EP0627547B1 - Cylinder head for an internal combustion engine with controlled valve motion - Google Patents
Cylinder head for an internal combustion engine with controlled valve motion Download PDFInfo
- Publication number
- EP0627547B1 EP0627547B1 EP94108022A EP94108022A EP0627547B1 EP 0627547 B1 EP0627547 B1 EP 0627547B1 EP 94108022 A EP94108022 A EP 94108022A EP 94108022 A EP94108022 A EP 94108022A EP 0627547 B1 EP0627547 B1 EP 0627547B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cylinder head
- insert
- valve
- gas exchange
- opening
- 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
- 238000002485 combustion reaction Methods 0.000 title claims description 11
- 230000002093 peripheral effect Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000007789 sealing Methods 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
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- 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
- F01L3/08—Valves guides; Sealing of valve stem, e.g. sealing by lubricant
- F01L3/085—Valve cages
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- 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
- F02F1/26—Cylinder heads having cooling means
- F02F1/36—Cylinder heads having cooling means for liquid cooling
- F02F1/38—Cylinder heads having cooling means for liquid cooling the cylinder heads being of overhead valve type
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- 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]
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- 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
- F02F2001/241—Cylinder heads specially adapted to pent roof shape of the combustion chamber
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/24—Cylinder heads
- F02F2001/244—Arrangement of valve stems in cylinder heads
- F02F2001/245—Arrangement of valve stems in cylinder heads the valve stems being orientated at an angle with the cylinder axis
Definitions
- the invention relates to a cylinder head for a valve-controlled internal combustion engine according to the preamble of claim 1.
- Such a cylinder head is described with FR 745 862.
- the insert is inserted from above into the fuselage of the cylinder head and braced with a cover against a circumferential step near the combustion chamber.
- the valve spring must therefore be placed over the cover.
- the fitting and tensioning of a cover in the area of the valve train requires considerable installation space and complicates the assembly of the cylinder head.
- DE-OS 33 27 948 is another cylinder head with one described channel-forming use.
- a wedge-shaped compression chamber is formed in that the valve plates form an essential part of the side surfaces of this compression chamber. Since this means that the valves can no longer be used from the compression chamber, at least one opening is provided in the cylinder head, which leads from the outside through the side wall of the compression chamber.
- a sealed housing is inserted from the outside into the opening, in which a controllable valve is guided and in which the inlet and outlet channels are incorporated.
- the object of the present invention is to provide a cylinder head for a valve-controlled internal combustion engine, in which at least the mouth areas of the gas exchange channels can be produced outside the cylinder head and inserted into the cylinder head, but the fuselage of the cylinder head can remain a unit, so that the coolant channels and the Oil channels run in the usual way within a block.
- the invention sets itself the task of making such a cylinder head easier and cheaper to manufacture.
- Such an insert forms a valve guide above the region of the gas exchange duct close to the mouth and carries the valve springs with its upper end face, the insert being supported on a circumferential step of the bore in the fuselage of the cylinder head.
- the invention thus makes it possible to pre-assemble the insert and thus the precisely machined opening area of the gas exchange channel together with the associated gas exchange valve and its valve springs including the valve stem guide and valve stem seal outside the cylinder head to form a valve module.
- This valve module can be prepared in a specialized production, so that it can then be mounted with great efficiency when assembling the cylinder head with the fuselage of the cylinder head.
- a valve seat ring known per se can be arranged between the sealing surfaces of the plate of the gas exchange valve and the insert and held in the fuselage of the cylinder head.
- valve seat ring Due to the arrangement of a valve seat ring known per se, which is included in a pre-assembled valve module between the valve and the insert in the module, a stable sealing behavior of the valves can be achieved even with difficult engine operation. By selecting suitable materials for the application, however, a special valve seat ring can also be dispensed with.
- the regions near the mouth of a plurality of gas exchange channels located in a row are arranged in a common insert.
- these can also Gas exchange valves controlling gas exchange channels can be guided in the insert.
