Hydraulic emergency control device for converting the speed ratio of hydraulic oil pressure in a hydraulic conical pulley axial direction adjusting device of a continuously variable transmission

摘要

The present invention is characterized in that the pump 80 supplies the hydraulic oil to the piston chamber 17 of the second axial regulating device and the downstream pressure limiting valve 40 limits the oil pressure therein, And the throttle valve 73 is disposed downstream of the pump 80. The throttle valve 73 is connected to the throttle valve 73 and the throttle valve 73, To a hydraulic emergency control device for converting the speed ratio of the hydraulic oil pressure in the first and second hydraulic conical pulley axial adjustment devices of the continuously variable transmission (10) controlled by the pressure drop in the hydraulic oil pressure control device. In the configuration of the present invention, in the hydraulic emergency control device of the above-described type, at least the oil pressure restriction for the piston chamber (17) of the second axial direction adjusting device is restricted in the piston chamber (13) Is controlled according to the oil pressure. For this purpose, for example, a parallel, remote-controlled pressure valve 50 is arranged for the pressure-limiting valve 40.