Phase controlling system for two rotatable shafts

A valve timing device for an internal combustion engine includes a hub with an internal helical groove which engages a tracking post extending from a cylindrical surface of a crankshaft. A locking cap is placed at the outer end of the crankshaft spaced apart from the hub with a compression spring wr...

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Bibliographische Detailangaben
Hauptverfasser:	NATKIN, ROBERT J
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING BRAKES CLUTCHES COUPLINGS FOR TRANSMITTING ROTATION CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES ENGINE PLANTS IN GENERAL ENGINEERING ELEMENTS AND UNITS GEARING GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS HEATING LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING STEAM ENGINES TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION TECHNICAL SUBJECTS COVERED BY FORMER USPC TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS THERMAL INSULATION IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	A valve timing device for an internal combustion engine includes a hub with an internal helical groove which engages a tracking post extending from a cylindrical surface of a crankshaft. A locking cap is placed at the outer end of the crankshaft spaced apart from the hub with a compression spring wrapped about the crankshaft between the hub and the locking cap. A sprocket is keyed onto the hub and trained about a chain which is drivingly trained about a conventional camshaft. As the crankshaft speed is increased, inertial loads of the camshaft causes the sprocket and hub to rotate relative to the crankshaft which axially moves the hub a predetermined amount along the crankshaft to compress the spring until the resilient forces of the spring counterbalances the inertia forces of the camshaft. As the hub is angularly positioned, the camshaft becomes angularly retarded relative to the crankshaft such that the valve operation is delayed with respect to the piston operation as the engine speed increases.