EP2679792B1 - Kopfabdeckungsstruktur für einen verbrennungsmotor - Google Patents

Kopfabdeckungsstruktur für einen verbrennungsmotor Download PDF

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Publication number
EP2679792B1
EP2679792B1 EP12749912.7A EP12749912A EP2679792B1 EP 2679792 B1 EP2679792 B1 EP 2679792B1 EP 12749912 A EP12749912 A EP 12749912A EP 2679792 B1 EP2679792 B1 EP 2679792B1
Authority
EP
European Patent Office
Prior art keywords
portions
upper side
outer peripheral
side bearing
cam shaft
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
EP12749912.7A
Other languages
English (en)
French (fr)
Other versions
EP2679792A4 (de
EP2679792A1 (de
Inventor
Tomoya Fujimoto
Masao Sakashita
Koji Hirano
Kei Ueda
Takehisa Tachikawa
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.)
Honda Motor Co Ltd
Original Assignee
Honda Motor Co Ltd
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
Application filed by Honda Motor Co Ltd filed Critical Honda Motor Co Ltd
Publication of EP2679792A1 publication Critical patent/EP2679792A1/de
Publication of EP2679792A4 publication Critical patent/EP2679792A4/de
Application granted granted Critical
Publication of EP2679792B1 publication Critical patent/EP2679792B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/006—Camshaft or pushrod housings
    • 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
    • F01L2001/0476—Camshaft bearings

