Abstract: The arrangement for controlling the flow of laden gases is arranged upstream of an oil separation system and is provided with a check valve, a bypass valve and a stationary segment. The check valve is at least partially movable so as to define a first passage for a forward first flow direction in the event of positive pressure, while the bypass valve is moved rearward by negative pressure so as to clear a second passage for a second, opposite, flow direction. The stationary segment forms a seating surface for the bypass valve. The bypass valve, urged against the seating surface by an elastic biasing member, forms a seat for the check valve. In the event of sufficient negative pressure, the two valves are moved rearward together despite the biasing member and work together to redirect and guide the flow along an escape path corresponding to the second passage.

Abstract: Disclosed is a device for purifying gas from a crankcase of an internal combustion engine, which includes: a transfer wall having a wall portion with a least one narrow accelerated-distribution opening; one gas-flow deflection wall placed behind the transfer wall and defining an impingement and guide surface; an auxiliary opening separate from the narrow opening, made in the transfer wall; and a bypass valve movable to meet a return member and provided to close the auxiliary opening via closure element for moving closer to the surface, the return member extending in the impingement chamber and having a portion that pushes behind the auxiliary opening in the event of overpressure upstream of the transfer wall.

Abstract: Disclosed is an arrangement of a filtering element for a device for purifying gas from the crankcase of an internal combustion engine, which includes: a filtering element mounted so as to rotate about an axis and having an annular filtering medium; a rotor element capable of being part of a rotating system, making it possible to turn the filtering element by way of notches formed on the outer surface of a sleeve. The flanges of the filtering element are attached to one another in an inner space defined by the medium, typically by snap-fitting, using at least one retaining member and an anchor portion engaging with one another with an anti-rotation effect. The anchoring portion is provided with inner projections forming contact surfaces, preferably angular, which are inserted into the notches of the sleeve when the rotor element is inserted into the inner space.

Abstract: The arrangement for controlling the flow of laden gases is arranged upstream of an oil separation system and is provided with a check valve, a bypass valve and a stationary segment. The check valve is at least partially movable so as to define a first passage for a forward first flow direction in the event of positive pressure, while the bypass valve is moved rearward by negative pressure so as to clear a second passage for a second, opposite, flow direction. The stationary segment forms a seating surface for the bypass valve. The bypass valve, urged against the seating surface by an elastic biasing member, forms a seat for the check valve. In the event of sufficient negative pressure, the two valves are moved rearward together despite the biasing member and work together to redirect and guide the flow along an escape path corresponding to the second passage.

Abstract: Disclosed is an arrangement of a filtering element for a device for purifying gas from the crankcase of an internal combustion engine, which includes: a filtering element mounted so as to rotate about an axis and having an annular filtering medium; a rotor element capable of being part of a rotating system, making it possible to turn the filtering element by way of notches formed on the outer surface of a sleeve. The flanges of the filtering element are attached to one another in an inner space defined by the medium, typically by snap-fitting, using at least one retaining member and an anchor portion engaging with one another with an anti-rotation effect. The anchoring portion is provided with inner projections forming contact surfaces, preferably angular, which are inserted into the notches of the sleeve when the rotor element is inserted into the inner space.

Abstract: Disclosed is a device for purifying gas from a crankcase of an internal combustion engine, which includes: a transfer wall having a wall portion with a least one narrow accelerated-distribution opening; one gas-flow deflection wall placed behind the transfer wall and defining an impingement and guide surface; an auxiliary opening separate from the narrow opening, made in the transfer wall; and a bypass valve movable to meet a return member and provided to close the auxiliary opening via closure element for moving closer to the surface, the return member extending in the impingement chamber and having a portion that pushes behind the auxiliary opening in the event of overpressure upstream of the transfer wall.