Device for cleaning of crankcase gases

US7789076B2 · kind B2 · utility

Assignee

• ALFA LAVAL CORPORATE AB · SE

Inventors

• Leonard Borgstrom · Tyresö, SE
• Claes-Goran Carlsson · Höör, SE
• Hans Moberg · Stockholm, SE
• Jan Skoog · Hagfors, SE
• Carl Häggmark · Täby, SE

Key dates

• Filing date: Nov 21, 2005
• Grant date: Sep 7, 2010
• Expiry date: Jan 31, 2027

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F01M2013/0422
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

This document describes a device for cleaning of crankcase gases from a combustion engine, and a combustion engine having such a device. An inlet conduit is connected to a crankcase of the combustion engine. A centrifugal separator receives a flow of crankcase gases from the crankcase via the inlet conduit and comprises a routable centrifuge rotor for centrifuging the crankcase gases. A drive device drives the centrifuge rotor. An outlet conduit discharges cleaned crankcase gases from the centrifugal separator. The rotary speed of the drive device, and thus the rotary speed of the centrifuge rotor, is controllable depending on the gas pressure in the crankcase. An export conduit may be connected to the inlet conduit and adapted to enable discharge of a flow of crankcase gases from the crankcase by-passing the centrifugal separator depending on the gas pressure in the crankcase. An import conduit may be connected to the inlet conduit and adapted to enable feeding of a flow of air from the surroundings to the crankcase depending on the gas pressure in the crankcase.