DE3032671A1 - Cooled IC engine piston - has pressed steel main body and heat-resistant e.g. steel top welded on in annular cooling chamber area - Google Patents
Cooled IC engine piston - has pressed steel main body and heat-resistant e.g. steel top welded on in annular cooling chamber areaInfo
- Publication number
- DE3032671A1 DE3032671A1 DE19803032671 DE3032671A DE3032671A1 DE 3032671 A1 DE3032671 A1 DE 3032671A1 DE 19803032671 DE19803032671 DE 19803032671 DE 3032671 A DE3032671 A DE 3032671A DE 3032671 A1 DE3032671 A1 DE 3032671A1
- Authority
- DE
- Germany
- Prior art keywords
- piston
- channel
- cooling channel
- partition
- cooling
- 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
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
- F02F3/16—Pistons having cooling means
- F02F3/18—Pistons having cooling means the means being a liquid or solid coolant, e.g. sodium, in a closed chamber in piston
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- 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
-
- 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
- F02F3/0015—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
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- 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
- F05C2201/04—Heavy metals
- F05C2201/0433—Iron group; Ferrous alloys, e.g. steel
- F05C2201/0448—Steel
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
Description
Kolben für Brennkraftmaschinen Pistons for internal combustion engines
Die Erfindung betrifft einen Kolben für Brennkraftmaschinen mit einem Kühlkanal für die Kolbenkühlung in der Nähe der Kolbenringnuten im Kolbenkörper und einer Kolbenbodenplatte als Kolbenoberteil aus warmfestem Stahl oder einem anderen hochhitzebeständigen Material.The invention relates to a piston for internal combustion engines with a Cooling channel for piston cooling near the piston ring grooves in the piston body and a piston head plate as a piston top made of heat-resistant steel or another high temperature resistant material.
Ganz aus Leichtmetall bestehende Kolben sind in der Regel für extreme Belastungen, insbesondere in hochaufgeladenen Dieselmotoren, nicht geeignet. Dies gilt insbesondere für den dem Brennraum zugewandten oberen Teil des Kolbens. Aus diesem Grunde sind bereits sogenannte gebaute Kolben bekannt, bei welchen das Kolbenoberteil aus warmfestem Stahl oder einem anderen hochhitzebeständigen Material besteht, während der Kolbenunterteil aus Leichtmetall gebildet ist.Pistons made entirely of light metal are usually for extreme applications Loads, especially in highly charged diesel engines, not suitable. this applies in particular to the upper part of the piston facing the combustion chamber. the end For this reason, so-called built pistons are already known in which the piston upper part made of heat-resistant steel or another highly heat-resistant material, while the piston lower part is made of light metal.
Die Verbindung der beiden aus unterschiedlichen Materialien bestehenden Kolbenteile erfolgt dabei über Schraubenverbindungen, da Schweiß- oder Lötverbindungen ausscheiden.The combination of the two made of different materials Piston parts are made via screw connections, as welded or soldered connections retire.
Verbindungen zwischen Kolbenober- und -unterteil durch Schrauben oder dergleichen machen jedoch häufig Probleme, da sie im Dauerbetrieb vielfach zu einer Lockerung der beiden Teile voneinander führen.Connections between piston upper and lower part by screws or The like, however, often cause problems, since they often become one in continuous operation Loosen the two parts from each other.
Trotz dieses Nachteiles haben sich derartig gebaute Kolben mit einem Kolbenunterteil aus Leichtmetall wegen ihres geringen Gewichtes durchgesetzt, da ganz aus Stahl bestehende Kolben wegen ihres wesentlich höheren Gewichtes bisher nicht befriedigen konnten.Despite this disadvantage, pistons constructed in this way have a Piston lower part made of light metal because of its low weight prevailed Pistons made entirely of steel because of their much higher weight could not satisfy.
