EP0688946B1 - Cylinder head layout of an internal combustion engine - Google Patents

Cylinder head layout of an internal combustion engine Download PDF

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Publication number
EP0688946B1
EP0688946B1 EP95107276A EP95107276A EP0688946B1 EP 0688946 B1 EP0688946 B1 EP 0688946B1 EP 95107276 A EP95107276 A EP 95107276A EP 95107276 A EP95107276 A EP 95107276A EP 0688946 B1 EP0688946 B1 EP 0688946B1
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EP
European Patent Office
Prior art keywords
cylinder
arrangement according
housing
head arrangement
bearing
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
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EP95107276A
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German (de)
French (fr)
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EP0688946A1 (en
Inventor
Roland Hauf
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Dr Ing HCF Porsche AG
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Dr Ing HCF Porsche AG
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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
    • F02F1/00—Cylinders; Cylinder heads 
    • 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
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F1/42—Shape or arrangement of intake or exhaust channels in cylinder heads
    • F02F1/4214—Shape or arrangement of intake or exhaust channels in cylinder heads specially adapted for four or more valves per cylinder
    • 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
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B1/00—Engines characterised by fuel-air mixture compression
    • F02B1/02—Engines characterised by fuel-air mixture compression with positive ignition
    • F02B1/04—Engines characterised by fuel-air mixture compression with positive ignition with fuel-air mixture admission into cylinder
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
    • F02B2275/18—DOHC [Double overhead camshaft]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
    • 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
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/02—Cylinders; Cylinder heads  having cooling means
    • F02F1/10—Cylinders; Cylinder heads  having cooling means for liquid cooling
    • F02F2001/104—Cylinders; Cylinder heads  having cooling means for liquid cooling using an open deck, i.e. the water jacket is open at the block top face
    • 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
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F2001/244—Arrangement of valve stems in cylinder heads
    • F02F2001/245—Arrangement of valve stems in cylinder heads the valve stems being orientated at an angle with the cylinder axis

