Patent ID: 7793537
Filing Date: 2010-09-14
Classification: F01M

Abstract:
1. A method to determine engine oil consumption in an internal combustion engine having a fuel system, a cooling system, at least one piston reciprocally moveable within a piston bore, an oil reservoir in fluid communication with said bore and at least one expandable oil ring circumferentially disposed on said piston, and an exhaust system having an inlet in fluid communication with an engine exhaust manifold, and an outlet to exhaust from said engine, fueling the engine during operation for a predetermined period of time to bring the engine oil and coolant temperature to a whole boundary predetermined temperature for a predetermined period of time; ceasing fueling once engine has reached whole boundary condition; motoring the engine on a dynamometer to turn crankshaft at a predetermined range of rpm; measuring hydrocarbon levels at said exhaust outlet for a predetermined period of time to determine engine oil consumption.