FI126963B - Piston of internal combustion engine - Google Patents

Piston of internal combustion engine Download PDF

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Publication number
FI126963B
FI126963B FI20145121A FI20145121A FI126963B FI 126963 B FI126963 B FI 126963B FI 20145121 A FI20145121 A FI 20145121A FI 20145121 A FI20145121 A FI 20145121A FI 126963 B FI126963 B FI 126963B
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FI
Finland
Prior art keywords
piston
cooling oil
guide sleeve
oil guide
connecting rod
Prior art date
Application number
FI20145121A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI20145121A (en
Inventor
Talat Shaer
Hubert Pelzel
Original Assignee
Man Diesel & Turbo Se
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Publication of FI20145121A publication Critical patent/FI20145121A/en
Application granted granted Critical
Publication of FI126963B publication Critical patent/FI126963B/en

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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
    • 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

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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)

Description

Piston ofan internal combustion engine
The invention relates to a piston of an internal combustion engine according to the preamble of Claim 1.
From DE 35 18 721 C2 a piston ofan internal combustion engine is known, which comprises a piston upper part and a piston lower part, which are preferentially screwed together. In the piston lower part, a piston pin is mounted, wherein the piston pin serves for connecting the piston to a connecting rod of the internal combustion engine. The piston according to DE 35 18 721 C2 is oil-cooled, wherein between the piston upper part and the piston lower part on the one hand an inner cooling space for cooling oil and on the other hand an outer cooling space for cooling oil is formed, and wherein the inner cooling space is connected to the outer cooling space via at least one transfer bore. In order to introduce cooling oil into the inner cooling space, a feed bore for cooling oil is integrated in the connecting rod according to this prior art, wherein the cooling oil starting out from the connecting rod can be transferred into the inner cooling space with the help of a multi-part cooling oil guide sleeve. According to DE 35 18 721 C2, a first, necklike part of the cooling oil guide sleeve is immovably fastened in the piston lower part of the piston. A funnel-like, moveable part of the cooling oil guide sleeve interacts with this locationally fixed, neck-like part of the cooling oil guide sleeve in such a manner that a spring element, which acts between the two parts of the cooling oil guide sleeve, resiliently presses the funnel-like part of said cooling oil guide sleeve against a connecting rod head of the connecting rod in a sliding contact. The use of such spring-loaded cooling oil guide sleeves for transferring the cooling oil starting out from the bore in the connecting rod into the inner cooling space is disadvantageous, since the assembly of such cooling oil guide sleeves involves a relatively major effort. In addition, the separate spring elements cause high friction forces between the cooling oil guide sleeve and the connecting rod.
Starting out from this, the present invention is based on the object of creating a new type of piston of an internal combustion engine. This object is solved through a piston according to Claim 1. According to the invention, the cooling oil guide sleeve is formed as a slit sleeve, which with a first guiding surface spring-elastically presses against a support surface of the piston lower part.
The cooling oil guide sleeve of the piston formed as a slit sleeve is not only unitary, but presses spring-elastically against the piston lower part, as a result of which a separate spring element, which is required according to the prior art, can be omitted. The piston according to the invention accordingly manages with a lower number of components in the region of the cooling oil guide sleeve. By being able to omit a separate spring element for pressing the cooling oil guide sleeve against the connecting rod, friction forces between the cooling oil guide sleeve and the connecting rod can be additionally reduced.
According to an advantageous further development of the invention, the first guiding surface of the cooling oil guide sleeve and the support surface of the piston lower part, against which the first guiding surface of the cooling oil guide sleeve presses in a spring-elastic manner, is contoured in the manner of a truncated cone, so that the cooling oil guide sleeve furthermore spring-elastically presses against a support surface of a connecting rod head of the connecting rod with a second guiding surface. This configuration has the advantage that the cooling oil guide sleeve spring-elastically presses against the connecting rod head of the connecting rod as well. Because of this, a sealing effect between cooling oil guide sleeve and connecting rod can be ensured.
According to a further advantageous further development of the invention, the cooling oil guide sleeve comprises a projection on an end facing away from the connecting rod, which with disassembled connecting rod holds the cooling oil guide sleeve on the piston lower part. Through the forming of this projection, separate locking rings can be omitted. Accordingly, the number of the assemblies of the piston can also be reduced because of this and the assembly of the latter simplified.
