DE102007051374A1 - Gas shuttle valve for internal-combustion engine, is formed from lightweight construction material and is provided with coating in sections, where coating is applied by cold gas spraying - Google Patents
Gas shuttle valve for internal-combustion engine, is formed from lightweight construction material and is provided with coating in sections, where coating is applied by cold gas spraying Download PDFInfo
- Publication number
- DE102007051374A1 DE102007051374A1 DE102007051374A DE102007051374A DE102007051374A1 DE 102007051374 A1 DE102007051374 A1 DE 102007051374A1 DE 102007051374 A DE102007051374 A DE 102007051374A DE 102007051374 A DE102007051374 A DE 102007051374A DE 102007051374 A1 DE102007051374 A1 DE 102007051374A1
- Authority
- DE
- Germany
- Prior art keywords
- coating
- gas exchange
- valve
- exchange valve
- gas
- 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.)
- Ceased
Links
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
-
- 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
-
- 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
- F01L2301/00—Using particular materials
-
- 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
- F01L2303/00—Manufacturing of components used in valve arrangements
-
- 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
- F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
- F01L9/20—Valve-gear or valve arrangements actuated non-mechanically by electric means
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
Description
Die Erfindung betrifft ein Gaswechselventil für eine Brennkraftmaschine.The The invention relates to a gas exchange valve for an internal combustion engine.
Ein Gaswechselventil mit einem Ventilschaft und einem Ventilteller kann von einem Antrieb wie einer Nockenwelle oder einem elektromagnetischen Aktuator so betätigt werden, daß das Gaswechselventil aus der geschlossenen Stellung in die geöffnete Stellung wechseln kann. Die auf das Gaswechselventil wirkenden Kräfte sind dabei vergleichsweise hoch.One Gas exchange valve with a valve stem and a valve disk can from a drive such as a camshaft or an electromagnetic actuator so pressed be that Gas exchange valve from the closed position to the open position can change. The forces acting on the gas exchange valve are forces doing comparatively high.
Um einen vorzeitigen Verschleiß des Gaswechselventils zu verhindern, werden Gaswechselventile meist aus einem harten, verschleißfesten Material hergestellt. Solche Gaswechselventile sind jedoch schwer, weshalb beispielsweise ein als Antrieb eingesetzter elektromagnetische Aktuator eine große Kraft aufbringen muß, um das Gaswechselventil aus der geschlossenen in die geöffnete Stellung und umgekehrt zu bewegen. Solche Gaswechselventile können deshalb nur bedingt beispielsweise bei hochdrehenden Verbrennungsmotoren eingesetzt werden.Around a premature wear of the Gas exchange valves are usually gas exchange valves made of a hard, wear-resistant Material produced. However, such gas exchange valves are difficult why, for example, used as a drive electromagnetic Actuator a great force must raise around the gas exchange valve from the closed to the open position and vice versa. Such gas exchange valves can therefore only conditionally, for example, in high-speed internal combustion engines be used.
Die Aufgabe der Erfindung besteht darin, ein Gaswechselventil bereitzustellen, das bei geringen Kosten verschleißgeschützt ist.The The object of the invention is to provide a gas exchange valve, which is wear-resistant at low cost.
