EP0515925A1 - Cylinder head for combustion engine - Google Patents

Cylinder head for combustion engine Download PDF

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Publication number
EP0515925A1
EP0515925A1 EP92108224A EP92108224A EP0515925A1 EP 0515925 A1 EP0515925 A1 EP 0515925A1 EP 92108224 A EP92108224 A EP 92108224A EP 92108224 A EP92108224 A EP 92108224A EP 0515925 A1 EP0515925 A1 EP 0515925A1
Authority
EP
European Patent Office
Prior art keywords
cylinder head
channels
oil
valves
head according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP92108224A
Other languages
German (de)
French (fr)
Other versions
EP0515925B1 (en
Inventor
Jürgen Dipl.-Ing. Wahnschaffe
Lothar Bauer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kloeckner Humboldt Deutz AG
Original Assignee
Kloeckner Humboldt Deutz AG
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Publication of EP0515925A1 publication Critical patent/EP0515925A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00—Casting in, on, or around objects which form part of the product
    • B22D19/0009—Cylinders, pistons
    • 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
    • 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
    • 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
    • F02B75/00—Other engines
    • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18—Multi-cylinder engines
    • F02B2075/1804—Number of cylinders
    • F02B2075/1816—Number of cylinders four
    • 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 
    • F02F1/24—Cylinder heads
    • F02F2001/244—Arrangement of valve stems in cylinder heads
    • F02F2001/247—Arrangement of valve stems in cylinder heads the valve stems being orientated in parallel with the cylinder axis

