Untitled record

concerning sealing assembly and method for its production.

The invention relates to a seal assembly and in particular relates to cylinder head gaskets for combustion sinotors.

ISs are already numerous constructions of cylinder head gaskets known for internal combustion engines These gaskets usually include a thin-walled flat bzv /. planar body having a plurality of openings including the cylinder openings and other openings through which water flows. "These openings are arranged in the dispersion body so as to be in alignment with the cylinder bores as well as with water or water." Oil to be flowed through openings of a cylinder block and a .Cylinder head can be brought »The actual sealing body has the task Seal the openings on their belts in such a way that there are no connections between the cylinder openings and the openings to be flowed through by water or oil_e

In the case of large, high compression ratio internal combustion engines operating at high temperatures and pressures, it has been customary for some years to use cylinder head gaskets which are widely used in the industry.

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the cylinder bores or combustion chambers are provided with a reinforcement or armor to seal the cylinder bores and the. other parts of the seal to protect against the action of high temperatures and pressures. In many cases, the actual sealing body consists of asbestos or suitably reinforced asbestos or an impregnated asbestos sealant material,. and it is provided with an armor of the type described. "Such a seal construction is described in U.S. Patent No. 1,819,694." In this construction, the entire sealing surface including the cylinder openings of the gasket is cichutz or " armored »

Later, it has been shown that one of the Sander of Dichtlcörpers in the area of ​​the cylinder openings ujt, closing armor sufficient to protect the seal zxx and. to ensure a perfect seal between the cylinder head and the cylinder block in the area of ​​the cylinder bores. In a likewise known typical construction, a main sealing body is provided which comprises flat pieces of impregnated asbestos material. .the metal faces are fixed to the faces of a piece of flat material facing away from each other. The edges of the sealing bodies of the sealing body are of U-shaped metal rings surrounding the cylinder bores. Cross section urcschloosen ,. These children, with a U-shaped cross section, encircle the hands of the burners and extend above and below the hands of the mouths. On the contrary, these well-known Ii are suitable for use in many cases, but in certain cases they are inadequate in other cases "Be some Construltion-jionen, where they are fundamentally" usable, they do not always invoke an e /. - ".": The lit iin {-, and l'-iriri.us arise Significant comments regarding the u-eiTÜ'i are perfectly correct. "

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Further, it has already been proposed to provide cylinder head compaction assemblies in which an armored sealing material is placed in a combustion port and held in place by tongues formed on the main seal body extending inwardly toward the combustion ports and communicating with the combustion chamber Working together tank material. Although this seal skonstruk tion a very significant improvement compared to the previously known cylinder head gasket assemblies. is_t However, the invention now provides novel embodiments of cylinder head Dichtimgsbaugruppen, which offer further advantages and prove to be very useful.

More specifically, the invention provides an improved seal assembly suitable for use in cases where the seal assemblies heretofore known prove to be inconvenient Furthermore, the seal assemblies of the present invention are very well suited for use in the same cases in which Diclitungsbau groups known type are usable. The invention provides a cohesive assembly which can be handled and used as a sealing unit and in which the functions of the main seal body and the cylinder bore sealing, armored seal portions are isolated from each other at certain points. In addition, the sealing assemblies according to the invention are simpler in comparison to known constructions and can be manufactured at lower costs.

A formed according to the invention seal assembly, z. a cylinder head gasket assembly comprising a main dicliturium body delimiting at least one combustion opening dimensioned so that nan can arrange it in the y-pipe to surround a sylvatore bore. Within the combustion process, there is a difference in the depth of the combustion chamber

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arranged-, which can be compressed between a cylinder block and a cylinder head to effect a seal between these components₀ This second sealing device is supported in the combustion opening of the main seal body by a plurality of circumferentially spaced, integral with the second sealing device outwardly projecting tongues, · Bridging the space between the second sealing device and the main sealing body and operatively connecting the two "files". The second sealing device is preferably an armored sealing device comprising a ketal ring_v U-shaped cross-section opening towards the edge of the opening of the main seal body and provided with the outwardly projecting tongues "This' U-shaped cross-section ring may be at least partially preformed and with a ring of lethal wire are then assembled into the combustion port of the seal body. "Although the seal assembly has a generally planar shape, and the second sealing device is disposed generally parallel to the main body and generally within its obstruction opening, but it should be noted that during the use of smoke, the second sealing device is somewhat inferior to the second sealing device

™ can shift main sealant body without displacing the edge of the burnout adjacent to the main body of the main dicbe body. "

The invention and advantageous details of the invention will become apparent from the following description of the examples in which reference is made to Scottish drawings.

Fig_O 1 z oi in the o-runiriß part of a erfindunisgemäßen cylinder head gasket.

