DE10011155A1 - Aluminium piston, particularly for diesel engine, has intermetallic ring support-cooling channel combination connected with basic material - Google Patents

Aluminium piston, particularly for diesel engine, has intermetallic ring support-cooling channel combination connected with basic material

Info

Publication number
DE10011155A1
DE10011155A1 DE10011155A DE10011155A DE10011155A1 DE 10011155 A1 DE10011155 A1 DE 10011155A1 DE 10011155 A DE10011155 A DE 10011155A DE 10011155 A DE10011155 A DE 10011155A DE 10011155 A1 DE10011155 A1 DE 10011155A1
Authority
DE
Germany
Prior art keywords
ring carrier
sheet metal
metal part
piston
flank
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.)
Withdrawn
Application number
DE10011155A
Other languages
German (de)
Inventor
Peter Kemnitz
Hanspeter Wieland
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mahle GmbH
Original Assignee
Mahle GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mahle GmbH filed Critical Mahle GmbH
Priority to DE10011155A priority Critical patent/DE10011155A1/en
Publication of DE10011155A1 publication Critical patent/DE10011155A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J9/00—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction
    • F16J9/12—Details
    • F16J9/22—Rings for preventing wear of grooves or like seatings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
    • F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
    • F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
    • F02B23/0672—Omega-piston bowl, i.e. the combustion space having a central projection pointing towards the cylinder head and the surrounding wall being inclined towards the cylinder center axis
    • 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
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J1/00—Pistons; Trunk pistons; Plungers
    • F16J1/09—Pistons; Trunk pistons; Plungers with means for guiding fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J9/00—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00—Metals
    • F05C2201/02—Light metals
    • F05C2201/021—Aluminium
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Abstract

The aluminium piston (1), particularly for a diesel engine, has an intermediate ring support-cooling channel combination (2) connected with the basic material. The ring support has upper and lower flanks (3,4) running approximately radially to the piston central axis and a plate part connected to the upper and lower flanks of the ring support. The plate part, in common with the ring support, forms a cooling channel and in the ring support at least one groove is formed. The plate part, on at least one flank of the ring support, extends radially outwards over a radius (RN) corresponding to the groove base and over a length of additionally at least 50 per cent of the groove depth.

Description

Die Erfindung betrifft einen Aluminium-Kolben für Verbren­ nungsmotoren, insbesondere Dieselmotoren, mit einer inter­ metallisch mit dem Grundmaterial verbundenen Ringträger- Kühlkanal-Kombination nach dem Oberbegriff des Anspruchs 1.The invention relates to an aluminum piston for burning voltage engines, especially diesel engines, with an inter ring carrier connected metallically to the base material Cooling channel combination according to the preamble of claim 1.

Derartige Kolben sind bekannt aus der FR 2044242, der DE 72 12 560 U, der DE 26 24 412 A, der DE 76 17 370 U, der US 4,907,545, der JP 4-300466 A, der JP 5-69240 A, JP 5-240347 A und der JP 11-82738 A.Such pistons are known from FR 2044242, the DE 72 12 560 U, DE 26 24 412 A, DE 76 17 370 U, the US 4,907,545, JP 4-300466 A, JP 5-69240 A, JP 5-240347 A and JP 11-82738 A.

Bei allen bekannten Ringträger-Kühlkanal-Kombinationen wird ein Blechteil an den Ringträger angesetzt, entweder mit stumpfem Stoß oder mit Überlappung. Wenn das Blechteil mit Überlappung an die obere oder untere Flanke eines Ringträ­ gers angesetzt und verschweißt wird, so wird die Länge der Überlappung regelmäßig klein gehalten und auf das Maß be­ grenzt, das zur Erzielung einer brauchbaren Schweißverbin­ dung notwendig ist. Es sind keine Ringträger-Kühlkanal-Kom­ binationen bekannt, bei denen ein Blechteil mit Überlappung an die Flanken eines Ringträgers angesetzt ist und das Blechteil die Flanken des Ringträgers nach radial außen deutlich über den Nutgrundradius hinweg überlappt.In all known ring carrier-cooling channel combinations a sheet metal part attached to the ring carrier, either with butt joint or with overlap. If the sheet metal part with Overlap on the upper or lower flank of a ring beam gers is attached and welded, the length of the Overlap regularly kept small and be to the measure limits that to achieve a usable weld joint is necessary. They are not ring carrier cooling channel com binations known in which a sheet metal part with overlap is attached to the flanks of a ring carrier and that Sheet metal part the flanks of the ring carrier radially outwards clearly overlaps across the groove base radius.

