EP0405156A1 - Poussoir de soupape en forme de godet - Google Patents

Poussoir de soupape en forme de godet Download PDF

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Publication number
EP0405156A1
EP0405156A1 EP90110199A EP90110199A EP0405156A1 EP 0405156 A1 EP0405156 A1 EP 0405156A1 EP 90110199 A EP90110199 A EP 90110199A EP 90110199 A EP90110199 A EP 90110199A EP 0405156 A1 EP0405156 A1 EP 0405156A1
Authority
EP
European Patent Office
Prior art keywords
tappet
body according
tappet body
base
cup
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.)
Withdrawn
Application number
EP90110199A
Other languages
German (de)
English (en)
Inventor
Karl Seiberth
Gotthard F. Wolf
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.)
Sinterwerke Grenchen AG
Original Assignee
GMB Giesserei and Maschinenbau Bodan 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 GMB Giesserei and Maschinenbau Bodan AG filed Critical GMB Giesserei and Maschinenbau Bodan AG
Publication of EP0405156A1 publication Critical patent/EP0405156A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/14—Tappets; Push rods
    • F01L1/143—Tappets; Push rods for use with overhead camshafts
    • 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
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/20—Adjusting or compensating clearance
    • F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
    • F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
    • F01L1/245—Hydraulic tappets
    • F01L1/25—Hydraulic tappets between cam and valve stem
    • 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]

Definitions

  • the invention relates to a bucket tappet body for valve tappets, comprising a cylindrical guide body, a tappet base and an element that holds a valve support and is carried by the tappet base.
  • Cup tappet bodies of this type are known, the element holding the valve support either being a guide cylinder for a hydraulic play compensation element or a valve support pin for valve tappets without hydraulic valve play compensation.
  • Cup tappet bodies of this type have so far mostly been welded together from two semi-finished parts, these semi-finished parts being produced by a large number of shaping steps or machining steps.
  • cup tappet bodies Such a production of cup tappet bodies is expensive and complex and also has the disadvantage that the use of very wear-resistant materials with good tribological properties means that forming or machining is difficult.
  • wear-resistant materials Particularly in the case of bucket tappet bodies for valve tappets with hydraulic valve lash compensation, however, there is an increasing demand for such wear-resistant materials, since in operation there is no longer any play between cams and valve tappets and thus increased wear requirements are placed on them.
  • the invention is therefore based on the object of providing a tappet body which can be produced in the simplest possible manner from wear-resistant materials and is therefore inexpensive with good wear properties.
  • This object is achieved in that the guide body and the tappet base are produced in a casting-related manner and in that the element holding the valve support is integrally connected to the tappet base and / or the guide body.
  • the great advantage of the solution according to the invention is to be seen in the fact that the casting connection between the guide body and the tappet base makes the cup tappet body very simple, in particular, for example, without a welding process and at the same time with excellent stability, and also that the element holding the valve support either in a simple and stable manner either with the pestle bottom and / or connected to the guide body. Furthermore, the use of very wear-resistant and therefore tribologically advantageous materials is possible in the solution according to the invention.
  • the term "manufactured using a casting technique” is either to be understood to mean that the entire tappet body is cast in one piece or because at least parts of the tappet body are cast and thereby cast onto already prefabricated parts, so that parts are cast on of the bucket tappet body to the prefabricated parts is finally connected to all the parts forming the bucket tappet body.
  • the element holding the valve support is either connected in one piece to the tappet base and / or in one piece with the guide body.
  • the tappet base can either be prefabricated or also cast.
  • the element holding the valve support is cast in one piece together with a part of the tappet base adjoining this.
  • the plunger base is then also cast in the course of the technical connection of all parts of the cup tappet body, or it is also conceivable that the plunger base is a prefabricated cast part.
  • the basic idea of the invention is to be seen in the fact that the individual parts of the tappet body are connected to a single part by casting one part onto the other parts. Which part is cast is not specified.
  • the guide body is produced as a casting in the course of the casting connection between the guide body and the tappet base, so that at least the guide body is cast and the casting of the guide body leads to the connection of all parts of the cup tappet body.
