EP0436779B1 - Cylinder head for internal-combustion engine - Google Patents
Cylinder head for internal-combustion engine Download PDFInfo
- Publication number
- EP0436779B1 EP0436779B1 EP90116952A EP90116952A EP0436779B1 EP 0436779 B1 EP0436779 B1 EP 0436779B1 EP 90116952 A EP90116952 A EP 90116952A EP 90116952 A EP90116952 A EP 90116952A EP 0436779 B1 EP0436779 B1 EP 0436779B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cylinder head
- cylinder
- head according
- support
- receiving means
- 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
Links
Images
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
- F01L1/26—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder
- F01L1/262—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder with valve stems disposed radially from a centre which is substantially the centre of curvature of the upper wall surface of a combustion chamber
-
- 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
- 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
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/14—Tappets; Push rods
- F01L1/143—Tappets; Push rods for use with overhead camshafts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
- F01M11/02—Arrangements of lubricant conduits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M9/00—Lubrication means having pertinent characteristics not provided for in, or of interest apart from, groups F01M1/00 - F01M7/00
- F01M9/10—Lubrication of valve gear or auxiliaries
- F01M9/102—Lubrication of valve gear or auxiliaries of camshaft bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M9/00—Lubrication means having pertinent characteristics not provided for in, or of interest apart from, groups F01M1/00 - F01M7/00
- F01M9/10—Lubrication of valve gear or auxiliaries
- F01M9/104—Lubrication of valve gear or auxiliaries of tappets
-
- 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
- F02F1/242—Arrangement of spark plugs or injectors
-
- 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
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
- F01L2001/0476—Camshaft bearings
-
- 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
- F01L2001/0537—Double overhead camshafts [DOHC]
-
- 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
- F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
- F01L2003/25—Valve configurations in relation to engine
- F01L2003/256—Valve configurations in relation to engine configured other than perpendicular to camshaft axis
-
- 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
- F02B2275/02—Attachment or mounting of cylinder heads on cylinders
-
- 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
-
- 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
- F02F2001/246—Arrangement of valve stems in cylinder heads the valve stems being orientated at an angle with the cylinder axis and orientated radially from the combustion chamber surface
Definitions
- the invention relates to a cylinder head of an internal combustion engine according to the preamble of claim 1.
- a camshaft bearing frame for an internal combustion engine with four valves per cylinder is known, which is screwed onto the cylinder head base housing as a separate part.
- This bearing frame consists of a cast part with webs running transversely to the longitudinal direction between the cylinders and at the two ends of the cylinder head, and with two webs running parallel in the longitudinal direction, which rest on the lateral housing walls of the cylinder head.
- Lower half-shells for the bearings of camshafts are formed in the transverse webs, the upper halves of which are formed by separate bearing covers which can be screwed onto the camshaft bearing frame.
- This bearing frame enables the camshafts and their bearings to be pre-assembled separately.
- DE 38 19 655 discloses a four-valve cylinder head for an internal combustion engine, in which the receptacles for the tappets are combined in pairs in the form of glasses.
- This cylinder head has a complicated shape, which requires a sand casting process due to the many undercuts on the top side opposite the combustion chamber side. This process requires thorough and time-consuming cleaning of the top side after casting.
- Upper and lower girder sections each include parts of a central web and parts of several cross webs.
- no separate, weight-increasing longitudinal webs are arranged in the carrier, rather this function is performed by struts running on both sides of the central web in the lower part of the carrier, which include tappet-guiding receptacles which are connected to one another by bridges.
- Each receptacle is in turn supported by at least one support on the part of the central web running in the lower part of the carrier.
- the tappet bearing, pair-cooperating receptacles of a cylinder are connected to one another via a bridge designed as a rib, while the bridge between receptacles belonging to adjacent cylinders is used as bearing bottoms of bearings is designed for two camshafts.
- the pairs of cooperating receptacles of a cylinder are connected via a bridge designed as a bearing lower part of a bearing of a camshaft, the bridge between receptacles belonging to adjacent cylinders being connected via a bridge designed as a rib.
- the central web extends in a ring shape above each cylinder to form at least one ring element.
- the through openings formed by the ring elements allow the installation of a spark plug or an injection device.
- double ignition can be implemented, in which case two valves are then preferably arranged per cylinder.
- the contour of the upper part of the carrier is adapted to that of the lower part of the carrier, ie it carries a corresponding number of ring elements in the central web and the upper parts of the bearings for the bearings of the camshafts are each arranged above the bridges of the lower part of the carrier which are designed as lower parts of the bearing.
- stiffening ribs can be arranged in the upper girder part between the transverse webs. It can thus be used advantageously in both internal and externally ignited internal combustion engines with two or more valves per cylinder and single or double spark plug arrangement.
- the invention provides great freedom in the valve position with respect to the combustion chamber and in the arrangement of the cylinder head screws.
- an internal combustion engine with e.g. Four valves per cylinder, which are arranged spherically to the combustion chamber, cannot meet the load-bearing and easily accessible arrangement of the cylinder head screws with bucket tappet guides arranged in the cylinder head housing and at the same time demand for the smallest overall length of the internal combustion engine.
- the holes in the cylinder head housing which are used for the through-opening of the cylinder head bolts, are freely accessible, and these holes can be arranged in a manner suitable for the load in areas of maximum strength of the cylinder block underneath.
- Cylinder head assembly first requires inserting the valves into the cylinder head housing and attaching the cylinder head bolts. Then the valve springs and the valve plates are attached. Following this, either the completely pre-assembled carrier can be screwed onto the cylinder head housing as a complete unit, or its individual parts can be assembled one after the other. In the latter case, the first will be Lower part of the carrier inserted and the tappets inserted into the receptacles. The camshafts are then inserted and the upper part of the beam is screwed onto the lower part of the beam, as is the entire beam on the cylinder head housing.
- the carrier can be completely pre-assembled by machine and then mechanically attached to the cylinder head housing.
- the cylinder head 1 of a multi-cylinder internal combustion engine has a cylinder head housing 3 arranged on a cylinder block 2 and a carrier 4 mounted thereon, in which camshafts 5 are arranged in bearings 6.
- the cylinder head 1 has four spherically arranged valves 7 with springs 8 and spring plates 9 assigned to them.
- the valves 7 are actuated by conical cams 10 directly via tappets 11.
- the carrier 4 consists of an upper carrier part 12 and a lower carrier part 13.
- the carrier 4 has a central web 15 running as a longitudinal web 14 , which runs parallel to the crankshaft of the internal combustion engine and is formed in the upper carrier part 12 and in the lower carrier part 13.
- Struts 16, which are formed from receptacles 17 for the cup tappets 11 and bridges 18 connecting these receptacles 17, run in the lower carrier part 13 on both sides of the central web 15 and spaced parallel to them.
- the receptacles 17 are arranged coaxially with the central longitudinal axes V of the valves 7.
- the central longitudinal axes N of the camshaft 5 run in the plane parting plane 20 running between the upper part 12 and the lower part 13.
- the bearings 6 are each formed from the upper part 21 in the upper part 12 and the lower part 22 in the lower part 13.
- Each receptacle 17 is designed as a guide sleeve connected to the lower support part 13 via at least one support 23.
- the struts 16 run with the supports 23 below the parting plane 20.
