DE1122325B - Light metal pistons for internal combustion engines with a combustion chamber provided in the piston crown - Google Patents
Light metal pistons for internal combustion engines with a combustion chamber provided in the piston crownInfo
- Publication number
- DE1122325B DE1122325B DEM39820A DEM0039820A DE1122325B DE 1122325 B DE1122325 B DE 1122325B DE M39820 A DEM39820 A DE M39820A DE M0039820 A DEM0039820 A DE M0039820A DE 1122325 B DE1122325 B DE 1122325B
- Authority
- DE
- Germany
- Prior art keywords
- light metal
- piston
- reinforcement
- combustion chamber
- 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.)
- Pending
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
- F02B23/0603—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 at least part of the interior volume or the wall of the combustion space being made of material different from the surrounding piston part, e.g. combustion space formed within a ceramic part fixed to a metal piston head
-
- 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
- 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
- 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
- F02B23/0678—Unconventional, complex or non-rotationally symmetrical shapes of the combustion space, e.g. flower like, having special shapes related to the orientation of the fuel spray jets
- F02B23/0693—Unconventional, complex or non-rotationally symmetrical shapes of the combustion space, e.g. flower like, having special shapes related to the orientation of the fuel spray jets the combustion space consisting of step-wise widened multiple zones of different depth
-
- 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
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2201/00—Metals
- F05C2201/02—Light metals
- F05C2201/021—Aluminium
-
- 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)
- Ceramic Engineering (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Description
Leichtmetallkolben für Brennkraftmaschinen mit einem im Kolbenboden vorgesehenen Brennraum Die Erfindung betrifft einen Leichtmetallkolben für Brennkraftmaschinen mit einem im Kolbenboden vorgesehenen Brennraum, dessen Mündungsrand eine aus einem andersgearteten Werkstoff als dem Kolbenwerkstoff bestehende Bewehrung aufweist.Light metal pistons for internal combustion engines with one in the piston crown provided combustion chamber The invention relates to a light metal piston for internal combustion engines with a combustion chamber provided in the piston crown, the mouth edge of which is one of a has different types of material than the piston material existing reinforcement.
Um einen wirksamen Schutz der thermisch hoch beanspruchten Brennraum-Mündungsränder solcher Kolben zu erzielen, hat man bisher vielfach geglaubt, zur Bewehrung Metalle von größerer Härte als der des Kolbenwerkstoffes, insbesondere Gußeisen, verwenden zu müssen. Dadurch ergeben sich aber Schwierigkeiten hinsichtlich der betriebssicheren Verankerung solcher Bewehrungen im Kolbenkörper, und zwar insbesondere dann, wenn die Bewehrungen spezifisch schwerer sind als der Kolbenwerkstoff und wenn die Kolben zum Einbau in Brennkraftmaschinen mit großen Drehzahlen bestimmt sind.To effectively protect the thermally highly stressed combustion chamber opening edges To achieve such a piston, it has been widely believed until now, for reinforcement metals Use harder than the piston material, especially cast iron to have to. However, this gives rise to difficulties with regard to the operationally reliable Anchoring such reinforcements in the piston body, especially when the reinforcements are specifically heavier than the piston material and if the piston are intended for installation in internal combustion engines with high speeds.
Gemäß der Erfindung wird eine diesen Nachteil nicht aufweisende Bewehrung der Brennraum-Mündungsränder an Kolben der eingangs erwähnten Art dadurch erreicht, daß sie aus Reinaluminium besteht. Versuche haben ergeben, daß durch derartige Bewehrungen das Auftreten bei hochbeanspruchten Leichtmetallkolben aus den üblichen meist hochsiliziumhaltigen Legierungen gelegentlich beobachteter Spannungsrisse an den Mündungsrändern vermieden werden kann, was in erster Linie darauf zurückzuführen sein wird, daß die erheblich bessere Wärmeleitfähigkeit des verwendeten Bewehrungswerkstoffes eine merkliche thermische Entlastung der gefährdeten Zonen und damit auch eine Verminderung der auftretenden Wärmespannungen mit sich bringt.According to the invention, there is a reinforcement that does not have this disadvantage the combustion chamber opening edges on pistons of the type mentioned are achieved by that it is made of pure aluminum. Tests have shown that by such reinforcements the occurrence in highly stressed light metal pistons made of the usual, mostly high-silicon pistons Alloys occasionally observed stress cracks at the mouth edges avoided can be, which will primarily be due to the fact that the substantial better thermal conductivity of the reinforcement material used a noticeable thermal relief of the endangered zones and thus also a reduction in the occurring thermal stress brings with it.
