Method and a device for cleaning of crankcase gas

US7152589B2 · kind B2 · utility

Assignee

• ALFA LAVAL CORPORATE AB · SE

Inventors

• Mats Ekeroth · Landskrona, SE
• Claes-Goran Carlsson · Höör, SE
• Rolf Ridderstrale · Stockholm, SE
• Jan Skoog · Hagfors, SE
• Göran Ström · Lund, SE
• Claes Wase · Tullinge, SE

Key dates

• Filing date: Jun 17, 2003
• Grant date: Dec 26, 2006
• Expiry date: Jun 17, 2023

Classification

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

Abstract

Upon cleaning of crankcase gas generated during operation of an internal combustion engine in its crankcase, a centrifugal separator is used, which includes a rotor arranged for rotation by means of a driving motor and arranged by its rotation suck crankcase gas from the crankcase through a conduit to the centrifugal separator. During operation of the combustion engine a parameter, e.g. a measurement of the load on the combustion engine is sensed, the magnitude of said parameter being related to the amount of crankcase gas generated per unit of time in the crankcase. Depending upon a sensed change of the sensed parameter the rotational speed of the rotor of the centrifugal separator is changed in a way such that the gas pressure in the crankcase is maintained at a predetermined value, or within a predetermined pressure interval, during the operation of the combustion engine.