Condition Responsive Patents (Class 37/348)
  • Patent number: 10323388
    Abstract: A display system for a construction machine includes: a moving direction computing section for computing a predictive moving direction of a bucket; a work-tool display control section that, if the moving direction computing section predicts a movement of the bucket, changes the display position of a bucket image based on the predictive moving direction such that the area of a region located on the predictive moving direction side from the bucket image on the display screen of a monitor is displayed wider than when the bucket image is displayed at a reference position and that displays the bucket image at the reference position if a movement of the bucket cannot be predicted. A target-surface display control section displays on the display screen an image of a target surface when the bucket image is displayed at the display position determined by the work-tool display control section.
    Type: Grant
    Filed: March 10, 2016
    Date of Patent: June 18, 2019
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Yasuhiko Kanari, Manabu Edamura, Shiho Izumi, Takahiko Kurose
  • Patent number: 10221871
    Abstract: The Construction machinery includes at least two actuators, a main pump that generates hydraulic energy for driving the actuators, control valves disposed between the main pump and the actuators, a hydraulic pump motor driven by the generator motor that generates energy to be added to the hydraulic energy, and a controller that reduces hydraulic energy generated by the main pump when the hydraulic pump motor driven by the generator-motor generates energy. The construction machinery further comprises changeover valves that selectively change a location at which the energy from the hydraulic pump motor driven by the generator-motor is to be added according to the actuators. The controller changes a reduction rate of the hydraulic energy generated by the main pump depending on a specific actuator to which the energy is to be added.
    Type: Grant
    Filed: February 1, 2017
    Date of Patent: March 5, 2019
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Shinya Imura, Hidetoshi Satake, Kouji Ishikawa, Seiji Hijikata, Takatoshi Ooki, Shinji Nishikawa
  • Patent number: 10208459
    Abstract: A blind spot estimation portion for estimating the blind spot region of the object in the bucket; a blind spot region shape estimation portion for estimating a shape of the object in the blind spot region; and a volume estimation portion for estimating a volume of the object in the blind spot region are included, the blind spot estimation portion estimates the blind spot region by mesh disparity data obtained from a captured image of the object in the bucket imaged by a plurality of cameras, the blind spot region shape estimation portion estimates the shape of the object in the blind spot region by the mesh disparity data, and the volume estimation portion estimates the volume of the object in the blind spot region based on the shape of the object in the blind spot region estimated by the blind spot region shape estimation portion and a shape of a bottom of the bucket.
    Type: Grant
    Filed: December 12, 2014
    Date of Patent: February 19, 2019
    Assignee: Hitachi, Ltd.
    Inventors: Shigeru Matsuo, Noriyasu Hasejima, Kenichirou Kurata
  • Patent number: 10208453
    Abstract: A method for monitoring a work zone in a worksite is disclosed. The work zone includes an overburden region, a dump region having an incline of positive slope, and an initial pivot point at a junction of the overburden region and the incline. The method includes monitoring, by a controller, an elevation of the work zone based on an elevation data received from one or more sensors. Further, the method comprises detecting, by the controller, a location in the work zone having an elevation lower than an elevation of the initial pivot point based on the elevation data. Furthermore, the method comprises updating, by the controller, the detected location as a new pivot point if the detected location is within a predetermined distance from the initial pivot point.
    Type: Grant
    Filed: May 16, 2017
    Date of Patent: February 19, 2019
    Assignee: Caterpillar Inc.
    Inventors: Michael A. Taylor, Steven E. Empson, Mo Wei
  • Patent number: 10174484
    Abstract: The present disclosure relates to a control circuit and a control method for boom energy regeneration, and the control circuit for boom energy regeneration includes: a control unit which controls a discharge amount control valve, such that the amount of oil, which is discharged from a head of a boom cylinder, is supplied to a regeneration device or a rod of the boom cylinder through a hydraulic regeneration line, and when the regeneration device has an abnormality, the amount of oil, which is discharged from the head of the boom cylinder, is supplied to the main control valve through a hydraulic discharge line.
    Type: Grant
    Filed: December 17, 2014
    Date of Patent: January 8, 2019
    Assignee: DOOSAN INFRACORE CO., LTD.
    Inventor: Choon Shik Joo
  • Patent number: 10166969
    Abstract: A method and apparatus for recuperating energy in a hybrid vehicle, having an internal combustion engine an electrical machine, and on-board electrical system with an energy store that can be charged with electrical energy during a recuperation operation. A recuperation power for a recuperation operation of the electrical machine is set to a first value that allows a recuperation operation with a maximum generator capacity of the electrical machine if an actual energy level of the energy store is lower than or equal to a threshold value. However, the recuperation power for a recuperation operation is set to a second value lower than the first value and allows a recuperation operation with a reduced generator capacity of the electrical machine if the actual energy level of the energy store is greater than the threshold value.
