TILT ANGLE CONTROL DEVICE

摘要

A tilting angle control device 1 includes pressure sensors 51 to 56. Each of the pressure sensors 51 to 56 outputs to a control unit 60 a pressure command signal corresponding to an operation amount. The control unit 60 outputs to an electromagnetic proportional control valve 44 a pressure control signal corresponding to the pressure command signal, and the electromagnetic proportional control valve 44 outputs to a tilt adjustment mechanism 31 pilot pressure p2 corresponding to the pressure control signal. The tilt adjustment mechanism 31 adjusts a tilting angle ± of a variable displacement pump 10L such that the tilting angle ± becomes an angle corresponding to the pilot pressure p2. A pilot pressure sensor 45 detects the pilot pressure p2 to output a pressure feedback signal to the control unit 60. The control unit 60 calculates the pressure control signal based on the pressure feedback signal and the pressure command signal and performs feedback control of the pilot pressure p2.