METHOD AND DEVICE FOR SEPARATING OIL FROM CRANKCASE BREATHER GASES FROM AN INTERNAL COMBUSTION ENGINE

摘要

The invention relates to a method and device for separating oil from crankcase breather gases from an internal combustion engine, by means of at least one cyclone separator and a device suitable for carrying out said method. The aim of the invention is to improve on the disadvantages of conventional technology to provide an improved degree of separation for all the operating conditions of the engine, characterised by being economical and also a device for carrying out said method. The proposed solution is to divide the blow-by gases collecting in the crankcase (1) into at least two partial streams (T1, T2) before entering the cyclone separator (2), which are then introduced into the cyclone separator (2) in the same direction of rotation. The ratio of the partial streams (T1, T2) to each other is altered by multiple throttling or opening of a first regulation body (10) as follows: a) on throttling the first regulation body (10) one partial stream (T1) is reduced or throttled back thus increasing the speed and amount of the other unthrottled partial stream (T2) in relation to the throttled partial stream (T1), as least when the following conditions occur singly or together, during operation: a1) the pressure difference between the crankcase (1) and injection point for the blow-by gas in the inlet tract increases and the gas flow is constant or reduces, a2) the pressure difference between the crankcase (1) and injection point for the blow-by gas in the inlet tract is constant and the gas flow reduces.