EP1984613B1 - Multiple-part steel piston for an internal combustion engine having a cooling duct - Google Patents
Multiple-part steel piston for an internal combustion engine having a cooling duct Download PDFInfo
- Publication number
- EP1984613B1 EP1984613B1 EP07703220.9A EP07703220A EP1984613B1 EP 1984613 B1 EP1984613 B1 EP 1984613B1 EP 07703220 A EP07703220 A EP 07703220A EP 1984613 B1 EP1984613 B1 EP 1984613B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- ring element
- ring
- main body
- web
- 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.)
- Active
Links
- 238000001816 cooling Methods 0.000 title claims description 14
- 238000002485 combustion reaction Methods 0.000 title claims description 12
- 229910000831 Steel Inorganic materials 0.000 title description 4
- 239000010959 steel Substances 0.000 title description 4
- 238000000034 method Methods 0.000 description 6
- 238000003466 welding Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000005304 joining Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 239000010705 motor oil Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 230000005923 long-lasting effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
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
- F02F3/0015—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
Definitions
- the invention relates to a piston for an internal combustion engine with a cooling channel according to the features of the preamble of claim 1.
- Pistons with a cooling channel for internal combustion engines are known in principle.
- cooling channel piston said piston is provided behind the ring field coaxially and radially circumferentially, a cooling passage, circulated by the engine oil for cooling the upper portion of the piston.
- the former design has been proven in practice, but the disadvantage that a complete removal of the lost core is required to prevent the ingress of foreign bodies, which have formed the lost core, in the engine oil circuit of the internal combustion engine.
- the second-mentioned method has the disadvantage that in this way quite high-build piston arise because the radially encircling depression must be introduced with a corresponding tool from below.
- the piston consists of a piston upper part and a piston lower part.
- a ring field formed by a ring element with annular grooves, a coaxial and radially encircling cooling channel behind it, and in particular a combustion bowl are provided.
- the lower piston part has at least one piston shaft and a corresponding pin bore.
- the contact areas of the ring element are designed at least once paragraph-shaped on the piston body and the ring element is permanently attached to the piston body.
- the invention is therefore based on the object to improve a generic piston to the effect that the initially described disadvantages are avoided.
- This object is achieved in that protrudes from the piston body an upper web and a comparatively larger diameter lower web, both of which are designed radially encircling, wherein the downwardly facing peripheral edge of the ring member rests with a shoulder on the lower web.
- the heel-shaped design of the abutment areas has the advantage that the ring element is guided both during placement and after attachment to the piston body and is guided guided, so that tilting can be avoided.
- the heel-shaped abutment areas also increase the strength of the piston crown and the upper piston part, after the ring element has been permanently attached to the piston body. Through this both form-fitting and material-locking connection easier assembly and increased strength is given.
- Another advantage of the invention is to be seen in that the wall thicknesses of the betelligten components, in particular of the ring member and the piston body (in particular the wall thickness in the transition region from the cooling channel to a combustion bowl) over the prior art can be reduced, as for placing the ring element on the piston body only small forces are required, which are significantly lower than those forces that would be required, as if the ring member to be bolted to the piston body.
- the desired and sufficiently large cross-section of the cooling channel can be realized in advance by appropriate shaping of both the Kobengrund stressess and the ring element with the piston according to the invention thus achieved several advantages, namely Festlgkeitsslessness mecanic, easier production and assembly, lower piston height and also a weight savings Reason of the described reductions in wall thicknesses.
- piston upper part 2 a ring field with a plurality of annular grooves 4 and a radially surrounding cooling channel 5 arranged behind it is provided in a manner known per se. Not necessarily also a combustion chamber trough 6 is arranged behind the cooling channel 5. Depending on the design of the piston 1, such a combustion bowl 6 is present or not. In addition or as an alternative to a combustion bowl 6, one or more valve pockets may also be present.
- the piston lower part 3 has, in a manner also known per se, at least one piston shaft 7, in particular a cylinder-shaped piston skirt, and a pin bore 8 for receiving a piston pin.
- the downwardly facing peripheral edge of the ring element 9 rests with a shoulder on the lower web 11. As a result, the final position of the ring element 9 is predetermined on the piston body.
