EP2349610A1 - Positioning surfaces on a gas exchange channel rake - Google Patents

Positioning surfaces on a gas exchange channel rake

Info

Publication number
EP2349610A1
EP2349610A1 EP09778569A EP09778569A EP2349610A1 EP 2349610 A1 EP2349610 A1 EP 2349610A1 EP 09778569 A EP09778569 A EP 09778569A EP 09778569 A EP09778569 A EP 09778569A EP 2349610 A1 EP2349610 A1 EP 2349610A1
Authority
EP
European Patent Office
Prior art keywords
gas exchange
rake
cylinder head
stops
channel rake
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
EP09778569A
Other languages
German (de)
French (fr)
Other versions
EP2349610B1 (en
Inventor
Lothar Bauer
Werner Lemme
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.)
Deutz AG
Original Assignee
Deutz AG
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Filing date
Publication date
Application filed by Deutz AG filed Critical Deutz AG
Publication of EP2349610A1 publication Critical patent/EP2349610A1/en
Application granted granted Critical
Publication of EP2349610B1 publication Critical patent/EP2349610B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/10—Cores; Manufacture or installation of cores
    • B22C9/103—Multipart cores

Definitions

  • the invention relates to a gas exchange duct rake as part of a casting mold for a cylinder head of an internal combustion engine, wherein the gas exchange duct rake is assembled with other core parts and lower box and upper box to the mold, and wherein the Gascickanal- rake for a Clearancebearbeitung positioning surfaces.
  • Such positioning surfaces on the gas exchange channel rake of a cylinder head of an internal combustion engine are known and used in order to position the cast cylinder head blank more or less defined for the so-called adjustment or initial receiving processing.
  • this processing then, starting from the positioning surfaces, for example, a surface of the cylinder head blank is processed, in which case this surface is the base surface for further processing.
  • the invention has for its object to select the positioning of a Gas monocytes and to order that a reliable and accurate positioning of a positioning device for the Motherboardbearbeitung is achieved.
  • the positioning surfaces are three height stops, two transverse stops and a longitudinal stop.
  • the positioning is removed and, starting from the already processed surfaces and / or holes, the other necessary processing of the cylinder head are made in particular in the area that could not be processed by the initially mounted positioning.
  • This includes, for example, the manufacture of the recesses for receiving the valve seat rings. It is clear that their position relative to the gas exchange channels for the swirl behavior of the cylinder head are particularly important.
  • the height stops in the form of a tripod are arranged distributed on the gas exchange channel rake in the form that two height stops in the region of Ventil Operationss- are arranged by different inlet channel rake teeth and the third height stop is arranged on a cylinder head side wall end of another inlet channel rake tooth.
  • This arrangement of height stops ensures an exact height positioning of the positioning.
  • two of the height stops are arranged in the region of valve guide studs, it is ensured that there is no influence on the flow path of the combustion air through the finished inlet duct in comparison to the further inlet duct rake.
  • the outlet channel rake teeth can also be used for positioning in the manner shown.
  • the two height stops are arranged on outer inlet channel rake teeth, and the third height stop is arranged on a further inlet channel rake tooth arranged between the outer inlet channel rake teeth.
  • the transverse stops are arranged at least on two outer inlet channel rake teeth. This is the best place for the exact alignment of the positioning.
