EP3094835B1 - Hohle nockenwelle als zentrifugalölfilter - Google Patents

Hohle nockenwelle als zentrifugalölfilter Download PDF

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Publication number
EP3094835B1
EP3094835B1 EP15704041.1A EP15704041A EP3094835B1 EP 3094835 B1 EP3094835 B1 EP 3094835B1 EP 15704041 A EP15704041 A EP 15704041A EP 3094835 B1 EP3094835 B1 EP 3094835B1
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EP
European Patent Office
Prior art keywords
diameter
camshaft
shaft
bore
tube
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EP15704041.1A
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English (en)
French (fr)
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EP3094835A1 (de
Inventor
Frédéric JUSTET
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Renault SAS
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Renault SAS
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M9/00—Lubrication means having pertinent characteristics not provided for in, or of interest apart from, groups F01M1/00 - F01M7/00
    • F01M9/10—Lubrication of valve gear or auxiliaries
    • F01M9/105—Lubrication of valve gear or auxiliaries using distribution conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M9/00—Lubrication means having pertinent characteristics not provided for in, or of interest apart from, groups F01M1/00 - F01M7/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F01L2001/0475—Hollow camshafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2810/00—Arrangements solving specific problems in relation with valve gears
    • F01L2810/02—Lubrication
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
    • F01M2013/0422—Separating oil and gas with a centrifuge device

