Abstract: Disclosed are a hydraulic system for construction equipment and a method of controlling the same, and the hydraulic system for construction equipment includes: a plurality of pressure control-type hydraulic pumps driven by an engine provided in construction equipment; an actuator driven by working oil discharged from the hydraulic pump; a closed center-type main control valve provided between the hydraulic pump and the actuator, and bypassing a virtual flow rate; and a controller configured to control the hydraulic pump by receiving the bypassed virtual flow rate from the main control valve.

Abstract: The method for controlling the hydraulic system of construction machinery according to the present disclosure includes an engine speed prediction step, in which a variable rated engine speed, which varies within a range larger than a fixed rated engine speed and smaller than a high idle engine speed for the fixed rated engine speed and a virtual engine speed, which is to be input later, are predicted to output a virtual engine speed value predicted before an actual engine speed is input. Accordingly, when an operation load is applied, pump torque may initially have a margin, and even though an engine speed is decreased due to the operation load, it is possible to prevent an engine speed decrease phenomenon in which the engine speed becomes remarkably smaller than the rated engine speed.

Abstract: Disclosed are a hydraulic system for construction equipment and a method of controlling the same, and the hydraulic system for construction equipment includes: a plurality of pressure control-type hydraulic pumps driven by an engine provided in construction equipment; an actuator driven by working oil discharged from the hydraulic pump; a closed center-type main control valve provided between the hydraulic pump and the actuator, and bypassing a virtual flow rate; and a controller configured to control the hydraulic pump by receiving the bypassed virtual flow rate from the main control valve.

Abstract: The present disclosure relates to a method for controlling a hydraulic system of construction machinery. The method for controlling the hydraulic system of construction machinery according to the present disclosure includes an engine speed prediction step, in which a variable rated engine speed, which varies within a range larger than a fixed rated engine speed and smaller than a high idle engine speed for the fixed rated engine speed and a virtual engine speed, which is to be input later, are predicted to output a virtual engine speed value predicted before an actual engine speed is input. Accordingly, when an operation load is applied, pump torque may initially have a margin, and even though an engine speed is decreased due to the operation load, it is possible to prevent an engine speed decrease phenomenon in which the engine speed becomes remarkably smaller than the rated engine speed.

Abstract: An exemplary embodiment of the present disclosure relates to a system for active regeneration of a DPF of a diesel engine, and more particularly, to a system and a method for active regeneration of a DPF including an electro-hydraulic pump, in which a non-work load is arbitrarily provided to the diesel engine to quickly perform active regeneration of the DPF even in a state in which substantial work of the construction machine having an electro-hydraulic pump is stopped, and to this end, provides a system and a method for active regeneration of a DPF of a construction machine in that, when performing the active regeneration of the DPF, a center bypass cut valve is driven to convert a hydraulic system of the construction machine to an open state, a predetermined flow rate of working fluid is discharged from the electro-hydraulic pump using an adjustor such as an electromagnetic proportional control valve (EPPR), and the working fluid is collected in to a tank through an opened center bypass line, thus allowing

Abstract: An exemplary embodiment of the present disclosure relates to a system for active regeneration of a DPF of a diesel engine, and more particularly, to a system and a method for active regeneration of a DPF including an electro-hydraulic pump, in which a non-work load is arbitrarily provided to the diesel engine to quickly perform active regeneration of the DPF even in a state in which substantial work of the construction machine having an electro-hydraulic pump is stopped, and to this end, provides a system and a method for active regeneration of a DPF of a construction machine in that, when performing the active regeneration of the DPF, a center bypass cut valve is driven to convert a hydraulic system of the construction machine to an open state, a predetermined flow rate of working fluid is discharged from the electro-hydraulic pump using an adjustor such as an electromagnetic proportional control valve (EPPR), and the working fluid is collected in to a tank through an opened center bypass line, thus allowing