According to a further advantageous further development of the invention, the piston lower part is adjoining the support surface of the piston lower part, against which the first guiding surface of the cooling oil guide sleeve spring-elastically presses, and accordingly adjoining the cooling oil guide sleeve contoured funnellike, in order to conduct the cooling oil guided by the cooling oil guide sleeve into the first cooling space. Through the funnel-like contouring of the piston lower part adjacent to the cooling oil guide sleeve the transfer of the cooling oil into the first cooling space can be improved.
Preferred further developments of the invention are obtained from the subclaims and the following description. Exemplary embodiments of the invention are explained in more detail with the help of the drawing without being restricted to this. Here it shows:
Fig. 1: a cross section through a first piston according to the invention in a first section direction;
Fig. 2: the detail II of Fig. 1;
Fig. 3: a cross section through the piston according to the invention of Fig. 1 in a second section direction;
Fig. 4: a further development of the piston of Fig. 1;
Fig. 5: a cross section through a second piston according to the invention in the first section direction;
Fig. 6: a cross section through a third piston according to the invention in the second section direction; and
Fig. 7: the detail VII of Fig. 6.
The present invention relates to an oil-cooled piston of an internal combustion engine, in particular of an internal combustion engine embodied as a diesel engine or a gas engine or a diesel-gas engine, such as for example of a marine diesel engine. Such a piston is also described as trunk piston.
Fig. 1 to 3 each show cross sections through a piston of an internal combustion engine according to the invention in different section directions, wherein the piston comprises a piston upper part 10 and a piston lower part 11. The piston upper part 10 with a piston trough 16 and the piston lower part 11 are preferentially produced from a light metal, steel or spheroidal graphite iron. The piston upper part 10 and the piston lower part 11 support themselves on one another and are preferentially fastened to one another via fastening means embodied as tensile screws.
In a bore of the piston lower part 11, a piston pin 12 is mounted, wherein the piston pin 12 serves for connecting a piston to a connecting rod 13 of the internal combustion engine. A so-called connecting rod head of the connecting rod 13 is shown in Fig. 2.
Between the piston upper part 10 and the piston lower part 11 a first, inner cooling space 15 is formed on the one hand and a second, outer cooling space for cooling 011 which is not shown in the drawing, on the other hand, wherein the inner cooling space 15 is connected to the outer cooling space according to Fig. 2 via transfer bores 17.
Cooling oil, which serves for cooling the piston, can be fed to the piston via a bore 18, which extends through the connecting rod 13 and the connecting rod head 14. Flere, a cooling oil guide sleeve 19 interacts with the connecting rod 13 or the connecting rod head 14 of the connecting rod 13. The flow of the cooling oil is visualised by arrows 20.
The cooling oil guide sleeve 19 of the piston 10 according to the invention is embodied in terms of the invention as a slit sleeve. A slit 21 of the cooling oil guide sleeve 19 extends in axial direction of the piston or of the cooling oil guide sleeve 19.
In the disassembled state, the cooling oil guide sleeve 19 has an outer diameter which is greater than an inner diameter of a recess in the piston lower part 11, into which the cooling oil guide sleeve 19 is to be inserted. For inserting the cooling oil guide sleeve 19 into this recess of the piston lower part 11, the cooling oil guide sleeve 19 is compressed accordingly while reducing a so-called jaw width of the slit 21, wherein following the inserting of the cooling oil guide sleeve 19 into the piston lower part 11, a first guiding surface 22 of the cooling oil guide sleeve 19 spring-elastically presses against a corresponding support surface 23 of the piston lower part 11.
Accordingly, the cooling oil guide sleeve 19 is embodied unitarily or in one piece and is assembled in the piston lower part 11 without separate spring element.
According to a preferred further development of the invention, the first guiding surface 22 of the cooling oil guide sleeve 19 and the support surface 23 of the piston lower part 11, against which the first guiding surface 22 of the cooling oil guide sleeve 19 spring-elastically presses, are contoured in the manner of a truncated cone. Because of this it is ensured that the cooling oil guide sleeve 19 furthermore spring-elastically presses against a support surface 25 of the connecting rod head 14 of the connecting rod 13 with a second guiding surface 24.
The first guiding surface 22 of the cooling oil guide sleeve 19 and the corresponding support surface 23 of the piston lower part 11 in this case taper starting out from an end of the cooling oil guide sleeve 19 facing the connecting rod 13 seen in axial direction of the piston or of the cooling oil guide sleeve 19 in the direction of an end 27 of the cooling oil guide sleeve 19 facing away from the connecting rod 13.
As already explained, the cooling oil guide sleeve 19, following the assembly of the cooling oil guide sleeve 19 in the corresponding recess in the piston lower part 11, is spring-elastically pressed with the first guide surface 22 against the support surface 23 of the piston lower part.
In particular when the connecting rod 13 is subsequently assembled, the cooling oil guide sleeve 19 is further compressed, so that as a result of the contouring of the first guide surface 22 and of the support surface 23 in the manner of a truncated cone the cooling oil guide sleeve 19 spring-elastically presses against the corresponding support surface 25 of the connecting rod head 14 of the connecting rod 13 with the second guide surface 24. Because of this, lifting of the cooling oil guide sleeve 19 off the connecting rod head 14 of the connecting rod 13 is prevented and a sound seal between the connecting rod head 14 of the connecting rod 13 and the cooling oil guide sleeve 19 ensured at all times.
