EP3036419A1 - Ensemble constitué d'un piston et d'une buse de pulvérisation et destiné à un moteur à combustion interne - Google Patents

Ensemble constitué d'un piston et d'une buse de pulvérisation et destiné à un moteur à combustion interne

Info

Publication number
EP3036419A1
EP3036419A1 EP14777501.9A EP14777501A EP3036419A1 EP 3036419 A1 EP3036419 A1 EP 3036419A1 EP 14777501 A EP14777501 A EP 14777501A EP 3036419 A1 EP3036419 A1 EP 3036419A1
Authority
EP
European Patent Office
Prior art keywords
piston
assembly according
cooling channel
beam splitter
cooling oil
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.)
Granted
Application number
EP14777501.9A
Other languages
German (de)
English (en)
Other versions
EP3036419B1 (fr
Inventor
Rainer Scharp
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mahle International GmbH
Original Assignee
Mahle International GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=51655530&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP3036419(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Mahle International GmbH filed Critical Mahle International GmbH
Publication of EP3036419A1 publication Critical patent/EP3036419A1/fr
Application granted granted Critical
Publication of EP3036419B1 publication Critical patent/EP3036419B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P3/06—Arrangements for cooling pistons
    • F01P3/08—Cooling of piston exterior only, e.g. by jets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P3/06—Arrangements for cooling pistons
    • F01P3/10—Cooling by flow of coolant through pistons

