Method and a device for cleaning of crankcase gases coming from an internal combustion engine adapted for propelling a means of transportation

US7052529B2 · kind B2 · utility

Assignee

• ALFA LAVAL CORPORATE AB · SE

Inventors

• Peter Franzen · Tullinge, SE
• Ingvar Hallgren · Stockholm, SE
• Leif Larsson · Tumba, SE

Key dates

• Filing date: Oct 31, 2001
• Grant date: May 30, 2006
• Expiry date: Apr 23, 2022

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S55/19
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

In a vehicle adapted to be propelled by means of an internal combustion engine crankcase gases coming from the combustion engine are cleaned by means of a centrifugal separator. The rotor of the centrifugal separator is driven by means of pressurized air delivered by a compressor, e.g. a so called turbo compressor, which is driven by means of the combustion engine. During periods when the compressor delivers pressurized air in an insufficient amount and/or at insufficient pressure the rotor of the centrifugal separator is instead driven by means of pressurized air coming from a container 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. The combustion engine is used also for accomplishing the overpressure of the auxiliary pressurized air in the container.