Der Erfindunq liegt daher die Aufgabe zugrunde, einen Kolben der eingangs genannten Gattung derart zu gestalten,daß bei Ausbildung mit einem Kolbenober- und einem Kolbenunterteil die Gefahr der Lockerung der Verbindung dieser beiden Teile vermieden ist, ohne daß eine wesentliche Gewichtserhöhung des Kolbens in Kauf genommen werden muß.The invention is therefore based on the object of a piston of the initially to design mentioned genus in such a way that when training with a piston top and a piston lower part the risk of loosening the connection between these two parts is avoided without a substantial increase in the weight of the piston taken into account must become.
Diese Aufgabe wird gemäß der Erfindung dadurch gelöst, daß der das Kolbenoberteil tragende Kolbenunterteil aus fließgepreßtem Stahl besteht und mit dem Kolbenoberteil durch Schweißen oder Löten verbunden ist. Die Ausbildung des Kolbenunterteils aus fließgepreßtem Stahl ermöglicht sehr geringe Wandstärken im Kolbenunterteil, wodurch das Gewicht des gesamten Kolbens wie bei dem bekannten gebauten Kolben gering gehalten werden kann.Das Kolbenunterteil kann kalt oder warm fließgepreßt sein.This object is achieved according to the invention in that the the Piston upper part supporting piston lower part consists of extruded steel and with the upper piston part is connected by welding or soldering. The training of the Piston lower part made of extruded steel enables very small wall thicknesses in the Piston lower part, whereby the weight of the entire piston as with the known The piston base can be cold or warm be extruded.
Mit der erfindungsgemäßen zweiteiligen Kolbenausbildung aus einem Ober- und einem fließgepreßten Unterteil kann eine weitere Gewichtsverringerung des Kolbens dadurch erreicht werden, daß der Kühlkanal in den Verbindungsbereich zwischen diesen beiden Kolbenteilen gelegt wird, so daß er in seinem Querschnitt sowohl vom Kolbenober- als auch vom Kolbenunterteil begrenzt wird. Hierbei ist es möglich, dem Kühlkanal relativ großen Querschnitt zu geben, wodurch das Kolbengewicht weiter reduziert wird. Der Kühlkanal kann mit seinem Querschnitt ganz in den Kolbenoberteil oder in den Kolbenunterteil oder jeweils teilweise in diese beiden Kolbenteile eingreifen. Statt einem Kühlkanal können auch mehrere Kühlkanäle in dieser Weise angeordnet sein.With the two-part piston design according to the invention from one Upper and an extruded lower part can provide a further weight reduction of the piston can be achieved in that the cooling channel in the connecting area is placed between these two piston parts so that it is in its cross-section is limited by both the upper piston and the lower piston part. Here it is possible to give the cooling channel a relatively large cross-section, reducing the piston weight is further reduced. The cross section of the cooling channel can go completely into the piston upper part or engage in the lower piston part or in each case partially in these two piston parts. Instead of one cooling channel, several cooling channels can also be arranged in this way be.
Um bei großem Querschnitt des oder der Kühlkanäle nicht zu hohe Wärmemengen vom Kolbenboden abzuziehen, die ein Ansteigen des spezifischen Kraftstoffverbrauches der Brennkraftmaschine zur Folge hätte, und um die abzuführenden Wärmemengen gezielt steuern zu können, sind der oder die Kühlkanäle im Querschnitt durch eine oder mehrere Trennwände in zwei oder mehr nebeneinander sich erstreckende Kanalräume unterteilt. Hierdurch kann in verschiedenen Bereichen des bzw. der Kühlkanäle ein verschieden großer Kühlmitteltransport sichergestellt werden. Die Trennwand kann sich im wesentlichen über die gesamte unter dem Kolbenoberteil befindliche Länge des Kühlkanals erstrecken und die beiderseits der Trennwand befindlichen Kanalräume gegeneinander abdichten. In der Trennwand können aber auch Verbindungsöffnungen zum Ubertritt des Kühlmittels von einem zum anderen der beiden Kanalräume vorhanden sein.In order to avoid excessive amounts of heat given a large cross-section of the cooling channel or channels from the piston crown, which increases the specific fuel consumption the internal combustion engine would result, and targeted to the amount of heat to be dissipated To be able to control are the cooling channel or channels in cross section through one or more Partition walls divided into two or more side by side extending channel spaces. As a result, a different can be achieved in different areas of the cooling channel or channels large coolant transport can be ensured. The partition can be substantially Extend over the entire length of the cooling channel located under the upper piston part and seal the channel spaces located on both sides of the partition wall against one another. In the partition, however, there can also be connection openings for the coolant to pass over from one to the other of the two canal spaces.
