SYSTEM FOR VENTILATION AND SEALING OF INTERNAL COMBUSTION ENGINE CRANKCASE Russian patent published in 1995 - IPC

FIELD: engine engineering. SUBSTANCE: system has air receiver 4 connected with part 5 of the housing of a control valve through connecting pipe line 3. The control valve is mounted in pipe lines 6 and 9 for sucking gases from crankcase 1 of the engine and feeding them to the inlet system. The control chamber of the housing is separated into two spaces by diaphragm 17 squeezed between parts 5 and 18 of the housing. One of the spaces is in communication with the ambient, and the other one is provided with plunger 13. Pipe line 6 is connected with transmission crankcase 2 through branch pipe 20 and with space 8 of the control valve housing through branch pipe 7. Through connecting passageways 14 and 15 are made in plunger 13. The passageways serve for feeding air to crankcases 1 and 2 from receiver 3 or withdrawing crankcase gases to the inlet system (air filter 10) of the engine. Diaphragm 17 is affected by spring 19 and pressure of the crankcase gases from the one side. The other side of the diaphragm undergoes air pressure when a vehicle is in motion by land or water pressure when the vehicle is in motion by water. EFFECT: enhanced reliability. 3 dwg