DE4031083C1 - IC engine cylinder head - incorporates valve seats cooled by heat pipes extending into coolant channels - Google Patents
IC engine cylinder head - incorporates valve seats cooled by heat pipes extending into coolant channelsInfo
- Publication number
- DE4031083C1 DE4031083C1 DE19904031083 DE4031083A DE4031083C1 DE 4031083 C1 DE4031083 C1 DE 4031083C1 DE 19904031083 DE19904031083 DE 19904031083 DE 4031083 A DE4031083 A DE 4031083A DE 4031083 C1 DE4031083 C1 DE 4031083C1
- Authority
- DE
- Germany
- Prior art keywords
- cylinder head
- valve seat
- seat ring
- tube
- ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
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
- F02F1/38—Cylinder heads having cooling means for liquid cooling the cylinder heads being of overhead valve type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
- F01L3/12—Cooling of valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
- F01L3/22—Valve-seats not provided for in preceding subgroups of this group; Fixing of valve-seats
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/24—Cylinder heads
- F02F2001/244—Arrangement of valve stems in cylinder heads
- F02F2001/247—Arrangement of valve stems in cylinder heads the valve stems being orientated in parallel with the cylinder axis
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
Description
Die Erfindung betrifft einen Zylinderkopf einer Brennkraftma schine gemäß dem Oberbegriff des Patentanspruchs 1, wie er aus der DE-OS 22 42 947 als bekannt hervorgeht.The invention relates to a cylinder head of an internal combustion engine machine according to the preamble of claim 1 as it from the DE-OS 22 42 947 emerges as known.
Der gattungsgemäß zugrundegelegte Zylinderkopf weist im Bereich des Ventilsitzes ein Wärmerohr auf, das die Form einer ring förmigen Schleife, die die Verdampferzone bildet, auf, wobei das Zulaufende und das ablaufende Ende, die die Kondensations zone bilden, parallel zueinander ausgerichtet sind. Das Wärme rohr ist im Zylinderkopf eingegossen, wobei die die Kondensa tionszone bildenden radial wegverlaufenden Enden in die Umge bungsluft oder in das Kühlwasser des Zylinderkopfes hineinra gen. Im Bereich des Übergangs der Schleife in die parallelen Enden des Wärmerohres ist der Ventilsitz mit diesem Wärmerohr jedoch nur gering gekühlt, so daß über den Umfang des Ventil sitzes keine gleichmäßige Temperatur gegeben und die Dichtwir kung des Ventilsitzes beeinträchtigt ist. Ferner ist das Wär merohr in Herstellung und Betrieb von relativ hohen Ausfalls raten bedroht und kann bei der bekannten Anwendung bei einer Beschädigung nur mit dem gesamten Zylinderkopf gewechselt wer den.The cylinder head used as a basis points in the area The valve seat has a heat pipe that is shaped like a ring shaped loop that forms the evaporator zone, where the inlet end and the outlet end, which are the condensation zone, are aligned parallel to each other. That warmth Pipe is cast in the cylinder head, the condensate tion zone forming radially extending ends in the reverse air or into the cooling water of the cylinder head gen. In the area of the transition from the loop to the parallel The ends of the heat pipe is the valve seat with this heat pipe however, only slightly cooled, so that over the circumference of the valve there is no constant temperature and the seal is kung of the valve seat is impaired. Furthermore, the heat More in the manufacture and operation of relatively high failures advise threatened and can in the known application at a Damage can only be changed with the entire cylinder head the.
Der Erfindung liegt die Aufgabe zugrunde, einen Zylinderkopf dahingehend weiterzuentwickeln, daß eine gleichmäßige Kühlung des Ventilsitzes gewährleistet, und eine einfache und preisgünstige Reparatur der Ventilsitzkühlung mög lich ist.The invention is based on the object to develop a cylinder head so that a ensures uniform cooling of the valve seat, and a simple and inexpensive repair of the valve seat cooling possible is.
Diese Aufgabe wird bei einer gattungsgemäßen Einrichtung mit den kennzeichnenden Merk malen des Patentanspruchs 1 gelöst.This task is carried out in a generic device with the characteristic note paint the claim 1 solved.
