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US20010009146A1 - Cylinder head for a valve-controlled internal combustion engine - Google Patents

Cylinder head for a valve-controlled internal combustion engine Download PDF

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Publication number
US20010009146A1
US20010009146A1 US09/765,398 US76539801A US2001009146A1 US 20010009146 A1 US20010009146 A1 US 20010009146A1 US 76539801 A US76539801 A US 76539801A US 2001009146 A1 US2001009146 A1 US 2001009146A1
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United States
Prior art keywords
camshaft
bearing
cylinder head
bearing block
bearing sleeve
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
US09/765,398
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US6439180B2 (en
Inventor
Klaus Groeger
Dietmar Schwarzenthal
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.)
Dr Ing HCF Porsche AG
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Dr Ing HCF Porsche 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 Dr Ing HCF Porsche AG filed Critical Dr Ing HCF Porsche AG
Assigned to DR. ING. H.C.F. PORSCHE AG reassignment DR. ING. H.C.F. PORSCHE AG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: GROGER, KLAUS, SCHWARZENTHAL, DIETMAR
Publication of US20010009146A1 publication Critical patent/US20010009146A1/en
Application granted granted Critical
Publication of US6439180B2 publication Critical patent/US6439180B2/en
Assigned to DR. ING. H.C.F. PORSCHE AKTIENGESELLSCHAFT (COMPANY NUMBER 722287) reassignment DR. ING. H.C.F. PORSCHE AKTIENGESELLSCHAFT (COMPANY NUMBER 722287) MERGER (SEE DOCUMENT FOR DETAILS). Assignors: DR. ING. H.C.F. PORSCHE AKTIENGESELLSCHAFT (COMPANY NUMBER 5211)
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02Valve drive
    • F01L1/04Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047Camshafts
    • F01L1/053Camshafts overhead type
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02FCYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00Cylinders; Cylinder heads 
    • F02F1/24Cylinder heads
    • F02F1/26Cylinder heads having cooling means
    • F02F1/36Cylinder heads having cooling means for liquid cooling
    • F02F1/38Cylinder heads having cooling means for liquid cooling the cylinder heads being of overhead valve type
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02Valve drive
    • F01L1/04Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047Camshafts
    • F01L2001/0476Camshaft bearings

