EP1099845A2 - Piston avec une connexion entre un conduit de refroidissement et un alésage d'un axe de piston - Google Patents

Piston avec une connexion entre un conduit de refroidissement et un alésage d'un axe de piston Download PDF

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Publication number
EP1099845A2
EP1099845A2 EP00120969A EP00120969A EP1099845A2 EP 1099845 A2 EP1099845 A2 EP 1099845A2 EP 00120969 A EP00120969 A EP 00120969A EP 00120969 A EP00120969 A EP 00120969A EP 1099845 A2 EP1099845 A2 EP 1099845A2
Authority
EP
European Patent Office
Prior art keywords
piston
pin bore
connection
piston pin
cooling channel
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Withdrawn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
EP00120969A
Other languages
German (de)
English (en)
Other versions
EP1099845A3 (fr
Inventor
Norbert Dr. Wellmann
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.)
KS Kolbenschmidt GmbH
Original Assignee
KS Kolbenschmidt 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 KS Kolbenschmidt GmbH filed Critical KS Kolbenschmidt GmbH
Publication of EP1099845A2 publication Critical patent/EP1099845A2/fr
Publication of EP1099845A3 publication Critical patent/EP1099845A3/fr
Withdrawn legal-status Critical Current

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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 
    • F02F3/16—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C21/00—Flasks; Accessories therefor
    • B22C21/12—Accessories
    • B22C21/14—Accessories for reinforcing or securing moulding materials or cores, e.g. gaggers, chaplets, pins, bars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/10—Cores; Manufacture or installation of cores
    • B22C9/105—Salt cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/10—Cores; Manufacture or installation of cores
    • B22C9/108—Installation of cores
    • 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
    • F02F2200/00—Manufacturing
    • F02F2200/06—Casting

Definitions

  • the invention relates to a piston, in particular a piston for internal combustion engines, according to the features of the preamble of claim 1.
  • Such a piston is known from the American patent US 4,907,545. That piston has a piston pin bore that receives a piston pin, the piston is connected to a connecting rod via the piston pin.
  • the invention is therefore based on the object, the failure of the piston when exceeded to avoid critical load values in the area of the piston pin bore, so that consequential damage cannot occur.
  • the cooling duct is connected to the piston pin bore via at least one connection connected. Via this connection, the cooling medium that is inside the Piston gets into the cooling channel, also get into the piston pin bore, so that this Piston pin bore with the piston pin inside is also cooled and lubricated becomes. Lubrication initially reduces friction and then also a seizure and wear of the surface pressure between the piston pin and Piston pin bore avoided.
  • the main advantages of the invention are thus avoidance of bolt seizures or bolt grinders as well as basically avoiding bore wear. It also reduces friction, resulting in lower fuel consumption and noise reduction results. Overall, there is a higher resilient piston, so that the combustion temperatures with regard to the combustion and exhaust gas quality and combustion pressures can be raised further.
  • the at least one connection is after the piston has been produced can be produced in particular by drilling.
  • This has the advantage that it is already finished Pistons or the tools for pistons, especially the molds, unchanged can stay. It is only necessary after manufacture of the piston, at least to introduce a connection between the cooling channel and the piston pin bore. Drilling is a particularly simple option, but this is not the only one Possibility is, but also other are conceivable.
  • the at least one connection is during casting of the piston can be produced using a mold body.
  • Corresponding moldings are for this (for example salt cores) which are removed (rinsed) after the casting process must, so that the at least one connection between the cooling channel and the piston pin bore is released.
  • a pin bore bushing is in the piston pin bore used.
  • the invention thus advantageously also works with such pistons, where the piston pin is inserted into the piston pin bore via a pin bore bushing is inserted.
  • This construction also has the advantages already mentioned.
  • the at least one connection is perpendicular or inclined aligned with an axis of the piston pin bore. So there are two different designs Alignments for the at least one connection are available, including one Combination of the two orientations mentioned is conceivable. Because of this alignment can the connection meet the geometric boundary conditions (especially with regard to to the strength values of the piston) and other requirements. The same also applies to the diameter and the number of connections. In in this context it should be noted that the at least one connection or several connections are arranged in such places in the piston, through which the strength of the piston is not affected.
  • FIG. 1 shows a piston 1 as used in internal combustion engines, in particular diesel engines Vehicles.
  • the piston 1 points in the direction of the combustion chamber side a ring field 2 known per se. There is still a combustion chamber trough in this area 3 arranged, the geometric shape is shown here only as an example.
  • the piston 1 has a piston pin bore 4 which is perpendicular to the main axis or perpendicular to the piston stroke movement axis.
  • the piston pin bore 4 takes a piston pin 5, with the piston pin 5 and the piston pin bore 4 having a positive fit Form a connection.
  • the piston pin 5 transmits the forces to a connecting rod, which in Figure 1 is shown only schematically.
  • a circumferential cooling channel 6 is arranged inside the ring field 2 and outside the combustion chamber trough 3 is in the upper area of the piston 1, a circumferential cooling channel 6 is arranged.
  • This cooling channel 6 (cavity cooling channel) is used for internal cooling of the piston 1 with a cooling medium, usually engine oil, filled, which is injected into the interior of the piston 1.
  • a cooling medium usually engine oil, filled, which is injected into the interior of the piston 1.
  • This a connection 7 or too several connections 7 have the purpose that the cooling medium from the cooling channel 6 in preferred amount in the piston pin bore 4, that is, in the operation of the internal combustion engine between piston pin bore 4 and piston pin 5 flows to improve the To contribute lubrication and cooling in this area.
  • connection 7 The arrangement, the length as well the diameter of the connection 7 is with regard to the position of the cooling channel 6 and Adjust the piston pin bore 4 in such a way that in particular the strength of the piston 1 preserved. Is this connection 7 or by several connections 7 the strength of the piston 1 is not affected, is yet another advantage of the invention Connections 7 to see that this saves weight.
  • FIG. 1 shows that the one connection 7 (when viewing FIG. 1 the left connection) obliquely to the main axis or to the piston stroke movement axis from the cooling channel 6 runs in the direction of the piston pin bore 4, while when viewing FIG right connection 7 runs perpendicular to this piston stroke movement axis.
  • Alternative to The arrangement of the connections 7 shown in FIG. 1 can also have multiple connections 7 be provided over the longitudinal extent of the piston pin bore 4 such that several connections 7, starting from the cooling channel 6, in the direction of the piston pin bore 4 extend in a star shape.
  • a piston 1 is shown in FIG of the ring field 2 connects and on the other hand in the piston pin bore 4 a piston pin bore bushing 8 is inserted.
  • connection 7 or even several connections 7 independently of the position and the geometric configuration of the cooling channel 6 are used can to the cooling medium from the cooling channel 6 in the direction of the piston pin bore 4th to transport.
  • the cooling duct 6 can be located in an area between the piston pin bore 4 and a piston combustion chamber surface 9. He also does not have to go around the combustion chamber trough 3 run, but can also have other geometric shapes.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
EP00120969A 1999-11-12 2000-09-27 Piston avec une connexion entre un conduit de refroidissement et un alésage d'un axe de piston Withdrawn EP1099845A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19954725 1999-11-12
DE1999154725 DE19954725A1 (de) 1999-11-12 1999-11-12 Kolben mit einer Verbindung von einem Kühlkanal zu einer Kolbenbolzenbohrung

