EP1819922A1 - Piston en deux parties d'un moteur a combustion interne - Google Patents

Piston en deux parties d'un moteur a combustion interne

Info

Publication number
EP1819922A1
EP1819922A1 EP05816541A EP05816541A EP1819922A1 EP 1819922 A1 EP1819922 A1 EP 1819922A1 EP 05816541 A EP05816541 A EP 05816541A EP 05816541 A EP05816541 A EP 05816541A EP 1819922 A1 EP1819922 A1 EP 1819922A1
Authority
EP
European Patent Office
Prior art keywords
piston
combustion chamber
base body
combustion engine
internal combustion
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.)
Withdrawn
Application number
EP05816541A
Other languages
German (de)
English (en)
Inventor
Rainer Scharp
Stefan Fischer
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 International GmbH
Original Assignee
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 International GmbH filed Critical Mahle International GmbH
Publication of EP1819922A1 publication Critical patent/EP1819922A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
    • F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
    • F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
    • F02B23/0696—W-piston bowl, i.e. the combustion space having a central projection pointing towards the cylinder head and the surrounding wall being inclined towards the cylinder wall
    • 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
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
    • F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
    • F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
    • 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 
    • F02F3/0015—Multi-part pistons
    • F02F3/0023—Multi-part pistons the parts being bolted or screwed together
    • 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 
    • F02F3/16—Pistons  having cooling means
    • F02F3/20—Pistons  having cooling means the means being a fluid flowing through or along piston
    • F02F3/22—Pistons  having cooling means the means being a fluid flowing through or along piston the fluid being liquid
    • 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 
    • F02F3/26—Pistons  having combustion chamber in piston head
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the invention relates to a two-part piston for an internal combustion engine according to the preamble of claim 1.
  • a two-part piston with a combustion chamber in the piston crown which consists of an upper part and a base body, the upper part being screwed to the base body.
  • the combustion chamber is formed exclusively by the upper part, which is very thin-walled in the area of the combustion chamber, so that the upper part cannot withstand the mechanical stress that is exerted on the piston crown by the pressure prevailing in the combustion chamber.
  • the object of the present invention is to avoid this disadvantage of the prior art.
  • a mechanically and thermally highly resilient piston is achieved in that the combustion chamber is largely molded into the base body and in that the upper part is designed in a ring shape, so that the combustion pressure essentially acts on the base body, which has great mechanical strength, which means that the mechanical Resilience of the piston is increased.
  • the thermal load-bearing capacity of the piston is increased by the fact that the parts of the piston with the highest thermal load, the bowl rim and the top land, are formed by the upper part, which is made of forged aluminum or forged steel.
  • a two-part piston for an internal combustion engine in a section along the bent line AA in Fig. 2 and Fig. 2 is a plan view of the bottom of the piston.
  • Fig. 1 shows a piston 1 for an internal combustion engine in section along a bent line AA in Fig. 2, resulting in a sectional view consisting of two halves, the left half of which shows a sectional view of the piston 1, which is perpendicular to the longitudinal axis 2 of the Hub bore 3 and lying on the axis 4 of the piston 1 cutting plane, and the right half of which represents a sectional view of the piston 1, which is in a cutting plane offset by 45 °, so that here a second hub bore 3 1 is shown in an oblique section.
  • the piston 1 consists of a base body 5 and an upper part 6, the base body 5 and the upper part 6 being connected to one another by means of screws 7 to 12 arranged radially on the outside and evenly distributed over the circumference. See also Fig. 2.
  • the base body 5 has, on the underside facing away from the piston crown 13, pin hubs 14 and 14 ', each with a hub bore 3, 3' and shaft elements 15, 15 'connecting the pin hubs 14, 14' to one another.
  • a combustion chamber 16 is formed in the piston crown 13.
  • the base body 5 of the piston 1 has 13 annular grooves 17 and 18 on its radial outer side near the piston head 13.
  • the upper part 6 is essentially ring-shaped and is arranged on the base body 5 such that it enlarges the combustion chamber 16 formed in the base body 5 in the manner of a collar 19 on the piston bottom side and limits it radially outward, the inner radius of the collar 19 toward the top of the piston decreases so that there is an undercut 20 in the combustion chamber 16.
  • a sealing element 32 can be arranged between the upper part 6 and the base body 5.
  • the cooling channel 21 is connected to the piston interior 22 via oil inlet and oil outlet openings 27.
  • the screws 7 to 12 connecting the upper part 6 to the base body 5 are guided through the cone-shaped bores 23, 23 'of the upper part 6 on the piston head side and are partly screwed into blind holes with an internal thread 24 and partly into through holes 25 with an internal thread.
  • the screws 7 to 12 are guided through the cooling channel 21, which saves space, particularly in the case of smaller pistons.
  • the base body 5 is made of steel or aluminum, with a blank first being produced by forging or casting. Subsequently, the base body 5 is finished from the blank by means of a machining manufacturing process (turning, milling).
  • the upper part 6 is made of steel or aluminum in the forging process, whereby a blank is also first produced, which is finished by means of a machining production process. This ensures that the upper part 6 has sufficient strength so that it can perform the function of a wear-resistant ring carrier after a groove 26 has been worked into its radial outside for a compression ring (not shown in the figures).
  • the piston 1 according to the invention with the annular upper part 6 and with the combustion chamber 16 largely molded into the base body 5 has the advantage, on the one hand, that the combustion pressure essentially acts on the base body 5, which has great mechanical strength and resilience compared to that prevailing in the combustion chamber Has pressure.
  • the upper part 6 is inexpensive to manufacture because of its simple ring shape.
  • the trough edge and the top land, which are the parts of the piston 1 which are subjected to the greatest thermal stress are formed by the upper part 6, which is produced in the forging process and is thus highly resilient, so that the result is an overall thermally highly resilient piston.
  • Fig. 2 shows a plan view of the piston crown 13, which illustrates the distribution of the screws 7 to 12.
  • the combustion chamber 16 and valve pockets 28 to 31 incorporated into the piston crown 13 can also be seen,

