公开(公告)号：US20170198458A1

公开(公告)日：2017-07-13

申请号：US15398279

申请日：2017-01-04

Applicant: Doosan Infracore Co., Ltd.

Inventor： Lee Hyoung CHO ,  Won Sun SOHN ,  Byung Yoon SONG ,  Jai Seok BANG ,  Min Ha AN

IPC: E02F9/20 ,  F02D29/04 ,  F02D29/02 ,  F02D35/00

Abstract: The present disclosure relates to a control device and a control method for a construction machine. The control device and the control method for the construction machine according to the exemplary embodiment of the present disclosure may adjust an engine revolutions per minute (rpm) according to a load applied to the construction machine, thereby controlling an output of equipment. In the control device and the control method for the construction machine according to the exemplary embodiment of the present disclosure, an output of a pump is increased at an appropriate time, so that good operation performance may be maintained, and in the case of an operation pattern, in which a load is low, the engine rpm is adjusted to be decreased, thereby improving fuel efficiency.

公开(公告)号：US20160102686A1

公开(公告)日：2016-04-14

申请号：US14777658

申请日：2014-03-26

Applicant: DOOSAN INFRACORE CO., LTD.

Inventor： Min Ha AN

IPC: F15B11/10 ,  F15B13/042

CPC classification number: F15B11/10 ,  E02F9/2217 ,  E02F9/2228 ,  E02F9/2289 ,  E02F9/2292 ,  E02F9/2296 ,  F15B7/006 ,  F15B11/17 ,  F15B13/042 ,  F15B21/14 ,  F15B2211/20523 ,  F15B2211/20546 ,  F15B2211/20561 ,  F15B2211/20569 ,  F15B2211/20576 ,  F15B2211/27 ,  F15B2211/30515 ,  F15B2211/3057 ,  F15B2211/30595 ,  F15B2211/31529 ,  F15B2211/327 ,  F15B2211/613 ,  F15B2211/625 ,  F15B2211/6346 ,  F15B2211/7142 ,  F15B2211/88

Abstract: The present disclosure relates to a hydraulic system for construction equipment, and more particularly, to a hydraulic system, in which an actuator is controlled by a pump/motor. The hydraulic system for construction equipment according to the present disclosure includes logic valves in first and second hydraulic lines provided to an actuator, respectively, and when it is desired to operate the actuator in a state where an operation of the actuator is stopped by closing the logic valves, a pressure difference may be resolved by increasing pressure in sections of a pump/motor and the logic valves in advance even if a load is applied to the actuator, and thus the actuator may implement a desired operation without being affected by the load. That is, it is possible to improve operation controllability of the actuator.

Abstract translation: 本公开涉及一种用于施工设备的液压系统，更具体地，涉及一种液压系统，其中致动器由泵/马达控制。 根据本公开的用于施工设备的液压系统包括分别设置到致动器的第一和第二液压管路中的逻辑阀，以及当期望在致动器的操作通过关闭致动器停止的状态下操作致动器 逻辑阀可以通过在泵/电动机和逻辑阀的部分中预先增加压力来解决压力差，即使负载被施加到致动器，因此致动器可以实现期望的操作而不受负载的影响 。 也就是说，可以提高致动器的操作可控性。

公开(公告)号：US20160032945A1

公开(公告)日：2016-02-04

申请号：US14776367

申请日：2014-03-13

Applicant: DOOSAN INFRACORE CO., LTD.

Inventor： Yong Lak CHO ,  Dal Sik JANG ,  Woo Yong JUNG ,  Min Ha AN ,  A Reum SEO ,  Sang Woo LEE ,  Yoon Seok JANG

IPC: F15B1/027 ,  F15B11/10 ,  F15B13/04 ,  F15B1/04 ,  F15B13/02

CPC classification number: F15B1/027 ,  E02F9/2217 ,  E02F9/2267 ,  E02F9/2289 ,  E02F9/2292 ,  E02F9/2296 ,  F15B1/04 ,  F15B11/10 ,  F15B11/17 ,  F15B13/027 ,  F15B13/04 ,  F15B2201/4155 ,  F15B2201/51 ,  F15B2211/20561 ,  F15B2211/20576 ,  F15B2211/212 ,  F15B2211/27 ,  F15B2211/40 ,  F15B2211/7053 ,  F15B2211/785

Abstract: The present disclosure relates to a hydraulic system for a construction machine, and more particularly, to a hydraulic system for a construction machine including a plurality of actuators, in which each of the actuators includes a pump/motor, is operated under a control of a corresponding pump/motor, and stores working oil in an accumulator or receives the working oil supplemented from the accumulator in accordance with a difference between a flow rate entering the actuator and a flow rate discharged from the actuator.

Abstract translation: 本发明涉及一种用于建筑机械的液压系统，更具体地，涉及一种用于建筑机械的液压系统，该系统包括多个致动器，其中每个致动器包括泵/马达，在一个控制下运行 相应的泵/马达，并且将工作油存储在蓄能器中，或者根据进入致动器的流量与从致动器排出的流量之间的差异，接收从蓄能器补充的工作油。