EP3008318B1 - Slide shoe for a piston for use in internal combustion engines - Google Patents

Slide shoe for a piston for use in internal combustion engines Download PDF

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Publication number
EP3008318B1
EP3008318B1 EP14731587.3A EP14731587A EP3008318B1 EP 3008318 B1 EP3008318 B1 EP 3008318B1 EP 14731587 A EP14731587 A EP 14731587A EP 3008318 B1 EP3008318 B1 EP 3008318B1
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EP
European Patent Office
Prior art keywords
piston
sliding shoe
channel
connecting rod
radially circumferential
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EP14731587.3A
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German (de)
French (fr)
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EP3008318A1 (en
Inventor
Matthias Laqua
Markus PINZ
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KS Kolbenschmidt GmbH
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KS Kolbenschmidt GmbH
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F3/00—Pistons 
    • F02F3/16—Pistons  having cooling means
    • F02F3/20—Pistons  having cooling means the means being a fluid flowing through or along piston
    • F02F3/22—Pistons  having cooling means the means being a fluid flowing through or along piston the fluid being liquid
    • 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
    • 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 
    • F02F3/28—Other pistons with specially-shaped head
    • 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 
    • F02F3/28—Other pistons with specially-shaped head
    • F02F3/285—Other pistons with specially-shaped head the head being provided with an insert located in or on the combustion-gas-swept surface