As is best evident from the detail of Fig. 2, the cooling oil guide sleeve 19 comprises a projection 28 on the end 27 facing away from the connecting rod 13, which, in particular when the cooling oil guide sleeve 19 is inserted into the piston lower part 11 and in particular when the connecting rod 13 is disassembled, holds the cooling oil guide sleeve 19 in the piston lower part 11. To this end, the projection 28 on the end 27 of the cooling oil guide sleeve 19 has an outer diameter that is greater than an inner diameter of the support surface 23 of the piston lower part 11 in the region of the tapered end of the latter.
In the exemplary embodiment of Fig. 1 to 3, adjoining the support surface 23 of the piston lower part 11, against which the first guide surface 22 of the cooling oil guide sleeve 19 spring-elastically presses, and accordingly adjoining the cooling oil guide sleeve 19, the piston lower part 11 is contoured funnel-like. Because of this, the cooling oil that is guided by the cooling oil guide sleeve 19 can be conducted into the first cooling space 15 in a defined manner.
In a further development of the piston of Fig. 1 to 3 shown in Fig. 4, a further cooling oil guide sleeve 30 is inserted into a neck-like portion 29 of the piston lower part 11 in the region of its funnel-like contouring, with the help of which the location at which the cooling oil that is guided by the cooling oil guide sleeve 19 and the funnel-like portion of the piston lower part 11 enters the first cooling space 15 can be influenced. Because of this, the flow of the cooling oil in the first cooling space 15 can be adjusted in a defined manner.
Fig. 5 shows a version of a piston according to the invention, in which the piston lower part 11, adjoining the support surface 23 of the piston lower part 11, against which the first guide surface 22 of the slit cooling oil guide sleeve 19 spring-elastically presses, and accordingly adjoining the cooling oil guide sleeve 19, is contoured cylindrically. With such a configuration of the piston lower part 11, installation space advantages can be realised. In addition, producing such a piston lower part 11 is simpler. The funnel-like contouring of the piston lower part 11 adjacently to the cooling oil guide sleeve 19 in terms of the exemplary embodiments 1 to 4 however has the disadvantage that an undesirable return flow of cooling oil out of the first cooling oil space 15 can be reduced.
In the exemplary embodiments of Fig. 1 to 5, the first guide surface 22 of the cooling oil guide sleeve 19, with which the cooling oil guide sleeve 19 spring-elastically presses against the corresponding support surface 23 of the piston lower part, contoured in the manner of a truncated cone in each case. In contrast with this, Fig. 6 and 7 show an exemplary embodiment of a piston, in which the first guide surface 22 of the cooling oil guide sleeve 19 and the corresponding support surface 23 of the piston lower part 11 are contoured cylindrically in each case. In this exemplary embodiment, too, the cooling oil guide sleeve 19 which is inserted into the piston lower part 11, spring-elastically presses against the support surface 23 of the piston lower part 11, wherein in turn a projection 28 on the end 27 of the cooling oil guide sleeve 19 facing away from the piston rod 13 holds said cooling oil guide sleeve 19 on the piston lower part 11 with the connecting rod 14 disassembled. In particular when, as in the exemplary embodiment of Fig. 6 and 7, the first guide sleeve 22 of the cooling oil guide sleeve 19 and the corresponding support surface 23 of the piston lower part 11 are contoured cylindrically, the cooling oil guide sleeve 19 is not compressed to a greater degree with assembled connecting rod 14, so that the cooling oil guide sleeve 19 with its guide surface 24 does not spring-elastically press against the corresponding support surface 25 of the connecting rod head 14 of the connecting rod 13. However, an adequate sealing effect between cooling oil guide sleeve 19 and connecting rod 13 is also ensured in this case, since the cooling oil guide sleeve 19 with its guide surface 24 sits on the corresponding support surface 25 of the connecting rod 13.
Owing to the use of a slit cooling oil guide sleeve 19, which at least with the first guide surface 22 spring-elastically presses against the corresponding support surface 22 of the piston lower part 11, the construction and the assembly of a piston with cooling oil can be clearly simplified. A lower number of assemblies and accordingly a lower number of assembly steps are required. Furthermore, the friction between the cooling oil guide sleeve 19 and the connecting rod head 14 of the connecting rod 13 can be reduced. Because of this, the lifespan of the components can be increased.
The invention is employed in particular with pistons of large engines such as diesel engines or gas engines or diesel-gas engines in all sectors, the outer diameter of which is in the range between 100 mm and 600 mm. A distance between the connecting rod head 14 of the connecting rod 13 and the cooling lower part 11 in the region of the cooling oil guide sleeve 19 amounts to between 0.5 mm and 10 mm. The cooling oil guide sleeve 19 bridges this distance and ensures sound sealing with respect to the connecting rod head 14 of the connecting rod 13.
List of reference numbers 10 Piston upper part 11 Piston lower part 12 Piston pin 13 Connecting rod 14 Connecting rod head 15 Cooling space 16 Piston trough 17 T ransfer bore 18 Bore 19 Cooling oil guide sleeve 20 Cooling oil flow 21 Slit 22 Guide surface 23 Support surface 24 Guide surface 25 Support surface 26 End 27 End 28 Projection 29 Neck-like portion 30 Cooling oil guide sleeve

