EP1180592B1 - Steel piston - Google Patents
Steel piston Download PDFInfo
- Publication number
- EP1180592B1 EP1180592B1 EP20010117240 EP01117240A EP1180592B1 EP 1180592 B1 EP1180592 B1 EP 1180592B1 EP 20010117240 EP20010117240 EP 20010117240 EP 01117240 A EP01117240 A EP 01117240A EP 1180592 B1 EP1180592 B1 EP 1180592B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- base part
- gap
- annular section
- projection
- 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.)
- Expired - Lifetime
Links
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
- 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
Definitions
- the invention relates to a piston for an internal combustion engine according to the features of the preamble of claim 1.
- a piston for an internal combustion engine is known from EP 0 804 680 B1, in which a ring section or a lower part of the ring section is connected to the piston crown or an upper part of the ring section via a welding or soldering process. Through the ring section and the piston crown (base part) creates a circumferential, downwardly free space, which is closed by a component, so that a cooling channel is formed.
- a piston is also known, in which a ring portion is welded to a base part of the piston. A circumferential wall of the base part and the component welded to the base part together form a radially outer and an axial-lower boundary wall of a cooling channel.
- This piston has a plurality of holes directed into the cooling channel, via which the cooling channel is supplied with a cooling medium, in particular engine oil. This cooling medium is injected by appropriate means into the piston inner region and fed via the bores to the cooling channel. The drain also takes place via these holes.
- the cooling channel has the purpose that is cooled by the coolant channel flowing through the cooling medium, in particular engine oil, the piston crown area to protect it from damage due to high Brennraumtemparaturen.
- the cooling medium in particular engine oil
- DE 36 43 039 A1 or DE 198 46 152 A1 existing between the cooling channel and the interior of the piston holes represent an additional manufacturing step. At the same time, these holes are located at a point in the piston, which weakens the strength of the piston.
- the invention is therefore based on the object to simplify a piston for an internal combustion engine in terms of its production, without the stability is reduced.
- At least one further opening in particular a circumferential gap, is present.
- this opening the cooling medium can be removed from the cooling channel, so that can be dispensed with additional holes in the piston except the opening for the supply of the cooling medium.
- the supply of the cooling medium takes place in an advantageous manner via at least one opening, which is likewise provided in the ring section.
- the gap is formed by the attachment and the shape of the ring portion with respect to the base part. This means that the ring portion and the corresponding region of the base part are matched to one another such that after attachment of the ring portion, the gap arises by itself. Work steps for introducing the gap are thus eliminated altogether.
- the further opening in particular the gap, is introduced after the attachment of the ring section to the base part.
- the shape of the ring portion and the corresponding shape of the base part are coordinated so that after attachment of the ring portion of the cooling channel is largely or completely closed.
- the introduction of the at least one further opening (of the gap) takes place, wherein it may also be instead of a circumferential gap to several holes or teilumfnature columns.
- this requires a further operation, however, it can be accepted because the opening for the purpose of supplying the cooling medium is arranged in a region of the piston through which the piston crown region is not weakened.
- the ring section can be attached to the base part by means of a welding method. This can be mounted on the base part in a simple and known manner, the ring portion after its production. Base part and ring section can both be produced by casting, for example.
- the piston is preferably made of steel.
- a weld joint is arranged in alignment with the gap. This has the advantage that the joint and the gap region of the base part can be machined prior to attachment of the ring portion with the same degree.
- Figure 1 shows a detail of the bottom portion of a piston for an internal combustion engine. It is a pendulum piston. The remainder of the design of the piston is not important, for the sake of completeness reference is made to the construction of a piston on FIG. 1 together with the associated description of EP 0 804 680 B1 or FIG. 1 together with the associated description of DE 198 46 152 A1.
- the piston shown in Figure 1 has a base part 1, wherein in the bottom region of a combustion bowl 2 is present.
- a prefabricated ring section 3, which later carries the piston rings, is attached to the base part by means of a welding process in the region of a welding joint 4.
- the ring portion 3 has a web 5, which is directed in the direction of the base part 1, but does not come to rest on this, so that the web 5 and the corresponding region of the base part 1 form a gap 6.
