EP0774576A1 - Liquid cooled internal combustion engine cylinder head - Google Patents

Liquid cooled internal combustion engine cylinder head Download PDF

Info

Publication number
EP0774576A1
EP0774576A1 EP96115801A EP96115801A EP0774576A1 EP 0774576 A1 EP0774576 A1 EP 0774576A1 EP 96115801 A EP96115801 A EP 96115801A EP 96115801 A EP96115801 A EP 96115801A EP 0774576 A1 EP0774576 A1 EP 0774576A1
Authority
EP
European Patent Office
Prior art keywords
cooling water
cylinder head
chamber
cooling
combustion engine
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
EP96115801A
Other languages
German (de)
French (fr)
Other versions
EP0774576B1 (en
Inventor
Michael Dohn
Erhard Rau
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.)
Daimler Benz AG
Original Assignee
Daimler Benz AG
Mercedes Benz AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Daimler Benz AG, Mercedes Benz AG filed Critical Daimler Benz AG
Publication of EP0774576A1 publication Critical patent/EP0774576A1/en
Application granted granted Critical
Publication of EP0774576B1 publication Critical patent/EP0774576B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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 
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F1/42—Shape or arrangement of intake or exhaust channels in cylinder heads
    • F02F1/4214—Shape or arrangement of intake or exhaust channels in cylinder heads specially adapted for four or more valves per cylinder
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • 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 liquid-cooled cylinder head for a multi-cylinder internal combustion engine according to the preamble of main claim 1.
  • a generic cylinder head is known from DE 41 16 943 C1.
  • the liquid-cooled cylinder head made from a casting has a cooling water chamber in which, among other things, gas exchange channels and a chamber for receiving an injection nozzle are arranged. Cooling water is introduced from the crankcase into the cooling water chamber of the cylinder head through cooling water bores which are connected to the cooling water jacket of the cylinder housing by cooling water inlets. The cooling water inlets are made through holes. This increases the mechanical processing effort of the cylinder head, since the cylinder head must be positioned and drilled in different positions. The manufacture of the cylinder head is complex and expensive.
  • the cylinder head according to the invention is designed such that the cooling of such an area is separated from the cooling of the rest of the main water space.
  • a cooling water hole which runs from the outlet side of the cylinder head and runs in the transverse direction and is connected to the cooling water jacket of the crankcase by a cooling water inlet.
  • the cooling water hole opens into a narrow area between the outlet valve and the spark plug chamber, but can in principle also be located elsewhere.
  • the cooling of the narrow area is separated from the cooling of the rest of the main water space, a specific cooling of the relatively narrow area between the outlet channel and the spark plug chamber is possible independently of the cooling of the rest of the main water space.
  • the water introduced into the cooling water inlet must make its way through the cooling water hole.
  • the cooling water chamber of the cylinder head is created by two separate water cores.
  • the main water space is formed by the so-called main water core.
  • the cooling water inlet for the separate supply of the narrow area between the outlet valve and the spark plug chamber is formed by the additional water core.
  • the cooling water hole is then drilled.
  • An advantage of the invention according to the main claim 1 lies in the simplified and therefore less expensive manufacture of the cylinder head made from a casting, since the cooling water inlet is formed by casting and a drilling process is thus eliminated. Casting allows the cooling water supply to be designed freely. Exploitation of the profile as small cooling water space "is possible. At the same time, improved cooling of the cylinder head is achieved, since targeted cooling, ie cooling of selected areas that can be coordinated via bores in the seal, can be achieved.
  • the cooling water inlet according to claim 2 forms an additional small cooling water space "within the cooling water space of the cylinder head and at the same time serves for direct cooling of a gas exchange duct or other internals.
  • the embodiment of the invention according to claim 3 leads to an individual design of the inlet and thereby to an influence on the partially desired amount of cooling water.
  • the water throughput through the cooling water borehole can be adjusted as required by dividing the casting core into separate water cores via appropriately selected water cross sections, for example in the cylinder head gasket.
  • a cylinder head 1 for a multi-cylinder internal combustion engine consists of a one-piece casting with a cylinder head base 2 and from there up to a cover parting plane, not shown, for supporting a cylinder head cover, leading longitudinal outer walls 3, 4 and front outer walls 5, 6 .
  • the cylinder head base 2 has a combustion chamber 8 configured as a depression for each cylinder, which has two orifices 9, 10 per cylinder and two further openings 11, 12 of chambers 13, 14 leading into the combustion chamber 8 for receiving spark plugs, injection nozzles or the like.
  • Valve channels 15, 16 extend from the orifices 9, 10 and penetrate the cooling water chamber 7 up to the longitudinal outer walls 3, 4.
  • the valve channel 15 leading away from the opening 9 to the outer wall 3 forms the inlet channel and the valve channel 16 leading away from the opening 10 to the outer wall 4 forms the outlet channel.
  • the V-shaped chambers 13, 14 penetrate the cooling water chamber 7 in the direction of the cylinder head cover.
  • cooling water flows from the cooling water jacket of the crankcase into the cooling water chamber 7 and flows through the cooling water chamber 7 preferably in a transverse direction of the cylinder head.
  • the cooling water then flows out through an outlet opening 19 arranged in the cylinder head housing on the side of the inlet duct 15.
  • This land area 20 passes through a cooling water bore 21, which is made from the outer wall 4 of the cylinder head 1 and runs approximately in the direction of the transverse axis 18 and which extends outwards with a ball 23 or a stopper is closed and opens into the cooling water chamber 7 in the web area 20 between the outlet channel 16 and chamber 13.
  • the cooling water bore 21 is connected to the cooling water jacket of the crankcase by a cooling water inlet 22.
  • cooling water inlet 22 which passes through the cylinder head base 2, cooling water passes out of the cylinder housing and reaches the cooling water chamber 7 via the cooling water bore 21.
  • another mouth region of the cooling water bore is also conceivable.
  • the cooling water inlet 22 is in accordance with the invention as small cooling water space "by casting.
  • the casting allows a free design of the cooling water inlet 22, which consequently allows the cooling water inlet 22 to extend at least partially along the outside of the outlet duct 16, with the result that this region of the outlet duct 16 and the adjacent regions of the cylinder head base are achieved
  • the cooling water inlet 22 has an L-shaped cross-section, and the water introduced into the cooling water inlet 22 must travel through the cooling water bore 21.
  • the cooling water chamber of the cylinder head is produced by a main water core and a separate additional water core.
  • the main water core forms the main water space, which extends between the gas exchange channels or chambers, with the inlet openings and the separate additional water core forms the cooling water inlet.
  • the additional water core is designed as a core strip, which is inserted in the lower part of the mold.
  • the cooling water hole is drilled after casting. It is of course possible to control the water throughput through the cooling water hole through the cross section of the cooling water inlet in the cylinder head base.
  • the cooling water inlet is used as small cooling water space "is possible. Furthermore, the casting enables an individual design of the cooling water inlet and thereby influences the partially desired amount of cooling water.