Bei einem ringförmigen Kühlkanal sind die beiden durch die Trennwand gebildeten Kühlraum ebenfalls ringförmiv, wobei die Trennwand zweckmäßig so angeordnet ist, daß der eine ringförmige Kanalraum von der Trennwand aus gesehen dem Kolbenboden zugewandt und der andere Kanalraum von dem Kolbenboden bzw.In the case of an annular cooling channel, the two are through the partition formed cooling space also ring-shaped, wherein the partition is expediently arranged is that the one annular channel space seen from the partition wall is the piston head facing and the other channel space from the piston head or
der Brennraummulde abgewandt ist. Der dem Kolbenboden bzw. der Brennraummulde abgewandte äußere Kanalraum steht dabei über Zu- und Abläufe mit der Kühlmittelversorgung des Kolbens in Verbindung, während der dem Kolbenboden bzw. der Brennraummulde zugewandte innere ringförmige Kanalraum evakuiert oder gasgefüllt sein kann. Die Ausgestaltung kann auch so getroffen sein, daß der innere Kanalraum mehr Luft bzw. Gas und weniger Kühlmittel führt als der äußere Kanalringraum. Dabei können zum Zwecke des Druckausgleichs relativ kleine Verbindungsöffnungen zum über tritt des Kühlmittels von einem zum anderen der beiden Kanalräume in der Trennwand vorgesehen sein. Hierdurch kann erreicht werden, daß die in dem inneren Kanalraum befindlichen Kühlmittelmengen nur einem geringen Austausch unterliegen.the combustion bowl is turned away. The piston crown or the combustion bowl The outer channel space facing away from it is connected to the coolant supply via inlets and outlets of the piston in connection, while facing the piston crown or the combustion bowl inner annular duct space can be evacuated or filled with gas. The design can also be made so that the inner duct space more air or gas and less Coolant passes as the outer channel annulus. In doing so, for the purpose of pressure equalization relatively small connection openings for the coolant to pass from one to the other other of the two channel spaces may be provided in the partition. This can be achieved be that the amount of coolant located in the inner duct space is only one subject to low exchange.
Infolge der vorgeschilderten Ausbildung des oder der Kühlkanäle wird durch das in ihnen strömende Kühlmittel nicht mehr Wärme als unbedingt notwendig aus dem Kolbenoberteil und damit aus den heissen Zonen des Kolbens der Brennkraftmaschine abgeführt. Deshalb stellen sich an den Wänden des inneren Kanalraumes hohe Wandtemperaturen ein, die zur Pyrolyse des meist aus öl bestehenden Kühlmittels und zu einem Ölkohleaufbau an diesen Wänden führen können. Dieser ölkohleaufbau führt aber zu einer wünschenswerten Wärme-Isolierwirkung im Bereich der Wände des inneren Kühlkanalraumes.As a result of the aforementioned training of the cooling channel or channels due to the coolant flowing in them, no more heat than is absolutely necessary from the piston upper part and thus from the hot zones of the piston of the internal combustion engine discharged. Therefore, high wall temperatures arise on the walls of the inner duct space one that is used for pyrolysis of the coolant, which usually consists of oil, and for an oil carbon build-up can lead to these walls. This oil coal build-up leads to a desirable one Thermal insulation effect in the area of the walls of the inner cooling duct space.
