EP2737188B1 - Cylinder head with liquid-type cooling - Google Patents

Cylinder head with liquid-type cooling Download PDF

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Publication number
EP2737188B1
EP2737188B1 EP12740346.7A EP12740346A EP2737188B1 EP 2737188 B1 EP2737188 B1 EP 2737188B1 EP 12740346 A EP12740346 A EP 12740346A EP 2737188 B1 EP2737188 B1 EP 2737188B1
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EP
European Patent Office
Prior art keywords
cooling
cylinder head
bore
distribution duct
region
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Not-in-force
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EP12740346.7A
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German (de)
French (fr)
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EP2737188A1 (en
Inventor
Manuel Berger
Christian Auer
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AVL List GmbH
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AVL List GmbH
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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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P3/12—Arrangements for cooling other engine or machine parts
    • F01P3/16—Arrangements for cooling other engine or machine parts for cooling fuel injectors or sparking-plugs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F1/242—Arrangement of spark plugs or injectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F1/26—Cylinder heads having cooling means
    • F02F1/36—Cylinder heads having cooling means for liquid cooling
    • F02F1/40—Cylinder heads having cooling means for liquid cooling cylinder heads with means for directing, guiding, or distributing liquid stream 

Definitions

  • the invention relates to a cylinder head with liquid cooling, with a single inlet channel and a single outlet channel per cylinder opening into a combustion chamber, with a fuel injector opening into the combustion chamber and adjacent to the inlet channel and the outlet channel, and with at least one cooling chamber arranged in the cylinder head a region of the fire deck is arranged a substantially parallel to the fire deck extending, in particular drilled or pre-cast cooling distribution channel, which opens into an annular space surrounding the fuel injector, wherein the annular space has at least one substantially radial, first cooling bore, which between a inlet channel and outlet channel trained and adjacent to the fire deck valve land area is directed.
  • cooling channels are arranged only in the vicinity of machine areas that tend to overheat during operation.
  • a cooling water channel is arranged per cylinder between a distributor and an outlet line, which opens into an annular space surrounding a fuel injection device. From the annular space, an outlet channel in the valve land area between inlet channel and outlet channel leads to the main outlet line.
  • the JP 62-169 221 U discloses a cylinder head having two intake and two exhaust valves per cylinder, with an intake passage in the valve land area between the two exhaust valves opening into an annular space surrounding a fuel injector. From this annulus another cooling line leads to the valve land area between inlet and outlet valves and further into a cold room.
  • a cylinder head wherein a cooling channel, coming from a water jacket of the cylinder block, leads into an annular space surrounding an injection nozzle and thereby passes a valve land area between inlet and outlet valve.
  • a cylinder head of a water-cooled internal combustion engine with an intake port and an exhaust port, and one into the combustion chamber opening fuel device known, wherein in the region of the valve land between the two valves, a cooling distribution channel is arranged, which opens into an annular space surrounding the fuel injection device.
  • the fuel injection device is - viewed in the flow direction of the cooling liquid - arranged after the valve land area.
  • the JP 2004-116 387 A discloses an internal combustion engine having one inlet and one outlet valve per cylinder, wherein from an annular space surrounding a central injection device, a cooling bore extends, which is directed to a valve land area.
  • the JP 2008-248894 A discloses a cylinder head having a cooling distribution channel and an annular space around an injection device, wherein a cooling bore extends radially from the annular space.
  • At least one further cooling hole is directed laterally from the annular space and / or from the cooling distributor channel, preferably the tangent area arranged between the inlet channel and the outlet channel, in the direction of flow of the Coolant considered - is arranged downstream of the annulus.