- the lower web 11 on which the lower peripheral edge of the ring element 9 rests, designed paragraph-shaped.
- the lower web 11 protrudes almost horizontally from the piston main body, on the one hand to pretend the position of the ring member 9 on the piston body and on the other hand the height to reduce the piston, since in this embodiment, the piston skirt and the piston hub can go out almost perpendicular and at right angles from the lower web 11.
- a joining process in which the upper and lower joint 12, 13 are processed so that the ring member 9 is permanently connected to the piston body comes in a particularly advantageous manner, a welding process or a soldering process in question. Due to the thin wall thicknesses to be welded in the region of the webs 10, 11 and to achieve a low distortion and small heat-affected zones, the welding processes laser welding, electron beam welding, plasma welding or TIG orbital welding are suitable. If high carbon contents of the steels to be used are used for the ring element and the piston main body, an additional material should be selected which, in addition to the required strength, also has sufficient toughness and deformability.
- a piston which can be used for the operation of high-speed, high-pressure diesel engines with outputs greater than 80 kW per liter and ignition pressures above 200 bar.
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)
Description
Die Erfindung betrifft einen Kolben für einen Verbrennungsmotor mit einem Kühlkanal gemäß den Merkmalen des Oberbegriffes des Patentanspruches 1.The invention relates to a piston for an internal combustion engine with a cooling channel according to the features of the preamble of
Kolben mit einem Kühlkanal für Verbrennungsmotore sind grundsätzlich bekannt. Bei solchen, auch Kühlkanalkolben genannten Kolben ist hinter dem Ringfeld koaxial und radial umlaufend, ein Kühlkanal vorgesehen, durch den Motoröl zur Kühlung des oberen Bereiches des Kolbens zirkuliert.Pistons with a cooling channel for internal combustion engines are known in principle. In such, also cooling channel piston said piston is provided behind the ring field coaxially and radially circumferentially, a cooling passage, circulated by the engine oil for cooling the upper portion of the piston.
Es ist bekannt, solche Kühlkanäle durch einen verlorenen Kern herzustellen.It is known to produce such cooling channels through a lost core.
Außerdem ist es bekannt, einen zugänglichen Bereich des Kolbenbodens mit einer umlaufenden Vertiefung zu versehen, die anschließend mit einem Verschlusselement, wie z.B. einem Blechstreifen, verschlossen wird.Moreover, it is known to provide an accessible area of the piston crown with a circumferential recess, which is then connected to a closure element, such as a cap. a metal strip, is closed.
Die erstgenannte Konstruktion hat sich in der Praxis zwar bewährt, aber den Nachteil, dass ein vollständiges Entfernen des verlorenen Kerns erforderlich ist, um das Eindringen von Fremdkörpern, die den verlorenen Kern gebildet haben, in den Motoröl-Kreislauf des Verbrennungsmotors zu vermeiden. Die zweitgenannte Methode hat den Nachteil, dass hierdurch recht hoch bauende Kolben entstehen, da die radial umlaufende Vertiefung mit einem entsprechenden Werkzeug von unten eingebracht werden muss.The former design has been proven in practice, but the disadvantage that a complete removal of the lost core is required to prevent the ingress of foreign bodies, which have formed the lost core, in the engine oil circuit of the internal combustion engine. The second-mentioned method has the disadvantage that in this way quite high-build piston arise because the radially encircling depression must be introduced with a corresponding tool from below.
Um diese beschriebenen Nachteile zu vermeiden, ist aus der
Bei der
Bei der
Aus der
Der Erfindung liegt daher die Aufgabe zu Grunde, einen gattungsgemäßen Kolben dahingehend zu verbessern, dass die eingangs geschilderten Nachteile vermieden werden.The invention is therefore based on the object to improve a generic piston to the effect that the initially described disadvantages are avoided.
