EP1063408B1 - Cylinder head - Google Patents
Cylinder head Download PDFInfo
- Publication number
- EP1063408B1 EP1063408B1 EP00113234A EP00113234A EP1063408B1 EP 1063408 B1 EP1063408 B1 EP 1063408B1 EP 00113234 A EP00113234 A EP 00113234A EP 00113234 A EP00113234 A EP 00113234A EP 1063408 B1 EP1063408 B1 EP 1063408B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- spark plug
- cylinder head
- plug seat
- sleeve
- diameter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000002485 combustion reaction Methods 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims 2
- 238000007789 sealing Methods 0.000 claims 2
- 239000000565 sealant Substances 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000002826 coolant Substances 0.000 description 4
- 241000209035 Ilex Species 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000036316 preload Effects 0.000 description 2
- 101100008049 Caenorhabditis elegans cut-5 gene Proteins 0.000 description 1
- 208000032544 Cicatrix Diseases 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000009419 refurbishment Methods 0.000 description 1
- 231100000241 scar Toxicity 0.000 description 1
- 230000037387 scars Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
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
- F02F1/38—Cylinder heads having cooling means for liquid cooling the cylinder heads being of overhead valve type
-
- 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
- F02F1/42—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
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B1/00—Engines characterised by fuel-air mixture compression
- F02B1/02—Engines characterised by fuel-air mixture compression with positive ignition
- F02B1/04—Engines characterised by fuel-air mixture compression with positive ignition with fuel-air mixture admission into cylinder
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
- F02B2275/18—DOHC [Double overhead camshaft]
-
- 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 cutting device for sheets with at least
- the invention relates to a cylinder head of an internal combustion engine according to the preamble of claim 1.
- Such generic cylinder heads are in the prior art For example, from DE 36 01 274 C2, where a cylinder head with several integrally molded spark plug tubes for receiving of spark plugs is described.
- the cylinder head of internal combustion engines seals the working space from the cylinder and transfers part of it during combustion resulting heat energy to the circulating in the cylinder head Coolant, so as to limit the component temperatures in total.
- the cylinder head becomes mechanical due to preload and gas forces claimed and thermally stressed by the combustion.
- the Preload forces of the cylinder head stir with the screw connection the cylinder block, while the gas forces through the combustion caused in the combustion chamber, which therefore also for the thermal Heating the components are responsible.
- the cylinder head is also crucial for the gas exchange of Responsible for combustion and takes the inlet and Exhaust valves and gasoline engines or gas-powered Diesel engines on the spark plug of each cylinder.
- valves each out a valve head and a valve stem, lie sealingly a valve seat, which is incorporated or inserted into the cylinder head is. Downstream of the valve head are the respective inlet or exhaust ports of the engine.
- valves To prevent leaks in the valve seat caused by one-sided wear reinforced valve areas arise, prevent, are often rotatable on engines of known types, the valves arranged so that they make a small rotational movement with each stroke, which usually occurs when opening the valve.
- valves do not seal one hundred percent, because, for example, the Valve center axis as a result of existing manufacturing or assembly inaccuracies lies outside the center axis of the valve seat ring, So an offset exists or the valve seat is damaged.
- valve seats in the cylinder head For larger wear or damage such as scars or impact points is a regrinding or milling of the valve seats in the cylinder head required. In extreme cases, the valve and the valve seat ring be replaced. This is not only costly, but also elaborate.
- the spark plug tube is a receiving opening for the spark plug of the engine and is thus on each cylinder head necessary, in which a spark plug is present.
- the spark plug tube may consist of a deviating from the cylinder head material, However, it is usually directly in the production of the cylinder head incorporated in the form of a hole or recess in this. It allows the inclusion of the spark plugs or their Accessibility, which is why it also has an opening on one side got to.
- valve seat rings are characterized by the structurally tight Distances between the valves inevitably in the immediate vicinity arranged the thread of the spark plug.
- the individual modules are proportional and have no delay on. They are therefore one hundred percent true to size.
- the valve seat rings deform unevenly and thus forms the cause of so-called "cold stall effect”.
- valves are leaking, the problem of deposits in the Area of leaks to accelerated wear of the Valves and also the valve seat ring leads. Although equalized called effect with uniform heating, so with longer term the engine again, but in the cold start phase occurring increased signs of wear in the valve seat area Overall lead to premature failure of the engine.
- the invention is based on the technical problem, a Cylinder head to develop in which an uneven deformation the valve seat rings is largely avoided.