  • the cooling distribution channel arranged upstream of the annular space can have a flow cross-section which, for example at least twice, is greater than the flow cross-section of the first cooling bore and any further cooling bores. This allows a high heat transfer into the coolant.
  • the cooling distribution channel can have the same direction as the first cooling bore (valve throat cooling bore), wherein the axes of the first cooling bore and of the cooling distribution channel can be aligned parallel, preferably coaxially NEN.
  • the first cooling hole is thus arranged diametrically to the cooling distribution channel - with respect to the annular space - whereby the first cooling hole can be drilled from the side of the cooling distribution channel. This is in particular easily possible if the annular space is formed by a cast slug of the cylinder head and a receiving sleeve for the fuel injection device inserted into a bore of the cast iron casing.
  • a second cooling hole in the region of the fire deck preferably in the region of the junction of the cooling distribution channel in the annulus, be arranged.
  • a third cooling bore can emanate from an upper region of the annular space, wherein preferably the third cooling bore is spaced from the second cooling bore-viewed in the direction of the cylinder axis. This third cooling hole can also be used to vent the annulus.
  • the cylinder head 1 of an internal combustion engine cooled with coolant has an inlet channel 2 and an outlet channel 3 per cylinder, inlet channel 2 and outlet channel 3 opening via an inlet opening 4 and an outlet opening 5, respectively, into a combustion chamber (not further described).
  • Inlet and outlet ports 4, 5 are controlled by not shown lifting valves.
  • the cylinder head 1 has at least one cooling space 20, wherein in a region of the fire deck 9 of the cylinder head 1 a material accumulation 10 is arranged with a substantially parallel to the fire deck 9 extending, drilled or cast cooling distribution channel 11, which in a fuel injector 7 surrounding annular space for cooling the fuel injection device 7 opens.
  • the annular space 8 is through the slug 6 and a in formed the slug 6 receiving sleeve 12 for the fuel injection device 7.
  • the annular space 8 has a radial first cooling bore 13, which is directed onto a valve web area 14 arranged between the inlet opening 4 and the outlet opening 5.
  • the valve land area 14 is located - viewed in the flow direction of the coolant - downstream of the annular space 8.
  • the first cooling hole 13, which serves to cool the valve land area 14, has the same orientation as the cooling distribution channel 11, the axes 11a, 13a of the cooling distribution channel 11th and the first cooling hole 13 are parallel, preferably coaxially aligned and are easier to produce.
  • the cooling distribution channel 11 arranged upstream of the annular space 8 has a flow cross-section which is equal to or substantially larger, for example twice as large as the flow cross-section of the first cooling bore 13.
  • a second cooling bore 15 and a third cooling bore 16 extend from the annular space 8 and / or from the cooling distribution channel 11, the second cooling bore 15 being arranged in the region of the fire deck 9, for example in the region of the junction of the cooling distribution channel 13 into the annular space 8 can.
  • the third cooling bore 16 starts from an upper region 8a of the annular space 8 facing away from the fire deck 9 and is spaced from the second cooling bore 15 - viewed in the direction of the cylinder axis 1a.
  • the second cooling bore 15 and / or the third cooling bore 16 is approximately tangential to the second cooling bore 15 directed to the cooling chamber 20 outer surface 3a of the outlet channel 3.
  • cooling distribution channel 13 opens a fire deck 9 penetrating supply bore 17, which emanates from the adjacent to a cylinder block not shown cylinder head density plane 18.
  • About the supply hole 17 of the cooling distribution channel 13 is connected to a cooling jacket in the cylinder block or a water distribution bar in flow communication.
  • the coolant flows according to the arrows S coming from the cooling jacket of the cylinder block through the supply hole 17 in the cooling distribution channel 13 and further into the annular space 13, where the receiving sleeve 12 flows around and thus the fuel injection device 7 is cooled. Thereafter, the coolant flows through the first cooling hole 13 to the valve land portion 14 between the inlet port 4 and the outlet port 5, which is thereby sufficiently cooled. At the same time, coolant also flows through the second bore 15 and the third Bore 16 to the outer surface 3a of the outlet channel 3 and ensures optimum cooling of the outlet channels.
  • the cooling effect achieved can be adapted to the respective requirements.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Fuel-Injection Apparatus (AREA)