Definitions

  • the invention relates to a piston of an internal combustion engine, the piston having a sliding shoe mounted in an energy accumulator and the sliding shoe having a channel for taking cooling oil into a cavity, according to the features of the preamble of patent claim 1.
  • the DE 40 18 252 describes an oil-cooled piston which is assembled from at least one upper piston part with a combustion bowl and a lower piston part.
  • the piston comprises a central cooling chamber, into which a cooling oil feed line opens, an outer cooling chamber formed by cooling bores directed obliquely outwards to the edge between the piston crown and piston skirt, as well as at least one cooling oil collection chamber connected thereto and from which at least one cooling oil discharge line starts, and from the central cooling chamber connecting lines running obliquely upwards to the bases of the cooling oil bores, at least one guide body being arranged in the outer cooling space below the cooling bores, which guide body forms a nozzle-shaped through-opening tapering towards the piston base with the inner cooling space wall and a return passage with the outer cooling space wall .
  • the FR 2 371 581 A1 shows an arrangement comprising a piston and a cylinder for an internal combustion engine, the wall of the cylinder having cooling passages, the passages being restricted to the parts of the wall surrounding the combustion zone of the cylinder, and the piston a has internal cooling system.
  • the GB 2 033 525 A describes a hydraulic ram with a ram cylinder, a piston slidable therein for direct or indirect actuation of a valve, a pressure chamber within the ram for holding oil, the volume of oil within the pressure chamber controlling the position of the piston in the ram cylinder, a reservoir for holding Oil from a pressurized oil reservoir and cam actuated means to bring the pressure chamber into communication with the reservoir and thereby adjust the position of the piston to take up backlash.
  • the U.S. 2,442,408 A shows a piston cooling device in which a part of the piston forming a piston head is a separate element from, but connected to, a part of the piston associated with a piston skirt.
  • the DE 100 22 035 A1 discloses an internal combustion engine with an assembled piston consisting of a steel piston crown and a piston skirt, which are connected to each other by a single screw arranged in the central axis or near the central axis of the piston, and with a central cooling space between the piston crown and the piston skirt, and with an oil-carrying connecting rod, which is connected to the piston skirt by a gudgeon pin.
  • the sliding shoe has the task of directing the cooling oil, which rises through the connecting rod, into the piston.
  • the sliding shoe is like that designed so that the connecting rod sits directly on the slide shoe and thereby participates in or reproduces the pivoting movement of the connecting rod.
  • the state of the art is as follows: the spring (energy accumulator) sits within the guide. As a result, the diameter and thus the pretensioning force is low, in order to raise it, certain spring effects must be present.
  • the object of the invention is to achieve a reduction in installation space between the connecting rod and the piston.
  • the energy accumulator is arranged in a radially circumferential channel formed by the piston and the sliding shoe is partially guided within the energy accumulator.
  • the task is thus solved in an advantageous manner by reducing the installation space while at the same time increasing the vertical guide length.
  • the spring coils had to be shortened and the necessary pretensioning force generated at the same time. This was achieved by increasing the spring diameter.
  • the guide of the slide shoe is now on the inside and the spring on the outside.
  • a further advantage of the structure according to the invention is that the vertical guide length of the slide shoe is increased while the installation space is reduced at the same time.
  • the radially circumferential channel formed by the piston is formed circumferentially around the sliding shoe. This structure enables the sliding shoe to be guided evenly.
  • the force accumulator exerts an even force on the sliding shoe.
  • the radially encircling channel formed by the piston also accommodates a radially encircling guide element of the sliding shoe in addition to the force accumulator.
  • the guide element serves as a point of application for the force accumulator and stabilizes the sliding shoe in the channel.
  • a sleeve limits the path of the sliding shoe. Due to the travel limited by the sleeve, the slide shoe receives a defined end stop.
  • a locking ring prevents the loss of the sliding shoe when the piston and connecting rod head separate.
  • the securing ring not only prevents the loss of the slide shoe, but also advantageously forms a further stop in the travel path of the slide shoe as an alternative or in addition to the safety function.
  • the piston has a sliding shoe for use in an internal combustion engine, comprising a lower piston part and an upper piston part, the sliding shoe having a channel for taking over cooling oil from a connecting rod head into a cavity, with an energy accumulator being guided in a channel .
  • top, bottom, left, right, front, rear, etc. refer exclusively to the exemplary representation and position of the device and other elements selected in the figures. These terms are not to be understood as limiting, that is to say these references can change as a result of different positions and/or mirror-symmetrical design or the like.
  • the figure 1 shows a piston 1 which is made up of a lower piston part 2 and an upper piston part 3 .
  • the piston 1 has a slide shoe 4.
  • the slide shoe 4 is pretensioned by means of an energy accumulator 5, designed in particular as a compression spring and further in particular as a spiral spring. In a piston-connecting rod system, this takes place against a connecting rod head 8 .
  • a disk 6 which transmits the forces from the force accumulator 5 to the sliding shoe 4 , can be arranged between the force accumulator 5 and the sliding shoe 4 , but does not have to do so.
  • a locking ring 7 is optionally provided.
  • the slide shoe 4 On a connecting rod 8 of the sliding shoe 4 is on with sliding elements on its outer circumference.
  • the slide shoe 4 has a central channel 10 for conducting a medium, for example cooling oil, into a cavity 11 of the piston 1 .
  • a medium for example cooling oil
  • the channel 10 Downward (when looking at the figures), in the direction of the connecting rod head 8, the channel 10 widens in a funnel shape. Due to the funnel-shaped structure, the medium from the connecting rod head 8 can easily in the enter channel 10.
  • the connecting rod head 8 is fed with the medium through an inflow in the connecting rod.
  • Cavity 11 is preferably located below the combustion chamber of piston 1.
  • the figure 2 shows the area of the sliding shoe 4 as a detail.
  • the figure 3 shows a detail of the guidance of the sliding shoe 4.
  • the guiding of the sliding shoe 4 takes place in a radially circumferential channel 12.
  • a radially circumferential guide element 13 of the sliding shoe 4 is displaceably mounted.
  • the channel 12 also accommodates the force accumulator 5 and the disc 6 .
  • the disk 6 is supported on the guide element 13 and is subjected to a force in the direction of the connecting rod head 8 by the energy accumulator 5 .
  • the energy store 5 is supported at its opposite end on the closed end area 14 of the channel 12 .
  • the sliding shoe 4 can, but does not have to, be guided in a central sleeve. This sleeve is formed integrally with the lower piston part 2 .
  • the wall of the sleeve forms the boundary for the channel 12 at the same time. Due to the parallel guidance of the sliding shoe 4 in the channel 12 and the sleeve, there is a stable, secure mounting of the sliding shoe 4 in the piston.