- Such an insert can also be preassembled with the gas exchange valves as a module, in which case the central axes of the valves can then be arranged independently of the central axis of the insert.
- both intake valves surrounded by an insert.
- These two inlet valves can be arranged parallel to one another, but they can also form an angle with one another.
- the drawing shows a cylinder head according to the invention in section.
- the fuselage 1 of the cylinder head is cut in the area of two gas exchange channels 2 and 3.
- the gas exchange channel 2 is formed in the usual way over the entire length of the fuselage 1, that is to say it is subject to the usual casting tolerances.
- the gas exchange duct 3, on the other hand, is formed only in its upper straight region 4 by the casting of the fuselage 1, while the lower region 5 near the mouth runs in an insert 6, which is provided as a cylindrical part in a cylindrical part in the fuselage 1 of the cylinder head, coaxial to the longitudinal axis of a the gas exchange channel 3 controlling gas exchange valve 7 extending bore is arranged.
- valve stem guide 12 is formed by the insert 6, on which a valve stem seal (not shown) can be mounted, which forms a seal with respect to the oil space 15.
- the insert 6 extends with its upper end face 18 to the oil space 15 of the cylinder head, while an upper edge 13 is supported on a step 19 of the bore for receiving the insert 6.
- the valve spring 20 can be supported directly on the insert 6 and the insert 6 can be pressed together with the gas exchange valve 7, the valve spring 20, the spring plate 21 with the spring plate keys 22 and a valve stem seal, not shown, pre-assembled into the bore in the fuselage 1 of the cylinder head . It is thus possible to provide a preassembled valve module together with the region 5 of a gas exchange duct 3 close to the mouth, which further reduces the manufacturing outlay when assembling the cylinder head compared to the previously described embodiments.
- a separate valve seat ring can of course also be provided, which is then inserted between the gas exchange valve 7 and the insert 6 during the pre-assembly.
- the valve seat can also be formed by the insert 6.
- An insert 6 according to the invention will be used in particular with inlet ducts; but it is also applicable to exhaust ports, so that a cylinder head according to the invention can be implemented with an insert 6 on one or more intake ports, on one or more exhaust ports, or on both intake and exhaust ports.
- a large number of further exemplary embodiments are conceivable for the invention, for example by B.
- two orifices of separate inlet channels of a cylinder in a prismatic insert are arranged, in which the associated two gas exchange valves with their valve springs can then also be preassembled.
- the invention creates the prerequisites for producing a cylinder head with relatively simple means so that the charge interaction efficiency as a factor of the overall efficiency of an internal combustion engine achieves a good value even in the difficult transition between the straight passage section and valve seat due to the high fluidic quality of the charge exchange ducts.
- primary molding processes can be used for the production of the entire channel course.
- H. Production can be carried out at low cost, since no manual mechanical reworking in the course of the channel is required.
- the insert 6 can be produced as a sintered part, it being possible to use a gradient material in a manner known per se, with which high hardness can be achieved in the area of the valve seat and good bearing properties in the area of the valve guide.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Lift Valve (AREA)
Description
Die Erfindung betrifft einen Zylinderkopf für eine ventilgesteuerte Brennkraftmaschine nach dem Oberbegriff des Patentanspruches 1.The invention relates to a cylinder head for a valve-controlled internal combustion engine according to the preamble of claim 1.
Ein derartiger Zylinderkopf ist mit FR 745 862 beschrieben. Bei diesem bekannten Zylinderkopf ist der Einsatz von oben her in den Rumpf des Zylinderkopfes eingesetzt und mit einem Deckel gegen eine umlaufende Stufe nahe des Brennraumes verspannt. Die Ventilfeder muß somit über den Deckel aufgesetzt werden. Das Aufsetzen und Verspannen eines Deckels im Bereich des Ventiltriebes erfordert erheblichen Bauraum und erschwert die Montage des Zylinderkopfes.Such a cylinder head is described with FR 745 862. In this known cylinder head, the insert is inserted from above into the fuselage of the cylinder head and braced with a cover against a circumferential step near the combustion chamber. The valve spring must therefore be placed over the cover. The fitting and tensioning of a cover in the area of the valve train requires considerable installation space and complicates the assembly of the cylinder head.