  • An advantageous variant of the bucket tappet body described above is characterized in that the guide body is cast onto the tappet base comprising a semi-finished part.
  • a further advantageous possibility of creating a firm connection between the semi-finished part and the cast-on parts is to encapsulate the semi-finished part in regions, for example to encapsulate the element holding the valve support at least in sections.
  • the semifinished part is designed to be castable in a form-fitting manner on the gate side.
  • the plunger base is prefabricated as a semi-finished part
  • a preferred variant of the present invention provides that the element holding the valve support is prefabricated with the plunger base as a semi-finished part, so that the guide body is cast onto this semi-finished part.
  • the guide body, the tappet base and the element holding the valve support are cast as one piece.
  • the tappet base is to be as light as possible in terms of weight, it is necessary to make all parts as light as possible, ie as thin-walled as possible.
  • the guide body has a reinforcing element running in a plane running parallel to the tappet base. This reinforcing element leads to a stiffening of the guide body, so that it can be made thinner overall.
  • This thinner-walled design of the guide body is expressed, for example, by the fact that the guide body has an undercut between the reinforcing element and the tappet base following the reinforcing element.
  • the reinforcing element is preferably designed such that it projects inward beyond an inner lateral surface of the guide body.
  • the guide body has an oil groove on its outer lateral surface at the level of the reinforcing element, if necessary, so that preferably the reinforcing element and the oil groove form a bead in the guide body.
  • the reinforcing element can be arranged at any point on the tappet body.
  • the reinforcing element it is conceivable to arrange the reinforcing element on the lower edge of the guide body in order to stiffen this free edge opposite the tappet base, in particular for the final processing of the tappet body.
  • the reinforcing element is arranged in a central region between the plunger base and a free edge of the guide body opposite the plunger base, since with this arrangement of the reinforcing element there is sufficient stiffening of the guide body and, on the other hand, for example the possibility opens up of the reinforcing element to combine with an oil groove arranged in the same area.
  • the reinforcement element could also be connected as a prefabricated part in the course of the casting connection.
  • the reinforcing element is connected in one piece to the guide body and is thus cast in one piece with the guide body in the case of a cast guide body.
  • the guide body has a reinforcing rib cast onto it and extending in a plane parallel to its cylinder axis, preferably several reinforcing ribs being provided which are at equal angular distances from one another.
  • the reinforcing rib can in principle be arranged in a wide variety of orientations.
  • a simple solution which is advantageous in terms of stability provides that the reinforcing rib runs in the radial direction to the cylinder axis of the guide body.
  • the reinforcing rib runs parallel to a tangential direction of the outer surface of the guide body.
  • reinforcing ribs In the previously described exemplary embodiments of reinforcing ribs, no consideration has been given to how far the reinforcing rib should extend in the cup tappet body. For example, it is advantageous if the reinforcing rib extends over the tappet base to the element holding the valve support.
  • the reinforcing rib extends from the reinforcing element over the inner circumferential surface of the guide body.
  • the reinforcing rib rises between the element holding the valve support and the inner circumferential surface of the guide body above the tappet base at most approximately up to the height of the element holding the valve support.
  • the reinforcing rib extends on the inner circumferential surface of the guide body from the tappet bottom to the reinforcing element or beyond the reinforcing element.
  • a special embodiment of the reinforcing rib provides that it forms a stiffening triangle connected to both the tappet base and the guide body.
  • the reinforcing rib could only act selectively on the part to be reinforced, for example on the inner circumferential surface of the guide body or the tappet base. However, it is particularly expedient if the reinforcing rib extends from the entire length
  • Another advantageous exemplary embodiment provides for the height of the reinforcing rib that it rises from the tappet base and preferably also from the inner surface of the guide body by approximately the same height as the reinforcing element from the inner surface of the guide body.
  • the element holding the valve support can be designed in the most varied of forms.
  • An advantageous embodiment provides that the element holding the valve support is a valve support pin rising from the tappet base.
  • the element holding the valve support is a guide cylinder for a hydraulic valve clearance compensation element.
  • the supply of the oil space is advantageously carried out in that the oil space is provided with an oil supply line running to the outer jacket side of the guide body, the oil supply line advantageously opening into the oil groove.