Definitions

  • the present invention relates to a head cover structure for an internal combustion engine.
  • the upper portion of the cylinder head for an internal combustion engine is provided with a valve train that drives intake valves and exhaust valves for opening and closing of intake ports and exhaust ports communicating with combustion chambers. Further, the upper portion of the cylinder head is provided with a head cover to cover the valve train.
  • upper side members the upper side members being disposed on the upper side of a cam shaft, out of plural bearing members that axially support the cam shaft by sandwiching from the upper side and the lower side are integrally formed with the head cover.
  • the upper side members are disposed at equal intervals along the axial direction of the cam shaft, wherein a cover portion for covering the gap between neighboring upside members is formed substantially in a flat plat shape.
  • Patent Document 1 Chinese Examined Utility Model Registration Application No. CN201206478Y .
  • Document DE4323073 A1 discloses a similar head cover structure.
  • auxiliary units are a cam angle sensor (TDC sensor) for detecting the rotational angle of a cam shaft, a common rail for supplying high pressure fuel to a fuel injection device, and the like,.
  • TDC sensor cam angle sensor
  • a conventional head cover structure has a possibly of dropping the detection accuracy of a cam angle sensor by vibration of the head cover.
  • the auxiliary units being for example a common rail having been conventionally attached to a cylinder head, it is possible to increase vibration and noise. Therefore, further increasing of the stiffness (in another word, rigidity) of a head cover has been desired.
  • the present invention has been developed to solve these problems, and an object of the invention is to provide a head cover structure, for an internal combustion engine, that enables improvement in the stiffness of a head cover, while inhibiting an increase in thickness and size of the head cover.
  • a head cover structure for an internal combustion engine, includes: a cover portion for covering, from an upper side, a valve train including a cam shaft/shafts disposed at a cylinder head; an outer peripheral marginal portion provided along an outer peripheral margin of the cover portion and tightened to the cylinder head; and a plurality of upper side bearing portions provided integrally with the cover portion and the outer peripheral marginal portion to rotatably hold the cam shaft/shafts in collaboration with a plurality of lower side bearing portions provided on the cylinder head, wherein the upper side bearing portions are tightened and fixed to the lower side bearing portions, and wherein the cover portion includes bulging portions bulging substantially in a hemispherical shape between neighboring ones of the upper side bearing portions.
  • the stiffness of the cover portion is increased by the bulging portions substantially in a hemispherical shape. Further, as the stiffness of the head cover is increased by these bulging portions, it is possible to reduce vibration and sound. Further, as the stiffness of the head cover is increased by the shape of the bulging portions, it is possible to reduce an increase in the thickness and the size of the head cover.
  • the upper side bearing portions include bearing side tightening/fixing portions tightened and fixed to the lower bearing portions;
  • the outer peripheral marginal portion includes outer peripheral side tightening/fixing portions at middle parts between neighboring ones of the upper side bearing portions, the outer peripheral side tightening/fixing portions being tightened and fixed to the cylinder head;
  • first reinforcement limbs are provided between the bearing side tightening/fixing portions and the outer peripheral side tightening/fixing portions; and the bulging portions are provided at parts surrounded by neighboring ones of the upper side bearing portions and the first reinforcement limbs.
  • the stiffness of the head cover is further increased, and it is possible to further reduce vibration and noise.
  • second reinforcement limbs are provided on lower surfaces of the bulging portions, extending from top points of the bulging portions toward the bearing side tightening/fixing portions and the outer peripheral side tightening/fixing portions.
  • the cam shafts include an intake side cam shaft and an exhaust side cam shaft; the upper side bearing portions are disposed in a plural number respectively along the intake side cam shaft and the exhaust side cam shaft; and the bulging portions are provided at least between the upper side bearing portions along the intake side cam shaft or between the upper side bearing portions along the exhaust side cam shaft.
  • a head cover structure for an internal combustion engine, that enables improvement in the stiffness of a head cover.
  • FIGS. 1 to 4 An embodiment of the present invention will be described below in detail, referring to FIGS. 1 to 4 .
  • the present embodiment will be described, taking an example of a case of applying the invention to a head cover for the engine of a vehicle.
  • the same reference number will be assigned to the same elements, and overlapping description will be omitted.
  • description of the directions will be based on front (F), back (B), left (L), and right (R) shown in FIG. 1 .
  • an internal combustion engine E is an in-line four cylinder engine of DOHC (Double OverHead Camshaft) type.
  • DOHC Double OverHead Camshaft
  • the basic configuration of the internal combustion engine E includes, though not shown, a cylinder block for housing pistons, connecting rods, cranks, and the like, an oil pan for storing oil, and the like.