Durch den die Verdampferzone bildenden Hohlraum des Ventilsitzringes, der das Ventil vollstän dig umschließt und konzentrisch dazu angeordnet und entlang seines gesamten Umfangs hohl ist, weist der Ventilsitz an jeder Stelle nahezu die gleiche Temperatur auf, wodurch keine auf thermische Verzüge zurückgehenden Undichtheiten auftreten. Fer ner muß bei einer Beschädigung des Wärmerohres nur der Ventil sitzring ausgewechselt werden, wobei die die Kondensationszone bildenden Rohre, die zur Einsteckrichtung des Ventilsitzringes achsparallel ausgerichtet sind, ein falsches Einsetzen unter binden. Weitere sinnvolle Weiterbildungen sind den Unteran sprüchen entnehmbar. Im übrigen wird die Erfindung anhand eines in den Zeichnungen dargestellten Ausführungsbeispieles im fol genden erläutert. Dabei zeigt:Through the cavity of the valve seat ring which forms the evaporator zone and which completes the valve dig encloses and arranged concentrically to and along is hollow throughout its circumference, the valve seat faces each Set up almost the same temperature, which means none thermal delays and leaks occur. Fer ner only has to damage the heat pipe the valve seat ring to be replaced, the condensation zone forming tubes leading to the direction of insertion of the valve seat ring aligned parallel to the axis, incorrect insertion under tie. The Unteran are further useful training courses sayings removable. Otherwise, the invention is based on a embodiment shown in the drawings in fol explained. It shows:
Fig. 1 einen Ausschnitt eines Zylinderkopfes mit einge setztem Ventilsitzring, Fig. 1 shows a section of a cylinder head with inserted setztem valve seat ring,
Fig. 2 den Ventilsitzring nach Fig. 1 in Aufsicht, und Fig. 2, the valve seat ring of FIG. 1 in supervision, and
Fig. 3 den Ventilsitzring im Schnitt entlang der Linie III-III. Fig. 3 shows the valve seat ring in section along the line III-III.
In Fig. 1 ist ein Ausschnitt eines Zylinderkopfes 1 einer Brenn kraftmaschine im Bereich des Auslaßventiles 6, das thermisch besonders beansprucht ist, dargestellt. Innerhalb des Zylinder kopfes 1 sind mehrere Kühlmittelkanäle 4, 4′, 4′′ angeordnet. Ferner ist im Zylinderkopf 1 auch eine den Ventilschaft 2 füh rende und in den Auslaßkanal 13 hineinragende Ventilführungshülse 3 angeordnet. Der Ventilteller des Auslaßven tiles 6 liegt am Ventilsitz 5 an, der Teil eines auswechselbar im Zylinderkopf 1 angeordneten Ventilsitzringes 8 ist. Im In nern ist der Ventilsitzring 8 vollständig und ununterbrochen hohl ausgebildet. Dieser Hohlraum ist die Verdampferzone 7 ei nes Wärmerohres. Im kalten Zustand ist die Verdampferzone 7 mit der Verdampferflüssigkeit 14 gefüllt. Von der dem Zylinderkopf 1 zugewandten Stirnseite des Ventilsitzringes 8 ragen achspa rallel zu der Rotationsachse des Ventilsitzringes 8 ausgerich tete Rohre 9 ab. Diese in ihrem Innern hohle und die Kondensa tionszone bildenden Rohre 9 sind dichtend durch eine Bohrung in der Wandung des Kühlmittelkanals 4 hindurchgeführt und flui disch mit der Verdampferzone 7 des Ventilsitzringes 8 verbun den. An ihrem ventilsitzringseitigen Endbereich weisen die Rohre 9 einen Bereich mit erhöhtem Außendurchmesser auf, in dem eine Umfangsnut mit darin angeordneter Rundschnur-Dichtring 12 ange ordnet ist. Die andere Seite des Rohres 9 ist in einer der Ein steckbohrung gegenüberliegenden Paßbohrung eingesteckt, um mög liche Belastungen durch Vibrationen zu senken. Ferner ist da durch nahezu das gesamte Rohr 9 im Kühlmittelkanal 4 angeord net.In Fig. 1 a section of a cylinder head 1 of an internal combustion engine in the region of the exhaust valve 6 , which is particularly thermally stressed, is shown. Within the cylinder head 1 , several coolant channels 4 , 4 ', 4 ''are arranged. Furthermore, in the cylinder head 1 also a valve stem 2 leading and protruding into the outlet channel 13 valve guide sleeve 3 is arranged. The valve plate of the Auslaßven tiles 6 rests on the valve seat 5 , which is part of a replaceable valve seat ring 8 arranged in the cylinder head 1 . In the interior of the valve seat ring 8 is completely and continuously hollow. This cavity is the evaporator zone 7 egg nes heat pipe. In the cold state, the evaporator zone 7 is filled with the evaporator liquid 14 . From the cylinder head 1 facing end of the valve seat ring 8 project axially parallel to the axis of rotation of the valve seat ring 8 aligned pipes 9 . This inside them hollow and the condensation zone forming tubes 9 are sealingly passed through a hole in the wall of the coolant channel 4 and flui table with the evaporator zone 7 of the valve seat ring 8 the verbun. At their valve seat ring end region, the tubes 9 have an area with an increased outside diameter in which a circumferential groove with a round cord sealing ring 12 arranged therein is arranged. The other side of the tube 9 is inserted into a fitting hole opposite the insertion hole in order to reduce possible loads caused by vibrations. Furthermore, there is net through almost the entire tube 9 in the coolant channel 4 .