Description

Die Erfindung betrifft einen Kolben einer Brennkraftmaschine, wobei der Kolben einen in einem Kraftspeicher gelagerten Gleitschuh aufweist und wobei der Gleitschuh einen Kanal zur Übernahme von Kühlöl in einen Hohlraum aufweist, gemäß den Merkmalen des Oberbegriffes des Patentanspruches 1.The invention relates to a piston of an internal combustion engine, the piston having a sliding shoe mounted in an energy accumulator and the sliding shoe having a channel for taking cooling oil into a cavity, according to the features of the preamble of patent claim 1.

Die DE 40 18 252 beschreibt einen ölgekühlten Kolben, der zumindest aus einem Kolbenoberteil mit einer Brennraummulde und einem Kolbenunterteil zusammengebaut ist. Der Kolben umfasst einen zentralen Kühlraum, in den eine Kühlölzuleitung mündet, einen äußeren Kühlraum, der durch schräg nach außen zur Kante zwischen Kolbenboden und Kolbenmantel gerichtete Kühlbohrungen sowie mindestens einen daran anschließenden Kühlölsammelraum gebildet ist und von dem mindestens eine Kühlölabführleitung ausgeht, und vom zentralen Kühlraum schräg nach aufwärts zu den Böden der Kühlölbohrungen verlaufende Verbindungsleitungen, wobei in dem äußeren Kühlraum unterhalb der Kühlbohrungen mindestens ein Leitkörper angeordnet ist, der mit der inneren Kühlraum-Wandung eine sich zum Kolbenboden verjüngende, düsenförmige Durchtrittsöffnung und mit der äußeren Kühlraum-Wandung einen Rücklaufdurchlass bildet.the DE 40 18 252 describes an oil-cooled piston which is assembled from at least one upper piston part with a combustion bowl and a lower piston part. The piston comprises a central cooling chamber, into which a cooling oil feed line opens, an outer cooling chamber formed by cooling bores directed obliquely outwards to the edge between the piston crown and piston skirt, as well as at least one cooling oil collection chamber connected thereto and from which at least one cooling oil discharge line starts, and from the central cooling chamber connecting lines running obliquely upwards to the bases of the cooling oil bores, at least one guide body being arranged in the outer cooling space below the cooling bores, which guide body forms a nozzle-shaped through-opening tapering towards the piston base with the inner cooling space wall and a return passage with the outer cooling space wall .

Die FR 2 371 581 A1 zeigt eine Anordnung umfassend einen Kolben und einen Zylinder für einen Verbrennungsmotor, wobei die Wand des Zylinders Kühlkanäle aufweist, wobei die Kanäle auf die Teile der Wand beschränkt sind, die die Verbrennungszone des Zylinders umgeben, und wobei der Kolben ein inneres Kühlsystem aufweist.the FR 2 371 581 A1 shows an arrangement comprising a piston and a cylinder for an internal combustion engine, the wall of the cylinder having cooling passages, the passages being restricted to the parts of the wall surrounding the combustion zone of the cylinder, and the piston a has internal cooling system.

Die GB 2 033 525 A beschreibt einen hydraulischen Stößel mit einem Stößelzylinder, einem darin verschiebbaren Kolben zur direkten oder indirekten Betätigung eines Ventils, einer Druckkammer innerhalb des Stößels zur Aufnahme von Öl, wobei das Ölvolumen innerhalb der Druckkammer die Position des Kolbens in dem Stößelzylinder steuert, einem Vorratsbehälter zur Aufnahme von Öl aus einem unter Druck stehenden Ölvorrat und einer mit einem Nocken betätigbaren Einrichtung, um die Druckkammer in Verbindung mit dem Vorratsbehälter zu bringen und dadurch die Position des Kolbens zum Ausgleich des Spiels einzustellen.the GB 2 033 525 A describes a hydraulic ram with a ram cylinder, a piston slidable therein for direct or indirect actuation of a valve, a pressure chamber within the ram for holding oil, the volume of oil within the pressure chamber controlling the position of the piston in the ram cylinder, a reservoir for holding Oil from a pressurized oil reservoir and cam actuated means to bring the pressure chamber into communication with the reservoir and thereby adjust the position of the piston to take up backlash.