- a cooling channel 7, which is also formed by the shape of the base part 1 and the ring portion 3, cooling medium, such as engine oil, are supplied.
- the gap 6 is shown larger in the figures for the purpose of illustrating the geometric configuration than in reality.
- the gap 6, that is, the gap, or even the size of the one or more openings, is to be chosen so that an optimal volume flow into thedeknanal 7 in and is given out in particular on the gap 6 out.
- the cooling medium sufficiently long time in the cooling channel 7 remains to absorb the heat, and is discharged in good time.
- the ring portion 3 can be pushed from below, so over the piston shaft, in its end position, since the inner diameter of the ring portion 3 in the region of the web fifth it is not allowed to push the ring section 3 over the floor area. This is possible with pendulum piston, since the diameter in the region of the piston shaft is smaller than the inner diameter in the region of the web fifth
- Figure 2 shows a similar construction of a piston as in Figure 1, but with the difference that both the base part 1 and the ring portion 3 each have mutually facing projections 8 and 9, which form the gap 6.
- the projections 8 and. 9 can be the same or different lengths.
- the welding joint 4 and the gap 6 are in alignment, thereby simplifying the machining of the components involved.
- a construction shown in FIG. 2 can be realized both in the case of pendulum and monobloc pistons, since the inner diameter in the area of the projection 9 (after the final assembly of the ring section 3 on the base part 1) is in any case equal to or greater than the diameter of the bottom area without the ring section 3.
- the front side of the projection 9 can exceed the vertical line to the left, both in the case of pendulum piston and monoblock piston.
- the ring portion has an at least opening through which the cooling medium is injected by suitable means in the internal combustion engine in the cooling channel. This opening and the funds are available in any case.
Description
Die Erfindung betrifft einen Kolben für eine Brennkraftmaschine gemäß den Merkmalen des Oberbegriffes des Patentanspruches 1.The invention relates to a piston for an internal combustion engine according to the features of the preamble of
Aus der EP 0 804 680 B1 ist ein Kolben für eine Brennkraftmaschine bekannt, bei dem ein Ringabschnitt oder ein unterer Teil des Ringabschnittes über ein Schweiß- oder Lötverfahren mit dem Kolbenboden bzw. einem oberen Teil des Ringabschnittes verbunden ist. Durch den Ringabschnitt und den Kolbenboden (Basisteil) entsteht ein umlaufender, nach unten freier Raum, der durch ein Bauteil verschlossen wird, so daß ein Kühlkanal entsteht.A piston for an internal combustion engine is known from EP 0 804 680 B1, in which a ring section or a lower part of the ring section is connected to the piston crown or an upper part of the ring section via a welding or soldering process. Through the ring section and the piston crown (base part) creates a circumferential, downwardly free space, which is closed by a component, so that a cooling channel is formed.
Aus der DE 36 43 039 A1 oder der DE 198 46 152 A1 ist ebenfalls ein Kolben bekannt, bei dem ein Ringabschnitt an ein Basisteil des Kolbens angeschweißt wird. Eine umlaufende Wand des Basisteils und das mit dem Basisteil verschweißte Bauteil bilden gemeinsam eine radial-äußere und axial-untere Begrenzungswand eines Kühlkanals. Dieser Kolben weist mehrere in den Kühlkanal gerichtete Bohrungen auf, über welche der Kühlkanal mit einem Kühlmedium, insbesondere Motoröl, versorgt wird. Dieses Kühlmedium wird mit entsprechenden Mitteln in den Kolbeninnenbereich gespritzt und über die Bohrungen dem Kühlkanal zugeführt. Der Abfluß erfolgt ebenfalls über diese Bohrungen.From DE 36 43 039 A1 or DE 198 46 152 A1, a piston is also known, in which a ring portion is welded to a base part of the piston. A circumferential wall of the base part and the component welded to the base part together form a radially outer and an axial-lower boundary wall of a cooling channel. This piston has a plurality of holes directed into the cooling channel, via which the cooling channel is supplied with a cooling medium, in particular engine oil. This cooling medium is injected by appropriate means into the piston inner region and fed via the bores to the cooling channel. The drain also takes place via these holes.
