—Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load with floating brasses or brushing, rotatable at a reduced speed
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/06—Sliding surface mainly made of metal
    • F16C33/10—Construction relative to lubrication
    • F16C33/1025—Construction relative to lubrication with liquid, e.g. oil, as lubricant
    • F16C33/106—Details of distribution or circulation inside the bearings, e.g. details of the bearing surfaces to affect flow or pressure of the liquid
    • F16C33/1075—Wedges, e.g. ramps or lobes, for generating pressure
    • 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
    • F16J1/00—Pistons; Trunk pistons; Plungers
    • F16J1/10—Connection to driving members
    • F16J1/14—Connection to driving members with connecting-rods, i.e. pivotal connections
    • F16J1/16—Connection to driving members with connecting-rods, i.e. pivotal connections with gudgeon-pin; Gudgeon-pins

Definitions

  • the piston pin is in contact via friction surfaces in the pin bores, wherein in addition to thermal
  • the piston pin is for
  • EP 0 740 750 B1 discloses a light metal piston for internal combustion engines
  • the recesses are produced without cutting by casting, roughening or the like, as well as by machining.
  • the recesses extend from the groove for the piston pin safety to Piston interior, over a length of 10 to 80% of
  • EP 0 740 750 B1 proposes a roughening of the bolt holes in the area of the zenith by means of laser beams.
  • An object of the invention is that
  • Piston pin come into contact, provided with a plurality of blind hole-shaped depressions.
  • the recesses or blind holes damage the friction surface of the pin holes only locally, so that
  • the blind holes are provided as micro-wells about 50 ⁇ m in diameter and / or depth.
  • Piston material itself can be formed as well as in a separately inserted socket.
  • the piston according to the invention can advantageously be combined with both a "floating" piston pin and a so-called “Klemmpleuelbolzen.”
  • a "floating" bolt means that the bolt in the piston and / or connecting rod can rotate freely. In the starting d. H. When cold, there is a so-called cold play between the bolt and the connecting rod as well as between the bolt and the piston, which increases as a result of the heating during operation. Through the game is one at any time
  • the bolt is thermally joined in the connecting rod and so far can not rotate freely. However, there is a game between the bolt and the piston, only on the retaining rings for axial fixation can be dispensed with. Also in this embodiment, the bolt rotates
  • Invention obtained lubrication can be used in an advantageous manner as well as a floating storage.
  • blind holes are preferably one
  • Blind holes in the zenith of the pin bore preferably have a smaller size in order to affect the structural integrity of the piston material only slightly in the area of high loads. Even more preferred are not directly in the area of the zenith
  • the depths of the bolt holes can gradually decrease from the bottom to the zenith of the hole.
  • the term “gradual” also includes a gradual decrease, with the percentage or absolute decrease in depth from the bottom to the zenith not being linear.
  • Stress distribution of the bolt holes may alternatively or additionally be provided a decrease in the opening cross-sections from the lower portion of the bore to the zenith, so that the opening cross sections (perpendicular to the direction of insertion of the blind holes) in the zenith of the pin hole smaller, preferably equal to zero, or from the lower portion of the pin hole gradually decrease to the zenith.
  • the blind hole density can additionally or alternatively be controlled in this way to the blind hole depths and / or opening cross sections.
  • Blind hole density is the number of blind holes per unit area.
  • Piston shaft has an outer side and a cavity forming an inner side.
  • the thermal and mechanical loads on the pin bore are larger on the inside, in the axial direction of the pin hole, than on the pin hole Outside.
  • the depths of the blind holes in the axial direction of the pin bore inside preferably fall smaller than outside, or they fall away completely in an inner region, the depths preferably decreasing gradually from outside to inside.
  • the opening cross-sections may be smaller from the outside in, the decrease preferably taking place gradually.
  • blind hole density in the piston pin in the inner region of the piston shaft turn out smaller, the blind hole density preferably gradually decreases from outside to inside in the axial direction of the pin bore.
  • Blind hole cross-section and blind hole density along the axial direction of the bolt can be used individually or in any combination to adapt to the given
  • Blind holes are introduced selectively, an adaptation or readjustment to the given load conditions, possibly incorporating new knowledge, in the context of the manufacturing process quickly, without a fundamental
  • a laser is preferably used with which damage to the material surrounding the blind holes areas is minimized.
  • alternative can wells of the above type means
  • Electron beam drilling can be created.
  • the holes have a typical shape.
  • through-openings which are not included in the invention, is the
  • the drilling or lasering of the blind holes is preferably carried out with a high surface quality, as is ensured for example by helical drilling.
  • helical drilling the laser radiation is set in a rotational movement relative to the workpiece.
  • material removal due to the low Abtragsvolumens per pass multiple passes over the workpiece required.
  • FIG. 1 shows in a cross section a
  • Figure 2 shows schematically a piston for
  • FIGS. 3a to 3g show distribution geometries
  • FIG. 1 is a cross-section through a piston taken along the axial direction of a pin bore 20 and axially along a piston stem 11.
  • the piston has a piston head 10 with combustion bowl 12 and grooves 13, 14, 15 for piston rings. Further, a cooling channel 16 is provided, through which the piston can be cooled in its highly loaded areas.
  • the pin bore 20 of the piston skirt 11 has a
  • thetientkringelte area 30 shows a section of particularly high thermal and mechanical stress.
  • Section 30 forms around the zenith 22 around. In the lower region 23 of the pin bore 20, however, the piston material is exposed to lower loads. Furthermore, the section of particularly high load 30 is displaced to the left in FIG. 1, ie the piston material in the region of the pin bore 20 is exposed to higher loads inside than outside.
  • “outside” denotes the
  • the pistons indicate in the pin bore 20
  • the lubrication pockets should be made less bulky and / or less deep and / or less frequent in the region of increased stress. If necessary for the strength and the lubrication still sufficient, these can be omitted in the highest loaded area.
  • the lubrication pockets can be used on bushes and busheless pistons.
  • the size and / or depth of the blind holes should be made smaller and / or less deep towards the zenith 22. This is also to be considered in the longitudinal direction of the piston bore. In order to do justice to the load distribution shown in FIG. 1, it has thus been found to be sensible to use the
  • FIGS. 3 a to 3 g geometries of the distribution of the blind holes and cross-sectional changes thereof are shown, as they can be introduced into the friction surface 21 of the pin bore 20.
  • the eye is here on the
  • the depth of the blind holes is not shown but may alternatively or additionally be varied as described above. It should be noted, however, that Figures 3a to 3g are schematic in nature and merely by way of example show possible distribution geometries of blind holes and changes in their diameters. The position and orientation of the friction surface cutouts shown in the overall structure of the piston are only partially apparent.
  • FIG. 3a there are no blind holes in the area of the zenith and in the region of the friction surface on the cavity side.
  • blind holes are made on both sides of the zenith, the diameter of which increases in the circumferential direction of the pin bore 20 away from the zenith 22 in FIG. 3b.
  • FIG. 3b similar to FIG. 3c shows a one-sided arrangement.
  • the increase of the blind hole diameter is shown in the longitudinal direction along the pin axis.
  • the blind holes extend in the circumferential direction, wherein no blind hole is provided in the zenith. In the circumferential direction from the zenith, the blind holes are larger.
  • FIG. 3f shows a line along the pin axis.
  • a linear geometry in which two