  • a transverse stop may also be present at the other inlet channel rake teeth. This ensures that all of the injection channel rake teeth are of the same design in this important area for the flow pattern of the combustion air.
  • the transverse stops can be arranged in the region next to the valve guide slugs or else be arranged in the region of the cylinder head bottom ends of the inlet channel rake teeth. In particular, in the latter case, transverse stops can be provided on each of the inlet channel rake teeth. This is particularly the case when the transverse stops are not arranged in a casting area, which is machined later in the processing of the valve seat receiving surfaces, so that fluidly uniform channels arise.
  • the longitudinal stop is arranged in the region adjacent to the valve guide or at a cylinder head bottom side end of an intake passage rake tooth.
  • (non-functional) longitudinal stops for ensuring a uniform flow behavior can also be arranged on the other inlet channel rake teeth; in particular if the longitudinal stop (s) are not arranged in a casting area which is later machined during the machining of the valve seat receiving surfaces.
  • Fig. 2 shows a second variant of a Gas monocytes, wherein the transverse stops are arranged as part of the positioning at another location.
  • the gas exchange duct rake 1 which is shown incompletely in the figures, is intended for the casting mold of a four-cylinder two-valve cylinder head. Not shown is the fauxhaltende the individual channel rake Maussteii, which is arranged at the zyiinderkopf receivingwandigen end 6 of the channel rake teeth. At this connection part, both the intake passage rake teeth 2 and the exhaust passage rake teeth 3 are mounted. This connecting part connects the channel rake teeth outside of the (finished) cylinder head.
  • the gas exchange channel rake is positioned defined in the casting mold together with the other core parts.
  • the crude cylinder head must be further processed and, for example, recesses for receiving valve seat rings must be machined precisely fitting with respect to the inlet ducts.
  • a positioning device is used in the gas exchange channels and, starting from defined reference points of the positioning device, quasi an adjustment or Clearancebearbeitung made of certain surfaces and / or holes on the cylinder head. Starting from this Justage- or Clearagebearbeitung then the recesses for the valve seat rings can be made.
  • height stops 4a, 4d are arranged in the region of Ventil Evaluationsbutzen 5 and a third height stop 4b is at one in between lying inlet channel rake tooth 2b attached to the cylinder head sidewall end 6.
  • the height stops 4a, 4b, 4d form a tripod and ensure a secure positioning of the positioning.
  • Transverse stops 7a, 7d are in turn arranged on the outer inlet channel rake teeth 2a, 2d, namely on their cylinder head base side ends.
  • a longitudinal stopper 8 is disposed at the cylinder head side end of the intake passage rake tooth 2c. Both the transverse stops 7a, 7b and the longitudinal stop 8 lie in a region of the finished cylinder head, in which a machining operation is carried out to create receiving recesses for valve seat rings.
  • the transverse stops 7a 7d * (which cooperate with corresponding counterparts) and the longitudinal stop 8 'are arranged in the area adjacent to the guide slugs 5 of the inlet channel rake teeth 2a, 2c and 2d.
  • This area is not flow-influencing for the combustion air. But it can also be on all inlet channel rake teeth 2 both transverse stops 7 ' and longitudinal stops 8 ' may be present when a (small) flow control is to be assumed.
  • Combined arrangements according to FIGS. 1 and 2 can also be realized within the scope of the invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Abstract