Bei hoch belasteten gattungsgemäßen Dieselkolben besteht die Gefahr einer Schädigung der intermetallischen Bindung.In the case of highly loaded generic diesel pistons the risk of damage to the intermetallic bond.

Die Erfindung beschäftigt sich daher mit dem Problem, Bin­ dungsrisse in der intermetallischen Bindung zu vermeiden. The invention is therefore concerned with the problem, Bin avoid cracks in the intermetallic bond.  

Dieses Problem wird gelöst durch die kennzeichnenden Merk­ male des Anspruchs 1. Vorteilhafte Weiterbildungen sind Ge­ genstand der Unteransprüche.This problem is solved by the characteristic note male of claim 1. Advantageous further developments are Ge subject of the subclaims.

Durch die weitgehende Überlappung der Flanken des Ringträ­ gers durch das Blechteil wird in kritischen Bereichen das Spannungsniveau vermindert. Gemäß Anspruch 1 wird ausgehend von einem dem Nutgrunddurchmesser entsprechenden Radius ei­ ne Erstreckung des Blechteils in radialer Richtung und eine entsprechende Überlappung des Ringträgers an zumindest ei­ ner Nutflanke durch das Blechteil über mindestens zusätz­ lich 50% der Nuttiefe beansprucht.Due to the extensive overlap of the flanks of the Ringträ gers through the sheet metal part in critical areas Voltage level decreased. According to claim 1 is starting from a radius corresponding to the groove base diameter ei ne extension of the sheet metal part in the radial direction and one corresponding overlap of the ring carrier on at least egg ner flank through the sheet metal part via at least additional 50% of the groove depth.

Im Idealfall werden Oberflanke und Unterflanke des Ringträ­ gers komplett vom Blechteil überlappt.Ideally, the top flank and bottom flank of the ring beam completely overlapped by the sheet metal part.

Das Einformen des Ringträgers in das Blechteil erfolgt vor­ zugsweise, indem der Ringträger auf ein zunächst ebenes kreisringförmiges Blechteil gelegt wird und anschließend das Blech um den Ringträger herumgeformt wird, wie in der DE 26 24 412 A beschrieben.The ring carrier is molded into the sheet metal part before preferably by placing the ring carrier on an initially flat surface circular sheet metal part is placed and then the sheet is formed around the ring carrier, as in the DE 26 24 412 A described.

Die Flanken des Ringträgers müssen nicht notwendigerweise exakt radial verlaufen - wie in den Zeichnungen dargestellt -, sondern können durchaus bis zu 20° Abwei­ chung vom exakt radialen Verlauf aufweisen. Dadurch kann z. B. der Kühlkanal etwas höher ausgeführt werden als der Ringträger.The flanks of the ring carrier do not necessarily have to run exactly radially - as in the drawings shown -, but can quite up to 20 ° deviation have the exact radial course. This can, for. B. the cooling channel is designed to be slightly higher than that Ring bearer.

Die das Blechteil und den Ringträger verbindenden Schweiß­ nähte können entweder als Radialnähte etwa parallel zu den Flanken des Ringträgers oder als Axialnähte senkrecht zu den Flanken des Ringträgers liegen.The sweat connecting the sheet metal part and the ring carrier Seams can either be radial seams approximately parallel to the Flanks of the ring carrier or as axial seams perpendicular to the flanks of the ring bearer.

Die Erfindung wird im folgenden anhand von Zeichnungen nä­ her erläutert. Es zeigt:The invention is based on drawings ago explained. It shows:

Fig. 1 einen erfindungsgemäßen Kolben im Querschnitt Fig. 1 shows a piston according to the invention in cross section

Fig. 2 eine Ringträger-Kühlkanal-Kombination mit Radialschweißnähten Fig. 2 is a ring carrier-cooling channel combination with radial welds

Fig. 3 eine Ringträger-Kühlkanal-Kombination mit Axialschweißnähten Fig. 3 is a ring carrier-cooling channel combination with axial welds

Fig. 4 eine zweite Ringträger-Kühlkanal-Kombination mit Axialschweißnähten. Fig. 4 shows a second ring carrier-cooling channel combination with axial welds.

In der Zeichnung ist der Nutgrundradius als Bezugsmaß mit RN bezeichnet.In the drawing, the base groove radius is included as a reference dimension Designated RN.