Der Kühlkanal hat den Zweck, daß durch das den Kühlkanal durchströmende Kühlmedium, insbesondere Motoröl, der Kolbenbodenbereich gekühlt wird, um ihn vor Beschädigungen infolge hoher Brennraumtemparaturen zu schützen. Bei den bekannten Bauarten der Kolben ist es erforderlich, den Kühlkanal mit einer Öffnung zu versehen, durch welche das Kühlmedium in den Kühlkanal strömen kann. So stellen die bei der DE 36 43 039 A1 oder der DE 198 46 152 A1 zwischen dem Kühlkanal und dem Innenbereich des Kolbens vorhandenen Bohrungen einen zusätzlichen Herstellungsschritt dar. Gleichzeitig befinden sich diese Bohrungen an einer Stelle im Kolben, die die Festigkeit des Kolbens schwächt.The cooling channel has the purpose that is cooled by the coolant channel flowing through the cooling medium, in particular engine oil, the piston crown area to protect it from damage due to high Brennraumtemparaturen. In the known types of piston, it is necessary to provide the cooling passage with an opening through which the cooling medium can flow into the cooling passage. Thus, in DE 36 43 039 A1 or DE 198 46 152 A1 existing between the cooling channel and the interior of the piston holes represent an additional manufacturing step. At the same time, these holes are located at a point in the piston, which weakens the strength of the piston.
Der Erfindung liegt daher die Aufgabe zugrunde, einen Kolben für eine Brennkraftmaschine hinsichtlich seiner Herstellung zu vereinfachen, ohne daß die Stabilität verringert wird.The invention is therefore based on the object to simplify a piston for an internal combustion engine in terms of its production, without the stability is reduced.
Diese Aufgabe ist durch die Merkmale des Patentanspruches 1 gelöst.This object is solved by the features of
Es ist vorgesehen, daß nach der Endbearbeitung des Kolbens zwischen dem Basisteil und dem Ringabschnitt zumindest eine weitere Öffnung, insbesondere ein umlaufender Spalt, vorhanden ist. Durch diese Öffnung (diesen Spalt) kann das Kühlmedium aus dem Kühlkanal abgeführt werden, so daß außer der Öffnung für die Zufuhr des Kühlmediums auf zusätzliche Bohrungen im Kolben verzichtet werden kann. Die Zufuhr des Kühlmediums erfolgt in vorteilhafter über zumindest eine Öffnung, die ebenfalls in dem Ringabschnitt vorgesehen ist. Dadurch sind sämtliche Öffnungen, gleich welcher geometrischer Form, in einem Bereich des Kolbens angeordnet, durch den die Festigkeit des Kolbens nicht beeinträchtigt ist. Die Anordnung einer Öffnung im Basisteil kann damit vermieden werden.It is envisaged that after the finishing of the piston between the base part and the ring portion at least one further opening, in particular a circumferential gap, is present. Through this opening (this gap), the cooling medium can be removed from the cooling channel, so that can be dispensed with additional holes in the piston except the opening for the supply of the cooling medium. The supply of the cooling medium takes place in an advantageous manner via at least one opening, which is likewise provided in the ring section. As a result, all openings, no matter which geometric shape, are arranged in a region of the piston, by which the strength of the piston is not impaired. The arrangement of an opening in the base part can thus be avoided.
In Weiterbildung der Erfindung entsteht der Spalt durch die Anbringung und die Form des Ringabschnittes in Bezug auf das Basisteil. Das bedeutet, daß der Ringabschnitt und der korrespondierende Bereich des Basisteils derart aufeinander abgestimmt sind, daß nach Anbringung des Ringabschnittes der Spalt von alleine entsteht. Arbeitsschritte zur Einbringung des Spaltes entfallen damit gänzlich.In development of the invention, the gap is formed by the attachment and the shape of the ring portion with respect to the base part. This means that the ring portion and the corresponding region of the base part are matched to one another such that after attachment of the ring portion, the gap arises by itself. Work steps for introducing the gap are thus eliminated altogether.
