| 摘要 |
<p>The present invention relates to a method for controlling a hydraulic pump of a hybrid construction machine, the method comprising: a torque computing step (s10) for calculating a swing motor torque (T) by multiplying a control current value (Is) of a swing motor (60) by a motor constant (Km); an output calculating step (s20) for calculating a swing motor output (Ps) by multiplying the swing motor torque (T) by the rotation speed (W) of the swing motor (60); an equivalent pump flow rate calculating step (s30) for calculating an equivalent pump flow rate (Qep) by dividing the swing motor output (Ps) by the discharge pressure (Pp) of a hydraulic pump (30); an equivalent swing flow rate calculating step (s40) for calculating an equivalent swing flow rate (Qes) by multiplying the rotation speed (W) of the swing motor (60) by a swing hydraulic motor volume (Ds) of an engine-type excavator; a determined flow rate setting step (s50) for setting, as a determined flow rate (Qr), a greater number between the equivalent swing flow rate (Qes) and the equivalent pump flow rate (Qep) when a sign from the swing motor output (Ps) is a positive number and setting "0" as the determined flow rate (Qr) when the sign from the swing motor output (Ps) is a negative number; a determined pressure calculating step (s60) for calculating a determined pressure (Pf) by substituting the determined flow rate (Qr) for a pump horsepower control diagram; and a determined current value deriving step (s70) for calculating a determined control current value (le) by substituting the determined pressure (Pf) for a current-pressure control diagram, wherein the determined current value (le) controls an electronic proportional control valve of the hydraulic pump (30).</p> |