Description

Die Erfindung betrifft einen Zylinderkopf mit Flüssigkeitskühlung, mit einem in einen Brennraum mündenden einzigen Einlasskanal und einem einzigen Auslasskanal pro Zylinder, mit einer in den Brennraum einmündenden und an den Einlasskanal und den Auslasskanal angrenzenden Kraftstoffeinspritzeinrichtung, sowie mit zumindest einem im Zylinderkopf angeordneten Kühlraum, wobei in einem Bereich des Feuerdeckes ein im wesentlichen parallel zum Feuerdeck verlaufender, insbesondere gebohrter oder vorgegossener, Kühlverteilerkanal angeordnet ist, welcher in einen die Kraftstoffeinspritzeinrichtung umgebenden Ringraum einmündet, wobei der Ringraum zumindest eine im Wesentlichen radiale, erste Kühlbohrung aufweist, welche auf einen zwischen Einlasskanal und Auslasskanal ausgebildeten und an das Feuerdeck grenzenden Ventilstegbereich gerichtet ist.The invention relates to a cylinder head with liquid cooling, with a single inlet channel and a single outlet channel per cylinder opening into a combustion chamber, with a fuel injector opening into the combustion chamber and adjacent to the inlet channel and the outlet channel, and with at least one cooling chamber arranged in the cylinder head a region of the fire deck is arranged a substantially parallel to the fire deck extending, in particular drilled or pre-cast cooling distribution channel, which opens into an annular space surrounding the fuel injector, wherein the annular space has at least one substantially radial, first cooling bore, which between a inlet channel and outlet channel trained and adjacent to the fire deck valve land area is directed.

Aus der DE 24 29 355 A1 ist eine Verbrennungskraftmaschine mit einem, kühlmitteldurchströmte Kanäle aufweisenden Kühlsystem bekannt, wobei die Kühlkanäle nur in der Nähe von Maschinenbereichen angeordnet sind, die im Betrieb zur Überhitzung neigen. Im Zylinderkopf ist dabei pro Zylinder zwischen einer Verteiler- und einer Auslassleitung ein Kühlwasserkanal angeordnet, welcher in einem eine Kraftstoffeinspritzeinrichtung umgebenden Ringraum einmündet. Vom Ringraum führt ein Auslasskanal im Ventilstegbereich zwischen Einlasskanal und Auslasskanal zur Hauptauslassleitung.From the DE 24 29 355 A1 is an internal combustion engine with a coolant flow channels having cooling system known, the cooling channels are arranged only in the vicinity of machine areas that tend to overheat during operation. In the cylinder head, a cooling water channel is arranged per cylinder between a distributor and an outlet line, which opens into an annular space surrounding a fuel injection device. From the annular space, an outlet channel in the valve land area between inlet channel and outlet channel leads to the main outlet line.

Die JP 62-169 221 U offenbart einen Zylinderkopf mit zwei Einlass- und zwei Auslassventilen pro Zylinder, wobei ein Zulaufkanal im Ventilstegbereich zwischen den beiden Auslassventilen in einen eine Kraftstoffeinspritzdüse umgebenden Ringraum mündet. Von diesem Ringraum führt eine weitere Kühlleitung zum Ventilstegbereich zwischen Einlass- und Auslassventil und weiter in einen Kühlraum.The JP 62-169 221 U discloses a cylinder head having two intake and two exhaust valves per cylinder, with an intake passage in the valve land area between the two exhaust valves opening into an annular space surrounding a fuel injector. From this annulus another cooling line leads to the valve land area between inlet and outlet valves and further into a cold room.

Ferner ist aus der JP 01-114 917 U eine Zylinderkopf bekannt, wobei ein Kühlkanal, von einem Wassermantel des Zylinderblockes kommend, in einen eine Einspritzdüse umgebenden Ringraum führt und dabei einen Ventilstegbereich zwischen Ein- und Auslassventil passiert.Furthermore, from the JP 01-114 917 U a cylinder head, wherein a cooling channel, coming from a water jacket of the cylinder block, leads into an annular space surrounding an injection nozzle and thereby passes a valve land area between inlet and outlet valve.

Aus der AT 389 565 B ist ein Zylinderkopf einer wassergekühlten Brennkraftmaschine mit einem Einlasskanal und einem Auslasskanal, sowie einer in den Brennraum mündenden Kraftstoffeinrichtung bekannt, wobei im Bereich des Ventilsteges zwischen den beiden Ventilen ein Kühlverteilerkanal angeordnet ist, welcher in einen die Kraftstoffeinspritzeinrichtung umgebenden Ringraum einmündet. Die Kraftstoffeinspritzeinrichtung ist dabei - in Strömungsrichtung der Kühlflüssigkeit betrachtet - nach dem Ventilstegbereich angeordnet.From the AT 389 565 B is a cylinder head of a water-cooled internal combustion engine with an intake port and an exhaust port, and one into the combustion chamber opening fuel device known, wherein in the region of the valve land between the two valves, a cooling distribution channel is arranged, which opens into an annular space surrounding the fuel injection device. The fuel injection device is - viewed in the flow direction of the cooling liquid - arranged after the valve land area.