In einer alternativen Ausgestaltung der Erfindung wird die weitere Öffnung, insbesondere der Spalt, nach der Anbringung des Ringabschnittes an dem Basisteil eingebracht. Das bedeutet, daß die Form des Ringabschnittes und die korrespondierende Form des Basisteils so aufeinander abgestimmt sind, daß nach Anbringung des Ringabschnittes der Kühlkanal weitestgehend oder vollständig geschlossen ist. Anschließend erfolgt die Einbringung der zumindest einen weiteren Öffnung (des Spaltes), wobei es sich auch anstelle eines umlaufenden Spaltes um mehrere Bohrungen oder teilumfängliche Spalten handeln kann. Hierdurch wird zwar ein weiterer Arbeitsschritt erforderlich, der jedoch deshalb in Kauf genommen werden kann, weil die Öffnung zwecks Zuführung des Kühlmediums in einem Bereich des Kolbens angeordnet ist, durch welchen der Kolbenbodenbereich nicht geschwächt wird.In an alternative embodiment of the invention, the further opening, in particular the gap, is introduced after the attachment of the ring section to the base part. This means that the shape of the ring portion and the corresponding shape of the base part are coordinated so that after attachment of the ring portion of the cooling channel is largely or completely closed. Subsequently, the introduction of the at least one further opening (of the gap) takes place, wherein it may also be instead of a circumferential gap to several holes or teilumfängliche columns. Although this requires a further operation, however, it can be accepted because the opening for the purpose of supplying the cooling medium is arranged in a region of the piston through which the piston crown region is not weakened.
In Weiterbildung der Erfindung ist der Ringabschnitt mittels eines Schweißverfahrens an dem Basisteil anbringbar. Damit kann auf einfache und an sich bekannte Art und Weise der Ringabschnitt nach seiner Herstellung an dem Basisteil angebracht werden. Basisteil und Ringabschnitt können beispielsweise beide im Gießverfahren hergestellt werden. Der Kolben besteht vorzugsweise aus Stahl.In a development of the invention, the ring section can be attached to the base part by means of a welding method. This can be mounted on the base part in a simple and known manner, the ring portion after its production. Base part and ring section can both be produced by casting, for example. The piston is preferably made of steel.
In Weiterbildung der Erfindung ist eine Schweißfuge in einer Flucht mit dem Spalt angeordnet. Dies hat den Vorteil, daß der Fugen- und der Spaltbereich des Basisteiles vor Anbringung des Ringabschnittes mit dem gleichen Maß bearbeitet werden kann.In a further development of the invention, a weld joint is arranged in alignment with the gap. This has the advantage that the joint and the gap region of the base part can be machined prior to attachment of the ring portion with the same degree.
Zwei Ausführungsbeispiele der vorliegenden Erfindung, auf die diese jedoch nicht beschränkt ist, sind im folgenden beschrieben und anhand der Figuren erläutert.Two embodiments of the present invention, to which, however, is not limited, are described below and explained with reference to the figures.
Es zeigen:
- Figur 1:
- einen Kolben, bei dem ein Ringabschnitt einen Steg aufweist und
- Figur 2:
- einen Kolben, bei dem sowohl der Ringabschnitt als auch das Basisteil einen Vorsprung aufweisen.
- FIG. 1:
- a piston in which a ring portion has a web and
- FIG. 2:
- a piston in which both the ring portion and the base part have a projection.
Figur 1 zeigt ausschnittsweise den Bodenbereich eines Kolbens für eine Brennkraftmaschine. Es handelt sich hierbei um einen Pendelschaftkolben. Auf die übrige Bauart des Kolbens kommt es nicht an, wobei der Vollständigkeit halber auf den Aufbau eines Kolbens auf die Figur 1 nebst zugehöriger Beschreibung der EP 0 804 680 B1 bzw. die Figur 1 nebst zugehöriger Beschreibung der DE 198 46 152 A1 verwiesen wird.Figure 1 shows a detail of the bottom portion of a piston for an internal combustion engine. It is a pendulum piston. The remainder of the design of the piston is not important, for the sake of completeness reference is made to the construction of a piston on FIG. 1 together with the associated description of EP 0 804 680 B1 or FIG. 1 together with the associated description of DE 198 46 152 A1.
