DE2424882A1 - I.C. engine liquid cooled piston - is two part with cooling chamber separated from cooling channel by welded partition - Google Patents

I.C. engine liquid cooled piston - is two part with cooling chamber separated from cooling channel by welded partition

Info

Publication number
DE2424882A1
DE2424882A1 DE19742424882 DE2424882A DE2424882A1 DE 2424882 A1 DE2424882 A1 DE 2424882A1 DE 19742424882 DE19742424882 DE 19742424882 DE 2424882 A DE2424882 A DE 2424882A DE 2424882 A1 DE2424882 A1 DE 2424882A1
Authority
DE
Germany
Prior art keywords
piston
cooling
partition
liquid cooled
chamber separated
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
DE19742424882
Other languages
German (de)
Other versions
DE2424882C2 (en
Inventor
Rolf Dipl Ing Eckert
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.)
Kloeckner Humboldt Deutz AG
Original Assignee
Kloeckner Humboldt Deutz AG
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 Kloeckner Humboldt Deutz AG filed Critical Kloeckner Humboldt Deutz AG
Priority to DE2424882A priority Critical patent/DE2424882C2/en
Publication of DE2424882A1 publication Critical patent/DE2424882A1/en
Application granted granted Critical
Publication of DE2424882C2 publication Critical patent/DE2424882C2/en
Expired 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
    • F02B23/0675—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 the combustion space being substantially spherical, hemispherical, ellipsoid or parabolic
    • 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
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
    • F02B2275/14—Direct injection into combustion chamber
    • 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
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
    • 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
    • F02F3/003—Multi-part pistons the parts being connected by casting, brazing, welding or clamping
    • F02F2003/0061—Multi-part pistons the parts being connected by casting, brazing, welding or clamping by welding
    • 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

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)

Abstract

The combustion chamber is moulded in with the piston crown and surrounded by a closed cooling chamber (3) partly filled by a liquid cooling medium at working temperature and separated by a dividing wall (6) from an oil cooling annular chamber (6). The dividing wall is joined to the piston crown by two welding seams (8, 9) between the combustion chamber (2) and the piston edge (10). The lower end of the separating wall joins up with the piston as a press fit. Cooling oil is fed to the annular chamber via a diametrically opposite return channel (14). The usual piston ring grooves (15) and bearing support are provided.

Description

Kolben für Hubkolben-Brennkraftmaschinen Die Erfindung betrifft einen Kolben für Hubkolben-Brennkraftmaschinen mit einer Brennraummulde, die von einem geschlossenen, teilweise mit einem bei Betriebstemperatur flüssigen Kühlmedium gefüllten Kühlraum umgeben ist, der durch eine Trennwand von einem kühlölführenden, ringförmigen Kühlkanal getrennt ist. Pistons for reciprocating internal combustion engines The invention relates to a Pistons for reciprocating internal combustion engines with a combustion bowl, which is of a closed, partially filled with a cooling medium that is liquid at operating temperature Cooling space is surrounded by a partition wall of a cooling oil-carrying, annular Cooling channel is separated.

Ein derartiger Kolben ist durch die DL-PS 66 993 bekannt.Such a piston is known from DL-PS 66 993.

Durch die Zwischenschaltung eines bei Betriebs temperatur flüssigen Kühlmediums erreicht man beim Kaltstart, im Leerlauf und im Bereich geringer Teillast einen geringeren Wärmeübergang, so daß sich die Brennraumwandung schneller aufheizt und schnell eine für die Verbrennung günstige Temperatur erreicht. Bei Erreichen der Betriebstemperatur erhöht sich der Wrmeübergang' so daß die zulässige Höchsttemperatur an der Innenwand des Brennraumes nicht überschritten wird. Das geschilderte Temperaturverhalten wirkt sich günstig auf die Abgasqualität aus. Ferner wird eine Überhitzung des Kühlöls vermieden. Schwierigkeiten bestehen jedoch in der Fertigung eines solchen Kolbens.Through the interposition of a liquid at operating temperature Cooling medium is reached during a cold start, when idling and in the low partial load range a lower heat transfer, so that the combustion chamber wall heats up faster and quickly reaches a temperature favorable for combustion. Upon reaching the operating temperature increases the heat transfer 'so that the maximum permissible temperature on the inner wall of the combustion chamber is not exceeded. The described temperature behavior has a positive effect on the exhaust quality. Furthermore, there is overheating of the cooling oil avoided. However, difficulties exist in the manufacture of such a piston.