Die JP 2004-116 387 A offenbart eine Brennkraftmaschine mit einem Einlass- und einem Auslassventil pro Zylinder, wobei von einem eine zentrale Einspritzeinrichtung umgebenden Ringraum eine Kühlbohrung ausgeht, welche auf einen Ventilstegbereich gerichtet ist.The JP 2004-116 387 A discloses an internal combustion engine having one inlet and one outlet valve per cylinder, wherein from an annular space surrounding a central injection device, a cooling bore extends, which is directed to a valve land area.

Die JP 2008-248894 A offenbart einen Zylinderkopf mit einem Kühlverteilerkanal und einem Ringraum um eine Einspritzeinrichtung, wobei vom Ringraum radial eine Kühlbohrung ausgeht.The JP 2008-248894 A discloses a cylinder head having a cooling distribution channel and an annular space around an injection device, wherein a cooling bore extends radially from the annular space.

Ähnliche Kühlanordnungen, bei denen die Kühlung der Kraftstoffeinspritzeinrichtung erst nach dem Ventilstegbereich erfolgt, sind aus den Veröffentlichungen DE 20 37 315 A1 , DE 32 08 341 A1 oder DE 24 17 925 A1 bekannt.Similar cooling arrangements in which the cooling of the fuel injection device takes place only after the valve land area, are from the publications DE 20 37 315 A1 . DE 32 08 341 A1 or DE 24 17 925 A1 known.

Es hat sich gezeigt, dass bei den bekannten Anordnung in manchen Betriebsbereichen die Kühlung von einigen thermisch kritischen Bereichen, beispielsweise im Bereich der Kraftstoffeinspritzeinrichtung und/oder des Auslasskanals, mangelhaft sein kann.It has been found that in the known arrangement in some operating areas, the cooling of some thermally critical areas, for example in the region of the fuel injection device and / or the outlet channel, may be deficient.

Es ist die Aufgabe der Erfindung, diese Nachteile zu vermeiden, und die Kühlung von thermisch kritischen Bereichen zu verbessern.It is the object of the invention to avoid these disadvantages, and to improve the cooling of thermally critical areas.

Erfindungsgemäß wird dies dadurch erreicht, dass vom Ringraum und/oder vom Kühlverteilerkanal seitlich zumindest eine, im Wesentlichen tangential auf eine dem Kühlraum zugewandte Außenfläche des Auslasskanals gerichtete, weitere Kühlbohrung ausgeht, wobei vorzugsweise der zwischen dem Einlasskanal und dem Auslasskanal angeordnete Ventilstegbereich - in Strömungsrichtung des Kühlmittels betrachtet - stromabwärts des Ringraumes angeordnet ist.According to the invention, this is achieved by the fact that at least one further cooling hole is directed laterally from the annular space and / or from the cooling distributor channel, preferably the tangent area arranged between the inlet channel and the outlet channel, in the direction of flow of the Coolant considered - is arranged downstream of the annulus.

Der stromaufwärts des Ringraumes angeordnete Kühlverteilerkanal kann einen Strömungsquerschnitt aufweisen, welcher, beispielsweise mindestens um das 2-fache, größer ist, als der Strömungsquerschnitt der ersten Kühlbohrung sowie allfälliger weiterer Kühlbohrungen. Dadurch wird ein hoher Wärmeübergang in das Kühlmittel ermöglicht.The cooling distribution channel arranged upstream of the annular space can have a flow cross-section which, for example at least twice, is greater than the flow cross-section of the first cooling bore and any further cooling bores. This allows a high heat transfer into the coolant.

