US 12,258,733 B2
Construction machine
Byung Il Kang, Incheon (KR)
Assigned to HD HYUNDAI INFRACORE CO., LTD., Incheon (KR)
Appl. No. 16/606,363
Filed by HD HYUNDAI INFRACORE CO., LTD., Incheon (KR)
PCT Filed Apr. 18, 2018, PCT No. PCT/KR2018/004474
§ 371(c)(1), (2) Date Mar. 28, 2023,
PCT Pub. No. WO2018/194357, PCT Pub. Date Oct. 25, 2018.
Claims priority of application No. 10-2017-0049981 (KR), filed on Apr. 18, 2017.
Prior Publication US 2023/0228061 A1, Jul. 20, 2023
Int. Cl. E02F 9/22 (2006.01); E02F 9/12 (2006.01)
CPC E02F 9/2217 (2013.01) [E02F 9/123 (2013.01); E02F 9/2296 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A construction machine, comprising:
a main pump;
a swing motor operated by receiving a hydraulic oil from the main pump;
a swing valve configured to control flow of the hydraulic oil by the main pump to supply the hydraulic oil to the swing motor and to control the flow of the hydraulic oil having been discharged from the swing motor;
a hydraulic oil control valve unit provided between the swing motor and the swing valve and configured to control the flow of the hydraulic oil according to a pressure of the hydraulic oil at opposite ends;
a first accumulator configured to store the hydraulic oil having passed through the hydraulic oil control valve unit when the swing motor is decelerated;
a regeneration control valve provided between the hydraulic oil control valve unit and the first accumulator;
a regenerative motor which is drivable by the hydraulic oil stored in the first accumulator;
an accumulator valve disposed between the regenerative motor and the first accumulator, the accumulator valve being opened and closed according to supply of the hydraulic oil to be stored in the first accumulator; and
a controller configured to control the hydraulic oil control valve unit and the regeneration control valve by determining acceleration or deceleration of the swing motor.