EP0957256B1 - Ring carrier for an internal combustion engine piston - Google Patents
Ring carrier for an internal combustion engine piston Download PDFInfo
- Publication number
- EP0957256B1 EP0957256B1 EP19990107244 EP99107244A EP0957256B1 EP 0957256 B1 EP0957256 B1 EP 0957256B1 EP 19990107244 EP19990107244 EP 19990107244 EP 99107244 A EP99107244 A EP 99107244A EP 0957256 B1 EP0957256 B1 EP 0957256B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ring carrier
- sheet metal
- cooling channel
- combustion engine
- internal combustion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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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
- F02F3/20—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 ring carrier for a piston an internal combustion engine with a sheet metal cooling channel, the is connected by welding to the ring carrier.
- Ring carrier cooling channel combinations are inherently out US 4,907,545 or known from FR 2.044.242. at In these constructions, the ring bearer back is for formation a cooling channel profiled so that a relatively simple, annular or cylindrical plate the cooling channel can close. However, this requires a high material and processing overhead and increases compared with a U-shaped sheet metal cooling channel, the weight of the piston.
- JP-OS 5-240347 it is also known in the Cross section approximately C-shaped, circular sheet metal cooling channel in Shrink the ring carrier and weld it with this. Also, this sheet metal part can only be complicated Forming forming technology.
- the invention therefore deals with the problem in a generic ring carrier a complex and expensive To avoid shaping the sheet metal cooling channel or the ring carrier.
- the radially outer wall of the sheet metal cooling channel can both be formed by one as well as by both sheet metal parts or the radial outer boundary of the cooling channel can formed by the radially inner wall of the ring carrier be.
- the two sheet metal parts normally connecting with each other Weld usually lies in the radially inner Wall of the sheet metal cooling channel.
- Sheet metal cooling duct By dividing the sheet metal cooling channel into two channel halves It becomes possible, instead of its hard-to-produce part to use two simple parts. Another advantage of Sheet metal cooling duct according to the invention is possible a variable shape with uneven cross-sections over the circumference, the z. B. positioned off-center Dumps may be required.
- Ring carrier it is also advantageous when cooled according to the invention Ring carrier that the shrinking of the sheet in the ring carrier or from DE-OS 26 24 412 known Herumbiegen of the sheet around the ring carrier can be omitted.
- the two sheet metal parts can z. B. as a circular half-shells be formed - wherein a side wall of the half-shell is pulled up - as in Fig. 1 or it may be a sheet metal part as a half-shell and the second sheet metal part with circular Angular profile as shown in Fig. 2 may be formed.
- the two halves of the cooling channel are usually together welded.
- the parts of the sheet metal cooling channel in the Slot reinforcement pressed in and additionally can on the ring carrier Centering or turned on the ring carrier back heels be, on which the sheet metal part rests.
- the piston 1 has a cooled ring carrier 2, the from a massive, circular groove reinforcement 3 made of Niresist material and one welded to the groove reinforcement 3 Sheet metal cooling channel 4 is made, in turn, from each other 2 welded channel halves 5 and 6 consists.
- the radially outer boundary of the cooling channel is through the formed radially inner wall of the groove reinforcement 3.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Description
Die Erfindung betrifft einen Ringträger für einen Kolben eines Verbrennungsmotors mit einem Blechkühlkanal, der durch Schweißen mit dem Ringträger verbunden ist.The invention relates to a ring carrier for a piston an internal combustion engine with a sheet metal cooling channel, the is connected by welding to the ring carrier.
Ringträger-Kühlkanal-Kombinationen sind an sich z.B. aus der US 4,907,545 oder aus der FR 2.044.242 bekannt. Bei diesen Konstruktionen ist der Ringträgerrücken zur Bildung eines Kühlkanals so profiliert, daß ein relativ einfaches, kreisringförmiges oder zylinderförmiges Blech den Kühlkanal verschließen kann. Dies erfordert jedoch einen hohen Material- und Bearbeitungsaufwand und erhöht, verglichen mit einem U-förmigen Blechkühlkanal, das Gewicht des Kolbens.Ring carrier cooling channel combinations are inherently out US 4,907,545 or known from FR 2.044.242. at In these constructions, the ring bearer back is for formation a cooling channel profiled so that a relatively simple, annular or cylindrical plate the cooling channel can close. However, this requires a high material and processing overhead and increases compared with a U-shaped sheet metal cooling channel, the weight of the piston.
Es ist ferner aus der DE 26 24 412 bekannt, zur Herstellung einer Ringträger-Kühlkanal-Kombination ein ebenes Kreisring-Blech U-förmig um einen Ringträger herumzubiegen und schweißtechnisch mit diesem zu verbinden. Dieses Verfahren erfordert am Ringträger kaum Bearbeitungsaufwand, ist jedoch umformtechnisch aufwendig.It is also known from DE 26 24 412, for the production a ring carrier-cooling channel combination a flat annular sheet metal U-shaped to bend around a ring carrier and welding technology to connect with this. This method requires little processing effort on the ring carrier, but is Umformtechnisch consuming.