Definitions

  • the invention relates to a cylinder head for an internal combustion engine according to the preamble of claim 1.
  • Such an internal combustion engine with the features of the preamble of claim 1 enables a favorable arrangement of an ignition device or an injection device in the center of the combustion chamber associated with each piston, in that the gas exchange valves can be arranged around the central ignition device or injection device in the cylinder head area assigned to a combustion chamber. Nevertheless, a reliable supply of lubricating oil and, if necessary, cooling oil to the camshaft bearings, the valves and the sliding surface between the camshaft and valve tappet must be ensured.
  • the known cylinder head has disadvantages, since long connections to the valves and the camshaft bearings are present from the oil channels arranged below the camshafts. These have to be manufactured in a complex manner.
  • the invention has for its object to provide a cylinder head for an internal combustion engine, in which a secure supply of lubricating oil to the camshaft bearings and the valves is ensured, the corresponding oil channels and connections should be easy and inexpensive to manufacture.
  • connections are designed as channels or recesses which are formed by casting cores when the cylinder head is cast, the short connections have a positive effect on the production process. Because the connections are short, the risk of breaking appropriately designed casting cores is low or no longer exists.
  • the casting cores of the oil channels and the channels and / or recesses branching off each oil channel are formed in one piece. This one-piece design enables a particularly efficient manufacturing process, since only one casting core has to be fixed in the mold for each oil channel, preferably at the ends of the cylinder head.
  • the oil channels are advantageously connected to one another via transverse channels.
  • the casting cores of the two oil passages of the cylinder head and the transverse passages connecting them can be formed in one piece. This means that only one core needs to be defined for each cylinder head for the entire oil supply to the cylinder head in the casting mold. However, this also minimizes the risk of core parts breaking off, so that the reject rate of unusable cylinder heads is further reduced.
  • branch channels to the camshaft bearings are connected to the transverse channels.
  • This solution is particularly useful if cross-channels are provided in the area between all adjacent cylinders.
  • the cores to the camshaft bearings can be formed as simple short branch channels from these transverse channels.
  • the casting cores of the transverse channels are preferably formed in one piece with the casting cores of the branch channels.
  • bearing cores are molded onto the casting cores of the channels or recesses to the valve tappets, which are locked between the valve spring core lower part and valve spring core upper part after the core assembly. This further stabilizes the entire core and further reduces the risk of damage to the core. This also eliminates the risk of the casting core "bending", particularly in the area of the oil channels.
  • the gas exchange valves are preferably arranged vertically, that is to say axially parallel in the cylinder head. This has the advantage of an uncomplicated casting core and simple workability, for example of the valve seats or valve seat rings.
  • the cylinder head according to FIG. 1 has four gas exchange valves per cylinder, which are arranged in recesses 1a, 1b, 1c, 1d for each cylinder.
  • the recesses 1a, 1b, 1c, 1d in FIG. 1 have a diameter which is designed to accommodate hydraulic tappets for valve clearance compensation.
  • the recesses 1a, 1b, 1c, 1d or the corresponding gas exchange valves and hydraulic tappets are arranged in relation to the combustion chamber of a cylinder in such a way that an opening 2 can be arranged in the center of the combustion chamber.
  • An ignition device, a prechamber or an injection nozzle can be inserted into the opening 2.
  • the cylinder head is fastened to the crankcase of the internal combustion engine with cylinder head screws, the cylinder head screws being passed through cylinder head screw pipes 3.
  • Connecting walls 4 extend between the cylinder head screw pipes 3.
  • oil channels 6a, 6b extend parallel to the axes of the camshafts 5a, 5b (FIG. 3).
  • the oil passes through inlets and outlets 7a, 7b or alternatively 7c, in this case 7b is closed and transverse channels 8a, 8b into the oil channels 6a, 6b.
  • further transverse channels 8c, 8d, 8e are provided between the individual cylinder units In the four-cylinder head shown.
  • all channels through which oil flows are formed by a single casting core.
  • the casting core is held by receptacles that protrude through the inlet and outlet, 7a, 7b, and by bearing cores that protrude into the recesses 1a, 1b, 1c, 1d for the valves and are locked between the valve spring lower part and the valve spring upper part.
  • FIG. 3 shows a section through an assembled cylinder head.
  • the cylinder head with the oil channels 6a, 6b is covered by a cylinder head cover 9.
  • Two camshafts 5a, 5b are mounted in the covered space, which actuate hydraulic tappets 11a, 11b with their cams 10a, 10b.
  • the hydraulic tappets 11a, 11b in turn act on valve stems 12a, 12b, which are connected to valve disks, not shown, for controlling the gas exchange of the internal combustion engine.
  • Channels 13a, 13b branch off from the oil channels 6a, 6b to the recesses 1a, 1b, 1c, 1d, in which the hydraulic tappets 11a, 11b and the valve stems 12a, 12b with the valve springs are arranged.
  • a cross-channel 8c with branch channels 14c ', 14c' 'to the camshaft bearings is shown in broken lines.
  • FIG. 4 shows a section III through an unmounted cylinder head in the area of cylinder head screw pipes 3 while FIG. 5 shows a section IV through the cylinder head in Area of the transverse channel 8d.
  • FIGS. 6 and 7 show sections through another embodiment of a cylinder head with oil channels 6a ', 6b'.
  • channels 13a, 13b branch off from the oil channels 6a ', 6b' to the recesses 1a, 1b, 1c, 1d of each cylinder.
  • the camshaft bearings are connected via recesses 15a, 15b connected to the oil channels 6a ', 6b'.
  • Cross channels are not provided in this embodiment.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (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)

Abstract

2.1 In the case of a known cylinder head with oil ducts for supplying the hydraulic tappets and camshaft bearing with lubricating oil costly mould cores which are difficult to form are necessary for its manufacture. The resulting risk of damage during construction of the mould and during the casting process is correspondingly high. 2.2 According to the invention the oil ducts 6a, 6b, 6a', 6b' are so arranged and so designed with connections to the recesses 1a, 1b, 1c, 1d for the hydraulic tappets or valves and to the camshaft bearings that the entire lubricating oil ducting system can be moulded by means of a single, robust mould core. <IMAGE>

Description

Die Erfindung betrifft einen Zylinderkopf für eine Brennkraftmaschine gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a cylinder head for an internal combustion engine according to the preamble of claim 1.