Definitions

  • the present invention relates to an assembly of a piston and a Anspritzdüse for cooling oil for an internal combustion engine, wherein the piston has a piston head and a piston skirt, wherein the piston head has a piston bottom with a bottom, a circumferential ring portion and in the region of the ring part a circumferential cooling channel with at least a feed opening for cooling oil, wherein the injection nozzle is provided below the piston skirt,
  • the cooling of the piston takes place by the injection with cooling oil from the piston shaft end in the direction of the at least one feed opening for cooling oil in the cooling channel.
  • the cooling oil penetrates into the cooling channel and causes there in a known per se cooling of the piston, in particular in the region of the piston head.
  • DE 10 2006 056 011 A1 proposes providing two injection nozzles for cooling oil, of which one is the supply of the Cooling channel with cooling oil and the other for cooling the underside of the piston crown is used.
  • the object of the present invention is to further develop a generic piston so that a technically simple and reliable An moussekühlung is achieved.
  • the solution is that the piston on the underside of the piston head adjacent to the at least one feed opening for cooling oil has a beam splitter for cooling oil and that the injection nozzle is arranged below the beam splitter and aligned with the beam splitter.
  • the inventively provided beam splitter causes at least temporarily a portion of the output from the only provided Anspritzdüse cooling oil jet is directed in the direction of the underside of the piston head, while the remaining part enters the cooling channel.
  • the assembly according to the invention thus represents a technically simple solution for reliable Anspritzkühlung.
  • the beam splitter causes during the entire stroke movement in engine operation, a division of the cooling oil jet in a directed towards the cooling channel and a directed to the underside of the piston crown partial beam.
  • a particularly preferred embodiment provides that the central axis of the injection nozzle encloses an acute angle with the central axis of the piston. This oblique position of the injection nozzle causes, in engine operation, when the piston is at the top or bottom dead center, the entire cooling oil jet is passed into the cooling channel, while the division of the cooling oil jet is approximately in the middle region of the stroke.
  • the inventively provided beam splitter thus crosses exactly during each up and down stroke the cooling oil jet and causes the division of the cooling oil jet in each one directed towards the cooling channel and directed to the underside of the piston crown sub-beam.
  • the beam splitter has a substantially V-shaped cross section to form an edge, which is arranged starting from the central axis outwards in the direction of the cooling channel.
  • the inventively provided beam splitter may be integrally formed with the piston head or as a separate, fixedly connected to the piston head component.
  • the beam splitter has a first guide surface and a second guide surface, wherein the first guide surface is assigned to the cooling channel and the second guide surface is assigned to the underside of the piston head. It is particularly advantageous here when the first guide surface steadily merges into an inner wall of the cooling channel and / or the second guide surface continuously into the underside of the piston head. In this way, a particularly reliable cooling of the underside of the piston crown is achieved.
  • the assembly according to the invention can be realized with all piston types, in particular with one-piece piston, piston of two or more interconnected components, box piston, piston with closed cooling channel and piston with downwardly open, closed with a closure element cooling channel, in particular piston with thermally decoupled piston shaft.
  • FIG. 4 shows the piston according to FIG. 1 during a stroke movement according to FIG
  • Figures 1 and 2 show an embodiment of a piston 10 for a structural unit 100 according to the invention.
  • the piston 10 may be a one-piece cast or forged piston or a multi-piece joined 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 one-piece box piston 10 with downwardly open and closed with a separate closure member 18 cooling channel 17 and with a thermally decoupled piston shaft 21st
  • the piston 10 has a piston head 11 with a combustion bowl 14 having a piston head 13, a peripheral land 15 and a peripheral ring portion 16 with annular grooves for receiving piston rings (not shown).
  • a circumferential cooling channel 17 is provided, which is formed open at the bottom and closed with a separate closure element 18, which has at least one feed opening 19 for cooling oil.
  • the piston 10 also has a thermally decoupled piston shaft 21 with piston hubs 22 and hub bores 23 for receiving a piston pin (not shown).
  • the piston bosses 22 are connected in a manner known per se via hub connections to the piston head 11.
  • the piston hubs 22 are connected to each other via running surfaces 24a, 24b.
  • the piston head 13 has in the interior of the piston 10 on an underside 13 a, which is provided according to the invention with a beam splitter 25.
  • the beam splitter 25 is arranged in the vicinity of the at least one feed opening 19 for cooling oil and, in the exemplary embodiment, has a substantially V-shaped cross section.
  • the edge 25a of the beam splitter 25 is aligned, starting from the central axis M of the piston 10, outward in the direction of the cooling channel 17.
  • the beam splitter 25 is formed integrally with the underside 13a of the piston head 13 in the exemplary embodiment and has a first guide surface 26 and a second guide surface 27 for cooling oil.
  • the first guide surface 26 merges substantially continuously into an inner wall 17a of the cooling channel 17.
  • the second guide surface 27 is in the embodiment substantially continuously in the bottom 13 a of the piston head 13 via.
  • FIGS. 3 a to 3 c and 4 show an assembly 100 according to the invention in different stages of engine operation with a piston 10 according to FIGS and 2 and a Anspritzdüse 30 for cooling oil from which a cooling oil jet 31 exits.
  • FIG. 3a illustrates the situation at top dead center
  • FIG. 3c illustrates the situation at bottom dead center
  • FIG. 3b illustrates the situation in a middle stroke position between the top dead center and the bottom dead center.
  • the injection nozzle 30 is fixedly arranged in the crankcase in such a way that it is aligned with the beam splitter 25.
  • the central axis A of the injection nozzle 30 is arranged so that it forms an acute angle ⁇ with the central axis M of the piston 10. This has the consequence that the piston 10 during a complete stroke from top dead center to bottom dead center and vice versa in each case once crosses the cooling oil jet 31.
  • the cooling oil jet 31 In each case at the top and bottom dead center of the cooling oil jet 31 enters directly into the cooling channel 17, wherein it is guided past the beam splitter 25.
  • the cooling oil jet 31 In the respective middle stroke position between the upper and the lower dead center, the cooling oil jet 31 impinges on the beam splitter 25 with the result that, as shown enlarged in FIG.
  • the Anspritzdüse 30 may also be arranged so that its central axis A is aligned parallel to the central axis M of the piston 10, as indicated in Figure 4.
  • the cooling oil jet 31 is divided in each phase of the lifting movement of the piston 10 into two partial beams 31a, 31b, which are respectively directed to the underside 13a of the piston head 13 and into the cooling channel 17.

Landscapes

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

Abstract

L'invention concerne un ensemble (100) constitué d'un piston (10) et d'une buse de pulvérisation (30) d'huile de refroidissement d'un moteur à combustion interne. Le piston comporte une tête de piston (11) et une tige de piston (21). La tête de piston (11) comporte un fond de piston (13) pourvu d'une face inférieure (13a), une partie annulaire périphérique (16) ainsi qu'un canal de refroidissement périphérique (17) à proximité de la partie annulaire (16), lequel est muni d'au moins une ouverture d'alimentation (19) en huile de refroidissement, la buse de pulvérisation (30) étant placée sous la tige de piston (21). Selon l'invention, le piston (10) comporte, au niveau de la face inférieure (13a) du fond de piston (13), un diviseur (25) du jet d'huile de refroidissement de manière adjacente à la ou aux ouvertures d'alimentation (19) en huile de refroidissement. La buse de pulvérisation (30) est agencée sous le diviseur de jet (25) et est orientée vers le diviseur de jet (25).
EP14777501.9A 2013-08-23 2014-08-22 Ensemble constitué d'un piston et d'une buse de pulvérisation et destiné à un moteur à combustion interne Not-in-force EP3036419B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201310013962 DE102013013962A1 (de) 2013-08-23 2013-08-23 Baueinheit aus einem Kolben und einer Anspritzdüse für einen Verbrennungsmotor
PCT/DE2014/000421 WO2015024551A1 (fr) 2013-08-23 2014-08-22 Ensemble constitué d'un piston et d'une buse de pulvérisation et destiné à un moteur à combustion interne