- the central web 15 widens in a ring shape to form a ring element 24, which in this case encloses a through opening 25 and is arranged concentrically to the cylinder longitudinal axis Z. It enables the insertion of a tube 26, which enables access to a spark plug 27.
- a lubricant channel system is arranged in the carrier 4 and is connected to the lubricating oil circuit of the internal combustion engine.
- This system comprises channels 28, 29, 30, the channels 28, 29 running within the upper carrier part 12 in the central web 15 and in the transverse webs 19 and the channels 30 being arranged in the supports 23.
- the channel 28 is connected at an arbitrary point, not shown, to the lubricating oil circuit of the internal combustion engine and serves as a distributor for the lubricating oil into the channels 29, 30.
- the through-openings 25 are evenly flowed around by the channel 28, so that they are in the area of the ring elements 24 the carrier lower part 13 connected channels 30 supply the receptacles 17 with lubricating oil for guiding the tappets.
- channels 30 branch off from channel 28 and lead lubricating oil to the bearings 6 of the camshafts 5.
- first bridges 18 are designed as the lower bearing parts 22.
- the transverse webs 19 are arranged between the struts 16 and are made in one piece with the lower bearing parts 22.
- the transverse webs 19 have projections 32 which ensure that the receptacles 17 lying adjacent to a transverse web 19 are rigidly connected to one another over their entire height.
- Second bridges 18 are designed as ribs 31 between the receptacles 17 belonging to a cylinder. These ribs 31 can be omitted if the associated receptacles 17 are cast together directly at a small distance.
- the upper bearing parts 21 are formed in the part of the transverse webs 19 running in the upper part 12 of the carrier. On both sides of the upper bearing parts 21 and in the region of the central web 15, bores 33 are arranged in the upper carrier part 12, which together with further bores 33 in the lower carrier part 13 and in the cylinder head housing 3 enable screw connections 34, 35.
- the cylinder head housing 3 When assembling the part described above, the cylinder head housing 3 is first fastened to the cylinder block 2 with cylinder head screws 36 after the valves 7 have been pushed into corresponding guides. Bores 37 are provided in the cylinder head housing for receiving the cylinder head screws 36. Then the springs 8 and the spring plate 9 are attached to the valves 7. At this time, the image shown in FIG. 1 in the section labeled A results for the entire cylinder head. Subsequently, as already mentioned in the introduction to the description, the carrier 4 fully equipped with the camshafts 5 and the tappets 11 can be assembled as a whole or in individual parts in succession. The latter option is described in more detail below.
- the carrier lower part 13 is first placed on the cylinder head housing 3 at three contact surfaces 38, then the tappets 11 are pushed into the receptacles 17.
- the result shown in the section labeled B in FIG. 1 results for the entire cylinder head.
- the upper carrier part 12 is fixed to the lower carrier part 13 with the screw connections 34.
- the screw connections 35 penetrate the contact surfaces 38 and clamp the carrier lower part 13 between the cylinder head housing 3 and the upper carrier part 12 and fasten the carrier 4 in the cylinder head 1 (section D in FIG. 1).
- a hood 39 is placed on the cylinder head 1.
- This hood 39 surrounds the carrier 4 in a U-shape and lies on a flange 40 which can be machined together with the contact surfaces 38.
- the surface between the hood 39 and the flange 40 is completely flat and has no bores, so that a simple seal is possible.
- the tube 26 is inserted into the passage opening 25 and seals the spark plug area by means of two seals 41 in an opening 42 of the hood 39 and in a holder 43 in the cylinder head housing 3.
- the arrangement of the screw connections 34, 35 in the plane in which the cylinder head screws are arranged enables an optimal, load-appropriate application of force from the carrier 4 to the cylinder block 2.
- the invention can also be advantageous in internal combustion engines with e.g. two or three valves per cylinder can be used.
- the corresponding receptacles 17 lie opposite one another in a plane which is parallel to and in the middle of two transverse webs 19.
- two receptacles 17 are advantageously located diagonally opposite one another between two transverse webs 19.
- the central web 15 then has two ring elements 24 for each cylinder, which can also lie diagonally opposite one another.
- the transverse webs 19 are arranged above each cylinder of the internal combustion engine and each take on an annular element 24.
- two receptacles 17 assigned to a cylinder are cast together below a lower bearing part 22 which acts as a bridge 18.
- Two adjacent receptacles 17 belonging to adjacent cylinders are connected by a rib 31.
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)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Description
Die Erfindung betrifft einen Zylinderkopf einer Brennkraftmaschine gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a cylinder head of an internal combustion engine according to the preamble of
In US-PS 46 12 885 ist ein Zylinderkopfgehäuse mit einem lösbar daran gehaltenen Träger bekannt, wobei Lagerunterteile von Lagern für Nockenwellen in dem Träger ausgebildet sind. Auf den Träger sind vereinzelte Lageroberteile aufgesetzt. Weiterhin weist dieser Träger als außenliegende Längsstege parallel zur Richtung der Kurbelwelle beabstandet zueinander verlaufende Außenwände auf sowie rechtwinkelig dazu angeordnete Querstege, in welchen die Lager ausgebildet sind. An diese Außenwände sind Aufnahmen für Tassenstößel angegossen, welche von den Nockenwellen betätigt auf Ventile wirken.In US-PS 46 12 885 a cylinder head housing with a detachably held carrier is known, bearing lower parts of bearings for camshafts being formed in the carrier. Sporadic upper bearing parts are placed on the carrier. Furthermore, this carrier has, as external longitudinal webs, parallel to the direction of the crankshaft, outer walls running at a distance from one another and transverse webs arranged at right angles thereto, in which the bearings are formed. Receptacles for bucket tappets are cast onto these outer walls and act on the valves when actuated by the camshafts.
Aus der DE- 36 41 129 C1 ist ein Nockenwellen- Lagerrahmen für eine Reihenbrennkraftmaschine mit vier Ventilen pro Zylinder bekannt, welcher als separates Teil auf das Zylinderkopfgrundgehäuse aufgeschraubt wird. Dieser Lagerrahmen besteht aus einem Gußteil mit zwischen den Zylindern und an den beiden Enden des Zylinderkopfes quer zur Längsrichtung verlaufenden Stegen sowie mit zwei in Längsrichtung parallel verlaufenden Stegen, die auf den seitlichen Gehäusewänden des Zylinderkopfes aufliegen. In den quer verlaufenden Stegen sind untere Lagerhalbschalen für die Lager von Nockenwellen ausgebildet, deren obere Hälften durch voneinander getrennte, auf den Nockenwellen-Lagerrahmen aufschraubbare Lagerdeckel gebildet werden. Dieser Lagerrahmen ermöglicht eine separate Vormontage der Nockenwellen mit ihren Lagern. Nachteilig bei dieser Ausführung ist, daß trotz der separaten Nockenwellenlagerung ein aufwendig gestaltetes Zylinderkopfgehäuse verbleibt, das z.B. aufgrund der darin angeordneten Aufnahmen für die Tassenstößel Hinterschneidungen aufweist und somit nur mit verlorenem Kern gegossen werden kann. Das dabei entstehende Gefüge und die Oberfläche sind bezüglich der Festigkeit nicht optimal.