Definitions

  • This invention relates to a cylinder head for a valve-controlled internal combustion engine.
  • the European Patent Document EP 0 829 620 A2 discloses that valve-controlling camshafts are mounted by means of bearing sleeves in a cylinder head housing so as to rotate. Furthermore, the. German Patent Document DE 41 43 153 A1 discloses that the relative angular position between camshaft and the camshaft-driving sprocket wheel can be changed by means of so-called axial camshaft adjusters, thus changing the opening and closing times of the valves of the internal combustion engine.
  • cylinder head housings of engines have bearing blocks for the purpose of mounting the camshafts.
  • Said bearing blocks exhibit a bearing block width that is decreased in segments owing to the screw-in openings for fastening the cylinder head housing to the cylinder head.
  • An objective of the present invention is to provide for such a cylinder head housing a compact camshaft mounting, which can simultaneously provide the force-fed oil for the camshaft adjuster, arranged at the camshaft.
  • a cylinder head housing in which there are bearing blocks for the inlet or outlet camshaft, at least one camshaft has a camshaft adjuster, by means of which the position of the drive wheel of the camshaft can be changed relative to the axis of rotation of the camshaft.
  • At least the bearing block which is provided next to the camshaft adjuster and is intended for the camshaft, exhibits a segment, whose width is reduced owing to a recess for the screw connection of the cylinder head housing.
  • the bearing site arranged next to the camshaft adjuster, exhibits a bearing sleeve for the camshaft, in such a manner that the segment of the bearing site that is provided with a reduced bearing block width is expanded to the actual bearing block width, and the sleeve exhibits openings to supply oil for the camshaft adjuster.
  • the bearing sleeve is provided on its two face sides with a collar, which serves, on the one hand, the axial mounting of the camshaft and, on the other hand, the fixing in position of the bearing sleeve in the bearing block.
  • the bearing sleeve has on its peripheral surface openings, which serve to feed force-fed oil to a camshaft adjuster, fastened to the camshaft.
  • FIG. 1 illustrates the cylinder head housing of an internal combustion engine and part of the camshaft.
  • FIG. 2 illustrates a detail of the cylinder head housing without the camshaft.
  • FIG. 3 shows a front view of the sleeve.
  • FIG. 4 shows a side view of the sleeve, of which its cross section is depicted to some extent.
  • FIG. 5 shows a sectional view along line V in FIG. 4.
  • FIG. 6 shows a sectional view along line VI in FIG. 4.
  • FIG. 7 shows a sectional view along line VII in FIG. 4.
  • FIG. 8 shows a perspective view of the bearing sleeve.
  • the camshaft 12 which is mounted in a cylinder head housing 10 so as to rotate, has two pairs of different cams 14 and 16 , which define the valve lift and the opening and closing times of the inlet valves by way of bucket tappets (not illustrated), guided in the openings 17 .
  • the camshaft 12 has on its outer face a sprocket wheel 18 , which drives the camshaft 12 and is a component of an axial. camshaft adjuster 22 , fastened to the camshaft 12 by way of a screw bolt 20 .
  • the construction of the camshaft adjuster 22 is known from the state of the art and is described below only in connection with those features that are essential to the invention.
  • the cylinder head housing 10 exhibits several bearing blocks 24 , 24 ′, in which the camshaft 12 can be rotated.
  • the cylinder head housing 10 also has screw-in openings 26 for the purpose of fastening the cylinder head housing 10 to the cylinder head.
  • the bearing block 24 ′ accommodates a bearing sleeve 30 , which exercises the functions, described in detail below.
  • the bearing sleeve 30 has on its outer face two collars 32 and 34 .
  • the collar 32 has two radially arranged recesses 36 , which correspond in such a manner with the shoulders of the bearing block 24 ′ that the bearing sleeve 30 is held twist-proof in the recess 38 for accommodating the camshaft 12 .
  • the bearing sleeve 30 On a radial bearing surface 40 , the bearing sleeve 30 includes two pairs of openings 42 and 44 , by way of which force-fed oil can be guided to an internal final control member 46 of the camshaft adjuster 22 .
  • the force-fed oil is fed by way of a control valve 48 over force-fed oil lines 50 and 52 , over radially revolving grooves 54 and 56 formed in the camshaft 12 , and over boreholes 58 and 60 , arranged in the camshaft 12 , to the two pressure chambers 62 and 64 , with whose aid the internal final control member 46 and the position of the sprocket wheel 18 can be adjusted, as desired, with respect to the position of the cams 14 , 16 .
  • the bearing sleeve 30 arranged in the bearing block 24 ′, enlarges the bearing block in the area of the radial recess 28 of the bearing block 24 ′ so that force-fed oil can be fed simultaneously to the camshaft adjuster 22 at this bearing site, arranged close to the camshaft adjuster 22 . Furthermore, the bearing sleeve 30 serves to mount the camshaft 12 axially, since on the one side of the bearing block 24 ′ the camshaft adjuster 22 rests flush against the collar 34 of the bearing sleeve 30 ; and on the other side of the bearing block 24 ′ the collar 32 of the bearing sleeve 30 rests flush against a collar 66 of the camshaft 12 .
  • the bearing points of the camshaft 12 are designed as two parts, where the non-illustrated upper bearing shells are connected with corresponding screw connections to the bearing blocks 24 , 24 ′.
  • the borehole 68 provided in the bearing sleeve 30 , serves to supply lubrication for the camshaft bearing, whereas the oil channels 70 , arranged in the cylinder head housing 10 , are provided to supply the bucket tappets with lubricating oil.

Landscapes

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

Abstract

A cylinder head for a valve-controlled internal combustion engine with a cylinder head housing, in which there are bearing blocks for the inlet or outlet camshaft. At least one camshaft has a camshaft adjuster, by way of which the position of the drive wheel of the camshaft can be changed relative to the axis of rotation of the camshaft. At least the bearing block, which is provided next to the camshaft adjuster and is intended for the camshaft, exhibits a segment, whose width is reduced owing to a recess for the screw connection of the cylinder head housing. The bearing site, arranged next to the camshaft adjuster, provides a bearing sleeve for the camshaft, in such a manner that the segment of the bearing block that is provided with a reduced bearing block width is expanded to the actual bearing block width. The sleeve exhibits openings to supply oil for the camshaft adjuster. Force-fed oil can be fed to the camshaft adjuster by way of the bearing sleeve over the bearing block, which is arranged next to the camshaft adjuster, despite the bearing block's recesses, which reduce its bearing width.

