EP2705238B1 - Procédé de fabrication d'un piston à canal de refroidissement et piston associé - Google Patents

Procédé de fabrication d'un piston à canal de refroidissement et piston associé Download PDF

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Publication number
EP2705238B1
EP2705238B1 EP12718654.2A EP12718654A EP2705238B1 EP 2705238 B1 EP2705238 B1 EP 2705238B1 EP 12718654 A EP12718654 A EP 12718654A EP 2705238 B1 EP2705238 B1 EP 2705238B1
Authority
EP
European Patent Office
Prior art keywords
piston
ring
cooling channel
coolant
aperture
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.)
Not-in-force
Application number
EP12718654.2A
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German (de)
English (en)
Other versions
EP2705238A1 (fr
Inventor
Matthias Laqua
Volker Lehnert
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.)
KS Kolbenschmidt GmbH
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KS Kolbenschmidt GmbH
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Publication date
Application filed by KS Kolbenschmidt GmbH filed Critical KS Kolbenschmidt GmbH
Publication of EP2705238A1 publication Critical patent/EP2705238A1/fr
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Publication of EP2705238B1 publication Critical patent/EP2705238B1/fr
Not-in-force legal-status Critical Current
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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
    • F02F3/0023—Multi-part pistons the parts being bolted or screwed together
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/49274—Piston ring or piston packing making