- a should Procedures are provided that the manufacture of such Cylinder head allows.
- a cylinder head of an internal combustion engine with at least one Spark plug tube (1) per cylinder wherein the spark plug tube a the Combustion chamber of the engine facing end region with a Connecting thread (6) for screwing a spark plug in the Cylinder head (3) and an adjoining to the engine outside opened area with extended diameter (d) has to perform the spark plug tube so that it is transverse to its longitudinal direction is severed.
- a Insert sleeve in the spark plug tube and this sleeve by means of a Permanently elastic sealant in the spark plug tube to attach The permanently elastic sealant allows expansion the cylinder head and the spark plug tube to a limited extent, without the components influencing each other.
- the permanently elastic Sealant for example, on a thermal durable silicone base can be made, thus serves a Compensation of the different deformations of the respective cylinder head areas due to their different thermal expansions.
- the sleeve seals in conjunction with the permanently elastic Seal the severed spark plug tube against leaks from Coolant from, provided at the passage of achenkeitssortder Cavity of the engine block is touched.
- the invention proposes to equip the sleeve with a length, which corresponds to the length of the spark plug tube, so that the Diameter difference is compensated again and therefore no Cross-section reduction in this sensitive area of the cylinder head occurs, possibly causing a destruction of the cylinder head could lead.
- the inventive method consists in the following Process steps. Thereafter, first, the inner diameter of the spark plug tube by a material removing process extended to a diameter larger than the outer diameter the sleeve is. As a material-removing process can machining methods are used, as they are known per se. Subsequently, the spark plug tube is transverse to its longitudinal direction severed what the use of the sleeve in the spark plug tube connects, with the sleeve with the permanently elastic sealant is provided. This permanently elastic sealant also has the Advantage that the tightness of the cylinder head still guaranteed remains, that is, no coolant can escape.
- the inventive method and a cylinder head according to the presented solution can be easily incorporated into the manufacturing cycles of motor vehicles without major changes in the Production processes are necessary.
- the retrofit is old Cylinder heads possible.
- the central bore with the diameter "d” is the spark plug tube 1 before its extension.
- a thread 6 for fastening the Spark plug introduced in the lower section of the spark plug tube 1, ie in its bottom area.
- the spark plug was in the figures of better clarity not shown.
- the sleeve 2 can be inserted into the spark plug tube become. Between sleeve 2 and spark plug tube is also a permanently elastic Introduced sealant.
- the spark plug tube 1 is perpendicular to its longitudinal center axis through a slot 4 divided.
- This slot 4 for example, in the Production of a new cylinder head directly molded or be subsequently introduced by means of a separating tool. He preferably runs circumferentially, but can also only partially be provided.
- the inner diameter of the sleeve 2 was chosen such that the Spark plug can be used by means of a tool and in the Thread can be attached or detached from the thread.
- the cylinder block side is in the figures as the bottom 8 of the cylinder head have been marked while the latter opposite Side is referred to as the top 7.
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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)
- Ignition Installations For Internal Combustion Engines (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
Description
Die Erfindung betrifft eine Schneidvorrichtung für Bleche mit mindestens Die Erfindung betrifft einen Zylinderkopf eines Verbrennungmotors nach dem Oberbegriff des Patentanspruches 1.The invention relates to a cutting device for sheets with at least The invention relates to a cylinder head of an internal combustion engine according to the preamble of claim 1.
Derartige gattungsgemäße Zylinderköpfe sind im Stand der Technik beispielsweise aus der DE 36 01 274 C2 bekannt, wo ein Zylinderkopf mit mehreren einstückig angeformten Zündkerzenrohren zur Aufnahme von Zündkerzen beschrieben ist.Such generic cylinder heads are in the prior art For example, from DE 36 01 274 C2, where a cylinder head with several integrally molded spark plug tubes for receiving of spark plugs is described.
Der Zylinderkopf von Verbrennungsmotoren dichtet den Arbeitsraum des Zylinders ab und überträgt einen Teil der bei der Verbrennung entstehenden Wärmeenergie an das im Zylinderkopf zirkulierende Kühlmittel, um damit die Bauteiltemperaturen insgesamt zu begrenzen.The cylinder head of internal combustion engines seals the working space from the cylinder and transfers part of it during combustion resulting heat energy to the circulating in the cylinder head Coolant, so as to limit the component temperatures in total.