Claims (8)

1. Polttomoottorin mäntä, jossa on männänyläosa (10) ja män-nänalaosa (11), männäntappi (12), joka on sijoitettu männänalaosaan (11) ja joka toimii männän kytkentänä polttomoottorin kiertokankeen (13), männän yläosan (10) ja männänalaosan (11) välille muodostettu, erityisesti sisempi jäähdytystila (15) männän jäähdyttämistä varten olevaa jäähdytysöljyä varten, joka jäähdytystila on yhdistetty vähintään yhdellä juoksutusporauksella (17) männänyläosan (10) ja männänalaosan (11) välille muodostettuun toiseen, erityisesti ulompaan jäähdytystilaan, ja jäähdytysöljynohjausholkki (19), joka ohjaa porauksen (18) kautta kiertokankeen (13) ohjatun jäähdytysöljyn ensimmäisen jäähdytystilan (15) suuntaan, jolloin jäähdytysöljynohjausholkki (19) on muodostettu halkaistuksi hoikiksi, joka painautuu ensimmäisen ohjauspinnan (22) välityksellä jousielastisesti männänalaosan (11) tukipintaa (23) vasten, tunnettu siitä, että jäähdytysöljynohjausholkin (19) ensimmäinen ohjaus-pinta (22) ja männänalaosan (11) tukipinta (23), jota vasten jäähdytysöljynohjausholkin (19) ensimmäinen ohjauspinta (22) painautuu jousielastisesti, on muodostettu katkaistun kartion muotoiseksi, niin että jäähdytysöljynohjausholkki (19) painautuu lisäksi toisen ohjauspinnan (24) välityksellä jousielastisesti kiertokangen (13) kangenpään (14) tukipintaa (25) vasten, ja että jäähdytysöljynohjausholkin (19) ensimmäinen ohjauspinta (22) ja männänalaosan (11) tukipinta (23) lähtien kiertokankea (13) kohti olevasta päästä (26) kapene-vat männän tai jäähdytysöljynohjausholkin (19) aksiaalisuunnassa kiertokan-gesta (13) poispäin käännetyn pään (27) suunnassa.An internal combustion piston having a piston top portion (10) and a piston bottom portion (11), a piston pin (12) disposed within the piston bottom portion (11) and acting as a piston coupling to the internal combustion engine connecting rod (13), piston top portion (10), and 11) an intermediate cooling space (15), in particular an inner cooling space (15) for cooling the piston, connected to the second, especially outer cooling space (19) formed by at least one fluid bore (17) between the pine top (10) and the piston bottom (11) guiding the cooling oil guide sleeve (19) through the bore (18) in the direction of the first cooling space (15) guided by the connecting rod (13), the cooling oil guide sleeve (19) being resiliently pressed against the support surface (23) characterized in that the cooling oil the first guide surface (22) of the rail guide sleeve (19) and the support surface (23) of the piston lower part (11) against which the first guide surface (22) of the cooling oil guide sleeve (19) is spring-resiliently formed are formed so that the cooling oil guide sleeve (19) via a guide surface (24) resiliently against the support surface (25) of the connecting rod (13) for the connecting rod (14), and that the first guide surface (22) of the cooling oil guide sleeve (19) and the bearing surface (23) ) taper in the axial direction of the piston or cooling oil guide sleeve (19) in the direction of the pivoting head (27) away from the crank (13). 2. Patenttivaatimuksen 1 mukainen mäntä, tunnettu siitä, että jäähdytysöljynohjausholkissa (19) oleva rako (21) ulottuu männän tai jäähdytysöljynohjausholkin (19) pituussuunnassa.Piston according to Claim 1, characterized in that the gap (21) in the cooling oil guide sleeve (19) extends in the longitudinal direction of the piston or the cooling oil guide sleeve (19). 