Der in Figur 1 gezeigte Kolben weist ein Basisteil 1 auf, wobei im Bodenbereich eine Brennraummulde 2 vorhanden ist. Ein vorgefertigter Ringabschnitt 3, der später die Kolbenringe trägt, wird mittels eines Schweißverfahrens im Bereich einer Schweißfuge 4 an dem Basisteil angebracht. Der Ringabschnitt 3 weist einen Steg 5 auf, der in Richtung des Basisteiles 1 gerichtet ist, aber an diesem nicht zur Anlage kommt, so daß der Steg 5 und der korrespondierende Bereich des Basisteiles 1 einen Spalt 6 bilden. Über diesen Spalt 6 kann einem Kühlkanal 7, der ebenfalls durch die Form des Basisteiles 1 und des Ringabschnittes 3 gebildet ist, Kühlmedium, wie Motoröl, zugeführt werden. Der Spalt 6 ist in den Figuren zwecks Verdeutlichung der geometrischen Ausgestaltung größer dargestellt als in der Realität. Der Spalt 6, das heißt das Spaltmaß, oder aber auch die Größe der einen Öffnung oder mehrerer Öffnungen, ist dabei so zu wählen, daß ein optimaler Volumenfluß in den Kühlknanal 7 hinein und insbesondere über den Spalt 6 heraus gegeben ist. Denn es ist anzustreben, daß das Kühlmedium ausreichend lange Zeit im Kühlkanal 7 verbleibt, um die Wärme aufzunehmen, und rechtzeitig wieder abgeführt wird.
Der Ringabschnitt 3 kann von unten, also über den Kolbenschaft, in seine Endposition geschoben werden, da der Innendurchmesser des Ringabschnittes 3 im Bereich des Steges 5 es nicht gestattet, den Ringabschnitt 3 über den Bodenbereich zu schieben. Dies ist bei Pendelschaftkolben möglich, da der Durchmesser im Bereich des Kolbenschaftes kleiner ist als der Innendurchmesser im Bereich des Steges 5.The piston shown in Figure 1 has a
The
Figur 2 zeigt einen ähnlichen Aufbau eines Kolbens wie in Figur 1, jedoch mit dem Unterschied, daß sowohl das Basisteil 1 als auch der Ringabschnitt 3 jeweils einander zugewandte Vorsprünge 8 und 9 aufweisen, die den Spalt 6 bilden. Die Vorsprünge 8 und. 9 können gleich oder unterschiedlich lang sein. In bevorzugter Ausgestaltung liegen die Schweißfuge 4 und der Spalt 6 in einer Flucht, so daß dadurch die Bearbeitung der beteiligten Bauteile vereinfacht wird.
Ein in Figur 2 gezeigter Aufbau ist realisierbar sowohl bei Pendelschaft- als auch bei Monoblockkolben, da der Innendurchmesser im Bereich des Vorsprunges 9 (nach der Endmontages des Ringabschnittes 3 auf dem Basisteil 1) auf jeden Fall gleich oder größer ist als der Durchmesser des Bodenbereiches ohne den Ringabschnitt 3. Bei Betrachtung der Figur 2 bedeutet dies, daß, wenn eine senkrechte Linie durch die Schweißfuge 4 gezogen wird, die Stirnseite des Vorsprunges 8 maximal von rechts und die Stirnseite des Vorsprunges 9 maximal von links, unter Bildung des Spaltes 6, an die senkrechte Linie heranreicht. Dies entspricht insbesondere den geometrischen Verhältnissen bei Monoblockkolben, da bei dieser Bauart der Ringabschnitt 3 nur, bei Betrachtung der Figur 2, von oben über den Kolbenbodenbereich aufgeschoben werden kann, wobei die Stirnseite des Vorsprunges 9 nicht nach rechts die senkrechte Linie überschreiten darf. Hingegen kann die Stirnseite des Vorsprunges 9 sowohl bei Pendelschaftkolben als auch bei Monoblockkolben die senkrechte Linie nach links überschreiten.Figure 2 shows a similar construction of a piston as in Figure 1, but with the difference that both the
A construction shown in FIG. 2 can be realized both in the case of pendulum and monobloc pistons, since the inner diameter in the area of the projection 9 (after the final assembly of the
In den Figuren ist nicht gezeigt, daß der Ringabschnitt eine zumindest Öffnung aufweist, über die das Kühlmedium mittels geeigneter Mittel in der Brennkraftmaschine in den Kühlkanal eingespritzt wird. Diese Öffnung und die Mittel sind aber auf jeden Fall vorhanden.In the figures, it is not shown that the ring portion has an at least opening through which the cooling medium is injected by suitable means in the internal combustion engine in the cooling channel. This opening and the funds are available in any case.