Der Zylinderkopf wird durch Vorspann- und Gaskräfte mechanisch beansprucht und durch die Verbrennung thermisch belastet. Die Vorspannkräfte des Zylinderkopfes rühren von der Verschraubung mit dem Zylinderblock her, während die Gaskräfte durch die Verbrennung im Brennraum verursacht werden, die somit auch für die thermische Aufheizung der Bauteile verantwortlich sind.The cylinder head becomes mechanical due to preload and gas forces claimed and thermally stressed by the combustion. The Preload forces of the cylinder head stir with the screw connection the cylinder block, while the gas forces through the combustion caused in the combustion chamber, which therefore also for the thermal Heating the components are responsible.
Der Zylinderkopf ist zudem maßgeblich für den Gaswechsel des Verbrennungsvorganges verantwortlich und nimmt die Einlass-und Auslassventile sowie bei Benzinmotoren oder bei gasbetriebenen Dieselmotoren die Zündkerze eines jeden Zylinders auf. The cylinder head is also crucial for the gas exchange of Responsible for combustion and takes the inlet and Exhaust valves and gasoline engines or gas-powered Diesel engines on the spark plug of each cylinder.
Hochleistungsmotoren moderner Bauart verfügen heute regelmäßig über mehrere Ein-bzw. Auslassventile. Die Ventile, die jeweils aus einem Ventilkopf und einem Ventilschaft bestehen, liegen dichtend an einem Ventilsitz an, der in den Zylinderkopf eingearbeitet oder eingefügt ist. Dem Ventilkopf nachgeschaltet sind die jeweiligen Einlass- bzw. Auslasskanäle des Motors.Today, high-performance motors of modern design regularly feature over several Ein- and. Exhaust valves. The valves, each out a valve head and a valve stem, lie sealingly a valve seat, which is incorporated or inserted into the cylinder head is. Downstream of the valve head are the respective inlet or exhaust ports of the engine.
Um Undichtheiten des Ventilsitzes, die durch einseitige Abnutzung verstärkt beanspruchter Ventilbereiche entstehen, vorzubeugen, werden an Motoren bekannter Bauarten vielfach die Ventile drehbar angeordnet, sodass sie bei jedem Hub eine kleine Drehbewegung ausführen, die meist beim Öffnen des Ventiles erfolgt.To prevent leaks in the valve seat caused by one-sided wear reinforced valve areas arise, prevent, are often rotatable on engines of known types, the valves arranged so that they make a small rotational movement with each stroke, which usually occurs when opening the valve.
Außerdem kann es aus unterschiedlichen Gründen vorkommen, dass die Ventile nicht hundertprozentig abdichten, weil beispielsweise die Ventilmittenachse infolge vorhandener Fertigungs- oder Montageungenauigkeiten außerhalb der Mittenachse des Ventilsitzringes liegt, also ein Versatz vorhanden oder der Ventilsitz beschädigt ist.In addition, it may happen for different reasons that the valves do not seal one hundred percent, because, for example, the Valve center axis as a result of existing manufacturing or assembly inaccuracies lies outside the center axis of the valve seat ring, So an offset exists or the valve seat is damaged.
Bei größerem Verschleiß oder Schäden wie Narben oder Einschlagstellen ist ein Nachschleifen oder Fräsen der Ventilsitze im Zylinderkopf erforderlich. In Extremfällen müssen das Ventil sowie der Ventilsitzring ausgetauscht werden. Dies ist nicht nur kostenintensiv, sondern auch aufwendig.For larger wear or damage such as scars or impact points is a regrinding or milling of the valve seats in the cylinder head required. In extreme cases, the valve and the valve seat ring be replaced. This is not only costly, but also elaborate.
Ein weiteres Problem ergibt sich für den ordnungsgemäßen Ventilsitz aus der Tatsache heraus, dass heutige Zylinderköpfe von Verbrennungsmotoren zumeist aus Aluminium hergestellt sind. Dieses neigt verstärkt zu ungleichmäßigen Materialausdehnungen, sodass der Zylinderkopf und mit ihm nicht zuletzt die Ventilsitzringe verzogen werden. Dieses Problem stellt sich insbesondere nach einem Kaltstart des Motors. Dabei werden vor allem die brennraumseitigen Partien des Zylinderkopfes thermisch hoch belastet.Another problem arises for the proper valve seat from the fact that today's cylinder heads of internal combustion engines mostly made of aluminum. This tends reinforced to uneven material expansions, so that the Cylinder head and not least with him the valve seat rings warped become. This problem arises in particular after a cold start of the motor. Here are mainly the combustion chamber side games of Cylinder head thermally highly loaded.
