EP1546535B1 - Multi-part cooled piston for an internal combustion engine - Google Patents

Multi-part cooled piston for an internal combustion engine Download PDF

Info

Publication number
EP1546535B1
EP1546535B1 EP03769200A EP03769200A EP1546535B1 EP 1546535 B1 EP1546535 B1 EP 1546535B1 EP 03769200 A EP03769200 A EP 03769200A EP 03769200 A EP03769200 A EP 03769200A EP 1546535 B1 EP1546535 B1 EP 1546535B1
Authority
EP
European Patent Office
Prior art keywords
piston
pistons
fact
holes
accordance
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 - Fee Related
Application number
EP03769200A
Other languages
German (de)
French (fr)
Other versions
EP1546535A1 (en
Inventor
Peter Kemnitz
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=31502554&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1546535(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Mahle GmbH filed Critical Mahle GmbH
Publication of EP1546535A1 publication Critical patent/EP1546535A1/en
Application granted granted Critical
Publication of EP1546535B1 publication Critical patent/EP1546535B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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 
    • F02F3/16—Pistons  having cooling means
    • F02F3/20—Pistons  having cooling means the means being a fluid flowing through or along piston
    • F02F3/22—Pistons  having cooling means the means being a fluid flowing through or along piston the fluid being liquid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F3/00—Pistons 
    • 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 
    • F02F3/0084—Pistons  the pistons being constructed from specific materials
    • 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 multi-part cooled piston for an internal combustion engine according to the preamble of claim 1.
  • a multi-part cooled piston for an internal combustion engine is from the JP 61175255 A known.
  • This piston shows at the level of the ring portion of the piston a number of ribs, between which a heat-insulating plate for minimizing the heat transfer from the combustion bowl to the ring section is arranged.
  • a pendulum piston which consists of a piston body with a piston upper part and formed thereon with pin bosses and a separate shaft part, which is connected by means of piston pin with the piston body.
  • the pendulum piston has an annular cooling channel, which is bounded partly by the upper piston part and partly by the shaft part, and also has no technical features that improve the cooling effect of flowing in the cooling channel cooling oil.
  • the invention is therefore based on the object to provide a multi-part cooled piston, which is inexpensive to produce with a sufficient dimensional stability and a cooling system with improved cooling effect.
  • the cooling channel can be formed closer to the piston crown or combustion bowl and nevertheless has excellent dimensional stability.
  • the arrangement of the support ribs a kind of chamber formation in the cooling channel, d. h., A generation of shaker chambers, whereby an extension of the residence time of the cooling oil and thus an improved heat dissipation of the piston areas to be cooled is achieved.
  • the multi-part cooled piston 20 consists of a forged piston upper part 1 with a combustion bowl 3, ring wall 4 with ring portion 11 and a (upper, towards the piston head) part of a cooling channel 7 and a piston lower part 2, the (lower, the piston shaft 9 out ) Part of a cooling channel 7, a piston shaft 9 and hub supports 6, as shown Fig. 5 can be seen.
  • holes 14 are provided in the cooling channel 7, which are arranged distributed symmetrically on the circumference and in the direction of the piston crown, ie parallel to the piston longitudinal axis K, are introduced.
  • the depth h B of the holes is at most half the total height H of the cooling channel 7, so that an unhindered cooling oil circuit is ensured.
  • FIGS. 3 and 4 show, between the holes 14 designated as support ribs 8 material areas go radially to the piston longitudinal axis K in sections of an annular rib 5, which forms the annular rib 5 in its entirety.
  • the holes 14 and thus the support ribs 8 are, as in Fig. 4 represented, distributed radially symmetrically over the circumference of the cooling channel 7 arranged.
  • the distribution can be designed such that in pressure-back pressure direction D, GD of the piston 20, a larger number of holes 14 and thus support ribs 8 is arranged, as transverse to it, ie, a single-ended circumferential distribution in Cooling channel 7 takes place.
  • the distribution of the bores 14 and thus of the support ribs 8 in the cooling channel 7 when it is characterized according to the quadrant formed by the piston main axes K H I - IV be such that within a quadrant a symmetric ( Figure 6 ) or unbalanced distribution (not shown) is provided, which in the opposite quadrant, ie I. and III. or II. and IV., finds again.
  • the holes 14 can thereby by round holes, as in the FIGS. 4 and 6 shown, or oblong holes (not shown), which are aligned with its long side in the direction of the piston center radially outward to the piston wall.
  • the tips of the holes 14 may be round or, as in Fig. 1 shown to be angled.
  • the axes of the holes 14 can, as Fig. 1 shows, parallel to the piston longitudinal axis K and / or, that is, in combination, to be arranged at an acute angle thereto, the bores 14 pointing in the direction of the combustion bowl 3.
  • annular circumferential support rib 10 is formed, as seen from Fig. 3 can be seen, which corresponds in their geometric dimensions with the annular rib 5.
  • the upper piston part 1 and the lower piston part 2 are permanently connected to each other via the supporting and annular ribs 10 and 5 by means of a welding or soldering process, subsequently finishing the piston 20 to a piston which can be used in a motor by means of machining.
  • the upper piston part 1 is advantageously made of an oxidation-resistant and / or heat-resistant material and the lower piston part 2 of a precipitation-hardening ferritic-pearlitic steel or tempered steel.
  • the outer piston wall regions between two piston parts 1 and 2 form a bearing surface, which is characterized by a few tenths of a millimeter wide gap 13. This can remain open or be sealed by means of a temperature-resistant sealing ring, which is positioned before joining both piston parts 1 and 2 on one of the bearing surfaces, for example, the piston lower part 2.