3. Patenttivaatimuksen 1 tai 2 mukainen mäntä, tunnettu siitä, että jäähdytysöljynohjausholkin (19) ensimmäinen ohjauspinta (22) ja männänalaosan (11) tukipinta (23), jota vasten jäähdytysöljynohjausholkin (19) ensimmäinen ohjauspinta (22) painautuu jousielastisesti, on muodostettu sylinte-rimäiseksi.Piston according to claim 1 or 2, characterized in that the first guide surface (22) of the cooling oil guide sleeve (19) and the support surface (23) of the piston lower part (11) against which the first guide surface (22) of the cooling oil guide sleeve (19) type arrangement. 4. Jonkin patenttivaatimuksen 1 - 3 mukainen mäntä, tunnettu siitä, että männänalaosa (11), joka rajoittuu männänalaosan (11) tukipintaan (23) , jota vasten jäähdytysöljynohjausholkin (19) ensimmäinen ohjauspinta (22) painautuu jousielastisesti, on muodostettu jäähdytysöljynohjausholkkiin (19) rajoittuen suppilomaiseksi.Piston according to one of Claims 1 to 3, characterized in that the piston lower part (11), which is bordered by a spring elasticity of the first guiding surface (22) of the cooling oil guide sleeve (19) against the support surface (23), is formed on the cooling oil guide sleeve (19). limited to a funnel. 5. Patenttivaatimuksen 4 mukainen mäntä, tunnettu siitä, että männänalaosan (11) suppilokaulaosaan (29) on sovitettu toinen jäähdytysöl-jynohjausholkki (30).Piston according to Claim 4, characterized in that a second cooling oil guide sleeve (30) is arranged in the funnel neck portion (29) of the piston lower part (11). 6. Jonkin patenttivaatimuksen 1 - 4 mukainen mäntä, tunnettu siitä, että männänalaosa (11), joka rajoittuu männänalaosan (11) tukipintaan (23), jota vasten jäähdytysöljynohjausholkin (19) ensimmäinen ohjauspinta (22) painautuu jousielastisesti, on muodostettu jäähdytysöljynohjausholkkiin (19) rajoittuen sylinterimäiseksi.Piston according to one of Claims 1 to 4, characterized in that the piston lower part (11), which is bordered by a spring elasticity of the first guiding surface (22) of the cooling oil guide sleeve (19) against the support surface (23), is formed on the cooling oil guide sleeve (19). limited to cylindrical. 7. Jonkin patenttivaatimuksen 1 - 6 mukainen mäntä, tunnettu siitä, että jäähdytysöljynohjausholkissa (19) on kiertokangesta (13) poispäin olevassa päässä (27) uloke (28), joka kiertokangen (13) ollessa paikalleen asennettuna pitää jäähdytysöljynohjausholkin (19) männänalaosassa (11).Piston according to one of Claims 1 to 6, characterized in that the cooling oil guide sleeve (19) has a projection (28) at the end (27) away from the connecting rod (13) which, when mounted, holds the cooling oil guide sleeve (19) ). 8. Jonkin patenttivaatimuksen 1 - 7 mukainen mäntä, tunnettu siitä, että sen ulkohalkaisija on välillä 100 - 600 mm, jolloin kiertokangen (13) kangenpään (14) ja männänalaosan (11) välinen etäisyys jäähdytysöljynohjausholkin (19) alueella on välillä 0,5-10 mm.Piston according to one of Claims 1 to 7, characterized in that it has an outer diameter of between 100 and 600 mm, wherein the distance between the connecting end (14) of the connecting rod (13) and the piston bottom (11) in the region of the cooling oil 10 mm.
FI20145121A 2013-02-11 2014-02-07 Piston of internal combustion engine FI126963B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102013002232.0A DE102013002232B4 (en) 2013-02-11 2013-02-11 Pistons of an internal combustion engine