Definitions

  • the invention relates to a tubular camshaft for a motor vehicle engine, which comprises at least one oil circulation bore of a first determined diameter, supplied with oil at a first end via an orifice. and extending substantially along the length of said shaft, and which comprises a plurality of radial ducts which are distributed along the length of the shaft, which pass through a tubular wall of the shaft, and which put in communication the inside the bore with the outside of the shaft.
  • camshafts of this type are known.
  • Such a camshaft conventionally has no filtration device. To filter the engine oil, it is necessary to filter the oil upstream of the camshaft.
  • the different radial ducts can also be connected to various engine components to allow the lubrication of said members.
  • the oil flow must be ensured by all the radial ducts.
  • the invention proposes an alternative engine oil filtration device that takes advantage of the rotational movement of the camshaft during operation of the engine to filter impurities suspended in the engine oil with the aid of a well-known phenomenon of centrifugation and lubricate engine components connected to different radial ducts.
  • the oil tends to exit through the outlets closest to the feed inlet which may cause a lack of lubrication of the connected components with the outlets farthest from the supply inlet port.
  • the diameters of the outlet orifices are therefore very small, of the order of 0.4 mm and in particular the diameters of the orifices closest to the oil supply orifice, which increases the difficulty of producing a such camshaft. It is then advisable to have diameters of outlet ports that are dependent on each other in order to regulate the evacuation of the oil through all these orifices.
  • the invention proposes a camshaft of the type previously described. forming a centrifugal oil filter and able to discharge oil uniformly through all the discharge orifices, said camshaft being inexpensive in manufacture.
  • the term "uniform evacuation of the oil” means that the device simultaneously allows the passage of oil through all the ports at a time.
  • the document JP2012021437-A proposes a tubular camshaft for a motor vehicle engine, which comprises an oil circulation bore of a first determined diameter, supplied with oil via a feed orifice and extending substantially according to the length of said shaft, and which comprises a plurality of radial ducts which are distributed along the length of the shaft (10), which pass through a tubular wall of the shaft.
  • the invention proposes a camshaft of the type described above, characterized in that the bore is closed at a second end opposite the first end and in that the bore is provided with a retaining means. oil which, during rotation of the shaft (10), allows the uniform discharge of the oil by centrifugation by the radial ducts beyond an oil level threshold.
  • the invention also relates to a method for cleaning a tubular camshaft for a motor vehicle engine having an oil circulation bore of a first determined diameter having at a first end a feed orifice in a preferential manner. coaxial and at a second end a hole closed by a stopper, and a plurality of radial ducts distributed along the length of the shaft which pass through a tubular wall of the shaft and whose ends are arranged in a second diameter smaller than the first diameter , characterized in that it comprises at least a first step during which the plug is removed, a second step during which the interior of the the bore, in particular using compressed air or a solvent and a third step during which the plug is replaced.
  • figure 1 a tubular camshaft 10 for a motor vehicle engine engine made according to a state of the art.
  • the shaft 10 comprises at least one bore 12 of oil circulation of a first diameter "D 12 " determined, which is supplied with oil at a first end 14 of the shaft 10 via a preferably coaxial feed port 16 through which oil is injected 10.
  • the oil flow "H” was represented by arrows on the Figures 1 and 2 .
  • a convergent 17 may be arranged at the inlet of the orifice 16 to channel the flow of oil "H" towards the bore 12.
  • the bore 12 extends substantially along the length of the shaft 10.
  • the shaft 10 comprises a plurality of radial ducts 18 which are distributed along the length of the shaft 10, which pass through a tubular wall 20 of the shaft 10, and which put the interior of the bore 12 into communication with the outside the tree 10.
  • impurities 24 are likely to close the radial ducts 18 if their size is greater than that of said ducts 18, as shown to the left of the figure 1 .
  • a conventional solution is to filter the oil upstream of the camshaft 10, but this solution remains expensive.
  • the invention proposes to take advantage of the rotational movement of the camshaft 10 to provide a camshaft whose oil is filtered by centrifugation.
  • the invention provides a camshaft 10 of the type described above characterized in that the bore 10 is closed at a second end 26 opposite to the first end 14 and in that each radial duct 18 comprises inside the housing. Bore 12 an inlet end 28 which is arranged according to a second diameter "D 28 " smaller than the first diameter "D12", to allow, during the rotation of the shaft 10, to form a weir capable of allowing the evacuation of the oil "H” by centrifugation and impurity retention in the bore 12.
  • the rotation of the shaft 10 makes it possible to subject the impurities 22 to a centrifugal force which plates them against the inner wall 20 of the bore 12.
  • This wall arranged according to the diameter "D 12 " is arranged behind the end 28 of the ducts 18, so that the impurities 24 can not enter the ducts 18.
  • the bore 12 of the shaft 10 fills with oil "H” until the level of the oil film on the inner wall of the bore 12 reaches the diameter "D 28 ".
  • the surplus oil “H” is then discharged through the ducts 18 while the impurities 24 are confined against the inner wall of the bore 12.
  • the diameters of said discharge holes may be independent of one another: the oil "H" surplus beyond the threshold defined by the differences between the diameter of the inner wall of the bore and the second diameter "D28", passes over the inlet end 28 of the ducts to be uniformly discharged and lubricate the organs connected to said ducts. It is not necessary either to opt for very small diameters of the discharge holes, nor to make diameters dependent on one another to regulate the evacuation of the oil.
  • any embodiment of the ducts 18 adapted to provide an end 28 of the ducts 18 arranged according to the diameter "D 28 " may be suitable for the proper implementation of the invention.
  • camshaft 10 could, as illustrated by figure 2 , have a plurality of internal bosses 30 which project inside the bore 12, each having a bore 32 passing through the tubular wall 20 of the shaft to form the ducts 18 and whose inlet end 28 is arranged according to the second diameter "D 28 " less than the first diameter "D 18 ".
  • the camshaft 10 has a plurality of holes 32 which are distributed along the length of the shaft 10, which pass through the tubular wall 10 of the shaft, and which each receive a tube 34 reported whose end of Inlet 28 is arranged in the second diameter "D 28 " smaller than the first diameter "D 18 ".
  • any means for sealing the bore 12 may be suitable for implementing the invention.
  • the bore 12 could be blind.
  • the second end 26 of the camshaft has a bore 36 closed off by a removable plug 38, as shown in FIG. figure 2 .
  • the bore 36 may be merged with the diameter of the bore 12.
  • This configuration makes it possible to determine a method of cleaning such a tubular camshaft 10 in order to eliminate the impurities that would have been deposited therein.
  • this cleaning method comprises at least a first step during which the stopper 38 is removed, a second step during which the interior of the bore 12 is cleaned, and a third step during of which we replace the cap 38.
  • a shaft 10 comprising ducts 18 constituted in part by tubes 34 requires a crimping of the tubes 34 in the holes 32 to ensure that the end 28 of said tubes 34 is well arranged according to the diameter "D 28 ".
  • such a method comprises a first step of introducing an abutment element 40 inside the bore 12, then a second step of introducing the tubes 34 into the bores 32 externally to the camshaft 10 and finally a third crimping step during which the tubes 34 are pushed by a biasing element 42 in the holes 32 until they are pressed against the abutment element 40 to be crimped in the camshaft 10.
  • This tool comprises, as has been seen, a stop element 40 intended to be inserted inside the bore 12 and a biasing element 42 intended to push at least one tube 34 into a corresponding radial bore 32 up to a stop position against the abutment member 40.
  • the biasing member 42 comprises at least one body 44 from which extends a tooth 46 of a cylindrical section of a diameter corresponding to the inside diameter of a tube 34 and of a length greater than that of said tube 34, adapted to allow said tooth 46 to receive a tube 34 and to have a free end 48 projecting out of the tube, as shown more particularly in FIG. figure 6 .
  • the stop element 40 comprises at least one bore 50 of a diameter corresponding to the diameter of the free end of a tooth 46,
  • the biasing element 42 can push the tube 34 into a hole 32 of the cam shaft, then the tooth 46 is in a hole 50 of the abutment member 40 arranged opposite the bore 32.
  • the tube 34 is crimped between the biasing member 42 and the abutment member 40.
  • the tooling could make it possible to carry out in one pass all the crimps of the camshaft 10.
  • the biasing element could comprise a comb comprising as many teeth 46 as the camshaft has holes 32, each tooth 46 being of a cylindrical section with a diameter corresponding to the inside diameter of a tube 34 and of a length greater than that of said tube 34 adapted to allow said tooth 46 to receive a tube 46 and to have a free end 48 projecting from the tube 34.
  • the stop element 40 would then have as many holes 50 as the camshaft 10 has holes 32, each hole 50 being of a diameter corresponding to the diameter of the free end 48 of a tooth 46 of the comb.
  • the comb would be able to simultaneously push all the tubes 34 in the holes 32 of the camshaft 10, then the teeth 48 of the comb would be received in the abutment member 40 and the tubes 34 would be crimped between the comb and the abutment member 40.
  • the invention thus makes it possible to propose a camshaft 10 forming a centrifugal oil filter and a method of simple and economical manufacture of said camshaft 10.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Claims (13)

