WO2014079407A1 - Piston for an internal combustion engine, and arrangement comprising a piston and a piston pin - Google Patents
Piston for an internal combustion engine, and arrangement comprising a piston and a piston pin Download PDFInfo
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- WO2014079407A1 WO2014079407A1 PCT/DE2013/000689 DE2013000689W WO2014079407A1 WO 2014079407 A1 WO2014079407 A1 WO 2014079407A1 DE 2013000689 W DE2013000689 W DE 2013000689W WO 2014079407 A1 WO2014079407 A1 WO 2014079407A1
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- Prior art keywords
- piston
- feed
- directed
- hub
- feed channel
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Classifications
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- 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
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- 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
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- 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
Definitions
- the present invention relates to a piston for an internal combustion engine, comprising a piston head and a piston skirt, wherein the piston head has a circumferential cooling channel, wherein the piston skirt opposite to the piston circumference in the direction of the piston central axis inwardly offset piston hubs provided with hub bores and connected to each other via shaft contact surfaces are.
- the present invention further relates to an arrangement of a piston and a piston pin with an internal bore.
- the object of the present invention is to further develop a generic piston and a generic arrangement such that the temperatures occurring in engine operation in the region of the hub bores, the Kolbenbol-
- the solution consists in that a supply element for coolant is provided on at least one piston hub, which has at least one feed channel, and that a first end of the feed channel is directed to the hub bore.
- the first end of the feed channel is directed to the inner bore of the piston pin.
- the piston according to the invention or the arrangement according to the invention are characterized in that additional cooling oil is supplied to the inner bore of the piston pin by means of the feed element provided according to the invention.
- the cooling oil can be removed from the cooling channel and / or supplied by a conventional injection nozzle of the engine.
- the inventive measure the cooling of the piston pin is intensified during engine operation, so that temperatures above 200 ° C in the hub bores, the piston pin and the small connecting rod eye can be avoided.
- a first preferred embodiment provides that a second end of the at least one feed channel of the feed element is directed to a coolant outlet opening provided in the cooling channel. In this way can be easily collected from the cooling passage coolant exiting and directed to the inner bore of the piston pin.
- a further preferred embodiment is that a second end of the at least one feed channel of the feed element is directed to the free end of the piston skirt.
- a jet or part of the jet emerging from the injection nozzle coolant is collected by the feed and directed to the inner bore of the piston pin.
- the feed element has a further feed channel, the first end of which is directed towards the inner bore of the piston pin and the second end of which is directed to a coolant outlet opening provided in the cooling channel.
- both coolant exiting from the cooling channel and from the injection nozzle can be collected in order to further improve the cooling of the piston pin.
- the feed element is suitably welded to the piston hub, glued, positively fixed or cast in one piece or forged and can be arranged offset in Kolbenbolzenachscardi or laterally thereto.
- Figure 1 shows a first embodiment of a piston according to the invention in
- FIG. 2 shows the piston according to FIG. 1 in a representation rotated by 90 ° in FIG.
- FIG. 3 shows another embodiment of a piston according to the invention in
- FIG. 4 shows the piston according to FIG. 3 in a representation rotated by 90 ° in FIG.
- Figure 5 shows another embodiment of a piston according to the invention in
- FIG. 6 shows the piston according to FIG. 5 in a representation rotated by 90 ° in FIG.
- Figure 7 is an enlarged view of an embodiment of a feed element in section.
- Figures 1 and 2 show a first embodiment of a piston 10 according to the invention.
- the piston 10 may be a one-piece or multi-piece piston.
- the piston 10 may be made of an iron-based material and / or a light metal material.
- Figures 1 and 2 show an example of a two-piece piston 10 in the form of a box piston.
- the piston 10 has a piston head 11 with a combustion bowl 13 having a piston head 12, a peripheral land 14 and a peripheral ring portion 15 for receiving piston rings (not shown).
- a circumferential cooling channel 16 is provided, which has at least one cooling oil outlet 17.
- the piston 10 further has a piston shaft 21 with in the direction of the piston center axis M inwardly offset piston bosses 22 and hub bores 23 for receiving a dash-dotted piston pin 24 having an inner bore 24a.
- the piston hubs 22 are connected in a conventional manner via hub connections with the underside of the piston head.
- the piston hubs 22 are connected to each other via shaft running surfaces 25, 26.
- the piston 10 consists of a piston upper part 31 and a piston lower part 32, which are connected to one another in a known manner by means of a friction welding process.
- a feed element 27 is provided on a piston hub 22 of the piston 10, which, for example, can be glued, welded, positively fixed or cast integrally with the piston hub 22 or forged.