Definitions

  • the invention relates to a cylinder head arrangement according to the preamble of Claim 1.
  • DE 41 16 942 C1 is a generic cylinder head arrangement shown in which a basic housing is placed on a cylinder block and with this is screwed.
  • the basic housing has raised outer walls which has a hood-like lid.
  • the interior is a tappet housing at a distance from the outer walls arranged, which is screwed to the basic housing.
  • the Cup tappet housing is formed in several parts and has in one
  • the basic element is the guides of the valve cups and the lower half of the bearing block for storing the camshafts. On this lower half of the pedestal separate upper bearing block halves are attached and screwed to the lower parts.
  • a cylinder head is known in which the mounted on the cylinder block Basic housing in one piece with bucket tappet guide and the lower parts of Camshaft bearings is formed. On this basic housing is a Cylinder head cover bearing upper parts attached.
  • the invention is therefore based on the object of a generic To improve cylinder head assembly in that both a high strength Material structure in particular of the basic housing can be achieved that the entire cylinder head assembly has a high overall rigidity and is easy to manufacture and assemble.
  • the Basic housing of the cylinder head assembly can be advantageously in Create permanent mold, using only those necessary for the water flow Channels (with water-cooled cylinder head) through molding sand or similar cast or Molding techniques must be created. At the same time it results from this three-part design of the cylinder head arrangement only a single one to the outside separating plane to be sealed, so that an oil leak with comparatively simple Means to prevent.
  • the overall rigidity of the cylinder head assembly in the assembled state can be increase in an advantageous manner if the bearing blocks each with the adjacent outer walls are connected, d. H. if the top Bearing block halves with the respective adjacent outer wall of the Cylinder head cover and the lower half of the bearing block with the adjacent outer wall of the basic housing are connected.
  • the assembly of the cylinder head assembly can be considerably simplified if at least the screw connection between the cylinder head cover and the basic housing in the area of the cylinder bores by screwing the Bearing block halves done. This results in a significant reduction in Screwing points. At the same time, the width of the Cylinder head arrangement is reduced, since there is no one for this outdoors Connection required screw connections are more necessary.
  • the arrangement of the individual bearing blocks is advantageously carried out in the area for chain boxes required to drive the camshafts.
  • the holes of the Camshaft bearings can then from the opposite end of the Cylinder head assembly are made so that these openings in the Front side when mounting the camshafts as an engagement for one Can be used to depress the camshafts.
  • connection between the tappet housing and the basic housing is made Advantageously in a parting plane, in the favor of manufacturing technology Way channels for the oil guide can be poured. With that the required drilling effort for the oil guide significantly reduced. over these cast oil channels can be lubricated with just a few holes Valve cups and the camshaft.
  • Both manufacture and sealing of the cylinder head arrangement can be improve if the shaft opening into the combustion chamber for receiving a Spark plug or an injector extended by a sleeve and is sealed between the tappet housing and cylinder head assembly is inserted.
  • This sleeve can be easily and easily installed insert and seal in an annular extension in the tappet housing.
  • An internal combustion engine has one placed on a cylinder block 1 Cylinder head arrangement, the housing of three housing components is composed, a basic housing 2, a tappet housing 3 and a cylinder head cover 4.
  • the internal combustion engine is in this Embodiment in the form of a cylinder bank of a six-cylinder Boxer engine with four valves per cylinder and two overhead Camshafts shown.
  • This internal combustion engine accordingly has Cylinder bank three cylinder bores 5, which according to the one selected in FIG. 1 Representation as left, middle and right cylinder or corresponding Cylinder bore 5 are designated.
  • Each of these cylinder bores 5 is about four disc springs (not shown) guided in valve guides 6 (two Intake valves, two exhaust valves) and corresponding gas exchange channels 7 controlled.
  • the gas exchange channels 7 and valve guides 6 are in one Base block 8 of the basic housing 2 integrated, on the front side a chain case 9 connects. This serves to accommodate drive means, not shown for the timing drive. Go from the basic block 8 of the basic housing 2 Outer walls 10, 11 and 12 made opposite an inner support surface 13 are pulled up to a parting plane T-T.
  • the chain case 9 is from Enclosed outer walls 14, which also extend to the parting plane T-T and connect to the walls 10 and 12 of the base block 8.
  • each shaft 15 is of an annular shape poured recess 17 surround the part of the oil guide of the Cylinder head is.
  • the annular recess 17 in the area of the left cylinder is connected to a likewise cast-in longitudinal groove 18, which does not refer to illustrated manner is connected to the oil supply to the cylinder head assembly. This longitudinal groove 18 runs approximately parallel to the central longitudinal plane M.
  • Die are annular depressions in the area of the middle and right cylinder connected by a further cast longitudinal groove 19, the is also connected to the oil supply to the cylinder head assembly and approximately runs parallel to the median longitudinal plane M.
  • the annular depressions 17 and the longitudinal grooves 18 and 19 are each surrounded by a sealing web 20, whose sealing surface is part of the support surface 13.
  • the annular depressions 17th are each within one through the passage openings of the valve guides 6 in the base 13 formed rectangle, the shorter sides parallel to the median longitudinal plane M.
  • the valve guides 6 are each against this Inclined plane and arranged in two rows.
  • the basic housing 2 is screwed to the cylinder block 1 in two Rows, i.e. the screw connections are each in a plane E1 or E2 parallel to the median longitudinal plane M.
  • the screw connections 21 between Basic housing 2 and cylinder block 1 and the following in more detail Further screw connections explained are here for the sake of a better overview only represented by their holes.
  • There are 5 for each cylinder bore four screw connections 21 are provided, the connecting lines of which are a rectangle form, which includes the valve guides 6. That through the four screw connections 21 rectangle formed per cylinder has its shorter sides parallel to Median longitudinal plane M.
  • each camshaft or Valve row four lower bracket halves 22 arranged. Each lie the lower half of the bearing block of the two rows of valves opposite each other.
  • a first pair of bearing blocks 22 is arranged in the area of the chain case 9, a second pair of bearing blocks 22 is located in the area of the opposite outer or end wall 11 and two further pairs of Bearing block halves 22 are located between the left and middle cylinders or between the middle and right cylinder.
  • These two pairs of Bearing block halves 22 are each between two adjacent ones Screws 21 of the adjacent cylinder bores 5 are arranged.
  • In each of the lower bracket halves 22 are two holes 23 for Screw connection with the upper ones described in more detail below Bearing block halves attached.
  • holes 23 are arranged so that the camshaft to be inserted lies between them.
  • Four rows or Levels of screw connections or bores 23 formed in the in Fig. 1st Alignment of the basic housing 2 shown from top to bottom with B1 to B4 are designated.
  • Hole level B1 is above level E1 the screw connections 21 and the bore level B2 lie below this Level.
  • Both hole levels B1 and B2 lie above the middle level M.
  • the hole planes of the lower row of bearing block halves are B3 and B4 referred to, the bore level B3 is above and the bore level B4 below the level E2 of the screw connections 21.
  • Each between the screw connections 21 lying in a plane E1 or E2 Cylinder bore 5 is a further screw 24, through which Bucket housing 3 and the basic housing 2 connected to each other will.
  • the screw connections 24 of the tappet housing 2 are in two levels T1 and T2 parallel to the central level M.
  • the upper level T1 lies between the bore plane B1 facing the outer wall 10 and the Level E1 of the screw connections 21, the lower level T2 lies between the lower level E2 of the screw connections 21 and that of the outer wall 12 facing bore plane B4 of the bearing block halves 22.
  • a third row of Screws 25 for the tappet housing 3 is in the Central longitudinal plane M.
  • additional screw connections 26 are provided in the area of the sealing webs 20.
  • the tappet housing 2 is on the support surface 13 of the basic housing 2 its base 27 so that the bores or Continue screw connections 24 to 26 accordingly.
  • the tappet housing 2 includes 5 four tappet guides 28 per cylinder bore, which with the respective axes of the valve guides are aligned.
  • the four tappet guides 28 per cylinder are interconnected.
  • Each of this group of four Cup tappet guides 28 are connected to the adjacent group of webs 29 Bucket guides 28 connected so that the whole bucket housing is formed in one piece.
  • a bore 30 is provided with the shaft 15 is aligned.
  • Each of these holes is on the top of the Cup tappet housing 2 surrounded by an annular extension 31.
  • the annular groove 32 in the area of the left cylinder bore is connected to a longitudinal groove 33, which in a longitudinal web 34 is arranged and with the longitudinal groove 18 in the basic housing 2nd forms an oil channel.
  • the ring grooves 32 in the middle and right Cylinder bores are also connected to one another via a longitudinal groove 34, which interacts with the corresponding longitudinal groove 19 in the basic housing 2 and is cast into a longitudinal web 36.
  • the oil supply to the Bucket tappet guides are made via oblique bores 46 which extend into the annular groove 32 flow out.
  • the cylinder head arrangement is covered by a cylinder head cover 4 completed in the area of the parting plane T-T on the outer walls 10 to 12 and 14 of the base housing 2 is placed and the bucket tappet housing 3 covered.
  • the cylinder head cover contains three pairs of top Bearing block halves 37, each with the between the left and middle Cylinders, the middle and right cylinders and those in the area of the right End and outer wall 11 arranged lower bracket halves 22nd work together. These upper bracket halves 37 each go from one Outer wall of the cylinder head cover 24 or are integral with this connected.
  • the screw connection between basic housing 2 and Cylinder head cover 4 takes place in the area of the base block 8 through the Screw connection 23 of the bracket halves.
  • the camshafts 43 are supported in the area of the chain case 9 the two lower bracket halves 22, on the separate Single bearing block upper parts 44 are placed. These separate headstock upper parts 44 are wider (viewed in the axial direction) than the corresponding lower one Bearing block half 22 and take over the axial guidance of the camshaft. Thereby only needs a separate upper bearing part for the axial guidance per camshaft to be edited. Due to the separate top bracket parts at Assembly at the same time on the chain case side, depressing the Camshafts against the action of the valve springs, not shown. On the opposite end face 11 of the basic housing or in the corresponding bores of the cylinder head cover are mounting holes 45 introduced, on the one hand for machining the bearing holes and for others to depress the camshafts during assembly or create the necessary space.

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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)
  • Lubrication Of Internal Combustion Engines (AREA)

Description

Die Erfindung betrifft eine Zylinderkopfanordnung nach dem Oberbegriff des Patentanspruches 1.The invention relates to a cylinder head arrangement according to the preamble of Claim 1.

In der DE 41 16 942 C1 ist eine gattungsgemäße Zylinderkopfanordnung dargestellt, bei der ein Grundgehäuse auf einen Zylinderblock aufgesetzt und mit diesem verschraubt ist. Das Grundgehäuse hat hochgezogene Außenwände, auf die ein haubenartiger Deckel aufgesetzt ist. In dem durch den Zylinderkopfdeckel und die hochgezogenen Außenwände des Grundgehäuses gebildeten Innenraum ist ein Tassenstößelgehäuse mit Abstand zu den Außenwänden angeordnet, das mit dem Grundgehäuse verschraubt ist. Das Tassenstößelgehäuse ist mehrteilig ausgebildet und weist in einem Grundelement die Führungen der Ventiltassen und die unteren Lagerbockhälften zur Lagerung der Nockenwellen auf. Auf diese unteren Lagerbockhälften sind separate obere Lagerbockhälften aufgesetzt und mit den Unterteilen verschraubt.DE 41 16 942 C1 is a generic cylinder head arrangement shown in which a basic housing is placed on a cylinder block and with this is screwed. The basic housing has raised outer walls which has a hood-like lid. In the through the cylinder head cover and the raised outer walls of the basic housing The interior is a tappet housing at a distance from the outer walls arranged, which is screwed to the basic housing. The Cup tappet housing is formed in several parts and has in one The basic element is the guides of the valve cups and the lower half of the bearing block for storing the camshafts. On this lower half of the pedestal separate upper bearing block halves are attached and screwed to the lower parts.