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)
  • Fuel-Injection Apparatus (AREA)

Abstract

The invention relates to a multi-part cooled piston (20) for an internal combustion engine, said piston comprising a steel piston upper part (1) provided with a combustion cavity (3) and an annular wall (4) having an annular part (11), in addition to a piston lower part (2) comprising a box-type piston shaft (9), hubs (12) for receiving the piston pin connecting the piston (20) to the connecting rod, and hub supports (6) connected to the piston shaft (9).The aim of the invention is to produce one such piston with high dimensional stability and an improved cooling system in a cost-effective manner. To this end, a cooling channel (7) formed inside the piston upper part (1) comprises bore holes (14) distributed about the circumference thereof and oriented towards the bottom of the piston; the piston material located between the bore holes (14) forms support ribs (8) which respectively form sections of a surrounding annular rib (5), radially in relation to the longitudinal axis (K) of the piston; the lower part (2) of the piston comprises a surrounding carrier rib (10) which is connected to the hub supports (6); and the piston upper part (1) and the piston lower part (2) are interconnected by means of the annular rib and the carrier rib (5, 10) in a fixed manner.

Description

Die Erfindung betrifft einen mehrteiligen gekühlten Kolben für einen Verbrennungsmotor nach dem Oberbegriff des Anspruches 1.The invention relates to a multi-part cooled piston for an internal combustion engine according to the preamble of claim 1.

Ein mehrteilig gekühlter Kolben für einen Verbrennungsmotor ist aus der JP 61175255 A bekannt. Dieser Kolben zeigt in Höhe der Ringpartie des Kolbens eine Anzahl von Rippen, zwischen denen eine wärmedämmende Platte zur Minimierung des Wärmetransportes von der Brennraummulde zur Ringpartie angeordnet ist.A multi-part cooled piston for an internal combustion engine is from the JP 61175255 A known. This piston shows at the level of the ring portion of the piston a number of ribs, between which a heat-insulating plate for minimizing the heat transfer from the combustion bowl to the ring section is arranged.

Aus der WO 00/77379 A1 ist ein weiterer Kolben für einen Verbrennungsmotor bekannt, der zur Verbesserung der Wärmeabfuhr im Kühlkanal ein Wandteil mit mehreren radial angeordneten aus dünnem Blech bestehende Querwände aufweist.From the WO 00/77379 A1 Another piston for an internal combustion engine is known, which has a wall portion with a plurality of radially arranged thin sheet metal transverse walls to improve the heat dissipation in the cooling channel.

Aus der US-PS 4,581,983 ist ein zweiteiliger Kolben mit einem aus Stahl geschmiedeten Oberteil bekannt, der einen in Kolbenbodennähe angeordneten, ringförmigen Kühlkanal aufweist. Dieser aus dem Stand der Technik bekannte Kühlkanal weist keine technischen Merkmale auf, die die Kühlwirkung des im Kühlkanal fließenden Kühlöles verbessern.From the U.S. Patent 4,581,983 is a two-piece piston with a steel forged upper part is known, which has a piston near the bottom, arranged annular cooling channel. This known from the prior art cooling channel has no technical features that improve the cooling effect of flowing in the cooling channel cooling oil.

Aus der US-PS 5,483,869 ist ein Pendelschaftkolben bekannt, der aus einem Kolbengrundkörper mit einem Kolbenoberteil und mit daran angeformten Bolzennaben und aus einem separaten Schaftteil besteht, das mittels Kolbenbolzen mit dem Kolbengrundkörper verbunden ist. Der Pendelschaftkolben weist einen ringförmigen Kühlkanal auf, der teils vom Kolbenoberteil und teils vom Schaftteil begrenzt wird, und der ebenfalls keine technische Merkmale aufweist, die die Kühlwirkung des im Kühlkanal fließenden Kühlöles verbessern.From the U.S. Patent 5,483,869 a pendulum piston is known, which consists of a piston body with a piston upper part and formed thereon with pin bosses and a separate shaft part, which is connected by means of piston pin with the piston body. The pendulum piston has an annular cooling channel, which is bounded partly by the upper piston part and partly by the shaft part, and also has no technical features that improve the cooling effect of flowing in the cooling channel cooling oil.