Definitions

  • the invention relates to a method for producing a cooling channel piston for an internal combustion engine, comprising a piston upper part and a piston lower part, wherein the piston upper part is releasably connected to the lower piston part and forms a cooling channel in the region between piston upper part and piston lower part, the at least one inlet opening with coolant Operation of the cooling channel piston is acted upon and flows out of the at least one drain port coolant.
  • the invention further relates to a cooling channel piston for an internal combustion engine, comprising a piston upper part and a piston lower part, wherein the piston upper part and the piston lower part are detachably connected to each other and in the region between the piston upper part and piston lower part, a cooling channel is formed, wherein the cooling channel at least one inlet opening for the Beauftschung of coolant and at least one drain opening for the discharge of coolant has.
  • Cooling oil used for shaker cooling can be introduced into one of the two piston cooling chambers via at least one feed channel, can be transferred from the latter via the passage channels into the other piston cooling chamber and can be diverted out of it via at least one discharge bore. Furthermore, at least the outer piston cooling chamber has drilled blind holes as an extension.
  • a disadvantage of the known from this prior art piston with cooling channel is that they are cooled exclusively by means of the shaker effect. Furthermore, during the operation of the cooling channel piston in an internal combustion engine, oil carbon builds up on the surface of the cooling channel. Furthermore, the piston can not be selectively cooled by means of coolant at locations, in particular high-temperature stressed areas.
  • the WO 2011/012273 A1 discloses a method of cooling a piston of an internal combustion engine, wherein a piston crown exposed to at least one jet is cooled by sprayed oil, the oil from a pressure chamber passing through at least one aperture of a separator positioned in a cooling passage of the piston thereby forms in the cooling channel the oil-filled pressure space between a part of the wall of the cooling channel and the separating element, is selectively sprayed onto at least a portion of the underside of the piston crown by generated pressure.
  • the oil is sprayed continuously targeted to the region of the underside of the piston crown, which is opposite to the region of the piston crown, which is not directly exposed to the combustion jet.
  • a sleeve used between to be fastened ring and lower piston part is not known in the prior art.
  • a ring which consists of two parts, namely a ring base and a ring top, wherein the ring base is secured with the inlet opening, that in the inlet opening a thread is cut and then the ring base is fastened by means of a fastening screw with the inlet opening, and the ring top is secured to the ring base so that the ring upper part is screwed by means of at least one fastening screw with the ring base, the prior art does not disclose.
  • the object of the invention is therefore to provide a piston which avoids the above-mentioned disadvantages and which is simple and inexpensive to produce.
  • the upper piston part and the lower piston part are preferably connected to one another by means of at least one screw connection, preferably by means of at least one stud bolt and by means of at least one nut. This makes it possible that the piston upper part is separable from the piston lower part.
  • the upper piston part can be manufactured separately from the lower piston part. Alternatively, the piston upper part can be produced together with the lower piston part.
  • At least one sleeve is inserted in the region between the ring to be fastened and the piston lower part. This makes it possible that the ejection opening has a sufficient distance to the inside of the cooling channel.
  • the sleeve by means of the sleeve, a sufficient distance between the piston crown inner side, which is located in the cooling passage with respect to the outside of the piston upper part in the interior of the piston, and ejection opening can be ensured.
  • the ring is attached to the inlet opening in such a way that a thread is cut into the inlet opening and then the ring is fastened by means of a fastening screw, preferably by means of a hollow screw, with the inlet opening.
  • a fastening screw preferably by means of a hollow screw, with the inlet opening.
  • a thread is cut only in some of the inlet openings.
  • a single fastening screw is inserted into the threaded inlet openings.
  • the ring is inserted between the inlet opening and the fixing screw.
  • the ring preferably has a shape, by means of which the ring during fitting and after attaching the fastening screw with the inlet opening is positioned appropriately on a region of the cooling channel surface.
  • a hollow screw is used as a fastening screw, which also allows the passage of coolant through itself in addition to the function of a mounting screw, so that further coolant flows through the inlet opening during operation of the piston in an internal combustion engine.
  • a pressure chamber is preferably designed between annular upper part and annular lower part, from which coolant can spray via at least one ejection opening.
  • no gap between the cooling channel and ring may be present, so that the two areas are not directly connected to each other.
