| CPC E02F 9/2203 (2013.01) [E02F 9/2292 (2013.01)] | 14 Claims |
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1. An excavator, comprising:
a lower travelling body;
an upper rotating body mounted rotatably on the lower travelling body;
an attachment attached to the upper rotating body and including a boom, an arm, and a bucket;
a first hydraulic pump and a second hydraulic pump;
a control valve configured to merge first operating oil discharged from the first hydraulic pump and second operating oil discharged from the second hydraulic pump with each other; and
a processing circuit configured to control functioning of the control valve,
wherein the processing circuit is configured to, while at least two selected from the boom, the arm, and the bucket are moving simultaneously in a non-travelling state,
compare a first discharging pressure of the first hydraulic pump and a second discharging pressure of the second hydraulic pump to determine whether the second discharging pressure is higher than the first discharging pressure, and
move the control valve to merge the first operating oil and the second operating oil at the control valve in response to determining that the second discharging pressure is higher than the first discharging pressure.
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