In der DE 38 19 655 ist ein Vierventil-Zylinderkopf für eine Brennkraftmaschine offenbart, in der die Aufnahmen für die Tassenstößel paarweise brillenartig zusammengefaßt sind. Dieser Zylinderkopf weist eine komplizierte Formgebung auf, die aufgrund der vielen Hinterschneidungen auf der der Brennraumseite gegenüberliegenden Deckseite ein Sandgußverfahren erforderlich macht. Dieses Verfahren benötigt eine gründliche und zeitaufwendige Reinigung der Deckseite nach dem Gießen.From DE-36 41 129 C1 a camshaft bearing frame for an internal combustion engine with four valves per cylinder is known, which is screwed onto the cylinder head base housing as a separate part. This bearing frame consists of a cast part with webs running transversely to the longitudinal direction between the cylinders and at the two ends of the cylinder head, and with two webs running parallel in the longitudinal direction, which rest on the lateral housing walls of the cylinder head. Lower half-shells for the bearings of camshafts are formed in the transverse webs, the upper halves of which are formed by separate bearing covers which can be screwed onto the camshaft bearing frame. This bearing frame enables the camshafts and their bearings to be pre-assembled separately. A disadvantage of this design is that, despite the separate camshaft bearing, an elaborately designed cylinder head housing remains which, for example, has undercuts due to the receptacles arranged therein for the tappets and can therefore only be cast with a lost core. The resulting structure and the surface are not optimal in terms of strength.
Es ist die Aufgabe der Erfindung, einen Zylinderkopf hoher Steifigkeit für eine Brennkraftmaschine zu schaffen, der die vorgenannten Nachteile vermeidet und es somit ermöglicht, diesen Zylinderkopf in einem einfachen Gußverfahren herzustellen. Weiterhin soll dieser Zylinderkopf maschinell montierbar sein.It is the object of the invention to provide a cylinder head of high rigidity for an internal combustion engine which avoids the aforementioned disadvantages and thus makes it possible to produce this cylinder head in a simple casting process. Furthermore, this cylinder head should be mechanically mountable.
Diese Aufgabe wird durch die Merkmale des Anspruchs 1 gelöst. Weitere, die Erfindung vorteilhaft ausgestaltende Merkmale enthalten die Unteransprüche. Von besonderem Vorteil bei dieser Erfindung ist es, daß sowohl die Nockenwellenlagerung als auch die der Führung der Tassenstößel dienenden Aufnahmen aus dem Zylinderkopfgehäuse herausgelöst sind. Dadurch ist die dem Brennraum zugewandte Unterseite und die dieser Unterseite gegenüberliegende Zylinderkopfdeckseite aufgrund der einfachen Formgebung in einem gemeinsamen Gußverfahren, z.B. Kokillenguß herstellbar. Das dabei entstehende Gußgefüge weist eine große Homogenität und gegenüber den bekannten Lösungen verbesserte Werkstoffkennwerte auf. Das Risiko von Rißbildungen im Zylinderkopfgehäuse ist dadurch deutlich verringert.
Der Träger ist unabhängig vom Zylinderkopfgehäuse im Druckgußverfahren herstellbar und anschließend kostengünstig zu bearbeiten. Trägerober- und -unterteil umfassen jeweils Teile eines Mittelsteges sowie Teile von mehreren Querstegen. Zur Aussteifung der Querstege sind keine gesonderten, gewichtserhöhenden Längsstege im Träger angeordnet, vielmehr wird diese Funktion von beiderseits des Mittelsteges im Trägerunterteil verlaufenden Streben übernommen, die Tassenstößel führende Aufnahmen umfassen, welche untereinander über Brücken verbunden sind. Jede Aufnahme ist wiederum über mindestens eine Stütze an dem im Trägerunterteil verlaufenden Teil des Mittelsteges abgestützt. Bei einer bevorzugten Anwendung in einer Brennkraftmaschine mit jeweils zwei Einlaß- und zwei Auslaßventilen pro Zylinder sind die der Tassenstößellagerung dienenden, paarweise zusammenwirkenden Aufnahmen eines Zylinders über eine als Rippe ausgebildete Brücke miteinander verbunden, während die Brücke zwischen zu benachbarten Zylindern gehörende Aufnahmen als Lagerunterteile von Lagern für zwei Nockenwellen ausgebildet ist. Somit entsteht ein leichtgewichtiger, steifer Träger, dessen Streben durch ihre Gestaltung zur Aussteifung des Trägers beitragen und als Lagerung für Tassenstößel wirken.
In einer anderen Ausführung der Erfindung sind die paarweise zusammenwirkenden Aufnahmen eines Zylinders über eine als Lagerunterteil eines Lagers einer Nockenwelle ausgebildete Brücke verbunden, wobei die Brücke zwischen zu benachbarten Zylindern gehörende Aufnahmen über eine als Rippe ausgebildete Brücke verbunden sind.This object is solved by the features of
The carrier can be produced independently of the cylinder head housing using the die casting process and can then be machined inexpensively. Upper and lower girder sections each include parts of a central web and parts of several cross webs. To stiffen the crossbars, no separate, weight-increasing longitudinal webs are arranged in the carrier, rather this function is performed by struts running on both sides of the central web in the lower part of the carrier, which include tappet-guiding receptacles which are connected to one another by bridges. Each receptacle is in turn supported by at least one support on the part of the central web running in the lower part of the carrier. In a preferred application in an internal combustion engine, each with two intake and two exhaust valves per cylinder, the tappet bearing, pair-cooperating receptacles of a cylinder are connected to one another via a bridge designed as a rib, while the bridge between receptacles belonging to adjacent cylinders is used as bearing bottoms of bearings is designed for two camshafts. This creates a lightweight, stiff carrier, the struts of which contribute to stiffening the carrier and act as a bearing for cup tappets.
In another embodiment of the invention, the pairs of cooperating receptacles of a cylinder are connected via a bridge designed as a bearing lower part of a bearing of a camshaft, the bridge between receptacles belonging to adjacent cylinders being connected via a bridge designed as a rib.
In beiden Ausführungen der Erfindung erweitert sich der Mittelsteg oberhalb jedes Zylinders kreisringförmig zu mindestens einem Ringelement. Die von den Ringelementen gebildeten Durchgangsöffnungen gestatten das Montieren einer Zündkerze oder einer Einspritzvorrichtung. Bei einer weiteren Ausführung mit zwei Ringelementen oberhalb jedes Zylinders läßt sich beispielsweise eine Doppelzündung realisieren, wobei dann bevorzugt zwei Ventile pro Zylinder angeordnet sind.
Bei allen Ausführungen der Erfindung ist die Kontur des Trägeroberteils der des Trägerunterteils angepaßt, d.h., es trägt eine dementsprechende Anzahl von Ringelementen im Mittelsteg und die Lageroberteile für die Lager der Nockenwellen sind jeweils über den als Lagerunterteil ausgebildeten Brücken des Trägerunterteils angeordnet. Zur weiteren Aussteifung des Trägers können im Trägeroberteil zwischen den Querstegen Versteifungsrippen angeordnet sein. Er ist somit vorteilhaft bei selbst- wie auch bei fremdgezündeten Brennkraftmaschinen mit zwei oder mehr Ventilen pro Zylinder sowie einfacher oder doppelter Zündkerzenanordnung verwendbar.In both embodiments of the invention, the central web extends in a ring shape above each cylinder to form at least one ring element. The through openings formed by the ring elements allow the installation of a spark plug or an injection device. In a further embodiment with two ring elements above each cylinder, for example, double ignition can be implemented, in which case two valves are then preferably arranged per cylinder.