The invention relates to a gas exchange channel rake as part of a casing mould for a cylinder head of an internal combustion engine, wherein the gas exchange channel rake is assembled with other core parts and the cope and drag to form the mould, and wherein the gas exchange channel rake comprises positioning surfaces for a first casting machining of the cylinder head. According to the invention, the positioning surfaces of a gas exchange channel rake (1) are selected and arranged such that reliable and exact positioning of a positioning device in the unmachined cylinder head removed from the core is accomplished. This is achieved in that the positioning surfaces have three vertical stops (4), two transversal stops (7) and one longitudinal stop (8) that are arranged in the shape of a tripod. Due to this arrangement, extremely exact positioning of the positioning unit is assured with a minimum number of different positioning surfaces.

Description

POSITIONIERFLACHEN AN EINEM GEWECHSELKANALRECHENKERN POSITIONING FLATS ON A CHANGE CHANNEL BIN
B E S C H R E I B U N GDESCRIPTION
Die Erfindung betrifft einen Gaswechselkanalrechen als Teil einer Gießform für einen Zylinderkopf einer Brennkraftmaschine, wobei der Gaswechselkanalrechen mit anderen Kernteilen sowie Unterkasten und Oberkasten zu der Gießform zusammengesetzt ist, und wobei der Gaswechselkanal- rechen für eine Erstaufnahmebearbeitung Positionierflächen aufweist.The invention relates to a gas exchange duct rake as part of a casting mold for a cylinder head of an internal combustion engine, wherein the gas exchange duct rake is assembled with other core parts and lower box and upper box to the mold, and wherein the Gaswechselkanal- rake for a Erstaufnahmebearbeitung positioning surfaces.
Derartige Positionierflächen an Gaswechselkanalrechen eines Zylinderkopfs einer Brennkraftmaschine sind bekannt und werden benutzt, um den gegossenen Zylinderkopfrohling für die sogenannte Justage- beziehungs- weise Erstaufnahmebearbeitung mehr oder weniger definiert zu positionieren. Bei dieser Bearbeitung wird dann, ausgehend von den Positionierflächen, beispielsweise eine Fläche des Zylinderkopfrohlings bearbeitet, wobei dann diese Fläche die Basisfläche für weitere Bearbeitungen ist.Such positioning surfaces on the gas exchange channel rake of a cylinder head of an internal combustion engine are known and used in order to position the cast cylinder head blank more or less defined for the so-called adjustment or initial receiving processing. In this processing, then, starting from the positioning surfaces, for example, a surface of the cylinder head blank is processed, in which case this surface is the base surface for further processing.
Im Zuge der Erfüllung von strengen Abgasgesetzgebungsvorschriften ist es heutzutage wichtig, dass bei einem solchermaßen hergestellten Zylinderkopf die Luftströmung durch die einzelnen Gaswechselkanäle, die durch die Gaswechselkanalrechen gebildet werden, möglichst einheitlich ist.In the course of the fulfillment of strict exhaust gas legislation regulations, it is important today that in a cylinder head produced in this way, the air flow through the individual gas exchange channels, which are formed by the Gaswechselkanalrechen, as uniform as possible.
Der Erfindung liegt die Aufgabe zugrunde, die Positionierflächen eines Gaswechselkanalrechens so auszuwählen und anzuordnen, dass eine zuverlässige und passgenaue Positionierung einer Positioniereinrichtung für die Erstaufnahmebearbeitung erzielt wird.The invention has for its object to select the positioning of a Gaswechselkanalrechens and to order that a reliable and accurate positioning of a positioning device for the Erstaufnahmebearbeitung is achieved.