Publications (2)

Publication Number Publication Date
EP1099845A2 true EP1099845A2 (fr) 2001-05-16
EP1099845A3 EP1099845A3 (fr) 2002-02-13

Family

ID=7928987

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00120969A Withdrawn EP1099845A3 (fr) 1999-11-12 2000-09-27 Piston avec une connexion entre un conduit de refroidissement et un alésage d'un axe de piston

Country Status (2)

Country Link
EP (1) EP1099845A3 (fr)
DE (1) DE19954725A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012055964A1 (fr) * 2010-10-29 2012-05-03 Federal-Mogul Nürnberg GmbH Piston pour un moteur à combustion interne
EP3502452A1 (fr) * 2017-12-21 2019-06-26 MAN Truck & Bus AG Piston pour un moteur à combustion interne à piston alternatif

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10100955A1 (de) * 2001-01-11 2002-07-18 Mahle Gmbh Verfahren zur Herstellung eines Ringträgers mit angeschweißtem Blechkühlkanal
DE10227372B4 (de) * 2002-06-20 2005-09-01 Ks Kolbenschmidt Gmbh Kolben mit einer Ausnehmung zur Aufnahme von einem Schmiermittel
DE10259098A1 (de) * 2002-12-18 2004-07-15 Ks Kolbenschmidt Gmbh Verfahren zur Herstellung eines Kühlkanalkolbens
DE102005061075A1 (de) 2005-12-21 2007-06-28 Mahle International Gmbh Kolben für einen Verbrennungsmotor und Verfahren zu dessen Herstellung
DE102017130691A1 (de) 2017-12-20 2019-06-27 Man Truck & Bus Ag Vorrichtung zum Schmieren eines Pleuellagers

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4907545A (en) 1988-12-28 1990-03-13 Caterpillar Inc. Liquid cooled piston ring carrier assembly and piston using same

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2369906A (en) * 1941-12-29 1945-02-20 Aluminum Co Of America Engine cooled piston
US2407429A (en) * 1944-05-19 1946-09-10 Fairbanks Morse & Co Wrist pin assembly
CH352529A (de) * 1956-07-14 1961-02-28 Mahle Kg Thermisch beanspruchter Brennkraftmaschinenteil aus Leichtmetall mit kreisförmigem Querschnitt und von seiner Wandung umschlossenen Ringkanal
DE1141494B (de) * 1960-03-19 1962-12-20 Karl Schmidt Ges Mit Beschraen Gekuehlter Kolben fuer Brennkraftmaschinen, vorzugsweise aus Leichtmetall
US3215130A (en) * 1963-08-30 1965-11-02 Mahle Kg Multipart oil cooled internal combustion engine piston
SE422979B (sv) * 1978-09-06 1982-04-05 Bofors Ab Flytande kolvtapp till forbrenningsmotor med oljekyld kolv
DE4040611A1 (de) * 1990-12-19 1992-07-02 Man B & W Diesel Ag Jet-kolbenkuehlung
DE4135237A1 (de) * 1991-10-25 1993-04-29 Mak Maschinenbau Krupp Kolben-pleuel-anordnung
DE19834138C1 (de) * 1998-07-29 1999-11-11 Daimler Chrysler Ag Brennkraftmaschine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4907545A (en) 1988-12-28 1990-03-13 Caterpillar Inc. Liquid cooled piston ring carrier assembly and piston using same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012055964A1 (fr) * 2010-10-29 2012-05-03 Federal-Mogul Nürnberg GmbH Piston pour un moteur à combustion interne
EP3502452A1 (fr) * 2017-12-21 2019-06-26 MAN Truck & Bus AG Piston pour un moteur à combustion interne à piston alternatif
DE102017130962A1 (de) * 2017-12-21 2019-06-27 Man Truck & Bus Ag Kolben für eine Hubkolben-Verbrennungskraftmaschine

Also Published As

Publication number Publication date
DE19954725A1 (de) 2001-05-23
EP1099845A3 (fr) 2002-02-13

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