Ein DI-Dieselkolben 1 weist eine Ringträger-Kühlkombination mit einem Ringträger 2 mit einer oberen Flanke 3 und einer unteren Flanke 4 und mit einem Blechteil 5 auf. Das Blech­ teil 5 erstreckt sich in Richtung nach radial außen an der unteren Flanke 4 ausgehend vom Nutgrundradius 8 einer Nut 7 über die gesamte Nuttiefe T und an der oberen Flanke 3 aus­ gehend vom Nutgrundradius über etwas mehr als 50% der Nut­ tiefe. Das Blechteil überlappt daher in radialer Richtung nicht nur - wie im Stand der Technik bekannt - ein Stegteil 6 des Ringträgers, sondern auch zumindest 50% der Nuttiefe gerechnet ab Nutgrundradius RN.A DI diesel piston 1 has a ring carrier cooling combination with a ring carrier 2 with an upper flank 3 and a lower flank 4 and with a sheet metal part 5 . The sheet metal part 5 extends radially outwards on the lower flank 4 starting from the groove base radius 8 of a groove 7 over the entire groove depth T and on the upper flank 3 going from the groove base radius over a little more than 50% of the groove depth. The sheet metal part therefore not only overlaps in the radial direction - as is known in the prior art - a web part 6 of the ring carrier, but also at least 50% of the groove depth calculated from the groove base radius RN.

In den Fig. 2, 3 und 4 ist die Lage der Radialschweiß­ nähte und der Axialschweißnähte dargestellt.In Figs. 2, 3 and 4, the position of the radial weld seams is shown the Axialschweißnähte.

Claims (7)

1. Aluminium-Kolben (1) für Verbrennungsmotoren, insbeson­ dere Dieselmotoren, mit einer intermetallisch mit dem Grundmaterial verbundenen Ringträger-Kühlkanal-Kombina­ tion (2) mit einem Ringträger, der eine obere und eine untere, etwa radial zur Kolbenmittelachse verlaufende Flanke (3, 4) aufweist und einem schweißtechnisch mit dem Ringträger an der oberen und der unteren Flanke (3, 4) verbundenen Blechteil (5), das gemeinsam mit dem Ringträger einen Kühlkanal bildet und wobei in dem Ringträger mindestens eine Nut (7) eingestochen ist, dadurch gekennzeichnet, daß das Blechteil (5) sich an zumindest einer Flanke (3, 4) des Ringträgers in etwa radialer Richtung nach außen über den dem Nutgrund (8) entsprechenden Radius RN hinaus über eine Länge von zusätzlich mindestens 50% der Nuttiefe T erstreckt.1.Aluminum pistons ( 1 ) for internal combustion engines, in particular diesel engines, with an intermetallic ring carrier-cooling channel combination ( 2 ) connected to the base material with a ring carrier which has an upper and a lower flank (approximately radially to the piston center axis) ( 3 , 4 ) and a sheet metal part ( 5 ) which is welded to the ring carrier on the upper and lower flanks ( 3 , 4 ) and which forms a cooling channel together with the ring carrier and at least one groove ( 7 ) is pierced in the ring carrier, characterized in that the sheet metal part ( 5 ) extends on at least one flank ( 3 , 4 ) of the ring carrier in an approximately radial direction outward beyond the radius RN corresponding to the groove base ( 8 ) over a length of an additional at least 50% of the groove depth T. . 2. Kolben für Verbrennungsmotoren nach Anspruch 1, dadurch gekennzeichnet, daß sich das Blechteil (5) an zumindest einer Flanke (3, 4) des Ringträgers in etwa radialer Richtung nach außen über den dem Nutgrund (8) entsprechenden Radius RN hinaus über eine Länge von zusätzlich mindestens 70% der Nuttiefe T erstreckt. 2. Piston for internal combustion engines according to claim 1, characterized in that the sheet metal part ( 5 ) on at least one flank ( 3 , 4 ) of the ring carrier in an approximately radial direction outwards over the groove RN ( 8 ) corresponding radius RN over a length of an additional at least 70% of the groove depth T. 3. Kolben für Verbrennungsmotoren nach Anspruch 2, dadurch gekennzeichnet, daß sich das Blechteil (5) an zumindest einer Flanke (3, 4) des Ringträgers in etwa radialer Richtung nach außen über den dem Nutgrund (8) entsprechenden Radius RN hinaus über eine Länge von zusätzlich mindestens 85% der Nuttiefe T erstreckt.3. Piston for internal combustion engines according to claim 2, characterized in that the sheet metal part ( 5 ) on at least one flank ( 3 , 4 ) of the ring carrier in an approximately radial direction outwards over the radius RN corresponding to the groove base ( 8 ) over a length extends from at least 85% of the groove depth T. 4. Kolben für Verbrennungsmotoren nach Anspruch 3, dadurch gekennzeichnet, daß sich das Blechteil (5) an zumindest einer Flanke (3, 4) des Ringträgers in radialer Richtung nach außen über die gesamte Länge der Flanke (3, 4) erstreckt.4. Piston for internal combustion engines according to claim 3, characterized in that the sheet metal part ( 5 ) on at least one flank ( 3 , 4 ) of the ring carrier extends radially outwards over the entire length of the flank ( 3 , 4 ). 5. Kolben nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß sich das Blechteil (5) an beiden Flanken (3, 4) gleichweit radial nach außen erstreckt.5. Piston according to one of the preceding claims, characterized in that the sheet metal part ( 5 ) extends equally far radially outwards on both flanks ( 3 , 4 ). 6. Kolben für Verbrennungsmotoren nach einem der vorherge­ henden Ansprüche, dadurch gekennzeichnet, daß die Verbindung von Ringträger und Blechteil (5) als Laserschweißnaht oder Elektronenstrahlschweißnaht aus­ gebildet ist.6. Piston for internal combustion engines according to one of the preceding claims, characterized in that the connection of the ring carrier and sheet metal part ( 5 ) is formed as a laser weld or electron beam weld. 7. Kolben für Verbrennungsmotoren nach einem der vorherge­ henden Ansprüche, dadurch gekennzeichnet, daß die Schweißnähte als Radialnähte ausgeführt sind.7. Pistons for internal combustion engines according to one of the previous existing claims, characterized, that the welds are designed as radial seams.
DE10011155A 2000-03-07 2000-03-07 Aluminium piston, particularly for diesel engine, has intermetallic ring support-cooling channel combination connected with basic material Withdrawn DE10011155A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE10011155A DE10011155A1 (en) 2000-03-07 2000-03-07 Aluminium piston, particularly for diesel engine, has intermetallic ring support-cooling channel combination connected with basic material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE10011155A DE10011155A1 (en) 2000-03-07 2000-03-07 Aluminium piston, particularly for diesel engine, has intermetallic ring support-cooling channel combination connected with basic material

