TORQUE CONVERTER PRESSURE CONTROL AND WORKING LIQUID COOLING SYSTEM Russian patent published in 2002 - IPC

FIELD: transport engineering. SUBSTANCE: invention relates to oil systems of torque converters of tractors, road vehicles and road-building machines. Proposed system has tank 1 with working liquid, hydraulic pump 4, torque converter 6, differential pressure-relief valve 8, drain plunger valve 17, and cooler 18. in case of overheating of working liquid, pressure in auxiliary working space 13 of valve 8 drops and flow of liquid through torque converter decreases. Spring 15 shifts auxiliary spool 12 in valve 8 to stop 11 of rod 10 and disconnects main space 7 from drain through main spool 9. EFFECT: increased efficiency of operation of torque converter cooling system. 4 dwg