Patents Assigned to Doosan Infracore Co., Ltd.
  • Patent number: 11870823
    Abstract: A call sharing system for a construction work includes an administrator terminal configured to display a working drawing of a construction site on an administrator screen and to transmit a work request signal including a work area designated on the working drawing, a plurality of worker terminals configured to display the working drawing on each worker screen, each worker terminal being configured to receive the work request signal and to transmit a response signal in response to the work request signal, and a server configured to transmit and receive data between the administrator terminal and the worker terminals and to select the worker terminals for receiving the work request signal according to a work detail.
    Type: Grant
    Filed: April 7, 2022
    Date of Patent: January 9, 2024
    Assignee: HYUNDAI DOOSAN INFRACORE CO., LTD.
    Inventors: Heongsik Um, Junhyun Jang, Gijung Yun
  • Patent number: 11814819
    Abstract: A construction machinery bucket part includes a body including a low alloy cast iron, and a wear resistant tip cast bonded to an end portion of the body and including a white cast iron. The construction machinery bucket part includes dissimilar materials, and has improved economic feasibility and wear resistance.
    Type: Grant
    Filed: November 17, 2017
    Date of Patent: November 14, 2023
    Assignee: DOOSAN INFRACORE CO., LTD
    Inventors: Choung-Rae Lee, Sang-Min An
  • Patent number: 11802530
    Abstract: In a method of removing particles in an injector of a diesel engine, a stop of the diesel engine may be recognized. An injection signal may be inputted into the injector of the stopped diesel engine. A control valve of the injector may be moved in a low-pressure passage by the injection signal to remove the particles accumulated on an inner wall of the low-pressure passage. Thus, a malfunction of the control valve caused by the particles may be previously prevented.
    Type: Grant
    Filed: January 26, 2022
    Date of Patent: October 31, 2023
    Assignee: HYUNDAI DOOSAN INFRACORE CO., LTD.
    Inventor: Hyoungmin Han
  • Patent number: 11787329
    Abstract: Disclosed is a lamp module for an industrial vehicle. The lamp module for an industrial vehicle according to an embodiment of the present utility model can be installed inside a counterweight, unlike the conventional method of embedding in the counterweight, thereby improving workability and assemblability of the operator and improving visibility.
    Type: Grant
    Filed: February 9, 2022
    Date of Patent: October 17, 2023
    Assignee: HYUNDAI DOOSAN INFRACORE CO., LTD.
    Inventor: Mi Yeon Kim
  • Patent number: 11781471
    Abstract: A turbo-compounding system according to an exemplary embodiment of the present invention includes: a turbocharger including a turbine which is rotated by using pressure of exhaust gas discharged from the engine and a compressor which is rotated by using rotation power of the turbine and compresses new external air and supplies the compressed air to the engine; a motor-generator configured to be rotated by using rotation power of the compressor of the turbocharger to generate power or add rotation power to the compressor of the turbocharger; and a control device configured to operate the motor-generator as a motor or a generator according to a current rotation speed of the engine and may collect power wasted from the engine.
    Type: Grant
    Filed: December 9, 2019
    Date of Patent: October 10, 2023
    Assignee: DOOSAN INFRACORE CO., LTD.
    Inventors: Youngdeok Han, Dockoon Yoo, Junjung Park, Jongyoon Lee, Jayun Cho, Euna Kang
  • Patent number: 11773568
    Abstract: A brake control apparatus for construction machinery, includes first and second brake lines through which a brake oil is supplied to a front brake device and a rear brake device of the construction machinery, first and second proportional flow control valves installed respectively in the first and second brake lines to control a flow rate of the brake oil in proportion to inputted first and second brake control signals, a sensing portion configured to detect work and travel information of the construction machinery, and a controller configured to output the first and second brake control signals in response to a brake manipulation signal of a driver, and configured to control independently the first and second proportional flow control valves based on the work and travel information of the construction machinery detected by the sensing portion.
    Type: Grant
    Filed: January 28, 2019
    Date of Patent: October 3, 2023
    Assignee: DOOSAN INFRACORE CO., LTD.
    Inventors: Yeonhaeng Heo, Kwangseok Park, Gyuhong Park
  • Patent number: 11739675
    Abstract: An exhaust gas after-treatment system includes a first reactor installed in an exhaust flow path, a second reactor disposed at a downstream side from the first reactor, a first reducing agent injection unit and a second reducing agent injection unit configured to respectively inject a reducing agent toward the exhaust gas to be introduced into the first reactor and the second reactor, a first temperature sensor and a second temperature sensor configured to respectively measure a temperature of the exhaust gas to be introduced into the first reactor and the second reactor, and a control device configured to control whether to inject the reducing agent from the first and second reducing agent injection units and the amount of reducing agent to be injected on the basis of temperature information provided by the first and second temperature sensors.