Diese Aufgabe wird dadurch gelöst, dass die Positionierflächen drei Höhenanschläge, zwei Queranschläge und ein Längsanschlag sind. Durch diese Auswahl ist mit einer Mindestzahl von verschiedenen Positionierflächen eine äußerst passgenaue Positionierung des Zylinderkopfs für eine Erstaufnahmebearbeitung sichergestellt. Dies geschieht in der Form, dass eine Positioniereinrichtung in den entkernten Zylinderkopfrohling eingesetzt wird und diese mit allen genannten Positionierflächen zusammenwirkt. Die so ausgerichtete Positioniereinrichtung ist dann die Grundlage für die Erstaufnahmebearbeitung, dass heißt, ausgehend von beispielsweise Referenzpunkten der Positioniereinrichtung wird die Bearbeitungsmaschine gesteuert und es werden eine oder mehrere Flächen und/oder Bohrungen oder Ähnliches an dem Zylinderkopf bearbeitet. Danach wird die Positioniereinrichtung entfernt und, ausgehend von den schon bearbeiteten Flächen und/oder Bohrungen, werden die weiteren notwendigen Bearbeitungen des Zylinderkopfs insbesondere auch in dem Bereich vorgenommen, der durch die zunächst angebrachte Positioniereinrichtung nicht bearbeitet werden konnte. Hierzu zählt beispielsweise die Fertigung der Ausnehmungen zur Aufnahme der Ventilsitzringe. Es ist einsichtig, dass deren Lage in Bezug zu den Gaswechselkanälen für das Drallverhalten des Zylinderkopfs besonders wichtig sind.This object is achieved in that the positioning surfaces are three height stops, two transverse stops and a longitudinal stop. By This selection is ensured with a minimum number of different positioning surfaces extremely accurate positioning of the cylinder head for a Erstaufnahmebearbeitung. This is done in the form that a positioning device is inserted into the cored cylinder head blank and this cooperates with all mentioned positioning surfaces. The thus aligned positioning device is then the basis for the Erstaufnahmebearbeitung, that is, starting from, for example, reference points of the positioning device, the processing machine is controlled and one or more surfaces and / or holes or the like are processed on the cylinder head. Thereafter, the positioning is removed and, starting from the already processed surfaces and / or holes, the other necessary processing of the cylinder head are made in particular in the area that could not be processed by the initially mounted positioning. This includes, for example, the manufacture of the recesses for receiving the valve seat rings. It is clear that their position relative to the gas exchange channels for the swirl behavior of the cylinder head are particularly important.
In Weiterbildung der Erfindung sind die Höhenanschläge in Form eines Dreibeins ausgebildet an dem Gaswechselkanalrechen in der Form verteilt angeordnet, dass zwei Höhenanschläge im Bereich von Ventilführungs- butzen von verschiedenen Einlasskanalrechenzähnen angeordnet sind und der dritte Höhenanschlag ist an einem zylinderkopfseitenwandigen Ende eines weiteren Einlasskanalrechenzahnes angeordnet. Diese Anordnung der Höhenanschläge gewährleistet eine exakte Höhenpositionierung der Positioniereinrichtung. Dadurch, dass zwei der Höhenanschläge im Bereich von Ventilführungsbutzen angeordnet sind, ist darüber hinaus sichergestellt, dass keine Beeinflussung des Strömungslaufs der Verbrennungsluft durch den fertigen Einlasskanal im Vergleich zu dem weiteren Einlasskanalrechen gegeben ist. Selbstverständlich können aber auch die Auslass- kanalrechenzähne in der dargestellten Art und Weise zur Positionierung herangezogen werden. In Weiterbildung der Erfindung sind die zwei Höhenanschläge an äußeren Einlasskanalrechenzähnen angeordnet und der dritte Höhenanschlag ist an einem