Aus dem Volvo Service Manuel Nr. TP 317 14/2, Seite 11, ist für den Motor Typ B6304 ein Zylinderkopf bekannt, bei dem das auf den Zylinderblock aufgesetzte Grundgehäuse einstückig mit Tassenstößelführung und den Unterteilen von Nockenwellenlagern ausgebildet ist. Auf dieses Grundgehäuse ist ein die Lageroberteile tragender Zylinderkopfdeckel aufgesetzt.From Volvo Service Manuel No. TP 317 14/2, page 11, is for the engine type B6304 a cylinder head is known in which the mounted on the cylinder block Basic housing in one piece with bucket tappet guide and the lower parts of Camshaft bearings is formed. On this basic housing is a Cylinder head cover bearing upper parts attached.

Zur Erzielung eines optimalen, insbesondere brennraumseitig hochfesten Werkstoffgefüges, ist es wünschenswert, dieses durch ein weitgehend hinterschneidungsfreies Gußverfahren zu erzielen, wie es beispielsweise mit dem gattungsbildenden Stand der Technik möglich ist. Die Ausbildung des mit dem Grundgehäuse verschraubten Tassenstößelgehäuses gemäß Stand der Technik erfordert dabei jedoch einen hohen Montageaufwand, bedingt durch die Vielzahl der Verschraubungen. Weiterhin ergibt sich ein hoher Fertigungs- und Reparaturaufwand infolge der Lagerung der Nockenwellen im Tassenstößelgehäuse, da diese Lagerbohrungen bei der Fertigung einen festen Bezug zwischen Tassenstößelgehäuse und Grundgehäuse erfordern. To achieve an optimal, especially high-strength combustion chamber side Material structure, it is desirable to do this by a largely to achieve undercut-free casting process, such as with the generic state of the art is possible. Training the with the Basic housing screwed bucket tappet housing according to the prior art however, requires a lot of assembly work, due to the large number the screw connections. Furthermore, there is a high manufacturing and Repair effort due to the storage of the camshafts in Bucket tappet housings, as these bearing bores are fixed during manufacture Require relation between bucket tappet housing and basic housing.

Demzufolge ist auch bei der Reparatur bzw. beim Austausch eine feste Zuordnung zwischen Tassenstößelgehäuse und Grundgehäuse erforderlich.As a result, repairs and replacements are also fixed Assignment between bucket tappet housing and basic housing required.

Der Erfindung liegt daher die Aufgabe zugrunde, eine gattungsgemäße Zylinderkopfanordnung dahingehend zu verbessern, daß sowohl ein hochfestes Werkstoffgefüge insbesondere des Grundgehäuses erzielbar ist, daß die gesamte Zylinderkopfanordnung eine hohe Gesamtsteifigkeit aufweist und einfach zu fertigen und zu montieren ist.The invention is therefore based on the object of a generic To improve cylinder head assembly in that both a high strength Material structure in particular of the basic housing can be achieved that the entire cylinder head assembly has a high overall rigidity and is easy to manufacture and assemble.

Diese Aufgabe wird erfindungsgemäß mit den kennzeichnenden Merkmalen des Patentanspruches 1 gelöst.This object is achieved with the characterizing features of Claim 1 solved.

Weitere vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus den Unteransprüchen und der Beschreibung.Further advantageous embodiments of the invention result from the Subclaims and the description.

Wenn bei einer derartigen Zylinderkopfanordnung die Lagerung der Nockenwellen zwischen Grundgehäuse und Zylinderkopfdeckel erfolgt und das Tassenstößelgehäuse einstückig ausgebildet ist und nur zur Führung der Ventiltassen dient, ergeben sich einfach zu fertigende, leicht zu montierende Bauelemente, die im montierten Zustand eine hohe Gesamtsteifigkeit aufweisen. Der Zusammenbau der drei Einzelelemente Grundgehäuse, Tassenstößelführung und Zylinderkopfdeckel kann dabei mit einer geringen Zahl von Verschraubungen erfolgen. Dadurch ergibt sich gleichzeitig eine sehr kompakte Ausbildung der Zylinderkopfanordnung, die für einen Zylinderkopf mit obenliegenden Nockenwellen und Tassenstößeln eine relativ geringe Bauhöhe und vor allem eine geringe Baubreite aufweist. Bei einer derartigen Ausbildung der Zylinderkopfanordnung können der Zylinderkopfdeckel und das Tassenstößelgehäuse beispielsweise als Druckgußbauteile gefertigt werden. Das Grundgehäuse der Zylinderkopfanordnung läßt sich auf vorteilhafte Weise im Kokillenguß erstellen, wobei nur noch die für die Wasserführung erforderlichen Kanäle (bei wassergekühltem Zylinderkopf) durch Formsand oder ähnliche Guß- bzw. Formtechniken erstellt werden müssen. Gleichzeitig ergibt sich durch diese dreiteilige Ausbildung der Zylinderkopfanordnung nur eine einzige nach außen abzudichtende Trennebene, so daß ein Ölaustritt mit vergleichsweise einfachen Mitteln zu verhindern ist.If with such a cylinder head arrangement, the storage of Camshafts between the basic housing and the cylinder head cover occur and that Bucket housing is formed in one piece and only for guiding the Serves valve cups, result in easy to manufacture, easy to assemble Components that have a high overall rigidity when assembled. The assembly of the three individual elements of the basic housing, The tappet guide and cylinder head cover can be used with a small number of screw connections. This also results in a very compact design of the cylinder head assembly, which for a cylinder head overhead camshafts and tappets have a relatively low overall height and above all has a small overall width. With such training the cylinder head assembly, the cylinder head cover and that Cup tappet housings are manufactured, for example, as die-cast components. The Basic housing of the cylinder head assembly can be advantageously in Create permanent mold, using only those necessary for the water flow Channels (with water-cooled cylinder head) through molding sand or similar cast or Molding techniques must be created. At the same time it results from this three-part design of the cylinder head arrangement only a single one to the outside separating plane to be sealed, so that an oil leak with comparatively simple Means to prevent.

Die Gesamtsteifigkeit der Zylinderkopfanordnung im montierten Zustand läßt sich auf vorteilhafte Weise erhöhen, wenn die Lagerböcke jeweils mit den angrenzenden Außenwänden verbunden sind, d. h. wenn die oberen Lagerbockhälften mit der jeweils angrenzenden Außenwand des Zylinderkopfdeckels und die unteren Lagerbockhälften mit der jeweils angrenzenden Außenwand des Grundgehäuses verbunden sind.The overall rigidity of the cylinder head assembly in the assembled state can be increase in an advantageous manner if the bearing blocks each with the adjacent outer walls are connected, d. H. if the top Bearing block halves with the respective adjacent outer wall of the Cylinder head cover and the lower half of the bearing block with the adjacent outer wall of the basic housing are connected.

Für die Fertigung der Zylinderkopfanordnung ergeben sich wesentliche Vereinfachungen, wenn die Verbindung zwischen Zylinderkopfdeckel und Grundgehäuse in einer Trennebene liegt und diese Trennebene mit der Trennebene der Lagerbockhälften übereinstimmt.There are essentials for the manufacture of the cylinder head arrangement Simplifications when the connection between the cylinder head cover and Basic housing lies in a parting plane and this parting plane with the Parting plane of the bearing block halves corresponds.