Description

    BACKGROUND AND SUMMARY OF THE INVENTION
  • This application claims the priority of German Application 10002512.9, filed Jan. 21, 2000, the disclosure of which is expressly incorporated by reference herein. [0001]
  • This invention relates to a cylinder head for a valve-controlled internal combustion engine. [0002]
  • The European Patent Document EP 0 829 620 A2 discloses that valve-controlling camshafts are mounted by means of bearing sleeves in a cylinder head housing so as to rotate. Furthermore, the. German Patent Document DE 41 43 153 A1 discloses that the relative angular position between camshaft and the camshaft-driving sprocket wheel can be changed by means of so-called axial camshaft adjusters, thus changing the opening and closing times of the valves of the internal combustion engine. [0003]
  • Furthermore, it is known that cylinder head housings of engines have bearing blocks for the purpose of mounting the camshafts. Said bearing blocks exhibit a bearing block width that is decreased in segments owing to the screw-in openings for fastening the cylinder head housing to the cylinder head. [0004]
  • An objective of the present invention is to provide for such a cylinder head housing a compact camshaft mounting, which can simultaneously provide the force-fed oil for the camshaft adjuster, arranged at the camshaft. [0005]
  • This problem is solved by a cylinder head housing, in which there are bearing blocks for the inlet or outlet camshaft, at least one camshaft has a camshaft adjuster, by means of which the position of the drive wheel of the camshaft can be changed relative to the axis of rotation of the camshaft. [0006]
  • At least the bearing block, which is provided next to the camshaft adjuster and is intended for the camshaft, exhibits a segment, whose width is reduced owing to a recess for the screw connection of the cylinder head housing. The bearing site, arranged next to the camshaft adjuster, exhibits a bearing sleeve for the camshaft, in such a manner that the segment of the bearing site that is provided with a reduced bearing block width is expanded to the actual bearing block width, and the sleeve exhibits openings to supply oil for the camshaft adjuster. [0007]
  • The features, cited in the dependent claims, disclose other advantageous designs and improvements of the cylinder head, according to the invention. [0008]
  • The bearing sleeve is provided on its two face sides with a collar, which serves, on the one hand, the axial mounting of the camshaft and, on the other hand, the fixing in position of the bearing sleeve in the bearing block. [0009]
  • The bearing sleeve has on its peripheral surface openings, which serve to feed force-fed oil to a camshaft adjuster, fastened to the camshaft. [0010]
  • One embodiment of the invention is depicted in the drawings and is explained in detail below. [0011]
  • Other objects, advantages and novel features of the present invention will become apparent from the following detailed description of the invention when considered in conjunction with the accompanying drawings. [0012]
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 illustrates the cylinder head housing of an internal combustion engine and part of the camshaft. [0013]
  • FIG. 2 illustrates a detail of the cylinder head housing without the camshaft. [0014]
  • FIG. 3 shows a front view of the sleeve. [0015]
  • FIG. 4 shows a side view of the sleeve, of which its cross section is depicted to some extent. [0016]
  • FIG. 5 shows a sectional view along line V in FIG. 4. [0017]
  • FIG. 6 shows a sectional view along line VI in FIG. 4. [0018]
  • FIG. 7 shows a sectional view along line VII in FIG. 4. [0019]
  • FIG. 8 shows a perspective view of the bearing sleeve. [0020]
  • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
  • As shown in FIG. 1, the [0021] camshaft 12, which is mounted in a cylinder head housing 10 so as to rotate, has two pairs of different cams 14 and 16, which define the valve lift and the opening and closing times of the inlet valves by way of bucket tappets (not illustrated), guided in the openings 17.
  • The [0022] camshaft 12 has on its outer face a sprocket wheel 18, which drives the camshaft 12 and is a component of an axial. camshaft adjuster 22, fastened to the camshaft 12 by way of a screw bolt 20. The construction of the camshaft adjuster 22 is known from the state of the art and is described below only in connection with those features that are essential to the invention. The cylinder head housing 10 exhibits several bearing blocks 24, 24′, in which the camshaft 12 can be rotated. The cylinder head housing 10 also has screw-in openings 26 for the purpose of fastening the cylinder head housing 10 to the cylinder head. Owing to the spatial conditions governing the design in the cylinder head housing 10, it is advantageous to provide the bearing blocks 24, 24′ in the area of the screw-in openings 26 for the cylinder head screws with a radial recess 28, so that the non-illustrated cylinder head screws can be pushed into the screw-in openings 26 and screwed to the cylinder head.
  • The [0023] bearing block 24′, arranged next to the camshaft adjuster 22, accommodates a bearing sleeve 30, which exercises the functions, described in detail below. As shown in FIGS. 3-8, the bearing sleeve 30 has on its outer face two collars 32 and 34. The collar 32 has two radially arranged recesses 36, which correspond in such a manner with the shoulders of the bearing block 24′ that the bearing sleeve 30 is held twist-proof in the recess 38 for accommodating the camshaft 12. On a radial bearing surface 40, the bearing sleeve 30 includes two pairs of openings 42 and 44, by way of which force-fed oil can be guided to an internal final control member 46 of the camshaft adjuster 22. The force-fed oil is fed by way of a control valve 48 over force-fed oil lines 50 and 52, over radially revolving grooves 54 and 56 formed in the camshaft 12, and over boreholes 58 and 60, arranged in the camshaft 12, to the two pressure chambers 62 and 64, with whose aid the internal final control member 46 and the position of the sprocket wheel 18 can be adjusted, as desired, with respect to the position of the cams 14, 16.
  • The [0024] bearing sleeve 30, arranged in the bearing block 24′, enlarges the bearing block in the area of the radial recess 28 of the bearing block 24′ so that force-fed oil can be fed simultaneously to the camshaft adjuster 22 at this bearing site, arranged close to the camshaft adjuster 22. Furthermore, the bearing sleeve 30 serves to mount the camshaft 12 axially, since on the one side of the bearing block 24′ the camshaft adjuster 22 rests flush against the collar 34 of the bearing sleeve 30; and on the other side of the bearing block 24′ the collar 32 of the bearing sleeve 30 rests flush against a collar 66 of the camshaft 12. The bearing points of the camshaft 12 are designed as two parts, where the non-illustrated upper bearing shells are connected with corresponding screw connections to the bearing blocks 24, 24′.
  • The [0025] borehole 68, provided in the bearing sleeve 30, serves to supply lubrication for the camshaft bearing, whereas the oil channels 70, arranged in the cylinder head housing 10, are provided to supply the bucket tappets with lubricating oil.
  • The foregoing disclosure has been set forth merely to illustrate the invention and is not intended to be limiting. Since modifications of the disclosed embodiments incorporating the spirit and substance of the invention may occur to persons skilled in the art, the invention should be construed to include everything within the scope of the appended claims and equivalents thereof. [0026]