  • the bucket tappet body according to the invention is to be made as simple as possible from a manufacturing point of view if the oil supply runs through a reinforcing rib, which is advantageously thickened to accommodate the oil supply .
  • a variant that is particularly advantageous from the point of view of the material mass is characterized in that the guide cylinder forms a guide ring for the valve clearance compensation element on its side facing away from the tappet base and, between this and the tappet base, a base ring that carries the guide ring and has a larger inner and outer diameter than the guide ring has, so that the oil space is formed between this and the valve clearance compensation element.
  • An advantageous embodiment of the tappet body according to the invention therefore provides that the cast part of the tappet body is made of cast iron.
  • the cast iron expediently has a partially or completely metastably solidified structure, at least in the region of the ram base.
  • a cup tappet body of this type is manufactured, for example, from hard chilled cast iron or partially carbide cast iron. This embodiment is particularly useful in order to optimize the tribological properties of the tappet base on which the cam of a camshaft rests, i.e. as wear-resistant as possible and adapted to the material of the camshaft.
  • the cast iron can be thermally uncured. However, it is even more expedient if the cast iron is thermally or thermochemically hardened.
  • hardening the cast iron is for it to be hardened by heat treatment with phase change.
  • thermochemical edge zone hardening e.g. a nitriding, nitrocarburizing or case hardening.
  • Another alternative or additive measure involves the cast iron being hardened by remelting.
  • the inventive concept of a cup tappet body in particular the technical connection of the parts of the same, also offers the possibility that the cast part Part of the tappet body is cast from steel.
  • steel For example, case hardening steel can be used as steel, but it can also be tempered steel, nitriding steel, tool steel or high-speed steel. As a rule, all these types of steel cannot be processed, or can only be processed with great difficulty, and also involve difficulties in machining.
  • the inventive design of the casting connection and the near-net-shape production of these parts creates the possibility of also producing the tappet body according to the invention from these materials.
  • the cast part of the tappet body is cast from a light metal alloy.
  • This light metal alloy is preferably an aluminum alloy or a titanium alloy.
  • the light metal alloy is reinforced with fiber or wiskers.
  • the tappet body according to the invention is not completely cast, but rather comprises a semi-finished part, it is particularly expedient according to the invention if the semi-finished part is made of steel.
  • These steel materials can be selected according to the required tribological properties, in particular of the tappet base, and thus create the possibility, with respect to those parts of the tappet body, that are less so Wear is subject to using simpler and cheaper materials. All steels already described above can be considered as steel materials.
  • the semi-finished part is made of ceramic material.
  • the ceramic material also offers tribologically advantageous properties and also opens up the possibility of designing the remaining parts of the tappet body with cheaper or simpler materials.
  • the semi-finished part is made of hard metal, which also offers advantages due to its properties, in particular for the plunger base.
  • the cast part of the bucket tappet body is produced by casting, which is preferably a near-net shape casting that the tappet body only has to be subjected to grinding operations.
  • the cast part of the tappet body was produced by powder metal injection molding.
  • the object of the invention is also achieved by a method for producing a tappet body for valve tappets with the features mentioned above in that the entire tappet body is cast largely close to the final shape.
  • the object according to the invention is also achieved by a method for producing a tappet body for valve tappets if a part of the tappet body is produced as a semi-finished part and is produced by casting the other parts of the cup tappet body onto the semi-finished part of the cup tappet body as a casting-related composite part to a close to the final shape.
  • cup tappet body is perfected by reshaping following the largely near-net shape casting.
  • a first exemplary embodiment (FIG. 1) of a cup tappet body 10 according to the invention for valve tappets comprises a cylindrical guide body 12 which is closed at the top by a tappet base 14 and which has a lower opening 18 delimited by a lower edge 16 opposite the tappet base 14.
  • the guide body 12 preferably has a circular cylindrical shape, so that its wall 20 has an outer lateral surface 22 as the outer cylindrical surface and an inner lateral surface 24 as the inner cylindrical surface.
  • the wall merges in one piece into the tappet base 14, which preferably has a cam contact surface 28 which is perpendicular to a cylinder axis 30 of the guide body 12.
  • the guide body 12 is provided with a reinforcing element 32 shaped like a bead, which is approximately parallel to the plunger base 14 Plane, preferably in a plane perpendicular to the cylinder axis 30 and stands out as a bead from the inner surface 24 in the direction of the cylinder axis 30, and at the same time creates an oil groove 34 on the outer surface 22, which is also in a plane parallel to the reinforcing element 32, preferably within the scope of the invention, the thickness of the wall 20 is also substantially constant in the area of the reinforcing element 32.
  • the reinforcing element 32 with a trapezoidal cross section rises from the inner lateral surface 24 and also the oil groove 34 also has a trapezoidal cross section, both cross sections being such that the thickness of the wall 20 is approximately constant remains.
  • a guide cylinder 36 rises from the tappet base 14 on its side opposite the cam support surface 28 in the direction of the lower edge 16 and coaxially to the cylinder axis 30 for a hydraulic valve lash adjuster element 38, which is only indicated by dash-dotted lines.
  • This guide cylinder 36 comprises a base ring 40 directly adjoining the tappet base 14 and a guide ring 42 carried by the base ring 40, which is the actual guide for the hydraulic valve clearance compensation element 38.
  • the base ring 40 has a larger inner diameter than the guide ring 42, so that an undercut creates an oil space 44 between the base ring 40 and the hydraulic valve clearance compensation element 38 between the guide ring 42 and the tappet base 14.
  • an overflow 48 in the form of a depression in this base surface 46 is provided in a base surface 46 of the guide cylinder 36 which is parallel to the cam support surface 28 and is arranged opposite this on the tappet base 14 creates a connection between the oil space 44 and an interior of the hydraulic valve lash compensation element 38.
  • the overflow 48 can be a depression with a round outer edge.
  • the overflow 48 is preferably provided with an essentially quadrangular outer edge.
  • an oil supply channel 50 is provided between the oil groove 34 and the oil space 44.
  • This oil supply channel 50 preferably runs in a rib 52 which is pulled up from the tappet base 14 and connects the wall 20 to the guide cylinder 36 and which is pulled up so far that it extends from the oil groove 34 and into the guide cylinder 36 in the transition region between the base ring 40 and the guide ring 42 is able to completely accommodate the opening oil supply channel 50.
  • This rib 52 also serves as a reinforcing rib for stiffening the entire tappet body 10 and in particular for stiffening the wall 20 and the guide cylinder 36 together with the tappet base 14.
  • two further reinforcing ribs 54 are provided in the simplest preferred exemplary embodiment, which, however, in contrast to the rib 52, differ from the tappet base 14 and the Raise wall 20 between the reinforcing element 32 and the plunger base 14 in one piece over its entire length, namely by a height which, based on the inner lateral surface 24, corresponds approximately to a height of the reinforcing element 32 designed as a bead.
  • the reinforcing ribs 54 extend into a foot region 56 of the base ring 40.
  • the reinforcing ribs 54 and also the rib 52 run in the radial direction to the cylinder axis 30, in the simplest case the rib 52 forming a total of three reinforcements with the reinforcing ribs 54.
  • a plurality of reinforcements can be provided, so that, for example, a total of six reinforcements are also conceivable.
  • undercuts are provided between the reinforcing element 32 and the tappet base 14 and between the reinforcing ribs, be it as reinforcing ribs 54 or as rib 52, that is to say that the wall 20 of the guide body 12 to substantially the same thickness as that between the reinforcing member 32 and the lower edge 16. This also ensures that the tappet body has a mass that is as small as possible.
  • FIG. 3 of a cup tappet body according to the invention, designated as a whole by 60, the parts identical to the first exemplary embodiment are provided with the same reference numerals, so that reference can be made to the explanations for the description of the first exemplary embodiment with regard to their description.
  • the second embodiment differs from the first only in that the reinforcing ribs 54a form a reinforcing triangle between the plunger base 14 and the wall 20 of the guide body 12, which is pulled up from the plunger base 14 to the reinforcing element 32 with a cathete and extends from the other with the other cathete Inner circumferential surface 24 of the wall 20 extends approximately centrally between the latter and the guide cylinder 36, the reinforcing rib 54a continuing over the remaining part up to the foot region 56 of the guide cylinder 36 at a height which corresponds approximately to a height of the reinforcing element 32.
  • a third exemplary embodiment of the cup tappet body according to the invention designated as a whole by 70, shown in FIG. 4, the parts identical to the first exemplary embodiment are provided with the same reference numerals, so that with regard to their description, reference can also be made to the explanations for the first exemplary embodiment.
  • the reinforcing rib 54b is pulled up as far from the plunger base 14 as the rib 52, that is to say it extends on the one hand from the plunger base 14 to the reinforcing element 32 and on the other hand from the plunger base 14 to almost the lower edge 72 of the guide cylinder 36 and thus fills almost the entire free space between the inner circumferential surface 24 and the guide cylinder 36.
  • a fourth embodiment of the bucket tappet body according to the invention designated as a whole by 80 and shown in FIGS. 5 and 6, the parts that are identical to the first embodiment are provided with the same reference numerals, so that with regard to their description, again refer to the explanations for can refer to the first embodiment.
  • the reinforcing ribs 54c are no longer arranged to run radially to the cylinder axis 30, but instead run parallel to one another and parallel to a tangent to the outer circumferential surface 22 or the base ring 40.
  • the reinforcing ribs 54c run as secants to the circular-cylindrical guide body 12, so that are offset far inward in the direction of the cylinder axis 30 so that they cut the base ring.
  • two such reinforcing ribs 54c running parallel to one another are provided, which rise from the tappet base 14 to approximately the height of the base ring 40 and extend at this height between opposite sides of the inner lateral surface 24. Only the part of the reinforcing rib 54c, which surrounds the oil supply channel 50, is made thickened and raised from the base ring 40 starting from an inner circumferential surface to the reinforcing element 32, so that the oil supply channel 50 can branch off from the oil groove 34 as in the exemplary embodiments described above.
  • All of the exemplary embodiments of the bucket tappet bodies 10, 60, 70, 80 described above are designed as a one-piece casting, which can preferably be produced directly by molding, which may be sand casting, fine material, precision casting in ceramic molds, mold casting, die casting or powder metal injection molding and the method chosen primarily depends on the material selected.
  • molding which may be sand casting, fine material, precision casting in ceramic molds, mold casting, die casting or powder metal injection molding and the method chosen primarily depends on the material selected.
  • cast iron based on GGL, GGG or malleable cast iron, which can be alloyed or unalloyed comes into consideration as materials for such a one-piece casting.
  • the tappet body is made of cast iron, which has a partially or completely metastable structure in the area of the tappet base, i.e. e.g.
  • Chilled cast iron is particularly advantageous for the production of a cup tappet body, since it allows the tribological properties of the cam contact surface to be easily adapted to cams also produced by casting, for example.
  • a hardening treatment of the cup tappet body can take place after the casting, in which, for example, the cast iron passes through Heat treatment with phase change is hardened.
  • thermochemical hardening of the edge zone of the cast iron or remelt hardening is also conceivable.
  • cup tappet body 10, 60, 70, 80 it is also conceivable to cast them from steel materials, such as case-hardening steels, preferably GS-15 Cr 3, GS-16 Mn Cr 5, GS-21 Ni Cr Mo 2, GS -16 Cr Mo 4 or tempered steels, such as preferably GS-53 Mn Si 4, GS-42 Cr V 6, GS-42 Cr Mo 4, or nitriding steels, such as preferably GX 38 Cr Mo V 5 1, GS-31 Cr Mo V 9, GS-34 Cr Al Ni 7, or tool steels, such as preferably 105 W Cr 6, X 210 Cr W 12 or high-speed steels, such as preferably S-6-5-2.
  • steel materials such as case-hardening steels, preferably GS-15 Cr 3, GS-16 Mn Cr 5, GS-21 Ni Cr Mo 2, GS -16 Cr Mo 4 or tempered steels, such as preferably GS-53 Mn Si 4, GS-42 Cr V 6, GS-42 Cr Mo 4, or nitriding steels, such as preferably
  • a one-piece tappet body 10, 60, 70, 80 from light metal alloys, for example aluminum-based alloys, such as Al Si 7 Mg, Al Si 17, Al Mg 9 Zn 1, Al Cu 4 Ti Mg or titanium Base alloys, such as preferably Ti Al 6 V 4, where the light metal alloys can still be fiber or wisker reinforced.
  • light metal alloys for example aluminum-based alloys, such as Al Si 7 Mg, Al Si 17, Al Mg 9 Zn 1, Al Cu 4 Ti Mg or titanium Base alloys, such as preferably Ti Al 6 V 4, where the light metal alloys can still be fiber or wisker reinforced.
  • tappet body according to the invention designated as a whole by 90 and shown in Fig. 7, those parts, insofar as they are identical to those of the first embodiment, are provided with the same reference numerals and additionally with a ', so that also with respect the description of which can be referred to the explanations for the first exemplary embodiment.
  • the tappet base 14 ' is exemplarily thicker than in the first embodiment and comprises a semi-finished part, designated as a whole with 92, which has a tappet base plate 94 which extends over the entire guide body 12', covers it and thereby the cam contact surface 28 ' wearing.
  • the plunger base plate 94 is then also the guide cylinder 36 'integrally formed with the base ring 40' and the guide ring 40 '. Furthermore, the tappet base plate 94 carries on its cam support surface 28 'opposite sprue elements 96, which are, for example, dovetail-shaped and allow a positive connection with a lower part 98 of the tappet base 14'. Similarly, the base ring 40 'and the guide ring 42' can be provided with sprue elements for the rib 52 or the reinforcing ribs 54.
  • the lower part 98 of the plunger base 14 ' is in turn made by this in one piece with the guide body 12' and the reinforcing ribs 54 and the rib 52 as a cast part, this cast part being cast onto the prefabricated semi-finished part 92 and thus technically connected to it to form a unit is.
  • the base ring 40 'and the guide ring 42' are cast in a ring shape and the ribs or the reinforcing ribs extend from this ring.
  • the manufacture of the tappet body 90 takes place in such a way that the semi-finished part 92 in turn is prefabricated by casting or also by machining, is produced from the corresponding material and then a casting of the semi-finished part 92 together with the guide body 12 'and the reinforcing ribs 54' and the Rib 52 'takes place.
  • the semi-finished part 92 can in principle be a semi-finished part that is produced from the same materials that have already been specified in connection with other exemplary embodiments.
  • This semi-finished part 92 is preferably made of very wear-resistant materials in order to ensure the necessary tribological properties of the cam contact surface 28 '.
  • FIG. 8 In a further embodiment (100) (FIG. 8) of the tappet body according to the invention, parts identical to the first embodiment are also provided with the same reference numerals and additionally with ", so that reference can be made to the above explanations regarding their description.
  • the plunger base 14 ⁇ also has a two-part shape, that is to say that the plunger base 14 ⁇ comprises a plunger base plate 102 which carries the cam contact surface 28 ⁇ and is produced as a semi-finished part, the Ram base plate does not extend in the radial direction to the cylinder axis 30 ⁇ to the outer circumferential surface 22 ⁇ , but has a smaller extent and is embedded in a support base 104, which is cast-molded with the guide body 12 ⁇ and which engages around the stem base plate 102 at its lateral edges 106 and is flush with it this concludes.
  • the lateral edges of the tappet base plate 102 are preferably also beveled in a dovetail-like manner, so that they enable the tappet base plate 102 to be positively anchored in the support base 104.
  • the tappet base plate 102 can be produced in the same way as the semi-finished part 92 from the same materials that were mentioned in connection with the one-piece tappet body 10, 60, 70, 80 and additionally also from hard metal or ceramic materials.
  • the tappet base plate 102 is also produced as a semi-finished part, and the support base 104 together with the guide body 12 ⁇ and also the guide cylinder 36 ⁇ is then integrally cast onto it in a casting process.