Die Montage der Zylinderkopfanordnung läßt sich erheblich vereinfachen, wenn die Verschraubung zwischen Zylinderkopfdeckel und Grundgehäuse zumindest im Bereich der Zylinderbohrungen durch die Verschraubung der Lagerbockhälften erfolgt. Dadurch ergibt sich eine erhebliche Verringerung der Verschraubungsstellen. Gleichzeitig wird die Baubreite der Zylinderkopfanordnung verringert, da im Außenbereich keine für diese Verbindung erforderlichen Verschraubungen mehr nötig sind.The assembly of the cylinder head assembly can be considerably simplified if at least the screw connection between the cylinder head cover and the basic housing in the area of the cylinder bores by screwing the Bearing block halves done. This results in a significant reduction in Screwing points. At the same time, the width of the Cylinder head arrangement is reduced, since there is no one for this outdoors Connection required screw connections are more necessary.

Eine günstige, hochfeste Verschraubung zwischen Zylinderkopfanordnung und Zylinderblock ergibt sich, wenn pro Zylinder vier die Zylinderbohrung in einer Rechteckanordnung umfassende Zylinderschrauben vorgesehen sind. Dabei ist es vorteilhaft, wenn bei ausreichendem Bauraum zwischen den jeweiligen Zylindern, wie dies beispielsweise bei Motoren in Boxeranordnungen anzutreffen ist, jeweils zwischen zwei Zylinderschrauben der angrenzenden Zylinderbohrungen ein Lagerbock angeordnet ist.A cheap, high-strength screw connection between the cylinder head assembly and Cylinder block results when four cylinder bores in one per cylinder Rectangular cylinder screws are provided. It is it is advantageous if there is sufficient space between the respective Cylinders such as those found in engines in boxer configurations is, between two cheese head screws of the adjacent A bearing block is arranged in cylinder bores.

Fertigung und Montage der Nockenwellenlagerung werden in hohem Maße vereinfacht, wenn an einer Stirnseite der Zylinderkopfanordnung die Lagerung der jeweiligen Nockenwelle durch einen Einzellagerbock erfolgt. Durch diese Einzellagerböcke kann bei der Montage der Nockenwellen das Niederdrücken gegen die Wirkung der Ventilfedern erfolgen. Besonders vorteilhaft für die Ausbildung und Fertigung der Nockenwellenlagerung ist es, wenn durch diese Einzellagerböcke die Axialführung der Nockenwellen erfolgt.Manufacturing and assembly of the camshaft bearings are to a high degree simplified if the storage on one end of the cylinder head arrangement the respective camshaft is carried out by a single bearing block. Through this Single bearing blocks can be depressed when installing the camshafts against the action of the valve springs. Particularly beneficial for the Training and manufacturing of camshaft bearings is when through this Single bearing blocks, the camshafts are guided axially.

Die Anordnung der Einzellagerböcke erfolgt vorteilhafter Weise im Bereich der für den Antrieb der Nockenwellen erforderlichen Kettenkästen. Die Bohrungen der Nockenwellenlagerung können dann von der gegenüberliegenden Stirnseite der Zylinderkopfanordnung vorgenommen werden, so daß diese Öffnungen in der Stirnseite bei der Montage der Nockenwellen gleichzeitig als Eingriff für ein Werkzeug zum Niederdrücken der Nockenwellen dienen können.The arrangement of the individual bearing blocks is advantageously carried out in the area for chain boxes required to drive the camshafts. The holes of the Camshaft bearings can then from the opposite end of the Cylinder head assembly are made so that these openings in the Front side when mounting the camshafts as an engagement for one Can be used to depress the camshafts.

Die Verbindung zwischen Tassenstößelgehäuse und Grundgehäuse erfolgt vorteilhafter Weise in einer Trennebene, in die auf fertigungstechnisch günstige Weise Kanäle für die Ölführung eingegossen werden können. Damit wird der erforderliche Bohrungsaufwand für die Ölführung wesentlich verringert. Über diese gegossenen Ölkanäle kann mit wenigen Bohrungen die Schmierung der Ventiltassen und der Nockenwelle erfolgen.The connection between the tappet housing and the basic housing is made Advantageously in a parting plane, in the favor of manufacturing technology Way channels for the oil guide can be poured. With that the required drilling effort for the oil guide significantly reduced. over these cast oil channels can be lubricated with just a few holes Valve cups and the camshaft.

Sowohl Fertigung als auch Abdichtung der Zylinderkopfanordnung lassen sich verbessern, wenn der in den Brennraum mündende Schacht zur Aufnahme einer Zündkerze oder einer Einspritzeinrichtung durch eine Hülse verlängert und abgedichtet wird, die zwischen Tassenstößelgehäuse und Zylinderkopfanordnung eingesetzt ist. Diese Hülse läßt sich auf einfache und montagefreundliche Weise in einen ringförmigen Fortsatz im Tassenstößelgehäuse einsetzen und abdichten.Both manufacture and sealing of the cylinder head arrangement can be improve if the shaft opening into the combustion chamber for receiving a Spark plug or an injector extended by a sleeve and is sealed between the tappet housing and cylinder head assembly is inserted. This sleeve can be easily and easily installed insert and seal in an annular extension in the tappet housing.

Die Erfindung wird anhand der nachfolgenden Beschreibung und Zeichnung beispielhaft näher erläutert.The invention is based on the following description and drawing exemplified in more detail.

Es zeigen

Fig. 1
eine Draufsicht auf das geöffnete Grundgehäuse der Zylinderkopfanordnung,
Fig. 2
eine Draufsicht auf das Tassenstößelgehäuse,
Fig. 3
einen Querschnitt durch die Zylinderkopfanordnung durch die Brennraummitte eines Zylinders entlang der Linie III-III gemäß Fig. 1,
Fig. 4
einen weiteren Querschnitt im Bereich eines Lagerbockes entlang der Linie IV-IV nach Fig. 1,
Fig. 5
einen weiteren Querschnitt im Bereich der Ventilführung eines Zylinders entlang der Linie V-V gemäß Fig. 1,
Fig. 6
einen Längsschnitt durch einen Teil des Grundgehäuses entlang der Linie VI-VI nach Fig. 1.
Show it
Fig. 1
a plan view of the open base housing of the cylinder head assembly,
Fig. 2
a plan view of the tappet housing,
Fig. 3
2 shows a cross section through the cylinder head arrangement through the combustion chamber center of a cylinder along the line III-III according to FIG. 1,
Fig. 4
4 shows a further cross section in the area of a bearing block along the line IV-IV according to FIG. 1,
Fig. 5
2 shows a further cross section in the region of the valve guide of a cylinder along the line VV according to FIG. 1,
Fig. 6
a longitudinal section through part of the basic housing along the line VI-VI of FIG. 1st