Besonders zweckmäßige Ausführungsbeispiele des erfindungsgemäßen Kolbens werden im folgenden anhand der Zeichnung näher beschrieben, welche jeweils Querschnitte durch den Kolben zeigen: Bei dem in Fig. 1 dargestellten Ausführungsbeispiel besteht der Kolben aus einem Kolbenunterteil 1 mit dem Kolbenringfeld 7 und einem Kolbenoberteil 2, welches auf den Kolbenunterteil durch Schweißnähte 3 fest und dauerhaft verbunden ist. Die Ausbildung von Kolbenunterteil 1 und Kolbenoberteil 2 ist im Bereich ihrer Verbindungsflächen so getroffen, daß sie einen ringförmigen Kühlkanal von großem Querschnitt begrenzen, der sowohl in den Kolbenunterteil als auch in den Kolbenoberteil heineinragt.Particularly useful embodiments of the piston according to the invention are described in more detail below with reference to the drawing, which cross-sections show by the piston: In the embodiment shown in Fig. 1, there is the piston consists of a piston lower part 1 with the piston ring zone 7 and a piston upper part 2, which is firmly and permanently connected to the lower part of the piston by welds 3 is. The formation of the piston lower part 1 and piston upper part 2 is in the area of their Connection surfaces taken so that they have an annular cooling channel of large Limit the cross section, both in the piston lower part and in the piston upper part protrudes.
Dieser Ringraum mit großem Querschnitt ist durch eine z.B.This large cross-section annulus is provided with a e.g.
aus Blech bestehende Trennwand 4 in zwei sich zueinander konzentrisch erstreckende ringförmige Kanalräume 5, 6 unterteilt, wobei die Trennwand 4 so gelegt ist, daß der eine Kanalraum 5 der Brennraummulde 10, und dem Kolbenboden zugewandt ist und der andere ringförmige Kanalraum 6 von dieser Brennraummulde abgewandt ist. Die Trennwand 4 ist an den Verbindungsstellen zwischen Kolbenober- und Kolbenunterteil festgeschweißt. Der der Brennraummulde 10 zugewandte innere ringförmige Kanalraum 5 dient hauptsächlich der Vermeidung von Wärmeverlusten. Er kann zu diesem Zwecke gasgefüllt oder evakuiert sein. Der äußere, der Brennraummulde abgewandte Kanalraum 6 ist über Zu- und Abläufe an das Kühlmittelversorgungssystem des Kolbens angeschlossen, so daß er in bekannter Weise von Kühlmittel, z.B. Motorenöl, durchströmt .rd.made of sheet metal partition 4 in two concentric to each other extending annular channel spaces 5, 6 divided, the partition 4 so placed is that the one channel space 5 of the combustion bowl 10, and facing the piston head and the other annular channel space 6 faces away from this combustion bowl. The partition 4 is at the connection points between the upper and lower piston parts welded in place. The inner annular duct space facing the combustion bowl 10 5 is mainly used to avoid heat loss. He can do this for this purpose be filled with gas or evacuated. The outer duct space facing away from the combustion bowl 6 is connected to the coolant supply system of the piston via inlets and outlets, so that coolant, e.g. engine oil, flows through it in a known manner .rd.
Die Ausbildung kann ferner so getroffen sein, daß kein oder nur ein kleiner Anteil des Kühlmittels in den inneren Kanalraum 5 gelangt. Dies kann beispielsweise auch dadurch geschehen, daß die Trennwand 4 mit relativ kleinen Verbindungsöffnungen zum Übertritt des Kühlmittels von dem einen in den anderen Kanalraum ausgestattet ist.The training can also be made so that no or only one A small proportion of the coolant gets into the inner duct space 5. This can be, for example also happen that the partition 4 with relatively small connecting openings equipped for the passage of the coolant from one channel space into the other is.