Diese Aufgabe ist dadurch gelöst, dass aus dem Kolbengrundkörper ein oberer Steg und ein demgegenüber durchmessergrößerer unterer Steg herausragt, die beide radial umlaufend gestaltet sind, wobei der nach unten weisende umlaufende Rand des Ringelementes mit einem Absatz auf dem unteren Steg aufliegt. Die absatzförmig Gestaltung der Anlagebereiche hat den Vorteil, dass das Ringelement sowohl beim Aufsetzen als auch nach dem Anbringen an dem Kolbengrundkörper geführt wird und geführt gelagert ist, so dass Verkantungen vermieden werden. Die absatzförmigen Anlagebereiche erhöhen darüber hinaus die Festigkeit des Kolbenbodens bzw. des Kolbenoberteils, nachdem das Ringelement unlösbar an dem Kolbengrundkörper angefügt worden ist. Durch diese sowohl formschlüssige als auch materialschlüssige Verbindung ist eine einfachere Montage und eine erhöhte Festigkeit gegeben. Ein weiterer Vorteil der Erfindung ist darin zu sehen, dass die Wandstärken der betelligten Bauelemente, insbesondere des Ringelements und des Kolbengrundkörpers (insbesondere die Wandstärke im Übergangsbereich von dem Kühlkanal zu einer Brennraummulde) gegenüber dem Stand der Technik verringert werden können, da zum Aufsetzen des Ringelementes auf den Kolbengrundkörper nur geringe Kräfte erforderlich sind, die deutlich geringer ausfallen als diejenigen Kräfte, die erforderlich wären, als wenn das Ringelement auf dem Kolbengrundkörper festgeschraubt werden soll. Außerdem lässt sich durch entsprechende Formgebung sowohl des Kobengrundkörpers als auch des Ringelements schon vorab der gewünschte und ausreichend große Querschnitt des Kühlkanals realisieren, Mit dem erfindungsgemäßen Kolben werden also mehrere Vorteile erzielt, nämlich Festlgkeitssteigerung, einfachere Herstellung und Montage, geringere Kolbenhöhe und auch eine Gewichtsersparnis auf Grund der geschilderten Verringerungen der Wandstärken.This object is achieved in that protrudes from the piston body an upper web and a comparatively larger diameter lower web, both of which are designed radially encircling, wherein the downwardly facing peripheral edge of the ring member rests with a shoulder on the lower web. The heel-shaped design of the abutment areas has the advantage that the ring element is guided both during placement and after attachment to the piston body and is guided guided, so that tilting can be avoided. The heel-shaped abutment areas also increase the strength of the piston crown and the upper piston part, after the ring element has been permanently attached to the piston body. Through this both form-fitting and material-locking connection easier assembly and increased strength is given. Another advantage of the invention is to be seen in that the wall thicknesses of the betelligten components, in particular of the ring member and the piston body (in particular the wall thickness in the transition region from the cooling channel to a combustion bowl) over the prior art can be reduced, as for placing the ring element on the piston body only small forces are required, which are significantly lower than those forces that would be required, as if the ring member to be bolted to the piston body. In addition, the desired and sufficiently large cross-section of the cooling channel can be realized in advance by appropriate shaping of both the Kobengrundkörpers and the ring element with the piston according to the invention thus achieved several advantages, namely Festlgkeitssteigerung, easier production and assembly, lower piston height and also a weight savings Reason of the described reductions in wall thicknesses.