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Combustion Methods Of Internal-Combustion Engines (AREA)

Abstract

L'invention concerne un piston en deux parties (1 ) destiné à un moteur à combustion interne et pourvu d'une chambre à combustion (16) dans le fond de piston (13). Ce piston comprend un corps de base (5) et un élément supérieur (6) vissé au corps de base (5). La partie inférieure de la chambre de combustion (16) est formée dans le corps de base (5). La partie supérieure (6) est annulaire et la partie supérieure (6) agrandit la chambre de combustion (16) à la manière d'un col (19) côté fond de piston et la limite radialement vers l'extérieur. En conséquence, la pression de combustion agit principalement sur le corps de base (5) qui a une grande résistance mécanique et une grande charge admissible vis-à-vis de la pression régnant dans la chambre de combustion.
EP05816541A 2004-11-30 2005-11-28 Piston en deux parties d'un moteur a combustion interne Withdrawn EP1819922A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004057625A DE102004057625A1 (de) 2004-11-30 2004-11-30 Zweiteiliger Kolben für einen Verbrennungsmotor
PCT/DE2005/002144 WO2006058525A1 (fr) 2004-11-30 2005-11-28 Piston en deux parties d'un moteur a combustion interne

Publications (1)

Publication Number Publication Date
EP1819922A1 true EP1819922A1 (fr) 2007-08-22

Family

ID=35945807

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05816541A Withdrawn EP1819922A1 (fr) 2004-11-30 2005-11-28 Piston en deux parties d'un moteur a combustion interne

Country Status (8)

Country Link
US (1) US20080121102A1 (fr)
EP (1) EP1819922A1 (fr)
JP (1) JP2008522089A (fr)
KR (1) KR20070085580A (fr)
CN (1) CN101189424A (fr)
BR (1) BRPI0518684A2 (fr)
DE (1) DE102004057625A1 (fr)
WO (1) WO2006058525A1 (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007050213A1 (de) * 2007-10-20 2009-04-23 Mahle International Gmbh Kolben für einen Verbrennungsmotor
DE102007061601A1 (de) * 2007-12-20 2009-06-25 Mahle International Gmbh Kolben für einen Verbrennungsmotor sowie Verfahren zu seiner Herstellung
US9970384B2 (en) 2009-11-06 2018-05-15 Federal-Mogul Llc Steel piston with cooling gallery and method of construction thereof
US8807109B2 (en) * 2009-11-06 2014-08-19 Federal-Mogul Corporation Steel piston with cooling gallery and method of construction thereof
DE102010015568A1 (de) * 2010-04-19 2011-10-20 Ks Kolbenschmidt Gmbh Kolbenoberteil eines gebauten oder geschweißten Kolbens mit erweiterten Kühlräumen
DE102010053925A1 (de) * 2010-12-09 2012-06-14 Mahle International Gmbh Kolben für einen Verbrennungsmotor und Verfahren zu seiner Herstellung
DE102011101005A1 (de) * 2011-04-20 2012-10-25 Daimler Ag Kolben für eine Hubkolben-Brennkraftmaschine
US20130025561A1 (en) * 2011-07-28 2013-01-31 Dieter Gabriel Bowl rim and root protection for aluminum pistons
JP6450911B2 (ja) 2013-03-13 2019-01-16 テネコ・インコーポレイテッドＴｅｎｎｅｃｏ Ｉｎｃ． ピストンおよびその作成方法
US10151269B2 (en) * 2016-06-16 2018-12-11 GM Global Technology Operations LLC Mass efficient piston
ES2800154T3 (es) * 2017-10-10 2020-12-28 Lombardini Srl Pistón y procedimiento de fabricación del mismo
US20190136792A1 (en) * 2017-11-09 2019-05-09 GM Global Technology Operations LLC Bimetallic piston heads including thermal insulation coatings
CN110469421A (zh) * 2018-05-11 2019-11-19 强莉莉 一种组合式活塞
CN113202654A (zh) * 2021-05-18 2021-08-03 大昌汽车部件(苏州)有限公司 一种组合式发动机活塞及其锻造工艺
DE102021207405A1 (de) * 2021-07-13 2023-01-19 Federal-Mogul Nürnberg GmbH Stahlkolben für einen Verbrennungsmotor