Landscapes

  • 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)

Abstract

Die Erfindung bezieht sich auf einen flüssigkeitsgekühlten Zylinderkopf (1) für eine mehrzylindrige Brennkraftmaschine mit einem Kühlwasserraum (7), der sich in Kühlwasserraumabschnitte gliedert, die jeweils einem Brennraum (8) zugeordnet sind und durch die Gaswechselkanäle und mindestens eine Kammer (13) für eine Zündkerze oder eine Einspritzdüse verlaufen und in die in deren Bodenbereich zwischen den Gaswechselkanälen und der Kammer mindestens eine in Querrichtung verlaufende Kühlwasserbohrung (21) mündet, die durch einen Kühlwasserzulauf (22) mit dem Kühlwassermantel des Kurbelgehäuses verbunden ist. Um einen flüssigkeitsgekühlten Zylinderkopf (1) für eine mehrzylindrige Brennkraftmaschine so auszubilden, daß eine vereinfachte und damit kostengünstigere Herstellung und gleichzeitig eine verbesserte Kühlung des Zylinderkopfes gewährleistet ist, wird erfindungsgemäß vorgeschlagen, daß der Kühlwasserzulauf durch Gießen hergestellt wird. <IMAGE>The invention relates to a liquid-cooled cylinder head (1) for a multi-cylinder internal combustion engine with a cooling water chamber (7), which is divided into cooling water chamber sections, each of which is assigned to a combustion chamber (8) and through the gas exchange channels and at least one chamber (13) for one Spark plug or an injection nozzle and in the bottom area between the gas exchange channels and the chamber opens at least one transverse cooling water bore (21) which is connected by a cooling water inlet (22) to the cooling water jacket of the crankcase. In order to design a liquid-cooled cylinder head (1) for a multi-cylinder internal combustion engine in such a way that a simplified and therefore more cost-effective production and at the same time an improved cooling of the cylinder head is ensured, the invention proposes that the cooling water supply is produced by casting. <IMAGE>

Description

Die Erfindung bezieht sich auf einen flüssigkeitsgekühlten Zylinderkopf für eine mehrzylindrige Brennkraftmaschine gemäß dem Oberbegriff des Hauptanspruchs 1.The invention relates to a liquid-cooled cylinder head for a multi-cylinder internal combustion engine according to the preamble of main claim 1.