Mit EP 0 629 772 (Stand der Technik gemäß Art. 54(3) EPÜ) wurde bereits vorgeschlagen, einen Zylinderkopf mit einem durch einen Einsatz gebildeten Gaswechselkanal zu versehen, wobei der drehbar gelagerte Einsatz von unten, also vom Verbrennungsraum her, gegen eine umlaufende Stufe der aufnehmenden Bohrung im Rumpf des Zylinderkopfes anliegt. Dadurch kann die Montage des Einsatzes von der dem Ventiltrieb abgelegenen Seite erfolgen. Die Raumverhältnisse im Bereich des Ventiltriebes werden nicht beeinträchtigt. Die Montage des Einsatzes wird vereinfacht. Die Montage der Ventile mit ihren Federn und die des Ventiltriebes wird durch diesen Einsatz nicht vorteilhaft verändert.With EP 0 629 772 (prior art according to Art. 54 (3) EPC) it has already been proposed to provide a cylinder head with a gas exchange duct formed by an insert, the rotatably mounted insert from below, ie from the combustion chamber, against a rotating one Level of the receiving bore in the fuselage of the cylinder head. This allows the insert to be assembled from the side remote from the valve train. The spatial conditions in the area of the valve train are not impaired. The assembly of the insert is simplified. The assembly of the valves with their springs and that of the valve train is not advantageously changed by this use.
Mit DE-OS 33 27 948 ist ein weiterer Zylinderkopf mit einem kanalbildenden Einsatz beschrieben. Bei diesem bekannten Zylinderkopf wird eine keilförmige Verdichtungskammer dadurch gebildet, daß die Ventilteller einen wesentlichen Teil der Seitenflächen dieser Verdichtungskammer bilden. Da dadurch die Ventile nicht mehr von der Verdichtungskammer her eingesetzt werden können, ist im Zylinderkopf zumindest eine Öffnung vorgesehen, die von außen durch die Seitenwand der Verdichtungskammer führt. In die Öffnung ist von außen her ein Gehäuse abgedichtet eingesetzt, in dem ein steuerbares Ventil geführt ist und in dem der Ein- bzw. Auslaßkanal eingearbeitet ist.DE-OS 33 27 948 is another cylinder head with one described channel-forming use. In this known cylinder head, a wedge-shaped compression chamber is formed in that the valve plates form an essential part of the side surfaces of this compression chamber. Since this means that the valves can no longer be used from the compression chamber, at least one opening is provided in the cylinder head, which leads from the outside through the side wall of the compression chamber. A sealed housing is inserted from the outside into the opening, in which a controllable valve is guided and in which the inlet and outlet channels are incorporated.
Bei einem solchen Zylinderkopf ergeben sich erhebliche Probleme bei der Führung von Kühlmittelkanälen, da diese die Dichtungsfläche zwischen Zylinderkopf und eingesetztem Gehäuse durchbrechen. Da das Gehäuse von außen her in den Zylinderkopf eingesetzt werden muß, bedarf es auch besonderer Vorkehrungen für die Steuerung des im Gehäuse eingesetzten Ventils, da die Ventilsteuerung zwangsläufig noch oberhalb des Ventilschaftes angeordnet werden muß. Ein Motor mit einem solchen Zylinderkopf ist daher kompliziert im Aufbau und teuer in der Fertigung. Funktionelle Vorteile, die über die angestrebte Keilform des Brennraumes hinausgehen, können damit nicht erzielt werden.With such a cylinder head, there are considerable problems in guiding coolant channels, since these break through the sealing surface between the cylinder head and the housing used. Since the housing must be inserted into the cylinder head from the outside, special precautions are also required for controlling the valve used in the housing, since the valve control must inevitably be arranged above the valve stem. An engine with such a cylinder head is therefore complicated in construction and expensive to manufacture. Functional advantages that go beyond the desired wedge shape of the combustion chamber cannot be achieved with this.