Fig. 2 shows in a larger laßstab in a part-cut - a cylinder head and a. Cylinder block πίτ of a seal arranged between these parts after -'a- ia.;? »1. -

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Fig_e 3 is an enlarged, partially broken away section of FIG_O

FIG. 4 is an enlarged view ^rFiling along the line 4-4 in Fig. 3 «

Fig_e 5 is an enlarged rope cut along the line 5-5 i *¹ Figo 3 ·

6 shows in perspective one of a further embodiment of a sealing assembly according to the invention,

Fig. 7 shows in perspective further details of the seal assembly according to Fig. 6 »

In Figs. 1 and 2 can be seen a total of 10 designated cylinder head seal assembly according to the invention, which is designed so that they can cooperate with a cylinder block 12 and a cylinder head 14_O Of course, the cylinder head seal assemblies of the present invention may be formed in a variety of other ways to accommodate cylinder blocks and cylinder heads of a different construction

The cylinder block 12 has a plurality of openings including a plurality of cylinder bores 16 and a plurality of cylindrical holes 18 to be flowed through by oil or water; in Fig. 2, only one cylinder bore 16 and one of the holes 18 shown in each cylinder bore 16 is a cylinder liner 20 is installed, which rests with sealing effect on the cylinder wall, and with which a piston -22 with piston rings 24 cooperates in a known ¥ eise , The cylinder head 14 delimits an upwardly curved cable 26 of a combustion space s lying above the cylinder bore 16 and is also provided with a plurality of bores 28 which are to be flowed through by the bores IS of the cylinder head and are to be flowed through by Cl or , Corner screws 30 are provided which connect the cylinder head nit the cylinder block and serve daüu, the

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assembly 10 and bring it with sealing effect in contact with the cylinder block and the cylinder head in the vicinity of said openings »

Referring to Figures 1 and 2, the seal assembly 10 includes a main seal body 40 composed of multiple layers. The body 40 includes a central sheet 42 of sheet metal from which tongues or tines are cut out on both sides and bent outwardly According to FIG. 4, after the production of the sheet 42, a piece of flat material 46 made of asbestos is arranged on each side of the plate 31, which is provided with a known heat, oil and water filter. impregnated in a continuous manner. These layers or flat pieces of material are pressed together lying on one another, the tongues 44 assuming the position shown in FIGS. 2 and 4 in order to firmly connect the asbestos layers to the centrally arranged sheet.

Thereafter, this layered dressing z_Oa_O These apertures and passages comprise of oil or water to dux quenching oil orifices 48 which are sized and arranged to make connections between the adjacent jaws of the bores 18 and 28. Make the openings 48. Flow connections between the bores 10 and 25 and cause at its periphery an -Abdichtung to "iSiitweichen 01 or« water in the region of the openings 48 to prevent »Furthermore, the Dichtuns sbaugruppe with openings 50 for receiving the screws 30th provided which protrude through the cylinder head 14 and are screwed into Gewindebohximgen 52 -a.es cylinder block 12 ,,

Lastly, the Soil Force should be provided with extrinsic openings surrounding the cylinder bores 16, and in the cylinder of which the cylinder bores should be sealed against the surrounding parts of the diclitium structure. body 40 several

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through continuous combustion apertures 60, and in each of these apertures is disposed a second sealing device 62 which, according to the drawings, comprises a metal ring 64 having a generally U-shaped cross-section parallel to and in the same plane as the main sealing body 40 is. In the closed part of the metal ring 64 is a wire ring 66, which contributes well known to make a perfect seal. The holes 65 of the ketal ring are separated by a distance, they extend parallel to the outside, and confine at their outer ends an open channel, the opening of which is the hand of the combustion port; 60 ^ faces the main seal assembly »The open outer side of the metal ring is arranged according to FIG. 5 at a small distance from the hand of the combustion opening 60.

The second seal assembly 62 is disposed within the combustion port 60 and connected to the main assembly 40 by a plurality of circumferentially spaced tongues 70 extending toward the hand of the combustion port 60 and beyond that hand. The tongues 70 are in one piece with the legs 65 of the metal ring 64 and extend through the skin between the heddle ring and the hand of the combustion opening 60 to suspend the seal assembly 62 against the main seal assembly 40 to provide the proper seal position in the opening 60 occupies. It should be noted that in the embodiment described herein, the circumferentially spaced tongues 70 extend alternately across the top and bottom of the main gasket body 40 to support the second assembly 62 without any obstruction thereon Dichtuii-jsbaugruppe 10 occupies. The tongues have a narrow width, they are not fixedly connected to the main sealing body 40, and they protrude beyond the top and the bottom of the main sealant body only as far as necessary to make up the interrelations of the parts

