Motor vehicle engine oil quality determination method based on a determination of its viscosity from dynamic measurements of the oil level and one or more vehicle kinematic measurements

摘要

Device for determining an operating fluid viscosity for a motor vehicle or other moving machine, especially for determining the oil quality of a combustion engine. The device has an evaluation unit for determining the oil viscosity dependent on a first sensor signal that indicates the oil level (FS) and at least one other kinematic sensor signal (nRAD, aQUER, vGIER, vLANGS). An Independent claim is made for a method for determining the viscosity of the oil of a motor vehicle combustion engine. The inventive method and device are based on the fact that the sloshing behavior of the engine oil is dependent on its viscosity and therefore quality. The swashing behavior is determined by monitoring the dynamic oil level in conjunction with the vehicle behavior.