Eine weitere der möglichen Ursachen dieser unerwünschten Verformung der Ventilsitzringe ist in dem im Zylinderkopf vorhandenen Zündkerzenrohr zu sehen. Das Zündkerzenrohr ist eine Aufnahmeöffnung für die Zündkerze des Motors und ist somit an jedem Zylinderkopf notwendig, in dem eine Zündkerze vorhanden ist. Das Zündkerzenrohr kann aus einem vom Zylinderkopf abweichenden Material bestehen, wird jedoch zumeist bei der Herstellung des Zylinderkopfes unmittelbar in Form einer Bohrung oder Ausnehmung in diesen eingearbeitet. Es ermöglicht die Aufnahme der Zündkerzen beziehungsweise deren Zugänglichkeit, weshalb es auch einseitig eine Öffnung aufweisen muss.Another of the possible causes of this undesirable deformation the valve seat rings is in the present in the cylinder head spark plug tube to see. The spark plug tube is a receiving opening for the spark plug of the engine and is thus on each cylinder head necessary, in which a spark plug is present. The spark plug tube may consist of a deviating from the cylinder head material, However, it is usually directly in the production of the cylinder head incorporated in the form of a hole or recess in this. It allows the inclusion of the spark plugs or their Accessibility, which is why it also has an opening on one side got to.
Die Ventilsitzringe werden durch die konstruktiv eng bemessenen Abstände der Ventile untereinander zwangsläufig in unmittelbarer Nähe des Gewindes der Zündkerze angeordnet. Im kalten Zustand des Zylinderkopfes sind die einzelnen Baugruppen proportional und weisen keinerlei Verzug auf. Sie sind demnach hundertprozentig maßhaltig. Bei einer Erwärmung nach dem Anlassen des Verbrennungsmotors kommt es zu lokal sehr unterschiedlichen Materialausdehnungen des Zylinderkopfes. Dies führt wiederum dazu, dass sich auch die Ventilsitzringe ungleichmäßig verformen und bildet mithin die Ursache des so genannten "Cold-Stall-Effektes".The valve seat rings are characterized by the structurally tight Distances between the valves inevitably in the immediate vicinity arranged the thread of the spark plug. In the cold state of the Cylinder head, the individual modules are proportional and have no delay on. They are therefore one hundred percent true to size. When heated after starting the internal combustion engine it comes to locally very different material expansions of Cylinder head. This in turn means that the valve seat rings deform unevenly and thus forms the cause of so-called "cold stall effect".
Die Ventile werden undicht, wobei das Problem von Ablagerungen im Bereich der undichten Stellen zu einem beschleunigten Verschleiß der Ventile und auch des Ventilsitzringes führt. Zwar egalisiert sich der genannte Effekt bei gleichmäßiger Erwärmung, also bei längerer Laufzeit des Motors wieder, jedoch können die in der Kaltstartphase auftretenden erhöhten Verschleißerscheinungen im Ventilsitzbereich insgesamt zu einem vorzeitigen Ausfall des Motors führen.The valves are leaking, the problem of deposits in the Area of leaks to accelerated wear of the Valves and also the valve seat ring leads. Although equalized called effect with uniform heating, so with longer term the engine again, but in the cold start phase occurring increased signs of wear in the valve seat area Overall lead to premature failure of the engine.
Der Erfindung liegt die technische Problemstellung zugrunde, einen Zylinderkopf zu entwickeln, bei dem eine ungleichmäßige Verformung der Ventilsitzringe weitestgehend vermieden wird. Außerdem soll ein Verfahren bereitgestellt werden, dass die Herstellung eines solchen Zylinderkopfes ermöglicht.The invention is based on the technical problem, a Cylinder head to develop in which an uneven deformation the valve seat rings is largely avoided. In addition, a should Procedures are provided that the manufacture of such Cylinder head allows.