Der Kühlverteilerkanal kann dabei die gleiche Richtung wie die erste Kühlbohrung (Ventilstegkühlbohrung) aufweisen, wobei die Achsen der ersten Kühlbohrung und des Kühlverteilerkanals parallel, vorzugsweise koaxial ausgerichtet sein kön nen. Die erste Kühlbohrung ist somit diametral zum Kühlverteilerkanal - bezogen auf den Ringraumes - angeordnet, wodurch die erste Kühlbohrung von der Seite des Kühlverteilerkanals gebohrt werden kann. Dies ist insbesondere dann einfach möglich, wenn der Ringraum von einem Gussbutzen des Zylinderkopfes und einem in eine Bohrung des Gussbutzens eingesetzte Aufnahmehülse für die Kraftstoffeinspritzeinrichtung gebildet ist.The cooling distribution channel can have the same direction as the first cooling bore (valve throat cooling bore), wherein the axes of the first cooling bore and of the cooling distribution channel can be aligned parallel, preferably coaxially NEN. The first cooling hole is thus arranged diametrically to the cooling distribution channel - with respect to the annular space - whereby the first cooling hole can be drilled from the side of the cooling distribution channel. This is in particular easily possible if the annular space is formed by a cast slug of the cylinder head and a receiving sleeve for the fuel injection device inserted into a bore of the cast iron casing.

Zur Zufuhr des Kühlmittels kann vorgesehen sein, dass in den Kühlverteilerkanal zumindest eine von der Zylinderkopfdichtebene ausgehende Versorgungsbohrung einmündet. Es besteht auch die Möglichkeit den Kühlverteilerkanal und die Versorgungsbohrung vorzugießen.For supplying the coolant, it may be provided that at least one supply bore extending from the cylinder head sealing plane into the cooling distributor duct opens. It is also possible to pre-pour the cooling distribution channel and the supply bore.

Um weitere kritische Bereich des Auslasskanals effektiv zu kühlen, ist es besonders vorteilhaft wenn eine zweite Kühlbohrung im Bereich des Feuerdeckes, vorzugsweise im Bereich der Einmündung des Kühlverteilerkanals in den Ringraum, angeordnet sein. Weiters kann eine dritte Kühlbohrung von einem oberen Bereich des Ringraumes ausgehen, wobei vorzugsweise die dritte Kühlbohrung von der zweiten Kühlbohrung - in Richtung der Zylinderachse betrachtet - beabstandet ist. Diese dritte Kühlbohrung kann auch zur Entlüftung des Ringraumes verwendet werden.In order to effectively cool further critical region of the outlet channel, it is particularly advantageous if a second cooling hole in the region of the fire deck, preferably in the region of the junction of the cooling distribution channel in the annulus, be arranged. Furthermore, a third cooling bore can emanate from an upper region of the annular space, wherein preferably the third cooling bore is spaced from the second cooling bore-viewed in the direction of the cylinder axis. This third cooling hole can also be used to vent the annulus.

Auf diese Weise kann eine sehr effektive Kühlung um die Kraftstoffeinspritzeinrichtung, des Auslasskanals und des Bereiches des Ventilsteges zwischen den beiden Ventilen erzielt werden.In this way, a very effective cooling can be achieved around the fuel injection device, the outlet channel and the area of the valve web between the two valves.

Die Erfindung wird im Folgenden anhand der Figuren näher erläutert. Es zeigen:

Fig. 1
einen erfindungsgemäßen Zylinderkopf in einem Schnitt gemäß der Linie I-I in Fig. 2;
Fig. 2
den Zylinderkopf in einem Schnitt gemäß der Linie II-II in Fig. 1;
Fig. 3
dem Zylinderkopf in einem Schnitt gemäß der Linie III-III in Fig. 1; und
Fig. 4
den Zylinderkopf in einer Schrägansicht.
The invention will be explained in more detail below with reference to FIGS. Show it:
Fig. 1
a cylinder head according to the invention in a section along the line II in Fig. 2 ;
Fig. 2
the cylinder head in a section along the line II-II in Fig. 1 ;
Fig. 3
the cylinder head in a section along the line III-III in Fig. 1 ; and
Fig. 4
the cylinder head in an oblique view.