In all embodiments of the invention, the contour of the upper part of the carrier is adapted to that of the lower part of the carrier, ie it carries a corresponding number of ring elements in the central web and the upper parts of the bearings for the bearings of the camshafts are each arranged above the bridges of the lower part of the carrier which are designed as lower parts of the bearing. To further stiffen the girder, stiffening ribs can be arranged in the upper girder part between the transverse webs. It can thus be used advantageously in both internal and externally ignited internal combustion engines with two or more valves per cylinder and single or double spark plug arrangement.
Ein weiterer, wichtiger Vorteil ist darin zu sehen, daß durch die Erfindung große Freiheiten bei der Ventillage bezüglich des Brennraumes sowie bei der Anordnung der Zylinderkopfschrauben gegeben sind. Bei einer Brennkraftmaschine mit z.B. vier Ventilen pro Zylinder, die sphärisch zum Brennraum angeordnet sind, ist eine beanspruchungsgerechte und leicht zugängliche Anordnung der Zylinderkopfschrauben bei im Zylinderkopfgehäuse angeordneten Tassenstößelführungen und gleichzeitiger Forderung nach geringster Baulänge der Brennkraftmaschine nicht zu erfüllen. Erst das erfindungsgemäße Herauslösen der Nockenwellenlagerung und der Tassenstößel ermöglicht freie Zugänglichkeit zu den Bohrungen im Zylinderkopfgehäuse, die der Durchgangsöffnung der Zylinderkopfschrauben dienen und ermöglicht eine belastungsgerechte Anordnung dieser Bohrungen in Bereichen maximaler Festigkeit des darunterliegenden Zylinderblockes.Another important advantage can be seen in the fact that the invention provides great freedom in the valve position with respect to the combustion chamber and in the arrangement of the cylinder head screws. In an internal combustion engine with e.g. Four valves per cylinder, which are arranged spherically to the combustion chamber, cannot meet the load-bearing and easily accessible arrangement of the cylinder head screws with bucket tappet guides arranged in the cylinder head housing and at the same time demand for the smallest overall length of the internal combustion engine. It is only when the camshaft bearing and the tappets are removed that the holes in the cylinder head housing, which are used for the through-opening of the cylinder head bolts, are freely accessible, and these holes can be arranged in a manner suitable for the load in areas of maximum strength of the cylinder block underneath.
Die Zylinderkopfmontage erfordert zunächst das Einführen der Ventile in das Zylinderkopfgehäuse und das Anbringen der Zylinderkopfschrauben. Anschließend werden die Ventilfedern sowie die Ventilteller angebracht. Im Anschluß daran kann entweder der komplett vormontierte Träger als gesamte Einheit auf das Zylinderkopfgehäuse geschraubt werden oder aber dessen Einzelteile aufeinanderfolgend montiert werden. Im letzteren Fall werden zunächst das Trägerunterteil eingelegt und die Tassenstößel in die Aufnahmen geführt. Anschließend werden die Nockenwellen eingelegt und das Trägeroberteil auf das Trägerunterteil geschraubt, ebenso wie der gesamte Träger auf das Zylinderkopfgehäuse.Cylinder head assembly first requires inserting the valves into the cylinder head housing and attaching the cylinder head bolts. Then the valve springs and the valve plates are attached. Following this, either the completely pre-assembled carrier can be screwed onto the cylinder head housing as a complete unit, or its individual parts can be assembled one after the other. In the latter case, the first will be Lower part of the carrier inserted and the tappets inserted into the receptacles. The camshafts are then inserted and the upper part of the beam is screwed onto the lower part of the beam, as is the entire beam on the cylinder head housing.
Der Träger kann komplett maschinell vormontiert werden und anschließend maschinell am Zylinderkopfgehäuse angebracht werden.The carrier can be completely pre-assembled by machine and then mechanically attached to the cylinder head housing.
Ein bevorzugtes Ausführungsbeispiel der Erfindung wird anhand der nachfolgend aufgeführten Figuren erläutert.A preferred embodiment of the invention is explained with reference to the figures listed below.
Es zeigt
- Fig. 1
- eine Draufsicht eines Zylinderkopfes, unterteilt in aufeinander folgende Abschnitte der Montage,
- Fig. 2
- einen Schnitt entlang der Linie II-II gemäß Fig. 1,
- Fig. 3
- einen Schnitt entlang der Linie III-III gemäß Fig. 1,
- Fig. 4
- einen Schnitt entlang der Linie IV-IV gemäß Fig. 1
- Fig. 5
- eine weitere Ausführung der Erfindung.
- Fig. 1
- a plan view of a cylinder head, divided into successive sections of the assembly,
- Fig. 2
- 2 shows a section along the line II-II according to FIG. 1,
- Fig. 3
- 2 shows a section along the line III-III according to FIG. 1,
- Fig. 4
- a section along the line IV-IV of FIG. 1st
- Fig. 5
- a further embodiment of the invention.
Der Zylinderkopf 1 einer mehrzylindrigen Brennkraftmaschine weist ein auf einem Zylinderblock 2 angeordnetes Zylinderkopfgehäuse 3 und einen darauf montieren Träger 4 auf, in dem Nockenwellen 5 in Lagern 6 angeordnet sind. Der Zylinderkopf 1 weist pro Zylinder vier sphärisch angeordnete Ventile 7 mit ihnen zugeordneten Federn 8 und Federtellern 9 auf. Die Ventile 7 werden von konischen Nocken 10 unmittelbar über Tassenstößel 11 betätigt. Die Mittellängsachsen V der Ventile 7, entlang derer die Ventile 7 bewegt werden, schneiden die Mittellängsachsen N der jeweiligen Nockenwelle 5. Der Träger 4 besteht aus einem Trägeroberteil 12 und einem Trägerunterteil 13. Ferner weist der Träger 4 einen als Längssteg 14 verlaufenden Mittelsteg 15 auf, der parallel zur Kurbelwelle der Brennkraftmaschine verläuft und im Trägeroberteil 12 sowie im Trägerunterteil 13 ausgebildet ist. Beiderseits des Mittelsteges 15 und parallel dazu beabstandet verlaufen im Trägerunterteil 13 Streben 16, die aus Aufnahmen 17 für die Tassenstößel 11 und diese Aufnahmen 17 verbindende Brücken 18 gebildet sind. Die Aufnahmen 17 sind koaxial zu den Mittellängsachsen V der Ventile 7 angeordnet. Quer zu dem Mittelsteg 15 und den Streben 16 verlaufen Querstege 19, die im Trägeroberteil 12 und im Trägerunterteil 13 ausgebildet sind. In der zwischen Trägeroberteil 12 und Trägerunterteil 13 verlaufenden, planen Trennebene 20 verlaufen die Mittellängsachsen N der Nockenwelle 5. Die Lager 6 sind jeweils aus Lageroberteil 21 im Trägeroberteil 12 und als Lagerunterteil 22 im Trägerunterteil 13 gebildet.
Jede Aufnahme 17 ist als Führungshülse ausgebildet über mindestens eine Stütze 23 am Trägerunterteil 13 angebunden. Die Streben 16 verlaufen mit den Stützen 23 unterhalb der Trennebene 20.
