Method for detecting the quality of the engine oil in a diesel engine and corresponding detection system

摘要

A method for detecting the quality of engine oil (13) in an internal combustion engine (10), that comprises measuring at least the viscosity and the temperature (T) of the engine oil (13). According to the invention, such method comprises estimating (M2) an aging (A) of the engine oil (13) based on measured viscosity values (½ m ),
evaluating (340) whether the estimated aging (A) of the engine oil is indicative of dilution of the engine oil,
if so applying (363) a dilution estimation model (M1) to calculate the dilution based on said measured viscosity values (½ m ).