Aus der DE 41 16 943 C1 ist ein gattungsgemäßer Zylinderkopf bekannt. Der aus einem Gußstück hergestellte flüssigkeitsgekühlte Zylinderkopf weist einen Kühlwasserraum auf, in dem unter anderem Gaswechselkanäle und eine Kammer zur Aufnahme einer Einspritzdüse angeordnet sind. Durch Kühlwasserbohrungen, die durch Kühlwasserzuläufe mit dem Kühlwassermantel des Zylindergehäuses verbunden sind, wird Kühlwasser aus dem Kurbelgehäuse in den Kühlwasserraum des Zylinderkopfes eingeleitet. Dabei sind die Kühlwasserzuläufe durch Bohrungen hergestellt. Hierdurch ist der mechanische Bearbeitungsaufwand des Zylinderkopfes erhöht, da der Zylinderkopf in verschiedenen Lagen positioniert und gebohrt werden muß. Die Herstellung des Zylinderkopfes ist aufwendig und teuer.A generic cylinder head is known from DE 41 16 943 C1. The liquid-cooled cylinder head made from a casting has a cooling water chamber in which, among other things, gas exchange channels and a chamber for receiving an injection nozzle are arranged. Cooling water is introduced from the crankcase into the cooling water chamber of the cylinder head through cooling water bores which are connected to the cooling water jacket of the cylinder housing by cooling water inlets. The cooling water inlets are made through holes. This increases the mechanical processing effort of the cylinder head, since the cylinder head must be positioned and drilled in different positions. The manufacture of the cylinder head is complex and expensive.

Zum allgemeinen technischen Hintergrund wird auf die DE 38 19 655 C1 verwiesen.For general technical background, reference is made to DE 38 19 655 C1.

Es ist die Aufgabe der Erfindung einen Zylinderkopf derart auszubilden, daß eine vereinfachte und damit kostengünstigere Herstellung und gleichzeitig eine verbesserte Kühlung des Zylinderkopfes gewährleistet ist.It is the object of the invention to design a cylinder head in such a way that a simplified and therefore less expensive production and at the same time an improved cooling of the cylinder head is ensured.

Diese Aufgabe wird erfindungsgemäß durch die im Kennzeichen des Patentanspruchs 1 gegebenen Merkmale gelöst.This object is achieved by the features given in the characterizing part of patent claim 1.

Brennkraftmaschinen mit verhältnismäßig kleinen Brennräumen haben sehr schmale Bereiche, wie beispielsweise zwischen der Zündkerzenkammer und dem Auslaßkanal. Um auch solche thermisch hoch belasteten Bereiche sinnvoll kühlen zu können ist der erfindungsgemäße Zylinderkopf derart ausgebildet, daß die Kühlung eines solchen Bereiches von der Kühlung des übrigen Hauptwasserraumes abgetrennt ist. Im Bereich des Hauptwasserraumes ist eine von der Auslaßseite des Zylinderkopfes her ausgeführte und in Querrichtung verlaufende Kühlwasserbohrung vorgesehen, die durch einen Kühlwasserzulauf mit dem Kühlwassermantel des Kurbelgehäuses verbunden ist. Die Kühlwasserbohrung mündet in einem schmalen Bereich zwischen Auslaßventil und Kammer der Zündkerze, kann aber prinzipiell auch woanders liegen. Da die Kühlung des schmalen Bereiches von der Kühlung des übrigen Hauptwasserraumes getrennt ist, ist unabhängig von der Kühlung des übrigen Hauptwasserraumes eine gezielte Kühlung des relativ schmalen Bereichs zwischen Auslaßkanal und Zündkerzenkammer möglich. Das in den Kühlwasserzulauf eingesteuerte Wasser muß den Weg durch die Kühlwasserbohrung nehmen. Der Kühlwasserraum des Zylinderkopfes wird durch zwei voneinander getrennte Wasserkerne hergestellt. Der Hauptwasserraum wird vom sogenannten Hauptwasserkern gebildet. Der Kühlwasserzulauf für die getrennte Versorgung des schmalen Bereiches zwischen Auslaßventil und Zündkerzenkammer wird durch den Zusatzwasserkern gebildet. Die Kühlwasserbohrung wird anschließend gebohrt.Engines with relatively small combustion chambers have very narrow areas, such as between the spark plug chamber and the exhaust duct. In order to be able to cool such thermally highly stressed areas sensibly, the cylinder head according to the invention is designed such that the cooling of such an area is separated from the cooling of the rest of the main water space. Provided in the area of the main water space is a cooling water hole, which runs from the outlet side of the cylinder head and runs in the transverse direction and is connected to the cooling water jacket of the crankcase by a cooling water inlet. The cooling water hole opens into a narrow area between the outlet valve and the spark plug chamber, but can in principle also be located elsewhere. Since the cooling of the narrow area is separated from the cooling of the rest of the main water space, a specific cooling of the relatively narrow area between the outlet channel and the spark plug chamber is possible independently of the cooling of the rest of the main water space. The water introduced into the cooling water inlet must make its way through the cooling water hole. The cooling water chamber of the cylinder head is created by two separate water cores. The main water space is formed by the so-called main water core. The cooling water inlet for the separate supply of the narrow area between the outlet valve and the spark plug chamber is formed by the additional water core. The cooling water hole is then drilled.