Eine derartige Brennkraftmaschine mit den Merkmalen des Oberbegriffs des Patentanspruchs 1 ermöglicht eine günstige Anordnung einer Zündeinrichtung oder einer Einspritzeinrichtung in der Mitte des jeden Kolbens zugeordneten Brennraums, indem die Gaswechselventile um die zentrale Zündeinrichtung oder Einspritzeinrichtung herum in dem einem Brennraum zugeordneten Zylinderkopfbereich angeordnet werden können. Gleichwohl ist eine zuverlässige Schmieröl- und gegebenenfalls Kühlölversorgung der Nockenwellenlager, der Ventile und der Gleitfläche zwischen Nockenwelle und Ventilstößel sicherzustellen. Hier weist der bekannte Zylinderkopf Nachteile auf, da von den unterhalb den Nockenwellen angeordneten Ölkanälen lange Verbindungen zu den Ventilen und den Nockenwellenlagern vorhanden sind. Diese müssen aufwendig gefertigt werden.Such an internal combustion engine with the features of the preamble of claim 1 enables a favorable arrangement of an ignition device or an injection device in the center of the combustion chamber associated with each piston, in that the gas exchange valves can be arranged around the central ignition device or injection device in the cylinder head area assigned to a combustion chamber. Nevertheless, a reliable supply of lubricating oil and, if necessary, cooling oil to the camshaft bearings, the valves and the sliding surface between the camshaft and valve tappet must be ensured. Here, the known cylinder head has disadvantages, since long connections to the valves and the camshaft bearings are present from the oil channels arranged below the camshafts. These have to be manufactured in a complex manner.

Der Erfindung liegt die Aufgabe zugrunde, einen Zylinderkopf für eine Brennkraftmaschine bereitzustellen, bei dem eine sichere Schmierölversorgung der Nockenwellenlager und der Ventile sichergestellt ist, wobei die entsprechenden Ölkanäle und Verbindungen leicht und kostengünstig zu fertigen sein sollen.The invention has for its object to provide a cylinder head for an internal combustion engine, in which a secure supply of lubricating oil to the camshaft bearings and the valves is ensured, the corresponding oil channels and connections should be easy and inexpensive to manufacture.

Diese Aufgabe wird dadurch gelöst, daß die parallel zu den Nockenwellen verlaufenden Ölkanäle innerhalb des von den Zylinderkopfschrauben gebildeten Bohrbildes neben den Ventilen angeordnet sind. Dadurch werden die Verbindungen zu den Ventilen und zu den Nockenwellenlagern erheblich kürzer als bei dem bekannten Stand der Technik und sind damit leichter zu fertigen.This object is achieved in that the oil channels running parallel to the camshafts are arranged next to the valves within the drilling pattern formed by the cylinder head screws. As a result, the connections to the valves and to the camshaft bearings are considerably shorter than in the known prior art and are therefore easier to manufacture.

Werden die Verbindungen in vorteilhafter Weiterbildung der Erfindung als Kanäle oder Ausnehmungen ausgebildet, die beim Gießen des Zylinderkopfes durch Gießkerne gebildet werden, wirken sich die kurzen Verbindungen positiv auf den Herstellungsvorgang aus. Dadurch, daß die Verbindungen kurz sind, ist die Gefahr des Brechens von entsprechend ausgebildeten Gießkernen gering beziehungsweise nicht mehr vorhanden.If, in an advantageous development of the invention, the connections are designed as channels or recesses which are formed by casting cores when the cylinder head is cast, the short connections have a positive effect on the production process. Because the connections are short, the risk of breaking appropriately designed casting cores is low or no longer exists.