Die US 2 442 408 A zeigt eine Kolbenkühlungsvorrichtung, bei welcher ein Teil des Kolbens, welches einen Kolbenkopf bildet, ein von einem Teil des Kolbens, welches einem Kolbenschaft zugehörig ist, ein getrenntes, aber mit diesem verbundenes Element ist.the U.S. 2,442,408 A shows a piston cooling device in which a part of the piston forming a piston head is a separate element from, but connected to, a part of the piston associated with a piston skirt.

Die DE 100 22 035 A1 offenbart einen Verbrennungsmotor mit einem gebauten Kolben, bestehend aus einem Kolbenboden aus Stahl und einem Kolbenunterteil, die über eine einzige, in der Mittelachse oder nahe der Mittelachse des Kolbens angeordnete Schraube miteinander verbunden sind, und mit einem zentralen Kühlraum zwischen Kolbenboden und Kolbenunterteil, sowie mit einem ölführenden Pleuel, das durch einen Kolbenbolzen mit dem Kolbenunterteil verbunden ist.the DE 100 22 035 A1 discloses an internal combustion engine with an assembled piston consisting of a steel piston crown and a piston skirt, which are connected to each other by a single screw arranged in the central axis or near the central axis of the piston, and with a central cooling space between the piston crown and the piston skirt, and with an oil-carrying connecting rod, which is connected to the piston skirt by a gudgeon pin.

Zwischen Kolben und Pleuel besteht nur ein geringer Abstand. Mit der heutigen Lösung, der Geometrie des Gleitschuhes ist eine Führung des Gleitschuhes im Kolben nicht möglich. Der Gleitschuh hat die Aufgabe, das Kühlöl, welches durch das Pleuel aufsteigt, in den Kolben hineinzuleiten. Dabei ist der Gleitschuh so ausgeführt, dass das Pleuel direkt auf dem Gleitschuh sitzt und dabei die Schwenkbewegung des Pleuels mitmacht bzw. nachvollzieht. Der Stand der Technik stellt sich wie folgt dar, dass die Feder (Kraftspeicher) innerhalb der Führung sitzt. Dadurch ist der Durchmesser und somit die Vorspannkraft gering, um diese anzuheben müssen bestimmte Federwirkungen vorhanden sein.There is only a small distance between the piston and the connecting rod. With today's solution, the geometry of the sliding shoe, it is not possible to guide the sliding shoe in the piston. The sliding shoe has the task of directing the cooling oil, which rises through the connecting rod, into the piston. The sliding shoe is like that designed so that the connecting rod sits directly on the slide shoe and thereby participates in or reproduces the pivoting movement of the connecting rod. The state of the art is as follows: the spring (energy accumulator) sits within the guide. As a result, the diameter and thus the pretensioning force is low, in order to raise it, certain spring effects must be present.

Aufgabe der Erfindung ist es, eine Bauraumverringerung zwischen Pleuel und Kolben zu erreichen.The object of the invention is to achieve a reduction in installation space between the connecting rod and the piston.

Diese Aufgabe wird durch einen Kolben mit den Merkmalen des unabhängigen Patentanspruches 1 gelöst.This object is solved by a piston having the features of independent patent claim 1 .

Erfindungsgemäß ist vorgesehen, dass der Kraftspeicher in einem von dem Kolben gebildeten, radial umlaufenden Kanal angeordnet und der Gleitschuh teilweise innerhalb des Kraftspeichers geführt ist.According to the invention, it is provided that the energy accumulator is arranged in a radially circumferential channel formed by the piston and the sliding shoe is partially guided within the energy accumulator.