Ein Vorteil der Erfindung gemäß Hauptanspruch 1 liegt in der vereinfachten und dadurch kostengünstigeren Herstellung des aus einem Gußstück hergestellten Zylinderkopfes, da der Kühlwasserzulauf durch Gießen gebildet wird und damit ein Bohrvorgang entfällt. Das Gießen erlaubt eine freie Gestaltung des Kühlwasserzulaufs. Eine Ausnutzung des Profils als

Figure imgb0001
kleiner Kühlwasserraum" ist möglich. Gleichzeitig wird eine verbesserte Kühlung des Zylinderkopfes erreicht, da eine gezielte, d.h. über Bohrungen in der Dichtung abstimmbare Kühlung ausgewählter Bereiche erreicht werden kann.An advantage of the invention according to the main claim 1 lies in the simplified and therefore less expensive manufacture of the cylinder head made from a casting, since the cooling water inlet is formed by casting and a drilling process is thus eliminated. Casting allows the cooling water supply to be designed freely. Exploitation of the profile as
Figure imgb0001
small cooling water space "is possible. At the same time, improved cooling of the cylinder head is achieved, since targeted cooling, ie cooling of selected areas that can be coordinated via bores in the seal, can be achieved.

Der Kühlwasserzulauf gemäß Anspruch 2 bildet einen zusätzlichen

Figure imgb0001
kleinen Kühlwasserraum" innerhalb des Kühlwasserraums des Zylinderkopfes und dient gleichzeitig zur direkten Kühlung eines Gaswechselkanals oder auch anderer Einbauten.The cooling water inlet according to claim 2 forms an additional
Figure imgb0001
small cooling water space "within the cooling water space of the cylinder head and at the same time serves for direct cooling of a gas exchange duct or other internals.

Die Ausgestaltung der Erfindung nach Anspruch 3 führt zu einer individuellen Gestaltung des Zulaufs und dadurch zu einer Beeinflussung der partiell gewünschten Kühlwassermenge. Der Wasserdurchsatz durch die Kühlwasserbohrung kann durch die Aufteilung des Gießkerns in getrennte Wasserkerne über entsprechend gewählte Wasserdurchschnittsquerschnitte, beispielsweise in der Zylinderkopfdichtung, bedarfsgerecht abgestimmt werden.The embodiment of the invention according to claim 3 leads to an individual design of the inlet and thereby to an influence on the partially desired amount of cooling water. The water throughput through the cooling water borehole can be adjusted as required by dividing the casting core into separate water cores via appropriately selected water cross sections, for example in the cylinder head gasket.

Weitere Ausgestaltungen der Erfindung gehen aus der Beschreibung hervor.Further refinements of the invention emerge from the description.

Ein Ausführungsbeispiel der Erfindung ist im folgenden in zwei Zeichnungen mit weiteren Einzelheiten näher erläutert, und zwar zeigen:

Fig. 1
einen erfindungsgemäßen Zylinderkopf in einer Ansicht von unten und einen Kühlwasserraum des Zylinderkopfes in einem Teilschnitt und
Fig. 2
einen Teilschnitt durch einen Kühlwasserzulauf und eine Kühlwasserbohrung gemäß der Linie I-I aus Fig. 1.
An embodiment of the invention is explained in more detail in the following in two drawings, showing:
Fig. 1
a cylinder head according to the invention in a view from below and a cooling water chamber of the cylinder head in a partial section and
Fig. 2
2 shows a partial section through a cooling water inlet and a cooling water bore according to line II from FIG. 1.

Ein Zylinderkopf 1 für eine hier nicht näher dargestellte mehrzylindrige Brennkraftmaschine besteht aus einem einteiligen Gußstück mit einem Zylinderkopfboden 2 und den von diesem nach oben bis zu einer nicht dargestellten Deckeltrennebene, zur Auflage einer Zylinderkopfhaube, abführenden längsseitigen Außenwänden 3, 4 und stirnseitigen Außenwänden 5, 6.A cylinder head 1 for a multi-cylinder internal combustion engine, not shown here, consists of a one-piece casting with a cylinder head base 2 and from there up to a cover parting plane, not shown, for supporting a cylinder head cover, leading longitudinal outer walls 3, 4 and front outer walls 5, 6 .

Zusammen mit dem Zylinderkopfboden 2 umschließen die Außenwände 3 bis 6 und die durch eine mit Abstand vom Zylinderkopfboden 2 angeordnete, nicht dargestellte Zylinderkopfdecke einen Kühlwasserraum 7.Together with the cylinder head base 2, the outer walls 3 to 6 and enclose them by a distance from the cylinder head base 2 arranged, not shown cylinder head cover a cooling water chamber 7.

