Poppet valve

A poppet valve for a combustion engine has valve body 6 comprising a valve stem 2, a valve head 3 with a valve combustion face 4, and a valve fillet 5 interconnecting the valve stem 2 and the valve head 3, wherein the surface 8 of the fillet 5 has an increased thermal resistance compared to the valv...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	Alberto Aimasso, Luigi Lia, Francesca Mancuso
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES ENGINE PLANTS IN GENERAL HEATING LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING STEAM ENGINES WEAPONS
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Beschreibung
Zusammenfassung:	A poppet valve for a combustion engine has valve body 6 comprising a valve stem 2, a valve head 3 with a valve combustion face 4, and a valve fillet 5 interconnecting the valve stem 2 and the valve head 3, wherein the surface 8 of the fillet 5 has an increased thermal resistance compared to the valve combustion face 4. The fillet surface 8 may have a thermal barrier coating 9, eg deposited by the spray nozzle (22, fig.3) of an atmospheric plasma spraying (APS) system or a high velocity oxygen fuel spraying (HVOF) system while the valve is rotating. The thermal barrier coating may comprise ferrite particles, a silica based inorganic compound, hollow ceramic balls or yttria-stabilised zirconia. The valve body may have a cavity 7 filled with sodium.