Oberhalb jedes Zylinders der Brennkraftmaschine erweitet sich der Mittelsteg 15 kreisringförmig zu einem Ringelement 24, welches dabei eine Durchgangsöffnung 25 umschließt und konzentrisch zur Zylinderlängsachse Z angeordnet ist. Sie ermöglicht das Einschieben eines Tubus 26, der den Zugang zu einer Zündkerze 27 ermöglicht.
Im Träger 4 ist ein Schmiermittelkanalsystem angeordnet, welches an den Schmierölkreislauf der Brennkraftmaschine angeschlossen ist. Dieses System umfaßt Kanäle 28, 29, 30, wobei die Kanäle 28, 29 innerhalb des Trägeroberteiles 12 im Mittelsteg 15 und in den Querstegen 19 verlaufen und die Kanäle 30 in den Stützen 23 angeordnet sind. Der Kanal 28 ist an einer nicht gezeigten, beliebigen Stelle an den Schmierölkreislauf der Brennkraftmaschine angeschlossen und dient als Verteiler für das Schmieröl in die Kanäle 29, 30. Die Durchgangsöffnungen 25 werden vom Kanal 28 gleichmäßig umströmt, so daß die im Bereich der Ringelemente 24 an das Trägerunterteil 13 angeschlossene Kanäle 30 die Aufnahmen 17 mit Schmieröl zur Führung der Tassenstößel versorgen. Im Bereich der Querstege 19 zweigen Kanäle 30 vom Kanal 28 ab und führen Schmieröl zu den Lagern 6 der Nockenwellen 5.The
Each
Above each cylinder of the internal combustion engine, the
A lubricant channel system is arranged in the
Zwischen zwei nebeneinanderliegenden, zu benachbarten Zylindern gehörenden Aufnahmen 17 sind erste Brücken 18 als die Lagerunterteile 22 ausgeführt. Im Bereich dieser Lagerunterteile 22 sind zwischen den Streben 16 verlaufend die Querstege 19 angeordnet und einteilig mit den Lagerunterteilen 22 ausgeführt. Unterhalb der Lagerunterteile 22 weisen die Querstege 19 Vorsprünge 32 auf, die dafür sorgen, daß die benachbart eines Quersteges 19 liegenden Aufnahmen 17 über ihre gesamte Bauhöhe steif miteinander verbunden sind.Between two
Zweite Brücken 18 sind zwischen den zu einem Zylinder gehörenden Aufnahmen 17 als Rippen 31 ausgeführt. Diese Rippen 31 können entfallen, wenn bei einem geringen Abstand der zugehörigen Aufnahmen 17 diese direkt zusammengegossen werden.
In dem im Trägeroberteil 12 verlaufenden Teil der Querstege 19 sind die Lageroberteile 21 ausgebildet. Beiderseits der Lageroberteile 21 und im Bereich des Mittelsteges 15 sind im Trägeroberteil 12 Bohrungen 33 angeordnet, die gemeinsam mit weiteren Bohrungen 33 im Trägerunterteil 13 und im Zylinderkopfgehäuse 3 Schraubverbindungen 34, 35 ermöglichen.The
Beim Zusammenbau des zuvor beschriebenen Teiles wird zunächst das Zylinderkopfgehäuse 3 mit Zylinderkopfschrauben 36 am Zylinderblock 2 befestigt, nachdem die Ventile 7 in entsprechende Führungen geschoben wurden. Zur Aufnahme der Zylinderkopfschrauben 36 sind im Zylinderkopfgehäuse Bohrungen 37 vorgesehen. Anschließend werden die Federn 8 und die Federteller 9 an den Ventilen 7 angebracht. Zu diesem Zeitpunkt ergibt sich das in Fig. 1 in dem mit A bezeichneten Abschnitt dargestellte Bild für den gesamten Zylinderkopf. Im Anschluß daran kann, wie bereits in der Beschreibungseinleitung erwähnt, der komplett mit den Nockenwellen 5 und den Tassenstößeln 11 bestückte Träger 4 als gesamte Einheit oder aber in Einzelteilen aufeinanderfolgend montiert werden. Letzere Möglichkeit wird im folgenden näher beschrieben.When assembling the part described above, the
Das Trägerunterteil 13 wird zunächst an drei Berührungsflächen 38 auf das Zylinderkopfgehäuse 3 gelegt, anschließend werden die Tassenstößel 11 in die Aufnahmen 17 geschoben. Es ergibt sich das in dem mit B bezeichneten Abschnitt in Fig. 1 dargestellte Bild für den gesamten Zylinderkopf.The carrier
Nach dem einlegen der Nockenwellen 5 in die Lagerunterteile 22 (Abschnitt C in Fig. 1) wird das Trägeroberteil 12 mit den Schraubverbindungen 34 am Trägerunterteil 13 fixiert. Die Schraubverbindungen 35 durchdringen die Berührungsflächen 38 und verspannen das Trägerunterteil 13 zwischen Zylinderkopfgehäuse 3 und Trägeroberteil 12 und befestigen den Träger 4 im Zylinderkopf 1 (Abschnitt D in Fig. 1). Abschließend wird eine Haube 39 auf den Zylinderkopf 1 aufgesetzt. Diese Haube 39 umschließt den Träger 4 U-förmig und liegt auf einem Flansch 40 auf, der gemeinsam mit den Berührungsflächen 38 bearbeitet werden kann. Vorteilhafterweise ist die zwischen Haube 39 und Flansch 40 liegende Fläche völlig plan und weist keinerlei Bohrungen auf, so daß eine einfach Abdichtung möglich ist.After inserting the
In die Durchgangsöffnung 25 wird der Tubus 26 gesteckt, der den Zündkerzenbereich mittels zweier Dichtungen 41 in einer Öffnung 42 der Haube 39 und in einer Haltung 43 im Zylinderkopfgehäuse 3 abdichtet. Die Anordnung der Schraubverbindungen 34, 35 in der Ebene, in der die Zylinderkopfschrauben angeordnet sind, ermöglicht eine optimale, belastungsgerechte Krafteinleitung vom Träger 4 bis in den Zylinderblock 2.The
Wie in der Beschreibungseinleitung erwähnt, kann die Erfindung auch vorteilhaft bei Brennkraftmaschinen mit z.B. zwei oder drei Ventilen pro Zylinder angewendet werden. Bei zwei Ventilen 7 liegen sich die entsprechenden Aufnahmen 17 in einer Ebene gegenüber, die parallel zu und in der Mitte von zwei Querstegen 19 liegt. In einer Ausführung mit Doppelzündung und zwei Ventilen, liegen sich vorteilhafterweise zwei Aufnahmen 17 zwischen zwei Querstegen 19 diagonal gegenüber. Der Mittelsteg 15 weist dann für jeden Zylinder zwei Ringelemente 24 auf, welche sich ebenfalls diagonal gegenüberliegen können.As mentioned in the introduction to the description, the invention can also be advantageous in internal combustion engines with e.g. two or three valves per cylinder can be used. In the case of two
Gemäß Fig. 5 sind bei einer weiteren Ausführung der Erfindung die Querstege 19 oberhalb jedes Zylinders der Brennkraftmaschine angeordnet und nehmen dabei jeweils ein Ringelement 24 auf. Jeweils zwei einem Zylinder zugeordnete Aufnahmen 17 sind unterhalb eines als Brücke 18 wirkenden Lagerunterteiles 22 zusammengegossen. Zwei nebeneinanderliegende, zu benachbarten Zylindern gehörende Aufnahmen 17 sind durch eine Rippe 31 verbunden.5, in a further embodiment of the invention, the
Claims (16)
- A cylinder head (1) of a multiple-cylinder internal-combustion engine, with a support (4) detachably mounted on a cylinder-head housing (3) and having lower parts (22) of bearings (6) for receiving camshafts (5), and with upper parts (21) of bearings mounted on the support, wherein the camshafts (5) act upon valves (7) actuated by way of cup tappets (11) and the support comprises receiving means (17) for the said cup tappets and external longitudinal webs (14), extending at a distance from one another and parallel to the direction of the crankshaft, and transverse webs (19), extending at right angles thereto, the bearings (6) being constructed in the said webs, characterized in that the external longitudinal webs (14) are constructed in the form of struts (16), the said struts (16) being formed from the receiving means (17) for the cup tappets (11) and bridges (18) connecting the said receiving means (17), wherein each receiving means (17) constructed as a guide sleeve is connected by means of a first bridge (18) to a transverse web (19) and by means of a second bridge (18) to an adjacent guide sleeve, and a central web (15) connecting transverse webs (19) to one another is arranged between the struts (16).