Aufgabe der vorliegenden Erfindung ist es, einen Zylinderkopf für eine ventilgesteuerte Brennkraftmaschine zu schaffen, bei dem zumindest die Mündungsbereiche der Gaswechselkanäle außerhalb des Zylinderkopfes herstellbar und in den Zylinderkopf einsetzbar sind, der Rumpf des Zylinderkopfes aber eine Einheit bleiben kann, so daß die Kühlmittelkanäle sowie die Ölkanäle in üblicher Weise innerhalb eines Blockes verlaufen. Darüber hinaus setzt sich die Erfindung die Aufgabe, einen solchen Zylinderkopf einfacher und billiger herstellbar zu gestalten.The object of the present invention is to provide a cylinder head for a valve-controlled internal combustion engine, in which at least the mouth areas of the gas exchange channels can be produced outside the cylinder head and inserted into the cylinder head, but the fuselage of the cylinder head can remain a unit, so that the coolant channels and the Oil channels run in the usual way within a block. In addition, the invention sets itself the task of making such a cylinder head easier and cheaper to manufacture.
Erfindungsgemäß wird diese Aufgabe durch die kennzeichnenden Merkmale des Patentanspruches 1 gelöst.According to the invention this object is achieved by the characterizing features of claim 1.
Ein solcher Einsatz bildet oberhalb des in ihm verlaufenden mündungsnahen Bereichs des Gaswechselkanals eine Ventilführung und trägt mit seiner oberen Stirnseite die Ventilfedern, wobei sich der Einsatz an einer umlaufenden Stufe der Bohrung im Rumpf des Zylinderkopfes abstützt.Such an insert forms a valve guide above the region of the gas exchange duct close to the mouth and carries the valve springs with its upper end face, the insert being supported on a circumferential step of the bore in the fuselage of the cylinder head.
Die Erfindung ermöglicht es somit, den Einsatz und damit den genau bearbeiteten Mündungsbereich des Gaswechselkanals zusammen mit dem zugehörigen Gaswechselventil und dessen Ventilfedern einschließlich der Ventilschaftführung und Ventilschaftabdichtung außerhalb des Zylinderkopfes zu einem Ventilmodul vorzumontieren. Dieser Ventilmodul kann in einer spezialisierten Fertigung vorbereitet werden, um dann bei der Montage des Zylinderkopfes mit dem Rumpf des Zylinderkopfes mit hoher Effektivität montiert werden zu können.The invention thus makes it possible to pre-assemble the insert and thus the precisely machined opening area of the gas exchange channel together with the associated gas exchange valve and its valve springs including the valve stem guide and valve stem seal outside the cylinder head to form a valve module. This valve module can be prepared in a specialized production, so that it can then be mounted with great efficiency when assembling the cylinder head with the fuselage of the cylinder head.
Zwischen den Dichtflächen des Tellers des Gaswechselventils sowie dem Einsatz kann ein an sich bekannter Ventilsitzring angeordnet und im Rumpf des Zylinderkopfes gehalten sein.A valve seat ring known per se can be arranged between the sealing surfaces of the plate of the gas exchange valve and the insert and held in the fuselage of the cylinder head.
Durch die Anordnung eines an sich bekannten Ventilsitzringes, der bei einem vormontierten Ventilmodul zwischen Ventil und Einsatz im Modul mit einbezogen ist, kann auch bei schwierigem Motorbetrieb ein standfestes Dichtverhalten der Ventile erreicht werden. Durch Auswahl geeigneter Werkstoffe für den Einsatz kann jedoch auch auf einen besonderen Ventilsitzring verzichtet werden.Due to the arrangement of a valve seat ring known per se, which is included in a pre-assembled valve module between the valve and the insert in the module, a stable sealing behavior of the valves can be achieved even with difficult engine operation. By selecting suitable materials for the application, however, a special valve seat ring can also be dispensed with.