  • the internal combustion engine E is transversely installed such that the direction of the row of cylinders is the left/right direction with respect to the vehicle, wherein air is taken in from the back and exhausted from the front.
  • the cylinder head 2 is a member forming combustion chambers, intake ports and exhaust ports (not shown).
  • the cylinder head 2 includes intake valves and exhaust valves (not shown) for opening and closing the intake ports and the exhaust ports respectively, and the upper portion of the cylinder head 2 is provided with a valve train 3 to drive these intake valves and exhaust valves. Further, the side portion of the cylinder head 2 (more concretely, for the internal combustion engine E) is provided with a transmission mechanism 4 for transmitting rotation of the cranks to the valve train 3.
  • the cylinder head 2 includes an outer peripheral wall 21 standing up in a frame shape along the outer peripheral margin of an upper surface 2a, and a central wall 22 standing up from the central portion with respect to the front/back direction of the upper surface 2a. Further, as shown in FIG. 3 , between the outer peripheral wall 21 and the central wall 22, the cylinder head 2 is provided with plural lower side bearing portions 23 for axially supporting cam shafts 31, 32 of the valve train 3.
  • the lower side bearing portions 23 are parts in a wall shape extending along the front/back direction, and have respective recessed portions 23a in a semicircular shape at the central portion of the upper surface thereof.
  • the lower side bearing portions 23 are provided at positions corresponding to the positions of upper side bearing portion 13 provided on the later-described head cover 1.
  • the valve train 3 includes the pair of cam shafts 31, 32 arranged along the direction of the row of cylinders and in parallel to each other, and plural cams 33 (see FIG. 4 ) that are fixed respectively to the cam shaft 31 and the cam shaft 32.
  • the cam shaft 31 is an intake side cam shaft for opening and closing the intake valves
  • the cam shaft 32 is an exhaust side cam shaft for opening and closing the exhaust valves.
  • the head cover 1 is attached to the upper portion of the cylinder head 2, and is a metal member of an aluminum alloy for covering the valve train 3.
  • the head cover 1 mainly includes a cover portion 11 for covering the valve train 3, an outer peripheral marginal portion 12 forming the outer peripheral margin of the head cover 1, and the upper side bearing portions 13 for axially supporting the cam shafts 31, 32 of the valve train 3. Further, at the central portion with respect to the front/back direction of the head cover 1, a recessed groove portion 14 is extended along the left/right direction for installing a fuel injection device (not shown).
  • the outer peripheral marginal portion 12 is a part in a frame shape provided at the outer peripheral margin of the cover portion 11.
  • the outer peripheral marginal portion 12 is arranged on the outer peripheral wall 21 provided on the upper surface of the cylinder head 2.
  • the outer peripheral marginal portion 12 has plural bolt penetration holes 12a for penetration of bolts B, which are tightening members, and the bolt penetration holes 12a are partially provided between neighboring upper side bearing portions 13. These bolt penetration holes 12a correspond to 'outer peripheral side tightening/fixing portion' in claims.
  • bolt tightening holes 21a for tightening the bolts B are formed at positions, the positions corresponding to the bolt penetration holes 12a, of the outer peripheral wall 21 (see FIG. 4 ).
  • the upper side bearing portions 13 are parts for rotatably holding the cam shafts 31, 32 of the valve train 3 in collaboration with the plural lower side bearing portions 23 provided at the cylinder head 2.
  • the upper side bearing portions 13 are wall shaped parts extending along the front/back direction and are provided between the outer peripheral marginal portion 12 and the recessed groove portion 14, being separated from each other along the left/right direction.
  • the upper side bearing portions 13 are arranged on both the left and right sides of the respective cylinders.
  • an upper side bearing portion 13c arranged on the left side of the leftmost cylinder serves also as the left end portion 12b (see FIG. 2A ) of the outer peripheral marginal portion 12.
  • the central portion, with respect to the front/back direction, of the lower surfaces of the upper side bearing portions 13 are provided with respective recessed portions 13a in a semicircular shape.
  • These recessed portions 13a provided on the upper side bearing portions 13 and the respective recessed portions 23a provided on the lower side bearing portions 23 form the bearing portions, which axially and rotatably support the respective cam shafts 31, 32.
  • Bolt penetration holes 13b for penetration of bolts B, which are tightening members, are provided on the both the front and back sides of the recessed portions 13a. These bolt penetration holes 13b correspond to 'bearing side tightening/fixing portion' in claims.
  • the lower side bearing portions 23 of the cylinder head 2 are provided with bolt tightening holes 23b for tightening bolts B at positions corresponding to the bolt penetration holes 13b.
  • the cover portion 11 is a plate shaped part for covering the valve train 3, and is disposed being separated upward from the valve train 3 (see FIG. 4 ).
  • the cover portion 11 has bulging portions 111 bulging upward in a substantially hemispherical shape between neighboring upper side bearing portions 13.
  • the cover portion 11 has first reinforcement limbs 15 for reinforcing the bulging portions 111.