Mit Hilfe der Trennwand 4 und der aus Stahl bestehenden Begrenzungswände des Kühlkanals wird ein großes Temperaturgefälle, ausgehend vom Kolbenboden, erreicht. Bei zweckmäßiger Gestaltung des durchströmten Kühlkanals werden trotz hoher Temperaturen im Kolbenbrennraum und kleiner über den gesamten Kolben abgeführter Wärmemengen die maximalen Temperaturen in den Kolbenringnuten 7 nicht höher als bei vorbekannten Motoren.With the help of the partition 4 and the boundary walls made of steel of the cooling channel, a large temperature gradient, starting from the piston crown, is achieved. With a suitable design of the cooling channel through which there is a flow, despite high temperatures in the piston combustion chamber and smaller amounts of heat dissipated over the entire piston the maximum temperatures in the piston ring grooves 7 are not higher than in the previously known Engines.
Das in Fig. 2 dargestellte Ausführungsbeispiel unterscheidet sich yon demjenigen gemäß Fig. 1 nur dadurch, daß sich das Kolbenoberteil 2 bis zur zylindrischen Außenfläche des Kolbens erstreckt und zwei der drei an der zylindrischen Kolbenaußenseite befindlichen Kolbenringnuten 7 aufweist. Die unterste dieser drei Kolbenringnuten ist im Kolbenunterteil angeordnet. Oberhalb dieser untersten Kolbenringnut befindet sich die äußere Schweißnaht 3 für die Verbindung des Kolbenoberteils mit dem Kolbenunterteil 1. Es ist auch möglich, diese äußere Schweißnaht zwischen der oberen und der mittleren Kolbenringnut oder unterhalb der untersten Kolbenringnut anzuordnen.The embodiment shown in Fig. 2 differs yon the one according to FIG. 1 only in that the piston upper part 2 is up to the cylindrical Extends outer surface of the piston and two of the three on the cylindrical piston outside Has piston ring grooves 7 located. The lowest of these three piston ring grooves is arranged in the lower part of the piston. Located above this lowest piston ring groove the outer weld 3 for the connection of the piston upper part with the piston lower part 1. It is also possible to have this outer weld between the top and the middle Piston ring groove or below the lowest piston ring groove.
Bei Anordnung der äußeren Schweißnaht 3 unterhalb der oberen, der mittleren oder der unteren Ringnut 7 sind die Verschleißfestigkeiten der im höher legierten Kolbenoberteil 2 liegenden Nuten flanken wesentlich höher, als wenn sie sich im wenig legierten Werkstoff des Kolbenunterteils 1 befinden würden. Für hoch aufgeladene Motoren ist eine hohe Nutenverschleißfestigkeit dieser Ringnuten jedoch ausschlaggebend, so daß die in Fig. 2 dargestellte Ausführungsform gerade für hoch aufgeladene Motoren von besonderer Bedeutung ist.When arranging the outer weld 3 below the upper, the middle or lower annular groove 7, the wear resistance of the im is higher alloyed piston upper part 2 lying grooves flank much higher than if they in the little alloyed Material of the piston lower part 1 are located would. For highly charged engines, a high slot wear resistance is this However, annular grooves are crucial, so that the embodiment shown in FIG is of particular importance for highly charged engines.