Ein Ausführungsbeisplel der Erfindung, auf das diese jedoch nicht beschränkt ist, ist in den beiden
- In diesen Figuren ist ein
Kolben 1 gezeigt, der aus einemKolbenoberteil 2 und einemKolbenunterteil 3 besteht. Derfertige Kolben 1 kann einstückig sein oder aus den zunächst voneinander 2, 3 bestehen, die zusammengefügt werden. Außerdem ist es denkbar, dass die Erfindung auch bei einem Kolbenkopf eines Pendelschaftkolbens angewendet wird.getrennten Teilen
- In these figures, a
piston 1 is shown, which consists of a pistonupper part 2 and a pistonlower part 3. The finishedpiston 1 may be in one piece or consist of the initially 2, 3, which are joined together. In addition, it is conceivable that the invention is also applied to a piston head of a pendulum piston.separate parts
Im Kolbenoberteil 2 ist in an sich bekannter Weise ein Ringfeld mit mehreren Ringnuten 4 und einem dahinter angeordneten radial umlaufenden Kühlkanal 5 vorhanden. Nicht zwingend ist ebenfalls hinter den Kühlkanal 5 eine Brennraummulde 6 angeordnet. Je nach Bauart des Kolbens 1 ist eine solche Brennraummulde 6 vorhanden oder nicht. Ergänzend oder alternativ zu einer Brennraummulde 6 können auch eine oder mehrere Ventiltaschen vorhanden sein. Das Kolbenunterteil 3 weist in ebenfalls an sich bekannter Weise zumindest einen Kolbenschaft 7, insbesondere einen zylinderförmig ausgestalten Kolbenschaft, sowie eine Bolzenbohrung 8 zur Aufnahme eines Kolbenbolzens auf.In piston
Nach der Herstellung eines Kolbengrundkörpers weist dieser einen oberen Steg 10 und einen unteren Steg 11 auf, die beide radial umlaufend gestaltet sind, wobei in besonders vorteilhafter Weise der obere Steg 10 im Durchmesser kleiner ist als der untere Steg 11. Dadurch ist es möglich, dass ein Ringelement 9, das separat von dem Kolbengrundkörper hergestellt worden ist, von oben (bei Betrachtung der
Außerdem ist es vorgesehen, dass der nach unten weisende umlaufende Rand des Ringelementes 9 mit einem Absatz auf den unteren Steg 11 aufliegt. Dadurch ist die endgültige Lage des Ringelementes 9 an dem Kolbengrundkörper vorgegeben.In addition, it is provided that the downwardly facing peripheral edge of the
Zur Erhöhung der Festigkeit nach dem Fügen des Ringelementes 9 an den Kolbengrundkörper und zur Verbesserung der Führung beim Aufsetzen des Ringelementes 9 an den Kolbengrundkörper ist der obere Steg 10 und der korrespondierende Bereich des Ringelementes 9 mit einem Absatz 14 versehen. Ebenso ist der untere Steg 11, auf dem der untere umlaufende Rand des Ringelementes 9 aufliegt, absatzförmig gestaltet. Von besonderem Vorteil ist die Gestaltung dieses Absatzes als Feder-Nut-Bereich 15. Hierzu ist weiterhin vorgesehen, dass der untere Steg 11 nahezu waagerecht von dem Kolbengrundkörper absteht, um einerseits die Lage des Ringelementes 9 an dem Kolbengrundkörper vorgeben zu können und andererseits die Bauhöhe des Kolbens zu reduzieren, da bei dieser Ausgestaltung der Kolbenschaft bzw. die Kolbennaben nahezu senkrecht und im rechten Winkel von dem unteren Steg 11 ausgehen können.To increase the strength after joining the
Nachdem das Ringelement 9 in der beschriebenen Art und Weise auf den Kolbengrundkörper aufgesetzt und durch Formschluss festgelegt worden ist, erfolgt ein Fügeprozess, in dem die obere und untere Fügestelle 12, 13 derart bearbeitet werden, dass das Ringelement 9 unlösbar mit dem Kolbengrundkörper verbunden wird. Hier kommt in besonders vorteilhafter Weise ein Schweißprozess oder ein Lötprozess in Frage. Auf Grund der dünnen zu verschweißenden Wandstärken im Bereich der Stege 10, 11 und zur Erzielung eines geringen Verzuges und kleiner Wärmeeinflusszonen bieten sich die Schweißprozesse Laserschweißen, Elektronikstrahlschweißen, Plasmaschweißen oder das WIG-Orbitalschweißen an. Werden hohe Kohlenstoffgehalte der zu verwendenden Stähle für Ringelement und Kolbengrundkörper verwendet, sollte ein Zusatzwerkstoff ausgewählt werden, der neben der erforderlichen Festigkeit auch eine ausreichende Zähigkeit und Verformbarkeit aufweist.After the
In besonders vorteilhafter Weise lässt sich mit der vorliegenden Erfindung ein Kolben realisieren, der für den Betrieb von schnell laufenden, hoch belasteten Dieselmotoren mit Leistungen größer als 80 kW pro Liter und Zünddrücken oberhalb 200 bar einsetzbar ist.In a particularly advantageous manner can be realized with the present invention, a piston which can be used for the operation of high-speed, high-pressure diesel engines with outputs greater than 80 kW per liter and ignition pressures above 200 bar.