Zur Lösung der technischen Problemstellung wird vorgeschlagen, an einem Zylinderkopf eines Verbrennungsmotors mit mindestens einem Zündkerzenrohr (1) pro Zylinder, wobei das Zündkerzenrohr einen dem Brennraum des Motors zugewandten Endbereich mit einem Anschlussgewinde (6) zur Verschraubung einer Zündkerze in dem Zylinderkopf (3) und einen sich daran anschließenden zur Motoraußenseite geöffneten Bereich mit erweitertem Durchmesser (d) aufweist, das Zündkerzenrohr derart auszuführen, dass es quer zu seiner Längsrichtung durchtrennt ist.To solve the technical problem is proposed to a cylinder head of an internal combustion engine with at least one Spark plug tube (1) per cylinder, wherein the spark plug tube a the Combustion chamber of the engine facing end region with a Connecting thread (6) for screwing a spark plug in the Cylinder head (3) and an adjoining to the engine outside opened area with extended diameter (d) has to perform the spark plug tube so that it is transverse to its longitudinal direction is severed.
Durch die Durchtrennung quer zur Längsrichtung bleibt die Ausdehnung des Zylinderkopfes ohne Einfluss auf das Zündkerzenrohr, sodass damit auch eine Verformung der Ventilsitze vermieden wird.Through the transection transverse to the longitudinal direction remains the expansion the cylinder head without influence on the spark plug tube, so that also a deformation of the valve seats is avoided.
Mittels dieser vorgestellten Lösung ist es erstmalig möglich, sowohl neue Zylinderköpfe als auch bereits in Betrieb befindliche Motoren mit derartigen Vorrichtungen auszustatten und damit sowohl in der Kaltlaufphase als auch im Warmlauf des Motors einen einwandfreien Betrieb zu gewährleisten. Die Ventilsitze verformen sich nicht mehr, und der Motor verschleißt nunmehr erst in erheblich verlängerten Lebensdauerzyklen. Es wurde hiermit eine sehr kostengünstige Variante der Aufarbeitung alter Motoren und der Verbesserung neuer Motorensysteme ermöglicht.By means of this presented solution, it is possible for the first time, both new cylinder heads as well as already in operation with engines equip such devices and thus both in the cold running phase as well as the warm-up of the engine a flawless To ensure operation. The valve seats no longer deform, and the engine wears now only in considerably prolonged Life cycles. It has become a very cost effective option the refurbishment of old engines and the improvement of new engine systems allows.
Weitere Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche.Further embodiments of the invention are the subject of the dependent claims.
So wird gemäß der vorgestellten Erfindung ferner vorgeschlagen, eine Hülse in das Zündkerzenrohr einzusetzen und diese Hülse mittels einer dauerelastischen Dichtungsmasse in dem Zündkerzenrohr zu befestigen. Die dauerelastische Dichtungsmasse gestattet eine Ausdehnung des Zylinderkopfes und des Zündkerzenrohres in begrenztem Umfang, ohne dass sich die Bauteile gegenseitig beeinflussen. Die dauerelastische Dichtungsmasse, die beispielsweise auf einer thermisch belastbaren Silikonbasis hergestellt werden kann, dient damit einem Ausgleich der unterschiedlichen Verformungen der betreffenden Zylinderkopfbereiche infolge ihrer unterschiedlichen Wärmeausdehnungen. Gleichzeitig dichtet die Hülse in verbindung mit der dauerelastischen Dichtmasse das durchtrennte Zündkerzenrohr gegen Austritte von Kühlflüssigkeit ab, sofern bei der Durchtrennung ein Kühlflüssigkeitsführender Hohlraum des Motorblockes tangiert wird.Thus, it is also proposed according to the invention presented, a Insert sleeve in the spark plug tube and this sleeve by means of a Permanently elastic sealant in the spark plug tube to attach. The permanently elastic sealant allows expansion the cylinder head and the spark plug tube to a limited extent, without the components influencing each other. The permanently elastic Sealant, for example, on a thermal durable silicone base can be made, thus serves a Compensation of the different deformations of the respective cylinder head areas due to their different thermal expansions. At the same time, the sleeve seals in conjunction with the permanently elastic Seal the severed spark plug tube against leaks from Coolant from, provided at the passage of a Kühlflüssigkeitsführender Cavity of the engine block is touched.
Da das Zündkerzenrohr in seinem Querschnitt erweitert werden muss, damit die Hülse darin einsetzbar ist, wird in einer weiteren Ausgestaltung der Erfindung vorgeschlagen, die Hülse mit einer Länge auszustatten, die der Länge des Zündkerzenrohres entspricht, sodass die Durchmesserdifferenz wieder ausgeglichen wird und mithin keine Querschnittsreduzierung in diesem sensiblen Bereich des Zylinderkopfes auftritt, die möglicherweise zu einer Zerstörung des Zylinderkopfes führen könnte.Since the spark plug tube must be extended in its cross section, so that the sleeve is inserted therein is in a further embodiment the invention proposes to equip the sleeve with a length, which corresponds to the length of the spark plug tube, so that the Diameter difference is compensated again and therefore no Cross-section reduction in this sensitive area of the cylinder head occurs, possibly causing a destruction of the cylinder head could lead.
