PISTON COMPRESSION RINGS OF COPPER-NICKEL-TIN ALLOYS

A piston ring is made from a copper-containing alloy. This material permits the top compression ring of a piston to be moved closer to the piston crown, reducing crevice volume and reducing the tendency for pre-ignition. Ignition timing advance can be realized by installing the rings and letting the...

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Bibliographische Detailangaben
Hauptverfasser:	KRUS, David J, WHITAKER, Andrew J, MACK, Steffen
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ALLOYS ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES BLASTING CHEMISTRY COMBUSTION ENGINES CYLINDERS CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES ENGINE PLANTS IN GENERAL ENGINEERING ELEMENTS AND UNITS FERROUS OR NON-FERROUS ALLOYS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING METALLURGY PISTONS ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES SEALINGS STEAM ENGINES THERMAL INSULATION IN GENERAL TREATMENT OF ALLOYS OR NON-FERROUS METALS WEAPONS
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Beschreibung
Zusammenfassung:	A piston ring is made from a copper-containing alloy. This material permits the top compression ring of a piston to be moved closer to the piston crown, reducing crevice volume and reducing the tendency for pre-ignition. Ignition timing advance can be realized by installing the rings and letting the ECU advance the timing as the sensors allow, increasing efficiency. Also, shorter pistons and longer connecting rods are possible. The shorter pistons reduces the reciprocated mass in the engine and the longer connecting rods reduce the frictional loss caused by radial forces pushing the piston against the liner. Both reducing volume and tendency for pre-ignition increase engine efficiency.