- 1.1.
- Kolbenpiston
- 2.Second
- KolbenoberteilPiston crown
- 3.Third
- KolbenunterteilPiston part
- 4.4th
- Ringnutring groove
- 5.5th
- Kühlkanalcooling channel
- 6.6th
- BrennraummuldeCombustion bowl
- 7.7th
- Kolbenschaftpiston shaft
- 8.8th.
- Bolzenbohrungpin bore
- 9.9th
- Ringelementring element
- 10.10th
- oberer Stegupper jetty
- 11.11th
- unterer Steglower jetty
- 12.12th
- obere Fügestelleupper joint
- 13.13th
- untere Fügestellelower joint
- 14.14th
- Absatzparagraph
- 15.15th
- Feder-Nut-BereichTongue and groove area
- 16.16th
- Kolbenbodenpiston crown
Claims (4)
- Piston (1) which consists of a piston upper part (2) and a piston lower part (3), there being, in the region of the piston upper part (2), a ring zone which is formed by a ring element (9) and has ring grooves (4), a cooling duct (5) which runs around coaxially and radially behind it, and, in particular, a combustion chamber recess (6), and the piston lower part (3) having at least one piston skirt (7) and a corresponding pin bore (8), the bearing regions of the ring element (9) against the piston main body being designed with at least one step, and the ring element (9) being joined non-releasably to the piston main body, characterized in that an upper web (10) and a lower web (11) of greater diameter with respect to the former protrude out of the piston main body, which webs (10, 11) are both of radially circumferential design, the downwardly pointing circumferential edge of the ring element (9) lying with a step on the lower web (11) .
- Piston (1) according to Claim 1, characterized in that the step, with which the downwardly pointing circumferential edge of the ring element (9) lies on the lower web (11), is configured as a tongue/groove region.
- Piston (1) according to Claim 1 or 2, characterized in that the lower web (11) projects approximately horizontally from the piston main body.
- Piston (1) according to one of the preceding claims, characterized in that the ring element (9) is rotationally symmetrical and forms the entire ring zone region and the outer edge of the piston crown (16).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL07703220T PL1984613T3 (en) | 2006-02-17 | 2007-02-02 | Multiple-part steel piston for an internal combustion engine having a cooling duct |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006007806 | 2006-02-17 | ||
PCT/EP2007/000891 WO2007093289A1 (en) | 2006-02-17 | 2007-02-02 | Multiple-part steel piston for an internal combustion engine having a cooling duct |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1984613A1 EP1984613A1 (en) | 2008-10-29 |
EP1984613B1 true EP1984613B1 (en) | 2017-11-01 |
Family
ID=37969849
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07703220.9A Active EP1984613B1 (en) | 2006-02-17 | 2007-02-02 | Multiple-part steel piston for an internal combustion engine having a cooling duct |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1984613B1 (en) |
DE (1) | DE102007005268A1 (en) |
PL (1) | PL1984613T3 (en) |
WO (1) | WO2007093289A1 (en) |
Families Citing this family (21)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102007044106A1 (en) * | 2007-09-15 | 2009-03-19 | Mahle International Gmbh | Two-piece piston for an internal combustion engine |
DE102008038325A1 (en) | 2007-12-20 | 2009-06-25 | Mahle International Gmbh | Method for attaching a ring element on a piston for an internal combustion engine |
DE102009025691A1 (en) | 2009-06-20 | 2010-01-28 | Daimler Ag | Piston for internal combustion engine, particularly reciprocating internal combustion engine, has upper piston area, which has ring carrier with ring groove and piston bowl |