  • a pressure space to be formed between the ring and a region of the cooling channel by supplying coolant through the inlet opening into the region formed between the cooling channel and the ring under pressure.
  • the coolant under pressure from the pressure chamber formed by the coolant from at least one ejection opening of the ring in the direction of the inner wall of the cooling channel, preferably the cooling channel wall at the piston top, is ejected.
  • the ring consists of two parts, namely a ring base and a ring top, wherein the ring base is attached to the inlet opening and the ring top is attached to the ring base.
  • the annular upper part preferably has at least one ejection opening.
  • the ring base is fastened with the inlet opening in such a way that a thread is cut into the inlet opening and then the ring base is fastened by means of a fastening screw, preferably by means of a hollow screw, with the inlet opening, and that the ring upper part is secured with the ring base, that the ring upper part by means of at least one fastening screw, preferably by means of at least one countersunk screw, is bolted to the ring base.
  • the cooling channel piston according to the invention for an internal combustion engine is produced according to the method according to the invention or one of its preferred embodiments.
  • the ring consists of steel, aluminum, an aluminum alloy and / or a hard rubber. This makes it possible that the ring, the weight of the cooling channel piston is not significantly changed and next easy and inexpensive to produce. Furthermore, it is possible by the hard rubber, that the ring optimally adapts to the contour of the cooling channel.
  • the ring has at least one ejection opening, preferably at least one nozzle-shaped opening.
  • the nozzle-shaped opening can be formed for example as a spray nozzle, for example in the form of a Venturi nozzle.
  • the ejection opening is formed as a simple bore.
  • the ring consists of two parts, wherein from the at least one ejection opening of the annular upper part coolant is ejected under pressure. Between the ring base and ring upper part while a pressure chamber is formed by a pressure is built up continuously. This pressure has been generated by means of the coolant flowing through the inlet opening, wherein the coolant is pumped under pressure into the pressure space. From the one ejection opening of the ring then exits the coolant with a certain pressure and flow and flows in each one aligned by the orientation of the ejection opening portion of the inside of the cooling channel.
  • a pressurized coolant jet is generated from the respective ejection opening.
  • the outflowing coolant jet is further amplified by the shaker movement of the coolant generated by the stroke movement of the piston, in particular during a movement in the direction of the connecting rod, that is to say during a downward movement of the piston in the internal combustion engine, to an intensification of the coolant jet comes.
  • the inertia of the coolant causes the coolant in the piston to move due to the movement of the piston.
  • ejected from the ring coolant is moved in the cooling channel itself due to the shaker effect.
  • the coolant exits the ejection opening of the ring continuously and independently of the movement of the cooling channel piston in the internal combustion engine.
  • the cooling channel in the region between piston upper part and piston lower part can be round, elliptical, rectangular, square and / or the like.
  • the cooling channel can be completely circumferential around the stroke axis of the piston.
  • the cooling channel may be interrupted in its circulation about the stroke axis of the piston, wherein at least one non-circumferential ring section is used for the respectively interrupted cooling channel regions in the case of an interrupted cooling channel.
  • FIG. 1 is a simplified section of a cooling channel piston 1 for an internal combustion engine shown in section.
  • the cooling channel piston 1 consists of a piston upper part 2 and a lower piston part 3.
  • the upper piston part 2 is detachably connected to the lower piston part 3, in which the upper piston part 2 and the lower piston part 3 by means of at least one not in FIG. 1 shown stud bolt 16 and by means of at least one not in FIG. 1 shown nut 17 are connected together.
  • the upper piston part 2 and the lower piston part 3 are connected to each other by means of four stud bolts 16 and four nuts 17, which are each arranged symmetrically in the cooling channel piston 1. The distance between the directly adjacent nuts 17 and stud 16 is the same.
  • FIG. 1 is formed in the region between piston upper part 2 and lower piston part 3, a cooling channel 4.
  • the cooling channel 4 is completely circumferential around the central axis of the cooling channel piston 1 radially.
  • the center axis of the cooling channel piston 1 corresponds to the stroke axis of the cooling channel piston 1, which passes through the cooling channel piston 1 during operation in an internal combustion engine.
  • the lower piston part 3 furthermore has at least one inlet opening 5 and a pin bore 6 passing through the lower piston part 3.
  • the lower piston part 3 has four inlet openings 5 for the admission of coolant, one of which by way of example in FIG FIG. 1 is shown.
  • the piston upper part 2 further comprises according to FIG. 1 a ring field 7 with grooves for piston rings, not shown, and a combustion bowl 8.
  • the cooling channel 4 is acted upon by coolant during operation of the cooling channel piston 1 in an internal combustion engine.
