Hydraulic device drive pressure setting device and automatic control method of automatic transmission

摘要

To provide a hydraulic device drive pressure setting device and an automatic control method of the automatic transmission that allows to adjust the driving pressure of the kick-down servo brake after setting the reducing pressure to the set value when initially setting the basic pressure acting on the automatic transmission. First pressure sensing means for outputting a corresponding electric signal in accordance with the magnitude of the pressure generated through the redox valve; Second pressure sensing means for outputting a corresponding electric signal in accordance with the magnitude of the driving pressure applied to the kick-down servo brake; After reading the signals output from the first and second pressure monitoring means and outputting a control signal for controlling the operating state of the adjusting screw of the reducing valve to adjust the reducing pressure to the set pressure, the kick-down servo brake Operation control means for outputting a control signal for controlling the operation state of the adjusting screw of the regulator valve so that the driving pressure of the regulator can be included in the setting range, so as to adjust the line pressure of the hydraulic device; The operation state is changed in accordance with the control signal output from the operation control means is composed of a screw rotating device for varying the operation state of the adjusting screw of the reducing valve and the regulator valve.