  • the first reinforcement limbs 15 are extended such as to stand up between the bolt penetration holes 12a of the outer peripheral marginal portion 12 and bolt penetration holes 13b of the upper side bearing portions 13, the bolt penetration holes 12a being provided between neighboring upper side bearing portions 13.
  • the bulging portions 111 are surrounded by neighboring upper side bearing portions 13 and the first reinforcement limbs, and are thus in a state of being peripherally reinforced.
  • 'a substantially hemispherical shape' includes, in addition to a hemispherical shape, a shape that can be recognized to be equal to a hemispherical shape (so-called dome shape, etc.).
  • second reinforcement limbs16 are radially provided, extending from the top point 111a of the bulging portion 111 toward the bolt penetration hole 13b of the upper side bearing portion 13, the bolt penetration hole 12a of the outer peripheral marginal portion 12, the bolt penetration hole 12a being provided between neighboring upper side bearing portions 13, and the recessed groove portion 14.
  • the second reinforcement limbs 16 are disposed substantially symmetrically with the top point 111a as the center. As the bulging portion 111 is thereby uniformly reinforced, vibration and noise can be reduced. Further, in order to avoid interference with the cam 33, the second reinforcement limbs 16 are curved such as to be convex upward along the lower surface of the bulging portion 111 (see FIG. 4 ).
  • a common rail 5 is attached to the back end portion of the head cover 1 to supply high pressure fuel to a fuel injection device, not shown.
  • a cam angle sensor 6 is attached to the upper surface of the head cover 1 to detect the rotation angle of the cam shaft 32.
  • a negative pressure pump 7 is attached to the end portion, on the left side, of the head cover 1 to supply an operational hydraulic pressure to a valve timing adjustable mechanism (not shown) of the valve train 3.
  • an engine hanger 8 is attached on the left side of the front end portion of the head cover 1 to hold the internal combustion engine E at a vehicle body frame, not shown.
  • an opening 9 is provided through the upper surface of the right end portion of the head cover 1 to exhaust blow-by gas to a gas-liquid separation chamber (not shown) provided separately from the head cover 1.
  • the head cover structure, for an internal combustion engine, according to the present embodiment is basically configured as described above. The operation and advantage thereof will be described below.
  • the upper side bearing portions 13 for axially supporting the cam shafts 31, 32 are provided integrally with the head cover 1, and bulging portions 111 bulging substantially in a hemispherical shape are formed between neighboring upper side bearing portions 13.
  • the stiffness of the cover portion 11 is increased by the bulging portions 111 substantially in a hemispherical shape. Accordingly, it is possible to increase the stiffness of the head cover 1 as a whole and thereby reduce vibration and noise, while reducing an increase in the thickness and size of the head cover 1.
  • first reinforcement limbs 15 are provided between a bolt penetration hole 12a of the outer peripheral marginal portion 12 and bolt penetration holes 13b of upper side bearing portions 13, the bolt penetration hole 12a being provided between the neighboring upper side bearing portions 13; and a bulging portion 111 is provided at a part surrounded by the neighboring upper side bearing portions 13 and the first reinforcement limbs 15. Accordingly, the stiffness of the head cover 1 is further increased, and it is thereby possible to reduce vibration and noise.
  • second reinforcement limbs16 are radially provided, extending from the top point 111a of the bulging portion 111 toward the bolt penetration holes 13b of the upper side bearing portions 13, the bolt penetration hole 12a of the outer peripheral marginal portion 12, the bolt penetration hole 12a being provided between the neighboring upper side bearing portions 13, and the recessed groove portion 14. Accordingly, the stiffness of a bulging portion 111 can be further increased, and vibration and noise can be further reduced.
  • second reinforcement limbs 16 are disposed substantially symmetrically with a top point 111a as the center, a bulging portion 111 can be uniformly reinforced, and vibration and noise can thereby be reduced.
  • auxiliary units such as the common rail 5, the cam angle sensor 6, the negative pressure pump 7, the engine hanger 8, and the like can be attached to the head cover 1.
  • auxiliary units such as the common rail 5, the cam angle sensor 6, the negative pressure pump 7, the engine hanger 8, and the like can be attached to the head cover 1.
  • the invention is applied to an internal combustion engine E of a so-called DOHC type, however, without being limited thereto, the invention may also be applied to an internal combustion engine, for example, of a SOHC (Single OverHead Camshaft) type.
  • DOHC Single OverHead Camshaft
  • a gas-liquid separation chamber is separately provided outside the head cover 1, however, a gas-liquid separation chamber may be provided inside the head cover 1.
  • weight reduction and downsizing of the head cover 1 can be attained by providing a gas-liquid separation chamber of, for example, a resin separately from the head cover 1 wherein the gas-liquid separation chamber communicates with the opening 9.
  • bulging portion 111 are formed between all neighboring upper side bearing portions 13, however, the invention is not limited thereto, and it is only necessary that bulging portion 111 are formed at positions, at which reinforcement is necessary, out of positions between all plural neighboring upper side bearing portions 13.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Claims (4)

