Separator device for a system for recirculation of the blow-by gases of an internal combustion engine

{
  "publication_number": "US2011290225A1",
  "country": "US",
  "kind": "A1",
  "title": "Separator device for a system for recirculation of the blow-by gases of an internal combustion engine",
  "abstract": "A separator device for a system for recirculation of the blow-by gases of an internal combustion engine includes a casing containing a separation chamber and having an inlet for communication with the engine crankcase and an outlet for communication with the engine intake manifold, and drainage outlets ending in the engine crankcase, for returning the liquid separated in the separation chamber into the engine crankcase. Actuator means sensitive to pressure in the engine crankcase are associated to the inlet and to the drainage outlets so that when the pressure in the engine crankcase is higher than the pressure in the separator device, the inlet is open and the drainage outlets are closed, while when the pressure in the engine crankcase is lower than the pressure in the separator device, the inlet is closed and the drainage outlets are open.",
  "claims": [
    "1. A separator device for a system for recirculation of the blow-by gases of an internal combustion engine, comprising a casing containing a separation chamber and having an inlet for communication with an engine crankcase, an outlet for communication with an engine intake system and one or more drainage outlets ending in the engine crankcase for discharging the separated liquid into the separation chamber, wherein respective actuator means, sensitive to pressure in the engine crankcase, are associated to said inlet and to said drainage outlets so that when the pressure in the engine crankcase is higher than the pressure in the separator device the inlet is open and the drainage outlets are closed, while when the pressure in the engine crankcase is lower than the pressure in the separator device the inlet is closed and the drainage outlets are open, wherein the actuator means associated to said inlet are constituted by a flexible leaf shutter, wherein said drainage outlets are in form of wells with a bottom wall in which the liquid separated in the separation chamber is collected, said bottom wall having passage holes and the respective actuator means comprising a T-shaped shutter suitable to obstruct said passage holes provided in the bottom wall of the wells, and several partitions defining a labyrinth path provided within the casing, a first partition being immediately adjacent to the inlet and being arranged and configured so that the mixture flowing through the inlet into the separator device impacts thereagainst, facilitating separation. 2. Separator device according to claim 1, wherein the entire area of the passage section defined by the abovementioned drainage outlets is smaller than the area of the section for passage through said inlet. 3. An internal combustion engine, comprising one cylinder or two cylinders having pistons movable in the same direction towards the top dead center and towards the bottom dead center, so as to generate a pressure oscillation in the engine crankcase, wherein said engine is provided with a separator device according to claim 1. 4. An internal combustion engine, comprising one cylinder or two cylinders having pistons movable in the same direction towards the top dead center and towards the bottom dead center, so as to generate a pressure oscillation in the engine crankcase, wherein said engine is provided with a separator device according to claim 2."
  ],
  "cpc": [
    "F01M 13/04",
    "F01M 13/022",
    "F01M 13/023",
    "F01M 2013/0044",
    "F01M 2013/005",
    "F01M 2013/045",
    "F01M 2013/0461",
    "F01M 2013/0488",
    "F01M 2013/0494"
  ],
  "assignees": [
    "TORELLA ENRICO",
    "FIAT POWERTRAIN TECH SPA"
  ],
  "filing_date": "2011-05-26",
  "publication_date": "2011-12-01",
  "priority_date": "2010-05-26",
  "application_number": "US-201113116606-A",
  "family_id": "42647325"
}