Nach einer weiteren Ausführungsform der Erfindung sind die mündungsnahen Bereiche mehrerer in einer Reihe befindlicher Gaswechselkanäle in einem gemeinsamen Einsatz angeordnet. In einem solchen Fall können auch die diese Gaswechselkanäle steuernden Gaswechselventile in dem Einsatz geführt sein. Ein solcher Einsatz kann auch mit den Gaswechselventilen als Modul vormontiert sein, wobei dann die Mittelachsen der Ventile unabhängig von der Mittelachse des Einsatzes angeordnet sein können.According to a further embodiment of the invention, the regions near the mouth of a plurality of gas exchange channels located in a row are arranged in a common insert. In such a case, these can also Gas exchange valves controlling gas exchange channels can be guided in the insert. Such an insert can also be preassembled with the gas exchange valves as a module, in which case the central axes of the valves can then be arranged independently of the central axis of the insert.
Bei einem solchen Zylinderkopf können z. B. bei Anordnung von zwei Einlaßventilen pro Zylinder beide Einlaßventile von einem Einsatz umgeben sein. Diese beiden Einlaßventile können parallel zueinander angeordnet sein, sie können aber auch einen Winkel miteinander einschließen. Es ist auch möglich, bei einer solchen Ausführungsart der Erfindung den Einsatz mit den in ihm verlaufenden mündungsnahen Bereichen mehrerer Gaswechselkanäle und den dazugehörigen Gaswechselventilen einschließlich der zugehörigen Ventilfedern als Modul außerhalb des Zylinderkopfes vorzumontieren und dann als Ganzes in den Rumpf des Zylinderkopfes einzusetzen.In such a cylinder head z. B. with the arrangement of two intake valves per cylinder, both intake valves surrounded by an insert. These two inlet valves can be arranged parallel to one another, but they can also form an angle with one another. In such an embodiment of the invention it is also possible to pre-assemble the insert with the areas of several gas exchange channels and the associated gas exchange valves including the associated valve springs running inside it as a module outside the cylinder head and then to insert them as a whole into the fuselage of the cylinder head.
Ein Ausführungsbeispiel der Erfindung ist nachstehend anhand einer Zeichnung näher beschrieben.An embodiment of the invention is described below with reference to a drawing.
Die Zeichnung zeigt einen erfindungsgemäßen Zylinderkopf im Schnitt. Der Rumpf 1 des Zylinderkopfes ist im Bereich zweier Gaswechselkanäle 2 und 3 geschnitten. Der Gaswechselkanal 2 ist in üblicher Weise über die gesamte Länge vom Rumpf 1 gebildet, also mit den üblichen gußtechnischen Toleranzen behaftet. Der Gaswechselkanal 3 dagegen ist nur in seinem oberen gerade verlaufenden Bereich 4 vom Gußteil des Rumpfes 1 gebildet, während der untere mündungsnahe Bereich 5 in einem Einsatz 6 verläuft, welcher als zylindrisches Teil in einer zylindrischen im Rumpf 1 des Zylinderkopfes vorgesehenen, koaxial zur Längsachse eines den Gaswechselkanal 3 steuernden Gaswechselventils 7 verlaufenden Bohrung angeordnet ist. Dabei tritt der Gaswechselkanal 3 seitlich in den Einsatz 6 ein und an der zum Brennraum 8 der Brennkraftmaschine gerichteten Stirnseite 9 des Einsatzes 6 wieder aus. Durch den Einsatz 6 ist eine Ventilschaftführung 12 gebildet, an dem eine nicht dargestellte Ventilschaftabdichtung montiert werden kann, die eine Abdichtung gegenüber dem Ölraum 15 bildet.The drawing shows a cylinder head according to the invention in section. The fuselage 1 of the cylinder head is cut in the area of two
Der Einsatz 6 ragt mit seiner oberen Stirnseite 18 bis zum Ölraum 15 des Zylinderkopfes, während sich eine obere Kante 13 an einer Stufe 19 der Bohrung zur Aufnahme des Einsatzes 6 abstützt. Damit kann sich die Ventilfeder 20 unmittelbar auf dem Einsatz 6 abstützen und der Einsatz 6 kann zusammen mit dem Gaswechselventil 7, der Ventilfeder 20, dem Federteller 21 mit den Federtellerkeilen 22 sowie einer nicht dargestellten Ventilschaftabdichtung vormontiert in die Bohrung im Rumpf 1 des Zylinderkopfes eingepreßt werden. Es ist so möglich, zusammen mit dem mündungsnahen Bereich 5 eines Gaswechselkanals 3 einen vormontierten Ventilmodul bereitzustellen, welcher den Fertigungsaufwand bei der Montage des Zylinderkopfes gegenüber den vorher beschriebenen Ausführungen weiter reduziert. Bei einem solchen Ventilmodul kann selbstverständlich auch ein separater Ventilsitzring vorgesehen sein, der dann bei der Vormontage zwischen Gaswechselventil 7 und Einsatz 6 eingelegt wird. Der Ventilsitz kann jedoch auch vom Einsatz 6 gebildet sein.The