Zu diesem Zweck sieht die Erfindung ein Gaswechselventil für eine Brennkraftmaschine vor, wobei das Gaswechselventil aus einem Leichtbauwerkstoff ausgebildet ist und wenigstens abschnittsweise mit einer Beschichtung versehen ist. Aufgrund der Beschichtung kann ein Gaswechselventil, aus einem Leichtbauwerkstoff, wie z. B. Aluminium, Magnesium oder deren Legierungen, verwendet werden, da das vergleichsweise leichte Gaswechselventil aufgrund der Beschichtung vor Verschleiß geschützt ist. Das Gaswechselventil aus einem Leichtbauwerkstoff selbst weist nämlich eine zu geringe Stützfähigkeit auf und ist deshalb nicht verschleißfest. Gaswechselventile in Leichtbauweise können insbesondere für hochdrehende Verbrennungsmotoren und/oder Verbrennungsmotoren mit variablem Ventilantrieb eingesetzt werden, da sie aufgrund ihres niedrigen Gewichtes von Antrieben wie einer Nockenwelle oder einem elektromagnetischen Aktuator mit einer geringen Kraft angetrieben werden können. Das so hergestellte Gaswechselventil ist kostengünstig.To For this purpose, the invention provides a gas exchange valve for an internal combustion engine before, wherein the gas exchange valve formed of a lightweight material is and at least partially provided with a coating is. Due to the coating, a gas exchange valve, from a Lightweight material, such. As aluminum, magnesium or their alloys, be used because the comparatively light gas exchange valve due the coating is protected against wear. The Gas exchange valve made of a lightweight material itself has a too low supportability and is therefore not wear resistant. Gas exchange valves in lightweight construction, especially for high-revving Internal combustion engines and / or variable valve drive internal combustion engines be used because of their low weight of Drives such as a camshaft or an electromagnetic actuator can be driven with a small force. The gas exchange valve produced in this way is inexpensive.
Vorzugsweise ist die Beschichtung mittels Kaltgasspritzen aufgebracht. Kaltgasspritzen ist ein Spritzprozeß, bei dem ungeschmolzene Pulverpartikel beschleunigt werden und mit sehr hoher Geschwindigkeit auf das Gaswechselventil gespritzt werden. Dazu wird ein auf wenige 100° Celsius aufgeheiztes Fördergas durch Expansion auf Überschallgeschwindigkeit beschleunigt. Anschließend werden die Pulverpartikel in den Gasstrahl initiiert. Die initiierten Pulverpartikel werden dabei auf eine so hohe Geschwindigkeit beschleunigt, daß sie im Gegensatz zu anderen thermischen Spritzverfahren auch ohne vorangehendes An- oder Aufschmelzen beim Aufprall auf das Gaswechselventil eine dichte und fest haftende Schicht bilden. Da die Temperatur des Fördergases nur leicht erhöht ist und das aufgespritzte Pulvermaterial in keinem Fall die Schmelztemperatur des Gaswechselventils erreicht, eignet sich das Kaltgasspritzen für Gaswechselventile aus leichten und/oder niedrig schmelzenden Materialien.Preferably the coating is applied by means of cold gas spraying. Cold Spraying is a spraying process, in which unmelted powder particles are accelerated and with be sprayed at very high speed on the gas exchange valve. This will be a few hundred degrees Celsius heated conveying gas by expanding to supersonic speed accelerated. Then be initiated the powder particles in the gas jet. The initiated powder particles are thereby accelerated to such a high speed that they are in the Contrary to other thermal spraying methods without previous Melting or melting on impact with the gas exchange valve form a dense and firmly adhering layer. As the temperature of the delivery gas only slightly increased and the sprayed powder material in no case the melting temperature achieved the gas exchange valve, the cold gas spraying is suitable for gas exchange valves made of light and / or low melting materials.
Es kann der Ventilschaft mit der Beschichtung versehen sein, und zwar insbesondere der Teil des Ventilschaftes, der in einer Ventilführung aufgenommen ist. Der Teil, der in der Ventilführung aufgenommen ist, bewegt sich beim Öffnen und Schließen des Gaswechselventils entlang der Ventilführung. Die Beschichtung verhindert, daß die Bewegung des Ventilschaftes relativ zur Ventilführung zu einem Materialverlust an der Oberfläche des Gaswechselventils führt.It the valve stem can be provided with the coating, namely in particular the part of the valve stem which is received in a valve guide is. The part that is received in the valve guide moves when opening and closing the Gas exchange valve along the valve guide. The coating prevents that the Movement of the valve stem relative to the valve guide to a loss of material on the surface the gas exchange valve leads.