  1. Rohrförmige Nockenwelle (10) für einen Verbrennungsmotor eines Kraftfahrzeugs, umfassend zumindest eine Ausbohrung (12) zur Zirkulation von Öl mit einem bestimmten ersten Durchmesser (D12), die von einem ersten Ende (14) durch eine Versorgungsöffnung (16) mit Öl (H) versorgt wird und sich im Wesentlichen entlang der Länge der Welle (10) erstreckt, und die mehrere entlang der Länge der Welle (10) verteilte radiale Leitungen (18), die eine rohrförmige Wand (20) der Welle (10) durchsetzen und die das Innere der Ausbohrung (12) mit dem Äußeren der Welle (10) verbinden, dadurch gekennzeichnet, dass die Ausbohrung (12) an einem dem ersten Ende (14) entgegengesetzten zweiten Ende (26) geschlossen ist, und dadurch, dass die Bohrung mit einem Ölrückhaltemittel versehen ist, das bei der Drehung der Welle (10) die gleichmäßige Abfuhr des Öls durch Zentrifugation durch die radialen Leitungen über einen Ölpegelschwellenwert hinaus ermöglicht.
  2. Nockenwelle (10) nach Anspruch 1, dadurch gekennzeichnet, dass das Rückhaltemittel einen Behälter umfasst, der dazu geeignet ist, das Zurückhalten der Verunreinigungen in der Ausbohrung (12) zu ermöglichen.
  3. Nockenwelle (10) nach dem vorangehenden Anspruch, dadurch gekennzeichnet, dass die Ölabfuhröffnungen voneinander unabhängige Durchmesser aufweisen.
  4. Nockenwelle (10) nach dem vorangehenden Anspruch, dadurch gekennzeichnet, dass die Durchmesser der Ölabfuhröffnungen im Bereich von 1 bis 5 mm liegen.
  5. Nockenwelle (10) nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass jede radiale Leitung (18) im Inneren der Ausbohrung (12) ein Eintrittsende (28) umfasst, das entlang eines zweiten Durchmessers (D28), der kleiner als der erste Durchmesser (D12) ist, angeordnet ist, um die Ausbildung eines Auslasses für die Abfuhr des Öls bei Drehung der Welle (10) zu ermöglichen.
  6. Nockenwelle (10) nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Nockenwelle (10) mehrere entlang der Länge der Welle (10) verteilte Bohrungen (32), die die rohrförmige Wand (20) der Welle (10) durchsetzen und die jede ein eingefügtes Rohr (34) aufnehmen, dessen Eintrittsende (28) entlang des zweiten Durchmessers (D28), der kleiner als der erste Durchmesser (D12) ist, angeordnet ist.
  7. Nockenwelle (10) nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Nockenwelle (10) mehrere innere Vorsprünge (30) umfasst, die innerhalb der Ausbohrung (10) vorstehen, die jeder eine Bohrung (32) umfassen, die die rohrförmige Wand (20) der Welle (10) durchsetzen, deren Eintrittsende (28) entlang des zweiten Durchmessers (D28), der kleiner als der erste Durchmesser (D12) ist, angeordnet ist.
  8. Nockenwelle (10) nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass das zweite Ende (26) der Nockenwelle eine Bohrung (36) umfasst, die durch einen abnehmbaren Stopfen (38) verschlossen ist.
  9. Verfahren zur Reinigung einer rohrförmigen Nockenwelle (10) für einen Verbrennungsmotor eines Kraftfahrzeugs, umfassend eine Ausbohrung (12) zur Zirkulation von Öl mit einem bestimmten ersten Durchmesser (D12), die an einem ersten Ende (14) eine koaxiale Versorgungsöffnung (16) und an einem zweiten Ende (26) eine durch einen abnehmbaren Stopfen (38) verschlossene Bohrung (36) umfasst, und mehrere entlang der Länge der Welle (10) verteilte radiale Leitungen (18), die eine rohrförmige Wand (20) der Welle durchsetzen und deren Enden (28) entlang eines zweiten Durchmessers (D28), der kleiner als der erste Durchmesser (D12) ist, angeordnet sind,
    dadurch gekennzeichnet, dass es zumindest einen ersten Schritt, bei dem der Stopfen (38) abgenommen wird, einen zweiten Schritt, bei dem das Innere der Ausbohrung (12) gereinigt wird, insbesondere mittels Druckluft oder eines Lösungsmittels, und einen dritten Schritt, bei dem der Stopfen (38) wieder angebracht wird, umfasst.
  10. Werkzeug zur Fertigung einer rohrförmigen Nockenwelle (10) für einen Verbrennungsmotor eines Kraftfahrzeugs, umfassend eine Ausbohrung (12) zur Zirkulation von Öl mit einem bestimmten ersten Durchmesser (D12), die an einem ersten Ende (14) eine koaxiale Versorgungsöffnung (16) und an einem zweiten Ende (26) eine durch einen Stopfen (38) verschlossene Bohrung (36) umfasst, mehrere entlang der Länge der Welle (10) verteilte radiale Bohrungen (32), die eine rohrförmige Wand (20) der Welle (10) durchsetzen, und mehrere entlang der Länge der Welle (10) verteilte radiale Rohre (34), die in den Bohrungen (32) aufgenommen sind und deren Enden (28) entlang eines zweiten Durchmessers (D28), der kleiner als der erste Durchmesser (D12) ist, angeordnet sind, dadurch gekennzeichnet, dass es Folgendes umfasst:
    - ein Anschlagelement (40), das dafür vorgesehen ist, in das Innere der Ausbohrung (12) eingeführt zu werden,
    - ein Drückelement (42), das dafür vorgesehen ist, zumindest ein Rohr (34) in eine entsprechende radiale Bohrung (32) bis zu einer Anschlagposition gegen das Anschlagelement (40) zu drücken.
  11. Werkzeug nach dem vorangehenden Anspruch, dadurch gekennzeichnet, dass:
    - das Drückelement (42) zumindest einen Körper (44) umfasst, von dem sich ein Zahn (46) mit zylindrischem Querschnitt mit einem Durchmesser, der dem Innendurchmesser eines Rohrs (34) entspricht, und einer Länge, die größer als die des Rohrs (34) ist, erstreckt, der dazu geeignet ist, zu ermöglichen, dass der Zahn (46) ein Rohr (34) aufnimmt und ein freies Ende (48) aufweist, das aus dem Rohr (34) herausragt,
    - das Anschlagelement (40) zumindest eine Bohrung mit einem Durchmesser, der dem Durchmesser des freien Endes eines Zahns (46) entspricht, umfasst,
    wobei das Drückelement (42) dazu geeignet ist, das Rohr (34) in eine Bohrung (32) der Nockenwelle (10) zu drücken, wobei der Zahn (46) dazu geeignet ist, in einer dem Anschlagelement (40) zugewandten Bohrung (50) aufgenommen zu werden, und das Rohr (34) dazu geeignet ist, durch Stauchung zwischen dem Drückelement (42) und dem Anschlagelement (40) festgespannt zu werden.
  12. Werkzeug nach dem vorangehenden Anspruch, dadurch gekennzeichnet, dass:
    - das Drückelement (46) einen Kamm umfasst, der ebenso viele Zähne (46) umfasst, wie die Nockenwelle (10) Bohrungen (32) umfasst, wobei jeder Zahn (42) von zylindrischem Querschnitt ist, mit einem Durchmesser, der einem Innendurchmesser eines Rohrs (34) entspricht, und einer Länge, die größer als die des Rohrs (34) ist, und dazu geeignet ist, zu ermöglichen, dass der Zahn (46) ein Rohr (34) aufnimmt und ein freies Ende (48) umfasst, das aus dem Rohr (34) herausragt,
    - das Anschlagelement (40) ebenso viele Bohrungen (50) umfasst, wie die Nockenwelle (10) Bohrungen (32) umfasst, wobei jede Bohrung (50) einen Durchmesser aufweist, der dem Durchmesser des freien Endes (48) eines Zahns (46) des Kamms entspricht,
    wobei der Kamm dazu geeignet ist, die Rohre (34) in die Bohrungen (32) der Nockenwelle zu drücken, wobei die Zähne (46) des Kamms dazu geeignet sind, im Anschlagelement (40) aufgenommen zu werden, und wobei die Rohre (34) dazu geeignet sind, durch Stauchung zwischen dem Kamm und dem Anschlagelement (40) festgespannt zu werden.
  13. Verfahren zur Fertigung einer rohrförmigen Nockenwelle (10) für einen Verbrennungsmotor eines Kraftfahrzeugs nach den Ansprüchen 1 bis 4, umfassend eine Ausbohrung (12) zur Zirkulation von Öl (H) mit einem bestimmten ersten Durchmesser (D12), die an einem ersten Ende (14) eine koaxiale Versorgungsöffnung (16) und an einem zweiten Ende (26) eine durch einen Stopfen (38) verschlossene Bohrung (36) umfasst, mehrere entlang der Länge der Welle verteilte radiale Bohrungen (32), die eine rohrförmige Wand (20) der Welle durchsetzen, und mehrere entlang der Länge der Welle (10) verteilte radiale Rohre (34), die in den Bohrungen (32) aufgenommen sind und deren Enden (28) mit Hilfe eines Werkzeugs nach einem der Ansprüche 6 bis 7 entlang eines zweiten Durchmessers (D28), der kleiner als der erste Durchmesser (D12) ist, angeordnet werden,
    dadurch gekennzeichnet, dass es Folgendes umfasst:
    - einen ersten Schritt des Einführens eines Anschlagelements (40) in das Innere der Bohrung,
    - einen zweiten Schritt des Einführens der Rohre (34) in die Bohrungen (32) außerhalb der Nockenwelle (10),
    - einen dritten Schritt des Festspannens, bei dem die Rohre (34) durch ein Drückelement (42) in die Bohrungen (34) gedrückt werden, bis sie gegen das Anschlagelement (40) gestaucht werden, um in der Nockenwelle (10) festgespannt zu werden.
EP15704041.1A 2014-01-16 2015-01-13 Hohle nockenwelle als zentrifugalölfilter Active EP3094835B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1450336A FR3016394B1 (fr) 2014-01-16 2014-01-16 "arbre a cames tubulaire formant filtre a huile centrifuge"
PCT/FR2015/050065 WO2015107292A1 (fr) 2014-01-16 2015-01-13 Arbre a cames tubulaire formant filtre a huile centrifuge