Die vorgenannten Konstruktionen sind nicht geeignet, den Kolben hinsichtlich seiner Stabilität für hohe Zünddrücke und Temperaturen, wie sie bei modernen Dieselmotoren auftreten, zu verbessern.The above constructions are not suitable to improve the piston in terms of its stability for high ignition pressures and temperatures, such as occur in modern diesel engines.

Der Erfindung liegt daher die Aufgabe zugrunde, einen mehrteiligen gekühlten Kolben anzugeben, der mit einer ausreichenden Formstabilität und einem Kühlsystem mit verbesserter Kühlwirkung kostengünstig herstellbar ist.The invention is therefore based on the object to provide a multi-part cooled piston, which is inexpensive to produce with a sufficient dimensional stability and a cooling system with improved cooling effect.

Gelöst wird die Aufgabe mit den im Kennzeichen des Hauptanspruches stehenden Merkmalen.The problem is solved with the features in the characterizing part of the main claim.

Bei einem derart hergestellten Kolben kann der Kühlkanal näher in Richtung Kolbenboden bzw. Verbrennungsmulde ausgeformt werden und weist trotzdem eine ausgezeichnete Formstabilität auf. Außerdem erfolgt durch die Anordnung der Stützrippen eine Art Kammerbildung im Kühlkanal, d. h., eine Erzeugung von Shaker-Räumen, wodurch eine Verlängerung der Verweildauer des Kühlöls und damit eine verbesserte Wärmeableitung der zu kühlenden Kolbenbereiche erreicht wird.In the case of a piston produced in this way, the cooling channel can be formed closer to the piston crown or combustion bowl and nevertheless has excellent dimensional stability. In addition, the arrangement of the support ribs a kind of chamber formation in the cooling channel, d. h., A generation of shaker chambers, whereby an extension of the residence time of the cooling oil and thus an improved heat dissipation of the piston areas to be cooled is achieved.

Vorteilhafte Weiterbildungen sind Gegenstand der Unteransprüche.Advantageous developments are the subject of the dependent claims.

Die Erfindung wird im Folgenden anhand eines Ausführungsbeispiels näher erläutert. Es zeigt:

Fig. 1
einen erfindungsgemäßen Kolben im Querschnitt, geschnitten in Bolzenrichtung;
Fig. 2
einen erfindungsgemäßen Kolben in Unteransicht, geschnitten entlang der Linie II gemäß Fig. 1;
Fig. 3
einen erfindungsgemäßen Kolben im Querschnitt, geschnitten quer zur Kolbenbolzenrichtung;
Fig. 4
einen erfindungsgemäßen Kolben, geschnitten entlang der Linie IV-IV aus Fig.1;
Fig. 5
einen erfindungsgemäßen Kolben in perspektivischer Ansicht;
Fig. 6
einen erfindungsgemäßen Kolben, geschnitten entlang der Linie IV-IV aus Fig.1, in einem weiteren Ausführungsbeispiel.
The invention is explained in more detail below with reference to an embodiment. It shows:
Fig. 1
a piston according to the invention in cross section, cut in the direction of the bolt;
Fig. 2
a piston according to the invention in a bottom view, taken along the line II according to Fig. 1 ;
Fig. 3
a piston according to the invention in cross section, cut transversely to the piston pin direction;
Fig. 4
a piston according to the invention, taken along the line IV-IV Fig.1 ;
Fig. 5
a piston according to the invention in a perspective view;
Fig. 6
a piston according to the invention, taken along the line IV-IV Fig.1 in another embodiment.

Der erfindungsgemäße mehrteilig gekühlte Kolben 20 besteht aus einem geschmiedeten Kolbenoberteil 1 mit einer Verbrennungsmulde 3, Ringwand 4 mit Ringpartie 11 und einem (oberen, zum Kolbenboden hin) Teil eines Kühlkanals 7 sowie aus einem Kolbenunterteil 2, das einen (unteren, zum Kolbenschaft 9 hin) Teil eines Kühlkanals7, einen Kolbenschaft 9 sowie Nabenabstützungen 6, wie aus Fig. 5 ersichtlich, umfasst. Gemäß Ausführungsbeispiel sind im Kühlkanal 7 Bohrungen 14 vorgesehen, die auf dem Umfang symmetrisch verteilt angeordnet und in Richtung des Kolbenbodens, d. h. parallel zur Kolbenlängsachse K, eingebracht sind. Die Tiefe hB der Bohrungen beträgt maximal die Hälfte der Gesamthöhe H des Kühlkanals 7, sodass ein ungehinderter Kühlölkreislauf gewährleistet bleibt. Durch diese Konstruktion werden Shaker-Räume für das Kühlöl geschaffen, welche die Kühlwirkung erhöhen. In den Figuren ist der jeweilige Ölein- und Ölauslass nicht dargestellt.The multi-part cooled piston 20 according to the invention consists of a forged piston upper part 1 with a combustion bowl 3, ring wall 4 with ring portion 11 and a (upper, towards the piston head) part of a cooling channel 7 and a piston lower part 2, the (lower, the piston shaft 9 out ) Part of a cooling channel 7, a piston shaft 9 and hub supports 6, as shown Fig. 5 can be seen. According to the embodiment, holes 14 are provided in the cooling channel 7, which are arranged distributed symmetrically on the circumference and in the direction of the piston crown, ie parallel to the piston longitudinal axis K, are introduced. The depth h B of the holes is at most half the total height H of the cooling channel 7, so that an unhindered cooling oil circuit is ensured. By this construction, shaker spaces are created for the cooling oil, which increase the cooling effect. In the figures, the respective oil inlet and oil outlet is not shown.