Eine Brennkraftmaschine weist eine auf einen Zylinderblock 1 aufgesetzte Zylinderkopfanordnung auf, deren Gehäuse aus drei Gehäusebauelementen zusammengesetzt ist, einem Grundgehäuse 2, einem Tassenstößelgehäuse 3 und einem Zylinderkopfdeckel 4. Die Brennkraftmaschine ist in diesem Ausführungsbeispiel in Form einer Zylinderbank eines sechszylindrigen Boxermotors mit jeweils vier Ventilen pro Zylinder und zwei obenliegenden Nockenwellen dargestellt. Diese Brennkraftmaschine weist demzufolge je Zylinderbank drei Zylinderbohrungen 5 auf, die nach der in Fig. 1 gewählten Darstellungsart als linker, mittlerer und rechter Zylinder bzw. entsprechende Zylinderbohrung 5 bezeichnet sind. Jede dieser Zylinderbohrungen 5 wird über vier in Ventilführungen 6 geführte, nicht näher dargestellte Tellerfedern (zwei Einlaßventile, zwei Auslaßventile) und entsprechende Gaswechselkanälen 7 angesteuert. Die Gaswechselkanäle 7 und Ventilführungen 6 sind in einem Grundblock 8 des Grundgehäuses 2 integriert, an den stirnseitig ein Kettenkasten 9 anschließt. Dieser dient zur Aufnahme nicht näher dargestellter Antriebsmittel für den Steuertrieb. Vom Grundblock 8 des Grundgehäuses 2 gehen Außenwände 10, 11 und 12 aus, die gegenüber einer innenliegenden Stützfläche 13 bis zu einer Trennebene T-T hochgezogen sind. Der Kettenkasten 9 wird von Außenwänden 14 umschlossen, die ebenfalls bis zur Trennebene T-T reichen und sich an die Wände 10 und 12 des Grundblocks 8 anschließen.An internal combustion engine has one placed on a cylinder block 1 Cylinder head arrangement, the housing of three housing components is composed, a basic housing 2, a tappet housing 3 and a cylinder head cover 4. The internal combustion engine is in this Embodiment in the form of a cylinder bank of a six-cylinder Boxer engine with four valves per cylinder and two overhead Camshafts shown. This internal combustion engine accordingly has Cylinder bank three cylinder bores 5, which according to the one selected in FIG. 1 Representation as left, middle and right cylinder or corresponding Cylinder bore 5 are designated. Each of these cylinder bores 5 is about four disc springs (not shown) guided in valve guides 6 (two Intake valves, two exhaust valves) and corresponding gas exchange channels 7 controlled. The gas exchange channels 7 and valve guides 6 are in one Base block 8 of the basic housing 2 integrated, on the front side a chain case 9 connects. This serves to accommodate drive means, not shown for the timing drive. Go from the basic block 8 of the basic housing 2 Outer walls 10, 11 and 12 made opposite an inner support surface 13 are pulled up to a parting plane T-T. The chain case 9 is from Enclosed outer walls 14, which also extend to the parting plane T-T and connect to the walls 10 and 12 of the base block 8.

Im Grundblock 8 des Grundgehäuses 2 sind drei Schächte 15 ausgebildet, die jeweils von der Stützfläche 13 ausgehen und in eine der drei Zylinderbohrungen 5 münden. Die Achsen der drei Schächte 15 liegen in einer Mittellängsebene M und dienen zur Aufnahme jeweils einer Zündkerze 16. Sie können jedoch auch, insbesondere bei Selbstzündermotoren, zur Aufnahme von Einspritzeinrichtungen oder Glühkerzen dienen. Jeder dieser Schächte 15 wird von einer ringförmigen eingegossenen Vertiefung 17 umgeben, die Teil der Ölführung des Zylinderkopfes ist. Die ringförmige Vertiefung 17 im Bereich des linken Zylinders ist mit einer ebenfalls eingegossenen Längsnut 18 verbunden, die auf nicht näher dargestellte Weise mit der Ölzufuhr der Zylinderkopfanordnung verbunden ist. Diese Längsnut 18 verläuft etwa parallel zur Mittellängsebene M. Die ringförmigen Vertiefungen im Bereich des mittleren und rechten Zylinders sind durch eine weitere eingegossene Längsnut 19 miteinander verbunden, die ebenfalls mit der Ölzufuhr der Zylinderkopfanordnung verbunden ist und etwa parallel zur Mittellängsebene M verläuft. Die ringförmigen Vertiefungen 17 und die Längsnuten 18 und 19 werden jeweils von einem Dichtsteg 20 umgeben, dessen Dichtfläche Teil der Stützfläche 13 ist. Die ringförmigen Vertiefungen 17 liegen jeweils innerhalb eines durch die Durchtrittsöffnungen der Ventilführungen 6 in die Standfläche 13 gebildeten Rechteckes, dessen kürzere Seiten parallel zur Mittellängsebene M liegen. Die Ventilführungen 6 sind jeweils gegen diese Ebene geneigt und in zwei Reihen angeordnet.In the basic block 8 of the basic housing 2, three shafts 15 are formed each start from the support surface 13 and into one of the three cylinder bores 5 lead. The axes of the three shafts 15 lie in a central longitudinal plane M. and are used to hold one spark plug 16. You can also, especially for self-ignition engines, to accommodate injection devices or glow plugs. Each of these shafts 15 is of an annular shape poured recess 17 surround the part of the oil guide of the Cylinder head is. The annular recess 17 in the area of the left cylinder is connected to a likewise cast-in longitudinal groove 18, which does not refer to illustrated manner is connected to the oil supply to the cylinder head assembly. This longitudinal groove 18 runs approximately parallel to the central longitudinal plane M. Die are annular depressions in the area of the middle and right cylinder connected by a further cast longitudinal groove 19, the is also connected to the oil supply to the cylinder head assembly and approximately runs parallel to the median longitudinal plane M. The annular depressions 17 and the longitudinal grooves 18 and 19 are each surrounded by a sealing web 20, whose sealing surface is part of the support surface 13. The annular depressions 17th are each within one through the passage openings of the valve guides 6 in the base 13 formed rectangle, the shorter sides parallel to the median longitudinal plane M. The valve guides 6 are each against this Inclined plane and arranged in two rows.

Die Verschraubung des Grundgehäuses 2 mit dem Zylinderblock 1 erfolgt in zwei Reihen, d.h. die Verschraubungen liegen jeweils in einer Ebene E1 bzw. E2 parallel zur Mittellängsebene M. Die Verschraubungen 21 zwischen Grundgehäuse 2 und Zylinderblock 1 und die im nachfolgenden noch näher erläuterten weiteren Verschraubungen sind hier der besseren Übersicht halber nur durch ihre Bohrungen dargestellt. Pro Zylinderbohrung 5 sind dabei jeweils vier Verschraubungen 21 vorgesehen, deren Verbindungslinien ein Rechteck bilden, das die Ventilführungen 6 umfaßt. Das durch die vier Verschraubungen 21 je Zylinder gebildete Rechteck hat seine kürzeren Seiten parallel zur Mittellängsebene M.The basic housing 2 is screwed to the cylinder block 1 in two Rows, i.e. the screw connections are each in a plane E1 or E2 parallel to the median longitudinal plane M. The screw connections 21 between Basic housing 2 and cylinder block 1 and the following in more detail Further screw connections explained are here for the sake of a better overview only represented by their holes. There are 5 for each cylinder bore four screw connections 21 are provided, the connecting lines of which are a rectangle form, which includes the valve guides 6. That through the four screw connections 21 rectangle formed per cylinder has its shorter sides parallel to Median longitudinal plane M.