    Type: Grant
    Filed: February 15, 2022
    Date of Patent: August 29, 2023
    Assignee: HYUNDAI DOOSAN INFRACORE CO., LTD.
    Inventors: Dongyoung Jin, Inhyuk Im, Jiseok Kim, Rin Hyun, Taejoong Wang
  • Patent number: 11692329
    Abstract: An embodiment of the present invention relates to an apparatus for controlling quick clamping of construction machine which comprises a clamp for mounting an attachment, the apparatus including: a selection input unit for generating a selection signal during an on operation by an operator; an operation input unit for generating an operation signal during an operation by the operator; a clamp driving unit for releasing and fastening the clamp; and a controller for controlling the clamp driving unit to release the clamp while the operation signal is input after the selection signal is input.
    Type: Grant
    Filed: January 17, 2018
    Date of Patent: July 4, 2023
    Assignee: DOOSAN INFRACORE CO., LTD.
    Inventors: Young Sup Lim, Jun Hong Park, Duck Woo Park
  • Patent number: 11634887
    Abstract: In a method of controlling construction machinery, a bucket of a working device is moved along a first excavation trajectory to perform an excavation operation on the ground of a work area. A digging force exerted on the bucket during the excavation operation is calculated. A new second excavation trajectory is generated based on the calculated digging force. The bucket is moved along the second excavation trajectory.
    Type: Grant
    Filed: November 19, 2020
    Date of Patent: April 25, 2023
    Assignee: DOOSAN INFRACORE CO., LTD.
    Inventors: Changmook Kim, Dongjun Lee, Changu Kim, Bukun Son
  • Patent number: 11542683
    Abstract: A construction machine according to an exemplary embodiment of the present invention includes: an engine; a boom cylinder which is divided into a head side and a rod side; a regeneration line through which hydraulic fluid discharged from the head side of the boom cylinder moves when the boom descends; a regeneration motor which is connected with the regeneration line and is operated, and assists the engine; a pilot pump which generates a pilot pressure; a pilot line through which pilot hydraulic fluid discharged from the pilot pump moves; a regeneration connection line which connects the pilot line and the regeneration line; an on/off valve installed in the regeneration connection line; and a control device which closes the on/off valve when a pressure of the pilot line drops below a predetermined pressure or the hydraulic fluid discharged from the boom cylinder is supplied to the regeneration motor.
    Type: Grant
    Filed: February 12, 2020
    Date of Patent: January 3, 2023
    Assignee: DOOSAN INFRACORE CO., LTD.
    Inventor: Byung Il Kang
  • Patent number: 11541827
    Abstract: A control system for construction machinery includes an upper camera installed in a driver cabin to photograph the front of the driver cabin, a lower camera installed in a vehicle body to photograph the front of the vehicle body, a work apparatus posture detection portion configured to detect a posture of the work apparatus connected rotatably to the vehicle body, an image processing portion configured to synthesize first and second images captured from the upper camera and the lower camera into one image, and configured to transparency-process at least one of the first and second images in the synthesized image according to the posture of the work apparatus detected by the work apparatus posture detection portion, and a display device configured to display the synthesized image transparency-processed by the image processing portion.
    Type: Grant
    Filed: January 6, 2021
    Date of Patent: January 3, 2023
    Assignees: DOOSAN INFRACORE CO., LTD., WISE AUTOMOTIVE CORPORATION
    Inventors: Cavin Lee, Jaehong Park, Jungpyo Lee
  • Patent number: 11525242
    Abstract: In a control method for construction machinery, an operation performed by the construction machinery is divided into a plurality of subordinate works. A current subordinate work currently performed by the construction machinery is determined. A maximum absorbing torque of a hydraulic pump is adjusted according to the determined subordinate work. An engine speed change map is adjusted according to the determined subordinate work.
    Type: Grant
    Filed: February 12, 2021
    Date of Patent: December 13, 2022
    Assignee: DOOSAN INFRACORE CO., LTD.
    Inventors: Wooyong Jung, Wonsun Sohn, Jaiseok Bang
  • Patent number: 11472372
    Abstract: A control system for construction machinery includes a smart key configured to store a plurality of authentication codes and activate any one of the authentication codes, and a plurality of construction machines including a plurality of smart key modules mounted thereon respectively, the smart key modules communicating wirelessly with the smart key and having respective registration authentication codes which match with the authentication codes respectively. The construction machine including the smart key module having the registration authentication code which matches with the activated authentication code is controlled by the smart key.
    Type: Grant
    Filed: March 10, 2020
    Date of Patent: October 18, 2022
    Assignee: DOOSAN INFRACORE CO., LTD.
    Inventors: Jihoon Kim, Byoungheon Park, Wooseok Seo
  • Patent number: 11447087
    Abstract: A canopy assembly includes a lower canopy installed fixedly in a side of a driver's seat and including a pair of first and second lower pipes that extend upwardly respectively, a pair of fastening blocks inserted and fixed into the first and second lower pipes respectively, each of the fastening blocks having a receiving hole therein that extends from an upper surface into the inside thereof, and an upper canopy including a pair of first and second upper pipes that are inserted and fixed into the receiving holes of the fastening blocks respectively.