Der Erfindung liegt die Aufgabe zu Grunde, einen Kolben der eingangs beschriebenen Art so zu gestalten, daß er mit einfachen Mitteln gefertigt werden kann. Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Brennraummulde einstückig mit dem Kolben gegossen ist und die Trennwand am kolbenbodenseitigen Ende zwischen Brennraummulde und Kolbenrand in den Kolbenboden eingeschweißt ist, während sie am anderen Ende mit einem Preßsitz dichtend in den Kolbenboden eingefügt ist. Erfindungsgemäß besteht der Kolben nur aus zwei Teilen, die leicht hergestellt und zusammengefügt werden können.The invention is based on the object of a piston of the initially described type so that it can be manufactured with simple means can. This object is achieved according to the invention in that the combustion bowl is cast in one piece with the piston and the partition on the piston head side The end is welded into the piston crown between the combustion bowl and the piston rim, while at the other end it is inserted into the piston crown with a press fit is. According to the invention, the piston consists of only two parts that are easily made and can be put together.

In der Zeichnung ist ein Ausführungsbeispiel der Erfindung dargestellt. Die Abbildung zeigt einen Längsschnitt durch einen erfindungsgemäßen Kolben.An exemplary embodiment of the invention is shown in the drawing. The figure shows a longitudinal section through a piston according to the invention.

Der Kolben 1 weist eine angegossene Brennraummulde 2 auf, die von einem geschlossenen Kühlraum 3 umgeben ist. Dieser ist teilweise mit einem bei Betriebs temperatur flüssigen Kühlmedium 4 gefüllt und von einem kühlölführenden Ringraum 5 durch eine Trennwand 6 getrennt. Die Trennwand 6 ist an ihrem kolbenbodenseitigen Ende 7 durch zwei Schweißnähte 8 und 9 zwischen der Brennraummulde 2 und dem Kolbenrand 10 in den Kolbenboden eingeschweißt. Am anderen Ende 11 ist die Trennwand 6 mit Preßsitz dichtend in den Kolben 1 eingefügt.The piston 1 has a cast-on combustion bowl 2, which is of a closed cooling space 3 is surrounded. This is partly with an operating temperature liquid cooling medium 4 and filled by a cooling oil-carrying annulus 5 separated by a partition 6. The partition 6 is on its piston bottom side End 7 by two welds 8 and 9 between the combustion bowl 2 and the piston edge 10 welded into the piston crown. At the other end is 11 partition wall 6 inserted into the piston 1 with a press fit.

Kühlöl wird dem Ringraum S durch einen Kanal 13 zugeführt.Cooling oil is supplied to the annular space S through a channel 13.

Der Abfluß des Kühlöls erfolgt diametral zum Zufluß durch einen Kanal 14. Der Kolben hat ferner Nuten 15 zur Aufnahme von Kolbenringen, sowie ein Bolzenauge 16 zur Lagerung.The outflow of the cooling oil is diametrically opposed to the inflow through a channel 14. The piston also has grooves 15 for receiving piston rings and a bolt eye 16 for storage.

Claims (1)

Patentanspruch Claim Kolben für Hubkolben-Brennkraftmaschinen.mit einer Brennraummulde, die von einem geschlossenen, teilweise mit einem bei Betriebstemperatur flüssigen Kühlmedium gefüllten Kühlraum umgeben ist, der durch eine Trennwand von einem kÜhlölführenden, ringförmigen Kühlkanal getrennt ist, dadurch gekennzeichnet, daß die Brennraummulde (2) mit dem Kolben (1) einstückig gegossen ist und die Trennwand (\6) am kolbenbodenseitigen Ende (7) zwischen Brennraummulde (2) und Kolbenrand (10) in den Kolbenboden eingeschweißt ist, während sie am anderen Ende (11) mit einem Preßsitz dichtend in den Kolben (1) eingefügt ist.Pistons for reciprocating internal combustion engines with a combustion bowl, that of a closed, partially with a liquid at operating temperature Cooling medium-filled cooling space is surrounded, which is surrounded by a partition wall of a cooling oil-carrying, annular cooling channel is separated, characterized in that the combustion bowl (2) is cast in one piece with the piston (1) and the partition (\ 6) on the piston head side The end (7) is welded into the piston crown between the combustion bowl (2) and the edge of the piston (10) is, while at the other end (11) with a press fit sealing in the piston (1) is inserted.
DE2424882A 1974-05-22 1974-05-22 Pistons for reciprocating internal combustion engines Expired DE2424882C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE2424882A DE2424882C2 (en) 1974-05-22 1974-05-22 Pistons for reciprocating internal combustion engines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2424882A DE2424882C2 (en) 1974-05-22 1974-05-22 Pistons for reciprocating internal combustion engines

Publications (2)

Publication Number Publication Date
DE2424882A1 true DE2424882A1 (en) 1975-12-04
DE2424882C2 DE2424882C2 (en) 1983-10-20

Family

ID=5916249

Family Applications (1)

Application Number Title Priority Date Filing Date
DE2424882A Expired DE2424882C2 (en) 1974-05-22 1974-05-22 Pistons for reciprocating internal combustion engines

Country Status (1)