  • FIG. 9 and designated 110 A further example of a cup tappet body according to the invention, shown in FIG. 9 and designated 110, is insofar as it is identical to the first exemplary embodiment, provided with the same reference numerals and additionally with ′′′, so that the description of these parts refers to the explanations for the first Embodiment can be referenced.
  • no guide cylinder 36 is provided as the valve support element, but only a valve support pin 112 rising from the tappet base 14, so that the tappet body 110 is not used to accommodate a hydraulic valve play compensation element, but is used as a mechanical tappet.
  • the reinforcing element 32 ′′′ is not arranged approximately centrally between the tappet base 14 ′′′ and the lower edge 16 ′′′, but in the region of the lower edge 16 ′′′, and serves to stiffen the latter, in particular to facilitate subsequent processing of the tappet body 110 after casting .
  • valve support pin 112 exceeds a certain height, it is advantageous to provide the tappet body with a rib 54.
  • the cup tappet body 110 like the exemplary embodiments 10, 60, 70, 80 of the cup tappet body according to the invention, is produced in one piece from the same materials and according to the same methods as the cup tappet bodies 10, 60, 70, 80.
  • the tappet base similar to that of the cup tappet body 100 or to form the valve support pin 112 in one piece on a semi-finished part similar to the cup tappet body 90.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
EP90110199A 1989-06-24 1990-05-30 Poussoir de soupape en forme de godet Withdrawn EP0405156A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3920729A DE3920729A1 (de) 1989-06-24 1989-06-24 Tassenstoesselkoerper fuer ventilstoessel
DE3920729 1989-06-24

Publications (1)

Publication Number Publication Date
EP0405156A1 true EP0405156A1 (fr) 1991-01-02

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ID=6383488

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90110199A Withdrawn EP0405156A1 (fr) 1989-06-24 1990-05-30 Poussoir de soupape en forme de godet

Country Status (3)

Country Link
US (1) US5129372A (fr)
EP (1) EP0405156A1 (fr)
DE (1) DE3920729A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993003259A1 (fr) * 1991-08-02 1993-02-18 Ina Wälzlager Schaeffler Kg Tige-poussoir hydraulique a couronne
DE4209442A1 (de) * 1992-03-24 1993-09-30 Schaeffler Waelzlager Kg Stößel mit hydraulischem Ventilspielausgleich
EP0566526A1 (fr) * 1992-04-14 1993-10-20 Alusuisse-Lonza Services Ag Enveloppe en forme de tasse d'un poussoir hydraulique de soupape pour moteurs à combustion interne avec arbre à cames en tête
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WO1993003259A1 (fr) * 1991-08-02 1993-02-18 Ina Wälzlager Schaeffler Kg Tige-poussoir hydraulique a couronne
DE4209442A1 (de) * 1992-03-24 1993-09-30 Schaeffler Waelzlager Kg Stößel mit hydraulischem Ventilspielausgleich
WO1993019285A1 (fr) * 1992-03-24 1993-09-30 Ina Wälzlager Schaeffler Kg Poussoir a compensation hydraulique du jeu de soupape
EP0566526A1 (fr) * 1992-04-14 1993-10-20 Alusuisse-Lonza Services Ag Enveloppe en forme de tasse d'un poussoir hydraulique de soupape pour moteurs à combustion interne avec arbre à cames en tête
WO1994000675A1 (fr) * 1992-06-24 1994-01-06 Ina Wälzlager Schaeffler Kg Organe de commande de l'ouverture et de la fermeture des soupapes d'un moteur a combustion interne
DE4220584C2 (de) * 1992-06-24 2001-02-01 Schaeffler Waelzlager Ohg Ventiltrieb einer Brennkraftmaschine
EP0618352A2 (fr) * 1993-03-30 1994-10-05 Ngk Insulators, Ltd. Poussoir hydraulique
EP0618352A3 (fr) * 1993-03-30 1995-01-11 Ngk Insulators Ltd Poussoir hydraulique.
DE102010004908A1 (de) * 2010-01-19 2011-07-21 Audi Ag, 85057 Gussbauteil
DE102010004908B4 (de) * 2010-01-19 2016-09-15 Audi Ag Gussbauteil

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