EP1344927B1 - Cylinder head - Google Patents

Cylinder head Download PDF

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Publication number
EP1344927B1
EP1344927B1 EP20030251474 EP03251474A EP1344927B1 EP 1344927 B1 EP1344927 B1 EP 1344927B1 EP 20030251474 EP20030251474 EP 20030251474 EP 03251474 A EP03251474 A EP 03251474A EP 1344927 B1 EP1344927 B1 EP 1344927B1
Authority
EP
European Patent Office
Prior art keywords
cylinder head
sub
rear end
end wall
cam chamber
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.)
Expired - Lifetime
Application number
EP20030251474
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1344927A2 (en
EP1344927A3 (en
Inventor
Masatoshi c/o Aichi Kikai Kogyo K. K. Hada
Tarou c/o Nissan Motor Co. Ltd. Ueno
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.)
Renault SAS
Aichi Machine Industry Co Ltd
Nissan Motor Co Ltd
Original Assignee
Renault SAS
Aichi Machine Industry Co Ltd
Nissan 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 Renault SAS, Aichi Machine Industry Co Ltd, Nissan Motor Co Ltd filed Critical Renault SAS
Publication of EP1344927A2 publication Critical patent/EP1344927A2/en
Publication of EP1344927A3 publication Critical patent/EP1344927A3/en
Application granted granted Critical
Publication of EP1344927B1 publication Critical patent/EP1344927B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/02—Arrangements of lubricant conduits
    • 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

Definitions

  • the present invention relates to the structure of a cylinder head that constitutes an internal combustion engine for automobiles or for industrial machines.
  • a cylinder head 1 on a cylinder head 1 are rotatably provided two camshafts 3, 4 for intake and for exhaust respectively through cam brackets 2, 2.
  • camshafts 3, 4 On the front ends of the camshafts 3, 4 are respectively provided timing sprockets 6, 6, and each of the camshafts 3, 4 is provided with a plurality of cams 5, 5 for valve driving.
  • the rear end of the camshaft 3 on the left of the drawing has been extended rearward as an extension 3a, and accordingly the length of the left camshaft 3 is longer than that of the right one 4.
  • This extension 3a is provided with a fuel pump cam 7 for driving the fuel pump and also on the rear end of the extension 3a is mounted a cam angle sensor plate 8 for detecting the cam angle.
  • a sub-bearing portion 12a On the sub-bearing portion 12a is mounted a sub-cam bracket 2a with bolts to prevent bending of the camshaft 3.
  • the cylinder head 1 is provided with a sub-cam chamber 10 formed as a unit, which covers the rear part of the extension 3a of the camshaft 3.
  • the sub-cam chamber 10 is projected, so that manufacture of the cylinder head 1 becomes extremely difficult.
  • the present invention is worked out in view of the above-described problems in the prior art. It is an object of the present invention to provide a cylinder head that can surely return the oil within the sub-cam chamber provided outside the rear end wall into the inside of the cylinder head.
  • a cylinder head having the structure where two camshafts for controlling intake and exhaust respectively can be provided on the top, one of which camshafts has an extension made by extending the rear end opposite a timing sprocket, the cylinder head having: a front and a rear end wall formed in parallel; said extension being arranged to be disposed outside said rear end wall; and a separate cover member mounted on the outside of said rear end wall to form a sub-cam chamber for covering said extension; characterised in that said rear end wall is pierced by an oil-returning hole to allow return of oil within said sub-cam chamber into the inside of said rear end wall, and in that said cover member comprises as a unit a sub-cam chamber-forming portion to form said sub-cam chamber and a core hole-closing portion for closing the core-supporting hole used at the time of casting said cylinder head.
  • FIG. 1 is a plan view of a cylinder head
  • FIG.2 is an enlarged rear end view of FIG.1
  • FIG.3 is a right side view of FIG.1.
  • FIG.4 is a plan view of the cylinder head on which an integrated unit of cover member and water outlet is mounted.
  • FIG.5 and FIG.6 are an enlarged rear end view and a right side view of FIG.4 respectively.
  • a cylinder head 1 is provided with two camshafts for intake and for exhaust (not shown) on the top, one of which camshafts has an extension for providing a fuel pump cam (not shown) made by extending the rear end opposite the timing sprocket (not shown).
  • a sub-bearing portion 12a for supporting the extension is provided on the cylinder head 1. This sub-bearing portion 12a is formed as a unit on the top of the rear end wall of the cylinder head 1.
  • the rear end wall of the cylinder head 1, which is a water outlet-mounting surface 19, is formed in parallel to the front-end wall 1a of the cylinder head 1.
  • a cover member 30, which is to be mounted on the rear end wall as a separate unit, forms the sub-cam chamber 10.
  • the cover member 30 is made previously together with a water outlet 22 as a unit and mounted on the water outlet-mounting surface 19 with bolts.
  • water jacket openings 20, 20 In the rear end wall or water outlet surface 19 of the cylinder head 1 is formed water jacket openings 20, 20 to circulate the cooling water, to which the water outlet 22 is connected.
  • the water outlet 22 is disposed in a separate position from the sub-cam chamber-forming portion 30a, and thereby it is prevented that the longitudinal length of the cylinder head 1 becomes too long.
  • the water outlet 22 is formed integrally with the cover member 30.
  • the cover member 30 is integrally composed of a sub-cam chamber- forming portion 30a that forms a sub-cam chamber 10 on the mounted condition and a core hole-closing portion 30b that is capable of closing the core-supporting holes 15, 15 of a valve case 9 (see FIG.5).
  • the sub-cam chamber-forming portion 30a and core hole-closing portion 30b are made as a unit together with the water outlet 22.
  • This core hole-closing portion 30b is formed in a flat plate with thickness less than the size of the sub-cam chamber forming portion 30a protruding from the rear end wall. Accordingly, the entire length of the cylinder head 1 is prevented from becoming larger size.
  • a sub-bearing portion 12a On the top of the cylinder head 1 is formed a plurality of bearing portions 12, 12 in hollow fashion and on the top of the rear end wall, or the water outlet-mounting surface 19, is disposed a sub-bearing portion 12a. Under the sub-bearing portion 12a of the water outlet-mounting surface 19 is pierced through an oil return hole 23 to return the oil accumulated in the sub-cam chamber 10 into the valve case 9.
  • each oil supply passage 17 is provided with a branch passage 17a facing on each bearing portion 12 or 12a.
  • a plurality of mounting boltholes 24, 24 On the rear end wall are provided a plurality of mounting boltholes 24, 24.
  • the integrated unit of cover member 30 and water outlet 22 is mounted on the rear end wall by tightening mounting bolts 28, 28 into the mounting boltholes 24, 24.
  • a metal gasket 26 On the water outlet mounting surface 19 is placed a metal gasket 26 for sealing.
  • liquid gasket 27 Also on the mated surfaces at the upper part, where chamfering is performed, is applied liquid gasket 27 for sealing.
  • the sub-cam chamber-forming portion 30a of the cover member 30 can form the sub-cam chamber 10 on the outside of the rear end wall.
  • the extension 3a of the camshaft 3 is disposed within this sub-cam chamber 10.
  • the sub-cam chamber-forming portion 30a covers the extension 3a protruded outside from the cylinder head 1.
  • the core hole-closing portion 30b of the cover member 30 closes the core-supporting holes 15, 15 used at the time of casting the valve case 9 and the rear ends of the oil passages 17, 17.
  • the sub-bearing portion 12a for the extension 3a and the sub-cam bracket 2a are satisfactorily lubricated by oil that is sufficiently supplied through the oil passage 17. Besides, it is possible that the oil accumulated in the sub-cam chamber 10 is surely returned through an oil-returning hole 23 into the valve case 9 in the cylinder head 1, so that the oil is smoothly circulated.
  • the separate cover member 30 is mounted on the rear end wall 19 of the cylinder head 1 favorably to form the sub-cam chamber 10. Further, the oil-returning hole 23 is formed through the cylinder head 1 so as to communicate with the inside of this sub-cam chamber 10, As a result, it is possible to surely return the oil through the oil-returning hole 23 into the cylinder head 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
EP20030251474 2002-03-11 2003-03-10 Cylinder head Expired - Lifetime EP1344927B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2002066123A JP3721468B2 (ja) 2002-03-11 2002-03-11 シリンダヘッド構造
JP2002066123 2002-03-11