Aus der JP-OS 5-240347 ist es ferner bekannt, einen im Querschnitt etwa C-förmigen, kreisrunden Blechkühlkanal in den Ringträger einzuschrumpfen und mit diesem zu verschweißen. Auch dieses Blechteil läßt sich nur durch aufwendige Umformtechnik herstellen.From JP-OS 5-240347 it is also known in the Cross section approximately C-shaped, circular sheet metal cooling channel in Shrink the ring carrier and weld it with this. Also, this sheet metal part can only be complicated Forming forming technology.
Die Erfindung beschäftigt sich daher mit dem Problem, bei einem gattungsgemäßen Ringträger eine aufwendige und teure Formgebung des Blechkühlkanals bzw. des Ringträgers zu vermeiden. The invention therefore deals with the problem in a generic ring carrier a complex and expensive To avoid shaping the sheet metal cooling channel or the ring carrier.
Dieses Problem wird gelöst durch einen Ringträger nach Anspruch
1. Vorteilhafte Weiterbildungen sind Gegenstand der
Unteransprüche.This problem is solved by a ring carrier according to
Die radial äußere Wand des Blechkühlkanals kann sowohl durch ein als auch durch beide Blechteile gebildet werden oder die radiale äußere Begrenzung des Kühlkanals kann durch die radial innen liegende Wand des Ringträgers gebildet sein.The radially outer wall of the sheet metal cooling channel can both be formed by one as well as by both sheet metal parts or the radial outer boundary of the cooling channel can formed by the radially inner wall of the ring carrier be.
Die die beiden Blechteile im Normalfall miteinander verbindende Schweißnaht liegt üblicherweise in der radial inneren Wand des Blechkühlkanals.The two sheet metal parts normally connecting with each other Weld usually lies in the radially inner Wall of the sheet metal cooling channel.
Durch die Teilung des Blechkühlkanals in zwei Kanalhälften wird es möglich, anstatt seinem schwer herzustellenden Teil zwei einfache Teile zu verwenden. Ein weiterer Vorteil des erfindungsgemäßen Blechkühlkanals besteht in der Möglichkeit einer variablen Formgebung mit ungleichmäßigen Querschnitten über den Umfang, die z. B. bei außermittig positionierten Mulden erforderlich werden können.By dividing the sheet metal cooling channel into two channel halves It becomes possible, instead of its hard-to-produce part to use two simple parts. Another advantage of Sheet metal cooling duct according to the invention is possible a variable shape with uneven cross-sections over the circumference, the z. B. positioned off-center Dumps may be required.
Ebenfalls von Vorteil ist beim erfindungsgemäßen gekühlten Ringträger, daß das Einschrumpfen des Blechs in den Ringträger bzw. das aus der DE-OS 26 24 412 bekannte Herumbiegen des Blechs um den Ringträger entfallen kann.It is also advantageous when cooled according to the invention Ring carrier that the shrinking of the sheet in the ring carrier or from DE-OS 26 24 412 known Herumbiegen of the sheet around the ring carrier can be omitted.
Die beiden Blechteile können z. B. als kreisrunde Halbschalen ausgebildet sein - wobei eine Seitenwand der Halbschale hochgezogen ist - wie in Fig. 1 oder es kann ein Blechteil als Halbschale und das zweite Blechteil kreisringförmig mit Winkelprofil wie in Fig. 2 ausgebildet sein.The two sheet metal parts can z. B. as a circular half-shells be formed - wherein a side wall of the half-shell is pulled up - as in Fig. 1 or it may be a sheet metal part as a half-shell and the second sheet metal part with circular Angular profile as shown in Fig. 2 may be formed.
Die beiden Hälften des Kühlkanals sind im Regelfall miteinander verschweißt. The two halves of the cooling channel are usually together welded.
Unter Umständen ist es aber auch denkbar, bei sich überlappenden Kühlkanalhälften und bei einer exakten Anlage der Hälften aneinander auf die Schweißnaht zu verzichten. Dabei müssen beide Blechhälften auch beim üblichen Alfinieren und beim Eingießen so aneinanderliegen, daß keine Schmelze in den Kühlkanal eindringen kann.Under certain circumstances, it is also conceivable, in overlapping Cooling channel halves and at a precise investment of Halves together to dispense with the weld. there Both halves of the sheet must also in the usual Alfinieren and when pouring against each other so that no melt in can penetrate the cooling channel.
Der durch die zusätzliche Schweißnaht entstehende Aufwand ist vergleichsweise gering. Allerdings müssen die beiden zu verschweißenden Hälften des Blechkühlkanals - insbesondere wenn die Blechteile stumpf gegeneinander geschweißt werden sollen - exakt gefertigt sein und es müssen Maßnahmen getroffen werden, um einen Verzug beim Schweißen zu vermeiden.The resulting from the additional weld effort is comparatively low. However, the two have to welded halves of the sheet metal cooling channel - in particular when the sheet metal parts are butt welded against each other should - be made exactly and measures must be taken to avoid warping during welding.