Gelöst wird die Aufgabe somit in vorteilhafter Weise durch Reduzierung des Bauraumes bei gleichzeitiger Erhöhung der vertikalen Führungslänge. Bei der Aufgabenstellung ausgehend vom Stand der Technik stand nicht ausreichend Bauraum zur Verfügung, daher mussten Federwindungen gekürzt werden und gleichzeitig die nötige Vorspannkraft erzeugt werden. Dieses wurde durch die Erhöhung des Federdurchmessers erreicht. Die Führung des Gleitschuhes sitzt nun innen und die Feder außen. Ein weiterer Vorteil des erfindungsgemäßen Aufbaus ist, dass bei gleichzeitiger Reduzierung des Bauraumes trotzdem die vertikale Führungslänge des Gleitschuhes erhöht wird.The task is thus solved in an advantageous manner by reducing the installation space while at the same time increasing the vertical guide length. When the task was based on the state of the art, there was not enough space available, so the spring coils had to be shortened and the necessary pretensioning force generated at the same time. This was achieved by increasing the spring diameter. The guide of the slide shoe is now on the inside and the spring on the outside. A further advantage of the structure according to the invention is that the vertical guide length of the slide shoe is increased while the installation space is reduced at the same time.

Weiterhin ist es in vorteilhafter Weise vorgesehen, dass der von dem Kolben gebildete, radial umlaufende Kanal umlaufend um den Gleitschuh ausgebildet ist. Durch diesen Aufbau ist eine gleichmäßige Führung des Gleitschuhs ermöglicht.Furthermore, it is advantageously provided that the radially circumferential channel formed by the piston is formed circumferentially around the sliding shoe. This structure enables the sliding shoe to be guided evenly.

Weiterhin übt der Kraftspeicher so eine gleichmäßige Kraft auf den Gleitschuh aus.Furthermore, the force accumulator exerts an even force on the sliding shoe.

Weiterhin ist es erfindungsgemäß vorgesehen, dass der von dem Kolben gebildete, radial umlaufende Kanal neben dem Kraftspeicher auch ein radial umlaufendes Führungselement des Gleitschuhes aufnimmt. Das Führungselement dient als Angriffspunkt für den Kraftspeicher und stabilisiert den Gleitschuh im Kanal.Furthermore, it is provided according to the invention that the radially encircling channel formed by the piston also accommodates a radially encircling guide element of the sliding shoe in addition to the force accumulator. The guide element serves as a point of application for the force accumulator and stabilizes the sliding shoe in the channel.

Weiterhin ist es in vorteilhafter Weise vorgesehen, dass eine Hülse den Weg des Gleitschuhs begrenzt. Durch den über die Hülse begrenzten Weg erhält der Gleitschuh einen definierten Endanschlag.Furthermore, it is advantageously provided that a sleeve limits the path of the sliding shoe. Due to the travel limited by the sleeve, the slide shoe receives a defined end stop.

Weiterhin ist es in vorteilhafter Weise vorgesehen, dass ein Sicherungsring den Verlust des Gleitschuhs bei einer Trennung von Kolben und Pleuelkopf verhindert. Der Sicherungsring verhindert nicht nur den Verlust des Gleitschuhs, sondern bildet in vorteilhafter Weise alternativ oder ergänzend zu der Sicherungsfunktion einen weiteren Anschlag im Verfahrweg des Gleitschuhs.Furthermore, it is advantageously provided that a locking ring prevents the loss of the sliding shoe when the piston and connecting rod head separate. The securing ring not only prevents the loss of the slide shoe, but also advantageously forms a further stop in the travel path of the slide shoe as an alternative or in addition to the safety function.

Weiterhin ist in vorteilhafter Weise vorgesehen, dass der Kolben mit einem Gleitschuh zum Einsatz in Brennkraftmaschine, umfassend ein Kolbenunterteil und ein Kolbenoberteil, wobei der Gleitschuh einen Kanal zur Übernahme von Kühlöl von einem Pleuelkopf in einen Hohlraum aufweist, wobei ein Kraftspeicher in einem Kanal geführt ist. Hierdurch ist ein kompakter Aufbau des Kolbens möglich, da der Kraftspeicher raumsparend in dem Kanal geführt ist.Furthermore, it is advantageously provided that the piston has a sliding shoe for use in an internal combustion engine, comprising a lower piston part and an upper piston part, the sliding shoe having a channel for taking over cooling oil from a connecting rod head into a cavity, with an energy accumulator being guided in a channel . This allows for a compact design of the piston, since the force accumulator is guided in the channel in a space-saving manner.