- the feed element 27 has a feed channel 28 whose first end 29a is directed toward the hub bore 23 and whose second end 29b is directed toward a coolant outlet opening 17 of the cooling channel 16.
- the first end 29 a of the feed channel 28 is directed to the inner bore 24 a of the piston pin 24.
- This construction allows exiting from the coolant outlet port 17 To guide coolant in the direction of the inner bore 24 a of the piston pin 24 and to intensify the cooling of the piston pin 24.
- FIGS. 3 and 4 show a further exemplary embodiment of a piston 110 according to the invention.
- the piston 110 essentially corresponds to the piston 10 according to FIGS. 1 and 2, so that matching structural elements are provided with the same reference numerals and in this regard to the description of FIGS. 1 and 2 is referenced.
- a feed element 127 is provided in this embodiment on a piston hub 22 of the piston 110, which may for example be glued, welded, positively fixed or cast integrally with the piston hub 22 or forged.
- the feed element 127 has a feed channel 128, whose first end 129a is directed towards the hub bore 23 and whose second end 129b is directed towards the free end of the piston skirt 21.
- the first end 129 a of the feed channel 128 is directed to the inner bore 24 a of the piston pin 24.
- the second end 129b is directed in this case to a conventional injection nozzle 133.
- This construction makes it possible to trap coolant emerging from the injection nozzle 133 in the feed channel 128 of the feed element 127 and to guide it in the direction of the inner bore 24a of the piston pin 24 and to intensify the cooling of the piston pin 24.
- the injection nozzle 133 may be provided separately, so that the entire coolant jet emerging from it is directed into the feed element 127.
- the injection nozzle 133 may also be provided in principle for piston cooling, so that only a certain proportion of the coolant jet emerging from it is collected by the feed element 127.
- FIGS. 5 and 6 show a further exemplary embodiment of a piston 210 according to the invention.
- the piston 210 substantially corresponds to the piston 10 according to FIGS. 1 and 2, so that matching structural elements are provided with the same reference numerals and in this respect to the description of FIGS. 1 and 2 is referenced.
- a feed element 227 is provided in this embodiment on a piston hub 22 of the piston 210, which may for example be glued, welded, positively fixed or cast integrally with the piston hub 22 or forged.
- the feed element 227 has a first feed channel 228a, whose first end 229a is directed towards the hub bore 23 and whose second end 229b is directed toward the free end of the piston skirt 21.
- the first end 229 a of the first supply channel 228 a to the inner bore 24 a of the piston pin 24 is directed.
- the second end 229b is directed in this case to a known Anspritzdüse 233.
- This construction makes it possible to trap coolant emerging from the injection nozzle 233 in the feed channel 228a of the feed element 227 and to guide it in the direction of the inner bore 24a of the piston pin 24 and to intensify the cooling of the piston pin 24.
- the injection nozzle 233 can be provided separately, so that the entire coolant jet emerging from it is directed into the feed element 227. However, the injection nozzle 233 can also be provided in principle for piston cooling, so that only a certain proportion of the coolant jet emerging from it is collected by the feed element 227.
- a second feed channel 228b is further provided in the feed element 227, whose first end 234a is directed toward the hub bore 23 and whose second end 234b is directed toward a coolant outlet opening 17 of the cooling channel 16.
- the first end 234 a of the second feed channel 228 b is directed to the inner bore 24 a of the piston pin 24.
- FIG. 7 shows an enlarged view of an embodiment of a feed element 27, 127, 227.
- This feed element has within its feed channel 28, 128, 228a, 228b in the embodiment conically shaped straightening element 335.
- the straightening element 335 serves for the bundle-shaped alignment and effective forwarding of the coolant jet collected by the feed element 27, 127, 227.
- the feed channel 28, 128, 228a, 228b is configured conically in cross-section in order to make the collection of the coolant jet particularly ef- to make it more effective.
- the feed element can also be designed as a metallic or non-metallic bent pipe or flexible hose.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
Description
Kolben für einen Verbrennungsmotor sowie Piston for an internal combustion engine as well
Anordnung aus einem Kolben und einem Kolbenbolzen Arrangement of a piston and a piston pin
Die vorliegende Erfindung betrifft einen Kolben für einen Verbrennungsmotor, mit einem Kolbenkopf und einem Kolbenschaft, wobei der Kolbenkopf einen umlaufenden Kühlkanal aufweist, wobei der Kolbenschaft gegenüber dem Kolbenumfang in Richtung der Kolbenmittelachse nach innen versetzte Kolbennaben aufweist, die mit Nabenbohrungen versehen und über Schaftlaufflächen miteinander verbunden sind. Die vorliegende Erfindung betrifft ferner eine Anordnung aus einem Kolben und einem Kolbenbolzen mit einer Innenbohrung. The present invention relates to a piston for an internal combustion engine, comprising a piston head and a piston skirt, wherein the piston head has a circumferential cooling channel, wherein the piston skirt opposite to the piston circumference in the direction of the piston central axis inwardly offset piston hubs provided with hub bores and connected to each other via shaft contact surfaces are. The present invention further relates to an arrangement of a piston and a piston pin with an internal bore.