  • the coolant for cooling the cooling channel piston 1 in the exemplary embodiment is fed via the pin bore 6 into the respective inlet opening 5.
  • cooling channel 4 flows over at least one not in FIG. 1 illustrated drain opening 14, the inflowed and the cooling channel 4 heated coolant again.
  • FIGS 2 and 3 show a cooling channel piston 1 'for an internal combustion engine with a retrofitted to the cooling channel piston 1 ring 9th
  • FIG. 2 is the fully manufactured cooling channel piston 1 'in the direction of pin bore 6 and in FIG. 3 perpendicular to the pin bore 6 each shown in side view in section.
  • FIG. 4 is the top view of the not connected to the piston upper part 2 piston lower part 3 for the cooling channel piston 1 'shown.
  • the FIGS. 5 to 7 such as FIG. 10 and FIG. 11 each show components of the retrofitted cooling channel piston 1 '.
  • the FIG. 8 and the FIG. 9 each show a section of the ring top 10o in section at different positions.
  • the FIG. 12 shows a section of the cooling channel piston 1 'in section in the region of an inlet opening 5.
  • FIGS. 13 and 14 each show a section of a ring base 10u in section at different positions. Same components are in the FIGS. 2 to 14 provided with the same reference numerals and new components are in the FIGS. 2 to 14 provided with new reference numbers.
  • cooling channel piston 1 ' was prepared by the method of the invention, so that the cooling channel piston 1' opposite to the cooling channel piston 1 according to FIG. 1 different in some features.
  • FIG. 3 one of the four studs 16 for connecting piston upper part 2 and lower piston part 3 is shown, to which a nut 17 in the finished manufactured cooling channel piston 1 'is tightened.
  • FIG. 4 the symmetrical distance of the four holes 18 for the four studs 16 of the cooling channel piston 1 'is shown.
  • FIG. 2 a drain opening 14 for the coolant exemplified in section.
  • the cooling channel piston 1 'does not differ from that in FIG FIG. 1 shown cooling channel piston 1.
  • the cooling channel piston 1 ' has a ring lower part 10u arranged in the cooling channel 4 relative to the cooling channel piston 1 and a separate ring upper part 10o according to FIG FIG. 2 and FIG. 3 on.
  • the ring bottom 10u and the ring top 10o are made in the embodiment of aluminum.
  • the ring lower part 10u and the ring upper part 10o form the ring 9 assembled.
  • the ring bottom part 10u and the ring top part 10o are each in the form of separate individual parts according to FIGS FIGS. 10 and 11 educated.
  • the annular upper part 10o and the annular lower part 10u are also circumferentially aligned circumferentially around the contour of the cooling channel 4c.
  • the ring base 10u is fixedly connected by means of four fastening screws in the form of four hollow screws 11 with the lower piston part 3 by the four hollow screws 11 are respectively screwed into an inlet opening 5.
  • the four inlet openings 5 each have a matching thread 12 for a hollow screw 11.
  • the inlet openings 5 each have a M14 thread.
  • An inlet opening 5 in the lower piston part 3 with M14 thread 12 is in FIG. 12 exemplified.
  • FIG. 2 For example, a hollow screw 11 is shown after installation in the cooling channel piston 1 '.
  • FIG. 5 For example, a hollow screw 11 is shown as a single component.
  • the ring upper part 10o is connected in the embodiment with the ring base 10u by means of eight countersunk screws 13.
  • the annular lower part 9 eight for the countersunk screws 13 matching threaded holes 23 and the upper ring part 10o eight holes 21 for the countersunk screws 13 through which a countersunk screw 13 is inserted.
  • countersunk screws 13 in the M5x50 design are used.
  • FIG. 6 shows in detail the eight threaded holes 23 for one countersunk screw 13 and their arrangement in the ring base 10u. In FIG. 6 are further shown in detail four holes 22 for each hollow screw 11. In FIG. 13 By way of example, a hole 22 is shown in the annular lower part 10u shown as a section.
  • FIG. 14 By way of example, a threaded bore 23 with M5 thread is shown in the annular lower part 10u shown as a section.
  • FIG. 7 are the eight holes 21 for the countersunk screws 13 and their arrangement in the ring upper part 10o shown in detail.
  • the threaded holes 23 and the holes 22 are distributed symmetrically in the ring base 10u. Further, the holes 21 are symmetrical according to FIG. 7 arranged in the ring upper part 10o.
  • a countersunk screw 13 exemplified, which is firmly connected by means of a threaded hole 23 shown with the ring base 10u and is inserted through the hole 21 of the annular upper part 10o.
  • the ring upper part 10o furthermore has twenty-four ejection openings 19, which are symmetrical according to FIG. 7 are arranged to each other.
  • the distance between the respectively adjacent ejection openings 19 is in accordance with FIG. 7 equal to each other.
  • FIG. 8 shows a section of the ring top 10o in section. This view corresponds to the section A in FIG. 2 , In FIG. 8 one of the eight holes 21 for the respective countersunk screw 13 is shown in detail. In FIG. 8 is further shown in detail a pressure chamber 20 of the annular upper part 10o in the form of a hollow. In the embodiment, the pressure chamber 20 is completely radially around the central axis of the cooling channel piston 1 'in the annular upper part 10o encircling.
  • FIG. 9 is a section of the ring top 10o shown in section.
  • the view of the ring top 10o according to FIG. 9 corresponds to the detail B of the ring top 10o according to FIG. 3 ,