Publications (2)

Publication Number Publication Date
FI20145121A FI20145121A (en) 2014-08-12
FI126963B true FI126963B (en) 2017-08-31

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JP (1) JP6297852B2 (en)
KR (1) KR102087200B1 (en)
CN (1) CN103982318B (en)
DE (1) DE102013002232B4 (en)
FI (1) FI126963B (en)

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AT520354B1 (en) * 2017-09-12 2019-06-15 Avl List Gmbh Internal combustion engine
DE102018203417A1 (en) * 2018-03-07 2019-09-12 Mahle Lnternational Gmbh Piston arrangement of an internal combustion engine
DE102019122877B4 (en) 2019-08-27 2021-08-19 Man Energy Solutions Se Pistons of an internal combustion engine

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DE3502644A1 (en) * 1985-01-26 1986-07-31 M.A.N.-B & W Diesel GmbH, 8900 Augsburg OIL-COOLED, MULTI-PIECE SUBMERSIBLE PISTON FOR PISTON PISTON COMBUSTION ENGINES
DE3511852C1 (en) * 1985-03-30 1987-01-02 Man B & W Diesel Gmbh Oil-cooled monoblock trunk piston for internal combustion engines
DE3518721C3 (en) 1985-05-24 1997-09-04 Man B & W Diesel Ag Oil-cooled, multi-part plunger of an internal combustion engine
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
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US20100108001A1 (en) * 2008-11-05 2010-05-06 Rainer Scharp Multi-part piston for an internal combustion engine and method for its production
JP5513771B2 (en) * 2009-05-25 2014-06-04 株式会社東芝 Synchronous verification system
DE102010033882A1 (en) * 2010-08-10 2012-02-16 Mahle International Gmbh Piston for an internal combustion engine
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JP2014175256A (en) * 2013-03-12 2014-09-22 Panasonic Corp Contact terminal and contact switchgear using the same

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Publication number Publication date
JP2014169695A (en) 2014-09-18
CN103982318A (en) 2014-08-13
CN103982318B (en) 2018-01-02
KR102087200B1 (en) 2020-03-10
FI20145121A (en) 2014-08-12
DE102013002232B4 (en) 2022-11-17
JP6297852B2 (en) 2018-03-20
KR20140101685A (en) 2014-08-20
DE102013002232A1 (en) 2014-08-14

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