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To ensure that the second assembly 62 is displaced in the lateral direction relative to the main sealing body 40 before installation. "

It should be noted that the second assembly 62 may be prefabricated as a subassembly, which is then combined with the main body 40. For this purpose, one can install the wire ring 66 in a blank for the metal ring 64, in which the tongues 70 of one of the legs 65 have been bent in axial direction so that the metal ring or the Bohteil can fall into the opening 60 of the main body 40 and on the tongues 70 of the other leg 65, whereupon the axially bent tongues are bent back so that they occupy the apparent from Fig. 1 to 4 position · '·

Figs. 6 and 7 show a second embodiment of a cylinder head seal assembly according to the invention, which offers particular advantages and allows a further reduction of manufacturing costs. Referring again to Figs. 6 and 7, a main seal body 40 is provided in conjunction with a second seal assembly -62a, the latter comprising a metal ring 64a having a T-shaped cross-section which encloses a wire ring 66. ·

The metal ring 64a is in turn provided with a plurality of tongues for supporting the second seal assembly. It should be noted, however, that the tongues are associated with only one of the legs 65a of the metal ring of U-shaped cross-section, that is, they are not alternately formed on both legs as in the embodiment of Figs. 1-5 distributed in the circumferential direction.

According to FIGS. 6 and 7, the tongues comprise several in. At first intervals distributed first tongue element 70a and a plurality of circumferentially spaced apart second tongue elements 70b. According to ΪΊ g. 5 it is possible to provide eight centimes, the four in equal u

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Distributed members 70a and four equally circumferentially spaced members 70b include: "Each pair of paired tongue members 70a and 70b may be separated by a small circumferential distance as shown in Figs. 6 and 7, or equally spaced as shown in Fig. 3.

The tongue elements 70a can have the same shape as that in 3 * 1%_O 3 tongue elements 70. The Zunpeneleraente 70b, however, have an elongated shape. After the wire ring 66 in the metal ring 64 a. are inserted and the metal ring has been formed so that it surrounds the wire ring, the tongues 70b are bent from their in Fig. 6 indicated by dashed lines position upwards, as shown in Fig "6 with solid lines. In this vveise one obtains a second seal assembly or an i'eilbaugruppe in which the wire ring 66 is held, and which can fall into an opening 60 of the main seal body 40 into fall, Let you let this éleabaugruppe fall into the opening 60, it is in the opening by the tongues 70a supported Then, the tongues are bent so between their .Find 70b, that portions 72 are formed, which are the wire ring 66 against ", as well as sections 74, which generally extend parallel to the tongues 70a and overlap the main sealing body 40 on its opposite side, it is obvious that the punching of the tongues from only one leg of the upper part for the upper ring would simplify the "Hersm.-. luiiv? of the kstallrings leads, and that it is possible to perform a pre-assembly of the second Diclitungsbaugruppe; This results in considerable advantages in comparison to the constructions known hitherto. where the installation of the armor criordarlich. makes the armor soffnun at the time of their .uibriraiiun ^ at the hand of the burning; and to form the main sealant so that it encloses the wire ring. "" The invention offers further advantages for this advantage "

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In a typical seal assembly according to the present invention, the main dispersion body 40 has a thickness of about 15 mm_}, a tamped wire ring 66 with a diameter of about 0.92 mm is used as a bladed mild steel, the ring of U-shaped 4^uers1 is made of a stainless material of edging 321 having a thickness of about 0.152 mm, and the diameter of the burn opening 60 is about 127

It should be noted that the seal assembly 10 is subjected to different operating conditions at different locations_O Extremely high temperatures and pressures of up to * occur on the armored cylinder openings.

about 170 kg / cm. Furthermore, the edges of the cylinder openings are exposed to the action of the flame and the sparks. On the other hand, the pressure of the Gis and of the water in the bores 18 and 28 seldom exceeds a value of 7 kg / cm. , Therefore, it is necessary to apply to the cylinder bores a substantially greater atomic force than to dejn-to-air flows from oil to water. - ■ - '

The seal assembly according to the invention "offers numerous important advantages in comparison to the cylinder head diclituses known hitherto. In the known Sylinäerkopf seals, the typical metal ring of U-shaped cross section forms parts which face the top and the bottom of the main seal body along the whole surface of the combustion openings 50 or overlap. In these known seals, it is necessary to have a very large diameter effecting high pressure in order to squeeze the oil of the U-section through an embossing process into the segments of the flacix sides of the sealing body. as long as the children do not enter into these acts; The seal assembly does not seal the oil or oil pass through it, and also at the circumference of the cylinder bores, it does not produce an oil-free seal.