Landscapes

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

Abstract

L'invention concerne un piston pour moteurs à combustion interne qui présente une jupe de piston (11) dans laquelle sont formés des alésages d'axe, la surface intérieure d'au moins un alésage d'axe (20), qui entre en contact avec l'axe de piston lors d'un usage conforme du piston, présentant une pluralité de dépressions en forme de trous borgnes.
PCT/EP2012/055324 2011-03-31 2012-03-26 Ouvertures de retenue d'huile définies dans des alésages d'axe Ceased WO2012130799A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011006498.2 2011-03-31
DE102011006498A DE102011006498A1 (de) 2011-03-31 2011-03-31 Definierte Ölhalteöffnungen in Bolzenbohrungen

Publications (1)

Publication Number Publication Date
WO2012130799A1 true WO2012130799A1 (fr) 2012-10-04

Family

ID=45928880

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/055324 Ceased WO2012130799A1 (fr) 2011-03-31 2012-03-26 Ouvertures de retenue d'huile définies dans des alésages d'axe

Country Status (2)

Country Link
DE (1) DE102011006498A1 (fr)
WO (1) WO2012130799A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017205535A1 (fr) 2016-05-27 2017-11-30 Novozymes, Inc. Polypeptides présentant une activité endoglucanase et polynucléotides codant pour ceux-ci

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110230638A (zh) * 2019-06-13 2019-09-13 天津大学 一种全工况复合结构滑动轴

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09195847A (ja) * 1996-01-11 1997-07-29 Nissan Motor Co Ltd 内燃機関のピストン支持構造
EP0740750B1 (fr) 1994-11-22 1999-05-26 KOLBENSCHMIDT Aktiengesellschaft Piston en alliage léger pour moteurs à combustion interne
EP1232349B1 (fr) 1999-11-24 2004-12-22 Mahle Gmbh Pistons pour moteurs a combustion
US20060021500A1 (en) * 2002-11-29 2006-02-02 Werner Anderson Piston for an internal combustion engine
US20060144351A1 (en) * 2002-11-29 2006-07-06 Eberhard Fezer Piston-pin boss of a piston for an internal combustion engine
US20080250922A1 (en) * 2007-04-10 2008-10-16 James Russell Hayes Piston with pin bore lubrication features

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19700339C2 (de) * 1996-01-30 2001-06-13 Federal Mogul Wiesbaden Gmbh Haupt- oder Pleuellagerelement
DE50203628D1 (de) * 2002-11-16 2005-08-18 Gehring Gmbh & Co Kg Pleuelstange und Verfahren zu deren Herstellung
DE10340990A1 (de) * 2003-09-05 2005-04-28 Ks Kolbenschmidt Gmbh Feinbearbeitete Oberfläche der Bolzenlöcher eines Kolbens

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0740750B1 (fr) 1994-11-22 1999-05-26 KOLBENSCHMIDT Aktiengesellschaft Piston en alliage léger pour moteurs à combustion interne
JPH09195847A (ja) * 1996-01-11 1997-07-29 Nissan Motor Co Ltd 内燃機関のピストン支持構造
EP1232349B1 (fr) 1999-11-24 2004-12-22 Mahle Gmbh Pistons pour moteurs a combustion
US20060021500A1 (en) * 2002-11-29 2006-02-02 Werner Anderson Piston for an internal combustion engine
US20060144351A1 (en) * 2002-11-29 2006-07-06 Eberhard Fezer Piston-pin boss of a piston for an internal combustion engine
US20080250922A1 (en) * 2007-04-10 2008-10-16 James Russell Hayes Piston with pin bore lubrication features

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017205535A1 (fr) 2016-05-27 2017-11-30 Novozymes, Inc. Polypeptides présentant une activité endoglucanase et polynucléotides codant pour ceux-ci

Also Published As

Publication number Publication date
DE102011006498A1 (de) 2012-10-04

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