Wie die Figuren 3 und 4 zeigen, gehen die zwischen den Bohrungen 14 als Stützrippen 8 bezeichneten Materialbereiche radial zur Kolbenlängsachse K in Abschnitte einer Ringrippe 5 über, die in ihrer Gesamtheit die Ringrippe 5 bildet. Die Bohrungen 14 und damit die Stützrippen 8 sind, wie in Fig. 4 dargestellt, radial symmetrisch über den Umfang des Kühlkanals 7 verteilt angeordnet. In einem weiteren Ausführungsbeispiel (nicht dargestellt) kann die Verteilung derart gestaltet sein, dass in Druck-Gegendruckrichtung D, GD des Kolbens 20 eine größere Anzahl von Bohrungen 14 und damit Stützrippen 8 angeordnet ist, als quer dazu, d. h., eine unsymmetrische umfangsseitige Verteilung im Kühlkanal 7 erfolgt. So kann die Verteilung der Bohrungen 14 und damit der Stützrippen 8 im Kühlkanal 7, wenn dieser nach den durch die Kolbenhauptachsen KH gebildeten Quadranten I - IV charakterisiert wird, derart sein, dass innerhalb eines Quadranten eine symmetrische (Fig.6) oder unsymmetrische Verteilung (nicht dargestellt) vorgesehen ist, die sich in den gegenüberliegenden Quadranten, also I. und III. oder II. und IV., wiederfindet. Dadurch kann im Lastfall den auftretenden Temperatur- und Spannungsbelastungen des Kolbens 20 besser entgegnet werden. Die Bohrungen 14 können dabei durch Rundbohrungen, wie in den Figuren 4 und 6 dargestellt, oder Langlochbohrungen (nicht dargestellt), die mit ihrer langen Seite in Richtung von der Kolbenmitte nach radial außen zur Kolbenwand, ausgerichtet sein. Mit diesen jeweiligen Ausführungsbeispielen der Bohrungsanordnungen wird erreicht, dass diese unterschiedliche Abstände aufweisen und damit das als Stützrippen 8 ausgebildete Material vergrößert wird. Zur weiteren Beeinflussung der Wärmeableitung von der Verbrennungsmulde 3 können die Spitzen der Bohrungen 14 rund oder, wie in Fig. 1 gezeigt, winklig ausgeführt sein.As the FIGS. 3 and 4 show, between the holes 14 designated as support ribs 8 material areas go radially to the piston longitudinal axis K in sections of an annular rib 5, which forms the annular rib 5 in its entirety. The holes 14 and thus the support ribs 8 are, as in Fig. 4 represented, distributed radially symmetrically over the circumference of the cooling channel 7 arranged. In a further embodiment (not shown), the distribution can be designed such that in pressure-back pressure direction D, GD of the piston 20, a larger number of holes 14 and thus support ribs 8 is arranged, as transverse to it, ie, a single-ended circumferential distribution in Cooling channel 7 takes place. Thus, the distribution of the bores 14 and thus of the support ribs 8 in the cooling channel 7 when it is characterized according to the quadrant formed by the piston main axes K H I - IV, be such that within a quadrant a symmetric ( Figure 6 ) or unbalanced distribution (not shown) is provided, which in the opposite quadrant, ie I. and III. or II. and IV., finds again. As a result, in the load case the occurring temperature and stress loads of the piston 20 can be better countered. The holes 14 can thereby by round holes, as in the FIGS. 4 and 6 shown, or oblong holes (not shown), which are aligned with its long side in the direction of the piston center radially outward to the piston wall. With these respective embodiments of the bore arrangements is achieved that they have different distances and thus the material formed as support ribs 8 is increased. To further influence the heat dissipation from the combustion bowl 3, the tips of the holes 14 may be round or, as in Fig. 1 shown to be angled.

Die Achsen der Bohrungen 14 können, wie Fig. 1 zeigt, parallel zur Kolbenlängsachse K und/oder, d. h. in Kombination, in einem spitzen Winkel dazu angeordnet sein, wobei die Bohrungen 14 in Richtung Verbrennungsmulde 3 zeigen.The axes of the holes 14 can, as Fig. 1 shows, parallel to the piston longitudinal axis K and / or, that is, in combination, to be arranged at an acute angle thereto, the bores 14 pointing in the direction of the combustion bowl 3.