Es kann auch der Endabschnitt des Ventilschaftes, der der Ventilbetätigung zugewandt ist, mit der Beschichtung versehen sein. Herkömmliche Ventilbetätigungen wirken auf den Ventilschaft des Gaswechselventils, um das Gaswechselventil aus einer geschlossenen Stellung in die geöffnete Stellung zu verstellen. Die dabei zwischen der Ventilbetätigung und dem Ventilschaft wirkenden Kräfte am Endabschnitt des Ventilschaftes sind vergleichsweise hoch.It may also be the end portion of the valve stem, which faces the valve actuation is to be provided with the coating. Conventional valve actuations act on the valve stem of the gas exchange valve to the gas exchange valve to move from a closed position to the open position. The case between the valve actuation and forces acting on the valve stem at the end portion of the valve stem are comparatively high.
Die Beschichtung, die am Endabschnitt des Ventilschaftes vorgesehen ist, verhindert einen vorzeitigen Verschleiß.The Coating provided at the end portion of the valve stem is, prevents premature wear.
Auch kann eine Sitzfläche des Ventiltellers mit der Beschichtung versehen sein. Die Sitzfläche des Ventiltellers wirkt mit einem Ventilsitz zusammen. Die Beschichtung schützt die Sitzfläche vor Verschleiß.Also can be a seat the valve disk be provided with the coating. The seat of the Valve plate interacts with a valve seat. The coating protects the seat from wear.
Vorzugsweise ist die Dicke der Beschichtung so gewählt, daß sie selbsttragend ist. Das Grundmaterial, aus dem das Gaswechselventil ist, ist ein Leichtbauwerkstoff mit einer geringen Stützfähigkeit. Aufgrund des geringen Verformungswiderstandes des Gaswechselventils können keine dünnen Beschichtungen verwendet werden. Es ist notwendig, daß die Beschichtung selbsttragend ist, um eine Dauerfestigkeit des Gaswechselventils zu gewährleisten.Preferably the thickness of the coating is chosen so that it is self-supporting. The Base material of which the gas exchange valve is a lightweight material with a low supportability. by virtue of the low deformation resistance of the gas exchange valve can not thin Coatings are used. It is necessary that the coating self-supporting, to a fatigue strength of the gas exchange valve to ensure.
Das Gaswechselventil kann aus Aluminium, Magnesium oder deren Legierungen bestehen, also Materialien, die eine geringe Stützfähigkeit haben, leicht und niedrig schmelzend sind. Aufgrund ihres geringen Gewichtes werden solche Gaswechselventile insbesondere für hochdrehende Verbrennungsmotoren und/oder Verbrennungsmotoren mit variablem Ventilantrieb eingesetzt.The gas exchange valve can be made of aluminum, magnesium or their alloys, ie materials that have low supportability, are light and low melting. Due to their low weight, such Gaswechselven tile used in particular for high-speed internal combustion engines and / or internal combustion engines with variable valve drive.
Weitere Merkmale und Vorteile ergeben sich aus den Unteransprüchen.Further Features and advantages emerge from the dependent claims.