In vorteilhafter Weiterbildung der Erfindung sind die Gießkerne der Ölkanäle und der von jedem Ölkanal abzweigenden Kanäle und/oder Ausnehmungen einstückig ausgebildet. Diese einstückige Ausbildung ermöglicht ein besonders rationelles Herstellungsverfahren, da nur noch für jeden Ölkanal ein Gießkern in der Form vorzugsweise an den Enden des Zylinderkopfes festgelegt werden muß.In an advantageous development of the invention, the casting cores of the oil channels and the channels and / or recesses branching off each oil channel are formed in one piece. This one-piece design enables a particularly efficient manufacturing process, since only one casting core has to be fixed in the mold for each oil channel, preferably at the ends of the cylinder head.

Vorteilhaft sind die Ölkanäle über Querkanäle miteinander verbunden. In diesem Fall können in weiterer Ausgestaltung die Gießkerne der beiden Ölkanäle des Zylinderkopfes und die diese verbindenden Querkanäle einstückig ausgebildet sein. Damit braucht für jeden Zylinderkopf nur noch ein einziger Kern für die gesamte Ölversorgung des Zylinderkopfs in der Gießform festgelegt werden. Damit ist aber auch die Gefahr des Abbrechens von Kernteilen minimiert, so daß die Ausschußquote von nicht brauchbaren Zylinderköpfen weiter reduziert ist.The oil channels are advantageously connected to one another via transverse channels. In this case, in a further embodiment, the casting cores of the two oil passages of the cylinder head and the transverse passages connecting them can be formed in one piece. This means that only one core needs to be defined for each cylinder head for the entire oil supply to the cylinder head in the casting mold. However, this also minimizes the risk of core parts breaking off, so that the reject rate of unusable cylinder heads is further reduced.

In weiterer Ausgestaltung sind an die Querkanäle Abzweigkanäle zu den Nockenwellenlagern angeschlossen. Diese Lösung bietet sich besonders an, wenn im Bereich zwischen allen benachbarten Zylindern Querkanäle vorgesehen werden. In diesem Fall können die Kerne zu den Nockenwellenlagern als einfache kurze Abzweigkanäle von diesen Querkanälen aus gebildet werden. Dabei sind auch die Gießkerne der Querkanäle vorzugsweise einstückig mit den Gießkernen der Abzweigkanäle ausgebildet.In a further embodiment, branch channels to the camshaft bearings are connected to the transverse channels. This solution is particularly useful if cross-channels are provided in the area between all adjacent cylinders. In this case, the cores to the camshaft bearings can be formed as simple short branch channels from these transverse channels. The casting cores of the transverse channels are preferably formed in one piece with the casting cores of the branch channels.

An die Gießkerne der Kanäle oder Ausnehmungen zu den Ventilstößeln sind in weiterer Ausgestaltung Lagerkerne angeformt, die nach der Kernmontage zwischen Ventilfederkernunterteil und Ventilfederkernoberteil arretiert sind. Dadurch wird eine weitere Stabilisierung des ganzen Kerns erreicht, und die Gefahr von Beschädigungen des Kerns weiter verringert. Auch ist dadurch die Gefahr des "Verbiegens" des Gießkerns insbesondere im Bereich der Ölkanäle ausgeschlossen. Im übrigen sind die Gaswechselventile bevorzugt senkrecht, das heißt achsparallel in dem Zylinderkopf angeordnet. Dies hat den Vorteil eines unkomplizierten Gießkernes und einer einfachen Bearbeitbarkeit beispielsweise der Ventilsitze beziehungsweise Ventilsitzringe.In a further embodiment, bearing cores are molded onto the casting cores of the channels or recesses to the valve tappets, which are locked between the valve spring core lower part and valve spring core upper part after the core assembly. This further stabilizes the entire core and further reduces the risk of damage to the core. This also eliminates the risk of the casting core "bending", particularly in the area of the oil channels. In addition, the gas exchange valves are preferably arranged vertically, that is to say axially parallel in the cylinder head. This has the advantage of an uncomplicated casting core and simple workability, for example of the valve seats or valve seat rings.