Aus den Nabenabstützungen 6 heraus ist eine ringförmig umlaufende Tragrippe 10 ausgebildet, wie aus Fig. 3 ersichtlich, die in ihren geometrischen Abmessungen mit der Ringrippe 5 korrespondiert. Das Kolbenoberteil 1 und Kolbenunterteil 2 ist über die Trag- und Ringrippe 10 bzw. 5 mittels eines Schweiß- oder Lötverfahrens unlösbar miteinander verbunden, wobei nachfolgend eine Endbearbeitung des Kolbens 20 zu einem in einem Motor einsetzbaren Kolben mittels spanabhebender Bearbeitung durchgeführt wird. Das Kolbenoberteil 1 besteht vorteilhaft aus einem oxidationsbeständigen und/oder warmfesten Werkstoff und das Kolbenunterteil 2 aus einem ausscheidungs-härtenden ferritisch-perlitischen Stahl oder Vergütungsstahl.From the hub supports 6 out an annular circumferential support rib 10 is formed, as seen from Fig. 3 can be seen, which corresponds in their geometric dimensions with the annular rib 5. The upper piston part 1 and the lower piston part 2 are permanently connected to each other via the supporting and annular ribs 10 and 5 by means of a welding or soldering process, subsequently finishing the piston 20 to a piston which can be used in a motor by means of machining. The upper piston part 1 is advantageously made of an oxidation-resistant and / or heat-resistant material and the lower piston part 2 of a precipitation-hardening ferritic-pearlitic steel or tempered steel.

Im verbundenen Zustand von Kolbenober- und -unterteil 1 und 2 bilden die äußeren Kolbenwandbereiche zwischen beiden Kolbenteilen 1 und 2 eine Auflagefläche aus, die durch einen wenige zehntel Millimeter breiten Spalt 13 gekennzeichnet ist. Dieser kann offen bleiben oder mittels eines temperaturbeständigen Dichtungsringes, der vor dem Fügen beider Kolbenteile 1 und 2 auf einer der Auflageflächen, beispielsweise der des Kolbenunterteils 2, positioniert wird, abgedichtet sein.In the connected state of Kolbenober- and -unterteil 1 and 2, the outer piston wall regions between two piston parts 1 and 2 form a bearing surface, which is characterized by a few tenths of a millimeter wide gap 13. This can remain open or be sealed by means of a temperature-resistant sealing ring, which is positioned before joining both piston parts 1 and 2 on one of the bearing surfaces, for example, the piston lower part 2.

Bezugszeichenreference numeral

Mehrteilig gekühlter KolbenMulti-piece cooled piston
2020
KolbenoberteilPiston crown
11
KolbenunterteilPiston part
22
Verbrennungsmuldecombustion bowl
33
Ringwandring wall
44
Ringrippeannular rib
55
Nabenabstützungboss support
66
Kühlkanalcooling channel
77
Stützrippensupport ribs
88th
Kolbenschaftpiston shaft
99
Tragrippesupporting rib
1010
Ringpartiering belt
1111
Nabenhub
1212
Spaltgap
1313
Bohrungdrilling
1414
Dichtungpoetry
1515
Kolbenlängsachsepiston longitudinal axis
KK
KolbenhauptachsePiston main axis
KH K H
KühlkanalhöheCooling duct height
HH
Tiefe der BohrungDepth of the hole
hB h B
Druck-Gegendruckrichtung des KolbensPressure counterpressure direction of the piston
D, GDD, GD

Claims (9)

  1. Multiple cooled pistons (20) for a combustion motor with a steel forged upper piston part (1) which encompasses a combustion bowl (3) in the piston crown and an annular wall (4) with ring belt (11) and with a lower piston part (2) which encompasses a piston skirt (9), hub (12) for the housing of the gudgeon pins connecting the pistons (20) with the connecting rods as well as the hub supports (6) connected with the piston skirt (9), whereby a cooling channel (7) is formed by the upper piston part (1) and the lower piston part (2) and whose cross-section is delimited by these, whereby the upper piston part (1) has a circumferential annular rib (5) delimited by the inner wall of the cooling channel and the lower piston part (2) has an annular-shaped circumferential supporting rib (10) connected to the hub supports (6) and whereby the upper piston part (1) and the lower piston part (2) are joined integrally by the annular ribs (5) and the supporting ribs (10),
    characterised by the fact that
    - the cooling channel (7) formed in the piston upper part (1) has holes (14) distributed throughout it to the piston crown, whereby the existing piston material forms supporting ribs (8) between the holes (14) which form sections of the circumferential annular rib (5) radially to the piston longitudinal axis (K) and
    - that the annular wall (4) delimiting the cooling channel (7) forms a gap (13) with the piston lower part (2) along its wall cross-section.
  2. Pistons (20) in accordance with claim 1, characterised by the fact that the holes (14) being distributed radially symmetrical and/or asymmetrical along the course of the cooling channel (7).
  3. Pistons (20) in accordance with claims 1 and 2, characterised by the fact that the holes (14) have a depth (hB) which amounts at most to half of the total height (H) of the cooling channel (7).
  4. Pistons (20) in accordance with claims 1 through 3, characterised by the fact that at least a portion of the axes of the holes (14) run parallel to the piston longitudinal axis (K).
  5. Pistons (20) in accordance with claim 4, characterised by the fact that the axes of the holes (14) run at an acute angle to the piston longitudinal axis (K).
  6. Pistons (20) in accordance with claim 5, characterised by the fact that the holes (14) have a cylindrical or oblong shape.
  7. Pistons (20) in accordance with claim 1, characterised by the fact that a sealing element (15) is located in the gap (13).
  8. Pistons (20) in accordance with claim 1, characterised by the fact that the integral connection of the piston upper part and the piston lower part (1, 2) is a welded or soldered joint.
  9. Pistons (20) in accordance with claim 1, characterised by the fact that the piston upper part (1) is made from an oxidation resistant and/or temperature resistant material and the piston lower part (2) is made from precipitation hardening ferritic-perlitic steel or tempered steel.
EP03769200A 2002-09-25 2003-09-19 Multi-part cooled piston for an internal combustion engine Expired - Fee Related EP1546535B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10244512 2002-09-25
DE10244512A DE10244512A1 (en) 2002-09-25 2002-09-25 Multi-part cooled piston for an internal combustion engine
PCT/DE2003/003114 WO2004029442A1 (en) 2002-09-25 2003-09-19 Multi-part cooled piston for an internal combustion engine