Die Erkenntnis, daß man durch Erhöhung der Wärmeleitfähigkeit des den Mündungsrand des Brennraumes bewehrenden Werkstoffes den gefürchteten Wärmerissen entgegenwirken kann, ist allerdings nicht mehr neu. Und zwar hat man für diesen Zweck bereits als Bewehrung eine Leichtmetall-Knetlegierung angewandt, durch deren besonders dichtes Gefüge sowie die Ausrichtung des Faserverlaufes man sich eine verbesserte Wärmeableitung von der hochbeanspruchten Brennraumkante versprach.The realization that by increasing the thermal conductivity of the the edge of the mouth of the combustion chamber reinforcing the dreaded heat cracks can counteract this, however, is no longer new. And you have for this one Purpose already applied a light metal wrought alloy as reinforcement, through their a particularly dense structure as well as the alignment of the fiber orientation is one promised improved heat dissipation from the highly stressed edge of the combustion chamber.
Die Erfindung geht jedoch über dieses Ziel hinaus, da durch die nunmehr vorgeschlagene Verwendung einer aus Reinaluminium bestehenden Brennraumkantenbewehrung stärker ins Gewicht fallende Gewinne an abgeleiteter Wärme möglich werden. Unterstützt wird der Erfindungszweck, nämlich die Vermeidung von Schäden an der Brennraumkante, auch noch dadurch, daß das Reinaluminium einen höheren Schmelzpunkt und größere Dehnung besitzt als der üblicherweise verwendete Kolbenwerkstoff. Unter »Reinaluminium« ist ein Werkstoff mit mindestens 99,5% Aluminiumanteil zu verstehen. Werkstoffe mit geringerem Aluminiumanteil als die angegebene Ziffer scheiden für das gesamte Schutzbegehren aus.However, the invention goes beyond this goal, as by now proposed use of a combustion chamber edge reinforcement made of pure aluminum more significant gains in dissipated heat become possible. Supports the purpose of the invention, namely the avoidance of damage to the edge of the combustion chamber, also because the pure aluminum has a higher melting point and greater Elongation is the most commonly used piston material. Under "pure aluminum" a material with at least 99.5% aluminum is to be understood. Materials with a lower proportion of aluminum than the specified figure separate for the whole Protection request.
Vorzugsweise werden die erfindungsgemäß aus reinem Aluminium zu bildenden Bewehrungen mit dem Kolbenkörper molekular verbunden. Beispielsweise kann man sie in bekannter Weise durch Auftragsschweißung oder im sogenannten Verbundgießverfahren aufbringen.Preferably those to be formed according to the invention from pure aluminum are used Reinforcements are molecularly connected to the piston body. For example, you can in a known manner by build-up welding or in the so-called composite casting process raise.
In der Zeichnung ist zur Veranschaulichung des Erfindungsgegenstandes ein Ausschnitt aus einem Kolben 1 dargestellt, in dessen Kopf ein Brennraum 2 ausgespart ist. Der Kolben besteht aus einem üblichen Kolbenwerkstoff, z. B. einer eutektischen oder übereutektischen Aluminium-Silizium-Legierung. Der Mündungsrand 3 des Brennraumes 2 ist dagegen in dem durch engere Schraffur kenntlich gemachten Bereich aus Reinaluminium gebildet.In the drawing is to illustrate the subject of the invention a section of a piston 1 is shown, in the head of which a combustion chamber 2 is recessed is. The piston consists of a common piston material, e.g. B. a eutectic or hypereutectic aluminum-silicon alloy. The mouth edge 3 of the combustion chamber 2, on the other hand, is made of pure aluminum in the area identified by narrower hatching educated.