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7633479U1 (de) * 1976-10-26 1983-10-27 Mtu Motoren- Und Turbinen-Union Friedrichshafen Gmbh, 7990 Friedrichshafen Isolierter kolbenboden
DE3631279A1 (de) * 1986-09-13 1988-03-24 Kloeckner Humboldt Deutz Ag Kolben fuer eine verbrennungskraftmaschine

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DE133455C (fr) *
US2720193A (en) * 1950-03-24 1955-10-11 Maybach Karl Oil cooled piston for high speed internal combustion engines
FR2142146A5 (fr) * 1971-06-14 1973-01-26 Bechir Roger
US3923032A (en) * 1974-04-22 1975-12-02 Karl E Studenroth Chambered piston for an internal combustion engine
YU226580A (en) * 1979-09-08 1983-09-30 Massey Ferguson Perkins Ltd Piston for an internal combustion engine
US4548127A (en) * 1981-05-08 1985-10-22 Dunn Stephen J Piston for internal combustion engine
JPS60164648U (ja) * 1984-04-09 1985-11-01 三菱重工業株式会社 組立型断熱ピストン
GB8413800D0 (en) * 1984-05-30 1984-07-04 Ae Plc Manufacture of pistons
DE3625492A1 (de) * 1986-07-28 1988-02-04 Kloeckner Humboldt Deutz Ag Mehrteiliger kolben fuer eine brennkraftmaschine
JPS6357344U (fr) * 1986-09-30 1988-04-16
DE3637196A1 (de) * 1986-10-31 1988-05-19 Mtu Friedrichshafen Gmbh Oelgekuehlter kolben mit einer brennmulde fuer eine verbrennungskraftmaschine
US4932314A (en) * 1988-11-14 1990-06-12 Baris Scott L Segmented piston
US4898135A (en) * 1989-02-16 1990-02-06 Sonex Research, Inc. Piston and process for achieving controlled ignition and combustion of hydrocarbon fuels in internal combustion engines by generation and management of fuel radical species
US5322042A (en) * 1992-06-17 1994-06-21 Sonex Research, Inc. Combustion chamber for internal combustion engine and process of combustion using fuel radical species
DE4446726A1 (de) * 1994-12-24 1996-06-27 Mahle Gmbh Verfahren zur Herstellung eines einteiligen Kühlkanalkolbens
JP2001107803A (ja) * 1999-10-08 2001-04-17 Riken Tanzou Kk 内燃機関ピストンの製造方法
US6487773B2 (en) * 2001-03-23 2002-12-03 Mahle Gmbh Method of making one-piece piston
DE10244513A1 (de) * 2002-09-25 2004-04-08 Mahle Gmbh Mehrteiliger gekühlter Kolben für einen Verbrennungsmotor und Verfahren zu dessen Herstellung
DE10244511A1 (de) * 2002-09-25 2004-04-15 Mahle Gmbh Mehrteiliger gekühlter Kolben für einen Verbrennungsmotor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7633479U1 (de) * 1976-10-26 1983-10-27 Mtu Motoren- Und Turbinen-Union Friedrichshafen Gmbh, 7990 Friedrichshafen Isolierter kolbenboden
DE3631279A1 (de) * 1986-09-13 1988-03-24 Kloeckner Humboldt Deutz Ag Kolben fuer eine verbrennungskraftmaschine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2006058525A1 *

Also Published As

Publication number Publication date
US20080121102A1 (en) 2008-05-29
CN101189424A (zh) 2008-05-28
JP2008522089A (ja) 2008-06-26
KR20070085580A (ko) 2007-08-27
DE102004057625A1 (de) 2006-06-01
BRPI0518684A2 (pt) 2008-12-02
WO2006058525A1 (fr) 2006-06-08

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