Publications (2)

Publication Number Publication Date
EP1546535A1 EP1546535A1 (en) 2005-06-29
EP1546535B1 true EP1546535B1 (en) 2011-08-31

Family

ID=31502554

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03769200A Expired - Fee Related EP1546535B1 (en) 2002-09-25 2003-09-19 Multi-part cooled piston for an internal combustion engine

Country Status (9)

Country Link
US (1) US6698391B1 (en)
EP (1) EP1546535B1 (en)
JP (1) JP2006500505A (en)
KR (1) KR20050057574A (en)
CN (1) CN100353046C (en)
BR (1) BR0314963B1 (en)
DE (1) DE10244512A1 (en)
HK (1) HK1078917A1 (en)
WO (1) WO2004029442A1 (en)

Families Citing this family (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2365507B (en) 2000-08-02 2004-09-15 Federal Mogul Technology Ltd Engine piston and manufacture
DE10301367A1 (en) * 2003-01-16 2004-07-29 Mahle Gmbh Method for making shaker bores in the cooling channel of a one-piece piston
KR20050039320A (en) * 2003-10-24 2005-04-29 현대자동차주식회사 Piston for internal combustion engine
WO2005121608A1 (en) * 2004-06-08 2005-12-22 Savice Limited A piston, a ring and a piston assembly for a two cycle engine
US7406941B2 (en) 2004-07-21 2008-08-05 Federal - Mogul World Wide, Inc. One piece cast steel monobloc piston
DE102004061778A1 (en) * 2004-09-29 2006-04-06 Ks Kolbenschmidt Gmbh Simple friction weld
US20080271597A1 (en) * 2006-03-31 2008-11-06 Soul David F Methods and apparatus for operating an internal combustion engine
DE102007027162A1 (en) 2007-06-13 2008-12-18 Mahle International Gmbh Two-piece piston for an internal combustion engine
DE102007044106A1 (en) * 2007-09-15 2009-03-19 Mahle International Gmbh Two-piece piston for an internal combustion engine
DE102007050213A1 (en) * 2007-10-20 2009-04-23 Mahle International Gmbh Piston for an internal combustion engine
US7918155B2 (en) * 2007-12-12 2011-04-05 Mahle International Gmbh Piston with a cooling gallery
DE102007061601A1 (en) * 2007-12-20 2009-06-25 Mahle International Gmbh Piston for an internal combustion engine and method for its production
DE102008011922A1 (en) 2008-02-29 2009-09-03 Ks Kolbenschmidt Gmbh Piston for internal combustion engines, produced by means of a multi-orbital friction welding process
DE102008034430B4 (en) * 2008-07-24 2015-02-19 Ks Kolbenschmidt Gmbh Friction welded steel piston with optimized cooling channel
DE102008045456A1 (en) * 2008-09-02 2010-03-04 Mahle International Gmbh Piston for an internal combustion engine
JP5008627B2 (en) * 2008-09-17 2012-08-22 本田技研工業株式会社 Piston and manufacturing method thereof
CN101644327B (en) * 2009-06-10 2013-01-16 北京中清能发动机技术有限公司 Piston and internal combustion engine of circular slider-crank mechanism
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
US20110030214A1 (en) * 2009-08-05 2011-02-10 Wolfgang Rein Piston assembly multiple step forming process
DE102010015568A1 (en) 2010-04-19 2011-10-20 Ks Kolbenschmidt Gmbh Piston upper part of a built or welded piston with extended cooling chambers
DE102011113800A1 (en) * 2011-09-20 2013-03-21 Mahle International Gmbh Piston for an internal combustion engine and method for its production
WO2013045289A1 (en) 2011-09-28 2013-04-04 Ks Kolbenschmidt Gmbh Two-part steel piston for internal combustion engines
MX2015003487A (en) * 2012-09-27 2015-09-25 Ks Kolbenschmidt Gmbh Piston of two-piece construction for an internal combustion engine.
CN105143732A (en) * 2013-01-29 2015-12-09 马勒国际有限公司 Steel piston with fourth land guidance and improved friction characteristics
JP6401188B2 (en) 2013-02-18 2018-10-03 フェデラル−モーグル・リミテッド・ライアビリティ・カンパニーＦｅｄｅｒａｌ−Ｍｏｇｕｌ Ｌｌｃ Complex shaped piston oil gallery with piston crown made by cast metal or powder metal process
US9334958B2 (en) * 2013-02-18 2016-05-10 Federal-Mogul Corporation Complex-shaped forged piston oil galleries
US10787991B2 (en) 2013-02-18 2020-09-29 Tenneco Inc. Complex-shaped forged piston oil galleries
WO2016001379A1 (en) * 2014-07-02 2016-01-07 Ks Kolbenschmidt Gmbh Gap geometry in a cohesively joined cooling-channel piston
US10184422B2 (en) * 2014-12-30 2019-01-22 Tenneco Inc. Reduced compression height dual gallery piston, piston assembly therewith and methods of construction thereof
KR20170107473A (en) * 2015-01-30 2017-09-25 페더럴-모걸 엘엘씨 Piston with sealed cooling passage and method of making the piston
DE102015006642A1 (en) * 2015-05-22 2016-11-24 Caterpillar Motoren Gmbh & Co. Kg PISTON-SUPPORTING ASSEMBLY
MX2018013353A (en) 2016-05-04 2019-02-20 Ks Kolbenschmidt Gmbh Piston.
JP7137786B2 (en) * 2018-09-25 2022-09-15 スズキ株式会社 internal combustion engine piston
CN109268495B (en) * 2018-11-19 2020-07-10 滨州渤海活塞有限公司 Combination of steel piston and piston pin and processing technology thereof