Im Grundblock 8 des Grundgehäuses 2 sind weiterhin je Nockenwelle bzw. je Ventilreihe vier untere Lagerbockhälften 22 angeordnet. Dabei liegen sich jeweils die unteren Lagerbockhälften der beiden Ventilreihen paarweise gegenüber. Ein erstes Lagerbockhälftenpaar 22 ist im Bereich des Kettenkastens 9 angeordnet, ein zweites Lagerbockhälftenpaar 22 befindet sich im Bereich der gegenüberliegenden Außen- bzw. Stirnwand 11 und zwei weitere Paare von Lagerbockhälften 22 befinden sich zwischen dem linken und mittleren Zylinder bzw. zwischen dem mittleren und rechten Zylinder. Diese beiden Paare von Lagerbockhälften 22 sind dabei jeweils zwischen zwei benachbarten Verschraubungen 21 der angrenzenden Zylinderbohrungen 5 angeordnet. In jeder der unteren Lagerbockhälften 22 sind zwei Bohrungen 23 zur Verschraubung mit den im nachfolgenden näher beschriebenen oberen Lagerbockhälften angebracht. Diese Bohrungen 23 sind so angeordnet, daß die einzulegende Nockenwelle zwischen ihnen liegt. Dabei werden vier Reihen bzw. Ebenen von Verschraubungen bzw. Bohrungen 23 gebildet, die in der in Fig. 1 dargestellten Ausrichtung des Grundgehäuses 2 von oben nach unten mit B1 bis B4 bezeichnet sind. Die Bohrungsebene B1 liegt dabei oberhalb der Ebene E1 der Verschraubungen 21 und die Bohrungsebene B2 liegt unterhalb dieser Ebene. Beide Bohrungsebenen B1 und B2 liegen oberhalb der Mittelebene M. Die Bohrungsebenen der unteren Reihe von Lagerbockhälften sind als B3 und B4 bezeichnet, dabei liegt die Bohrungsebene B3 oberhalb und die Bohrungsebene B4 unterhalb der Ebene E2 der Verschraubungen 21.In the basic block 8 of the basic housing 2 are still each camshaft or Valve row four lower bracket halves 22 arranged. Each lie the lower half of the bearing block of the two rows of valves opposite each other. A first pair of bearing blocks 22 is arranged in the area of the chain case 9, a second pair of bearing blocks 22 is located in the area of the opposite outer or end wall 11 and two further pairs of Bearing block halves 22 are located between the left and middle cylinders or between the middle and right cylinder. These two pairs of Bearing block halves 22 are each between two adjacent ones Screws 21 of the adjacent cylinder bores 5 are arranged. In each of the lower bracket halves 22 are two holes 23 for Screw connection with the upper ones described in more detail below Bearing block halves attached. These holes 23 are arranged so that the camshaft to be inserted lies between them. Four rows or Levels of screw connections or bores 23 formed in the in Fig. 1st Alignment of the basic housing 2 shown from top to bottom with B1 to B4 are designated. Hole level B1 is above level E1 the screw connections 21 and the bore level B2 lie below this Level. Both hole levels B1 and B2 lie above the middle level M. The hole planes of the lower row of bearing block halves are B3 and B4 referred to, the bore level B3 is above and the bore level B4 below the level E2 of the screw connections 21.

Zwischen den in einer Ebene E1 bzw. E2 liegenden Verschraubungen 21 je Zylinderbohrung 5 liegt jeweils eine weitere Verschraubung 24, über die das Tassenstößelgehäuse 3 und das Grundgehäuse 2 miteinander verbunden werden. Die Verschraubungen 24 des Tassenstößelgehäuses 2 liegen dabei in zwei Ebenen T1 bzw. T2 parallel zur Mittelebene M. Die obere Ebene T1 liegt zwischen der der Außenwand 10 zugewandten Bohrungsebene B1 und der Ebene E1 der Verschraubungen 21, die untere Ebene T2 liegt zwischen der unteren Ebene E2 der Verschraubungen 21 und der der Außenwand 12 zugewandten Bohrungsebene B4 der Lagerbockhälften 22. Eine dritte Reihe von Verschraubungen 25 für das Tassenstößelgehäuse 3 liegt in der Mittellängsebene M. Zur besseren Abdichtung der gegossenen Ölkanäle sind zusätzliche Verschraubungen 26 im Bereich der Dichtstege 20 vorgesehen. Each between the screw connections 21 lying in a plane E1 or E2 Cylinder bore 5 is a further screw 24, through which Bucket housing 3 and the basic housing 2 connected to each other will. The screw connections 24 of the tappet housing 2 are in two levels T1 and T2 parallel to the central level M. The upper level T1 lies between the bore plane B1 facing the outer wall 10 and the Level E1 of the screw connections 21, the lower level T2 lies between the lower level E2 of the screw connections 21 and that of the outer wall 12 facing bore plane B4 of the bearing block halves 22. A third row of Screws 25 for the tappet housing 3 is in the Central longitudinal plane M. For better sealing of the cast oil channels additional screw connections 26 are provided in the area of the sealing webs 20.