Weitere Ausgestaltungen der Erfindung sind der Zeichnungsbeschreibung zu entnehmen, in der in den Figuren dargestellte Ausführungsbeispiele der Erfindung beschrieben sind.Further refinements of the invention can be found in the description of the drawings, in which exemplary embodiments of the invention shown in the figures are described.

Es zeigen:

Fig.1:
einen Längsschnitt V durch einen Zylinderkopf,
Fig.2:
einen Längsschnitt I durch den Zylinderkopf,
Fig.3:
einen Querschnitt II durch den Zylinderkopf,
Fig.4:
einen Querschnitt III durch den Zylinderkopf,
Fig.5:
einen Querschnitt IV durch den Zylinderkopf,
Fig.6:
einen Querschnitt durch den Zylinderkopf ähnlich Fig.3 mit einem anders ausgebildeten Ölkanal und
Fig.7:
eine Variante zu Fig.5.
Show it:
Fig.1:
a longitudinal section V through a cylinder head,
Fig. 2:
a longitudinal section I through the cylinder head,
Fig. 3:
a cross section II through the cylinder head,
Fig. 4:
a cross section III through the cylinder head,
Fig. 5:
a cross section IV through the cylinder head,
Fig. 6:
a cross section through the cylinder head similar to Figure 3 with a differently designed oil channel and
Fig. 7:
a variant to Fig. 5.

Der Zylinderkopf nach Fig.1 weist je Zylinder vier Gaswechselventile auf, die in Ausnehmungen 1a, 1b, 1c, 1d für jeden Zylinder angeordnet sind. Dabei weisen die Ausnehmungen 1a, 1b, 1c, 1d in Fig.1 einen Durchmesser auf, der zur Aufnahme von Hydrostößeln zum Ventilspielausgleich ausgelegt ist. Die Ausnehmungen 1a, 1b, 1c, 1d beziehungsweise die entsprechenden Gaswechselventile und Hydrostößel sind so zu dem Brennraum eines Zylinders angeordnet, daß mittig zu dem Brennraum eine Öffnung 2 angeordnet werden kann. In die Öffnung 2 ist eine Zündeinrichtung, eine Vorkammer oder eine Einspritzdüse einsetzbar. Der Zylinderkopf wird mit Zylinderkopfschrauben an dem Kurbelgehäuse der Brennkraftmaschine befestigt, wobei die Zylinderkopfschrauben durch Zylinderkopfschraubenpfeifen 3 hindurchgeführt werden. Zwischen den Zylinderkopfschraubenpfeifen 3 erstrecken sich Verbindungswände 4. In dem von den Zylinderkopfschraubenpfeifen 3 und den Verbindungswänden 4 gebildeten Innenraum erstrecken sich parallel zu den Achsen der Nockenwellen 5a, 5b (Fig.3) Ölkanäle 6a, 6b. Das Öl gelangt über Ein- und Austritte 7a, 7b oder alternativ 7c, in diesem Fall wird 7b verschlossen und Querkanäle 8a, 8b in die Ölkanäle 6a, 6b. Zwischen den einzelnen Zylindereinheiten des dargestellten Vierzylinderkopfes sind weitere Querkanäle 8c, 8d, 8e vorgesehen. Beim Gießvorgang des Zylinderkopfes sind sämtliche Kanäle, durch die Öl strömt, durch einen einzigen Gießkern gebildet. Gehalten wird der Gießkern durch Aufnahmen, die durch den Ein- und Austritt, 7a, 7b ragen, sowie durch Lagerkerne, die in die Ausnehmungen 1a, 1b, 1c, 1d für die Ventile ragen und zwischen Ventilfederkernunterteil und Ventilfederkernoberteil arretiert werden.The cylinder head according to FIG. 1 has four gas exchange valves per cylinder, which are arranged in recesses 1a, 1b, 1c, 1d for each cylinder. The recesses 1a, 1b, 1c, 1d in FIG. 1 have a diameter which is designed to accommodate hydraulic tappets for valve clearance compensation. The recesses 1a, 1b, 1c, 1d or the corresponding gas exchange valves and hydraulic tappets are arranged in relation to the combustion chamber of a cylinder in such a way that an opening 2 can be arranged in the center of the combustion chamber. An ignition device, a prechamber or an injection nozzle can be inserted into the opening 2. The cylinder head is fastened to the crankcase of the internal combustion engine with cylinder head screws, the cylinder head screws being passed through cylinder head screw pipes 3. Connecting walls 4 extend between the cylinder head screw pipes 3. In the interior space formed by the cylinder head screw pipes 3 and the connecting walls 4, oil channels 6a, 6b extend parallel to the axes of the camshafts 5a, 5b (FIG. 3). The oil passes through inlets and outlets 7a, 7b or alternatively 7c, in this case 7b is closed and transverse channels 8a, 8b into the oil channels 6a, 6b. Between the individual cylinder units In the four-cylinder head shown, further transverse channels 8c, 8d, 8e are provided. During the casting process of the cylinder head, all channels through which oil flows are formed by a single casting core. The casting core is held by receptacles that protrude through the inlet and outlet, 7a, 7b, and by bearing cores that protrude into the recesses 1a, 1b, 1c, 1d for the valves and are locked between the valve spring lower part and the valve spring upper part.