Der Zylinderkopfboden 2 besitzt für jeden Zylinder einen als Vertiefung ausgestalteten Brennraum 8, welcher zwei Mündungsöffnungen 9, 10 pro Zylinder aufweist und zwei weitere in den Brennraum 8 führende Öffnungen 11, 12 von Kammern 13, 14 zur Aufnahme von Zündkerzen, Einspritzdüsen oder dergleichen. Von den Mündungsöffnungen 9, 10 gehen Ventilkanäle 15, 16 ab, welche den Kühlwasserraum 7 bis zu den längsseitigen Außenwänden 3, 4 durchsetzen. Der dabei von der Mündungsöffnung 9 zur Außenwand 3 abführende Ventilkanal 15 bildet den Einlaßkanal und der von der Mündungsöffnung 10 zur Außenwand 4 abführende Ventilkanal 16 bildet den Auslaßkanal. Die V-förmig zueinander stehenden Kammern 13, 14 durchsetzen den Kühlwasserraum 7 in Richtung zur Zylinderkopfdecke. Durch im Zylinderkopfboden 2 mit Abstand um den Brennraum 8 angeordnete Einlaßöffnungen 17 strömt Kühlwasser vom Kühlwassermantel des Kurbelgehäuses in den Kühlwasserraum 7 ein und durchströmt den Kühlwasserraum 7 bevorzugt in einer Zylinderkopfquerrichtung. Anschließend strömt das Kühlwasser durch eine im Zylinderkopfgehäuse angeordnete Auslaßöffnung 19 auf der Seite des Einlaßkanals 15 aus.The cylinder head base 2 has a combustion chamber 8 configured as a depression for each cylinder, which has two orifices 9, 10 per cylinder and two further openings 11, 12 of chambers 13, 14 leading into the combustion chamber 8 for receiving spark plugs, injection nozzles or the like. Valve channels 15, 16 extend from the orifices 9, 10 and penetrate the cooling water chamber 7 up to the longitudinal outer walls 3, 4. The valve channel 15 leading away from the opening 9 to the outer wall 3 forms the inlet channel and the valve channel 16 leading away from the opening 10 to the outer wall 4 forms the outlet channel. The V-shaped chambers 13, 14 penetrate the cooling water chamber 7 in the direction of the cylinder head cover. Through inlet openings 17 arranged at a distance around the combustion chamber 8 in the cylinder head base 2, cooling water flows from the cooling water jacket of the crankcase into the cooling water chamber 7 and flows through the cooling water chamber 7 preferably in a transverse direction of the cylinder head. The cooling water then flows out through an outlet opening 19 arranged in the cylinder head housing on the side of the inlet duct 15.

Zwischen Auslaßkanal 16 und Kammer 13 befindet sich ein Stegbereich 20. Diesen Stegbereich 20 durchsetzt eine von der auslaßseitigen Außenwand 4 des Zylinderkopfes 1 her ausgeführte und in etwa in Richtung der Querachse 18 verlaufende Kühlwasserbohrung 21, welche nach außen mit einer Kugel 23 bzw. einem Stopfen verschlossen ist und in den Kühlwasserraum 7 im Stegbereich 20 zwischen Auslaßkanal 16 und Kammer 13 mündet. Die Kühlwasserbohrung 21 ist durch einen Kühlwasserzulauf 22 mit dem Kühlwassermantel des Kurbelgehäuses verbunden. Durch den Kühlwasserzulauf 22, welcher den Zylinderkopfboden 2 durchsetzt, tritt Kühlwasser aus dem Zylindergehäuse über und gelangt über die Kühlwasserbohrung 21 in den Kühlwasserraum 7. Selbstverständlich ist auch ein anderer Mündungsbereich der Kühlwasserbohrung denkbar.Between the outlet channel 16 and the chamber 13 there is a land area 20. This land area 20 passes through a cooling water bore 21, which is made from the outer wall 4 of the cylinder head 1 and runs approximately in the direction of the transverse axis 18 and which extends outwards with a ball 23 or a stopper is closed and opens into the cooling water chamber 7 in the web area 20 between the outlet channel 16 and chamber 13. The cooling water bore 21 is connected to the cooling water jacket of the crankcase by a cooling water inlet 22. Through the cooling water inlet 22, which passes through the cylinder head base 2, cooling water passes out of the cylinder housing and reaches the cooling water chamber 7 via the cooling water bore 21. Of course, another mouth region of the cooling water bore is also conceivable.