zwischen den äußeren Einlasskanalrechenzähnen angeordneten weiteren Einlasskanalrechenzahn angeordnet. Dadurch ist eine genaue Fixierung der Positioniereinrichtung gewährleistet.In a further development of the invention, the height stops in the form of a tripod are arranged distributed on the gas exchange channel rake in the form that two height stops in the region of Ventilführungs- are arranged by different inlet channel rake teeth and the third height stop is arranged on a cylinder head side wall end of another inlet channel rake tooth. This arrangement of height stops ensures an exact height positioning of the positioning. In addition, because two of the height stops are arranged in the region of valve guide studs, it is ensured that there is no influence on the flow path of the combustion air through the finished inlet duct in comparison to the further inlet duct rake. Of course, however, the outlet channel rake teeth can also be used for positioning in the manner shown. In a development of the invention, the two height stops are arranged on outer inlet channel rake teeth, and the third height stop is arranged on a further inlet channel rake tooth arranged between the outer inlet channel rake teeth. As a result, an accurate fixation of the positioning is guaranteed.
In weiterer Ausgestaltung der Erfindung sind die Queranschläge zumindest an zwei äußeren Einlasskanalrechenzähnen angeordnet. Dies ist für die exakte Ausrichtung der Positioniereinrichtung die günstigste Stelle. Dabei kann darüber hinausgehend an den weiteren Einlasskanalrechenzähnen ebenfalls ein Queranschlag vorhanden sein. Dadurch ist sichergestellt, dass alle Ejnlasskanalrechenzähne in diesem für das Strömungsbild der Verbrennungsluft wichtigen Bereich gleich ausgebildet sind. Die Queranschläge können im Bereich neben den Ventilführungsbutzen angeordnet sein oder aber im Bereich der zylinderkopfbodenseitigen Enden der Ein- lasskanalrechenzähne angeordnet sein. Insbesondere im letzten Fall können an jedem der Einlasskanalrechenzähne Queranschläge vorgesehen sein. Dies ist insbesondere dann der Fall, wenn die Queranschläge nicht in einem Gussbereich angeordnet sind, der später bei der Bearbeitung der Ventilsitzaufnahmeflächen bearbeitet wird, so dass strömungsmäßig einheitliche Kanäle entstehen.In a further embodiment of the invention, the transverse stops are arranged at least on two outer inlet channel rake teeth. This is the best place for the exact alignment of the positioning. In addition, a transverse stop may also be present at the other inlet channel rake teeth. This ensures that all of the injection channel rake teeth are of the same design in this important area for the flow pattern of the combustion air. The transverse stops can be arranged in the region next to the valve guide slugs or else be arranged in the region of the cylinder head bottom ends of the inlet channel rake teeth. In particular, in the latter case, transverse stops can be provided on each of the inlet channel rake teeth. This is particularly the case when the transverse stops are not arranged in a casting area, which is machined later in the processing of the valve seat receiving surfaces, so that fluidly uniform channels arise.