Das erfindungsgemäße Verfahren besteht in den nachfolgend aufgeführten Verfahrensschritten. Danach wird zunächst der Innendurchmesser des Zündkerzenrohres durch ein materialabtragendes Verfahren auf einen Durchmesser erweitert, der größer als der Außendurchmesser der Hülse ist. Als materialabtragendes Verfahren können spanende Verfahren eingesetzt werden, wie sie an sich bekannt sind. Anschließend wird das Zündkerzenrohr quer zu seiner Längsrichtung durchtrennt, woran sich der Einsatz der Hülse in das Zündkerzenrohr anschließt, wobei die Hülse mit der dauerelastischen Dichtungsmasse versehen wird. Diese dauerelastische Dichtungsmasse hat ferner den Vorteil, dass die dichtigkeit des Zylinderkopfes nach wie vor gewährleistet bleibt, das heißt, kein Kühlmittel entweichen kann.The inventive method consists in the following Process steps. Thereafter, first, the inner diameter of the spark plug tube by a material removing process extended to a diameter larger than the outer diameter the sleeve is. As a material-removing process can machining methods are used, as they are known per se. Subsequently, the spark plug tube is transverse to its longitudinal direction severed what the use of the sleeve in the spark plug tube connects, with the sleeve with the permanently elastic sealant is provided. This permanently elastic sealant also has the Advantage that the tightness of the cylinder head still guaranteed remains, that is, no coolant can escape.
Das erfindungsgemäße Verfahren sowie ein Zylinderkopf nach der vorgestellten Lösung lassen sich problemlos in die Herstellungszyklen der Kraftfahrzeuge einfügen, ohne dass größere Änderungen der Produktionsabläufe notwendig sind. Zudem ist die Nachrüstung alter Zylinderköpfe möglich.The inventive method and a cylinder head according to the presented solution can be easily incorporated into the manufacturing cycles of motor vehicles without major changes in the Production processes are necessary. In addition, the retrofit is old Cylinder heads possible.
Ein Ausführungsbeispiel der Erfindung wird nachstehend unter Bezugnahme auf die Zeichnungen näher erläutert. Es zeigt:
- Figur 1
- einen Schnitt durch einen Zylinderkopf ohne eine Hülse,
Figur 2- einen Schnitt durch einen Zylinderkopf mit einer darin eingesetzten Hülse und
Figur 3- einen vergrößerten Ausschnitt des die Hülse aufnehmenden Bereiches.
- FIG. 1
- a section through a cylinder head without a sleeve,
- FIG. 2
- a section through a cylinder head with a sleeve inserted therein and
- FIG. 3
- an enlarged section of the sleeve receiving area.
Anhand der Figuren lässt sich sowohl der Aufbau eines erfindungsgemäßen
Zylinderkopfes als auch die Schrittfolge zur Herstellung eines
derartigen Zylinderkopfes anschaulich erläutern. In dem Zylinderkopf 3
sind mehrere Ausnehmungen 5 eingelassen, die einerseits einer
Gewichtsreduzierung und andererseits dem Transport des darin zirkulierenden
Kühlmittels dienen.On the basis of the figures, both the structure of an inventive
Cylinder head as well as the sequence of steps for producing a
Illustrate such cylinder head vividly. In the
Die zentrale Bohrung mit dem Durchmesser "d" ist das Zündkerzenrohr 1 vor seiner Erweiterung. Im unteren Abschnitt des Zündkerzenrohres 1, also in seinem Bodenbereich, ist ein Gewinde 6 zur Befestigung der Zündkerze eingebracht. Die Zündkerze wurde in den Figuren der besseren Übersichtlichkeit halber nicht dargestellt. Durch ein spanabhebendes Verfahren wird das Zündkerzenrohr 1 auf den Durchmesser "D" erweitert.The central bore with the diameter "d" is the spark plug tube 1 before its extension. In the lower section of the spark plug tube 1, ie in its bottom area, is a thread 6 for fastening the Spark plug introduced. The spark plug was in the figures of better clarity not shown. By a metal-cutting Procedure, the spark plug tube 1 to the diameter "D" extended.
