AUTOMATIC ENGINE OIL CHANGE INDICATOR SYSTEM

G-1,099; C-4032 AUTOMATIC ENGINE OIL CHANGE INDICATOR SYSTEM An apparatus and method is disclosed for indicating useful life of motor vehicle engine oil during engine operation based on engine oil temperature without direct measurement thereof. Following the initiation of engine operation, engine oi...

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Bibliographische Detailangaben
Hauptverfasser:	KEERSMAEKERS, JOHN D, SCHWARTZ, ELLEN S, SMOLENSKI, DONALD J, TRAYLOR, CHRISTINE M, WALLO, GARY J
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING ORSUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES INGENERAL ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDEDFOR ELSEWHERE BLASTING CHECKING-DEVICES CRANKCASE VENTILATING ENGINE PLANTS IN GENERAL ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS GENERATING RANDOM NUMBERS HEATING LIGHTING LUBRICATING LUBRICATING INTERNAL COMBUSTION ENGINES LUBRICATING OF MACHINES OR ENGINES IN GENERAL MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING PERFORMING OPERATIONS PHYSICS REGISTERING OR INDICATING THE WORKING OF MACHINES STEAM ENGINES THERMAL INSULATION IN GENERAL TIME OR ATTENDANCE REGISTERS TRANSPORTING VEHICLES IN GENERAL VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISEPROVIDED FOR VOTING OR LOTTERY APPARATUS WEAPONS
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Beschreibung
Zusammenfassung:	G-1,099; C-4032 AUTOMATIC ENGINE OIL CHANGE INDICATOR SYSTEM An apparatus and method is disclosed for indicating useful life of motor vehicle engine oil during engine operation based on engine oil temperature without direct measurement thereof. Following the initiation of engine operation, engine oil temperature is calculated from a warmup equation until calculated engine oil temperature exceeds a warmup reference, whereupon it is calculated from an equilibrium equation, both of which equations being linear combinations of engine operating parameters other than engine oil temperature itself. The warmup equation includes a constant term, a reference temperature term fixed at the beginning of engine operation and a term increasing proportionally with the number of engine cylinder firings. The equilibrium equation includes a constant term, an engine temperature term and a term proportional to engine speed and may also include a term proportional to an engine cooling factor.