In Weiterbildung der Erfindung ist der Längsanschlag im Bereich neben dem Ventilführungsbutzen oder aber an einem zylinderkopfbodenseitigen Ende eines Einlasskanalrechenzahnes angeordnet. Auch hier können an den weiteren Einlasskanalrechenzähnen ebenfalls (funktionslose) Längsanschläge für die Gewährleistung eines einheitlichen Strömungsverhaltens angeordnet sein; insbesondere dann, wenn der beziehungsweise die Längsanschläge nicht in einem Gussbereich angeordnet sind, der später bei der Bearbeitung der Ventilsitzaufnahmeflächen bearbeitet wird.In a further development of the invention, the longitudinal stop is arranged in the region adjacent to the valve guide or at a cylinder head bottom side end of an intake passage rake tooth. Again, (non-functional) longitudinal stops for ensuring a uniform flow behavior can also be arranged on the other inlet channel rake teeth; in particular if the longitudinal stop (s) are not arranged in a casting area which is later machined during the machining of the valve seat receiving surfaces.
Weitere vorteilhafte Ausgestaltungen der Erfindung sind der Zeichnungsbeschreibung zu entnehmen, in der in den Fig. dargestellte Ausführungsbeispiele der Erfindung näher beschrieben sind. - A -Further advantageous embodiments of the invention are described in the drawings, are described in more detail in the illustrated in the figures embodiments of the invention. - A -
Es zeigen:Show it:
Fig. 1 eine erste Variante eines Gaswechselkanalrechens mit Positionier- flächen und1 shows a first variant of a Gaswechselkanalrechens with positioning surfaces and
Fig. 2 eine zweite Variante eines Gaswechselkanalrechens, bei dem die Queranschläge als Bestandteil der Positionierflächen an anderer Stelle angeordnet sind.Fig. 2 shows a second variant of a Gaswechselkanalrechens, wherein the transverse stops are arranged as part of the positioning at another location.
Der in den Figuren unvollständig dargestellte Gaswechselkanalrechen 1 ist für die Gießform eines vierzylindrigen Zweiventilzylinderkopfs bestimmt. Nicht dargestellt ist der die einzelnen Kanalrechenzähne zusammenhaltende Verbindungsteii, der an dem zyiinderkopfseitenwandigen Ende 6 der Kanalrechenzähne angeordnet ist. An diesem Verbindungsteil sind sowohl die Einlasskanalrechenzähne 2 als auch die Auslasskanalrechenzähne 3 angebracht. Dieses Verbindungsteil verbindet die Kanalrechenzähne außerhalb des (fertigen) Zylinderkopfs. Der Gaswechselkanalrechen ist zusammen mit den weiteren Kernteilen in der Giesform definiert positioniert. Nach dem Gießvorgang und der anschließenden Entkernung muss der Rohzylinderkopf aber weiterbearbeitet werden und beispielsweise passgenau in Bezug zu den Einlasskanälen Ausnehmungen zur Aufnahme von Ventilsitzringen eingearbeitet werden. Hierzu wird eine Positioniereinrichtung in den Gaswechselkanälen eingesetzt und, ausgehend von definierten Referenzpunkten der Positioniereinrichtung, wird quasi eine Justage- oder Erstaufnahmebearbeitung von bestimmten Flächen und/oder Bohrungen an dem Zylinderkopf vorgenommen. Ausgehend von dieser Justage- oder Erstaufnahmebearbeitung können dann die Ausnehmungen für die Ventilsitzringe gefertigt werden.The gas exchange duct rake 1, which is shown incompletely in the figures, is intended for the casting mold of a four-cylinder two-valve cylinder head. Not shown is the zusammenhaltende the individual channel rake Verbindungssteii, which is arranged at the zyiinderkopfseitenwandigen end 6 of the channel rake teeth. At this connection part, both the intake passage rake teeth 2 and the exhaust passage rake teeth 3 are mounted. This connecting part connects the channel rake teeth outside of the (finished) cylinder head. The gas exchange channel rake is positioned defined in the casting mold together with the other core parts. However, after the casting process and the subsequent gutting, the crude cylinder head must be further processed and, for example, recesses for receiving valve seat rings must be machined precisely fitting with respect to the inlet ducts. For this purpose, a positioning device is used in the gas exchange channels and, starting from defined reference points of the positioning device, quasi an adjustment or Erstaufnahmebearbeitung made of certain surfaces and / or holes on the cylinder head. Starting from this Justage- or Erstaufnahmebearbeitung then the recesses for the valve seat rings can be made.