Publications (3)

Publication Number Publication Date
EP1344927A2 EP1344927A2 (en) 2003-09-17
EP1344927A3 EP1344927A3 (en) 2003-12-10
EP1344927B1 true EP1344927B1 (en) 2007-10-10

Family

ID=27764475

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20030251474 Expired - Lifetime EP1344927B1 (en) 2002-03-11 2003-03-10 Cylinder head

Country Status (3)

Country Link
EP (1) EP1344927B1 (ja)
JP (1) JP3721468B2 (ja)
DE (1) DE60316740T2 (ja)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4386112B2 (ja) 2007-07-20 2009-12-16 トヨタ自動車株式会社 エンジン
US8397689B2 (en) * 2010-05-17 2013-03-19 GM Global Technology Operations LLC Fuel pump tappet/roller follower lubrication
RU2507404C1 (ru) * 2012-06-26 2014-02-20 Открытое акционерное общество "Автодизель" (Ярославский моторный завод) Модуль двигателя внутреннего сгорания, корпус модуля и двигатель внутреннего сгорания

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59211754A (ja) * 1983-05-18 1984-11-30 Honda Motor Co Ltd 内燃機関における燃料ポンプ駆動装置
DE19650246A1 (de) * 1996-12-04 1998-06-10 Bosch Gmbh Robert Von einer Welle eines Verbrennungsmotors angetriebene Kolbenpumpe
DE19701874C5 (de) * 1997-01-21 2006-06-22 Daimlerchrysler Ag Nockenwellenlageranordnung im Zylinderkopf einer Brennkraftmaschine
JP2001304063A (ja) * 2000-04-27 2001-10-31 Suzuki Motor Corp 内燃機関のフューエルポンプ取付構造

Also Published As

Publication number Publication date
DE60316740T2 (de) 2008-07-24
JP3721468B2 (ja) 2005-11-30
JP2003269243A (ja) 2003-09-25
EP1344927A2 (en) 2003-09-17
EP1344927A3 (en) 2003-12-10
DE60316740D1 (de) 2007-11-22

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