In dem Schnitt nach Fig.2 ist der Ölkanal 6b strichliniert dargestellt.In the section according to FIG. 2, the oil channel 6b is shown in broken lines.

In Fig.3 ist ein Schnitt durch einen montierten Zylinderkopf dargestellt. Der Zylinderkopf mit den Ölkanälen 6a, 6b ist von einer Zylinderkopfhaube 9 abgedeckt. In dem abgedeckten Raum sind zwei Nockenwellen 5a, 5b montiert, die mit ihren Nocken 10a, 10b Hydrostößel 11a, 11b betätigen. Die Hydrostößel 11a, 11b wirken wiederrum auf Ventilschäfte 12a, 12b, die mit nicht dargestellten Ventiltellern zur Steuerung des Gaswechsels der Brennkraftmaschine verbunden sind.3 shows a section through an assembled cylinder head. The cylinder head with the oil channels 6a, 6b is covered by a cylinder head cover 9. Two camshafts 5a, 5b are mounted in the covered space, which actuate hydraulic tappets 11a, 11b with their cams 10a, 10b. The hydraulic tappets 11a, 11b in turn act on valve stems 12a, 12b, which are connected to valve disks, not shown, for controlling the gas exchange of the internal combustion engine.

Von den Ölkanälen 6a, 6b zweigen Kanäle 13a, 13b zu den Ausnehmungen 1a, 1b, 1c, 1d ab, in denen die Hydrostößel 11a, 11b sowie die Ventilschäfte 12a, 12b mit den Ventilfedern angeordnet sind.Channels 13a, 13b branch off from the oil channels 6a, 6b to the recesses 1a, 1b, 1c, 1d, in which the hydraulic tappets 11a, 11b and the valve stems 12a, 12b with the valve springs are arranged.

Strichliniert ist ein Querkanal 8c mit Abzweigkanälen 14c', 14c'' zu den Nockenwellenlagern dargestellt.A cross-channel 8c with branch channels 14c ', 14c' 'to the camshaft bearings is shown in broken lines.