Anschließend kann die Hülse 2 in das Zündkerzenrohr eingesetzt
werden. Zwischen Hülse 2 und Zündkerzenrohr ist zudem eine dauerelastische
Dichtungsmasse eingebracht.Subsequently, the
Das Zündkerzenrohr 1 ist senkrecht zu seiner Längsmittenachse durch
einen Schlitz 4 geteilt. Dieser Schlitz 4 kann beispielsweise bei der
Herstellung eines neuen Zylinderkopfes unmittelbar eingeformt oder
nachträglich mittels eines Trennwerkzeuges eingebracht werden. Er
verläuft vorzugsweise umlaufend, kann jedoch ebenso nur abschnittsweise
vorgesehen sein. The spark plug tube 1 is perpendicular to its longitudinal center axis through
a
Der Innnendurchmesser der Hülse 2 wurde derart gewählt, dass die
Zündkerze mittels eines Werkzeuges einsetzbar ist und in dem
Gewinde befestigt bzw. aus dem Gewinde gelöst werden kann.The inner diameter of the
Die Zylinderblockseite ist in den Figuren als Unterseite 8 des Zylinderkopfes
gekennzeichnet worden, während die dieser gegenüberliegende
Seite als Oberseite 7 bezeichnet ist. The cylinder block side is in the figures as the
- 11
- Zündkerzenrohrplug tube
- 22
- Hülseshell
- 33
- Zylinderkopfcylinder head
- 44
- Schnittcut
- 55
- Ausnehmungenrecesses
- 66
- ZündkerzenanschlussgewindeSpark connecting thread
- 77
- Oberseite des ZylinderkopfesTop of the cylinder head
- 88th
- Anlagefläche am MotorblockContact surface on the engine block
- dd
- Durchmesser des ZündkerzenrohresDiameter of the spark plug tube
- DD
- erweiterter Durchmesser des Zündkerzenrohresextended diameter of the spark plug tube
Claims (4)
- Cylinder head of an internal combustion engine with at least one spark plug seat (1) per cylinder, the spark plug seat having an end region with a connector thread (6) directed towards the combustion chamber of the engine for screwing a spark plug in the cylinder head (3) and an adjoining region with a widened diameter (d) open towards the engine external face, characterised in that the spark plug seat (1) is split in at least certain portions in the region of the widened diameter (d) by a slot provided in the wall of the spark plug seat transversely to its longitudinal direction.
- Cylinder head of an internal combustion engine as claimed in claim 1, characterised in that a sleeve (2) is placed in the spark plug seat (1) and fixed in the spark plug seat (1) by means of a permanently elastic sealing compound.
- Cylinder head of an internal combustion engine as claimed in one of the preceding claims, characterised in that the sleeve (2) is of a length more or less corresponding to that of the spark plug seat (1).
- Method of producing a cylinder head as claimed in one of the preceding claims, characterised in that the internal diameter (d) of the spark plug seat (1) is firstly widened to a diameter (D) that is bigger than the external diameter of the sleeve (2) by a process involving the removal of material, after which the spark plug seat (1) is split transversely to its longitudinal direction in at least certain portions by means of a slot and finally the sleeve (2) wetted with the permanently elastic sealing compound is inserted in the spark plug seat (1) and adjusted therein.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19928838 | 1999-06-24 | ||
| DE19928838A DE19928838C1 (en) | 1999-06-24 | 1999-06-24 | Cylinder head |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1063408A2 EP1063408A2 (en) | 2000-12-27 |
| EP1063408A3 EP1063408A3 (en) | 2001-11-28 |
| EP1063408B1 true EP1063408B1 (en) | 2005-12-07 |
Family
ID=7912308
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00113234A Expired - Lifetime EP1063408B1 (en) | 1999-06-24 | 2000-06-21 | Cylinder head |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US6675760B1 (en) |
| EP (1) | EP1063408B1 (en) |
| AT (1) | ATE312281T1 (en) |
| DE (2) | DE19928838C1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006009783A (en) * | 2004-05-21 | 2006-01-12 | Denso Corp | Ignitor for internal combustion engine |