- A cylinder head according to Claim 1, characterized in that the central web (15) and the transverse webs (19) are each constructed in an upper part (12) and a lower part (13) forming the support (4).
- A cylinder head according to Claim 2, characterized in that the struts (16) are formed in the lower support part (13).
- A cylinder head according to Claim 1, characterized in that the central web (15) is enlarged in an arcuate manner above each cylinder of the internal-combustion engine to form at least one annular member (24) and encloses a respective through opening (25).
- A cylinder head according to Claim 2, characterized in that first bolt connexions (37) connecting the upper support part (12) and the support lower part (13) together and second bolt connexions (35) holding the support (4) and the cylinder-head housing (3) are arranged in the transverse webs (19).
- A cylinder head according to Claim 5, characterized in that the receiving means (17) are arranged coaxially with the median longitudinal axes (V) of the valves (7).
- A cylinder head according to Claim 1, characterized in that two adjacent receiving means (17) connected by way of a rib (31) are each arranged above a cylinder of the internal-combustion engine (Fig. 1).
- A cylinder head according to Claim 1, characterized in that two adjacent receiving means (17) connected by way of a lower bearing part (22) are each arranged above a cylinder of the internal-combustion engine (Fig. 5).
- A cylinder head according to Claims 4 and 7, characterized in that the transverse webs (19) extend between adjacent annular members (24), and the transverse webs (19) embrace lower bearing parts (22) (Fig. 1).
- A cylinder head according to Claims 4 and 8, characterized in that an annular member (24) is arranged coaxial with the cylinder axis (Z) above each cylinder of the internal-combustion engine, and the transverse webs (19) embrace the annular member (24).
- A cylinder head according to Claim 2, characterized in that each receiving means (17) has a bracket (23) formed integrally with the lower support part (13) and connected to the central web (15).
- A cylinder head according to Claim 1, characterized in that a lubricant duct system, supplying the bearings (20) and the receiving means (17) and comprising ducts (28, 29, 30), is provided in the support (4).
- A cylinder head according to Claims 2 and 12, characterized in that the duct (28) is arranged in the central web (15) above the plane (20) extending between the upper support part (12) and the lower support part (13), and the ducts (29) in the transverse webs (19) above this plane (20) are arranged branching off from the duct (28).
- A cylinder head according to Claims 4, 11 and 12, characterized in that the ducts (30) are arranged extending centrally in the brackets (23) and are connected to the duct (28) extending in the annular member (24).
- A cylinder head according to Claim 4, characterized in that the support (4) is surrounded in a U-shaped manner by a hood (39) resting on a flange (40) of the cylinder-head housing (3) and provided with openings (42), wherein an inserted tube (26) extends between the through openings (25) and the said openings (42).
- A cylinder head according to Claim 15, characterized in that the tube (26) is sealed off from the hood (39) by means of a seal (41), and a sparking plug (27) or an injection device extends inside the tube (26).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3940845 | 1989-12-11 | ||
DE3940845A DE3940845C1 (en) | 1989-12-11 | 1989-12-11 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0436779A1 EP0436779A1 (en) | 1991-07-17 |
EP0436779B1 true EP0436779B1 (en) | 1993-12-29 |
Family
ID=6395216
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90116952A Expired - Lifetime EP0436779B1 (en) | 1989-12-11 | 1990-09-04 | Cylinder head for internal-combustion engine |
Country Status (5)
Country | Link |
---|---|
US (1) | US5080057A (en) |
EP (1) | EP0436779B1 (en) |
JP (1) | JPH0491351A (en) |
DE (5) | DE3943728C2 (en) |
ES (1) | ES2047785T3 (en) |
Families Citing this family (58)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USRE35382E (en) * | 1989-07-14 | 1996-11-26 | Yamaha Hatsudoki Kabushiki Kaisha | Lubrication arrangement for engine |
DE4116944C2 (en) * | 1991-05-24 | 1997-05-22 | Daimler Benz Ag | Cylinder head for a multi-cylinder internal combustion engine |
DE4116942C1 (en) * | 1991-05-24 | 1992-05-27 | Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De | Cylinder head for multicylinder IC engine - has accessory cover bolts with oil bores for guiding oil to bearing points and valve tappets |
US5301641A (en) * | 1991-11-06 | 1994-04-12 | Honda Giken Kogyo Kabushiki Kaisha | Internal combustion engine |
JP2570789Y2 (en) * | 1992-08-27 | 1998-05-13 | 本田技研工業株式会社 | Engine cam carrier structure |
US5522354A (en) * | 1993-10-29 | 1996-06-04 | Yamaha Hatsudoki Kabushiki Kaisha | Valve mechanism for internal combustion engine |
US6209507B1 (en) | 1992-10-19 | 2001-04-03 | Yamaha Hatsudoki Kabushiki Kaisha | Valve mechanism for internal combustion engine |
US5347964A (en) * | 1993-09-07 | 1994-09-20 | Chrysler Corporation | Valve train for internal combustion engines |
JPH07103067A (en) * | 1993-09-30 | 1995-04-18 | Suzuki Motor Corp | Structure for cylinder head |
DE4410122C2 (en) * | 1994-03-24 | 2003-05-08 | Ina Schaeffler Kg | Connection of a guide rail of a valve actuation device to a camshaft bearing |
DE69414557T2 (en) * | 1994-06-15 | 1999-04-01 | Yamaha Motor Co Ltd | Cylinder head arrangement for a multi-valve internal combustion engine with an overhead camshaft |
DE4421057C1 (en) * | 1994-06-16 | 1995-09-14 | Porsche Ag | Cylinder head arrangement for IC engine |
DE4435299A1 (en) * | 1994-10-01 | 1996-04-04 | Bayerische Motoren Werke Ag | Cylinder cylinder head with cast longitudinal oil channel |
US5570665A (en) * | 1995-04-04 | 1996-11-05 | Chrysler Corporation | Valve train for internal combustion engine |
US5511520A (en) * | 1995-07-03 | 1996-04-30 | Chrysler Corporation | Cylinder head construction |
DE19600448C1 (en) * | 1996-01-09 | 1997-04-10 | Daimler Benz Ag | Liquid-cooled cylinder head for multicylinder engine |