Die Erfindung wird anhand der nachfolgend beschriebenen Figuren weiter verdeutlicht.

Figur 1:
zeigt einen erfindungsgemäßen Kolben,
Figur 2:
zeigt als Detail II aus Figur 1 den Bereich des Gleitschuhs und
Figur 3:
zeigt als Detail III aus Figur 2 die Führung des Gleitschuhs.
The invention is further illustrated by the figures described below.
Figure 1:
shows a piston according to the invention,
Figure 2:
shows as Detail II figure 1 the area of the sliding shoe and
Figure 3:
shows as Detail III figure 2 the guide of the sliding shoe.

In der nachfolgenden Figurenbeschreibung beziehen sich Begriffe wie oben, unten, links, rechts, vorne, hinten usw. ausschließlich auf die in den Figuren gewählte beispielhafte Darstellung und Position der Vorrichtung und anderer Elemente. Diese Begriffe sind nicht einschränkend zu verstehen, das heißt durch verschiedene Positionen und/oder spiegelsymmetrische Auslegung oder dergleichen können sich diese Bezüge ändern.In the following description of the figures, terms such as top, bottom, left, right, front, rear, etc. refer exclusively to the exemplary representation and position of the device and other elements selected in the figures. These terms are not to be understood as limiting, that is to say these references can change as a result of different positions and/or mirror-symmetrical design or the like.

Die Figur 1 zeigt einen Kolben 1, welcher aus einem Kolbenunterteil 2 und einem Kolbenoberteil 3 aufgebaut ist. Der Kolben 1verfügt über einen Gleitschuh 4. Über einen Kraftspeicher 5, ausgeführt insbesondere als Druckfeder und weiters insbesondere als Spiralfeder, wird der Gleitschuh 4 vorgespannt. Dies erfolgt bei einem Kolben-Pleuel-System gegen einen Pleuelkopf 8. Zwischen Kraftspeicher 5 und Gleitschuh 4 kann, muss aber nicht, eine Scheibe 6 angeordnet sein, die die Kräfte von dem Kraftspeicher 5 auf den Gleitschuh 4 überträgt. Um den Gleitschuh 4 vor dem Herausfallen aus der Führung im Kolben 1 zu bewahren, ist optional ein Sicherungsring 7 vorgesehen. Auf einem Pleuelkopf 8 liegt der Gleitschuh 4 mit Gleitelementen auf dessen äußeren Umfang auf. Der Gleitschuh 4 weist einen zentralen Kanal 10 zur Durchleitung eines Mediums, beispielsweise Kühlöl, in einen Hohlraum 11 des Kolbens 1 auf. Nach unten (bei Betrachten der Figuren) hin, in Richtung des Pleuelkopfes 8, weitet sich der Kanal 10 trichterförmig auf. Durch den trichterförmigen Aufbau kann das Medium von dem Pleuelkopf 8 leichter in den Kanal 10 gelangen. Der Pleuelkopf 8 wird durch einen Zufluss im Pleuel mit dem Medium gespeist. Der Hohlraum 11 befindet sich bevorzugt unter dem Brennraum des Kolbens 1.the figure 1 shows a piston 1 which is made up of a lower piston part 2 and an upper piston part 3 . The piston 1 has a slide shoe 4. The slide shoe 4 is pretensioned by means of an energy accumulator 5, designed in particular as a compression spring and further in particular as a spiral spring. In a piston-connecting rod system, this takes place against a connecting rod head 8 . A disk 6 , which transmits the forces from the force accumulator 5 to the sliding shoe 4 , can be arranged between the force accumulator 5 and the sliding shoe 4 , but does not have to do so. In order to prevent the sliding shoe 4 from falling out of the guide in the piston 1, a locking ring 7 is optionally provided. On a connecting rod 8 of the sliding shoe 4 is on with sliding elements on its outer circumference. The slide shoe 4 has a central channel 10 for conducting a medium, for example cooling oil, into a cavity 11 of the piston 1 . Downward (when looking at the figures), in the direction of the connecting rod head 8, the channel 10 widens in a funnel shape. Due to the funnel-shaped structure, the medium from the connecting rod head 8 can easily in the enter channel 10. The connecting rod head 8 is fed with the medium through an inflow in the connecting rod. Cavity 11 is preferably located below the combustion chamber of piston 1.