  • an ejection opening 19 of the annular upper part 10o is shown.
  • the ejection openings 19 according to FIG. 9 in each case a nozzle-shaped opening in the form of a spray nozzle.
  • the circumferential pressure chamber 20 of the annular upper part 10o shown.
  • a sleeve 15 is arranged in each case, which is in each case inserted into an inlet opening 5.
  • a hollow screw 11 is inserted through the sleeve 15 therethrough.
  • FIGS. 10 and 11 each show the sleeve 15 as a single component, wherein according to FIG. 10 the sleeve 15 in side view and according to FIG. 11 the sleeve 15 in the direction of the central axis, that is, in plan view, is shown.
  • FIG. 2 shows an assembled sleeve 15 by way of example in the cooling channel piston 1 '.
  • the piston upper part 2 of the piston lower part 3 in the in FIG. 1 solved cooling channel piston 1 solved.
  • the four nuts 17 are released, wherein in each case a nut 17 is connected to a stud bolt 16 before loosening. Subsequently, the four studs 16 are dissolved in the piston upper part 2.
  • the upper piston part 2 is easily separable from the lower piston part 3, so that after the separation of piston upper part 2 and lower piston part 3 two separate components, namely the upper piston part 2 and the lower piston part 3, are present.
  • the two-part ring 9 is present as a retrofit kit together with at least matching sleeves 15 and mounting screws in the form of countersunk screws 13 and hollow screws 11 as a package for mounting in the cooling channel piston 1 here.
  • a thread 12 is cut into the four inlet openings 5 of the piston lower part 3 in each case.
  • a thread 12 having the dimension M14 is cut into the respective inlet opening 5.
  • the four threads 12 are each cleaned.
  • the cut threads 12 are in FIG. 4 shown.
  • one of the four sleeves 15 is inserted into one of the four inlet openings 5.
  • the annular lower part 10u is fastened with the four inlet openings 5, in which the annular lower part 10u is fastened by means of the four hollow screws 11 with the four inlet openings 5 of the piston lower part 3.
  • a hollow screw 11 is inserted through a respective sleeve 15 prior to attachment in the respective inlet opening 5.
  • the ring base 10u to be fastened is in FIG. 6 shown.
  • a hollow screw 11 is screwed into an inlet opening 5 in each case.
  • the hollow screw 11 to be fastened in each case is inserted through a sleeve 15.
  • an adhesive is additionally introduced in each case on the thread 12 of the inlet openings 5 prior to screwing, which provides for its permanent hardening for a non-detachable connection of respective hollow screw 11 and inlet opening 5.
  • the ring upper part 10o is then fastened to the ring base 10u.
  • the annular upper part 10o is placed on the annular lower part 10u.
  • the Figures 2 . 3 . 6 . 13 and 14 are respectively grooves 24, 25 shown in the ring base 10u, in which the ring top 10o simple and pasend according to FIG. 2 and FIG. 3 can be used.
  • the four stud bolts 16 are screwed back into the piston upper part 2. Subsequently, the upper piston part 2 and the lower piston part 3 are connected to each other again by means of the nuts 17 and the stud 16 by one of the four nuts 17 is screwed to a stud bolt 16 respectively.
  • cooling channel piston 1 When operating in the Figures 2 and 3 shown cooling channel piston 1 'in an internal combustion engine is continuously coolant, such as cooling oil, pumped from the pin bore 6 into the four inlet openings 5.
  • the inlet openings 5 thus continue to function in addition to the function of attaching the ring 9 to pressurize the cooling channel 4 with coolant.
  • the supplied under pressure into the four inlet openings 5 coolant is then further pumped through the respective hollow screw 11 of the inlet openings 5 in the pressure chamber 20, so that in the pressure chamber 20, a pressure builds up continuously.
  • the pressure chamber 20 is completely filled during operation continuously with coolant under pressure.
  • the pressure chamber 20 is located according to FIG. 2 within the cooling channel 4, wherein the pressure chamber 20 itself is formed between ring upper part 10 o and ring bottom 10 b.
  • coolant By located in the pressure chamber 20 under pressure coolant is injected independently of the movement of the cooling channel piston 1 'in the internal combustion engine continuously from the twenty-four ejection openings 19 in the cooling channel 4 coolant.
  • the coolant exits continuously under a certain pressure and flow from the respective ejection openings 19, wherein the shaker effect in the embodiment has no negative impact on the ejection of the coolant from the pressure chamber 20 in the direction of the surface of the cooling channel 4.
  • the diameter of the ejection openings 19 and the number of the ejection opening 19 are coordinated with one another such that optimum cooling of the cooling channel piston 1 'is ensured.
  • a targeted cooling of the inside of the cooling channel 4 is possible, whereby in particular the upper piston part 2 and the area below the combustion bowl 8 can be cooled particularly well.
  • the coolant ejection jet from the respective ejection port 19 a new oil carbon buildup on the inside of the cooling passage 4 is prevented in the operation of the cooling passage piston 1 'in an internal combustion engine.
  • the coolant ejected from the ejection openings 19 and heated in the cooling channel then flows out of the cooling channel 4 again via the outlet openings 14.