US5939103A (en) * | 1996-01-22 | 1999-08-17 | Erikson; Jon R. | Gas nozzle assembly for a gas assisted injection molding system |
DE19605934C1 (en) * | 1996-02-17 | 1997-06-12 | Audi Ag | Cylinder head for IC engine with direct fuel injection |
DE19621636C2 (en) * | 1996-05-30 | 1999-03-11 | Audi Ag | Device for lubricating the cams of a camshaft |
US5669344A (en) * | 1996-08-09 | 1997-09-23 | Chrysler Corporation | Sohc system with radial valves |
US5651337A (en) * | 1996-08-09 | 1997-07-29 | Chrysler Corporation | Carrier for camshaft and tappet support |
DE19712658A1 (en) * | 1997-03-26 | 1998-10-01 | Schaeffler Waelzlager Ohg | Cylinder head with cylinders stepped for camshaft bearings |
DE19723342C1 (en) * | 1997-06-04 | 1998-09-03 | Vaw Mandl & Berger Gmbh | Cylinder head with casting core for oilduct fabrication in multi-cylinder IC engine |
DE19728947C2 (en) * | 1997-07-07 | 2001-03-15 | Audi Ag | Internal combustion engine with a cylinder head |
DE19729948A1 (en) * | 1997-07-12 | 1999-01-14 | Deutz Ag | Camshaft bearing frame |
JP3847428B2 (en) * | 1997-11-19 | 2006-11-22 | ヤマハ発動機株式会社 | Cylinder head structure of internal combustion engine |
DE19801606A1 (en) * | 1998-01-17 | 1999-07-22 | Audi Ag | Cylinder head |
DE19808718A1 (en) * | 1998-03-02 | 1999-09-09 | Audi Ag | Lubricator device for cylinder head of especially multi-cylinder IC engine |
DE29803618U1 (en) | 1998-03-03 | 1998-06-10 | Kuntschar, Walter, 34466 Wolfhagen | Cylinder head or part of a cylinder head of an internal combustion engine with in particular four valves |
DE69913251T2 (en) * | 1998-06-24 | 2004-05-27 | Yamaha Hatsudoki K.K., Iwata | Valve control device for an internal combustion engine |
DE19833533A1 (en) * | 1998-07-25 | 2000-01-27 | Audi Ag | Cylinder head for stroke piston internal combustion engine with at lest two cylinders in row involvs each cylinder havng at least one inlet and outlet channel evolving from combustion chamber plate |
DE19833531A1 (en) * | 1998-07-25 | 2000-01-27 | Audi Ag | Cylinder head for stroke piston internal combustion engine involves at least two cylinders in row, each cylinder having at least one inlet and outlet channel evolving from combustion |
JP2000087796A (en) * | 1998-09-14 | 2000-03-28 | Honda Motor Co Ltd | Cylinder head for dohc engine |
JP4067068B2 (en) * | 1998-09-14 | 2008-03-26 | 本田技研工業株式会社 | 4-cycle engine |
MY141693A (en) * | 1999-06-07 | 2010-06-15 | Mitsubishi Motors Corp | Internal combustion engine |
JP2001090513A (en) * | 1999-09-27 | 2001-04-03 | Yamaha Motor Co Ltd | Mounting structure for valve lifter |
KR20010037508A (en) * | 1999-10-18 | 2001-05-07 | 이계안 | Dohc diesel engine |
DE19959989A1 (en) | 1999-12-13 | 2001-06-21 | Audi Ag | Bearing at least one camshaft |
JP4396024B2 (en) | 2000-03-13 | 2010-01-13 | マツダ株式会社 | Cylinder head structure |
DE10032003A1 (en) | 2000-06-30 | 2002-01-10 | Fev Motorentech Gmbh | Piston-type internal combustion engine with a rigid yoke for the sealing fastening of fuel injection devices |
US6330872B1 (en) * | 2000-08-16 | 2001-12-18 | Cummins Engine Company, Inc. | Cylinder head casting with gusset ribs |
DE10117163A1 (en) * | 2001-04-06 | 2002-10-10 | Bayerische Motoren Werke Ag | Insert tube for a cylinder head with a cover of an internal combustion engine |
KR20020094565A (en) * | 2001-06-12 | 2002-12-18 | 현대자동차주식회사 | Cam shaft fixed device of engine |
US20050120992A1 (en) * | 2002-06-15 | 2005-06-09 | Ulrich Rieger | Cylinder head of a reciprocating piston internal combustion engine |
DE10250303A1 (en) | 2002-10-29 | 2004-05-19 | Bayerische Motoren Werke Ag | Cylinder head of an internal combustion engine with a camshaft bearing strip |
JP3788437B2 (en) | 2003-03-20 | 2006-06-21 | 日産自動車株式会社 | Internal combustion engine and integrated cam bracket thereof |
AT500411B8 (en) * | 2004-11-25 | 2007-02-15 | Avl List Gmbh | CYLINDER HEAD ARRANGEMENT FOR AN INTERNAL COMBUSTION ENGINE |
JP2006220073A (en) * | 2005-02-10 | 2006-08-24 | Toyota Motor Corp | Mounting structure of sensor for internal combustion engine and cam cap assembly |
JP4218715B2 (en) * | 2006-08-31 | 2009-02-04 | トヨタ自動車株式会社 | cylinder head |
JP4983568B2 (en) * | 2007-11-27 | 2012-07-25 | トヨタ自動車株式会社 | Cam carrier and manufacturing method thereof |
JP5315185B2 (en) * | 2009-09-16 | 2013-10-16 | 本田技研工業株式会社 | Ignition device mounting structure for internal combustion engine |
CN102797585A (en) * | 2012-08-08 | 2012-11-28 | 重庆百吉四兴压铸有限公司 | Diesel engine box |
DE102012217366A1 (en) * | 2012-09-26 | 2014-03-27 | Mahle International Gmbh | Bearing arrangement for juxtaposed camshafts |
GB2513328A (en) * | 2013-04-23 | 2014-10-29 | Gm Global Tech Operations Inc | Cylinder head of an internal combustion engine |
US9103277B1 (en) | 2014-07-03 | 2015-08-11 | Daniel Sexton Gurney | Moment-cancelling 4-stroke engine |
CN107614857A (en) * | 2015-05-25 | 2018-01-19 | 日产自动车株式会社 | Internal combustion engine |
US11002156B2 (en) * | 2015-08-18 | 2021-05-11 | Eaton Intelligent Power Limited | Non-contacting actuator for rocker arm assembly latches |
WO2018075392A1 (en) * | 2016-10-17 | 2018-04-26 | Eaton Corporation | Auxiliary framework for electrically latched rocker arms |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3022775A (en) * | 1960-09-26 | 1962-02-27 | John Dolza | Cylinder heads for internal combustion engines |
DE1951254A1 (en) * | 1969-10-10 | 1971-04-22 | Linde Ag | Cylinder head for a preferably fluid-cooled piston engine in an in-line design with an overhead camshaft |
AT329323B (en) * | 1972-11-06 | 1976-05-10 | Denzel Kraftfahrzeug Wolfgang | CYLINDER HEAD FOR COMBUSTION MACHINERY |
US4660529A (en) * | 1981-04-22 | 1987-04-28 | Yamaha Hatsudoki Kabushiki Kaisha | Four-cycle engine |
JPH0646004B2 (en) * | 1984-04-11 | 1994-06-15 | ヤマハ発動機株式会社 | Camshaft holding structure for internal combustion engine |
JPS6149113A (en) * | 1984-08-15 | 1986-03-11 | Yamaha Motor Co Ltd | Valve moving device of interval-combustion engine |
JPS61167145A (en) * | 1985-01-19 | 1986-07-28 | Mazda Motor Corp | Cylinder-head structure of dohc multicylinder engine |
DE3513126A1 (en) * | 1985-04-12 | 1986-10-30 | Daimler-Benz Ag, 7000 Stuttgart | LIQUID-COOLED FOUR-VALVE CYLINDER HEAD FOR A MULTI-CYLINDER INTERNAL COMBUSTION ENGINE |
