Automatic transmission control unit for construction equipment and control method therefor

摘要

The present disclosure relates to an automatic transmission control unit for construction machinery and a control method therefor, and when a load pressure detecting unit detecting a load pressure of hydraulic pressure supplied from a main hydraulic pump to an actuator, such as a cylinder and a hydraulic motor, is in an abnormal state, the automatic transmission control unit receives an electronic control pressure signal having little concerns of a breakdown or a malfunction, and automatically changes a travel speed of construction machinery based on the received electronic control pressure signal.

主权项

1. An automatic transmission control unit for construction machinery, comprising:
an electronic control-type hydraulic pump configured to supply hydraulic pressure to a plurality of actuators; a load pressure detecting unit connected to a discharge line of the electronic control-type hydraulic pump, and configured to detect load pressure applied from the electronic control-type hydraulic pump to the plurality of actuators; a manipulation pressure detecting unit configured to detect a manipulation pressure generated by a manipulation unit operating the plurality of actuators; and a controller configured to receive the load pressure detected by the load pressure detecting unit and the manipulation pressure detected by the manipulation pressure detecting unit, and control a pressure instruction of the hydraulic pump, wherein when the load pressure detecting unit is in a normal state, the controller automatically changes a speed of a travel motor among the plurality of actuators based on the load pressure, and when the load pressure detecting unit is in an abnormal state, the controller automatically changes a speed of the travel motor based on the pressure instruction.