Fig.4 zeigt einen Schnitt III durch einen unmontierten Zylinderkopf im Bereich von Zylinderkopfschraubenpfeifen 3, während Fig.5 einen Schnitt IV durch den Zylinderkopf im Bereich des Querkanals 8d darstellt. Von dem Querkanal 8d zweigen Abzweigkanäle 14d' und 14d'' zu den Nockenwellenlagern ab.4 shows a section III through an unmounted cylinder head in the area of cylinder head screw pipes 3, while FIG. 5 shows a section IV through the cylinder head in Area of the transverse channel 8d. Branch channels 14d 'and 14d''branch off from the transverse channel 8d to the camshaft bearings.

Die Fig.6 und 7 zeigen Schnitte durch ein anderes Ausführungsbeispiel eines Zylinderkopfes mit Ölkanälen 6a', 6b'. Von den Ölkanälen 6a', 6b' zweigen wiederrum Kanäle 13a, 13b zu den Ausnehmungen 1a, 1b, 1c, 1d jedes Zylinders ab. Die Nockenwellenlager sind über mit den Ölkanälen 6a', 6b' verbundenen Ausnehmungen 15a, 15b verbunden. Querkanäle sind bei dieser Ausführungsform nicht vorgesehen.6 and 7 show sections through another embodiment of a cylinder head with oil channels 6a ', 6b'. In turn, channels 13a, 13b branch off from the oil channels 6a ', 6b' to the recesses 1a, 1b, 1c, 1d of each cylinder. The camshaft bearings are connected via recesses 15a, 15b connected to the oil channels 6a ', 6b'. Cross channels are not provided in this embodiment.

Claims (8)

