DEVICE FOR INTERNAL COMBUSTION ENGINE, IN PARTICULAR FOR CREATION OF RAREFACTION, INTERNAL COMBUSTION ENGINE, VEHICLE WITH SUCH ENGINE AND METHOD OF SUCH DEVICE OPERATION Russian patent published in 2020 - IPC F01M13/02 F01M13/04 F02M25/00 

FIELD: engine building.

SUBSTANCE: device (V) for creating negative pressure in crankcase (1) of the engine and/or for ventilation of crankcase (1) comprises at least one combustion chamber (4), at least one connected to crankcase (1), oil separator (16.1) and at least one pressure setting device (17.1) configured to establish negative pressure in crankcase (1) during operation in such a way that it is expedient to reduce pressure difference between crankcase (1) and combustion chamber (4). At least one pressure setting device (17.1) serves to create underpressure in crankcase (1) of at least 0.1 mbar, to reduce pressure difference between crankcase (1) and combustion chamber (4). Crankcase (1) is connected via main line (X) at connection point (A) with line (22) for supply of supercharging air to combustion chamber (4). Main device (X) includes control device (19), which serves for at least one of the following: prevention of backflow of air into crankcase (1), limitation of operating range of main device (X) to point (A) of connection and/or restriction of setting of negative pressure in crankcase (1) with operating condition idling, low load and/or forced idling of internal combustion engine. Crankcase (1) is connected via main line (X) at connection point (A) with line (22) for supply of supercharging air to combustion chamber (4). Main device (X) includes check valve (18.1) between pressure setting device (17.1) and connection point (A). Also disclosed are an internal combustion engine, a vehicle and a method of operating the device.

EFFECT: technical result consists in reduction of the number of ejected particles.

14 cl, 2 dwg