Der Zylinderkopf 1 einer mit Kühlflüssigkeit gekühlten Brennkraftmaschine weist einen Einlasskanal 2 und einen Auslasskanal 3 pro Zylinder auf, wobei Einlasskanal 2 und Auslasskanal 3 über eine Einlassöffnung 4 bzw. eine Auslassöffnung 5 in einen nicht weiter bezeichneten Brennraum einmünden. Einlass- und Auslassöffnungen 4, 5 werden durch nicht weiter dargestellte Hubventile gesteuert. Angrenzend an Einlasskanal 2 und Auslasskanal 3 ist ein Butzen 6 (Gussbutzen) zur Aufnahme einer in den Brennraum mündenden Kraftstoffeinspritzeinrichtung 7 angeordnet.The cylinder head 1 of an internal combustion engine cooled with coolant has an inlet channel 2 and an outlet channel 3 per cylinder, inlet channel 2 and outlet channel 3 opening via an inlet opening 4 and an outlet opening 5, respectively, into a combustion chamber (not further described). Inlet and outlet ports 4, 5 are controlled by not shown lifting valves. Adjacent to inlet channel 2 and outlet channel 3, a slug 6 (cast slug) for receiving a fuel injection device 7 opening into the combustion chamber is arranged.

Der Zylinderkopf 1 weist zumindest einen Kühlraum 20 auf, wobei in einem Bereich des Feuerdeckes 9 des Zylinderkopfes 1 eine Materialanhäufung 10 mit einem im Wesentlichen parallel zum Feuerdeck 9 verlaufenden, gebohrten oder gegossenen Kühlverteilerkanal 11 angeordnet ist, welcher in einen die Kraftstoffeinspritzeinrichtung 7 umgebenden Ringraum 8 zur Kühlung der Kraftstoffeinspritzeinrichtung 7 einmündet. Der Ringraum 8 wird durch den Butzen 6 und eine in den Butzen 6 eingesteckte Aufnahmehülse 12 für die Kraftstoffeinspritzeinrichtung 7 gebildet.The cylinder head 1 has at least one cooling space 20, wherein in a region of the fire deck 9 of the cylinder head 1 a material accumulation 10 is arranged with a substantially parallel to the fire deck 9 extending, drilled or cast cooling distribution channel 11, which in a fuel injector 7 surrounding annular space for cooling the fuel injection device 7 opens. The annular space 8 is through the slug 6 and a in formed the slug 6 receiving sleeve 12 for the fuel injection device 7.

Der Ringraum 8 weist im Bereich des Feuerdeckes 9 eine radiale erste Kühlbohrung 13, welche auf einen zwischen Einlassöffnung 4 und Auslassöffnung 5 angeordneten Ventilstegbereich 14 gerichtet ist. Der Ventilstegbereich 14 befindet sich dabei - in Strömungsrichtung des Kühlmittels betrachtet - stromabwärts des Ringraumes 8. Die erste Kühlbohrung 13, welche zur Kühlung des Ventilstegbereiches 14 dient, weist die gleiche Orientierung auf wie der Kühlverteilerkanal 11, wobei die Achsen 11a, 13a des Kühlverteilerkanals 11 und der ersten Kühlbohrung 13 parallel, vorzugsweise koaxial ausgerichtet sind und so einfacher herstellbar sind.In the area of the fire deck 9, the annular space 8 has a radial first cooling bore 13, which is directed onto a valve web area 14 arranged between the inlet opening 4 and the outlet opening 5. The valve land area 14 is located - viewed in the flow direction of the coolant - downstream of the annular space 8. The first cooling hole 13, which serves to cool the valve land area 14, has the same orientation as the cooling distribution channel 11, the axes 11a, 13a of the cooling distribution channel 11th and the first cooling hole 13 are parallel, preferably coaxially aligned and are easier to produce.

Der stromaufwärts des Ringraumes 8 angeordnete Kühlverteilerkanal 11 weist einen Strömungsquerschnitt auf, welcher gleich groß oder wesentlich größer, beispielsweise doppelt so groß, wie der Strömungsquerschnitt der ersten Kühlbohrung 13 ist.The cooling distribution channel 11 arranged upstream of the annular space 8 has a flow cross-section which is equal to or substantially larger, for example twice as large as the flow cross-section of the first cooling bore 13.