Um die Kühlwirkung bzw. die Kondensationszone 10 des Wärmerohres zu erhöhen, ist es, wie in den Fig. 2 und 3 dargestellt, sinnvoll, an der zylinderkopfseitigen Stirnseite des Ventilsitzringes 8 mehrere parallele Rohre 9, deren jeweilige Längsachse parallel zu der Einsteckrichtung des Ventilsitzringes 8 in den Zylin derkopf 1 liegt, auf einem maximal 180° umfassenden Abschnitt eines zum Ventilsitzring 8 konzentrischen Teilkreises anzuord nen, der dem gekrümmten Abgaskanal 13 gegenüberliegt.In order to increase the cooling effect or the condensation zone 10 of the heat pipe, it is sensible, as shown in FIGS. 2 and 3, on the cylinder head end side of the valve seat ring 8, a plurality of parallel tubes 9 , the respective longitudinal axes of which are parallel to the direction of insertion of the valve seat ring 8 in the Zylin derkopf 1 is to arrange on a maximum of 180 ° section of a concentric to the valve seat ring 8 pitch circle which is opposite the curved exhaust duct 13 .
Im Betriebszustand der Brennkraftmaschine fließt Wärme aus dem heißen Ventilteller und des den Ventilsitzring 8 umgebenden Bereiches des Zylinderkopfes 1 in den Ventilsitzring 8 ab, wobei in dessen Innern die Verdampfungsflüssigkeit 14 verdampft. Diese Verdampfung ist mit einer Kühlung des Ventilsitzringes 8 verbunden, da der Dampf nun eine latente Wärme speichert. Diese latente Wärme wird von dem Dampf, der in die Kondensationszone 10 gelangt, an das Kühlmittel des Kühlmittelkanales 4 abgege ben, wobei der Dampf wieder zu Flüssigkeit kondensiert. Diese Flüssigkeit wird durch Schwerkrafteinfluß und/oder durch ka pillarwirksamen Innenoberflächen zur Kondensationszone 10 in Richtung der Verdampferzone 7 transportiert und der Kreislauf geschlossen.In the operating state of the internal combustion engine, heat flows from the hot valve disc and the valve seat ring 8 surrounding area of the cylinder head 1 into the valve seat ring 8 from, said evaporating the evaporative liquid 14 in the interior thereof. This evaporation is associated with cooling of the valve seat ring 8 , since the steam now stores latent heat. This latent heat is given off by the steam entering the condensation zone 10 to the coolant of the coolant channel 4 , the steam again condensing to liquid. This liquid is transported to the condensation zone 10 in the direction of the evaporator zone 7 by the influence of gravity and / or by pillar-effective inner surfaces and the circuit is closed.
Claims (7)
- a) die Verdampferzone (7) ist als axial an der Stelle des Ven tilsitzes (5) einsetzbarer Ventilsitzring (8) ausgebildet, der entlang des gesamten Umfanges hohl ist;
- b) an dem Ventilsitzring (8) ist wenigstens ein zu der Ein steckrichtung des Ventilsitzringes (8) achsparallel ausge richtetes, die Kondensationszone (10) bildendes und nach außen abgeschlossenes Rohr (9, 9′, 9′′, 9′′′) angeordnet, dessen Hohlraum frei mit dem Hohlraum des Ventilsitzringes (8) fluidisch verbunden ist und
- c) das Rohr (9, 9′, 9′′, 9′′′) ist dichtend durch eine Einsteck bohrung einer Kühlkanalwandung des Zylinderkopfes (1) hin durchgesteckt und ragt in den Kühlmittelkanal (4, 4′, 4′′) hinein.