Gattungsgemäße Kolben sind an sich bekannt und werden als„Kastenkolben" bezeichnet. In modernen Verbrennungsmotoren, insbesondere PKW- und NFZ- Dieselmotoren, können vor allem bei Kolben mit vergleichsweise geringer Kompressionshöhe im Motorbetrieb sehr hohe Temperaturen im Bereich der Nabenbohrungen auftreten. Dadurch wird der Kolbenbolzen übermäßig erwärmt und überträgt die Wärme auf das kleine Pleuelauge des Pleuels. Im Extremfall können Temperaturen über 250°C auftreten. Dadurch werden die Lagerflächen der Nabenbohrungen ebenso beeinträchtigt wie die Lagerflächen im kleinen Pleuelauge, da diese in der Regel für derart hohe Temperaturen nicht ausgelegt sind. Ferner werden die Kolbenbolzen häufig mit an sich bekannten DLC-Beschichtungen (diamond-like carbon) zur Verbesserung der Lagerung in den Nabenbohrungen und dem kleinen Pleüelauge versehen. DLC-Beschichtungen sind allerdings nur bis Temperaturen von etwa 200°C wärmebeständig. Die im Bereich des Kolbenbolzens auftretenden hohen Temperaturen von über 250°C führen daher im Motorbetrieb zur Zersetzung der DLC- Beschichtung des Kolbenbolzens. Generic pistons are known per se and are referred to as "box pistons." In modern internal combustion engines, especially passenger car and commercial vehicle diesel engines, very high temperatures can occur in the region of the hub bores, especially in pistons with comparatively low compression height Excessively heated and transmits the heat to the small connecting rod eye of the connecting rod.In extreme cases, temperatures above 250 ° C occur.This affects the bearing surfaces of the hub holes as well as the bearing surfaces in the small connecting rod eye, as these are not designed for such high temperatures usually Furthermore, the piston pins are often provided with known DLC coatings (diamond-like carbon) to improve the storage in the hub holes and the small Pleüelauge.DLC coatings, however, are heat-resistant only to temperatures of about 200 ° C. Die of the piston pin High temperatures of over 250 ° C, which occur in censors, therefore lead to the decomposition of the DLC coating of the piston pin during engine operation.
Die Aufgabe der vorliegenden Erfindung besteht darin, einen gattungsgemäßen Kolben und eine gattungsgemäße Anordnung so weiterzuentwickeln, dass die im Motorbetrieb auftretenden Temperaturen im Bereich der Nabenbohrungen, des Kolbenbol- The object of the present invention is to further develop a generic piston and a generic arrangement such that the temperatures occurring in engine operation in the region of the hub bores, the Kolbenbol-
|Bestätigungskopie| zens und des kleinen Pleuelauges die Lagerflächen bzw. eine DLC-Beschichtung des Kolbenbolzens nicht beeinträchtigen. | Confirmation copy | zens and the small connecting rod eye the bearing surfaces or a DLC coating of the piston pin does not affect.
Die Lösung besteht darin, dass an zumindest einer Kolbennabe ein Zuführelement für Kühlmittel vorgesehen ist, welches mindestens einen Zuführkanal aufweist, und dass ein erstes Ende des Zuführkanals zur Nabenbohrung gerichtet ist. Bei der erfindungsgemäßen Anordnung ist das erste Ende des Zuführkanals zur Innenbohrung des Kolbenbolzens gerichtet. The solution consists in that a supply element for coolant is provided on at least one piston hub, which has at least one feed channel, and that a first end of the feed channel is directed to the hub bore. In the arrangement according to the invention, the first end of the feed channel is directed to the inner bore of the piston pin.
Der erfindungsgemäße Kolben bzw. die erfindungsgemäße Anordnung zeichnen sich dadurch aus, dass der Innenbohrung des Kolbenbolzens mittels des erfindungsgemäß vorgesehenen Zuführelements zusätzliches Kühlöl zugeführt wird. Das Kühlöl kann dem Kühlkanal entnommen und/oder von einer an sich bekannten Anspritzdüse des Motors zugeführt werden. Durch die erfindungsgemäße Maßnahme wird die Kühlung des Kolbenbolzens im Motorbetrieb intensiviert, so dass Temperaturen über 200°C im Bereich der Nabenbohrungen, des Kolbenbolzens und des kleinen Pleuelauges vermieden werden. The piston according to the invention or the arrangement according to the invention are characterized in that additional cooling oil is supplied to the inner bore of the piston pin by means of the feed element provided according to the invention. The cooling oil can be removed from the cooling channel and / or supplied by a conventional injection nozzle of the engine. The inventive measure the cooling of the piston pin is intensified during engine operation, so that temperatures above 200 ° C in the hub bores, the piston pin and the small connecting rod eye can be avoided.