Insbesondere können die Teile des Blechkühlkanals in die Nutbewehrung eingepreßt und zusätzlich können am Ringträger Zentrierungen bzw. am Ringträgerrücken Absätze angedreht sein, an denen das Blechteil anliegt.In particular, the parts of the sheet metal cooling channel in the Slot reinforcement pressed in and additionally can on the ring carrier Centering or turned on the ring carrier back heels be, on which the sheet metal part rests.
Dieses Problem tritt bei einer Überlappung der zu verschweißenden Bleche nicht im selben Maße auf.This problem occurs with an overlap of the welds Do not plate to the same extent.
Die Erfindung wird im folgenden anhand eines Ausführungsbeispiels näher erläutert. Es zeigt:
- Fig. 1
- einen erfindungsgemäßen Ringträger mit zweiteiligem Blechkühlkanal
- Fig. 2
- eine weitere Ausführungsform eines erfindungsgemäßen Ringträgers.
- Fig. 1
- a ring carrier according to the invention with two-part sheet metal cooling channel
- Fig. 2
- a further embodiment of a ring carrier according to the invention.
Der Kolben 1 weist einen gekühlten Ringträger 2 auf, der
aus einer massiven, kreisrunden Nutbewehrung 3 aus Niresist-Material
und einem mit der Nutbewehrung 3 verschweißten
Blechkühlkanal 4 besteht, der wiederum aus 2 miteinander
verschweißten Kanalhälften 5 und 6 besteht.The
Die radial äußere Begrenzung des Kühlkanals ist durch die
radial innere Wand der Nutbewehrung 3 gebildet.The radially outer boundary of the cooling channel is through the
formed radially inner wall of the
Claims (3)
- Ring carrier (2) for a piston (1) of an internal-combustion engine with a sheet metal cooling duct (4) welded to the ring carrier (2), characterised in that the sheet metal cooling duct (4) consists of two sheet metal parts (5, 6).
- Ring carrier for a piston according to claim 1, characterised in that the sheet metal cooling duct (4) comprises a horizontal division.
- Ring carrier according to any one of the preceding claims, characterised in that the two parts (5, 6) of the sheet metal cooling duct (4) overlap in the region of the weld seam.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1998121316 DE19821316A1 (en) | 1998-05-13 | 1998-05-13 | Ring carrier for a piston of an internal combustion engine |
| DE19821316 | 1998-05-13 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0957256A2 EP0957256A2 (en) | 1999-11-17 |
| EP0957256A3 EP0957256A3 (en) | 2000-04-12 |
| EP0957256B1 true EP0957256B1 (en) | 2003-06-25 |
Family
ID=7867564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19990107244 Expired - Lifetime EP0957256B1 (en) | 1998-05-13 | 1999-04-14 | Ring carrier for an internal combustion engine piston |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0957256B1 (en) |
| DE (1) | DE19821316A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10007616B4 (en) * | 2000-02-18 | 2008-08-28 | Federal-Mogul Nürnberg GmbH | Ring carrier with cooling channel |
| DE10057366A1 (en) * | 2000-11-18 | 2002-05-23 | Mahle Gmbh | Method for producing a piston with cooled ring carrier |
| DE10221209B4 (en) * | 2002-05-13 | 2005-10-27 | Ks Kolbenschmidt Gmbh | Ring carrier with cooling channel for a piston |
| DE102008031864A1 (en) * | 2008-07-05 | 2010-01-07 | Mahle International Gmbh | Insert for piston of internal combustion engine i.e. diesel engine, has supporting and cavity base parts that are arranged radially at distance from each other and connected with one another by covers, such that cooling channel is formed |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE7212560U (en) * | 1972-06-29 | Alcan Gmbh | Heavy metal ring carrier for pistons | |
| FR2044242A5 (en) * | 1969-05-13 | 1971-02-19 | Ass Eng Ltd | Moulding motor pistons |
| DE2624412C3 (en) * | 1976-05-31 | 1983-12-01 | Alcan Aluminiumwerk Nürnberg GmbH, 6000 Frankfurt | Process for the production of pistons with an annular channel |
| JPS6441648A (en) * | 1987-04-21 | 1989-02-13 | Hino Motors Ltd | Wear resistant ring with cooling cavity for piston and manufacture thereof |
| US4907545A (en) * | 1988-12-28 | 1990-03-13 | Caterpillar Inc. | Liquid cooled piston ring carrier assembly and piston using same |
| JPH05240347A (en) * | 1992-02-26 | 1993-09-17 | Hino Motors Ltd | Piston abrasion-proof ring for engine |
-
1998
- 1998-05-13 DE DE1998121316 patent/DE19821316A1/en not_active Withdrawn
-
1999
- 1999-04-14 EP EP19990107244 patent/EP0957256B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP0957256A2 (en) | 1999-11-17 |
| DE19821316A1 (en) | 1999-11-18 |
| EP0957256A3 (en) | 2000-04-12 |
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