Das in Fig. 3 dargestellte Ausführungsbeispiel unterscheidet sich von demjenigen gemäß Fig. 1 nur dadurch, daß der innere, der Brennraummulde 10 zugewandte Kanalraum des Kühlkanals mit Isoliermaterial 8 gefüllt ist. Dieses Isoliermaterial 8 kann an der Trennwand 4, eventuell aber auch an dem Kolbenoberteil 2 befestigt sein. Bei dem in Fig. 4 dargestellten Ausführungsbeispiel ist das Isoliermaterial im Inneren durch die Trennwand 4 geschaffenen Kanalraum durch einen Isolierkörper 9 gebildet.The embodiment shown in Fig. 3 differs from that of FIG. 1 only in that the inner one, facing the combustion bowl 10 Channel space of the cooling channel is filled with insulating material 8. This insulating material 8 can be attached to the partition 4, but possibly also to the upper piston part 2 be. In the embodiment shown in Fig. 4, the insulating material in the interior created by the partition 4 duct space through an insulating body 9 formed.
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Claims (13)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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DE19803032671 DE3032671A1 (en) | 1980-08-29 | 1980-08-29 | Cooled IC engine piston - has pressed steel main body and heat-resistant e.g. steel top welded on in annular cooling chamber area |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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DE19803032671 DE3032671A1 (en) | 1980-08-29 | 1980-08-29 | Cooled IC engine piston - has pressed steel main body and heat-resistant e.g. steel top welded on in annular cooling chamber area |
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DE3032671A1 true DE3032671A1 (en) | 1982-03-18 |
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DE19803032671 Ceased DE3032671A1 (en) | 1980-08-29 | 1980-08-29 | Cooled IC engine piston - has pressed steel main body and heat-resistant e.g. steel top welded on in annular cooling chamber area |
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Cited By (27)
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DE3625492A1 (en) * | 1986-07-28 | 1988-02-04 | Kloeckner Humboldt Deutz Ag | MULTI-PIECE PISTON FOR AN INTERNAL COMBUSTION ENGINE |
US6026777A (en) * | 1998-10-07 | 2000-02-22 | Mahle Gmbh | Piston having a barrel of forged steel and a cooling channel |
EP0992671A2 (en) * | 1998-10-06 | 2000-04-12 | Caterpillar Inc. | Method and apparatus for making a two piece unitary piston |
WO2000043661A1 (en) | 1999-01-20 | 2000-07-27 | Mahle Gmbh | Constructed piston or piston consisting of components that are welded or soldered together |
DE19915782A1 (en) * | 1999-04-08 | 2000-11-02 | Ks Kolbenschmidt Gmbh | Piston for an IC motor with fuel injection has a recessed zone at the piston head with an aluminum component to reinforce the recessed zone edge formed by powder metallurgy and welded to the piston blank |
DE10063568A1 (en) * | 2000-12-20 | 2002-07-04 | Mahle Gmbh | Cooling channel piston for a diesel engine with direct injection with a piston diameter of 100 mm |
US6840155B2 (en) * | 2000-10-18 | 2005-01-11 | Federal-Mogul World Wide, Inc. | Multi-axially forged piston |
US6862976B2 (en) | 2001-10-23 | 2005-03-08 | Federal-Mogul World Wide, Inc. | Monobloc piston |
EP1719900A1 (en) * | 2005-05-04 | 2006-11-08 | Pistal Racing S.r.L. | High density metal alloy piston for internal combustion engine and process for manufacturing such piston |
DE102005061060A1 (en) * | 2005-12-21 | 2007-06-28 | Mahle International Gmbh | Piston for internal combustion engine has cavity wall consisting of reinforcement ring formed from oxidation-resistant material of low thermal conductivity |