Vorteilhafte Weiterbildungen ergeben sich aus den Unteransprüchen. Advantageous developments emerge from the subclaims.
Eine erste bevorzugte Ausführungsform sieht vor, dass ein zweites Ende des mindestens einen Zuführkanals des Zuführelements zu einer im Kühlkanal vorgesehenen Kühlmittelauslassöffnung gerichtet ist. Auf diese Weise kann problemlos aus dem Kühlkanal austretendes Kühlmittel aufgefangen und zur Innenbohrung des Kolbenbolzens geleitet werden. A first preferred embodiment provides that a second end of the at least one feed channel of the feed element is directed to a coolant outlet opening provided in the cooling channel. In this way can be easily collected from the cooling passage coolant exiting and directed to the inner bore of the piston pin.
Eine weitere bevorzugte Ausführungsform besteht darin, dass ein zweites Ende des mindestens einen Zuführkanals des Zuführelements zum freien Ende des Kolbenschafts gerichtet ist. Bei dieser Ausführungsform wird ein Strahl oder Teilstrahl des aus der Anspritzdüse austretenden Kühlmittels vom Zuführelement aufgefangen und zur Innenbohrung des Kolbenbolzens geleitet. Eine bevorzugte Weiterentwicklung dieser Ausführungsform besteht darin, dass das Zuführelement einen weiteren Zuführkanal aufweist, dessen erstes Ende zur Innenbohrung des Kolbenbolzens gerichtet und dessen zweites Ende zu einer im Kühlkanal vorgesehenen Kühlmittelauslassöffnung gerichtet ist. Bei dieser Ausführungsform kann sowohl aus dem Kühlkanal als auch aus der Anspritzdüse austretendes Kühlmittel aufgefangen werden, um die Kühlung des Kolbenbolzens weiter zu verbessern. A further preferred embodiment is that a second end of the at least one feed channel of the feed element is directed to the free end of the piston skirt. In this embodiment, a jet or part of the jet emerging from the injection nozzle coolant is collected by the feed and directed to the inner bore of the piston pin. A preferred further development of this embodiment consists in that the feed element has a further feed channel, the first end of which is directed towards the inner bore of the piston pin and the second end of which is directed to a coolant outlet opening provided in the cooling channel. In this embodiment, both coolant exiting from the cooling channel and from the injection nozzle can be collected in order to further improve the cooling of the piston pin.
Das Zuführelement ist zweckmäßigerweise an die Kolbennabe geschweißt, geklebt, formschlüssig fixiert oder einstückig gegossen oder geschmiedet und kann in Kolbenbolzenachsrichtung oder seitlich dazu versetzt angeordnet sein. The feed element is suitably welded to the piston hub, glued, positively fixed or cast in one piece or forged and can be arranged offset in Kolbenbolzenachsrichtung or laterally thereto.
Ausführungsbeispiele der vorliegenden Erfindung werden im Folgenden anhand der beigefügten Zeichnungen näher erläutert. Es zeigen in einer schematischen, nicht maßstabsgetreuen Darstellung: Embodiments of the present invention are explained in more detail below with reference to the accompanying drawings. In a schematic, not to scale representation:
Figur 1 ein erstes Ausführungsbeispiel eines erfindungsgemäßen Kolbens im Figure 1 shows a first embodiment of a piston according to the invention in
Schnitt; Cut;
Figur 2 der Kolben gemäß Figur 1 in einer um 90° gedrehten Darstellung im FIG. 2 shows the piston according to FIG. 1 in a representation rotated by 90 ° in FIG
Schnitt; Cut;
Figur 3 ein weiteres Ausführungsbeispiel eines erfindungsgemäßen Kolbens im Figure 3 shows another embodiment of a piston according to the invention in
Schnitt; Cut;
Figur 4 der Kolben gemäß Figur 3 in einer um 90° gedrehten Darstellung im FIG. 4 shows the piston according to FIG. 3 in a representation rotated by 90 ° in FIG
Schnitt; Cut;
Figur 5 ein weiteres Ausführungsbeispiel eines erfindungsgemäßen Kolbens im Figure 5 shows another embodiment of a piston according to the invention in
Schnitt; Cut;
Figur 6 der Kolben gemäß Figur 5 in einer um 90° gedrehten Darstellung im FIG. 6 shows the piston according to FIG. 5 in a representation rotated by 90 ° in FIG
Schnitt; Figur 7 eine vergrößerte Darstellung eines Ausführungsbeispiels eines Zuführelements im Schnitt. Cut; Figure 7 is an enlarged view of an embodiment of a feed element in section.