  1. Kopf-Abdeckungs-Struktur für einen Verbrennungsmotor, umfassend:
    einen Abdeckungsabschnitt (11) zum Abdecken eines Ventilzugs von einer oberen Seite, umfassend eine Nockenwelle / Nockenwellen (31, 32), welche an einem Zylinderkopf (2) angeordnet ist/sind;
    einen äußeren Umfangsrandabschnitt (12), welcher entlang eines äußeren Umfangsrands des Abdeckungsabschnitts (11) vorgesehen ist und an den Zylinderkopf (2) festgemacht ist; und
    eine Mehrzahl von oberen Seiten-Lager-Abschnitten (13), welche integral mit dem Abdeckungsabschnitt (11) und dem äußeren Umfangsrandabschnitt (12) bereitgestellt sind, um die Nockenwelle / Nockenwellen (31, 32) in Zusammenarbeit mit einer Mehrzahl von unteren Seiten-Lager-Abschnitten (23), welche an dem Zylinderkopf (2) vorgesehen sind, rotierbar zu halten,
    wobei die oberen Seiten-Lager-Abschnitte (13) an die unteren Seiten-Lager-Abschnitte (23) festgemacht und befestigt sind,
    und wobei der Abdeckungsabschnitt (13) Wulstabschnitte (111) umfasst,
    dadurch gekennzeichnet, dass sich die Wulstabschnitte im Wesentlichen in einer hemisphärischen Form zwischen Benachbarten der oberen Seiten-Lager-Abschnitte (13) auswölben.
  2. Kopf-Abdeckungs-Struktur für einen Verbrennungsmotor nach Anspruch 1,
    wobei die oberen Seiten-Lager-Abschnitte (13) Lager-Seiten-Festmachungs-/-Befestigungs-Abschnitte (13b) umfassen, welche an die unteren Seiten-Lager-Abschnitte festgemacht und befestigt sind,
    wobei der äußere Umfangsrandabschnitt (12) äußere Umfangs-Seiten-Festmachungs-/-Befestigungs-Abschnitte (12a) an Mittelteilen zwischen Benachbarten der oberen Seiten-Lager-Abschnitte (13) umfasst, wobei die äußeren Umfangs-Seiten-Festmachungs-/- Befestigungs-Abschnitte (12a) an den Zylinderkopf (2) festgemacht und befestigt sind,
    wobei erste Verstärkungsschenkel (15) zwischen den Lager-Seiten-Festmachungs-/-Befestigungs-Abschnitten und den äußeren Umfangs-Seiten-Festmachungs-/-Befestigungs-Abschnitten vorgesehen sind, und wobei die Wulstabschnitte (111) an Teilen vorgesehen sind, welche von Benachbarten der oberen Seiten-Lager-Abschnitte (13) und den ersten Verstärkungsschenkeln (15) umgeben sind.
  3. Kopf-Abdeckungs-Struktur für einen Verbrennungsmotor nach Anspruch 2,
    wobei zweite Verstärkungsschenkel (16) an unteren Flächen der Wulstabschnitte (111) vorgesehen sind, welche sich von oberen Punkten der Wulstabschnitte (15) in Richtung der Lager-Seiten-Festmachungs-/-Befestigungs-Abschnitte und der Umfangs-Seiten-Festmachungs-/-Befestigungs-Abschnitte erstrecken.
  4. Kopf-Abdeckungs-Struktur für einen Verbrennungsmotor nach einem der Ansprüche 1 bis 3,
    wobei die Nockenwellen (31, 32) eine Einlass-Seiten-Nockenwelle (31) und eine Auslass-Seiten-Nockenwelle (32) umfassen,
    wobei die oberen Seiten-Lager-Abschnitte (13) in einer Vielzahl jeweils entlang der Einlass-Seiten-Nockenwelle (31) und der Auslass-Seiten-Nockenwelle (32) angeordnet sind,
    und wobei die Wulstabschnitte (111) wenigstens zwischen den oberen Seiten-Lager-Abschnitten (13) entlang der Einlass-Seiten-Nockenwelle (31) oder zwischen den oberen Seiten-Lager-Abschnitten (13) entlang der Auslass-Seiten-Nockenwelle (32) angeordnet sind.
EP12749912.7A 2011-02-22 2012-02-22 Kopfabdeckungsstruktur für einen verbrennungsmotor Not-in-force EP2679792B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011035549 2011-02-22
PCT/JP2012/054185 WO2012115123A1 (ja) 2011-02-22 2012-02-22 内燃機関のヘッドカバー構造