Die Figur 2 zeigt als Detail den Bereich des Gleitschuhes 4.the figure 2 shows the area of the sliding shoe 4 as a detail.

Die Figur 3 zeigt als Detail die Führung des Gleitschuhes 4. Die Führung des Gleitschuhes 4 erfolgt in einem radial umlaufenden Kanal 12. In diesem Kanal 12 ist ein radial umlaufendes Führungselement 13 des Gleitschuhes 4 verschiebbar gelagert. Auch nimmt der Kanal 12 den Kraftspeicher 5 sowie die Scheibe 6 auf. Die Scheibe 6 stützt sich auf dem Führungselement 13 ab und wird durch den Kraftspeicher 5 mit einer Kraft in Richtung des Pleuelkopfes 8 beaufschlagt. Der Kraftspeicher 5 stützt sich an seinem gegenüberliegenden Ende am verschlossenen Endbereich 14 des Kanals 12 ab. Weiterhin kann, muss aber nicht, der Gleitschuh 4 in einer zentralen Hülse geführt werden. Diese Hülse ist integral mit dem Kolbenunterteil 2 ausgebildet. Die Wandung der Hülse bildet zugleich die Begrenzung für den Kanal 12 aus. Durch die parallele Führung des Gleitschuhes 4 im Kanal 12 und der Hülse erfolgt eine stabile, sichere Lagerung des Gleitschuhes 4 im Kolben.the figure 3 shows a detail of the guidance of the sliding shoe 4. The guiding of the sliding shoe 4 takes place in a radially circumferential channel 12. In this channel 12, a radially circumferential guide element 13 of the sliding shoe 4 is displaceably mounted. The channel 12 also accommodates the force accumulator 5 and the disc 6 . The disk 6 is supported on the guide element 13 and is subjected to a force in the direction of the connecting rod head 8 by the energy accumulator 5 . The energy store 5 is supported at its opposite end on the closed end area 14 of the channel 12 . Furthermore, the sliding shoe 4 can, but does not have to, be guided in a central sleeve. This sleeve is formed integrally with the lower piston part 2 . The wall of the sleeve forms the boundary for the channel 12 at the same time. Due to the parallel guidance of the sliding shoe 4 in the channel 12 and the sleeve, there is a stable, secure mounting of the sliding shoe 4 in the piston.

BEZUGSZEICHENLISTEREFERENCE LIST

11
KolbenPistons
22
Kolbenunterteilbuttstock
33
Kolbenoberteilpiston top
44
Gleitschuhsliding shoe
55
Kraftspeicher (Druckfeder)Energy accumulator (compression spring)
66
Scheibedisc
77
Sicherungsringlocking ring
88th
Pleuelkopfconnecting rod head
1010
Kanalchannel
1111
Hohlraumcavity
1212
Kanalchannel
1313
Führungselementguide element
1414
Endbereichend area

Claims (5)