Die Figuren 1 und 2 zeigen ein erstes Ausführungsbeispiel eines erfindungsgemäßen Kolbens 10. Der Kolben 10 kann ein einteiliger oder mehrteiliger Kolben sein. Der Kolben 10 kann aus einem eisenbasierten Werkstoff und/oder einem Leichtmetallwerkstoff hergestellt sein. Figures 1 and 2 show a first embodiment of a piston 10 according to the invention. The piston 10 may be a one-piece or multi-piece piston. The piston 10 may be made of an iron-based material and / or a light metal material.
Die Figuren 1 und 2 zeigen beispielhaft einen zweiteiligen Kolben 10 in Form eines Kastenkolbens. Der Kolben 10 weist einen Kolbenkopf 11 mit einem eine Verbrennungsmulde 13 aufweisenden Kolbenboden 12, einem umlaufenden Feuersteg 14 und einer umlaufenden Ringpartie 15 zur Aufnahme von Kolbenringen (nicht dargestellt) auf. In Höhe der Ringpartie 15 ist ein umlaufender Kühlkanal 16 vorgesehen, der mindestens eine Kühlölauslassöffnung 17 aufweist. Der Kolben 10 weist ferner einen Kolbenschaft 21 mit in Richtung der Kolbenmittelachse M nach innen versetzte Kolbennaben 22 und Nabenbohrungen 23 zur Aufnahme eines strichpunktiert dargestellten Kolbenbolzens 24 mit einer Innenbohrung 24a auf. Die Kolbennaben 22 sind in an sich bekannter Weise über Nabenanbindungen mit der Unterseite des Kolbenkopfes verbunden. Die Kolbennaben 22 sind über Schaftlaufflächen 25, 26 miteinander verbunden. Figures 1 and 2 show an example of a two-piece piston 10 in the form of a box piston. The piston 10 has a piston head 11 with a combustion bowl 13 having a piston head 12, a peripheral land 14 and a peripheral ring portion 15 for receiving piston rings (not shown). In the amount of the ring portion 15, a circumferential cooling channel 16 is provided, which has at least one cooling oil outlet 17. The piston 10 further has a piston shaft 21 with in the direction of the piston center axis M inwardly offset piston bosses 22 and hub bores 23 for receiving a dash-dotted piston pin 24 having an inner bore 24a. The piston hubs 22 are connected in a conventional manner via hub connections with the underside of the piston head. The piston hubs 22 are connected to each other via shaft running surfaces 25, 26.
Im Ausführungsbeispiel besteht der erfindungsgemäße Kolben 10 aus einem Kolbenoberteil 31 und einem Kolbenunterteil 32, die in an sich bekannter Weise mittels eines Reibschweißverfahrens miteinander verbunden sind. In the exemplary embodiment, the piston 10 according to the invention consists of a piston upper part 31 and a piston lower part 32, which are connected to one another in a known manner by means of a friction welding process.
Erfindungsgemäß ist an einer Kolbennabe 22 des Kolbens 10 ein Zuführelement 27 vorgesehen, das beispielsweise geklebt, geschweißt, formschlüssig fixiert oder einstückig mit der Kolbennabe 22 gegossen oder geschmiedet sein kann. Das Zuführelement 27 weist einen Zuführkanal 28 auf, dessen erstes Ende 29a zur Nabenbohrung 23 gerichtet und dessen zweites Ende 29b zu einer Kühlmittelauslassöff- nung 17 des Kühlkanals 16 gerichtet ist. Im montierten Zustand ist das erste Ende 29a des Zuführkanals 28 zur Innenbohrung 24a des Kolbenbolzens 24 gerichtet. Diese Konstruktion erlaubt es, aus der Kühlmittelauslassöffnung 17 austretendes Kühlmittel in Richtung der Innenbohrung 24a des Kolbenbolzens 24 zu leiten und die Kühlung des Kolbenbolzens 24 zu intensivieren. According to the invention, a feed element 27 is provided on a piston hub 22 of the piston 10, which, for example, can be glued, welded, positively fixed or cast integrally with the piston hub 22 or forged. The feed element 27 has a feed channel 28 whose first end 29a is directed toward the hub bore 23 and whose second end 29b is directed toward a coolant outlet opening 17 of the cooling channel 16. In the assembled state, the first end 29 a of the feed channel 28 is directed to the inner bore 24 a of the piston pin 24. This construction allows exiting from the coolant outlet port 17 To guide coolant in the direction of the inner bore 24 a of the piston pin 24 and to intensify the cooling of the piston pin 24.