Claims (7)
- Piston for an internal combustion engine, wherein the piston comprises at least a base part (1) and an annular section (3) attached to the latter, wherein the base part (1) forms a cooling duct (7) with the annular section (3), and wherein a cooling medium can be supplied to the cooling duct (7) via an opening, characterized in that after final machining of the piston, at least one further opening, in particular a continuously encircling gap (6), is present between the base part (1) and the annular section (3).
- Piston according to Claim 1, characterized in that the gap (6) is produced by the attachment and the shape of the annular section (3) in relation to the base part (1).
- Piston according to Claim 1, characterized in that the further opening, in particular the gap (6), is inserted after attachment of the annular section (3) to the base part (1).
- Piston according to Claims 1 to 3, characterized in that the annular section (3) can be attached to the component (1) by means of a welding operation.
- Piston according to one of the preceding claims, characterized in that a welded joint (4) is arranged in alignment with the gap (6).
- Piston according to one of the preceding claims, characterized in that a projection (5) which is aligned in the direction of the base part (1) is arranged at least on the annular section (3), which projection (5), together with the wall of the base part (1), forms the further opening, in particular the gap (6).
- Piston according to Claim 6, characterized in that the base part (1) has a projection (8) which, together with the projection (5), forms the gap (6).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10040486 | 2000-08-18 | ||
| DE2000140486 DE10040486C2 (en) | 2000-08-18 | 2000-08-18 | steel pistons |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1180592A2 EP1180592A2 (en) | 2002-02-20 |
| EP1180592A3 EP1180592A3 (en) | 2002-09-11 |
| EP1180592B1 true EP1180592B1 (en) | 2006-03-15 |
Family
ID=7652919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20010117240 Expired - Lifetime EP1180592B1 (en) | 2000-08-18 | 2001-07-17 | Steel piston |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1180592B1 (en) |
| DE (2) | DE10040486C2 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| DE102010056220A1 (en) * | 2010-12-24 | 2012-06-28 | Mahle International Gmbh | Piston for an internal combustion engine |
| DE102010056218A1 (en) * | 2010-12-24 | 2012-06-28 | Mahle International Gmbh | Piston for an internal combustion engine |
| DE102012014193A1 (en) * | 2012-07-18 | 2014-05-15 | Mahle International Gmbh | Piston for an internal combustion engine |
| DE102013009164A1 (en) * | 2013-05-31 | 2014-12-04 | Mahle International Gmbh | Piston for an internal combustion engine |
| DE102013009161A1 (en) | 2013-05-31 | 2014-12-18 | Mahle International Gmbh | Piston for an internal combustion engine |
| CN106662035B (en) * | 2014-07-02 | 2019-07-23 | Ks科尔本施密特有限公司 | Gap geometry in the cooling duct piston that material engages in locking manner |
| MX2018013353A (en) | 2016-05-04 | 2019-02-20 | Ks Kolbenschmidt Gmbh | Piston. |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD123962A1 (en) * | 1975-12-24 | 1977-01-26 | ||
| DE3643039A1 (en) * | 1986-12-17 | 1988-06-30 | Mahle Gmbh | COOLABLE SUBMERSIBLE PISTON FOR COMBUSTION ENGINES |
| DE19501416A1 (en) * | 1995-01-19 | 1996-07-25 | Kolbenschmidt Ag | Forged or cast piston head of a multi-part piston |
| DE19846152A1 (en) * | 1998-10-07 | 2000-04-13 | Mahle Gmbh | Piston with piston base made of forged steel and a cooling channel |
-
2000
- 2000-08-18 DE DE2000140486 patent/DE10040486C2/en not_active Revoked
-
2001
- 2001-07-17 EP EP20010117240 patent/EP1180592B1/en not_active Expired - Lifetime
- 2001-07-17 DE DE50109197T patent/DE50109197D1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP1180592A2 (en) | 2002-02-20 |
| DE10040486A1 (en) | 2002-03-07 |
| DE10040486C2 (en) | 2002-10-31 |
| EP1180592A3 (en) | 2002-09-11 |
| DE50109197D1 (en) | 2006-05-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1546535A1 (en) | Multi-part cooled piston for an internal combustion engine | |
| DE4112576A1 (en) | Piston for diesel engine - is made in two parts which are friction welded together | |
| DE10113993B4 (en) | Coupling element for a crawler arrangement and chain link arrangement for a crawler | |
