Patent ID: 9031768
Filing Date: 2015-05-12
Classification: B01D,F01M

Abstract:
1. Method for functional diagnosis of a separator for separating oil present in a blow-by gas from a crankcase in a combustion engine, the separator comprising a plurality of rotating discs, the crankcase comprising a crankcase pressure sensor, and being in fluid communication with the separator, the method comprising: providing a first output signal of the crankcase pressure sensor, the first output signal being indirectly proportional to the rotational velocity of the rotating discs of the separator; detecting the first output signal of the crankcase pressure sensor at a first operational point or interval; and comparing the first output signal of the crankcase pressure sensor with at least one reference value or signal; diagnosing insufficient rotation of the rotating discs of the separator when a difference between the first output signal of the crankcase pressure sensor and the at least one reference value or signal identified through the comparison is below a difference for a properly functioning separator.