Im Ausführungsbeispiel geht vom Ringraum 8 und/oder vom Kühlverteilerkanal 11 weiters eine zweite Kühlbohrung 15 und eine dritte Kühlbohrung 16 aus, wobei die zweite Kühlbohrung 15 im Bereich des Feuerdeckes 9, beispielsweise im Bereich der Einmündung des Kühlverteilerkanals 13 in den Ringraum 8, angeordnet sein kann. Die dritte Kühlbohrung 16 geht von einem dem Feuerdeck 9 abgewandten oberen Bereich 8a des Ringraumes 8 aus und ist von der zweiten Kühlbohrung 15 - in Richtung der Zylinderachse 1a betrachtet - beabstandet Die zweite Kühlbohrung 15 und/oder die dritte Kühlbohrung 16 ist etwa tangential auf die dem Kühlraum 20 zugewandte Außenfläche 3a des Auslasskanals 3 gerichtet.In the exemplary embodiment, a second cooling bore 15 and a third cooling bore 16 extend from the annular space 8 and / or from the cooling distribution channel 11, the second cooling bore 15 being arranged in the region of the fire deck 9, for example in the region of the junction of the cooling distribution channel 13 into the annular space 8 can. The third cooling bore 16 starts from an upper region 8a of the annular space 8 facing away from the fire deck 9 and is spaced from the second cooling bore 15 - viewed in the direction of the cylinder axis 1a. The second cooling bore 15 and / or the third cooling bore 16 is approximately tangential to the second cooling bore 15 directed to the cooling chamber 20 outer surface 3a of the outlet channel 3.

In den Kühlverteilerkanal 13 mündet eine das Feuerdeck 9 durchdringende Versorgungsbohrung 17 ein, welche von der an einen nicht weiter dargestellten Zylinderblock grenzenden Zylinderkopfdichtebene 18 ausgeht. Über die Versorgungsbohrung 17 steht der Kühlverteilerkanal 13 mit einem Kühlmantel im Zylinderblock oder einer Wasserverteilleiste in Strömungsverbindung.In the cooling distribution channel 13 opens a fire deck 9 penetrating supply bore 17, which emanates from the adjacent to a cylinder block not shown cylinder head density plane 18. About the supply hole 17 of the cooling distribution channel 13 is connected to a cooling jacket in the cylinder block or a water distribution bar in flow communication.

Das Kühlmittel strömt entsprechend den Pfeilen S vom Kühlmantel des Zylinderblockes kommend durch die Versorgungsbohrung 17 in den Kühlverteilerkanal 13 und weiter in den Ringraum 13, wo die Aufnahmehülse 12 umströmt und somit die Kraftstoffeinspritzeinrichtung 7 gekühlt wird. Danach strömt das Kühlmittel durch die erste Kühlbohrung 13 zum Ventilstegbereich 14 zwischen der Einlassöffnung 4 und der Auslassöffnung 5, welcher dadurch ausreichend gekühlt wird. Gleichzeitig strömt Kühlmittel auch durch die zweite Bohrung 15 und die dritte Bohrung 16 zur Außenfläche 3a des Auslasskanals 3 und sorgt für eine optimale Kühlung der Auslasskanäle. Durch geeignete Dimensionierung der Querschnitte der ersten, zweiten und dritten Kühlbohrung 13, 15, 16 lässt sich die erzielte Kühlwirkung an die jeweiligen Anforderungen anpassen. Nach Kühlung der kritischen Bereiche des Kraftstoffeinritzeinrichtung 7, des Ventilstegbereiches 14 und des Auslasskanals 3 wird das Kühlmittel im Kühlraum 20 gesammelt und durch nicht weiter dargestellte Austrittsöffnungen aus dem Zylinderkopf 1 abgeführt.The coolant flows according to the arrows S coming from the cooling jacket of the cylinder block through the supply hole 17 in the cooling distribution channel 13 and further into the annular space 13, where the receiving sleeve 12 flows around and thus the fuel injection device 7 is cooled. Thereafter, the coolant flows through the first cooling hole 13 to the valve land portion 14 between the inlet port 4 and the outlet port 5, which is thereby sufficiently cooled. At the same time, coolant also flows through the second bore 15 and the third Bore 16 to the outer surface 3a of the outlet channel 3 and ensures optimum cooling of the outlet channels. By suitable dimensioning of the cross sections of the first, second and third cooling bores 13, 15, 16, the cooling effect achieved can be adapted to the respective requirements. After cooling the critical areas of the Kraftstoffeinritzeinrichtung 7, the valve land portion 14 and the outlet channel 3, the coolant is collected in the cooling chamber 20 and discharged through not shown outlet openings of the cylinder head 1.

