Hydrostatic transformer for use in vehicle i.e. agricultural harvester, has supply and return lines for hydraulic fluid and connecting adjusting pump and hydrostatic motor to circuit, where electric conductance of supply line is modulated

摘要

#CMT# #/CMT# The transformer has an adjusting pump (3), a hydrostatic motor (6) and supply and return lines (4, 5) for hydraulic fluid, where the lines connect the pump and the motor to a circuit. Electric conductance of the supply line (5) is modulated. A speed sensor and a control valve (9) have changeable passage cross section and modulate the electric conductance depending on the speed of the pump, where the valves have a line section (10) with large passage cross section. A pressure relief valve is arranged in a pressure relief line. #CMT#USE : #/CMT# Hydrostatic transformer for use in a drive train of a drive system e.g. hydraulic traction drive, in an internal combustion engine i.e. diesel engine, of a vehicle (claimed) i.e. agricultural harvester. #CMT#ADVANTAGE : #/CMT# The electric conductance of the one of the lines is modulated, thus enabling reliable brake operation and preventing exceeding of the maximum speed of the pump in the brake operation. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a circuit diagram of a vehicle with a hydraulic traction drive, which uses a hydrostatic transformer. 3 : Adjusting pump 4 : Supply line 5 : Return line 6 : Hydrostatic motor 9 : Control valve 10 : Line section.