Auf die Stützfläche 13 des Grundgehäuses 2 ist das Tassenstößelgehäuse 2 mit seiner Grundfläche 27 so aufgesetzt, daß sich die Bohrungen bzw. Verschraubungen 24 bis 26 entsprechend fortsetzen. Das Tassenstößelgehäuse 2 umfaßt je Zylinderbohrung 5 vier Tassenstößelführungen 28, die mit den jeweiligen Achsen der Ventilführungen fluchten. Die vier Tassenstößelführungen 28 je Zylinder sind miteinander verbunden. Jede dieser Gruppe von vier Tassenstößelführungen 28 ist über Stege 29 mit der benachbarten Gruppe von Tassenstößelführungen 28 verbunden, so daß das ganze Tassenstößelgehäuse einstückig ausgebildet ist. Innerhalb des durch die vier Tassenstößelführungen je Zylinderbohrung begrenzten Raumes ist eine Bohrung 30 vorgesehen, die mit dem Schacht 15 fluchtet. Jede dieser Bohrungen ist an der Oberseite des Tassenstößelgehäuses 2 von einem ringförmigen Fortsatz 31 umgeben. In der Grundfläche 27 des Tassenstößelgehäuses 3 ist je Bohrung 30 eine diese umgebende Ringnut 32 ausgebildet, die zusammen mit der ringförmigen Vertiefung 17 in der Stützfläche 13 einen Ölkanal bildet. Die Ringnut 32 im Bereich der linken Zylinderbohrung ist mit einer Längsnut 33 verbunden, die in einem Längssteg 34 angeordnet ist und mit der Längsnut 18 im Grundgehäuse 2 einen Ölkanal bildet. Die Ringnuten 32 im Bereich der mittleren und rechten Zylinderbohrung sind ebenfalls über eine Längsnut 34 miteinander verbunden, die mit der entsprechenden Längsnut 19 im Grundgehäuse 2 zusammenwirkt und in einen Längssteg 36 eingegossen ist. Die Ölversorgung der Tassenstößelführungen erfolgt über Schrägbohrungen 46, die in die Ringnut 32 münden.The tappet housing 2 is on the support surface 13 of the basic housing 2 its base 27 so that the bores or Continue screw connections 24 to 26 accordingly. The tappet housing 2 includes 5 four tappet guides 28 per cylinder bore, which with the respective axes of the valve guides are aligned. The four tappet guides 28 per cylinder are interconnected. Each of this group of four Cup tappet guides 28 are connected to the adjacent group of webs 29 Bucket guides 28 connected so that the whole bucket housing is formed in one piece. Within each of the four tappet guides Cylinder bore limited space, a bore 30 is provided with the shaft 15 is aligned. Each of these holes is on the top of the Cup tappet housing 2 surrounded by an annular extension 31. In the Base area 27 of the tappet housing 3 is one for each bore 30 surrounding annular groove 32 formed together with the annular Recess 17 in the support surface 13 forms an oil channel. The annular groove 32 in The area of the left cylinder bore is connected to a longitudinal groove 33, which in a longitudinal web 34 is arranged and with the longitudinal groove 18 in the basic housing 2nd forms an oil channel. The ring grooves 32 in the middle and right Cylinder bores are also connected to one another via a longitudinal groove 34, which interacts with the corresponding longitudinal groove 19 in the basic housing 2 and is cast into a longitudinal web 36. The oil supply to the Bucket tappet guides are made via oblique bores 46 which extend into the annular groove 32 flow out.

Die Zylinderkopfanordnung wird durch einen Zylinderkopfdeckel 4 abgeschlossen, der im Bereich der Trennebene T-T auf die Außenwände 10 bis 12 und 14 des Grundgehäuses 2 aufgesetzt ist und das Tassenstößelgehäuse 3 überdeckt. Der Zylinderkopfdeckel enthält drei Paare von oberen Lagerbockhälften 37, die jeweils mit den zwischen dem linken und mittleren Zylinder, dem mittleren und rechten Zylinder und den im Bereich der rechten Stirn- bzw. Außenwand 11 angeordneten unteren Lagerbockhälften 22 zusammenwirken. Diese oberen Lagerbockhälften 37 gehen jeweils von einer Außenwand des Zylinderkopfdeckels 24 aus bzw. sind einstückig mit dieser verbunden. Die Verschraubung zwischen Grundgehäuse 2 und Zylinderkopfdeckel 4 erfolgt im Bereich des Grundblockes 8 durch die Verschraubung 23 der Lagebockhälften. Lediglich im Bereich des Kettenkastens 9 sind zusätzliche Verschraubungen 38 im Bereich der Außenwände 14 vorgesehen. Im Zylinderkopfdeckel 4 sind drei Bohrungen 39 angeordnet, die jeweils mit einem der Schächte 15 fluchten. In diese Bohrungen 39 sind Hülsen 40 eingesetzt, die bis in den ringförmigen Fortsatz 31 des Tassenstößelgehäuses 3 ragen und dort und im Bereich der Bohrung 39 jeweils durch Dichtringe 41 bzw. 42 abgedichtet sind. Diese Hülsen 40 verlängern bzw. dichten den Schacht 15 bzw. die Bohrung 30 gegen den Innenraum, der durch Grundgehäuse 2 und Zylinderkopfdeckel 4 gebildet wird.The cylinder head arrangement is covered by a cylinder head cover 4 completed in the area of the parting plane T-T on the outer walls 10 to 12 and 14 of the base housing 2 is placed and the bucket tappet housing 3 covered. The cylinder head cover contains three pairs of top Bearing block halves 37, each with the between the left and middle Cylinders, the middle and right cylinders and those in the area of the right End and outer wall 11 arranged lower bracket halves 22nd work together. These upper bracket halves 37 each go from one Outer wall of the cylinder head cover 24 or are integral with this connected. The screw connection between basic housing 2 and Cylinder head cover 4 takes place in the area of the base block 8 through the Screw connection 23 of the bracket halves. Only in the area of the chain case 9 are additional screw connections 38 in the area of the outer walls 14 intended. In the cylinder head cover 4, three holes 39 are arranged each aligned with one of the shafts 15. In these holes 39 are sleeves 40 inserted into the annular extension 31 of the tappet housing 3 protrude and there and in the area of bore 39 each through sealing rings 41 or 42 are sealed. These sleeves 40 extend or seal the shaft 15 or the bore 30 against the interior, through the base housing 2 and Cylinder head cover 4 is formed.

Die Lagerung der Nockenwellen 43 erfolgt im Bereich des Kettenkastens 9 durch die beiden unteren Lagerbockhälften 22, auf die separate Einzellagerbockoberteile 44 aufgesetzt sind. Diese separaten Lagerbockoberteile 44 sind breiter (in Achsrichtung betrachtet) als die entsprechende untere Lagerbockhälfte 22 und übernehmen die Axialführung der Nockenwelle. Dadurch braucht je Nockenwelle nur ein separates Lageroberteil für die Axialführung bearbeitet werden. Durch die separaten Lagerbockoberteile erfolgt bei der Montage gleichzeitig auf der Kettenkastenseite das Niederdrücken der Nockenwellen gegen die Wirkung der nicht dargestellten Ventilfedern. Auf der gegenüberliegenden Stirnseite 11 des Grundgehäuses bzw. in der entsprechenden Stirnseite des Zylinderkopfdeckels sind Montagebohrungen 45 eingebracht, die einerseits zum Bearbeiten der Lagerbohrungen und zum anderen zum Niederdrücken der Nockenwellen bei der Montage dienen bzw. den dazu notwendigen Freiraum schaffen.The camshafts 43 are supported in the area of the chain case 9 the two lower bracket halves 22, on the separate Single bearing block upper parts 44 are placed. These separate headstock upper parts 44 are wider (viewed in the axial direction) than the corresponding lower one Bearing block half 22 and take over the axial guidance of the camshaft. Thereby only needs a separate upper bearing part for the axial guidance per camshaft to be edited. Due to the separate top bracket parts at Assembly at the same time on the chain case side, depressing the Camshafts against the action of the valve springs, not shown. On the opposite end face 11 of the basic housing or in the corresponding bores of the cylinder head cover are mounting holes 45 introduced, on the one hand for machining the bearing holes and for others to depress the camshafts during assembly or create the necessary space.