Die Figuren 3 und 4 zeigen ein weiteres Ausführungsbeispiel eines erfindungsgemäßen Kolbens 110. Der Kolben 110 entspricht im Wesentlichen dem Kolben 10 gemäß den Figuren 1 und 2, so dass übereinstimmende Strukturelemente mit denselben Bezugszeichen versehen sind und diesbezüglich auf die Beschreibung zu den Figuren 1 und 2 verwiesen wird. FIGS. 3 and 4 show a further exemplary embodiment of a piston 110 according to the invention. The piston 110 essentially corresponds to the piston 10 according to FIGS. 1 and 2, so that matching structural elements are provided with the same reference numerals and in this regard to the description of FIGS. 1 and 2 is referenced.
Erfindungsgemäß ist bei diesem Ausführungsbeispiel an einer Kolbennabe 22 des Kolbens 110 ein Zuführelement 127 vorgesehen, das beispielsweise geklebt, geschweißt, formschlüssig fixiert oder einstückig mit der Kolbennabe 22 gegossen oder geschmiedet sein kann. Das Zuführelement 127 weist einen Zuführkanal 128 auf, dessen erstes Ende 129a zur Nabenbohrung 23 gerichtet und dessen zweites Ende 129b zum freien Ende des Kolbenschafts 21 gerichtet ist. Im montierten Zustand ist das erste Ende 129a des Zuführkanals 128 zur Innenbohrung 24a des Kolbenbolzens 24 gerichtet. Das zweite Ende 129b ist in diesem Fall zu einer an sich bekannten Anspritzdüse 133 gerichtet. Diese Konstruktion erlaubt es, aus der Anspritzdüse 133 austretendes Kühlmittel im Zuführkanal 128 des Zuführelements 127 aufzufangen und in Richtung der Innenbohrung 24a des Kolbenbolzens 24 zu leiten und die Kühlung des Kolbenbolzens 24 zu intensivieren. Die Anspritzdüse 133 kann separat vorgesehen sein, so dass der gesamte aus ihr austretende Kühlmittelstrahl in das Zuführelement 127 geleitet wird. Die Anspritzdüse 133 kann aber auch grundsätzlich zur Kolbenkühlung vorgesehen sein, so dass nur ein bestimmter Anteil des aus ihr austretenden Kühlmittelstrahls vom Zuführelement 127 aufgefangen wird. According to the invention, a feed element 127 is provided in this embodiment on a piston hub 22 of the piston 110, which may for example be glued, welded, positively fixed or cast integrally with the piston hub 22 or forged. The feed element 127 has a feed channel 128, whose first end 129a is directed towards the hub bore 23 and whose second end 129b is directed towards the free end of the piston skirt 21. In the mounted state, the first end 129 a of the feed channel 128 is directed to the inner bore 24 a of the piston pin 24. The second end 129b is directed in this case to a conventional injection nozzle 133. This construction makes it possible to trap coolant emerging from the injection nozzle 133 in the feed channel 128 of the feed element 127 and to guide it in the direction of the inner bore 24a of the piston pin 24 and to intensify the cooling of the piston pin 24. The injection nozzle 133 may be provided separately, so that the entire coolant jet emerging from it is directed into the feed element 127. However, the injection nozzle 133 may also be provided in principle for piston cooling, so that only a certain proportion of the coolant jet emerging from it is collected by the feed element 127.