Country Link
DE (1) DE2424882C2 (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4175502A (en) * 1977-05-25 1979-11-27 Karl Schmidt Gmbh Liquid-cooled, assembled piston for internal combustion engines
DE2828237A1 (en) * 1978-06-28 1980-01-03 Kloeckner Humboldt Deutz Ag PISTON PISTON ENGINE
DE3032671A1 (en) * 1980-08-29 1982-03-18 Alcan Aluminiumwerk Nürnberg GmbH, 6000 Frankfurt Cooled IC engine piston - has pressed steel main body and heat-resistant e.g. steel top welded on in annular cooling chamber area
EP0167976A2 (en) * 1984-07-09 1986-01-15 Klöckner-Humboldt-Deutz Aktiengesellschaft Internal combustion engine with a piston- and an internal cylinder wall cooling
WO2006015585A1 (en) * 2004-08-11 2006-02-16 Mahle International Gmbh Cooling duct piston for an internal combustion engine comprising heat pipes
WO2013119898A1 (en) * 2012-02-10 2013-08-15 Federal-Mogul Corporation Piston with supplemental cooling gallery and internal combustion engine therewith
DE102012014200A1 (en) * 2012-07-18 2014-05-15 Mahle International Gmbh Piston for internal combustion engine, has cavity that is made of low melting metal or metal alloy and is provided adjacent to combustion bowl, for receiving coolant in circulating cooling passage of piston head
WO2016173690A1 (en) * 2015-04-29 2016-11-03 Daimler Ag Piston for a reciprocating piston internal combustion engine
DE102019213953A1 (en) * 2019-09-12 2021-03-18 Mahle International Gmbh Pistons for an internal combustion engine
DE102019215486A1 (en) * 2019-10-09 2021-04-15 Mahle International Gmbh Pistons for an internal combustion engine

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1814123A1 (en) * 1968-12-12 1971-03-11 Maschf Augsburg Nuernberg Ag Method and device for cooling an internal combustion engine piston
DE7238717U (en) * 1973-03-29 Schmidt K Gmbh Light metal plungers for internal combustion engines

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7238717U (en) * 1973-03-29 Schmidt K Gmbh Light metal plungers for internal combustion engines
DE1814123A1 (en) * 1968-12-12 1971-03-11 Maschf Augsburg Nuernberg Ag Method and device for cooling an internal combustion engine piston

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4175502A (en) * 1977-05-25 1979-11-27 Karl Schmidt Gmbh Liquid-cooled, assembled piston for internal combustion engines
DE2828237A1 (en) * 1978-06-28 1980-01-03 Kloeckner Humboldt Deutz Ag PISTON PISTON ENGINE
DE3032671A1 (en) * 1980-08-29 1982-03-18 Alcan Aluminiumwerk Nürnberg GmbH, 6000 Frankfurt Cooled IC engine piston - has pressed steel main body and heat-resistant e.g. steel top welded on in annular cooling chamber area
EP0167976A2 (en) * 1984-07-09 1986-01-15 Klöckner-Humboldt-Deutz Aktiengesellschaft Internal combustion engine with a piston- and an internal cylinder wall cooling
EP0167976A3 (en) * 1984-07-09 1987-01-07 Klockner-Humboldt-Deutz Aktiengesellschaft Cylinder tube cooling
WO2006015585A1 (en) * 2004-08-11 2006-02-16 Mahle International Gmbh Cooling duct piston for an internal combustion engine comprising heat pipes
US7603977B2 (en) 2004-08-11 2009-10-20 Mahle International Gmbh Cooling duct piston for an internal combustion engine comprising heat pipes
WO2013119898A1 (en) * 2012-02-10 2013-08-15 Federal-Mogul Corporation Piston with supplemental cooling gallery and internal combustion engine therewith
US8662026B2 (en) 2012-02-10 2014-03-04 Federal-Mogul Corporation Piston with supplemental cooling gallery and internal combustion engine therewith
DE102012014200A1 (en) * 2012-07-18 2014-05-15 Mahle International Gmbh Piston for internal combustion engine, has cavity that is made of low melting metal or metal alloy and is provided adjacent to combustion bowl, for receiving coolant in circulating cooling passage of piston head
WO2016173690A1 (en) * 2015-04-29 2016-11-03 Daimler Ag Piston for a reciprocating piston internal combustion engine
DE102019213953A1 (en) * 2019-09-12 2021-03-18 Mahle International Gmbh Pistons for an internal combustion engine
DE102019215486A1 (en) * 2019-10-09 2021-04-15 Mahle International Gmbh Pistons for an internal combustion engine

Also Published As

Publication number Publication date
DE2424882C2 (en) 1983-10-20

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OD Request for examination
D2 Grant after examination
8364 No opposition during term of opposition
8320 Willingness to grant licences declared (paragraph 23)
8339 Ceased/non-payment of the annual fee