Device for separation of oil, ventilation system, cylinder head cover and internal combustion engine

Abstract

A device for separation of oil droplets and/or oil mist from blow-by gases of an internal combustion engine. Also described is a ventilation system for ventilation of the crankcase of an internal combustion engine, a cylinder head cover and an internal combustion engine, which contain such a device.

1 - 16 . (canceled) 
     
     
         17 . A device for separation of oil droplets and/or oil mist from blow-by gases of an internal combustion engine, having a valve for control of the gas flow from a pressure side to a suction side of the device, the valve having at least one base plate, comprising:
 at least one first region of the at least one base plate, there being disposed in each of the first regions at least one first gas passage opening for passage of gas from the pressure side to the suction side of the base plate and also, on the pressure side of the at least one base plate, and at least one first valve closure for pressure-side closure of the at least one first gas passage opening.   
     
     
         18 . The device according to  claim 17 , wherein the first valve closure of each of the first regions has a pretension such that it closes the first gas passage openings overlapped by it when the low pressure of the suction side relative to the pressure side exceeds a predetermined low pressure in magnitude. 
     
     
         19 . The device according to  claim 17 , wherein at least two first regions of the at least one base plate, wherein the predetermined threshold values of the valve closure of at least two of the at least two first regions are different from each other. 
     
     
         20 . The device according to  claim 17 , further comprising a second region of the at least one base plate, which is disposed adjacent to the side of the first region, and in which at least one second unclosable gas passage opening for passage of gas from the pressure side to the suction side of the valve is disposed. 
     
     
         21 . The device according to  claim 17 , wherein at least one of the first valve closure has a first resilient tongue which is disposed on the pressure side of the base plate. 
     
     
         22 . The device according to  claim 21 , wherein at least one of the first resilient tongues is attached resiliently to the base plate via at least one retaining arm such that it is movable between a first position, in which it uncovers the first gas passage openings overlapped by it, and a second position, in which it closes the first gas passage openings overlapped by it. 
     
     
         23 . The device according to  claim 22 , wherein the retaining arm has, between its attachment to the base plate and the region of the resilient tongue overlapping the gas passage opening, at least two bends which are opposite each other. 
     
     
         24 . The device according to  claim 21 , wherein at least one of the first resilient tongues is configured such that at least one of the first gas passage openings overlapped by it is unclosable by the first resilient tongue. 
     
     
         25 . The device according to  claim 21 , wherein at least one of the first gas passage openings on the pressure side of the base plate has an edge which protrudes in a web-shape from the base plate and extends circumferentially about the first gas passage opening as support for the first resilient tongue covering the first gas passage opening. 
     
     
         26 . The device according to  claim 25 , wherein the circumferential edge is circumferentially the same height or is flattened in the direction of the mounting of the first resilient tongue or has an additional sealing element which extends circumferentially on the edge. 
     
     
         27 . The device according to  claim 21 , wherein at least one of the first resilient tongues has an embossing which extends circumferentially about at least one of the first gas passage openings. 
     
     
         28 . The device according to  claim 27 , wherein the at least one embossing is a bead-shaped embossing or a circumferential sealing element. 
     
     
         29 . The device according to  claim 17 , wherein at least one of the at least one first gas passage openings has a narrowed cross-section which acts as oil separator element. 
     
     
         30 . The device according to  claim 17 , wherein in at least one of the at least one first gas passage openings, there is disposed a flow-deflection- and -guiding element as oil separator element, in particular a helix-shaped element. 
     
     
         31 . The device according to  claim 30 , wherein the oil separator element is a helix-shaped element. 
     
     
         32 . A ventilation system for ventilation of the crankcase of an internal combustion engine comprising:
 an intake duct with a compressor and a throttle valve, having an oil separator with a gas input chamber and at least two separate gas output chambers connected thereto,   a first ventilation pipe for connecting the crankcase of the internal combustion engine and the gas input chamber of the oil separator,   a first output pipe for connecting the first gas output chamber to the intake duct of the internal combustion engine before the compressor, and a second output pipe for connecting the second output chamber to the intake duct of the internal combustion engine behind the throttle valve,   wherein in the second gas output chamber, there is disposed a device for separation of oil droplets and/or oil mist.