Publications (2)

Publication Number Publication Date
EP3036419A1 true EP3036419A1 (fr) 2016-06-29
EP3036419B1 EP3036419B1 (fr) 2018-04-11

Family

ID=51655530

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14777501.9A Not-in-force EP3036419B1 (fr) 2013-08-23 2014-08-22 Ensemble constitué d'un piston et d'une buse de pulvérisation et destiné à un moteur à combustion interne

Country Status (6)

Country Link
US (1) US9951715B2 (fr)
EP (1) EP3036419B1 (fr)
JP (1) JP6386048B2 (fr)
CN (1) CN105579682B (fr)
DE (1) DE102013013962A1 (fr)
WO (1) WO2015024551A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3108133A1 (fr) * 2014-02-21 2016-12-28 KS Kolbenschmidt GmbH Piston comportant un espace de refroidissement pourvu de faces de guidage d'huile appropriées à l'écoulement comportant et procédé de refroidissement de ce piston
DE102020000381A1 (de) 2020-01-23 2021-07-29 Daimler Ag Kolben für eine Hubkolbenmaschine eines Kraftfahrzeugs, insbesondere elnes Kraftwagens

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3018552B1 (fr) * 2014-03-14 2019-07-05 IFP Energies Nouvelles Moteur a combustion a injection directe de combustible a allumage par compression comprenant des moyens de refroidissement du piston.
DE102014005364A1 (de) 2014-04-11 2015-10-29 Mahle International Gmbh Baueinheit aus einem Kolben und einer Ölspritzdüse für einen Verbrennungsmotor
DE102014010528A1 (de) 2014-07-18 2016-02-18 Mahle International Gmbh Pleuel sowie Baueinheit aus einem Kolben und einem Pleuel
DE102016223530A1 (de) * 2016-11-28 2018-05-30 Federal-Mogul Nürnberg GmbH Stahlkolben für einen Verbrennungsmotor
JP2019052604A (ja) * 2017-09-15 2019-04-04 スズキ株式会社 内燃機関
DE102018220193A1 (de) 2018-11-23 2020-05-28 Mahle International Gmbh Ölzuführelement und Kolben einer Brennkraftmaschine
DE102020210907A1 (de) 2020-08-28 2022-03-03 Mahle International Gmbh Kolben für eine Brennkraftmaschine
DE102020006344A1 (de) 2020-10-15 2022-04-21 Daimler Ag Gekühlter Kolben für eine Verbrennungskraftmaschine
CH718247A1 (de) * 2021-01-11 2022-07-15 Liebherr Machines Bulle Sa Brennkraftmaschine mit Düsenanordnung zur Kühlung und Schmierung der Kolben-Pleuel-Baugruppe.

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3108133A1 (fr) * 2014-02-21 2016-12-28 KS Kolbenschmidt GmbH Piston comportant un espace de refroidissement pourvu de faces de guidage d'huile appropriées à l'écoulement comportant et procédé de refroidissement de ce piston
DE102020000381A1 (de) 2020-01-23 2021-07-29 Daimler Ag Kolben für eine Hubkolbenmaschine eines Kraftfahrzeugs, insbesondere elnes Kraftwagens

Also Published As

Publication number Publication date
US20160208734A1 (en) 2016-07-21
DE102013013962A1 (de) 2015-02-26
JP2016532814A (ja) 2016-10-20
US9951715B2 (en) 2018-04-24
JP6386048B2 (ja) 2018-09-05
CN105579682A (zh) 2016-05-11
CN105579682B (zh) 2018-07-03
WO2015024551A1 (fr) 2015-02-26
EP3036419B1 (fr) 2018-04-11

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