Um neben der reinen Strömungsverbindung zwischen der Kühlwasserbohrung 21 und der Kühlwasserzufuhr 22 eine verbesserte Kühlung des Auslaßkanals 16 oder auch anderer Einbauten zu erreichen, ist gemäß der Erfindung der Kühlwasserzulauf 22 als

Figure imgb0001
kleiner Kühlwasserraum" durch Gießen hergestellt. Das Gießen erlaubt eine freie Gestaltung des Kühlwasserzulaufs 22, was demzufolge eine Erstreckung des Kühlwasserzulaufs 22 zumindest teilweise entlang der Außenseite des Auslaßkanals 16 ermöglicht, womit erreicht wird, daß dieser Bereich des Auslaßkanals 16 sowie die angrenzenden Bereiche des Zylinderkopfbodens 2 großflächig vom zufließenden Kühlwasser gekühlt werden. Der Kühlwasserzulauf 22 weist einen L-förmigen Querschnitt auf. Das in den Kühlwasserzulauf 22 eingesteuerte Wasser muß den Weg durch die Kühlwasserbohrung 21 nehmen. Diese gezielte Kühlung des schmalen Bereiches zwischen Auslaßkanal 16 und Zündkerzenkammer 13 und gleichzeitig der Außenseite des Auslaßkanals 16 ist von der Kühlung des übrigen Kühlwasserraumes 7 getrennt. Die Kühlwasserzufuhr in den Kühlwasserzulauf 22 hinein und innerhalb desselben ist in Fig. 2 mit Strömungspfeilen angedeutet.In order to achieve improved cooling of the outlet channel 16 or other internals in addition to the pure flow connection between the cooling water bore 21 and the cooling water supply 22, the cooling water inlet 22 is in accordance with the invention as
Figure imgb0001
small cooling water space "by casting. The casting allows a free design of the cooling water inlet 22, which consequently allows the cooling water inlet 22 to extend at least partially along the outside of the outlet duct 16, with the result that this region of the outlet duct 16 and the adjacent regions of the cylinder head base are achieved The cooling water inlet 22 has an L-shaped cross-section, and the water introduced into the cooling water inlet 22 must travel through the cooling water bore 21. This targeted cooling of the narrow area between the outlet duct 16 and the spark plug chamber 13 and at the same time the The outside of the outlet channel 16 is separated from the cooling of the rest of the cooling water space 7. The cooling water supply into the cooling water inlet 22 and within it is indicated by flow arrows in FIG.

Der Kühlwasserraum des Zylinderkopfes wird durch einen Hauptwasser- und einen von diesem getrennten Zusatzwasserkern hergestellt. Der Hauptwasserkern bildet den sich zwischen den Gaswechselkanälen bzw. Kammern erstreckenden Hauptwasserraum mit den Einlaßöffnungen und der davon getrennte Zusatzwasserkern bildet den Kühlwasserzulauf aus. Der Zusatzwasserkern ist als Kernleiste gestaltet, die im Kokillenunterteil eingelegt wird. Die Kühlwasserbohrung wird nach dem Gießen durch Bohren eingebracht. Es ist selbstverständlich möglich, den Wasserdurchsatz durch die Kühlwasserbohrung durch den Querschnitt des Kühlwasserzulaufs im Zylinderkopfboden zu steuern. Ferner ist durch das Gießen ein Ausnutzen des Kühlwasserzulaufs als

Figure imgb0001
kleiner Kühlwasserraum" möglich. Desweiteren ermöglicht das Gießen eine individuelle Gestaltung des Kühlwasserzulaufs und dadurch eine Beeinflussung der partiell gewünschten Kühlwassermenge.The cooling water chamber of the cylinder head is produced by a main water core and a separate additional water core. The main water core forms the main water space, which extends between the gas exchange channels or chambers, with the inlet openings and the separate additional water core forms the cooling water inlet. The additional water core is designed as a core strip, which is inserted in the lower part of the mold. The cooling water hole is drilled after casting. It is of course possible to control the water throughput through the cooling water hole through the cross section of the cooling water inlet in the cylinder head base. Furthermore, by casting, the cooling water inlet is used as
Figure imgb0001
small cooling water space "is possible. Furthermore, the casting enables an individual design of the cooling water inlet and thereby influences the partially desired amount of cooling water.

Claims (3)