DE3546436A1 (en) * | 1985-04-12 | 1986-10-16 | Daimler-Benz Ag, 7000 Stuttgart | Liquid-cooled four-valve cylinder head for a multi cylinder internal combustion engine |
EP0262250B1 (en) * | 1986-10-02 | 1990-03-14 | Audi Ag | Four-stroke internal-combustion engine |
JP2537205B2 (en) * | 1986-07-09 | 1996-09-25 | 本田技研工業株式会社 | Valve train for internal combustion engine |
DE3641129C1 (en) * | 1986-12-02 | 1987-07-30 | Daimler Benz Ag | Device for mounting two camshafts in the cylinder head of a multi-cylinder in-line internal combustion engine |
DE3819655C1 (en) * | 1988-06-09 | 1989-01-26 | Daimler-Benz Ag, 7000 Stuttgart, De | |
JPH0716002Y2 (en) * | 1988-11-16 | 1995-04-12 | 日産工機株式会社 | DOHC engine |
-
1989
- 1989-12-11 DE DE3943728A patent/DE3943728C2/en not_active Expired - Fee Related
- 1989-12-11 DE DE3943729A patent/DE3943729C2/en not_active Expired - Fee Related
- 1989-12-11 DE DE3940845A patent/DE3940845C1/de not_active Expired - Lifetime
- 1989-12-11 DE DE3943727A patent/DE3943727C2/en not_active Expired - Fee Related
-
1990
- 1990-09-04 EP EP90116952A patent/EP0436779B1/en not_active Expired - Lifetime
- 1990-09-04 DE DE90116952T patent/DE59004034D1/en not_active Expired - Fee Related
- 1990-09-04 ES ES90116952T patent/ES2047785T3/en not_active Expired - Lifetime
- 1990-12-10 JP JP2401023A patent/JPH0491351A/en active Pending
- 1990-12-11 US US07/625,452 patent/US5080057A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE3943727C2 (en) | 1995-07-13 |
DE3943727A1 (en) | 1994-02-10 |
DE3943729A1 (en) | 1994-02-17 |
DE3943728A1 (en) | 1994-02-10 |
DE3943728C2 (en) | 1995-07-13 |
DE3943729C2 (en) | 1995-07-13 |
EP0436779A1 (en) | 1991-07-17 |
US5080057A (en) | 1992-01-14 |
JPH0491351A (en) | 1992-03-24 |
DE59004034D1 (en) | 1994-02-10 |
ES2047785T3 (en) | 1994-03-01 |
DE3940845C1 (en) | 1990-08-09 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0436779B1 (en) | Cylinder head for internal-combustion engine | |
EP0635631B1 (en) | Cylinder head arrangement for an internal combustion engine | |
DE3641129C1 (en) | Device for mounting two camshafts in the cylinder head of a multi-cylinder in-line internal combustion engine | |
EP0514643B1 (en) | Cylinder head for a multi cylinder internal combustion engine | |
EP0637682B1 (en) | Water-cooled multicylinder internal combustion engine with V-configuration arranged cylinders | |
DE102008062187A1 (en) | Internal combustion engine, particularly for vehicle, comprises screw pipes that are arranged at opposite ends on bearing traverses, such that bearing bores of bearing traverse, are located between screw pipes | |
WO2004040115A1 (en) | Cylinder head of an internal combustion engine having a camshaft bearing rail | |
EP0688946B1 (en) | Cylinder head layout of an internal combustion engine | |
EP1034358B1 (en) | Cylinder head for an internal combustion engine with a pump-jet unit | |
EP3842622B1 (en) | Device for rotatably supporting a camshaft | |
EP0515925B1 (en) | Cylinder head for combustion engine | |
DE3935883A1 (en) | Four-stage diesel engine - has individual fuel injection pumps for cylinders | |
EP0624717B1 (en) | Internal combustion engine with an adjuster unit to vary the phase of the camshafts drive | |
EP0845582A1 (en) | Valve control for an internal combustion engine provided with lift valves for the gas exchange | |
DE4212110A1 (en) | Valve gear for Diesel engine - has two camshafts to actuate gas exchange valves and individual fuel injection valves | |
DE2943560C2 (en) | Device for an internal combustion engine | |
DE19621636C2 (en) | Device for lubricating the cams of a camshaft | |
EP1108859B1 (en) | Bearing arrangement for a cam shaft | |
DE19723379B4 (en) | Cylinder head arrangement for an internal combustion engine | |
DE3401966A1 (en) | DEVICE FOR PRESSURE SUPPLYING SELF-ADJUSTABLE VALVE TOLES OF AN INTERNAL COMBUSTION ENGINE | |
EP0379719A1 (en) | Rocker arms arrangement in an internal-combustion engine | |
DE102017011484A1 (en) | Cylinder head device for an internal combustion engine | |
DE19846586B4 (en) | Method for producing a composite housing | |
DE4317090A1 (en) | Assembly sequence for vehicle IC engine - provides for insertion of gudgeon pins via through-bores in walls of cylinder crank housing |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE ES FR GB IT NL SE |
|
17P | Request for examination filed |
Effective date: 19910911 |
|
17Q | First examination report despatched |
Effective date: 19920923 |
|
ITF | It: translation for a ep patent filed |
Owner name: DE DOMINICIS & MAYER S. |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE ES FR GB IT NL SE |
|
REF | Corresponds to: |
Ref document number: 59004034 Country of ref document: DE Date of ref document: 19940210 |
|
GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 19940124 |
|
ET | Fr: translation filed | ||
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2047785 Country of ref document: ES Kind code of ref document: T3 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Effective date: 19940905 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: ES Payment date: 19940915 Year of fee payment: 5 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
EAL | Se: european patent in force in sweden |
Ref document number: 90116952.4 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Effective date: 19950401 |
|
NLV4 | Nl: lapsed or anulled due to non-payment of the annual fee | ||
EUG | Se: european patent has lapsed |
Ref document number: 90116952.4 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION Effective date: 19950905 |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FD2A Effective date: 19990601 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 19990901 Year of fee payment: 10 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 19990907 Year of fee payment: 10 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 19990930 Year of fee payment: 10 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20000904 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20000904 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010531 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010601 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED. Effective date: 20050904 |