DE102009041392A1 (en) | 2009-09-12 | 2011-05-26 | Daimler Ag | Piston for internal combustion engine, particularly reciprocating piston engine, has upper piston area, which has ring carrier with ring groove and piston bowl |
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 |
DE102010051033A1 (en) | 2010-11-11 | 2012-05-16 | Daimler Ag | Liquid-cooled piston of an internal combustion engine |
DE102010051681B4 (en) | 2010-11-17 | 2019-09-12 | Daimler Ag | Method for producing a cooling channel piston |
DE102010056218A1 (en) * | 2010-12-24 | 2012-06-28 | Mahle International Gmbh | Piston for an internal combustion engine |
DE102011013143A1 (en) | 2011-03-04 | 2012-09-06 | Mahle International Gmbh | Piston for an internal combustion engine and method for its production |
DE102011107656A1 (en) * | 2011-07-12 | 2013-01-17 | Mahle International Gmbh | Method for producing a piston for an internal combustion engine and pistons for an internal combustion engine |
US9593641B2 (en) * | 2011-09-21 | 2017-03-14 | Mahle International Gmbh | Laser welded piston assembly |
US20160061326A1 (en) | 2012-08-23 | 2016-03-03 | Ks Kolbenschmidt Gmbh | Joined connection on a two-piece steel piston and joining method |
DE102012215300A1 (en) * | 2012-08-29 | 2014-03-06 | Federal-Mogul Nürnberg GmbH | Steel/aluminum piston, used in motor, includes cooling channel and piston parts connected to along triangular weld seam produced by welding process, where seam is directed to cooling channel and cavity is formed by melting welding bead |
DE102012220778A1 (en) * | 2012-11-14 | 2014-05-15 | Mahle International Gmbh | Laser welding method for welding two elements e.g. plug and camshaft tube of motor component e.g. camshaft used in internal combustion engine, involves welding two elements of motor component with each other at adjustable welding depth |
US9440310B2 (en) * | 2013-01-15 | 2016-09-13 | Mahle International Gmbh | Monolite piston laser welding spatter control |
BR112015020267A2 (en) * | 2013-02-22 | 2017-08-22 | Mahle Int Gmbh | PISTON ASSEMBLY WITH WELDING SUPPORT |
DE102017109471A1 (en) | 2016-05-04 | 2017-11-09 | Ks Kolbenschmidt Gmbh | piston |
KR101874560B1 (en) * | 2016-12-08 | 2018-07-04 | 동양피스톤 주식회사 | Piston for vehicle engine and method for manufacturing the same |
US10926362B2 (en) * | 2018-12-13 | 2021-02-23 | Caterpillar Inc. | Remanufactured engine piston and method |
DE102022102051A1 (en) | 2022-01-28 | 2023-08-03 | Ks Kolbenschmidt Gmbh | Piston blank, piston and method |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3613521A (en) * | 1968-11-07 | 1971-10-19 | Komatsu Mfg Co Ltd | Piston for internal combustion engine |
BR8803970A (en) * | 1988-07-15 | 1990-03-20 | Metal Leve Sa | REFRIGERATED ARTICULATED PUMP |
IT1240526B (en) * | 1990-07-31 | 1993-12-17 | Borgo Nova S.P.A. | IMPROVEMENT RELATING TO PISTONS, IN GENERAL. |
DE19846152A1 (en) * | 1998-10-07 | 2000-04-13 | Mahle Gmbh | Piston with piston base made of forged steel and a cooling channel |
DE10128737B4 (en) * | 2001-06-13 | 2005-08-18 | Federal-Mogul Nürnberg GmbH | Piston with dispersion-hardened piston upper part |
US7104183B2 (en) * | 2004-07-07 | 2006-09-12 | Karl Schmidt Unisia, Inc. | One-piece steel piston |
-
2007
- 2007-02-02 DE DE102007005268A patent/DE102007005268A1/en not_active Ceased
- 2007-02-02 PL PL07703220T patent/PL1984613T3/en unknown
- 2007-02-02 WO PCT/EP2007/000891 patent/WO2007093289A1/en active Application Filing
- 2007-02-02 EP EP07703220.9A patent/EP1984613B1/en active Active
Non-Patent Citations (1)
Title |
---|
None * |
Also Published As
Publication number | Publication date |
---|---|
PL1984613T3 (en) | 2018-04-30 |
WO2007093289A1 (en) | 2007-08-23 |
DE102007005268A1 (en) | 2007-08-30 |
EP1984613A1 (en) | 2008-10-29 |
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