Claims (7)

What is claimed is:
1. A cylinder head for a valve-controlled internal combustion engine comprising:
a cylinder head housing, having bearing blocks for a camshaft,
the camshaft including a camshaft adjuster, which changes a position of a drive wheel of the camshaft relative to the axis of rotation of the camshaft, and
at least one bearing block, being arranged adjacent to the camshaft adjuster and being intended for the camshaft, including a segment, which has a reduced width due to a recess for a screw connection of the cylinder head housing,
wherein the bearing block is arranged adjacent to the camshaft adjuster providing a bearing sleeve for the camshaft, so that the segment of the bearing block with the reduced width is expanded to the actual bearing block width, and
wherein the bearing sleeve includes openings to supply oil for the camshaft adjuster.
2. A cylinder head according to
claim 1
, wherein the bearing sleeve includes on each end a collar, serving to axially mount the camshaft and the bearing sleeve.
3. A cylinder head according to
claim 1
, wherein at least one collar on the bearing sleeve includes recesses, interacting with the shoulders of the bearing block so that the bearing sleeve is fixed and does not rotate.
4. A cylinder head according to
claim 2
, wherein at least one of said collars includes recesses, interacting with the shoulders of the bearing block so that the bearing sleeve is fixed and does not rotate.
5. A bearing block for a camshaft with a camshaft adjuster, said bearing block being arranged adjacent the camshaft adjuster and including a reduced width segment and a bearing sleeve for the camshaft to expand the bearing block in an area of the reduced width segment, wherein the bearing sleeve includes openings to supply oil for the camshaft adjuster.
6. A bearing block according to
claim 5
, wherein the bearing sleeve includes on each end a collar to axially mount the camshaft and to mount the bearing sleeve to the bearing block.
7. A method of making a cylinder head for a valve-controlled internal combustion engine having at least one camshaft and a camshaft adjuster to axially position a drive wheel of the camshaft, comprising the acts of:
providing the cylinder head housing having bearing blocks for the camshaft located adjacent the camshaft adjuster, and a recess for a screw connection in the cylinder head housing, wherein the bearing blocks include a reduced width segment to accommodate the recess.
expanding the reduced width segment of the bearing block by providing a bearing sleeve for the camshaft at the bearing blocks located adjacent the camshaft adjusters, wherein the bearing sleeve includes openings to supply oil for the camshaft adjuster.
US09/765,398 2000-01-21 2001-01-22 Cylinder head for a valve-controlled internal combustion engine Expired - Fee Related US6439180B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10002512A DE10002512A1 (en) 2000-01-21 2000-01-21 Cylinder head for a valve-controlled internal combustion engine
DE10002512 2000-01-21
DEDE10002512.9 2000-01-21