Für die genaue Ausrichtung der Positioniereinrichtung sind bei dem Gaswechselkanalrechen 1 gemäß Fig. 1 an die äußeren Einlasskanalrechenzähne 2a, 2d Höhenanschläge 4a, 4d im Bereich von Ventilführungsbutzen 5 angeordnet und ein dritter Höhenanschlag 4b ist bei einem dazwischen liegenden Einlasskanalrechenzahn 2b an dessen zylinderkopfseitenwandi- gem Ende 6 angebracht. Die Höhenanschläge 4a, 4b, 4d bilden dabei ein Dreibein und gewährleisten eine sichere Positionierung der Positioniereinrichtung. Queranschläge 7a, 7d sind wiederum an den äußeren Einlasska- nalrechenzähnen 2a, 2d angeordnet und zwar an deren zylinderkopfboden- seitigen Enden. Ein Längsanschlag 8 ist an dem zylinderkopfseitigen Ende des Einlasskanalrechenzahns 2c angeordnet. Sowohl die Queranschläge 7a, 7b als auch der Längsanschlag 8 liegen in einem Bereich des fertig bearbeiteten Zylinderkopfs, in dem eine maschinelle Bearbeitung zur Schaf- fung von Aufnahmeausnehmungen für Ventilsitzringe erfolgt.For the exact alignment of the positioning device in the gas exchange channel rake 1 according to FIG. 1 at the outer inlet channel rake teeth 2a, 2d height stops 4a, 4d are arranged in the region of Ventilführungsbutzen 5 and a third height stop 4b is at one in between lying inlet channel rake tooth 2b attached to the cylinder head sidewall end 6. The height stops 4a, 4b, 4d form a tripod and ensure a secure positioning of the positioning. Transverse stops 7a, 7d are in turn arranged on the outer inlet channel rake teeth 2a, 2d, namely on their cylinder head base side ends. A longitudinal stopper 8 is disposed at the cylinder head side end of the intake passage rake tooth 2c. Both the transverse stops 7a, 7b and the longitudinal stop 8 lie in a region of the finished cylinder head, in which a machining operation is carried out to create receiving recesses for valve seat rings.
Im Unterschied hierzu sind bei dem Gaswechselkanalrechen gemäß Fig. 2 die (mit entsprechenden Gegenstücken zusammenwirkenden) Queranschläge 7a\ 7d* und der Längsanschlag 8' im Bereich neben den Ventii- führungsbutzen 5 der Einlasskanalrechenzähne 2a, 2c und 2d angeordnet. Dieser Bereich ist nicht strömungsbeeinflussend für die Verbrennungsluft. Es können aber auch an allen Einlasskanalrechenzähnen 2 sowohl Queranschläge 7' als auch Längsanschläge 8' vorhanden sein, wenn eine (geringe) Strömungsbeeinflussung anzunehmen ist. Im Rahmen der Erfindung können auch kombinierte Anordnungen gemäß den Fig. 1 und Fig. 2 verwirklicht sein. In contrast, in the gas exchange duct rake according to FIG. 2, the transverse stops 7a 7d * (which cooperate with corresponding counterparts) and the longitudinal stop 8 'are arranged in the area adjacent to the guide slugs 5 of the inlet channel rake teeth 2a, 2c and 2d. This area is not flow-influencing for the combustion air. But it can also be on all inlet channel rake teeth 2 both transverse stops 7 ' and longitudinal stops 8 ' may be present when a (small) flow control is to be assumed. Combined arrangements according to FIGS. 1 and 2 can also be realized within the scope of the invention.
BezugszeichenlisteLIST OF REFERENCE NUMBERS
1 Gaswechselkanalrechen 2 Einlasskanalrechenzahn1 gas exchange duct rake 2 inlet duct rake tooth
3 Auslasskanalrechenzahn3 outlet channel rake tooth
4 Höhenanschlag4 height stop
5 Ventilführungsbutzen5 valve guide trims
6 zylinderkopfseitenwandiges Ende 7 Queranschlag6 cylinder head side wall end 7 transverse stop
8 Längsanschlag 8 longitudinal stop

