This blow-by gas discharging device is provided with: a blow-by gas pipe 23 that extends from the upper end height position to the lower end height position of an internal combustion engine 1 and that has an outlet 33 exposed to outside air and opened to the atmosphere; a heating chamber 24 that is provided to the midway of the blow-by gas pipe, and formed in a flywheel housing 10 of the internal combustion engine so as to heat a blow-by gas; and a drain mechanism that is provided to the heating chamber so as to discharge oil accumulated in the heating chamber.

Rotating coalescer elements that maximize the radial-projected separation surface area in a given (rotating) cylindrical volume, where flow to be cleaned is passing axially upward or downward through a separating media of the rotating coalescer element. Various example package assemblies are provided with various types of rotating configurations including cylindrical coiled media packs, frustum coiled media packs, concentric cylinders, coiled metal or polymer films with and without perforations, and/or alternating layers of different materials. The described rotating coalescers may be driven by hydraulic turbine, electric motor, belt, gear or by mounting on rotating machine components, such as rotating engine shafts or connected components.

A blow-by gas filtration assembly (1) fluidly connects an internal combustion engine crankcase ventilation circuit to receive blow-by gases and filter from the gases the suspended particles contained therein. The filtration assembly (1) includes a hollow cylindrical filter group (2) which can be radially crossed by the blow-by gases. In addition, the filtration assembly (1) has a control group (3) that supports and commands in rotation the filter group (2) including: i) a hollow shaft (4) extending along the axis (X-X) in the filter group (2), defining an inner duct (400) fluidly connected with the central cavity (200) for the circulation of the blow-by gases. An electric motor (5) includes a stator (51) and a hollow rotor (52) operatively connected to the hollow shaft (4) to receive an electromagnetic control action from the stator (51) and command in rotation the hollow shaft (4) and thus the filter group (2).

A method for operating an active oil separator for separating oil from exhaust air of a crankcase of a motor vehicle with an internal combustion engine. An engine operating state of the internal combustion engine is detected. A first SET rotational speed of the oil separator is determined as a function of the detected engine operating state and a first characteristic map. A maximum SET rotational speed of the oil separator is determined as a function of the first SET rotational speed by the determination device. A preferred SET rotational speed is determined on the basis of the maximum SET rotational speed by a determination device. An electric motor is controlled to drive the oil separator at the preferred SET rotational speed by a control device. A device is also provided for separating oil from exhaust air of a crankcase of a motor vehicle with an internal combustion engine.

A separator plate having a receptacle for a drive shaft that defines an axis of rotation. Such plate, which includes a first annular region radially adjacent to the receptacle, a second annular region radially adjacent to the first annular region, and a third annular region radially adjacent to the second annular region, can be produced particularly easily if the second annular region has a plurality of spokes connecting the first and the third annular regions to one another and if there are flow channels extending in the axial direction between the spokes.

Various example embodiments relate to rotating coalescers. One embodiment includes a housing comprising a first housing section having a blowby gas inlet structured to receive crankcase blowby gases from a crankcase. The housing further comprises an oil outlet. The rotating coalescer includes an endcap and filter media. The filter media is arranged in a cylindrical shape and is coupled to and positioned between the first housing section and endcap. The filter media is structured to filter the crankcase blowby gases passing through the filter media by coalescing and separating oils and aerosols contained in the crankcase blowby gases. The rotating coalescer includes a hollow shaft extending through the housing and positioned radially inside of the filter media. The hollow shaft forms a blowby gas outlet structured to route filtered crankcase blowby gases out of the housing. The rotating coalescer further includes a drive mechanism operatively coupled to the hollow shaft.

A method for operating a centrifugal separator associated with a prime mover and/or a working machine. The centrifugal separator comprises at least one rotatably mounted rotor that can be rotated at a variable speed via a drive controlled by a control unit. The method is characterized in that the speed of the rotor is controlled according to the sound emissions of the prime mover and/or according to the sound emissions of the working machine.

A blow-by gas filtration assembly fluidically connects to a crankcase ventilation circuit of an internal combustion engine. The filtration assembly has an axis and includes a filter group having a hollow cylindrical shape with a central chamber radially traversable by the blow-by gases, preferably from the outside to the inside. In addition, the filtration assembly includes a support and control member engageable to the filter group for supporting it in an axial position along the axis and for controlling it in rotation around the axis to perform the filtration operations. The member and the filter group include, respectively, a threaded member portion and a threaded filter portion engageable by reciprocal screwing. The member and the filter group also include, respectively, a member abutment and a filter abutment axially engageable along the axis to prevent further screwing of the threaded member portion and a threaded filter portion.

A blow-by gas filtration assembly an axis and includes a support body including a filtration chamber, an inlet mouth of the blow-by gases to be filtered, and an outlet mouth of the filtered blow-by gases. The filtration assembly includes a hollow, cylindrical filter group having a central chamber traversable radially from the outside to the inside by blow-by gases, a control drive operatively connected to the filter group to control it in rotation and a shaft, for support and control, extending along the axis defining internally an air duct through which the filtered blow-by gases flow. The shaft includes a filter portion on which the filter group is mounted, a control portion operatively connected to the control drive and an outflow portion axially positioned between the filter portion and the control portion including at least one outflow window through which the filtered blow-by gases flow.

A blow-by gas filtration assembly fluidically connects to a crankcase ventilation circuit of an internal combustion engine. The filtration assembly has an axis and includes a filter group having a hollow cylindrical shape with a central chamber radially traversable by the blow-by gases, preferably from the outside to the inside. In addition, the filtration assembly includes a support and control member engageable to the filter group for supporting it in an axial position along the axis and for controlling it in rotation around the axis to perform the filtration operations. The member and the filter group respectively include a locking crown and a locking ring specially shaped to accommodate each other. The blow-by gas filtration assembly also includes a locking insert insertable radially with respect to the axis through the locking crown and the locking ring to perform reciprocal locking of the filter group to the member.