Publications (2)

Publication Number Publication Date
US20010009146A1 true US20010009146A1 (en) 2001-07-26
US6439180B2 US6439180B2 (en) 2002-08-27

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US09/765,398 Expired - Fee Related US6439180B2 (en) 2000-01-21 2001-01-22 Cylinder head for a valve-controlled internal combustion engine

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EP (1) EP1118762A3 (en)
DE (1) DE10002512A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10135146A1 (en) 2001-07-19 2003-01-30 Porsche Ag Device for the relative change in the angle of rotation of a camshaft
DE102004043935B4 (en) * 2004-09-11 2016-10-20 Audi Ag Device in the cylinder head of a valve-controlled internal combustion engine
DE102004051424B4 (en) * 2004-10-22 2017-03-30 Schaeffler Technologies AG & Co. KG Device for adjusting the camshaft of an internal combustion engine and assembly tool
DE102008039038B4 (en) 2008-08-21 2021-01-28 Schaeffler Technologies AG & Co. KG Camshaft adjuster
DE202008018657U1 (en) 2008-08-21 2017-11-20 Schaeffler Technologies AG & Co. KG Phaser
EP2589729B1 (en) 2011-11-04 2014-07-16 Hörmann Kg Amshausen Garage door handle creating an electrical signal for actuating a side section door

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04191406A (en) * 1990-11-26 1992-07-09 Atsugi Unisia Corp Valve timing control device for internal combustion engine
DE4116944C2 (en) * 1991-05-24 1997-05-22 Daimler Benz Ag Cylinder head for a multi-cylinder internal combustion engine
DE4143153A1 (en) 1991-12-28 1993-07-01 Bosch Gmbh Robert HYDRAULIC CONTROL DEVICE
US5522354A (en) * 1993-10-29 1996-06-04 Yamaha Hatsudoki Kabushiki Kaisha Valve mechanism for internal combustion engine
JP2924777B2 (en) * 1996-04-08 1999-07-26 トヨタ自動車株式会社 Variable valve timing mechanism for internal combustion engine
DE19637416A1 (en) 1996-09-13 1998-03-19 Bayerische Motoren Werke Ag Adjustable camshaft for a valve-controlled reciprocating machine, in particular an internal combustion engine
JPH10184323A (en) * 1996-12-26 1998-07-14 Yamaha Motor Co Ltd Four cycle engine
DE19747035A1 (en) * 1997-10-24 1999-04-29 Daimler Chrysler Ag Variable valve timing
DE19747244A1 (en) * 1997-10-27 1999-04-29 Schaeffler Waelzlager Kg Cylinder head for internal combustion engine
JP4036401B2 (en) * 1998-03-27 2008-01-23 ヤマハ発動機株式会社 4-cycle engine with variable valve timing system
JP3755312B2 (en) * 1998-09-30 2006-03-15 スズキ株式会社 Cam bearing structure of internal combustion engine

Also Published As

Publication number Publication date
EP1118762A3 (en) 2002-08-14
DE10002512A1 (en) 2001-07-26
US6439180B2 (en) 2002-08-27
EP1118762A2 (en) 2001-07-25

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Effective date: 20100827