METHOD FOR FUNCTIONAL DIAGNOSIS OF A SEPARATOR

摘要

The present invention relates to a method for functional diagnosis of a separator for separating oil present in a blow-by gas from a crankcase in a combustion engine. The crankcase comprises a crankcase pressure sensor, and is in fluid communication with the separator. The method comprises the steps of; detecting a first output signal of said crankcase pressure sensor at a first operational point or interval; comparing said first output signal of said crankcase pressure sensor with at least one reference value or signal; wherein the comparison between said first output signal of said crankcase pressure sensor and said at least one reference value or signal provides said functional diagnosis of said separator. The present invention provides a method which can perform a functional diagnosis without the use of additional sensors or complex algorithms, as a consequence is manufacturing costs are held at a minimum.