Die
Erfindung wird nachfolgend anhand einer Ausführungsform beschrieben, die
in der einzigen Zeichnung dargestellt ist. In
In
Das
Gaswechselventil
Das
Gaswechselventil
Das
leichte und verschleißgeschützte Gaswechselventil
Das
Gaswechselventil
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007051374A DE102007051374A1 (en) | 2007-10-26 | 2007-10-26 | Gas shuttle valve for internal-combustion engine, is formed from lightweight construction material and is provided with coating in sections, where coating is applied by cold gas spraying |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007051374A DE102007051374A1 (en) | 2007-10-26 | 2007-10-26 | Gas shuttle valve for internal-combustion engine, is formed from lightweight construction material and is provided with coating in sections, where coating is applied by cold gas spraying |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102007051374A1 true DE102007051374A1 (en) | 2009-04-30 |
Family
ID=40490232
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102007051374A Ceased DE102007051374A1 (en) | 2007-10-26 | 2007-10-26 | Gas shuttle valve for internal-combustion engine, is formed from lightweight construction material and is provided with coating in sections, where coating is applied by cold gas spraying |
Country Status (1)
Country | Link |
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DE (1) | DE102007051374A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008054266A1 (en) * | 2008-10-31 | 2010-05-06 | Mahle International Gmbh | Movable, hot gases exposed closure body of a valve |
FR2978065A3 (en) * | 2011-07-22 | 2013-01-25 | Renault Sa | Method for manufacturing e.g. inlet valve seat on cylinder head of heat engine, involves applying coating on contact area of head with valve in closed position by spraying metal, ceramic particles/mixture of metal and ceramic particles |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62139912A (en) * | 1985-12-11 | 1987-06-23 | Toyota Motor Corp | Manufacture of intake/exhaust valve |
EP0859131A1 (en) * | 1997-02-14 | 1998-08-19 | Fuji Oozx Inc. | Poppet valve and method of making it |
EP0864730A1 (en) * | 1997-03-11 | 1998-09-16 | Fuji Oozx Inc. | Inlet valve in an internal combustion engine and a method of manufacturing the same |
EP0911493A2 (en) * | 1997-10-21 | 1999-04-28 | Eaton Corporation | Improved tip structures for an ultra light engine valve |
DE102005018618A1 (en) * | 2005-04-21 | 2006-10-26 | Rheinmetall Waffe Munition Gmbh | Gun barrel and method of coating the inner surface of the barrel |
US20070218303A1 (en) * | 2006-03-20 | 2007-09-20 | Nissan Motor Co., Ltd. | Aluminum alloy-made part |
DE102006014124A1 (en) * | 2006-03-24 | 2007-09-27 | Linde Ag | Cold spray gun |
-
2007
- 2007-10-26 DE DE102007051374A patent/DE102007051374A1/en not_active Ceased
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62139912A (en) * | 1985-12-11 | 1987-06-23 | Toyota Motor Corp | Manufacture of intake/exhaust valve |
EP0859131A1 (en) * | 1997-02-14 | 1998-08-19 | Fuji Oozx Inc. | Poppet valve and method of making it |
EP0864730A1 (en) * | 1997-03-11 | 1998-09-16 | Fuji Oozx Inc. | Inlet valve in an internal combustion engine and a method of manufacturing the same |
EP0911493A2 (en) * | 1997-10-21 | 1999-04-28 | Eaton Corporation | Improved tip structures for an ultra light engine valve |
DE102005018618A1 (en) * | 2005-04-21 | 2006-10-26 | Rheinmetall Waffe Munition Gmbh | Gun barrel and method of coating the inner surface of the barrel |
US20070218303A1 (en) * | 2006-03-20 | 2007-09-20 | Nissan Motor Co., Ltd. | Aluminum alloy-made part |
DE102006014124A1 (en) * | 2006-03-24 | 2007-09-27 | Linde Ag | Cold spray gun |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008054266A1 (en) * | 2008-10-31 | 2010-05-06 | Mahle International Gmbh | Movable, hot gases exposed closure body of a valve |
US8726873B2 (en) | 2008-10-31 | 2014-05-20 | Mahle International Gmbh | Moveable valve sealing body exposed to hot gases |
FR2978065A3 (en) * | 2011-07-22 | 2013-01-25 | Renault Sa | Method for manufacturing e.g. inlet valve seat on cylinder head of heat engine, involves applying coating on contact area of head with valve in closed position by spraying metal, ceramic particles/mixture of metal and ceramic particles |
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OM8 | Search report available as to paragraph 43 lit. 1 sentence 1 patent law | ||
8110 | Request for examination paragraph 44 | ||
R079 | Amendment of ipc main class |
Free format text: PREVIOUS MAIN CLASS: F01L0003020000 Ipc: F01L0003040000 |
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R079 | Amendment of ipc main class |
Free format text: PREVIOUS MAIN CLASS: F01L0003020000 Ipc: F01L0003040000 Effective date: 20130115 |
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R016 | Response to examination communication | ||
R002 | Refusal decision in examination/registration proceedings | ||
R003 | Refusal decision now final |
Effective date: 20130530 |