Claims (15)

  1. A cylinder-head arrangement of an internal-combustion engine,
    with a base housing (2) comprising gas-exchange ducts (7) and valve guides (6) and mounted on a cylinder block (1),
    with a barrel-tappet housing (3) mounted on the base housing (2),
    with a cylinder-head cover (4) covering the camshafts (43) mounted in two-part bearing stands (22, 37, 44),
    wherein the barrel-tappet housing (3) is arranged inside a space formed by the cylinder-head cover (4) and the base housing (2),
    characterized in that the barrel-tappet housing (3) is constructed in one piece,
    the lower bearing-stand halves (22) are integrated in the base housing (2),
    and the upper bearing-stand halves (37) are formed at least in part in the cylinder-head cover (4).
  2. A cylinder-head arrangement according to Claim 1, characterized in that the upper bearing-stand halves (37) are integrally joined to the outer wall of the cylinder-head cover (4), and the lower bearing-stand halves (22) are integrally joined to the outer wall (10, 12) of the base housing (2).
  3. A cylinder-head arrangement according to Claim 1 or 2, characterized in that the connexion face between the base housing (2) and the cylinder-head cover (4) is situated in one plane (T-T) with the separation face of the bearing-stand halves (22, 37).
  4. A cylinder-head arrangement according to one of Claims 1 to 3, characterized in that the bolt connexion between the base housing (2) and the cylinder-head cover (4) is formed by the bolt connexion (23) of the bearing-stand halves (22, 37) at least in the region of the base block (8) contain[ing] the cylinder bores (5).
  5. A cylinder-head arrangement according to one of Claims 1 to 4, characterized in that the bolt connexion between the base housing (2) and the cylinder block (1) is formed by four cylinder bolts (21) per cylinder which comprise the cylinder bore (5) in a rectangular arrangement in each case.
  6. A cylinder-head arrangement according to Claim 5, characterized in that a bearing stand (22, 37) is arranged in each case between the adjacent cylinder bolts (21) of the juxtaposed cylinder bores (5).
  7. A cylinder-head arrangement according to one of Claims 1 to 6, characterized in that a chain case (9), in the region of which the camshafts (43) are supported by one individual bearing stand (22, 44) in each case, is mounted on the front end of the cylinder-head arrangement.
  8. A cylinder-head arrangement according to Claim 7, characterized in that the underside of the individual bearing stand is formed by a lower bearing-stand half (22) which is integrated in the base housing and on which a separate upper part (44) of the bearing stand is mounted.
  9. A cylinder-head arrangement according to Claim 7 or 8, characterized in that the camshaft (43) is mounted axially by the individual bearing stand (22, 44).
  10. A cylinder-head arrangement according to one of Claims 7 to 9, characterized in that a bore (45) in alignment with the camshaft (43) is formed on the front end (11) of the cylinder-head arrangement opposite the chain case (9).
  11. A cylinder-head arrangement according to one of Claims 1 to 10, characterized in that oil ducts (17, 18, 19, 31, 33, 35) cast in the base housing (2) and the barrel-tappet housing (3) extend in the separation plane (T-T) between the said base housing (2) and the said barrel-tappet housing (4).
  12. A cylinder-head arrangement according to Claim 11, characterized in that the barrel-tappet guides (28) are supplied with lubricating oil by way of the cast oil ducts.
  13. A cylinder-head arrangement according to Claim 11 or 12, characterized in that the camshaft (43) is supplied with lubricating oil by way of the cast oil ducts in the separation plane (T-T) and by way of bored oil ducts to a bearing stand (22, 37).
  14. A cylinder-head arrangement according to one of Claims 1 to 13, characterized in that the valve guides (6) and the barrel-tappet guides (28) have a bore (15) opening into the cylinder bore (5), the said bore (15) is extended and sealed by a sleeve (40) which is inserted between the barrel-tappet housing (3) and the cylinder-head cover (4).
  15. A cylinder-head arrangement according to Claim 14, characterized in that the barrel-tappet housing (3) has an annular extension (31) which embraces the bore (15) and into which the sleeve (40) is inserted and is held securely and sealed by a sealing ring (41).
EP95107276A 1994-06-16 1995-05-13 Cylinder head layout of an internal combustion engine Expired - Lifetime EP0688946B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4421057A DE4421057C1 (en) 1994-06-16 1994-06-16 Cylinder head arrangement for IC engine
DE4421057 1994-06-16

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EP0688946A1 EP0688946A1 (en) 1995-12-27
EP0688946B1 true EP0688946B1 (en) 1998-09-23

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EP95107276A Expired - Lifetime EP0688946B1 (en) 1994-06-16 1995-05-13 Cylinder head layout of an internal combustion engine

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US (1) US5609129A (en)
EP (1) EP0688946B1 (en)
JP (1) JP3648285B2 (en)
KR (1) KR100350193B1 (en)
DE (2) DE4421057C1 (en)

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DE19548088C1 (en) * 1995-12-21 1997-07-17 Daimler Benz Ag Cylinder head for an internal combustion engine
DE19618401C1 (en) * 1996-05-08 1997-07-03 Porsche Ag Cylinder head arrangement for internal combustion engine
DE19619183C1 (en) * 1996-05-11 1997-07-03 Porsche Ag Cylinder head arrangement for internal combustion engine
DE19621318C1 (en) * 1996-05-28 1997-06-05 Daimler Benz Ag Guide bore for valve operating push-rod
DE19712658A1 (en) * 1997-03-26 1998-10-01 Schaeffler Waelzlager Ohg Cylinder head with cylinders stepped for camshaft bearings
JPH10331709A (en) * 1997-05-29 1998-12-15 Suzuki Motor Corp Cylinder head structure of internal combustion engine
DE19728947C2 (en) * 1997-07-07 2001-03-15 Audi Ag Internal combustion engine with a cylinder head
DE19833199B4 (en) * 1998-07-23 2006-09-28 Audi Ag Cylinder head cover of an internal combustion engine
DE19928838C1 (en) * 1999-06-24 2001-02-15 Otmar Gaehrken Cylinder head
DE102004006343B4 (en) * 2004-02-10 2017-09-14 Bayerische Motoren Werke Aktiengesellschaft cylinder head
JP4191648B2 (en) * 2004-05-21 2008-12-03 本田技研工業株式会社 engine
AT500411B8 (en) * 2004-11-25 2007-02-15 Avl List Gmbh CYLINDER HEAD ARRANGEMENT FOR AN INTERNAL COMBUSTION ENGINE
US8820277B2 (en) * 2011-03-08 2014-09-02 GM Global Technology Operations LLC Engine assembly including cylinder head oil gallery
EP2746559B1 (en) * 2012-12-21 2016-06-29 Caterpillar Motoren GmbH & Co. KG Cylinder head and engine block configuration
GB201603445D0 (en) * 2016-02-29 2016-04-13 Delphi Internat Operations Luxembourg S À R L Fuel rail clamping arrangement

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Also Published As

Publication number Publication date
EP0688946A1 (en) 1995-12-27
JPH0849595A (en) 1996-02-20
KR960001452A (en) 1996-01-25
DE59503664D1 (en) 1998-10-29
US5609129A (en) 1997-03-11
DE4421057C1 (en) 1995-09-14
KR100350193B1 (en) 2002-12-18
JP3648285B2 (en) 2005-05-18

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