EP0228533A2 - Moteur à combustion interne avec au moins un arbre à came en tête - Google Patents

Moteur à combustion interne avec au moins un arbre à came en tête Download PDF

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Publication number
EP0228533A2
EP0228533A2 EP86115234A EP86115234A EP0228533A2 EP 0228533 A2 EP0228533 A2 EP 0228533A2 EP 86115234 A EP86115234 A EP 86115234A EP 86115234 A EP86115234 A EP 86115234A EP 0228533 A2 EP0228533 A2 EP 0228533A2
Authority
EP
European Patent Office
Prior art keywords
cylinder head
screw
camshaft
bearing
cylinder
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
EP86115234A
Other languages
German (de)
English (en)
Other versions
EP0228533B1 (fr
EP0228533A3 (en
Inventor
Max Ruf
Erwin Korostenski
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.)
Audi AG
Original Assignee
Audi AG
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 Audi AG filed Critical Audi AG
Publication of EP0228533A2 publication Critical patent/EP0228533A2/fr
Publication of EP0228533A3 publication Critical patent/EP0228533A3/de
Application granted granted Critical
Publication of EP0228533B1 publication Critical patent/EP0228533B1/fr
Expired 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
    • 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
    • F01L1/053—Camshafts overhead type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00—Metals
    • F05C2201/02—Light metals

Definitions

  • the invention relates to an internal combustion engine according to the preamble of claim 1.
  • a hole is provided in the known design at the points where the optimal position for the cylinder head screws is, which extends through the bearing cover and across the camshaft and opens into a larger diameter hole in the cylinder head . This makes it possible to pre-assemble the cylinder head and the camshaft (s) and screw this unit to the cylinder block.
  • the main disadvantage here is that the fastening screw mentioned is located at a relatively large distance from the camshaft and the bearing cap is also weakened by the through-hole in the area between this screw and the camshaft, so that deformations of the bearing cap due to the action on the camshaft, cannot be excluded from the valve springs and the forces arising from the masses to be accelerated and force the bearing cover to be correspondingly stiff and heavy.
  • the invention has for its object to provide an internal combustion engine according to the preamble of claim 1, in which with simple means an attachment of the cylinder head and camshaft (s) unit is possible on the cylinder block without adversely affecting the camshaft bearing in any way becomes.
  • the unit consisting of the cylinder head and camshaft (s) can be screwed onto the cylinder block as in the prior art, but without having to provide a bore penetrating the bearing cover and the camshaft with the disadvantages described above.
  • the bearing cover can be screwed to the cylinder head in an optimal manner in the immediate vicinity of the camshaft.
  • Cylinder heads are usually made of light metal, which has only a relatively low permissible specific surface pressure. Since the diameter of the axial through bore of the bearing cap screw and thus also the diameter of the head or collar of the cylinder head screw can only be relatively small, it is expedient to screw a threaded sleeve made of steel into the bore of the cylinder head receiving the cylinder head screw, on the end face of which the head or collar the cylinder head screw rests. This distributes the tightening force of the screw over the threads of the sleeve.
  • the cylinder head 1 shown in partial section in FIG. 1 carries a camshaft 2 which is fastened to the cylinder head 1 by bearing shells 3.
  • the bearing surface is formed by two half-shells, of which one half-shell 4 is provided in the cylinder head 1 and the second half-shell 5 in the bearing cover 3.
  • the bearing cover 3 shown in the drawing is attached to the cylinder head 1 on the one hand by a screw 6 which engages in a threaded bore 7 in the cylinder head 1, and on the other hand by a banjo bolt 8 which engages in an internal thread 9 of a through bore 10 in the cylinder head 1.
  • a bore 11 is provided in the cylinder head 1, which serves to receive a cylinder head screw 12, which engages in a threaded bore 13 in the cylinder block 14 and serves to fasten the cylinder head 1 to the cylinder block 14.
  • the inside diameter of the through bore 15 of the hollow screw 8 is dimensioned such that the cylinder head screw 12 can be passed through, so that the cylinder head 1 can be preassembled with the camshaft 2 and this unit can be screwed onto the cylinder block 14 by means of the screws 12.
  • the cylinder head 1 consists in the usual way of a light metal alloy, which allows only a relatively low specific surface pressure. Since the diameter of the through bore 15 of the hollow screw 8 and thus also the diameter of the collar 12a of the cylinder head screw 12 designed as a polygonal collar screw can only be relatively small, excessive surface pressure on the contact surface on the cylinder head 1 would arise when the cylinder head screw 12 was tightened. To avoid this, the bore 11 is provided with an internal thread 18, into which a threaded sleeve 17 made of steel is screwed, on the end face of which the collar 12a of the cylinder head screw 12 is supported. As a result, the tightening force of the screw is distributed over the threads of the threaded sleeve 17, so that the area absorbing this force is increased and the specific surface pressure is reduced.
  • the cylinder head screw 12 is designed as a polygonal collar screw. However, it can also be designed as a differential screw with two threaded sections of different pitch, which cooperate with corresponding internal threads in the cylinder block 14 and in the cylinder head 1, with the different pitches tightening the cylinder head and the cylinder block. Since such a differential screw has no head or collar, the diameter of the through hole 15 and thus the outer diameter of the head of the hollow screw 8 can be kept smaller.
  • the illustrated mounting of the bearing shell 3 by means of a banjo bolt 8 is naturally only necessary where it is desirable to attach the cylinder head 1 to be attached to a position above a camshaft bearing on the cylinder block 14. If the cylinder head screwing is possible at other points, the bearing cover 3 is fastened to the cylinder head 1 in the usual way on both sides with normal screws 6. This can be the case, for example, if two camshafts are provided and the screw connection of the cylinder head 1 to the cylinder block 14 only has to be provided on one side in the area of the bearing shells of the one camshaft, while on the other side the cylinder head screw connection is outside the area of the bearing shells the second camshaft can be provided.
  • the fastening screws 6 and 8 of the bearing shell 3 are provided as close as possible to the camshaft 2 in order to avoid deformations of the bearing shell 3 due to the force acting on the camshaft.
  • the head of the hollow screw 8 is not designed for this purpose as a conventional hexagon, but only provided with radial incisions 16 for engaging the tool, so that the hollow screw 8 can be moved as close as possible to the camshaft 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
EP86115234A 1985-11-26 1986-11-04 Moteur à combustion interne avec au moins un arbre à came en tête Expired EP0228533B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3541700 1985-11-26
DE19853541700 DE3541700A1 (de) 1985-11-26 1985-11-26 Brennkraftmaschine mit mindestens einer obenliegenden nockenwelle