    Type: Grant
    Filed: March 4, 2019
    Date of Patent: September 20, 2022
    Assignee: DOOSAN INFRACORE CO., LTD.
    Inventors: Sangkyoo Lee, Minkyu Yang
  • Patent number: 11377821
    Abstract: A method of controlling a safety apparatus of a construction machine includes: applying a power to the construction machine when a key switch operation of a worker is input; receiving operation signals of the parking switch, the FNR switch, and the pilot cutoff switch; determining whether operation states of the parking switch, the FNR switch, and the pilot cutoff switch satisfy predetermined conditions; and controlling the construction machine to be available for the start-up when the predetermined conditions are satisfied. The predetermined conditions are that the parking switch is operated to be on so that a parking brake is operated, the FNR switch is operated to select a neutral so that a traveling direction of the construction machine is in a neutral state, and the pilot cutoff switch is operated to be on so that the construction machine is in a pilot cutoff state.
    Type: Grant
    Filed: February 12, 2018
    Date of Patent: July 5, 2022
    Assignee: DOOSAN INFRACORE CO., LTD.
    Inventors: Young Sup Lim, Duck Woo Park, Jun Hong Park
  • Patent number: 11313104
    Abstract: A control system for construction machinery includes a hydraulic cylinder operable by a working oil discharged from a hydraulic pump, a control valve arranged between the hydraulic pump and the hydraulic cylinder to control an operation of the hydraulic cylinder according to a position of a spool therein, the control valve having a first spool position for draining the working oil discharged from a chamber of the hydraulic cylinder to a drain tank, and a pressure compensated valve installed in a return hydraulic line through which the working oil discharged from the control valve at the first spool position is drained to the drain tank, the pressure compensated valve being configured to control a flow rate of the working oil passing through the pressure compensated valve according to a pressure difference between a front end and a rear end of the control valve.
    Type: Grant
    Filed: September 27, 2019
    Date of Patent: April 26, 2022
    Assignee: DOOSAN INFRACORE CO., LTD
    Inventor: Hyeonsik Ahn
  • Patent number: 11286647
    Abstract: An electro-hydraulic control apparatus for construction machinery includes a control valve installed in a hydraulic line between a hydraulic pump and an actuator to control operations of the actuator according to a displacement amount of a spool therein, a spool displacement adjusting valve configured to output a secondary pressure in proportion to an inputted pressure command signal to the spool of the control valve to control the displacement amount of the spool of the control valve, a pressure sensor to detect the secondary pressure outputted from the spool displacement adjusting valve, and a controller configured to output the pressure command signal to the spool displacement adjusting valve according to a manipulation signal of the construction machinery, and to correct the pressure command signal when a pressure difference between the detected secondary pressure and a design pressure predetermined by the pressure command signal is out of a preset allowable range.
    Type: Grant
    Filed: February 22, 2019
    Date of Patent: March 29, 2022
    Assignee: DOOSAN INFRACORE CO., LTD.
    Inventors: Taeyoon Kim, Gyebong Jang
  • Patent number: 11203853
    Abstract: A cabin assembly for construction equipment includes a main frame; a mount mounted on the main frame; a cabin fixed to the main frame by the mount while spaced a predetermined distance apart therefrom; a retainer for connecting the cabin to the main frame and fixing the cabin to the main frame such that the cabin is not inclined at a first angle or greater with respect to the main frame; and a support installed on one of the main frame and a lower surface of the cabin, including an end portion facing the other of the main frame and the lower surface of the cabin while being spaced apart therefrom, and when the cabin is inclined at a second angle or greater with respect to the main frame, contacting the other of the main frame and the lower surface of the cabin to support the cabin.
    Type: Grant
    Filed: February 28, 2018
    Date of Patent: December 21, 2021
    Assignee: DOOSAN INFRACORE CO., LTD.
    Inventor: Sang Kyoo Lee
  • Patent number: D936707
    Type: Grant
    Filed: May 5, 2020
    Date of Patent: November 23, 2021
    Assignee: DOOSAN INFRACORE CO., LTD.
    Inventors: Juntae Kim, Seula Choi, Hokwang Ryu, Yoojeung Lim, Eunsook Seo, Sunwook Kwack, Younsik Bae, Nadan Cho
  • Patent number: D1006678
    Type: Grant
    Filed: May 5, 2020
    Date of Patent: December 5, 2023
    Assignee: DOOSAN INFRACORE CO., LTD.
    Inventors: Juntae Kim, Nadan Cho, Yoojeung Lim, Eunsook Seo, Sunwook Kwack, Younsik Bae, Hokwang Ryu, Seula Choi