Flüssigkeitsgekühlter Zylinderkopf für eine mehrzylindrige Brennkraftmaschine mit einem Kühlwasserraum, der sich in Kühlwasserraumabschnitte gliedert, die jeweils einem Brennraum zugeordnet sind und durch die Gaswechselkanäle und mindestens eine Kammer für eine Zündkerze oder eine Einspritzdüse verlaufen und in die in deren Bodenbereich zwischen den Gaswechselkanälen und der Kammer mindestens eine in Querrichtung verlaufende Kühlwasserbohrung mündet, die durch einen Kühlwasserzulauf mit dem Kühlwassermantel des Kurbelgehäuses verbunden ist,
dadurch gekennzeichnet,
daß der Kühlwasserzulauf (22) durch Gießen hergestellt wird.Liquid-cooled cylinder head for a multi-cylinder internal combustion engine with a cooling water chamber, which is divided into cooling water chamber sections, each of which is assigned to a combustion chamber and runs through the gas exchange channels and at least one chamber for a spark plug or an injection nozzle and into the bottom area between the gas exchange channels and the chamber at least a transverse cooling water hole opens, which is connected to the cooling water jacket of the crankcase by a cooling water inlet,
characterized,
that the cooling water inlet (22) is made by casting. Flüssigkeitsgekühlter Zylinderkopf nach
dadurch gekennzeichnet,
daß sich der Kühlwasserzulauf (22) zumindest teilweise entlang der Außenseite von mindestens einem Gaswechselkanal (16) erstreckt.Liquid-cooled cylinder head after
characterized,
that the cooling water inlet (22) extends at least partially along the outside of at least one gas exchange channel (16). Flüssigkeitsgekühlter Zylinderkopf nach
dadurch gekennzeichnet,
daß der Kühlwasserraum (7) durch zwei voneinander getrennte Wasserkerne hergestellt wird.Liquid-cooled cylinder head after
characterized,
that the cooling water chamber (7) is produced by two separate water cores.
EP96115801A 1995-11-15 1996-10-02 Liquid cooled internal combustion engine cylinder head Expired - Lifetime EP0774576B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19542492A DE19542492C1 (en) 1995-11-15 1995-11-15 Liquid-cooled cylinder head for a multi-cylinder internal combustion engine
DE19542492 1995-11-15

Publications (2)

Publication Number Publication Date
EP0774576A1 true EP0774576A1 (en) 1997-05-21
EP0774576B1 EP0774576B1 (en) 2000-02-02

Family

ID=7777470

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96115801A Expired - Lifetime EP0774576B1 (en) 1995-11-15 1996-10-02 Liquid cooled internal combustion engine cylinder head

Country Status (4)

Country Link
US (1) US5720240A (en)
EP (1) EP0774576B1 (en)
DE (2) DE19542492C1 (en)
ES (1) ES2144679T3 (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19914940C1 (en) * 1999-04-01 2000-12-14 Daimler Chrysler Ag Water-cooled cylinder head for multi-cylinder i.c. engine has cooling water line supplying cooling water space provided with flow restriction
DE19937122C1 (en) * 1999-08-06 2000-10-26 Daimler Chrysler Ag Liquid-cooled motor cylinder head has a coolant housing with separate chambers to give structured flows directed at critical zones of the cylinder head
DE19945534C1 (en) * 1999-09-23 2000-11-02 Daimler Chrysler Ag Liquid-cooled cylinder head for multi-cylinder i.c. engine incorporates cooling chambers supplied with liquid cooling medium and coupled to sunken cooling spaces
US6250290B1 (en) 2000-04-06 2001-06-26 Transportation Design & Manufacturing Co. Cooled LPG fuel rail
DE10328682A1 (en) * 2003-06-26 2005-01-20 Daimlerchrysler Ag Cylinder head for a multi-cylinder, water-cooled reciprocating internal combustion engine
AT501228B1 (en) * 2005-05-03 2006-11-15 Avl List Gmbh Exhaust system for internal combustion engine has first and second exhaust pipes, in whose opening area, uniting first and second exhaust pipes span angle at reference points of inner wall of exhaust pipes
DE102008049527A1 (en) * 2008-09-29 2010-04-01 Deutz Ag Positioning surfaces on a gas exchange duct rake
AT505591B8 (en) * 2008-10-02 2010-04-15 Avl List Gmbh INTERNAL COMBUSTION ENGINE WITH A CYLINDER HEAD
DE102011015930A1 (en) 2011-04-02 2012-10-04 Daimler Ag Device for cooling e.g. cylinder head of internal combustion engine of commercial motor vehicle, has air compressor provided in channel arrangement, which is fluidically connected with another channel arrangement for supplying coolant
US20150176521A1 (en) * 2012-06-18 2015-06-25 Perusahaan Otomobil Nasional Sdn Bhd Method and apparatus for cooling a cylinder head
JP6055322B2 (en) * 2013-01-28 2016-12-27 本田技研工業株式会社 Cooling structure for internal combustion engine and method for manufacturing internal combustion engine having the cooling structure
US8869758B1 (en) 2013-10-09 2014-10-28 Ford Global Technologies, Llc Exhaust valve bridge and cylinder cooling
DE102017211876B3 (en) 2017-07-12 2018-08-16 Bayerische Motoren Werke Aktiengesellschaft Mold and method for producing a component

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2175046A (en) * 1985-05-08 1986-11-19 Audi Ag Fluid-cooled multi-cylinder i.c. engine cylinder head
DE3710630A1 (en) * 1987-03-31 1988-07-07 Audi Ag Liquid-cooled cylinder head
FR2655381A1 (en) * 1989-12-06 1991-06-07 Peugeot Cylinder head for an internal combustion engine, and engine equipped with this cylinder head
DE4100459A1 (en) * 1990-02-13 1991-08-14 Avl Verbrennungskraft Messtech Cylinder head for IC engine - has internal passageways for circulation of cooling liquid
DE4311648A1 (en) * 1993-04-08 1994-10-13 Bayerische Motoren Werke Ag Multipart cross-flow cylinder head, manufacturable by the die casting method, for liquid-cooled internal combustion engines