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1430928A (en) * 1921-12-31 1922-10-03 Louis R Spencer Engine piston
US1980658A (en) * 1931-12-30 1934-11-13 Renette Company Piston
US3240193A (en) * 1964-07-30 1966-03-15 Gen Motors Corp Piston and piston cooling means
DE2832970A1 (en) * 1978-07-27 1980-02-07 Schmidt Gmbh Karl BUILT LIQUID-COOLED PISTON FOR INTERNAL COMBUSTION ENGINES
JPS6329104B2 (en) * 1979-04-23 1988-06-10 Kyatapiraa Inc
DE2919638A1 (en) * 1979-05-16 1980-11-20 Schmidt Gmbh Karl PISTON FOR INTERNAL COMBUSTION ENGINES
DE3403624A1 (en) * 1984-02-02 1985-08-08 Kolbenschmidt AG, 7107 Neckarsulm BUILT LIQUID-COOLED PISTON FOR INTERNAL COMBUSTION ENGINES
JPS61175255A (en) 1985-01-30 1986-08-06 Mitsubishi Heavy Ind Ltd Heat insulating piston for internal-combustion engine
DE3518721C3 (en) * 1985-05-24 1997-09-04 Man B & W Diesel Ag Oil-cooled, multi-part plunger of an internal combustion engine
DE3830033C2 (en) * 1987-11-30 1998-05-07 Mahle Gmbh Built, oil-cooled plunger for internal combustion engines
DE4014703A1 (en) * 1990-05-08 1991-11-14 Mahle Gmbh COOLED SUBMERSIBLE PISTON FOR INTERNAL COMBUSTION ENGINES WITH SEPARATE PISTON TOP AND PISTON
DE4118400A1 (en) * 1990-06-29 1992-01-02 Kolbenschmidt Ag BUILT OIL-COOLED PISTON FOR DIESEL ENGINES
BR9005370A (en) * 1990-10-18 1992-06-16 Metal Leve Sa COOLED PUMP MANUFACTURING PROCESS
JPH04321759A (en) * 1991-04-23 1992-11-11 Yanmar Diesel Engine Co Ltd Piston for internal combustion engine
DE4120850A1 (en) * 1991-06-25 1993-01-07 Kolbenschmidt Ag BUILT OIL-COOLED PISTON FOR DIESEL ENGINES
US5483869A (en) * 1995-05-26 1996-01-16 Caterpillar Inc. Sealed articulated piston
US6032619A (en) * 1998-07-16 2000-03-07 Federal-Mogul World Wide, Inc. Piston having a tube to deliver oil for cooling a crown
US6155157A (en) * 1998-10-06 2000-12-05 Caterpillar Inc. Method and apparatus for making a two piece unitary piston
US6182630B1 (en) * 1998-11-23 2001-02-06 Federal-Mogul World Wide, Inc. Bolted articulated piston
US6164261A (en) * 1999-02-10 2000-12-26 Caterpillar Inc. Internal combustion engine piston assembly and method
DE19926568A1 (en) 1999-06-11 2000-12-14 Mahle Gmbh Cooled pistons for internal combustion engines
US6244161B1 (en) * 1999-10-07 2001-06-12 Cummins Engine Company, Inc. High temperature-resistant material for articulated pistons

