Viscosity detection using starter motor

Various methods for inferring oil viscosity and/or oil viscosity index in an internal combustion engine are provided. In one example, a new control method comprises cranking the engine during a start mode with an electric motor connected to a substantially constant source of electrical power, inferr...

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Bibliographische Detailangaben
Hauptverfasser:	LEONE THOMAS G, GIBSON ALEXANDER O'CONNOR
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING COMBUSTION ENGINES CONTROLLING COMBUSTION ENGINES CRANKCASE VENTILATING ENGINE PLANTS IN GENERAL HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS LIGHTING LUBRICATING INTERNAL COMBUSTION ENGINES LUBRICATING OF MACHINES OR ENGINES IN GENERAL MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDEDFOR STARTING OF COMBUSTION ENGINES STEAM ENGINES WEAPONS
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Beschreibung
Zusammenfassung:	Various methods for inferring oil viscosity and/or oil viscosity index in an internal combustion engine are provided. In one example, a new control method comprises cranking the engine during a start mode with an electric motor connected to a substantially constant source of electrical power, inferring engine oil viscosity based at least on engine oil temperature and speed of the engine while being cranked by the electric motor during the start mode, and correcting an operating parameter of the engine based on the inferred engine oil viscosity.