WO2007149193A2 (en) * | 2006-06-22 | 2007-12-27 | Caterpillar Inc. | Cooling gallery fan assembly for a piston |
DE102007061601A1 (en) * | 2007-12-20 | 2009-06-25 | Mahle International Gmbh | Piston for an internal combustion engine and method for its production |
DE102008035696A1 (en) * | 2008-07-30 | 2010-02-18 | Mahle International Gmbh | Piston manufacturing method for modern internal combustion engine, involves sealing part of recess using covering part, filling remaining parts of recess with auxiliary material by welding, finishing blank to piston or piston upper part |
US7971355B2 (en) | 2007-12-20 | 2011-07-05 | Mahle International Gmbh | Method for attaching a ring element to a piston for an internal combustion engine |
WO2011101140A1 (en) * | 2010-02-17 | 2011-08-25 | Mahle International Gmbh | Piston assembly |
DE102012008682A1 (en) | 2011-07-12 | 2013-01-17 | Mahle International Gmbh | Piston for an internal combustion engine and method for its production |
WO2013029592A1 (en) * | 2011-08-26 | 2013-03-07 | Mahle International Gmbh | Piston for an internal combustion engine |
WO2013044015A1 (en) * | 2011-09-21 | 2013-03-28 | Mahle International Gmbh | Laser welded piston assembly; methods of assembling and joining such piston |
US8459228B2 (en) | 2011-07-12 | 2013-06-11 | Mahle International Gmbh | Method for the production of a piston for an internal combustion engine and piston for an internal combustion engine |
DE102012014192A1 (en) * | 2012-07-18 | 2014-01-23 | Mahle International Gmbh | Piston e.g. single-part piston for e.g. diesel engine of passenger car, has cooling passage provided with passage wall adjacent to ring portion, and annular component provided in region of wall and comprising edge that projects into passage |
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 |
WO2014159634A1 (en) * | 2013-03-14 | 2014-10-02 | Mahle International Gmbh | Welded piston assembly |
US8973484B2 (en) | 2011-07-01 | 2015-03-10 | Mahle Industries Inc. | Piston with cooling gallery |
CN106103958A (en) * | 2014-03-03 | 2016-11-09 | 费德罗-莫格尔公司 | The combustion bowl edge manufacturing with additional machining and the single piston as characteristic for the inner-cooling oil recess |
CN106285999A (en) * | 2016-08-09 | 2017-01-04 | 山东滨州渤海活塞股份有限公司 | Monoblock type internal combustion engine steel pistons, internal combustion engine, the vehicles and manufacture method |
US9856820B2 (en) | 2010-10-05 | 2018-01-02 | Mahle International Gmbh | Piston assembly |
CN111720234A (en) * | 2019-03-21 | 2020-09-29 | 强莉莉 | Split composite piston and forming method |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT195181B (en) * | 1953-07-22 | 1958-01-25 | Oesterr Saurerwerke Ag | Pistons for internal combustion engines |
DE1157428B (en) * | 1961-08-19 | 1963-11-14 | Maschf Augsburg Nuernberg Ag | Internal combustion engine with regulation of heat dissipation from the combustion chamber |
CH425338A (en) * | 1965-08-09 | 1966-11-30 | Tsni Dizelny I | Pistons 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 |
DE1576013A1 (en) * | 1967-11-18 | 1971-05-19 | Elsbett Konstruktion Inst Fuer | Cross head piston with central combustion chamber for injection engines |
DE2016386A1 (en) * | 1970-04-07 | 1971-12-16 | Maschinenfabrik Augsburg Nürnberg AG . 8500 Nürnberg | Pistons for internal combustion engines, in particular diesel engines |
DE2140824A1 (en) * | 1971-08-14 | 1973-02-22 | Maschf Augsburg Nuernberg Ag | OIL-COOLED PISTON FOR COMBUSTION MACHINES |
DE2424882A1 (en) * | 1974-05-22 | 1975-12-04 | Kloeckner Humboldt Deutz Ag | I.C. engine liquid cooled piston - is two part with cooling chamber separated from cooling channel by welded partition |