| JP5342592B2 (en) * | 2011-03-31 | 2013-11-13 | 三菱重工業株式会社 | Cylinder structure of internal combustion engine |
| DE102013021547A1 (en) | 2013-12-18 | 2014-07-31 | Daimler Ag | Cylinder head for internal combustion engine, has combustion chamber roof that is formed partially by cylinder head portion and partially by receptacle for spark plug and is partially limited by insert portion |
| AT16206U1 (en) * | 2017-12-19 | 2019-03-15 | Ge Jenbacher Gmbh & Co Og | Cylinder head for an internal combustion engine |
| GB2602289B (en) | 2020-12-22 | 2023-09-27 | Caterpillar Energy Solutions Gmbh | Improved contact surface of the spark plug jacket |
| US12258929B1 (en) * | 2022-08-05 | 2025-03-25 | Paul J. Gremillion | Method and apparatus for sealing a spark plug well |
Family Cites Families (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB119637A (en) * | 1918-06-15 | 1918-10-10 | Motosacoche Sa | Improvements in or relating to Ignition Devices for Water Cooled Explosion Motors. |
| US2234780A (en) * | 1938-12-16 | 1941-03-11 | Gen Motors Corp | Cylinder head construction |
| SE8600191L (en) * | 1985-01-18 | 1986-07-19 | Honda Motor Co Ltd | FORBRENNINGSMOTOR |
| US5033426A (en) * | 1990-08-22 | 1991-07-23 | Cummins Engine Company, Inc. | Radial combustion seal |
| US5295462A (en) * | 1992-10-16 | 1994-03-22 | Cummins Engine Co., Inc. | Coin insert for the firing deck in an internal combustion engine |
| DE69414557T2 (en) * | 1994-06-15 | 1999-04-01 | Yamaha Hatsudoki K.K., Iwata, Shizuoka | Cylinder head arrangement for a multi-valve internal combustion engine with an overhead camshaft |
| DE4421057C1 (en) * | 1994-06-16 | 1995-09-14 | Porsche Ag | Cylinder head arrangement for IC engine |
| JP3556725B2 (en) * | 1995-03-20 | 2004-08-25 | 三菱電機株式会社 | Ignition device for internal combustion engine |
| DE19619183C1 (en) * | 1996-05-11 | 1997-07-03 | Porsche Ag | Cylinder head arrangement for internal combustion engine |
| US5979387A (en) * | 1996-11-14 | 1999-11-09 | Strait; William P. | Quick replacement spark plug assembly |
| US5706847A (en) * | 1996-11-14 | 1998-01-13 | Strait; William P. | Quick replacement spark plug assembly |
| US6213109B1 (en) * | 1997-07-04 | 2001-04-10 | Hitachi, Ltd. | Ignition coil for use in internal combustion engine |
| US6138637A (en) * | 1997-09-18 | 2000-10-31 | Daimlerchrysler Ag | Internal combustion engine with direct fuel injection |
| DE29803618U1 (en) * | 1998-03-03 | 1998-06-10 | Kuntschar, Walter, 34466 Wolfhagen | Cylinder head or part of a cylinder head of an internal combustion engine with in particular four valves |
| JPH11329666A (en) * | 1998-05-15 | 1999-11-30 | Ngk Spark Plug Co Ltd | Spark plug |
| US6149336A (en) * | 1998-05-29 | 2000-11-21 | General Motors Corporation | Compliant connector |
| EP0967370B1 (en) * | 1998-06-26 | 2005-03-30 | Yamaha Hatsudoki Kabushiki Kaisha | Internal combustion engine |
| JP2000087796A (en) * | 1998-09-14 | 2000-03-28 | Honda Motor Co Ltd | DOHC engine cylinder head |
| JP3546753B2 (en) * | 1999-04-22 | 2004-07-28 | 日産自動車株式会社 | Engine cylinder head |
| US6216679B1 (en) * | 1999-07-27 | 2001-04-17 | Delphi Technologies, Inc. | Ignition coil for an internal combustion engine |
-
1999
- 1999-06-24 DE DE19928838A patent/DE19928838C1/en not_active Expired - Fee Related
-
2000
- 2000-06-21 AT AT00113234T patent/ATE312281T1/en not_active IP Right Cessation
- 2000-06-21 DE DE50011795T patent/DE50011795D1/en not_active Expired - Fee Related
- 2000-06-21 EP EP00113234A patent/EP1063408B1/en not_active Expired - Lifetime
- 2000-06-23 US US09/602,260 patent/US6675760B1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| ATE312281T1 (en) | 2005-12-15 |
| US6675760B1 (en) | 2004-01-13 |
| DE19928838C1 (en) | 2001-02-15 |
| DE50011795D1 (en) | 2006-01-12 |
| EP1063408A2 (en) | 2000-12-27 |
| EP1063408A3 (en) | 2001-11-28 |
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