- a) the evaporator zone ( 7 ) is designed as an axially at the location of the Ven valve seat ( 5 ) insertable valve seat ring ( 8 ) which is hollow along the entire circumference;
- b) on the valve seat ring ( 8 ) is at least one to the insertion direction of the valve seat ring ( 8 ) axially parallel, the condensation zone ( 10 ) forming and sealed to the outside tube ( 9 , 9 ', 9 '', 9 ''') arranged, the cavity of which is fluidly connected to the cavity of the valve seat ring ( 8 ) and
- c) the tube ( 9 , 9 ', 9 '', 9 ''') is inserted sealingly through an insertion bore of a cooling channel wall of the cylinder head ( 1 ) and protrudes into the coolant channel ( 4 , 4 ', 4 '') .
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19904031083 DE4031083C1 (en) | 1990-10-02 | 1990-10-02 | IC engine cylinder head - incorporates valve seats cooled by heat pipes extending into coolant channels |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19904031083 DE4031083C1 (en) | 1990-10-02 | 1990-10-02 | IC engine cylinder head - incorporates valve seats cooled by heat pipes extending into coolant channels |
Publications (1)
Publication Number | Publication Date |
---|---|
DE4031083C1 true DE4031083C1 (en) | 1991-08-22 |
Family
ID=6415394
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19904031083 Expired - Fee Related DE4031083C1 (en) | 1990-10-02 | 1990-10-02 | IC engine cylinder head - incorporates valve seats cooled by heat pipes extending into coolant channels |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE4031083C1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10231381A1 (en) * | 2002-07-11 | 2004-01-22 | Daimlerchrysler Ag | Cooling device for inlet valves and/or exhaust valves of internal combustion engine has weir located in oil chamber of engine's cylinder head, forming oil reservoir which encompasses valve stem seal |
DE102008050388B3 (en) * | 2008-10-02 | 2009-10-22 | Märkisches Werk GmbH | Method for repairing damage of a water-cooled cylinder head in 4-stroke internal combustion engines, and cylinder head |
CN101598077B (en) * | 2009-06-12 | 2011-04-20 | 扬州扬子江宝云缸套有限公司 | Combined cylinder head used for engine with function of improving exhaust gap bridge cooling efficiency |
DE10314906B4 (en) * | 2002-04-04 | 2013-09-19 | Avl List Gmbh | Cylinder head of an internal combustion engine |
DE102004034443B4 (en) * | 2003-08-06 | 2014-04-30 | General Motors Corp. (N.D.Ges.D. Staates Delaware) | Cooling system for an internal combustion engine and method for controlling such a cooling system |
CN104040122A (en) * | 2012-01-18 | 2014-09-10 | 瓦锡兰芬兰有限公司 | Cooling arrangement for valve seat |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2242947A1 (en) * | 1972-08-31 | 1974-03-14 | Volkswagenwerk Ag | DEVICE FOR COOLING HIGHLY THERMAL DEMANDS ON COMBUSTION ENGINES |
-
1990
- 1990-10-02 DE DE19904031083 patent/DE4031083C1/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2242947A1 (en) * | 1972-08-31 | 1974-03-14 | Volkswagenwerk Ag | DEVICE FOR COOLING HIGHLY THERMAL DEMANDS ON COMBUSTION ENGINES |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10314906B4 (en) * | 2002-04-04 | 2013-09-19 | Avl List Gmbh | Cylinder head of an internal combustion engine |
DE10231381A1 (en) * | 2002-07-11 | 2004-01-22 | Daimlerchrysler Ag | Cooling device for inlet valves and/or exhaust valves of internal combustion engine has weir located in oil chamber of engine's cylinder head, forming oil reservoir which encompasses valve stem seal |
DE102004034443B4 (en) * | 2003-08-06 | 2014-04-30 | General Motors Corp. (N.D.Ges.D. Staates Delaware) | Cooling system for an internal combustion engine and method for controlling such a cooling system |
DE102008050388B3 (en) * | 2008-10-02 | 2009-10-22 | Märkisches Werk GmbH | Method for repairing damage of a water-cooled cylinder head in 4-stroke internal combustion engines, and cylinder head |
CN101598077B (en) * | 2009-06-12 | 2011-04-20 | 扬州扬子江宝云缸套有限公司 | Combined cylinder head used for engine with function of improving exhaust gap bridge cooling efficiency |
CN104040122A (en) * | 2012-01-18 | 2014-09-10 | 瓦锡兰芬兰有限公司 | Cooling arrangement for valve seat |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8100 | Publication of the examined application without publication of unexamined application | ||
D1 | Grant (no unexamined application published) patent law 81 | ||
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |