EP2182183A1 - Corps de fermeture d'une soupape amovible et exposé à des gaz chauds - Google Patents
Corps de fermeture d'une soupape amovible et exposé à des gaz chauds Download PDFInfo
- Publication number
- EP2182183A1 EP2182183A1 EP09172918A EP09172918A EP2182183A1 EP 2182183 A1 EP2182183 A1 EP 2182183A1 EP 09172918 A EP09172918 A EP 09172918A EP 09172918 A EP09172918 A EP 09172918A EP 2182183 A1 EP2182183 A1 EP 2182183A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- spraying
- closure body
- flame
- valve
- body according
- 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
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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
- F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
- F01L3/02—Selecting particular materials for valve-members or valve-seats; Valve-members or valve-seats composed of two or more materials
- F01L3/04—Coated valve members or valve-seats
Definitions
- the invention relates to a movable, hot gases exposed closure body of a valve, in particular a gas exchange valve of an internal combustion engine according to the preamble of patent claim 1.
- closure bodies of gas exchange valves of an internal combustion engine it is known to form the closure body at least in partial areas of the acted upon by the hot combustion gases surface of an inner, provided externally with an insulating material base material.
- a generic closure body is for example from the DE 367 003 A1 in which a valve disk is covered by a layer of good heat-conducting metal.
- the cross-section of the coating is thin in the middle of the valve disk, corresponding to a high heat gradient, and becomes thicker towards the edge, so that the heat to be dissipated can always be provided with a necessary flow cross-section.
- the present invention is concerned with the problem of providing for a generic closure body, an improved or at least another embodiment, which is characterized in particular by a uniform heat distribution during operation and ease of manufacture.
- the invention is based on the general idea of applying a metallic coating, which has hitherto already been known for sealing bodies, to a higher material thermal conductivity by means of a thermal spraying process on the body, that is to say on a first material, wherein between the first and the second Material no thermal insulation is provided, so that the good heat-conducting second material can dissipate the heat both in an edge region of a valve disk of the closure body and from this edge region in a valve seat, as well as in a valve body itself, so that it can heat relatively evenly , without resulting in high and heavily loaded temperature gradients.
- thermal spraying processes Under a thermal spraying process usually surface coating methods are subsumed in which filler materials, the so-called spray additives, inside or outside a spray burner off, on or melted accelerated in a gas stream in the form of spray particles and are thrown onto the surface of the material to be coated.
- the surface to be coated is not melted and only thermally loaded to a very small extent.
- a layer formation takes place here, provided that the spray particles flatten more or less depending on process and material when hitting the surface, remain liable primarily by mechanical interlocking and build up the sprayed layer in layers.
- Particularly advantageous in such thermal spraying processes is the low porosity of the sprayed layers, the good bonding of the same to a base material, freedom from cracks and a relatively homogeneous microstructure.
- the achieved coating properties can be determined decisively by the temperature and the speed of the spray particles at the time of their impact on the surface to be coated.
- As an energy source for the on or melting of the spray additive used for example electric arc, plasma jets, laser beams or preheated gases (eg cold gas spraying, HVOF).
- HVOF cold gas spraying
- the second material in a hot Exhaust gases on the most exposed surface area of the closure body brought to a maximum directly to the sealing region of the closure body and thereby able to derive the high component temperatures occurring during operation of the engine on the one hand quickly into the valve seat and on the other hand to achieve a comparatively uniform heating of the valve body.
- the second, highly thermally conductive material extends in particular to those areas in which the closure body contacts the valve seat when the valve is closed. At a direct contact point between the valve body and the valve seat, however, preferably no second material is provided, since this often has only a moderate wear resistance due to its high thermal conductivity and would wear out especially in this area.
- the first material of the closure body that is to say the base material, is selected primarily according to strength considerations.
- the second material is applied by means of cold gas spraying on the closure body.
- cold gas spraying a coating material in powder form is applied to the carrier material (substrate) at very high speed, for which purpose a process gas heated to a few hundred degrees C. is accelerated to supersonic speed by expansion in a Laval nozzle and then the powder articles are injected into the gas jet.
- These injected spray particles are thereby accelerated to such a high speed that, in contrast to other thermal spraying methods, they form a density and at the same time a firmly adhering layer upon impact with the substrate, even without prior melting or melting.
- the cold gas spraying a cost-effective and highly adhesive surface coating can be achieved.
- Each valve of an internal combustion engine shown has a first material 1 serving as a base material and a second material 2 having a comparatively higher thermal conductivity exposed to the hot combustion gases of a combustion chamber of the internal combustion engine.
- the second material 2 with respect to the first material 1 higher Thermal conductivity extends radially outward to a maximum directly to that area approaching, in which the valve plate rests against the valve seat associated with it when the valve is closed.
- Such a valve seat is not drawn for clarity. As shown, the maximum radial extent of the second material 2 is drawn.
- the second material 2 may protrude with the higher thermal conductivity over the radially outer edges of the valve disk in the direction of the valve stem, although that portion of the valve disk which contacts the valve seat directly, should remain recessed for wear reasons.
- the second material 2 is applied by means of a thermal spraying process.
- a thermal spraying method can be, for example, a molten bath spraying, an arc spraying, a plasma spraying, a flame spraying, a detonation spraying, a cold gas spraying or a laser spraying.
- cold gas spraying in which the second material 2, that is to say the coating material, is applied in powder form at very high speed to the first material 1, that is to say the carrier material.
- a heated to a few hundred degrees ° C process gas for example nitrogen or other inert gas
- a Laval nozzle to supersonic speed and then injected the powder particles in the gas jet, whereupon they are so much accelerated that, in contrast to other thermal spraying Even without previous on or melting on impact with the first material form a dense and firmly adhering layer.
- An alternative thermal spraying method is, for example, plasma spraying, in which an anode and up to three cathodes are separated by a narrow gap at a plasma torch.
- a DC voltage is here generates an arc between the anode and cathode, wherein the gas flowing through the plasma torch is passed through the arc and thereby ionized.
- the dissociation, or subsequent ionization generates a highly heated, electrically conductive gas of positive ions and electrons, in which the coating material, in this case the second material 2, is injected and immediately melted by the high plasma temperature.
- the plasma gas stream thereby entrains the coating material and throws it onto the first material 1.
- an adhesive base may be arranged therebetween, which has, for example, aluminum and / or nickel.
- the primer or the adhesive layer may be up to 100 microns thick, as well as, for example, a corrosion protection layer, with which the second material 2 is coated.
- a corrosion protection layer may in particular comprise nickel.
- the second material 2 is usually made of good heat conducting material, such as copper with a purity of greater than 99% or silver.
- the layer thickness of the second material 2 is between 0.2 and 1.0 mm.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Coating By Spraying Or Casting (AREA)
- Lift Valve (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008054266A DE102008054266A1 (de) | 2008-10-31 | 2008-10-31 | Beweglicher, heißen Gasen ausgesetzter Verschlusskörper eines Ventiles |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2182183A1 true EP2182183A1 (fr) | 2010-05-05 |
EP2182183B1 EP2182183B1 (fr) | 2016-12-14 |
Family
ID=41615723
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09172918.6A Not-in-force EP2182183B1 (fr) | 2008-10-31 | 2009-10-13 | Corps de fermeture d'une soupape amovible et exposé à des gaz chauds |
Country Status (4)
Country | Link |
---|---|
US (1) | US8726873B2 (fr) |
EP (1) | EP2182183B1 (fr) |
JP (1) | JP5627872B2 (fr) |
DE (1) | DE102008054266A1 (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012216929A1 (de) | 2012-09-20 | 2014-03-20 | Mahle International Gmbh | Motorkomponente einer Brennkraftmaschine |
CN106222599B (zh) * | 2016-09-12 | 2019-01-01 | 武汉理工大学 | 采用喷涂自熔性合金结合中频感应加热生产阀门耐磨密封面的复合工艺 |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011090203A1 (de) * | 2011-12-30 | 2013-07-04 | Continental Automotive Gmbh | Design eines Ventil-Schließkörpers |
JP6143048B2 (ja) * | 2012-09-24 | 2017-06-07 | 三菱重工業株式会社 | エンジンバルブ |
WO2014155667A1 (fr) * | 2013-03-29 | 2014-10-02 | 日鍛バルブ株式会社 | Soupape champignon creuse |
JP6291175B2 (ja) * | 2013-07-05 | 2018-03-14 | 株式会社リケン | バルブシート及びその製造方法 |
DK177960B1 (en) | 2014-04-08 | 2015-02-02 | Man Diesel & Turbo Deutschland | An exhaust valve for an internal combustion engine |
JP6868265B2 (ja) * | 2016-12-14 | 2021-05-12 | 株式会社フジキン | 制御弁 |
CN112430811B (zh) * | 2020-11-23 | 2022-02-25 | 浙江大学 | 一种铜基体表面激光熔覆铜合金粉末的方法 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE367003C (de) | 1923-01-15 | Georg Bergmann Dr Ing | Kuehlvorrichtung fuer Ventile von Verbrennungskraftmaschinen | |
EP0864730A1 (fr) * | 1997-03-11 | 1998-09-16 | Fuji Oozx Inc. | Soupape d'admission pour moteur à combustion interne et sa méthode de fabrication |
EP1353045A2 (fr) * | 2002-04-12 | 2003-10-15 | Fuji Oozx Inc. | Soupape |
EP1497538B1 (fr) * | 2002-04-20 | 2005-08-17 | MAHLE Ventiltrieb GmbH | Corps de fermeture mobile d'une soupape, expose a des gaz chauds |
DE102007052800B3 (de) * | 2007-11-02 | 2009-05-07 | Märkisches Werk GmbH | Ein- oder Auslassventil für einen Verbrennungsmotor sowie Verfahren zu dessen Herstellung |
Family Cites Families (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1784640A (en) * | 1927-09-15 | 1930-12-09 | Noble Warren | Poppet valve |
US2893349A (en) * | 1953-11-27 | 1959-07-07 | Gen Motors Corp | Apparatus for removing excess coating from a poppet valve |
US2881750A (en) * | 1956-03-29 | 1959-04-14 | Gen Motors Corp | Valve |
US4554898A (en) * | 1980-10-31 | 1985-11-26 | Nippon Kokan Kabushiki Kaisha | Exhaust valve for diesel engine and production thereof |
JPS63150405A (ja) | 1986-12-16 | 1988-06-23 | Yamaha Motor Co Ltd | 内燃機関のバルブ |
DE3719077A1 (de) * | 1987-06-06 | 1988-12-22 | Daimler Benz Ag | Beschichtetes ventil fuer verbrennungsmotoren |
JPH0196407A (ja) | 1987-10-06 | 1989-04-14 | Sumitomo Metal Ind Ltd | チタン合金製エンジンバルブ |
JPH03129764U (fr) | 1990-04-11 | 1991-12-26 | ||
JPH04311611A (ja) | 1991-04-09 | 1992-11-04 | Aisan Ind Co Ltd | セラミックコーティングエンジンバルブ |
US5543029A (en) * | 1994-04-29 | 1996-08-06 | Fuji Oozx Inc. | Properties of the surface of a titanium alloy engine valve |
JP3013831U (ja) * | 1994-07-27 | 1995-07-25 | アークテクノ株式会社 | 基材の被覆構造 |
JP3186480B2 (ja) * | 1994-12-21 | 2001-07-11 | 大日本塗料株式会社 | 金属溶射皮膜の形成方法 |
US6017591A (en) * | 1996-11-14 | 2000-01-25 | Ford Global Technologies, Inc. | Method of making adherently sprayed valve seats |
DE10055109A1 (de) * | 2000-11-07 | 2002-05-08 | Daimler Chrysler Ag | Ventil für Hubkolbenmaschine und Verfahren zu seiner Herstellung |
JP4628578B2 (ja) * | 2001-04-12 | 2011-02-09 | トーカロ株式会社 | 低温溶射皮膜被覆部材およびその製造方法 |
JP2003278597A (ja) | 2002-03-20 | 2003-10-02 | Mitsubishi Heavy Ind Ltd | エンジン部材、排気弁、ピストンクラウン、及び内燃機関型エンジン |
JP4311611B2 (ja) | 2002-07-12 | 2009-08-12 | 大日精化工業株式会社 | 顔料分散剤およびこれを含んだ顔料組成物 |
US20060093736A1 (en) * | 2004-10-29 | 2006-05-04 | Derek Raybould | Aluminum articles with wear-resistant coatings and methods for applying the coatings onto the articles |
US7562647B2 (en) * | 2006-03-29 | 2009-07-21 | High Performance Coatings, Inc. | Inlet valve having high temperature coating and internal combustion engines incorporating same |
DE102006053550A1 (de) * | 2006-11-14 | 2008-05-15 | Man Diesel Se | Brennkraftmaschine sowie Gaswechselventil einer Brennkraftmaschine |
JP3129764U (ja) | 2006-11-14 | 2007-03-08 | 洋一郎 山野邉 | 低圧室の除菌及び殺菌装置 |
DE102007051374A1 (de) * | 2007-10-26 | 2009-04-30 | Trw Automotive Gmbh | Gaswechselventil für eine Brennkraftmaschine |
-
2008
- 2008-10-31 DE DE102008054266A patent/DE102008054266A1/de not_active Withdrawn
-
2009
- 2009-10-13 EP EP09172918.6A patent/EP2182183B1/fr not_active Not-in-force
- 2009-10-30 US US12/609,593 patent/US8726873B2/en active Active
- 2009-11-02 JP JP2009252082A patent/JP5627872B2/ja not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE367003C (de) | 1923-01-15 | Georg Bergmann Dr Ing | Kuehlvorrichtung fuer Ventile von Verbrennungskraftmaschinen | |
EP0864730A1 (fr) * | 1997-03-11 | 1998-09-16 | Fuji Oozx Inc. | Soupape d'admission pour moteur à combustion interne et sa méthode de fabrication |
EP1353045A2 (fr) * | 2002-04-12 | 2003-10-15 | Fuji Oozx Inc. | Soupape |
EP1497538B1 (fr) * | 2002-04-20 | 2005-08-17 | MAHLE Ventiltrieb GmbH | Corps de fermeture mobile d'une soupape, expose a des gaz chauds |
DE102007052800B3 (de) * | 2007-11-02 | 2009-05-07 | Märkisches Werk GmbH | Ein- oder Auslassventil für einen Verbrennungsmotor sowie Verfahren zu dessen Herstellung |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012216929A1 (de) | 2012-09-20 | 2014-03-20 | Mahle International Gmbh | Motorkomponente einer Brennkraftmaschine |
DE102012216929B4 (de) | 2012-09-20 | 2022-05-25 | Mahle International Gmbh | Motorkomponente einer Brennkraftmaschine |
CN106222599B (zh) * | 2016-09-12 | 2019-01-01 | 武汉理工大学 | 采用喷涂自熔性合金结合中频感应加热生产阀门耐磨密封面的复合工艺 |
Also Published As
Publication number | Publication date |
---|---|
DE102008054266A1 (de) | 2010-05-06 |
JP5627872B2 (ja) | 2014-11-19 |
US8726873B2 (en) | 2014-05-20 |
JP2010106842A (ja) | 2010-05-13 |
US20100108012A1 (en) | 2010-05-06 |
EP2182183B1 (fr) | 2016-12-14 |
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