Publications (1)

Publication Number Publication Date
DE10011155A1 true DE10011155A1 (en) 2001-09-13

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DE (1) DE10011155A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003054371A1 (en) * 2001-12-21 2003-07-03 Karl Merz Piston ring carrier with a cooling channel
DE102006043302A1 (en) * 2006-09-14 2008-03-27 Mahle International Gmbh Ring carrier for piston of combustion engine, has cooling duct part firmly connected together with ring carrier part to form closed cooling duct, where gas-impermeable barrier layer is integrated in ring carrier part at cooling duct
DE102006043301A1 (en) * 2006-09-14 2008-03-27 Mahle International Gmbh Ring support has ring support part and cooling channel part, which is connected with ring support part and formed together with ring support part of closed cooling channel, and surface of ring support part that pointing to cooling channel
WO2008122259A1 (en) * 2007-04-05 2008-10-16 Mahle International Gmbh Piston for an internal combustion engine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE695709C (en) * 1938-08-17 1940-08-31 Argus Motoren Ges M B H Pistons for two-stroke engines

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE695709C (en) * 1938-08-17 1940-08-31 Argus Motoren Ges M B H Pistons for two-stroke engines

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
JP 03138438 A.,In: Patent Abstracts of Japan *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003054371A1 (en) * 2001-12-21 2003-07-03 Karl Merz Piston ring carrier with a cooling channel
DE102006043302A1 (en) * 2006-09-14 2008-03-27 Mahle International Gmbh Ring carrier for piston of combustion engine, has cooling duct part firmly connected together with ring carrier part to form closed cooling duct, where gas-impermeable barrier layer is integrated in ring carrier part at cooling duct
DE102006043301A1 (en) * 2006-09-14 2008-03-27 Mahle International Gmbh Ring support has ring support part and cooling channel part, which is connected with ring support part and formed together with ring support part of closed cooling channel, and surface of ring support part that pointing to cooling channel
WO2008122259A1 (en) * 2007-04-05 2008-10-16 Mahle International Gmbh Piston for an internal combustion engine

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