Die Figuren 5 und 6 zeigen ein weiteres Ausführungsbeispiel eines erfindungsgemäßen Kolbens 210. Der Kolben 210 entspricht im Wesentlichen dem Kolben 10 gemäß den Figuren 1 und 2, so dass übereinstimmende Strukturelemente mit denselben Bezugszeichen versehen sind und diesbezüglich auf die Beschreibung zu den Figuren 1 und 2 verwiesen wird. Erfindungsgemäß ist bei diesem Ausführungsbeispiel an einer Kolbennabe 22 des Kolbens 210 ein Zuführelement 227 vorgesehen, das beispielsweise geklebt, geschweißt, formschlüssig fixiert oder einstückig mit der Kolbennabe 22 gegossen oder geschmiedet sein kann. Das Zuführelement 227 weist einen ersten Zuführkanal 228a auf, dessen erstes Ende 229a zur Nabenbohrung 23 gerichtet und dessen zweites Ende 229b zum freien Ende des Kolbenschafts 21 gerichtet ist. Im montierten Zustand ist das erste Ende 229a des ersten Zuführkanals 228a zur Innenbohrung 24a des Kolbenbolzens 24 gerichtet. Das zweite Ende 229b ist in diesem Fall zu einer an sich bekannten Anspritzdüse 233 gerichtet. Diese Konstruktion erlaubt es, aus der Anspritzdüse 233 austretendes Kühlmittel im Zuführkanal 228a des Zuführelements 227 aufzufangen und in Richtung der Innenbohrung 24a des Kolbenbolzens 24 zu leiten und die Kühlung des Kolbenbolzens 24 zu intensivieren. Die Anspritzdüse 233 kann separat vorgesehen sein, so dass der gesamte aus ihr austretende Kühlmittelstrahl in das Zuführelement 227 geleitet wird. Die Anspritzdüse 233 kann aber auch grundsätzlich zur Kolbenkühlung vorgesehen sein, so dass nur ein bestimmter Anteil des aus ihr austretenden Kühlmittelstrahls vom Zuführelement 227 aufgefangen wird. FIGS. 5 and 6 show a further exemplary embodiment of a piston 210 according to the invention. The piston 210 substantially corresponds to the piston 10 according to FIGS. 1 and 2, so that matching structural elements are provided with the same reference numerals and in this respect to the description of FIGS. 1 and 2 is referenced. According to the invention, a feed element 227 is provided in this embodiment on a piston hub 22 of the piston 210, which may for example be glued, welded, positively fixed or cast integrally with the piston hub 22 or forged. The feed element 227 has a first feed channel 228a, whose first end 229a is directed towards the hub bore 23 and whose second end 229b is directed toward the free end of the piston skirt 21. In the assembled state, the first end 229 a of the first supply channel 228 a to the inner bore 24 a of the piston pin 24 is directed. The second end 229b is directed in this case to a known Anspritzdüse 233. This construction makes it possible to trap coolant emerging from the injection nozzle 233 in the feed channel 228a of the feed element 227 and to guide it in the direction of the inner bore 24a of the piston pin 24 and to intensify the cooling of the piston pin 24. The injection nozzle 233 can be provided separately, so that the entire coolant jet emerging from it is directed into the feed element 227. However, the injection nozzle 233 can also be provided in principle for piston cooling, so that only a certain proportion of the coolant jet emerging from it is collected by the feed element 227.
Erfindungsgemäß ist ferner im Zuführelement 227 ein zweiter Zuführkanal 228b vorgesehen, dessen erstes Ende 234a zur Nabenbohrung 23 gerichtet und dessen zweites Ende 234b zu einer Kühlmittelauslassöffnung 17 des Kühlkanals 16 gerichtet ist. Im montierten Zustand ist das erste Ende 234a des zweiten Zuführkanals 228b zur Innenbohrung 24a des Kolbenbolzens 24 gerichtet. Diese Konstruktion erlaubt es, aus der Kühlmittelauslassöffnung 17 austretendes Kühlmittel in Richtung der Innenbohrung 24a des Kolbenbolzens 24 zu leiten und die Kühlung des Kolbenbolzens 24 zu intensivieren. According to the invention, a second feed channel 228b is further provided in the feed element 227, whose first end 234a is directed toward the hub bore 23 and whose second end 234b is directed toward a coolant outlet opening 17 of the cooling channel 16. In the assembled state, the first end 234 a of the second feed channel 228 b is directed to the inner bore 24 a of the piston pin 24. This construction makes it possible to guide coolant emerging from the coolant outlet opening 17 in the direction of the inner bore 24a of the piston pin 24 and to intensify the cooling of the piston pin 24.
Figur 7 zeigt eine vergrößerte Darstellung eines Ausführungsbeispiels eines Zuführelements 27, 127, 227. Dieses Zuführelement weist innerhalb seines Zuführkanals 28, 128, 228a, 228b ein im Ausführungsbeispiel konisch gestaltetes Richtelement 335 auf. Das Richtelement 335 dient zur bündeiförmigen Ausrichtung und effektiven Weiterleitung des vom Zuführelement 27, 127, 227 aufgefangenen Kühlmittelstrahls. Zweckmäßigerweise ist der Zuführkanal 28, 128, 228a, 228b im Querschnitt konisch ausgestaltet, um das Auffangen des Kühlmittelstrahls besonders ef- fektiv zu gestalten. Das Zuführelement kann auch als metallisches oder nichtmetallisches gebogenes Rohr oder flexibler Schlauch ausgeführt sein. Figure 7 shows an enlarged view of an embodiment of a feed element 27, 127, 227. This feed element has within its feed channel 28, 128, 228a, 228b in the embodiment conically shaped straightening element 335. The straightening element 335 serves for the bundle-shaped alignment and effective forwarding of the coolant jet collected by the feed element 27, 127, 227. Expediently, the feed channel 28, 128, 228a, 228b is configured conically in cross-section in order to make the collection of the coolant jet particularly ef- to make it more effective. The feed element can also be designed as a metallic or non-metallic bent pipe or flexible hose.