DE2558761A1 (en) * | 1975-01-06 | 1976-07-08 | Texaco Development Corp | COMBUSTION ENGINE |
US4011797A (en) * | 1973-07-19 | 1977-03-15 | Dampers Societe Anonyme | Oil-cooled piston for a heat engine |
-
1980
- 1980-08-29 DE DE19803032671 patent/DE3032671A1/en not_active Ceased
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT195181B (en) * | 1953-07-22 | 1958-01-25 | Oesterr Saurerwerke Ag | Pistons for internal combustion engines |
DE1157428B (en) * | 1961-08-19 | 1963-11-14 | Maschf Augsburg Nuernberg Ag | Internal combustion engine with regulation of heat dissipation from the combustion chamber |
CH425338A (en) * | 1965-08-09 | 1966-11-30 | Tsni Dizelny I | Pistons for internal combustion engines |
DE1576013A1 (en) * | 1967-11-18 | 1971-05-19 | Elsbett Konstruktion Inst Fuer | Cross head piston with central combustion chamber for injection engines |
DE1814123A1 (en) * | 1968-12-12 | 1971-03-11 | Maschf Augsburg Nuernberg Ag | Method and device for cooling an internal combustion engine piston |
DE2016386A1 (en) * | 1970-04-07 | 1971-12-16 | Maschinenfabrik Augsburg Nürnberg AG . 8500 Nürnberg | Pistons for internal combustion engines, in particular diesel engines |
DE2140824A1 (en) * | 1971-08-14 | 1973-02-22 | Maschf Augsburg Nuernberg Ag | OIL-COOLED PISTON FOR COMBUSTION MACHINES |
US4011797A (en) * | 1973-07-19 | 1977-03-15 | Dampers Societe Anonyme | Oil-cooled piston for a heat engine |
DE2424882A1 (en) * | 1974-05-22 | 1975-12-04 | Kloeckner Humboldt Deutz Ag | I.C. engine liquid cooled piston - is two part with cooling chamber separated from cooling channel by welded partition |
DE2558761A1 (en) * | 1975-01-06 | 1976-07-08 | Texaco Development Corp | COMBUSTION ENGINE |
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US4831917A (en) * | 1986-07-28 | 1989-05-23 | Kloeckner-Humboldt Deutz Ag | Multiple piece piston for an internal combustion engine |
DE3625492A1 (en) * | 1986-07-28 | 1988-02-04 | Kloeckner Humboldt Deutz Ag | MULTI-PIECE PISTON FOR AN INTERNAL COMBUSTION ENGINE |
EP0992671A2 (en) * | 1998-10-06 | 2000-04-12 | Caterpillar Inc. | Method and apparatus for making a two piece unitary piston |
EP0992671A3 (en) * | 1998-10-06 | 2001-01-17 | Caterpillar Inc. | Method and apparatus for making a two piece unitary piston |
US6026777A (en) * | 1998-10-07 | 2000-02-22 | Mahle Gmbh | Piston having a barrel of forged steel and a cooling channel |
DE19846152A1 (en) * | 1998-10-07 | 2000-04-13 | Mahle Gmbh | Piston with piston base made of forged steel and a cooling channel |
US6467397B1 (en) | 1999-01-20 | 2002-10-22 | Mahle Gmbh | Constructed piston or piston consisting of components that are welded or soldered together |
WO2000043661A1 (en) | 1999-01-20 | 2000-07-27 | Mahle Gmbh | Constructed piston or piston consisting of components that are welded or soldered together |
DE19902144A1 (en) * | 1999-01-20 | 2000-07-27 | Mahle Gmbh | Piston composed of components welded or soldered to each other, with lower part of forged steel with shaft extension below boss |
DE19915782A1 (en) * | 1999-04-08 | 2000-11-02 | Ks Kolbenschmidt Gmbh | Piston for an IC motor with fuel injection has a recessed zone at the piston head with an aluminum component to reinforce the recessed zone edge formed by powder metallurgy and welded to the piston blank |
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US6840155B2 (en) * | 2000-10-18 | 2005-01-11 | Federal-Mogul World Wide, Inc. | Multi-axially forged piston |
US6892689B2 (en) | 2000-12-20 | 2005-05-17 | Mahle Gmbh | Cooling duct piston for a direct-injection diesel engine |
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