Publications (3)

Publication Number Publication Date
EP0228533A2 true EP0228533A2 (fr) 1987-07-15
EP0228533A3 EP0228533A3 (en) 1988-02-24
EP0228533B1 EP0228533B1 (fr) 1989-01-11

Family

ID=6286834

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86115234A Expired EP0228533B1 (fr) 1985-11-26 1986-11-04 Moteur à combustion interne avec au moins un arbre à came en tête

Country Status (3)

Country Link
EP (1) EP0228533B1 (fr)
JP (1) JPS62131953A (fr)
DE (2) DE3541700A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0246484B1 (fr) * 1986-05-16 1990-08-16 Audi Ag Boulonnage pour la culasse d'un moteur a combustion interne
FR2669677A1 (fr) * 1990-11-28 1992-05-29 Peugeot Culasse de moteur a combustion interne pour la commande de soupape avec linguet et poussoir.
WO1999066176A1 (fr) * 1998-06-12 1999-12-23 Volkswagen Aktiengesellschaft Culasse pour moteurs a combustion interne et son procede de production
EP2341221A1 (fr) * 2009-12-23 2011-07-06 Amadeo Marti Carbonell S.A. Dispositif de montage de culasse d'un moteur

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4416627A1 (de) * 1994-05-11 1995-11-16 Audi Ag Brennkraftmaschine
DE102006034225A1 (de) * 2006-07-25 2008-02-07 GM Global Technology Operations, Inc., Detroit Zylinder für einen Verbrennungsmotor
DE102010051367A1 (de) * 2010-11-13 2012-05-16 Gm Global Technology Operations Llc (N.D.Ges.D. Staates Delaware) Verbrennungskraftmaschine mit obenliegenden Nockenwellen
CN106089474B (zh) * 2016-06-13 2018-10-12 宁波市鄞州德来特技术有限公司 一种汽油机用的气缸及安装气缸盖的装配方法
DE102017118862A1 (de) 2017-08-18 2019-02-21 Man Truck & Bus Ag Vorrichtung zum drehbaren Lagern einer Nockenwelle

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57163141A (en) * 1981-03-31 1982-10-07 Yamaha Motor Co Ltd Cylinder head clamping structure in internal- combustion engine
FR2528511A1 (fr) * 1982-06-14 1983-12-16 Peugeot Chapeau de palier pour arbre a cames en tete de moteur a combustion interne, et moteur correspondant

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0246484B1 (fr) * 1986-05-16 1990-08-16 Audi Ag Boulonnage pour la culasse d'un moteur a combustion interne
FR2669677A1 (fr) * 1990-11-28 1992-05-29 Peugeot Culasse de moteur a combustion interne pour la commande de soupape avec linguet et poussoir.
WO1999066176A1 (fr) * 1998-06-12 1999-12-23 Volkswagen Aktiengesellschaft Culasse pour moteurs a combustion interne et son procede de production
CN1088146C (zh) * 1998-06-12 2002-07-24 大众汽车有限公司 内燃机汽缸头及其制造方法
EP2341221A1 (fr) * 2009-12-23 2011-07-06 Amadeo Marti Carbonell S.A. Dispositif de montage de culasse d'un moteur

Also Published As

Publication number Publication date
EP0228533B1 (fr) 1989-01-11
JPS62131953A (ja) 1987-06-15
DE3541700A1 (de) 1987-05-27
EP0228533A3 (en) 1988-02-24
DE3661753D1 (en) 1989-02-16

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