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In a typical known seal of the type just discussed with a central layer, two cover layers of impregnated asbestos and a covering overlapping Hing the aforementioned type of U-shaped cross-section, the application of a considerable embossing pressure is required. When the legs of the ring of U-shaped cross section overlap the main sealing body over a width of about 1.5 Da and the diameter of the opening is about

127 At a tested seal, a force of nearly 9100 kg was required to push the legs of the inner ring so far into the seal body, that their outer surfaces should be in the same Layers lay like the I'lachseiten of the main seal body ·

From the description of the invention it can be seen that even if it is assumed that the tongues overlap the main seal body over a distance of about 1.5 mm, the small circumferentially spaced tongues form only a very small surface exposed to such embossing pressure and that this area represents only a very small fraction of the mentioned area of ​​about 6.5 cm, which must be pressed in.den in a similar seal of known type in.den the sealing body. This means that there is a considerable additional force by means of which the sealing assembly can be compressed in order to obtain a perfect seal and that this force is available in addition to the force available in the known seals r_an assumes that the same viesamtkraft brought to ./irkuns between the cylinder head and deaa cylinder block tri.rd. Ba the full pressure load of Diclitungsbauoen

Group is available and, as a matter of fact, does not press in any force which is needed

In addition, the oil is better sealed to that of Ol. rr. It is, since it is not necessary to apply a jagging power of eg ^ jpj ^ | e ^ (^ || e, it is

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it is also possible to reduce the load on the seal assembly if the other operating conditions do so. Furthermore, it can be seen that the smallness of the surface area of ​​the tongues means that even the application of a relatively small force is sufficient to press the tongues into the main sealing body.

It has further been found that the use of a cylinder head gasket assembly according to the present invention in which the actual cylinder gaskets are supported by the main body of the gasket by a plurality of circumferentially spaced tongues associated with the cylinder gaskets results in a more even distribution of stresses in the cylinder head and the cylinder head Cylinder block comprehensive assembly leads, so that throws the cylinder head to a lesser extent, bent or otherwise deformed. When using seals of the known type described, if the screws 30 are tightened to hold the ropes together with sufficient force, the cylinder head bends somewhat as the imprinting forces to be applied_v Too large · This then occur in addition to the normal tensile forces on the screws 30 acting forces, which in some cases lead to breakage of the screws. On the other hand, when using seal assemblies according to the present invention, the cylinder head and the cylinder block tend to maintain their desired parallel position even when a compressive force is applied, and the vibration of the cylinder head during operation of the engine weakens.

Another advantage of the inventive seal assemblies is that they are virtually the actual ones. Cylinder seals are kept separate from the main sealing body. According to FIG. 2, the second bending assembly does not necessarily have to remain equidistant from the two faces of the main sealing body. This is shown in FIG. 2 attributed to the fact that the upper iJtir'ni'läcr.e the cylinder liner 20 is higher than the Hauptflfe'che

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at the top of the Zjlinderblocks. If this is done with a king of U-shaped cross-section, which in the known sealing constructions overlaps the top and bottom of the main body, the entire hand of the sealing body surrounding the opening is displaced upwards along the circumference of the combustion zone; In particular, when openings to be flowed through by water are arranged at a fairly small distance from the cylinder openings 60 or the cylinder openings are separated by very small distances, in practice no perfect sealing is achieved and leaks occur by which the life of the thief construction group is violated, and which give rise to an unwanted mixing of the river, which are located in the zones to be sealed against each other.

On the other hand, if the tongues according to the invention are used, the surface area of ​​which, like their section, is very small, the presence of a higher face of the cylinder liner or displacement of the two seal assembly relative to the main seal body will only result in minimal problems. In accordance with the invention, even the use of seal assemblies is contemplated in cases where substantial displacement occurs, so that the two seal assemblies or elements can be completely separated from each other during their installation, without compromising the sealing ability of the two Assemblies' reduced.

Furthermore, it is obvious that the arrangement of ivaii_b-in the Sing the production of the whole Bichtjungqbc -u ;; ruj.rpe in several rafts simplified. In addition to the already mentioned advantages, it should be noted that the Vex-biunenr55Ö;: fnⁱani: s 60 are smooth and none are in. Hicrit'xi :. wear on the elongated or the like. Therefore, the uauptdichtuxigskorper in a simpler way Goraäß the Lrfinciuiig it is also possible, the.Ab- "

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to reduce proportions between adjacent cylinders ^ since the tongues form part of the armor or reinforcement, and thus in contrast to the known seal assemblies no tongues are provided which extend from the hand of the combustion opening to the outside, or, as it is not required is to provide a complete enclosure for the hand of the combustion port. Egg performance provides more latitude for the designs of internal combustion engines, and it is possible to provide convenient contiguous seal assemblies that are suitable for use in difficult installation conditions.

Ask for an ozii el? E;

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