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3819655C1 (en) * 1988-06-09 1989-01-26 Daimler-Benz Ag, 7000 Stuttgart, De
DE4116943C2 (en) * 1991-05-24 1997-05-22 Daimler Benz Ag Liquid-cooled four-valve cylinder head for a multi-cylinder internal combustion engine
FR2683263A1 (en) * 1991-10-31 1993-05-07 Smh Management Services Ag INTERNAL COMBUSTION ENGINE WITH IMPROVED COOLING CIRCUIT.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2175046A (en) * 1985-05-08 1986-11-19 Audi Ag Fluid-cooled multi-cylinder i.c. engine cylinder head
DE3710630A1 (en) * 1987-03-31 1988-07-07 Audi Ag Liquid-cooled cylinder head
FR2655381A1 (en) * 1989-12-06 1991-06-07 Peugeot Cylinder head for an internal combustion engine, and engine equipped with this cylinder head
DE4100459A1 (en) * 1990-02-13 1991-08-14 Avl Verbrennungskraft Messtech Cylinder head for IC engine - has internal passageways for circulation of cooling liquid
DE4311648A1 (en) * 1993-04-08 1994-10-13 Bayerische Motoren Werke Ag Multipart cross-flow cylinder head, manufacturable by the die casting method, for liquid-cooled internal combustion engines

Also Published As

Publication number Publication date
EP0774576B1 (en) 2000-02-02
DE19542492C1 (en) 1997-01-16
DE59604364D1 (en) 2000-03-09
US5720240A (en) 1998-02-24
ES2144679T3 (en) 2000-06-16

Similar Documents

Publication Publication Date Title
DE3516453C2 (en)
DE2417925C2 (en) Liquid-cooled multi-cylinder internal combustion engine
EP1815122B1 (en) Piston for an internal combustion engine and combination of a piston provided with an oil injection device
DE112010001720B4 (en) Coolant channel arrangement for a cylinder head of an internal combustion engine
EP1884647B1 (en) Liquid-cooled cylinder head for a combustion engine
EP0774576A1 (en) Liquid cooled internal combustion engine cylinder head
EP1510681A1 (en) Cylinder head gasket
EP1573190B1 (en) Cylinder head of an internal combustion engine having a camshaft bearing rail
DE19542494C1 (en) Liquid-cooled cylinder head for a multi-cylinder internal combustion engine
DE102005048674B4 (en) Cooling water channel structure for an internal combustion engine
EP2195520A1 (en) Cylinder crank case for an internal combustion engine
DE3543443C2 (en)
AT402325B (en) CYLINDER HEAD OF A LIQUID-COOLED INTERNAL COMBUSTION ENGINE WITH SERIES OF CYLINDERS
DE2502631A1 (en) HOUSING FOR A COOLED ONE-PIECE VALVE IN COMBUSTION MACHINERY
DE3802886A1 (en) Cylinder head for water-cooled internal combustion engines
DE10048582B4 (en) Liquid cooled cylinder head for an internal combustion engine
DE19959951A1 (en) Otto engine with direct fuel injection has fuel injection valve with seal, cooled by coolant water coming from outlet in cylinder seal
EP0819837B1 (en) Cooling circuit of an internal combustion engine
AT515220B1 (en) Cylinder block of an internal combustion engine in monoblock construction and casting mold for its production
DE19542495C1 (en) Cast cylinder head of a multi-cylinder internal combustion engine
DE102006026131B4 (en) Method for producing a cylinder head for a liquid-cooled internal combustion engine
WO2005088111A1 (en) Water-cooled cylinder head for an internal combustion engine
DE10026376B4 (en) Liquid cooled cylinder head for an internal combustion engine
DE29723356U1 (en) Cooling circuit for an internal combustion engine
DE19937122C1 (en) Liquid-cooled motor cylinder head has a coolant housing with separate chambers to give structured flows directed at critical zones of the cylinder head

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19970303

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE ES FR GB IT

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: DAIMLER-BENZ AKTIENGESELLSCHAFT

17Q First examination report despatched

Effective date: 19980210

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: DAIMLERCHRYSLER AG

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

ITF It: translation for a ep patent filed

Owner name: BARZANO' E ZANARDO ROMA S.P.A.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE ES FR GB IT

REF Corresponds to:

Ref document number: 59604364

Country of ref document: DE

Date of ref document: 20000309

ET Fr: translation filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20000321

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2144679

Country of ref document: ES

Kind code of ref document: T3

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20030929

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20031009

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20031010

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20031020

Year of fee payment: 8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20041002

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20041004

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050503

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20041002

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050630

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20051002

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20041004