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEM39820A DE1122325B (en) | 1958-12-02 | 1958-12-02 | Light metal pistons for internal combustion engines with a combustion chamber provided in the piston crown |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEM39820A DE1122325B (en) | 1958-12-02 | 1958-12-02 | Light metal pistons for internal combustion engines with a combustion chamber provided in the piston crown |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1122325B true DE1122325B (en) | 1962-01-18 |
Family
ID=7303513
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEM39820A Pending DE1122325B (en) | 1958-12-02 | 1958-12-02 | Light metal pistons for internal combustion engines with a combustion chamber provided in the piston crown |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE1122325B (en) |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3730163A (en) * | 1970-04-07 | 1973-05-01 | Maschf Augsburg Nuernberg Ag | Piston for injection type internal combustion engines |
US3933143A (en) * | 1973-05-30 | 1976-01-20 | Mahle Gmbh | Combustion chamber protection means |
WO1988002813A1 (en) * | 1986-10-20 | 1988-04-21 | Elsbett L | Stepped design of a trough-shaped combustion chamber in the piston |
DE4141437C1 (en) * | 1991-12-16 | 1992-12-03 | Volkswagen Ag, 3180 Wolfsburg, De | Light metal cylinder head for internal combustion engine - mfd. using mandrel with characteristics of aluminium@-silicon@-magnesium@ casting |
DE19902864A1 (en) * | 1999-01-25 | 2000-06-29 | Daimler Chrysler Ag | Piston for IC engines with direct fuel injection has piston head cavity with collar partially formed by spray coating with a metal alloy for increased strength and temperature resistance |
DE10029810A1 (en) * | 2000-06-16 | 2001-12-20 | Mahle Gmbh | Piston for diesel engine; has steel base with combustion mould and has thermal sprayed NiCrAl, CoCrAl or FeCrAl alloy coating, which is thicker at mould edge |
WO2004057167A1 (en) | 2002-12-19 | 2004-07-08 | Avl List Gmbh | Method for operating a direct-injection diesel engine |
WO2004057168A1 (en) | 2002-12-19 | 2004-07-08 | Avl List Gmbh | Method for operating a direct-injection diesel engine |
EP1464821A1 (en) * | 2003-04-03 | 2004-10-06 | Federal-Mogul Nürnberg GmbH | Piston for an internal combustion engine and method for producing the piston |
WO2005046925A1 (en) * | 2003-11-15 | 2005-05-26 | Daimlerchrysler Ag | Internal combustion engine component and method for the production thereof |
US7415963B2 (en) | 2003-10-09 | 2008-08-26 | Avl List Gmbh | Method for operating an internal combustion engine |
DE10392141B4 (en) * | 2002-06-28 | 2011-11-24 | Cummins Inc. | Piston for internal combustion engine |
DE102011083994A1 (en) | 2010-10-05 | 2012-04-05 | Ks Kolbenschmidt Gmbh | Improvements to a combustion bowl rim and to a combustion bowl bottom of a piston of an internal combustion engine |
WO2013144072A1 (en) * | 2012-03-28 | 2013-10-03 | Mahle International Gmbh | Method for producing an aluminum piston |
EP2865864A1 (en) * | 2013-10-24 | 2015-04-29 | FPT Motorenforschung AG | Engine piston with a low heat transfer combustion chamber embedded therein |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE748567C (en) * | 1942-06-06 | 1944-11-04 | Process for the production of cast light metal pistons | |
DE869570C (en) * | 1948-10-01 | 1954-03-08 | Maschf Augsburg Nuernberg Ag | Pistons for internal combustion engines |
DE1043709B (en) * | 1957-12-09 | 1958-11-13 | Krauss Maffei Ag | Fluid-cooled cylinder head designed as a hollow body for internal combustion engines, especially two-stroke diesel engines |
-
1958
- 1958-12-02 DE DEM39820A patent/DE1122325B/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE748567C (en) * | 1942-06-06 | 1944-11-04 | Process for the production of cast light metal pistons | |
DE869570C (en) * | 1948-10-01 | 1954-03-08 | Maschf Augsburg Nuernberg Ag | Pistons for internal combustion engines |
