HYBRID REGULATOR FOR MAIN PUMP OF EXCAVATOR

摘要

The present invention relates to a hybrid regulator for an excavator main pump. The purpose of the present invention is to provide the hybrid regulator for the excavator main pump which accurately controls the discharge flow rate of a main pump by using an electronic control method controlling the discharge flow rate of the main pump by signals generated from a main control unit mode, reduces unnecessary fuel consumption and is converted to a machine control method controlling the discharge flow rate of the main pump by using pressure generated from the main pump when problems about an electronic control system is generated or a user demands the conversion of a method. The hybrid regulator for the excavator main pump of the present invention comprises: a piston which controls the titling angle of a swash plate of a variable capacity type main pump arranged in an excavator; a control valve which controls the titling angle of the swash plate by controlling the piston; a pilot pressure control valve which controls pilot pressure supplied to the control valve according to current supplied from the main control unit of the excavator; and a selection valve which selectively supplies the pressure discharged from the main pump to the control valve.