  1. Piston (1) of an internal combustion engine, the piston (1) having a force accumulator (5) and a sliding shoe (4), the sliding shoe (4) having a channel (10) for receiving cooling oil into a cavity (11) of the piston (1), the force accumulator (5) being arranged in a radially circumferential channel (12) formed by the piston (1), in which the sliding shoe (4) is guided, wherein the sliding shoe (4) is partially guided within the force accumulator (5), and wherein the radially circumferential channel (12) receives, in addition to the force accumulator (5), at least one radially circumferential guide element (13) of the sliding shoe (4), which is displaceably mounted in the radially circumferential channel (12).
  2. Piston (1) according to claim 1, characterized in that the radially circumferential channel (12) formed by the piston (1) is formed circumferentially around the sliding shoe (4).
  3. Piston (1) according to one of the preceding claims, characterized in that a sleeve is provided, the sliding shoe (4) being arranged inside the sleeve and the latter delimiting the path of the sliding shoe (4).
  4. Piston (1) according to one of the preceding claims, characterized in that a circlip (7) is provided which prevents the loss of the sliding shoe (4) in the event of separation of the piston (1) and the connecting rod head (8).
  5. Piston (1) according to one of the preceding claims, characterized in that the sliding shoe (4) forms the channel (10) for transferring cooling oil from a connecting rod head into the cavity (11), the force accumulator (5) being designed as a spiral spring and being guided in the radially circumferential channel (12) formed by the piston (1).
EP14731587.3A 2013-06-14 2014-06-13 Slide shoe for a piston for use in internal combustion engines Active EP3008318B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013211215 2013-06-14
PCT/EP2014/062370 WO2014198891A1 (en) 2013-06-14 2014-06-13 Slide shoe for a piston for use in internal combustion engines

Publications (2)

Publication Number Publication Date
EP3008318A1 EP3008318A1 (en) 2016-04-20
EP3008318B1 true EP3008318B1 (en) 2022-11-02

Family

ID=50979743

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14731587.3A Active EP3008318B1 (en) 2013-06-14 2014-06-13 Slide shoe for a piston for use in internal combustion engines

Country Status (5)

Country Link
US (1) US10047694B2 (en)
EP (1) EP3008318B1 (en)
CN (1) CN105283656B (en)
DE (1) DE102014211357A1 (en)
WO (1) WO2014198891A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016202643A1 (en) * 2016-02-22 2017-08-24 Mahle International Gmbh Piston of an internal combustion engine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2369906A (en) * 1941-12-29 1945-02-20 Aluminum Co Of America Engine cooled piston
US2442408A (en) * 1944-09-15 1948-06-01 Specialloid Ltd Piston cooling construction
FR2371581A1 (en) * 1976-11-18 1978-06-16 Nat Res Dev Water cooled IC engine - has reduced cooling passages in cylinder and oil cooled piston
GB2033525A (en) * 1978-10-09 1980-05-21 Ford Motor Co Hydraulic tappet
DE4018252A1 (en) * 1990-06-07 1991-12-12 Man B & W Diesel Ag Oil cooled IC engine - has oil deflection ring to recirculate oil in internal chamber in position

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10022035A1 (en) * 2000-05-05 2001-11-08 Mahle Gmbh Internal combustion engine with built piston; has piston with base and lower part connected by screw having device in head to transfer oil from connecting rod to cooling chamber in piston
CN202970935U (en) * 2012-10-31 2013-06-05 重庆普什机械有限责任公司 Engine piston

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2369906A (en) * 1941-12-29 1945-02-20 Aluminum Co Of America Engine cooled piston
US2442408A (en) * 1944-09-15 1948-06-01 Specialloid Ltd Piston cooling construction
FR2371581A1 (en) * 1976-11-18 1978-06-16 Nat Res Dev Water cooled IC engine - has reduced cooling passages in cylinder and oil cooled piston
GB2033525A (en) * 1978-10-09 1980-05-21 Ford Motor Co Hydraulic tappet
DE4018252A1 (en) * 1990-06-07 1991-12-12 Man B & W Diesel Ag Oil cooled IC engine - has oil deflection ring to recirculate oil in internal chamber in position

Also Published As

Publication number Publication date
CN105283656B (en) 2019-01-15
CN105283656A (en) 2016-01-27
US10047694B2 (en) 2018-08-14
DE102014211357A1 (en) 2014-12-18
EP3008318A1 (en) 2016-04-20
WO2014198891A1 (en) 2014-12-18
US20160146151A1 (en) 2016-05-26

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