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  • 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)

Claims (5)

  1. Procédé de fabrication d'un piston à canal de refroidissement (1') pour un moteur à combustion interne, constitué d'une partie supérieure de piston (2) et d'une partie inférieure de piston (3), la partie supérieure de piston (2) étant connectée de manière amovible à la partie inférieure de piston (3) et un canal de refroidissement (4) étant formé dans la région entre la partie supérieure de piston (2) et la partie inférieure de piston (3), lequel est sollicité par le biais d'au moins une ouverture d'alimentation (5) avec du fluide de refroidissement pendant le fonctionnement du piston à canal de refroidissement (1, 1') et hors duquel le fluide de refroidissement ressort à nouveau par le biais d'au moins une ouverture d'écoulement (14), la partie supérieure de piston (2), dans une première étape de procédé, étant desserrée de la partie inférieure de piston (3), de telle sorte que la partie supérieure de piston (2) soit séparée de la partie inférieure de piston (3), et ensuite une bague (9) présentant au moins une ouverture d'éjection (19), de préférence au moins une ouverture en forme de buse, étant fixée à l'ouverture d'alimentation (5), et ensuite la partie supérieure de piston (2) et la partie inférieure de piston (3) étant connectées à nouveau l'une à l'autre, le canal de refroidissement (4) pouvant être en outre sollicité avec du fluide de refroidissement par le biais de l'ouverture d'alimentation (5), caractérisé en ce qu'après la séparation et avant la fixation au moins une douille (15) est insérée dans la région entre la bague à fixer (9) et la partie inférieure de piston (3), la bague (9) se composant de deux parties, à savoir une partie inférieure de bague (10u) et une partie supérieure de bague (10o), la partie inférieure de bague (10u) étant fixée à l'ouverture d'alimentation (5) de telle sorte qu'un filetage (12) soit coupé dans l'ouverture d'alimentation (5) et qu'ensuite la partie inférieure de bague (10u) soit fixée à l'ouverture d'alimentation (5) au moyen d'une vis de fixation, de préférence au moyen d'une vis creuse (11), et en ce que la partie supérieure de bague (10o) est fixée à la partie inférieure de bague (10u) de telle sorte que la partie supérieure de bague (10o) soit vissée à la partie inférieure de bague (10u) au moyen d'au moins une vis de fixation, de préférence au moyen d'au moins une vis à six pans creux (13).
  2. Procédé selon la revendication 1, caractérisé en ce que la partie supérieure de piston (2) et la partie inférieure de piston (3) sont connectées l'une à l'autre au moyen d'au moins une connexion vissée, de préférence au moyen d'au moins un goujon fileté (16) et au moyen d'au moins un écrou (17).
  3. Piston à canal de refroidissement (1') pour un moteur à combustion interne, constitué d'une partie supérieure de piston (2) et d'une partie inférieure de piston (3), la partie supérieure de piston (2) et la partie inférieure de piston (3) étant connectées l'une à l'autre de manière amovible et un canal de refroidissement (4) étant formé dans la région entre la partie supérieure de piston (2) et la partie inférieure de piston (3), le canal de refroidissement (4) présentant au moins une ouverture d'alimentation (5) pour la sollicitation avec du fluide de refroidissement et au moins une ouverture d'écoulement (14) pour l'écoulement de fluide de refroidissement, caractérisé en ce que le piston à canal de refroidissement (1') est fabriqué selon l'une quelconque des revendications 1 à 2.
  4. Piston à canal de refroidissement (1') selon la revendication 3, caractérisé en ce que la bague (9) se compose d'acier, d'aluminium, d'un alliage d'aluminium et/ou d'un caoutchouc dur.
  5. Piston à canal de refroidissement (1') selon la revendication 3 ou 4, caractérisé en ce que la bague (9) présente au moins une ouverture d'éjection (19), de préférence au moins une ouverture en forme de buse.
EP12718654.2A 2011-05-04 2012-05-03 Procédé de fabrication d'un piston à canal de refroidissement et piston associé Not-in-force EP2705238B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011100470A DE102011100470A1 (de) 2011-05-04 2011-05-04 Verfahren zur Herstellung eines Kühlkanalkolbens und zugehöriger Kolben
PCT/EP2012/058082 WO2012150288A1 (fr) 2011-05-04 2012-05-03 Procédé de fabrication d'un piston à canal de refroidissement et piston associé

Publications (2)

Publication Number Publication Date
EP2705238A1 EP2705238A1 (fr) 2014-03-12
EP2705238B1 true EP2705238B1 (fr) 2015-09-09

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EP12718654.2A Not-in-force EP2705238B1 (fr) 2011-05-04 2012-05-03 Procédé de fabrication d'un piston à canal de refroidissement et piston associé

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US (1) US20140238332A1 (fr)
EP (1) EP2705238B1 (fr)
DE (1) DE102011100470A1 (fr)
WO (1) WO2012150288A1 (fr)

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US10774781B2 (en) 2017-01-25 2020-09-15 Tenneco, Inc. Piston with anti-coking design features
CN111512036A (zh) 2017-11-14 2020-08-07 Ks科尔本施密特有限公司 优化设计的钢制活塞
JP2023034846A (ja) * 2021-08-31 2023-03-13 マツダ株式会社 エンジンのピストン構造
CN114645798B (zh) * 2022-03-14 2023-02-28 北京理工大学 一种活塞销孔衬套结构

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EP2705238A1 (fr) 2014-03-12
DE102011100470A1 (de) 2012-11-08
WO2012150288A1 (fr) 2012-11-08
US20140238332A1 (en) 2014-08-28

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