A METHOD AND A DEVICE FOR CLEANING OF CRANKCASE GASES COMING FROM AN INTERNAL COMBUSTION ENGINE ADAPTED FOR PROPELLING A MEANS OF TRANSPORTATION

摘要

In a vehicle (1) adapted to be propelled by means of an internal com-bustion engine (2) crankcase gases coming from the combustion engine are cleaned by means of a centrifugal separator (11). The rotor of the centrifugal separator (11) is driven by means of pressurized air delivered by a compressor (4), e.g. a so called turbo compressor, which is driven by means of the combustion engine. During periods when the com-pressor (4) delivers pressurized air in an insufficient amount and/or at insufficient pressure the rotor of the centrifugal separator (11) is instead driven by means of pressurized air coming from a container (9) containing so called auxiliary pressurized air. The auxiliary pressurized air may have a substantially larger pressure than the pressurized air normally delivered by the compressor (4). The combustion engine (2) is used also for accomplishing the overpressure of the auxiliary pressurized air in the container (9).