DE1043709B (en) * | 1957-12-09 | 1958-11-13 | Krauss Maffei Ag | Fluid-cooled cylinder head designed as a hollow body for internal combustion engines, especially two-stroke diesel engines |
Cited By (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3730163A (en) * | 1970-04-07 | 1973-05-01 | Maschf Augsburg Nuernberg Ag | Piston for injection type internal combustion engines |
US3933143A (en) * | 1973-05-30 | 1976-01-20 | Mahle Gmbh | Combustion chamber protection means |
WO1988002813A1 (en) * | 1986-10-20 | 1988-04-21 | Elsbett L | Stepped design of a trough-shaped combustion chamber in the piston |
DE4141437C1 (en) * | 1991-12-16 | 1992-12-03 | Volkswagen Ag, 3180 Wolfsburg, De | Light metal cylinder head for internal combustion engine - mfd. using mandrel with characteristics of aluminium@-silicon@-magnesium@ casting |
DE19902864A1 (en) * | 1999-01-25 | 2000-06-29 | Daimler Chrysler Ag | Piston for IC engines with direct fuel injection has piston head cavity with collar partially formed by spray coating with a metal alloy for increased strength and temperature resistance |
US6877473B2 (en) | 2000-06-16 | 2005-04-12 | Mahle Gmbh | Diesel engine piston |
DE10029810A1 (en) * | 2000-06-16 | 2001-12-20 | Mahle Gmbh | Piston for diesel engine; has steel base with combustion mould and has thermal sprayed NiCrAl, CoCrAl or FeCrAl alloy coating, which is thicker at mould edge |
DE10392141B4 (en) * | 2002-06-28 | 2011-11-24 | Cummins Inc. | Piston for internal combustion engine |
WO2004057167A1 (en) | 2002-12-19 | 2004-07-08 | Avl List Gmbh | Method for operating a direct-injection diesel engine |
DE10393905B4 (en) * | 2002-12-19 | 2016-09-15 | Avl List Gmbh | Method for operating a direct-injection diesel internal combustion engine |
WO2004057168A1 (en) | 2002-12-19 | 2004-07-08 | Avl List Gmbh | Method for operating a direct-injection diesel engine |
CN100404814C (en) * | 2002-12-19 | 2008-07-23 | Avl里斯脱有限公司 | Method of operating directly injecting diesel engine |
DE10315232A1 (en) * | 2003-04-03 | 2004-10-28 | Federal-Mogul Nürnberg GmbH | Pistons for an internal combustion engine and method for producing a piston |
EP1464821A1 (en) * | 2003-04-03 | 2004-10-06 | Federal-Mogul Nürnberg GmbH | Piston for an internal combustion engine and method for producing the piston |
US7415963B2 (en) | 2003-10-09 | 2008-08-26 | Avl List Gmbh | Method for operating an internal combustion engine |
DE10353474A1 (en) * | 2003-11-15 | 2005-06-23 | Daimlerchrysler Ag | Component of an internal combustion engine and method for its production |
US7770291B2 (en) | 2003-11-15 | 2010-08-10 | Daimler Ag | Internal combustion engine component and method for the production thereof |
DE10353474B4 (en) * | 2003-11-15 | 2007-02-22 | Daimlerchrysler Ag | Component of an internal combustion engine and method for its production |
WO2005046925A1 (en) * | 2003-11-15 | 2005-05-26 | Daimlerchrysler Ag | Internal combustion engine component and method for the production thereof |
DE102011083994A1 (en) | 2010-10-05 | 2012-04-05 | Ks Kolbenschmidt Gmbh | Improvements to a combustion bowl rim and to a combustion bowl bottom of a piston of an internal combustion engine |
WO2012045443A1 (en) | 2010-10-05 | 2012-04-12 | Ks Kolbenschmidt Gmbh | Improvements of a combustion-chamber bowl rim and of a combustion-chamber bowl base of a piston of an internal combustion engine |
WO2013144072A1 (en) * | 2012-03-28 | 2013-10-03 | Mahle International Gmbh | Method for producing an aluminum piston |
CN104185529A (en) * | 2012-03-28 | 2014-12-03 | 马勒国际有限公司 | Method for producing an aluminum piston |
CN104185529B (en) * | 2012-03-28 | 2017-03-01 | 马勒国际有限公司 | Method for producing aluminum piston |
EP2865864A1 (en) * | 2013-10-24 | 2015-04-29 | FPT Motorenforschung AG | Engine piston with a low heat transfer combustion chamber embedded therein |
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