Publications (2)

Publication Number Publication Date
EP3094835A1 EP3094835A1 (de) 2016-11-23
EP3094835B1 true EP3094835B1 (de) 2019-08-28

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EP15704041.1A Active EP3094835B1 (de) 2014-01-16 2015-01-13 Hohle nockenwelle als zentrifugalölfilter

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EP (1) EP3094835B1 (de)
FR (1) FR3016394B1 (de)
WO (1) WO2015107292A1 (de)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6073005A (ja) 1983-09-28 1985-04-25 Nippon Piston Ring Co Ltd 潤滑油供給機能を有するカムシヤフト
JPS61175213A (ja) * 1985-01-30 1986-08-06 Honda Motor Co Ltd エンジンにおけるカムケ−スのブリ−ザ装置
JPS62203909A (ja) * 1986-03-01 1987-09-08 Nippon Piston Ring Co Ltd 中空カムシヤフト
DE102007054992B4 (de) * 2007-11-17 2020-12-17 Audi Ag Brennkraftmaschine mit einem Zylinderkopf und mit einem Schmiermittelkreislauf
DE102010019131A1 (de) * 2010-04-30 2011-11-03 Mahle International Gmbh Brennkraftmaschine
JP5703615B2 (ja) * 2010-07-13 2015-04-22 トヨタ自動車株式会社 内燃機関のオイル劣化防止装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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Publication number Publication date
EP3094835A1 (de) 2016-11-23
FR3016394A1 (fr) 2015-07-17
WO2015107292A1 (fr) 2015-07-23
FR3016394B1 (fr) 2016-01-01

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