Publications (3)

Publication Number Publication Date
EP2679792A1 EP2679792A1 (de) 2014-01-01
EP2679792A4 EP2679792A4 (de) 2014-11-19
EP2679792B1 true EP2679792B1 (de) 2016-01-20

Family

ID=46720899

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12749912.7A Not-in-force EP2679792B1 (de) 2011-02-22 2012-02-22 Kopfabdeckungsstruktur für einen verbrennungsmotor

Country Status (4)

Country Link
EP (1) EP2679792B1 (de)
JP (1) JP5581438B2 (de)
CN (1) CN103403332B (de)
WO (1) WO2012115123A1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015124730A (ja) * 2013-12-27 2015-07-06 株式会社マーレ フィルターシステムズ カバー部材
FR3026789B1 (fr) * 2014-10-02 2016-11-04 Renault Sa Couvre-culasse de moteur a combustion interne
JP6631176B2 (ja) * 2015-11-09 2020-01-15 いすゞ自動車株式会社 内燃機関のシリンダヘッド構造及び内燃機関
DE102021201823A1 (de) * 2021-02-26 2022-09-01 Mahle International Gmbh Zylinderkopfhaube

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2958722B2 (ja) * 1991-09-03 1999-10-06 ヤマハ発動機株式会社 内燃機関のシリンダヘッドカバー構造
DE4323073A1 (de) * 1993-07-10 1995-01-12 Audi Ag Hubkolben-Brennkraftmaschine
DE20120912U1 (de) * 2001-12-24 2002-06-06 Volkswagen Ag, 38440 Wolfsburg Zylinderkopfhaube für eine Brennkraftmaschine
FR2867520B1 (fr) * 2004-03-09 2006-05-05 Renault Sas Moteur a combustion interne comportant une enceinte pour le confinement de fuites de carburant
JP4365373B2 (ja) * 2006-01-19 2009-11-18 トヨタ自動車株式会社 内燃機関のカムシャフト支持構造
JP2008057406A (ja) * 2006-08-30 2008-03-13 Toyota Motor Corp 内燃機関のカムシャフト支持構造
US7654237B2 (en) * 2007-01-23 2010-02-02 Lanxess Corporation Cam cover
CN201206478Y (zh) * 2008-04-22 2009-03-11 奇瑞汽车股份有限公司 发动机凸轮轴框架
DE202008013310U1 (de) * 2008-10-07 2009-02-12 Reinz-Dichtungs-Gmbh Zylinderkopfhaube mit metallischer Beschichtung von Sitzen für Ölsteuerventile
US8065993B2 (en) * 2008-12-16 2011-11-29 Ford Global Technologies, Llc Structural oil baffle for engine covers

Also Published As

Publication number Publication date
JPWO2012115123A1 (ja) 2014-07-07
EP2679792A4 (de) 2014-11-19
CN103403332A (zh) 2013-11-20
WO2012115123A1 (ja) 2012-08-30
JP5581438B2 (ja) 2014-08-27
CN103403332B (zh) 2015-11-25
EP2679792A1 (de) 2014-01-01

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