Ein Einsatz 6 nach der Erfindung wird insbesondere bei Einlaßkanälen angewendet werden; er ist aber ebenso bei Auslaßkanälen anwendbar, so daß ein Zylinderkopf nach der Erfindung sowohl mit jeweils einem Einsatz 6 an einem oder an mehreren Einlaßkanälen, an einem oder an mehreren Auslaßkanälen oder sowohl an Einlaß- als auch an Auslaßkanälen ausführbar ist.An
Für die Erfindung sind eine Vielzahl weiterer Ausführungsbeispiele denkbar, indem z. B. zwei mündungsnahe Bereiche von getrennten Einlaßkanälen eines Zylinders in einem prismatisch gestalteten Einsatz angeordnet sind, in dem dann auch noch die dazugehörigen beiden Gaswechselventile mit ihren Ventilfedern vormontiert sein können.A large number of further exemplary embodiments are conceivable for the invention, for example by B. two orifices of separate inlet channels of a cylinder in a prismatic insert are arranged, in which the associated two gas exchange valves with their valve springs can then also be preassembled.
Weitere Varianten ergeben sich dadurch, daß der Einsatz kegelförmig ausgeführt ist. Damit kann die Menge des gegenüber dem Rumpfmaterial wertvolleren Materials für den Einsatz reduziert werden.Further variants result from the fact that the insert is conical. This means that the amount of material that is more valuable than the hull material can be reduced for use.
Die Erfindung schafft die Voraussetzungen, einen Zylinderkopf mit relativ einfachen Mitteln so zu fertigen, daß der Ladungswechselwirkungsgrad als Faktor des Gesamtwirkungsgrades einer Brennkraftmaschine durch hohe strömungstechnische Güte der Ladungswechselkanäle auch im schwierigen Übergang zwischen gerade verlaufendem Kanalabschnitt und Ventilsitz einen guten Wert erreicht. Dabei können für die Fertigung des gesamten Kanalverlaufs Urformverfahren eingesetzt werden, d. h. die Fertigung kann mit geringen Kosten erfolgen, da keine manuelle mechanische Nacharbeit im Kanalverlauf erforderlich ist. Der Einsatz 6 kann als Sinterteil hergestellt werden, wobei in an sich bekannter Weise ein Gradientenwerkstoff Verwendung finden kann, mit dem im Bereich des Ventilsitzes hohe Härte und im Bereich der Ventilführung gute Lagereigenschaften realisiert werden können.The invention creates the prerequisites for producing a cylinder head with relatively simple means so that the charge interaction efficiency as a factor of the overall efficiency of an internal combustion engine achieves a good value even in the difficult transition between the straight passage section and valve seat due to the high fluidic quality of the charge exchange ducts. Here, primary molding processes can be used for the production of the entire channel course. H. Production can be carried out at low cost, since no manual mechanical reworking in the course of the channel is required. The
Claims (2)
- Cylinder head for a valve-controlled internal combustion engine, in which at least one of the gas exchange channels (3) in the region near the opening is formed by an insert (6) which is located in the cylinder head and extends with its longitudinal axis in a plane parallel to or in register with the longitudinal axis of the gas exchange valve or valves (7) and which is located in a corresponding bore of the body (1) of the cylinder head, and the region (5) of this gas exchange channel (3) near the opening enters the insert (6) laterally and emerges at its end face (9) directed towards the combustion chamber (8), wherein the head of the gas exchange valve (7) is arranged centrally to this outlet opening, the insert (6) above the region (5) of the gas exchange channel (3) extending in it and near the opening forms a valve guide (12) and is supported on a peripheral step (19) of the bore in the body (1) of the cylinder head, characterised in that the insert (6) with its upper end face (18) directly carries the valve spring (20).
