EP0715681A1 - Tassenförmiger ventilstössel - Google Patents
Tassenförmiger ventilstösselInfo
- Publication number
- EP0715681A1 EP0715681A1 EP94924869A EP94924869A EP0715681A1 EP 0715681 A1 EP0715681 A1 EP 0715681A1 EP 94924869 A EP94924869 A EP 94924869A EP 94924869 A EP94924869 A EP 94924869A EP 0715681 A1 EP0715681 A1 EP 0715681A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- shirt
- cup
- shaped valve
- web
- valve tappet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 9
- 239000010959 steel Substances 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims description 14
- 229910052751 metal Inorganic materials 0.000 claims description 13
- 239000002184 metal Substances 0.000 claims description 13
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 12
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 7
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 229910052759 nickel Inorganic materials 0.000 claims description 5
- 238000002485 combustion reaction Methods 0.000 claims description 3
- 238000005275 alloying Methods 0.000 claims description 2
- 239000000945 filler Substances 0.000 claims description 2
- 239000000446 fuel Substances 0.000 abstract description 3
- 210000002414 leg Anatomy 0.000 description 12
- 239000007789 gas Substances 0.000 description 6
- 238000007747 plating Methods 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 238000009792 diffusion process Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 239000010953 base metal Substances 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 239000002923 metal particle Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005255 carburizing Methods 0.000 description 1
- 239000003562 lightweight material Substances 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 210000000689 upper leg Anatomy 0.000 description 1
- 239000002347 wear-protection layer Substances 0.000 description 1
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
Definitions
- the invention relates to a cup-shaped valve tappet for actuating a gas exchange valve of an internal combustion engine with a cylindrical shirt closed at one end by a bottom and guided in a bore in a cylinder head, a cam of a camshaft actuating the valve tappet at the bottom thereof.
- a cup-shaped valve tappet of the type specified in the preamble of claim 1 is known from EP-A-0030781.
- This valve tappet is provided with a hydraulic valve lash adjuster, wherein a web extending from the inner wall of the shirt accommodates this lash adjuster by means of a guide sleeve that runs concentrically to the shirt. Both the bottom, the shirt and the web are relatively thick-walled, as a result of which the valve tappet is heavy overall.
- large valve train masses require high spring forces to master the dynamics. However, these high spring forces lead to an increase in the friction in the valve train with the consequence of an increased fuel consumption. Another disadvantage of the increased valve spring forces is that noise in the valve train is amplified.
- the invention is therefore based on the object of considerably reducing the weight of a valve tappet of the generic type using simple means, so that the friction in the valve train and thus the fuel consumption of the internal combustion engine can be considerably reduced.
- the valve tappet should have sufficient rigidity to absorb the valve actuation forces.
- the wall thicknesses of the shirt and floor components made of a steel material are dimensioned such that a product P : of their wall thicknesses A x B ⁇ 2.3 is given in millimeters.
- the cup-shaped valve tappet is provided with a web extending from the shirt and receiving a guide sleeve which runs concentrically to the shirt, a hydraulic play compensation element being guided in this guide sleeve.
- the wall thickness of the web made of a steel material should be dimensioned such that a product P 2 of the wall thicknesses of bottom, shirt and web given in millimeters is A x B x C ⁇ 1.9.
- the use of an appropriately thin-walled web also has a positive effect on reducing the weight of the valve lifter.
- the wall thickness of the shirt should be reduced in an area below the web near the edge to form a collar.
- a product P 3 of the wall thicknesses of the floor, shirt, web and collar, given in millimeters, should be A x W x C x D ⁇ 1.48.
- an outer diameter E of the valve tappet for the product P 3 of the wall thicknesses of the base, shirt, web and collar is like 1 at a value which is ⁇ 0.075. This relationship of the product P 3 to the outer diameter E, which can also be expressed as ⁇ 0.075, shows that with a reduced diameter of the valve lifter, the wall thicknesses can be reduced considerably without any loss of rigidity.
- the specified wall thickness range is therefore considerably lower than the wall thicknesses realized so far.
- the web at its edge adjacent to the shirt should merge into a cylindrical section which forms an interference fit on the inside of the shirt, has a length of> 1 micron and is welded to the shirt, a weld depth of 0.6 to 0.8 mm is provided. In this way, welding through with the result of penetration of molten metal particles into the interior of the valve stem is avoided.
- the bottom and shirt of the valve lifter are clad on the inside with a non-ferrous metal, which according to claim 12 is preferably nickel.
- This inner plating pad serves as a diffusion barrier, so that only the outer functional surfaces of the cup tappet, namely the cup base and the cup shirt, are exposed to the carbon supply during the carburizing process. A hardening of the component with the known negative consequences is thus avoided.
- the leg of the guide sleeve is welded or caulked to the shirt, the non-ferrous metal being used as an alloying partner or as a caulking material.
- the leg of the guide sleeve must be soft during welding in order to ensure weldability at all.
- the plating pad has two tasks. On the one hand, it must prevent the shirt and bottom of the cup from being carburized from the inside and, on the other hand, it must guarantee the weldability of the already hardened cup. H. the plating layer is an alloy partner of the weld melt and thus prevents the weld seam from becoming embrittled since it remains austenitic. When caulking the leg of the guide sleeve in the shirt of the cup, it can be soft or hard, since the plating pad acts as caulking material.
- the leg of the guide sleeve should be rolled into the shirt.
- the thigh must be soft so that it can be rolled into the hardened shirt with internal plating at all.
- embrittlement of the leg, web and guide sleeve is prevented when the plunger is hardened by being plated on at least one side with a non-ferrous metal or being made of a low-hardenable or non-hardenable material .
- the plating pad also acts as a diffusion barrier for the offered carbon in this case, so that hardening of the leg, web and guide sleeve is prevented.
- the parts mentioned are made of a non-hardenable material, for example of an austenitic steel of the brand X 5 CrNi 1810 or of a low-hardenable material of the brand St 4, i.e. H. Manufactured without elements that increase hardenability, such as chrome, manganese, molybdenum or nickel, this also prevents their embrittlement.
- Fig. 1 shows a half section through a valve tappet according to the invention
- valve tappets according to the invention with a clad inside and different fastening of the guide sleeve.
- valve tappet 1 denotes a valve tappet cut along its longitudinal center line, which, guided in a bore 2 of a cylinder head 3 shown in sections, by a cam 4 of a camshaft 5 is actuated.
- the valve tappet 1 is cup-shaped, wherein it has a cylindrical shirt 6, which is closed at one end by a base 7. The entire unit consisting of shirt 6 and bottom 7 is preferably produced by a deep-drawing process.
- a web 8 extends from the cylindrical shirt and, at a funnel shape, merges into a guide sleeve 9 at its end.
- This guide sleeve 9 runs concentrically to the shirt 6 and accommodates a hydraulic play compensation element 10 in its interior.
- the play compensation element 10 is composed in particular of a hollow piston 11, a pressure piston 12, a ball valve 14 which is acted upon in the closing direction by a valve spring 13 and a pressure spring 15 which is supported between the hollow piston 11 and the pressure piston 12.
- the hollow piston 11 abuts the end of a valve stem end 16 of a gas exchange valve 17.
- a valve spring 18 of the gas exchange valve 17 is clamped between the cylinder head 3 and a spring plate 19 connected to the valve stem end 16 such that it moves the gas exchange valve 17 into a closed position.
- a lubricating oil bore 20 is provided, from which an inclined channel 21 into the valve stem! 1 receiving bore 2 opens.
- the cylindrical shirt 6 of the valve lifter 1 is provided on its outer lateral surface with an annular groove 22 which overlaps in phases with the outlet of this channel 21.
- An oil inlet opening leads from the annular groove 22 into the interior of the valve tappet.
- the funnel-shaped web 8, which can also be M-shaped, has a cylindrical section 29 with which it is pressed into the shirt 6 of the valve lifter 1. This cylindrical section 29 is welded to the shirt 6 and, due to its axial length and a predetermined weld depth of a weld seam 28, prevents the penetration of metal particles into the interior of the valve lifter 1.
- the function of the hydraulic valve lash adjuster is not discussed further, since it is already the subject of many published patent applications, for example also the generic publication EP-A-00 30781.
- the bottom 7 has a wall thickness denoted by A, while a wall thickness of the shirt is denoted by B.
- a wall thickness of the web 8 is characterized by C.
- the cylindrical shirt 6 is tapered at its end facing away from the base 7 in such a way that it has a collar 24. This collar 24 has a wall thickness which is denoted by D.
- the letter E stands for an outer diameter of the valve lifter 1, while values for a spring force of the compression spring 15 are identified with the letter F and a cross-sectional area of the hollow piston 11 with a letter G, but these are not shown in the drawing.
- the smallest wall thicknesses A, B, C and D are realized, which lead to a reduction in the total mass of the valve tappet and ultimately to a reduction in the valve actuation forces due to a reduction in the valve spring force.
- the valve lifter 1 has sufficient rigidity.
- valve lifters 1 shown in FIGS. 2 to 5 are clad on their inner side in the region of the base 7 and the cylindrical shirt 6 with cover metal 27, i. H.
- Base metal and cover metal 27 are firmly connected to one another by pressing or rolling.
- the cover metal 27 ensures, in the manner already described, that, in the case of thermochemical treatment processes, for example case hardening or nitrocarburizing, the diffusion elements carbon or carbon and nitrogen only via the functional surfaces, ie. H. can get into the base metal via the outside of the base 7 and the cylindrical shirt 6. Hardening of the valve tappet with the known disadvantages is thereby avoided.
- the valve lifter 1 is made from the steel grade 16 MnCr 5, while the cover metal 27 is a nickel layer and can have a thickness of 0.05 to 0.2 mm.
- the hydraulic lash adjuster is held in the guide sleeve 9, which is connected to a leg 25 via a web 26 , which in turn is attached to the inside of the cylindrical shirt 6.
- the inner element consisting of leg 25, web 26 and guide sleeve 9 is connected to the already hardened valve tappet 1 by a weld seam 28.
- this presupposes that the inner element is used in the soft state, ie uncured.
- the hardened valve tappet 1 and the inner element are caulked to one another, the cover metal 27 functioning as caulking material. In this case it is possible to use both hardened and unhardened inner elements.
- the leg 25 is rolled into a groove in the shirt 6, which is not specified. In this case too, the inner element is used uncured in two ways.
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4328422 | 1993-08-24 | ||
DE4328422 | 1993-08-24 | ||
PCT/EP1994/002680 WO1995006192A1 (de) | 1993-08-24 | 1994-08-11 | Tassenförmiger ventilstössel |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0715681A1 true EP0715681A1 (de) | 1996-06-12 |
EP0715681B1 EP0715681B1 (de) | 1996-12-18 |
Family
ID=6495888
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94924869A Expired - Lifetime EP0715681B1 (de) | 1993-08-24 | 1994-08-11 | Tassenförmiger ventilstössel |
Country Status (6)
Country | Link |
---|---|
US (1) | US5954020A (de) |
EP (1) | EP0715681B1 (de) |
JP (1) | JPH09501753A (de) |
CN (1) | CN1048536C (de) |
DE (2) | DE4428309A1 (de) |
WO (1) | WO1995006192A1 (de) |
Families Citing this family (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19602012A1 (de) * | 1996-01-20 | 1997-07-24 | Schaeffler Waelzlager Kg | Durch einen Nocken einer Brennkraftmaschine betätigter Ventilstößel |
DE19614668A1 (de) * | 1996-04-13 | 1997-10-16 | Schaeffler Waelzlager Kg | Hydraulisches Abstützelement für eine Ventilsteuerung einer Brennkraftmaschine |
JP3814462B2 (ja) * | 2000-05-30 | 2006-08-30 | 株式会社日立製作所 | 内燃機関のバルブリフタ |
DE10106983A1 (de) * | 2001-02-15 | 2002-08-29 | Ina Schaeffler Kg | Stößel |
EP1417406B1 (de) | 2001-08-17 | 2008-10-15 | Continental Automotive GmbH | Aktor als antriebseinheit für einen injektor sowie verfahren zur herstellung des injektors |
US7080614B2 (en) | 2002-05-31 | 2006-07-25 | Ina-Schaeffler Kg | Hydraulically actuated, variable valve drive of an internal combustion engine |
DE10224039A1 (de) * | 2002-05-31 | 2003-12-11 | Ina Schaeffler Kg | Hydraulisch betätigter, variabler Ventiltrieb einer Brennkraftmaschine |
US7273026B2 (en) * | 2002-10-18 | 2007-09-25 | Maclean-Fogg Company | Roller follower body |
DE102005054944A1 (de) * | 2005-11-17 | 2007-05-24 | BSH Bosch und Siemens Hausgeräte GmbH | Wasserführendes Haushaltgerät |
DE102007016740A1 (de) * | 2007-04-07 | 2008-10-09 | Schaeffler Kg | Schaltbarer Tassenstößel |
DE102007051302A1 (de) * | 2007-10-26 | 2009-04-30 | Schaeffler Kg | Hubkolbenbrennkraftmaschine mit Motorbremse und zusätzlichem Öffnen eines Auslassventils |
DE102008062185A1 (de) * | 2008-12-13 | 2010-06-17 | Schaeffler Kg | Schaltbarer Tassenstößel |
WO2010114602A1 (en) * | 2009-03-31 | 2010-10-07 | Sand9, Inc. | Integration of piezoelectric materials with substrates |
DE102009036778A1 (de) * | 2009-08-08 | 2011-02-10 | Schaeffler Technologies Gmbh & Co. Kg | Steuertrieb einer Brennkraftmaschine |
CN102667074B (zh) * | 2009-12-21 | 2015-07-08 | 斗山英维高株式会社 | 改善结构以能够增加极限载重的凸轮从动件 |
US10119607B2 (en) | 2016-04-15 | 2018-11-06 | Koyo Bearings North America Llc | Follower mechanism |
DE102019120812A1 (de) * | 2019-08-01 | 2021-02-04 | Schaeffler Technologies AG & Co. KG | Verfahren zum Herstellen einer Gewindemutter eines Gewindetriebes, insbesondere Kugelgewindemutter eines Kugelgewindetriebes |
DE102019120813A1 (de) * | 2019-08-01 | 2021-02-04 | Schaeffler Technologies AG & Co. KG | Verfahren zum Herstellen einer Gewindemutter eines Gewindetriebes, insbesondere Kugelgewindemutter eines Kugelgewindetriebes |
US11149593B2 (en) | 2019-10-03 | 2021-10-19 | Koyo Bearings North America Llc | Tappet assembly with formed anti-rotation alignment device |
US11143059B2 (en) | 2019-10-03 | 2021-10-12 | Koyo Bearings North America Llc | Tappet assembly with unground outer cup |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3006644A1 (de) * | 1980-02-22 | 1981-09-03 | Motomak Motorenbau, Maschinen- u. Werkzeugfabrik, Konstruktionen GmbH, 8070 Ingolstadt | Ventilstoessel fuer brennkraftmaschinen mit obenliegender nockenwelle |
DE3412153A1 (de) * | 1984-03-31 | 1985-10-10 | Motomak Motorenbau, Maschinen- u. Werkzeugfabrik, Konstruktionen GmbH, 8070 Ingolstadt | Verfahren zum befestigen eines trichterfoermigen fuehrungsteiles in der bohrungswand des tassenfoermigen gehaeuses eines sich selbsttaetig hydraulisch einstellenden ventilstoessels |
DE3412175A1 (de) * | 1984-03-31 | 1985-10-10 | Motomak Motorenbau, Maschinen- u. Werkzeugfabrik, Konstruktionen GmbH, 8070 Ingolstadt | Tassenfoermiges gehaeuse eines sich selbsttaetig hydraulisch einstellenden ventilstoessels fuer brennkraftmaschinen mit obenliegender nockenwelle |
US4702406A (en) * | 1986-10-16 | 1987-10-27 | Carolina Power & Light Company | Forming stable welded joints between dissimilar metals |
DE4005261A1 (de) * | 1990-02-20 | 1991-08-22 | Bayerische Motoren Werke Ag | Tassenstoessel mit einem hydraulischen ventilspiel-ausgleichselement |
DE4102988C1 (de) * | 1991-02-01 | 1992-04-16 | Ina Waelzlager Schaeffler Kg, 8522 Herzogenaurach, De |
-
1994
- 1994-08-10 DE DE4428309A patent/DE4428309A1/de not_active Withdrawn
- 1994-08-11 US US08/765,034 patent/US5954020A/en not_active Expired - Fee Related
- 1994-08-11 EP EP94924869A patent/EP0715681B1/de not_active Expired - Lifetime
- 1994-08-11 WO PCT/EP1994/002680 patent/WO1995006192A1/de active Application Filing
- 1994-08-11 JP JP7507314A patent/JPH09501753A/ja active Pending
- 1994-08-11 CN CN94193081A patent/CN1048536C/zh not_active Expired - Fee Related
- 1994-08-11 DE DE59401357T patent/DE59401357D1/de not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO9506192A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO1995006192A1 (de) | 1995-03-02 |
US5954020A (en) | 1999-09-21 |
CN1129469A (zh) | 1996-08-21 |
DE59401357D1 (de) | 1997-01-30 |
EP0715681B1 (de) | 1996-12-18 |
DE4428309A1 (de) | 1995-03-02 |
CN1048536C (zh) | 2000-01-19 |
JPH09501753A (ja) | 1997-02-18 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0715681B1 (de) | Tassenförmiger ventilstössel | |
EP0494285B1 (de) | Verbindung eines auf fertigmass gefertigten zylinderkörpers | |
EP1882109B1 (de) | Wälzlagerring, insbesondere für hochbeanspruchte wälzlager in flugzeugtriebwerken, sowie verfahren zu dessen herstellung | |
EP2440808B1 (de) | Verfahren zur herstellung einer nockenwelle | |
DE102004009074B3 (de) | Gebauter Mehrfachnocken | |
WO2007016913A2 (de) | Welle mit funktionskörpern, wie nockenwelle für brennkraftmaschinen, verfahren zur herstellung solcher wellen, sowie damit ausgerüstete brennkraftmaschinen | |
DE2838995A1 (de) | Verfahren und vorrichtung zum herstellen und zusammenbauen einer nockenwelle | |
WO2008058836A1 (de) | Hubübertragungsbauteil und verfahren zu dessen herstellung | |
EP0265663A1 (de) | Verfahren zur Herstellung einer gebauten Nockenwelle sowie gebaute Nockenwelle aus einem Wellenrohr und aufgeschobenen Elementen | |
DE4423543C2 (de) | Reibungsarme Nockenwelle | |
DE102008037747A1 (de) | Bimetallventil | |
DE19710847A1 (de) | Zusammengesetzte Steuerwelle und Verfahren für deren Herstellung | |
EP2713018B1 (de) | Nockenwelle für eine Brennkraftmaschine | |
EP1502011B1 (de) | Einstückig ausgebildeter nocken und verfahren zum herstellen des nockens sowie zusammenbau einer steuerwelle oder nockenwelle | |
DE102011007450A1 (de) | Schlepphebel eines Ventiltriebs und Verfahren zu dessen Herstellung | |
DE102013218644A1 (de) | Verfahren zur Herstellung eines Kipphebels und Kipphebel für einen Ventiltrieb einer Brennkraftmaschine | |
DE4325610A1 (de) | Tassenförmiger Ventilstößel | |
DE102007017094A1 (de) | Nocken für eine Nocken- oder Steuerwelle | |
DE4337594C2 (de) | Bolzenbefestigung an Kipp- oder Schlepphebeln | |
DE2063819A1 (de) | Sich selbsttätig hydraulisch einstellendes Spielausgleichselement für die Ventilsteuerung von Brennkraftmaschinen | |
DE4442057B4 (de) | Hydraulische Spielausgleichsvorrichtung | |
AT402656B (de) | Hydraulischer arbeitszylinder hydraulischer arbeitszylinder | |
DE4324835A1 (de) | Lagerbolzen | |
DE102013223571A1 (de) | Ventil für eine Ventilvorrichtung | |
DE10114073A1 (de) | Stößel |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19951123 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE FR GB IT |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
17Q | First examination report despatched |
Effective date: 19960703 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
ITF | It: translation for a ep patent filed |
Owner name: DE DOMINICIS & MAYER S.R.L. |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE FR GB IT |
|
REF | Corresponds to: |
Ref document number: 59401357 Country of ref document: DE Date of ref document: 19970130 |
|
ET | Fr: translation filed | ||
GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 19970312 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20010725 Year of fee payment: 8 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20010820 Year of fee payment: 8 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20010821 Year of fee payment: 8 |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: IF02 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF THE APPLICANT RENOUNCES Effective date: 20020522 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20020811 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20020811 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20030430 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: IT Payment date: 20060831 Year of fee payment: 13 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20070811 |