THERMAL SPRAY COATED ENGINE VALVE FOR INCREASED WEAR RESISTANCE

A valve for use in an internal combustion engine is disclosed. The valve includes a stem connected to a fillet disposed between the stem and a seat face. A port receives the stem and accommodates a seat insert that engages the seat face when the valve is in a closed position. The seat insert is fabr...

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Bibliographische Detailangaben
Hauptverfasser:	VELIZ, MARK D, SORDELET, DANIEL J, BEARDSLEY, M. BRAD, RACEK, ONDREJ
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL BLASTING CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES DIFFUSION TREATMENT OF METALLIC MATERIAL ENGINE PLANTS IN GENERAL HEATING INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING METALLURGY PERFORMING OPERATIONS PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL SPRAYING OR ATOMISING IN GENERAL STEAM ENGINES SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	A valve for use in an internal combustion engine is disclosed. The valve includes a stem connected to a fillet disposed between the stem and a seat face. A port receives the stem and accommodates a seat insert that engages the seat face when the valve is in a closed position. The seat insert is fabricated from a non-cobalt-based alloy or an iron-based alloy and the seat face is coated with a cobalt-based alloy or a nickel-based alloy. The coating may be applied using a thermal spray process, such as HVOF. La présente invention se rapporte à une soupape destinée à être utilisée dans un moteur à combustion interne. La soupape comprend une tige raccordée à un bourrelet disposé entre la tige et une face de siège. Un orifice reçoit la tige et contient un insert de siège qui vient en prise avec la face de siège lorsque la soupape se trouve en position fermée. L'insert de siège est fabriqué en un alliage qui ne contient pas de cobalt ou en un alliage à base de fer, et la face de siège est recouverte avec un alliage à base de cobalt ou un alliage à base de nickel. Le revêtement peut être appliqué à l'aide d'un procédé de pulvérisation thermique tel qu'une projection d'oxygaz à haute vitesse.