HYDRAULIC ARRANGEMENT FOR CONTROLLING A BELT-DRIVEN CONICAL PULLEY TRANSMISSION

摘要

The invention relates to a hydraulic arrangement for controlling a belt-driven conical pulley transmission, comprising a pump taking in a working medium from a working medium tank or via a radiator return valve from a radiator return line. The invention is characterized in that the radiator return valve (69) is configured as a minimum-pressure valve which keeps a connection between the radiator return line (31) and a pump intake line (102) closed by the radiator return valve until a specified minimum pressure is no longer met in the radiator return line, and which opens the connection between the radiator return line and the pump intake line by the radiator return line as soon as the specified minimum pressure in the radiator return line is exceeded.