- Cylinder head according to claim 1, characterised in that in an insert extend several regions of gas exchange channels arranged in a row, which regions are near the opening.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4318462A DE4318462A1 (en) | 1993-06-03 | 1993-06-03 | Cylinder head for a valve-controlled internal combustion engine |
| DE4318462 | 1993-06-03 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0627547A1 EP0627547A1 (en) | 1994-12-07 |
| EP0627547B1 true EP0627547B1 (en) | 1997-08-06 |
Family
ID=6489555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP94108022A Expired - Lifetime EP0627547B1 (en) | 1993-06-03 | 1994-05-25 | Cylinder head for an internal combustion engine with controlled valve motion |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0627547B1 (en) |
| DE (2) | DE4318462A1 (en) |
| ES (1) | ES2105418T3 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0744542B1 (en) | 1995-05-22 | 1999-08-11 | Dr.Ing.h.c. F. Porsche Aktiengesellschaft | Cylinder head for liquid cooled multicylinder internal combustion engine |
| FR2761403B1 (en) * | 1997-03-21 | 1999-05-14 | Peugeot | CYLINDER HEAD FOR INTERNAL COMBUSTION ENGINE |
| DE19808051A1 (en) * | 1998-02-26 | 1999-09-02 | Reitz | Cylinder head of IC engine |
| DE10029508B4 (en) * | 2000-06-21 | 2008-11-20 | Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr | Channel unit for the change of charge of piston engines and method for their production |
| US20170058823A1 (en) * | 2015-08-24 | 2017-03-02 | GM Global Technology Operations LLC | Cylinder head with blended inlet valve seat for high tumble inlet port |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0629772A1 (en) * | 1993-03-19 | 1994-12-21 | Adam Opel Ag | Inlet duct system for an internal combustion engine comprising at least two inlet valves per cylinder located in the cylinder head |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR745862A (en) * | 1932-05-11 | 1933-05-17 | Ingersoll Rand Co | Valve body for internal combustion engine |
| GB406815A (en) * | 1932-11-10 | 1934-03-08 | Oliver Danson North | Improvements in connection with valves and valve guides for internal combustion engines |
| GB436559A (en) * | 1933-09-28 | 1935-10-14 | Binem Perlmutter | Improvements in or relating to internal-combustion engines of the liquid-fuel injection type |
| FR70548E (en) * | 1956-09-24 | 1959-05-29 | Lanova Ag | Internal combustion engine, fuel injection with air-cooled or water-cooled cylinder head, with attached combustion chamber |
-
1993
- 1993-06-03 DE DE4318462A patent/DE4318462A1/en not_active Withdrawn
-
1994
- 1994-05-25 DE DE59403608T patent/DE59403608D1/en not_active Expired - Fee Related
- 1994-05-25 EP EP94108022A patent/EP0627547B1/en not_active Expired - Lifetime
- 1994-05-25 ES ES94108022T patent/ES2105418T3/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0629772A1 (en) * | 1993-03-19 | 1994-12-21 | Adam Opel Ag | Inlet duct system for an internal combustion engine comprising at least two inlet valves per cylinder located in the cylinder head |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0627547A1 (en) | 1994-12-07 |
| ES2105418T3 (en) | 1997-10-16 |
| DE4318462A1 (en) | 1994-12-08 |
| DE59403608D1 (en) | 1997-09-11 |
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