| WO2007031107A1 (en) | Piston, especially cooling channel piston, comprising three friction-welded zones | |
| DE3521206C2 (en) | ||
| DE4134529C2 (en) | Method for producing a piston head with a cooling chamber and piston head produced according to this method | |
| DE10244511A1 (en) | Multi-part cooled piston for an internal combustion engine | |
| WO2007031109A1 (en) | Piston, especially cooling channel piston, of an internal combustion engine, comprising three friction-welded zones | |
| DE10352244A1 (en) | Method for producing a piston for an internal combustion engine | |
| DE102004031513A1 (en) | Method for producing a cooling channel piston for an internal combustion engine | |
| DE10000952B4 (en) | Oil filter and manufacturing method for the same | |
| EP1180592B1 (en) | Steel piston | |
| DE10209168B4 (en) | Steel piston with cooling channel | |
| DE10218999B4 (en) | Piston with ring carrier and mold cooling channel | |
| DE19536349C1 (en) | Crank shaft welded from single elements each with crank web | |
| DE10015709B4 (en) | Piston with an annular cooling channel | |
| DE19715016A1 (en) | Two-part housing and method for its manufacture | |
| DE102004038464A1 (en) | Piston e.g. coolant duct piston for internal combustion engine has upper section and lower section whereby both sections have three radially surrounding bars which can be brought together during assembly process | |
| DE102004038465A1 (en) | Cooling channel piston for internal combustion engine, has connecting part with joining areas in direction of head and base part of piston, respectively, where areas of connecting part corresponds with joining areas of head and base part | |
| DE10047258A1 (en) | Piston for an IC motor has a ring section mounted at the base section, to form a cooling channel, with a single welded seam in alignment with a butting point for simplified production without loss of stability | |
| EP0624414A1 (en) | Method for manufacturing a crankshaft | |
| DE102021203241A1 (en) | Piston for an internal combustion engine and method of manufacturing the piston | |
| DE10132447A1 (en) | Piston with cooling duct in crown has cooling duct open to the bottom and covered with a welded ring | |
| EP3356666A1 (en) | Two-part piston having an open cooling channel | |
| DE10234539B4 (en) | Piston with an open-cast cooling channel ring carrier and method for its production |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 20010717 |
|
| AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR |
|
| AX | Request for extension of the european patent |
Free format text: AL;LT;LV;MK;RO;SI |
|
| PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
| AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR |
|
| AX | Request for extension of the european patent |
Free format text: AL;LT;LV;MK;RO;SI |
|
| RIC1 | Information provided on ipc code assigned before grant |
Free format text: 7F 02F 3/00 A, 7F 02F 3/22 B |
|
| AKX | Designation fees paid |
Designated state(s): DE FR GB IT SE |
|
| GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
| GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE FR GB IT SE |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED. Effective date: 20060315 |
|
| REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D Free format text: NOT ENGLISH |
|
| GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 20060315 |
|
| REF | Corresponds to: |
Ref document number: 50109197 Country of ref document: DE Date of ref document: 20060511 Kind code of ref document: P |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20060615 |
|
| ET | Fr: translation filed | ||
| PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
| 26N | No opposition filed |
Effective date: 20061218 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20090716 Year of fee payment: 9 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20090720 Year of fee payment: 9 |
|
| GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20100717 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20110331 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20100802 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20100717 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20140721 Year of fee payment: 14 |
|
| REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 50109197 Country of ref document: DE |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20160202 |