Claims

A N S P R Ü C H E
1. Gaswechselkanalrechen als Teil einer Gießform für einen Zylinderkopf einer Brennkraftmaschine, wobei der Gaswechselkanalrechen mit anderen Kernteilen sowie Unterkasten und Oberkasten zu der Gießform zusammengesetzt ist, und wobei der Gaswechselkanalrechen für eine Erst- aufnahmebearbeitung Positionierflächen aufweist, dadurch gekennzeichnet, dass die Positionierflächen drei Höhenanschläge (4), zwei Queranschläge (7) und ein Längsanschlag (8) sind.1. Gas exchange duct rake as part of a casting mold for a cylinder head of an internal combustion engine, wherein the gas exchange duct rake is assembled with other core parts and lower box and upper box to form the casting mold, and wherein the gas exchange channel rake for a first receiving processing positioning surfaces, characterized in that the positioning surfaces three height stops ( 4), two transverse stops (7) and a longitudinal stop (8).
2. Gaswechselkanalrechen nach Anspruch 1 , dadurch gekennzeichnet, dass die Höhenanschläge (4a, 4b, 4d) in Form eines Dreibeins ausgebildet an dem Gaswechselkanalrechen (1 ) in der Form verteilt angeordnet sind, dass zwei Höhenanschläge (4a, 4d) im Bereich von Ventilführungsbutzen (5) von verschiedenen Einlasskanalrechen- zähnen (2) angeordnet sind und der dritte Höhenanschlag (4b) an einem zylinderkopfseitenwandigen Ende (6) eines weiteren Einlasskanalrechen- zahnes (2) angeordnet ist.2. Gaswechselkanalrechen according to claim 1, characterized in that the height stops (4a, 4b, 4d) in the form of a tripod formed on the gas exchange channel rake (1) are distributed in the form that two height stops (4a, 4d) in the range of Ventilführungsbutzen (5) of different inlet channel rake teeth (2) are arranged and the third height stop (4b) at a cylinder head side wall end (6) of a further inlet channel rake tooth (2) is arranged.
3. Gaswechselkanalrechen nach Anspruch 2, dadurch gekennzeichnet, dass die zwei Höhenanschläge (4a, 4b) an äuße- ren Einlasskanalrechenzähnen (2a, 2d) angeordnet sind und der dritte Höhenanschlag (4c) an einen zwischen den äußeren Einlasskanalrechenzähnen (2a, 2d) angeordneten weiteren Einlasskanalrechenzahn (2b) angeordnet ist. 3. Gas exchange duct rake according to claim 2, characterized in that the two height stops (4a, 4b) are arranged on outer inlet channel rake teeth (2a, 2d) and the third height stop (4c) is arranged on one between the outer inlet channel rake teeth (2a, 2d) further inlet channel rake tooth (2b) is arranged.
4. Gaswechselkanalrechen nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass die Queranschläge (7) zumindest an zwei äußeren Einlasskanalrechenzähnen (2) angeordnet sind.4. Gaswechselkanalrechen according to one of the preceding claims, characterized in that the transverse stops (7) are arranged at least at two outer inlet channel rake teeth (2).
5. Gaswechselkanalrechen nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass die Queranschläge (7a, 7d) im Bereich neben den Ventilführungsbutzen (5) angeordnet sind.5. Gaswechselkanalrechen according to one of the preceding claims, characterized in that the transverse stops (7a, 7d) are arranged in the area next to the Ventilführungsbutzen (5).
6. Gaswechselkanalrechen nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass die Queranschläge (7a\ 7d') im Bereich der zylinderkopfbodenseitigen Enden der Einlasskanalrechenzähne (2a, 2d) angeordnet sind.6. Gas exchange duct rake according to one of the preceding claims, characterized in that the transverse stops (7a \ 7d ') in the region of the cylinder head bottom side ends of the inlet channel rake teeth (2a, 2d) are arranged.
7. Gaswechselkanalrechen nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass der Längsanschlag (8) im Bereich neben den Ventilführungsbutzen (5) angeordnet ist.7. Gaswechselkanalrechen according to any one of the preceding claims, characterized in that the longitudinal stop (8) in the region adjacent to the Ventilführungsbutzen (5) is arranged.
8. Gaswechselkanalrechen nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass der Längsanschlag (8') an einem zylinder- kopfbodenseitigen Ende eines Einlasskanalrechenzahnes (2c) angeordnet ist. 8. gas exchange duct rake according to one of the preceding claims, characterized in that the longitudinal stop (8 ') at a cylinder head end side of an inlet channel rake tooth (2c) is arranged.
EP09778569.5A 2008-09-29 2009-09-17 Positioning surfaces on a gas exchange channel rake core Active EP2349610B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200810049527 DE102008049527A1 (en) 2008-09-29 2008-09-29 Positioning surfaces on a gas exchange duct rake
PCT/EP2009/006711 WO2010034426A1 (en) 2008-09-29 2009-09-17 Positioning surfaces on a gas exchange channel rake

Publications (2)

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EP2349610A1 true EP2349610A1 (en) 2011-08-03
EP2349610B1 EP2349610B1 (en) 2016-05-04

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EP (1) EP2349610B1 (en)
DE (1) DE102008049527A1 (en)
ES (1) ES2585570T3 (en)
WO (1) WO2010034426A1 (en)

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CN114535511A (en) * 2022-03-09 2022-05-27 广西玉柴机器股份有限公司 Core assembly positioning device and method for improving consistency of air passages of cylinder cover

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WO2010034426A1 (en) 2010-04-01
DE102008049527A1 (en) 2010-04-01
EP2349610B1 (en) 2016-05-04
ES2585570T3 (en) 2016-10-06

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