Claims (8)

  1. A cylinder head (1) with liquid cooling, comprising one intake port (2), which opens into a combustion chamber, and one exhaust port (3) per cylinder, a fuel injection device (7) which opens into the combustion chamber and which adjoins the intake port (2) and the exhaust port (3), and at least one cooling chamber (20) which is arranged in the cylinder head (1), wherein a cooling distribution duct (11) is arranged in a region of the fire deck (9), which cooling distribution duct extends substantially parallel to the fire deck (9) and is especially drilled or pre-cast, and which opens into an annular chamber (8) surrounding the fuel injection device (7), wherein the annular chamber (8) has at least one substantially radial first cooling bore (13), which is directed towards a valve web region (14) formed between the intake port (2) and the exhaust port (3) and which adjoins the fire deck (9), characterised in that at least one further cooling bore (15, 16), which is directed substantially tangentially towards an outside surface (3a) of the exhaust port (3) facing the cooling chamber (20), originates laterally from the annular chamber (8) and/or from the cooling distribution duct (11).
  2. A cylinder head (1) according to claim 1, characterised in that the valve web region (14) arranged between the intake port (2) and the exhaust port (3) is arranged downstream of the annular chamber (8), as seen in the direction of flow of the coolant.
  3. A cylinder head (1) according to claim 1 or 2, characterised in that the cooling distribution duct (11), which is arranged upstream of the annular chamber (8), has a flow cross-section which is larger, preferably at least twice as large, as the flow cross-section of the first cooling bore (13).
  4. A cylinder head (1) according to one of the claims 1 to 3, characterised in that the cooling distribution duct (11) has the same direction as the first cooling bore (13), and the axes (13a, 11a) of the first cooling bore (13) and the cooling distribution duct (11) are aligned in parallel, preferably coaxially.
  5. A cylinder head (1) according to one of the claims 1 to 4, characterised in that at least one supply bore (17) originating from the cylinder head sealing plane (18) opens into the cooling distribution duct (11).
  6. A cylinder head (1) according to one of the claims 1 to 5, characterised in that at least one second cooling bore (15) is arranged in the region of the fire deck (9), preferably in the region of the orifice of the cooling distribution duct (11) into the annular chamber (8).
  7. A cylinder head (1) according to one of the claims 1 to 6, characterised in that at least one third cooling bore (16) originates from an upper region (8a) of the annular chamber (8), wherein preferably the third cooling bore (16) is spaced from the second cooling bore (15), as seen in the direction of the cylinder axis (1a).
  8. A cylinder head (1) according to one of the claims 1 to 7, characterised in that the annular space (8) is formed by a slug (6) of the cylinder head (1) and a receiving sleeve (12) for the fuel injection device (7) which is inserted into a bore of the slug (6).
EP12740346.7A 2011-07-28 2012-07-23 Cylinder head with liquid-type cooling Not-in-force EP2737188B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA1104/2011A AT511601B1 (en) 2011-07-28 2011-07-28 CYLINDER HEAD WITH LIQUID COOLING
PCT/EP2012/064366 WO2013014113A1 (en) 2011-07-28 2012-07-23 Cylinder head with liquid-type cooling

Publications (2)

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EP2737188A1 EP2737188A1 (en) 2014-06-04
EP2737188B1 true EP2737188B1 (en) 2017-01-11

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US (1) US9309830B2 (en)
EP (1) EP2737188B1 (en)
CN (1) CN103827461B (en)
AT (1) AT511601B1 (en)
RU (1) RU2596084C2 (en)
WO (1) WO2013014113A1 (en)

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Publication number Publication date
AT511601A4 (en) 2013-01-15
CN103827461B (en) 2017-11-17
RU2014107706A (en) 2015-09-10
WO2013014113A1 (en) 2013-01-31
RU2596084C2 (en) 2016-08-27
CN103827461A (en) 2014-05-28
EP2737188A1 (en) 2014-06-04
AT511601B1 (en) 2013-01-15
US9309830B2 (en) 2016-04-12
US20140305400A1 (en) 2014-10-16

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