Cyclone separator

A cyclone separator, in particular provided for the oil-gas separation and more particularly provided for the separation and the recovery of the oil particles contained in the recycled crankcase gases, in an internal combustion engine of a motor vehicle,

• the cyclone separator including, from top to bottom:
• a tangential upper inlet of the gases containing particles and in particular oil drops to be eliminated,
• a cylindrical area of catchment of particles and in particular of liquid oil, and
• a lower area of storage of the phase, such as the oil, which has been separated,
• while an axial outlet of the gases is provided,
• the cyclone separator further including an outer body having a generally cylindrical shape with a flat bottom, without a conical lower area,
• wherein an inner body is movably mounted vertically in the outer body, the inner body being rotationally symmetrical recessed and cooperating with the opening of the tangential upper inlet of the gases and/or with the start of the axial outlet of the gases, so as to make the passage section of the gases variable according to the height position of said inner body.