Also Published As

Publication number Publication date
HK1078917A1 (en) 2006-03-24
CN1685143A (en) 2005-10-19
EP1546535A1 (en) 2005-06-29
US6698391B1 (en) 2004-03-02
BR0314963A (en) 2005-08-02
KR20050057574A (en) 2005-06-16
WO2004029442A1 (en) 2004-04-08
DE10244512A1 (en) 2004-04-15
BR0314963B1 (en) 2012-08-21
CN100353046C (en) 2007-12-05
JP2006500505A (en) 2006-01-05

Similar Documents

Publication Publication Date Title
EP1546535B1 (en) Multi-part cooled piston for an internal combustion engine
EP1546534B1 (en) Multi-part cooled piston for an internal combustion engine
EP1561023B1 (en) Multi-part cooled piston for an internal combustion engine and method for producing the same
DE60028800T3 (en) PISTON WITH TWO COOLANT CHANNELS
EP1483493B1 (en) Multi-part, cooled piston for an internal combustion engine
EP1546536B1 (en) Single-part cooling channel piston for an internal combustion engine
EP1680256B1 (en) Method for producing a piston for an internal combustion engine
EP0779954B1 (en) Light-metal piston for highly stressed internal combustion engines
EP1819920B1 (en) Piston for a combustion engine
EP1913250B1 (en) Piston for an internal combustion engine and covering ring for the cooling duct of a piston of said type
EP0804680A1 (en) Forged or cast piston head for a multiple component piston
EP0714485B1 (en) Light metal piston for highly stressed internal combustion engines
WO2002050414A1 (en) Cooling duct piston for a direct-injection diesel engine
EP2342441A1 (en) Internal combustion engine piston with cooling channel said piston comprising a sealing element sealing the cooling channel
DE10340292A1 (en) Piston for an internal combustion engine
DE10209168B4 (en) Steel piston with cooling channel
DE102013218709A1 (en) Two-piece constructed piston of an internal combustion engine
DE4328904C2 (en) Internal combustion engine with a partially cooled valve seat ring
DE19603589A1 (en) Pendulum shaft piston
WO2013004218A1 (en) Piston for an internal combustion engine
EP0705968A1 (en) Piston for internal combustion engine
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
EP2893177B1 (en) Piston for an internal combustion engine
WO2016173690A1 (en) Piston for a reciprocating piston internal combustion engine
EP0373689B1 (en) Oil-cooled piston for internal-combustion engines

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: 20050422

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR

RBV Designated contracting states (corrected)

Designated state(s): DE FR GB IT

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

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 50313940

Country of ref document: DE

Effective date: 20111027

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

26 Opposition filed

Opponent name: KS KOLBENSCHMIDT GMBH

Effective date: 20120531

PLAX Notice of opposition and request to file observation + time limit sent

Free format text: ORIGINAL CODE: EPIDOSNOBS2

REG Reference to a national code

Ref country code: DE

Ref legal event code: R026

Ref document number: 50313940

Country of ref document: DE

Effective date: 20120531

PLBB Reply of patent proprietor to notice(s) of opposition received

Free format text: ORIGINAL CODE: EPIDOSNOBS3

PLCK Communication despatched that opposition was rejected

Free format text: ORIGINAL CODE: EPIDOSNREJ1

APBM Appeal reference recorded

Free format text: ORIGINAL CODE: EPIDOSNREFNO

APBP Date of receipt of notice of appeal recorded

Free format text: ORIGINAL CODE: EPIDOSNNOA2O

APAH Appeal reference modified

Free format text: ORIGINAL CODE: EPIDOSCREFNO

APBQ Date of receipt of statement of grounds of appeal recorded

Free format text: ORIGINAL CODE: EPIDOSNNOA3O

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 14

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 15

APBU Appeal procedure closed

Free format text: ORIGINAL CODE: EPIDOSNNOA9O

REG Reference to a national code

Ref country code: DE

Ref legal event code: R100

Ref document number: 50313940

Country of ref document: DE

PLBN Opposition rejected

Free format text: ORIGINAL CODE: 0009273

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: OPPOSITION REJECTED

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20170922

Year of fee payment: 15

Ref country code: GB

Payment date: 20170929

Year of fee payment: 15

27O Opposition rejected

Effective date: 20171017

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20171002

Year of fee payment: 15

Ref country code: DE

Payment date: 20171130

Year of fee payment: 15

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 50313940

Country of ref document: DE

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20180919

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: 20190402

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180919

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: 20180930

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: 20180919