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE201210022907 DE102012022907A1 (en) | 2012-11-23 | 2012-11-23 | Piston for an internal combustion engine and arrangement of a piston and a piston pin |
| DE102012022907.0 | 2012-11-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2014079407A1 true WO2014079407A1 (en) | 2014-05-30 |
Family
ID=49882729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/DE2013/000689 Ceased WO2014079407A1 (en) | 2012-11-23 | 2013-11-22 | Piston for an internal combustion engine, and arrangement comprising a piston and a piston pin |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE102012022907A1 (en) |
| WO (1) | WO2014079407A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10865734B2 (en) | 2017-12-06 | 2020-12-15 | Ai Alpine Us Bidco Inc | Piston assembly with offset tight land profile |
| WO2021223421A1 (en) * | 2020-05-08 | 2021-11-11 | 广西玉柴机器股份有限公司 | Piston head cooling structure |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102014210875A1 (en) * | 2014-06-06 | 2015-12-17 | Federal-Mogul Nürnberg GmbH | Piston and process for its production |
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|---|---|---|---|---|
| US2048002A (en) * | 1934-08-29 | 1936-07-21 | Ingersoll Rand Co | Cooling device for pistons |
| US2323310A (en) * | 1942-01-28 | 1943-07-06 | Cornelius S Clark | Piston |
| US2541919A (en) * | 1948-03-19 | 1951-02-13 | Fairbanks Morse & Co | Piston cooling |
| US2788774A (en) * | 1953-11-09 | 1957-04-16 | Napier & Son Ltd | Fluid cooling of reciprocating pistons |
| DE1055879B (en) * | 1955-03-23 | 1959-04-23 | Schmidt Gmbh Karl | Oil-cooled pistons for diesel engines in vehicles |
| SU1283432A1 (en) * | 1984-10-01 | 1987-01-15 | Горьковский Автомобильный Завод | Cooled piston for internal combustion engine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB846995A (en) * | 1958-04-18 | 1960-09-07 | Nat Res Dev | Improvements in or relating to trunk piston engines |
| DE1259138B (en) * | 1962-11-13 | 1968-01-18 | Goetaverken Ab | Crosshead bolts for internal combustion engines, especially two-stroke internal combustion engines |
| GB1229715A (en) * | 1969-11-14 | 1971-04-28 | ||
| FR2238372A5 (en) * | 1973-07-19 | 1975-02-14 | Dampers | |
| JPH063263B2 (en) * | 1986-07-07 | 1994-01-12 | 日本特殊陶業株式会社 | Lubrication mechanism between piston pin and snap ring |
| DE10255892A1 (en) * | 2002-11-29 | 2004-06-09 | Mahle Gmbh | Piston for combustion engine has oil trap on outer surfaces of boss close to zenith of gudgeon pin borings |
| FR2927666A3 (en) * | 2008-02-15 | 2009-08-21 | Renault Sas | PISTON FOR COMBUSTION ENGINE. |
-
2012
- 2012-11-23 DE DE201210022907 patent/DE102012022907A1/en not_active Withdrawn
-
2013
- 2013-11-22 WO PCT/DE2013/000689 patent/WO2014079407A1/en not_active Ceased
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2048002A (en) * | 1934-08-29 | 1936-07-21 | Ingersoll Rand Co | Cooling device for pistons |
| US2323310A (en) * | 1942-01-28 | 1943-07-06 | Cornelius S Clark | Piston |
| US2541919A (en) * | 1948-03-19 | 1951-02-13 | Fairbanks Morse & Co | Piston cooling |
| US2788774A (en) * | 1953-11-09 | 1957-04-16 | Napier & Son Ltd | Fluid cooling of reciprocating pistons |
| DE1055879B (en) * | 1955-03-23 | 1959-04-23 | Schmidt Gmbh Karl | Oil-cooled pistons for diesel engines in vehicles |
| SU1283432A1 (en) * | 1984-10-01 | 1987-01-15 | Горьковский Автомобильный Завод | Cooled piston for internal combustion engine |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10865734B2 (en) | 2017-12-06 | 2020-12-15 | Ai Alpine Us Bidco Inc | Piston assembly with offset tight land profile |
| WO2021223421A1 (en) * | 2020-05-08 | 2021-11-11 | 广西玉柴机器股份有限公司 | Piston head cooling structure |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102012022907A1 (en) | 2014-05-28 |
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