Zylinderkopf für eine Brennkraftmaschine, die ein Kurbelgehäuse und eine darin drehbar gelagerte Kurbelwelle aufweist, an der zumindest ein mit einem Kolben verbundenes Pleuel befestigt ist, wobei der Kolben in einem Zylinder bewegbar ist, der von dem für mehrere Zylinder gefertigten Zylinderkopf abgedeckt ist, wobei in dem Zylinderkopf zwei Nockenwellen angeordnet sind, die je Zylinder Gaswechselventile, insbesondere zwei Einlaßventile und zwei Auslaßventile steuern und wobei unterhalb der Nockenwellen je ein zu diesen paralleler Ölkanal angeordnet ist, der Verbindungen zu den Ventilen und den Nockenwellenlagern aufweist,
dadurch gekennzeichnet, daß die Ölkanäle (6a, 6b, 6a', 6b'), innerhalb des von den Zylinderkopfschrauben gebildeten Bohrbildes neben den Ventilen angeordnet sind.Cylinder head for an internal combustion engine, which has a crankcase and a crankshaft rotatably mounted therein, to which at least one connecting rod connected to a piston is fastened, the piston being movable in a cylinder which is covered by the cylinder head manufactured for several cylinders, wherein in arranged in the cylinder head are two camshafts which control gas exchange valves, in particular two intake valves and two exhaust valves, and an oil channel parallel to these is arranged below the camshafts and has connections to the valves and the camshaft bearings,
characterized in that the oil channels (6a, 6b, 6a ', 6b') are arranged next to the valves within the drilling pattern formed by the cylinder head screws. Zylinderkopf nach Anspruch 1,
dadurch gekennzeichnet, daß die Verbindungen als Kanäle (13a, 13b) und/oder Ausnehmungen (15a, 15b) gebildet sind, die beim Gießen des Zylinderkopfes durch Gußkerne gebildet werden.Cylinder head according to claim 1,
characterized in that the connections are formed as channels (13a, 13b) and / or recesses (15a, 15b) which are formed by casting cores when the cylinder head is cast. Zylinderkopf nach Anspruch 2,
dadurch gekennzeichnet, daß die Gießkerne der Ölkanäle (6a, 6b, 6a', 6b') und die von jedem Ölkanal (6a, 6b, 6a', 6b') abzweigenden Kanäle (13a, 13b) und/oder Ausnehmungen (15a, 15b) einstückig ausgebildet sind.Cylinder head according to claim 2,
characterized in that the casting cores of the oil channels (6a, 6b, 6a ', 6b') and the channels (13a, 13b) and / or recesses (15a, 15b.) branching off each oil channel (6a, 6b, 6a ', 6b') ) are integrally formed. Zylinderkopf nach einem der vorherigen Ansprüche,
dadurch gekennzeichnet, daß die Ölkanäle (6a, 6b, 6a', 6b') über Querkanäle (8a, 8b, 8c, 8d, 8e) miteinander verbunden sind.Cylinder head according to one of the preceding claims,
characterized in that the oil channels (6a, 6b, 6a ', 6b') are connected to one another via transverse channels (8a, 8b, 8c, 8d, 8e). Zylinderkopf nach Anspruch 4,
dadurch gekennzeichnet, daß die Gießkerne der Ölkanäle (6a, 6b, 6a', 6b') und der Querkanäle (8a, 8b, 8c, 8d, 8e) einstückig ausgebildet sind.Cylinder head according to claim 4,
characterized in that the casting cores of the oil channels (6a, 6b, 6a ', 6b') and the transverse channels (8a, 8b, 8c, 8d, 8e) are formed in one piece. Zylinderkopf nach Anspruch 4 oder Anspruch 5,
dadurch gekennzeichnet, daß an die Querkanäle (8a, 8b, 8c, 8d, 8e) Abzweigkanäle (14c', 14c'') zu den Nockenwellenlagern angeschlossen sind.Cylinder head according to claim 4 or claim 5,
characterized in that branch channels (14c ', 14c'') to the camshaft bearings are connected to the transverse channels (8a, 8b, 8c, 8d, 8e). Zylinderkopf nach Anspruch 6,
dadurch gekennnzeichnet, daß die Gießkerne der Querkanäle (8a, 8b, 8c, 8d, 8e) und der Abzweigkanäle (14c, 14c'') einstückig ausgebildet sind.Cylinder head according to claim 6,
characterized in that the casting cores of the transverse channels (8a, 8b, 8c, 8d, 8e) and the branch channels (14c, 14c '') are formed in one piece. Zylinderkopf nach einem der Ansprüche 2 bis 7,
dadurch gekennzeichnet, daß an die Gießkerne der Kanäle (13a, 13b) und/oder Ausnehmungen (15a, 15b) zu den Ventilen Lagerkerne angeformt sind, wobei die Lagerkerne nach der Kernmontage zwischen Ventilfederkernunterteil und Ventilfederkernoberteil arretiert sind.Cylinder head according to one of claims 2 to 7,
characterized in that bearing cores are formed on the casting cores of the channels (13a, 13b) and / or recesses (15a, 15b) to the valves, the bearing cores being locked between the valve spring core lower part and the valve spring core upper part after the core assembly.
EP92108224A 1991-05-25 1992-05-15 Cylinder head for combustion engine Expired - Lifetime EP0515925B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4117162A DE4117162A1 (en) 1991-05-25 1991-05-25 CYLINDER HEAD FOR AN INTERNAL COMBUSTION ENGINE
DE4117162 1991-05-25

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EP0515925A1 true EP0515925A1 (en) 1992-12-02
EP0515925B1 EP0515925B1 (en) 1996-01-31

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US8439008B2 (en) 2005-06-22 2013-05-14 GM Global Technology Operations LLC Internal combustion engine comprising an integrated oil dipstick guiding element

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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
DE19729947A1 (en) 1997-07-12 1999-01-14 Deutz Ag Four-valve block cylinder head with diagonally arranged gas exchange valves
JP2004116356A (en) * 2002-09-25 2004-04-15 Isuzu Motors Ltd Oil gallery forming method for cylinder head, and cylinder head
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Also Published As

Publication number Publication date
DE4117162A1 (en) 1992-11-26
JPH05180067A (en) 1993-07-20
EP0515925B1 (en) 1996-01-31
DE59205210D1 (en) 1996-03-14

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