    Type: Grant
    Filed: May 18, 2016
    Date of Patent: January 1, 2019
    Assignee: MAN Truck & Bus AG
    Inventors: Detlef Fischer, Stefan Pfau, Matthias Hierlmeier
  • Patent number: 10132335
    Abstract: Industrial machines and methods of operating the same. One industrial machine includes at least one controller that is configured to (1) detect an occurrence of a regenerative work cycle segment within a repetitive work cycle performed by the industrial machine and including a plurality of work cycle segments and (2) modify operation of at least one power source included in the industrial machine for the regenerative work cycle segment (i.e., prior to and/or during the regenerative work cycle segment).
    Type: Grant
    Filed: September 23, 2013
    Date of Patent: November 20, 2018
    Assignee: Joy Global Surface Mining Inc
    Inventors: Joe Wutke, William A. Dorsett, Marcus N. Barr, Jason Sorgee
  • Patent number: 10132056
    Abstract: A shovel that performs excavation in accordance with an arm excavation operation including an arm closing operation includes an excavation operation detection part, a position detection part, a maximum allowable pressure calculation part, and an arm cylinder pressure control part. The excavation operation detection part detects that the arm excavation operation has been performed. The position detection part detects the position of the shovel. The maximum allowable pressure calculation part calculates the pressure of the expansion-side oil chamber of an arm cylinder corresponding to an excavation reaction force at a time when the shovel is dragged by the excavation reaction force as a maximum allowable pressure, based on the position of the shovel. The arm cylinder pressure control part controls the pressure of the expansion-side oil chamber not to exceed the maximum allowable pressure when the arm excavation operation is performed.
    Type: Grant
    Filed: July 1, 2016
    Date of Patent: November 20, 2018
    Assignee: SUMITOMO(S.H.I.) CONSTRUCTION MACHINERY CO., LTD.
    Inventor: Hiroyuki Tsukamoto
  • Patent number: 10119250
    Abstract: A work machine control system that controls a work machine including a member that rotates about a shaft line includes a target construction shape generation unit that generates a target construction shape indicating a target shape of a construction target of the work machine; and a determination unit that outputs first information when the member is present on an air side which is a side on which the work machine is present in relation to the target construction shape and outputs second information when the member is not present on the air side.
    Type: Grant
    Filed: May 31, 2016
    Date of Patent: November 6, 2018
    Assignee: Komatsu Ltd.
    Inventors: Tsutomu Iwamura, Yoshiro Iwasaki
  • Patent number: 10106951
    Abstract: An automatic dump control system and method are disclosed for a loader having a boom and a bucket each positionable by hydraulic cylinders actuated by a hydraulic circuit. The control system includes a source of image data of a receptacle and a source of position data for the boom and the bucket. The control system includes a controller that: determines a height of the receptacle based on the image data; determines a difference between the height of the receptacle and a height of the bucket based on the position data; outputs one or more control signals to the hydraulic circuit to position at least one of the boom and the bucket at a target height above the receptacle; determines that the bucket is positioned over the receptacle; and outputs one or more control signals to the hydraulic circuit to dump a load in the bucket into the receptacle.
    Type: Grant
    Filed: September 21, 2016
    Date of Patent: October 23, 2018
    Assignee: DEERE & COMPANY
    Inventor: David J. Myers
  • Patent number: 10094654
    Abstract: An integrated sensing device with a suite of sensors assists construction machine operators in finding the correct level to dig a ditch/trench. The sensing device includes a gravity sensor to determine angles, a laser distance meter (LDM), and a laser receiver for detecting a known jobsite elevation. The sensing device is mounted to the dipper stick of an excavator; the gravity sensor detects the angle of the stick, and the laser receiver detects a laser plane of light that represents a known jobsite elevation. The LDM is aimed at another member of the machine that moves in a predetermined path as the bucket is rotated, and the distance between the LDM and the target member is used to calculate the vertical elevation of the working tool edge. A display graphically shows the operator the proper dig depth and the present position of the working tool edge.
    Type: Grant
    Filed: August 25, 2014
    Date of Patent: October 9, 2018
    Assignee: Trimble Navigation Limited
    Inventors: Scott Tasman Crozier, Kevin Ray Nau
  • Patent number: 10087605
    Abstract: A diagnostic system for a work machine includes a data storage device (210) in which sensor information (A) input from a sensor (101A) that senses an oil property of oil used for operation of the work machine and an abnormality degree determination value defined for each kind of the sensor information (A) are stored, and an arithmetic processing device (104) that executes first processing of discriminating the degree of abnormality level of the oil based on the sensor information (A) and the abnormality degree determination value, second processing of determining whether or not necessity to carry out oil analysis involving oil extraction exists based on the degree of abnormality level of the oil discriminated in the first processing, and third processing of outputting information indicating that the oil analysis is necessary to other terminal if it is determined that the oil analysis is necessary in the second processing.
    Type: Grant
    Filed: October 20, 2015
    Date of Patent: October 2, 2018
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Teruo Nakamura, Akira Kurasako, Hideki Akita, Yoshiya Hamamachi, Katsutoshi Hakozaki, Kotaro Ogura
  • Patent number: 10072395
    Abstract: A shovel includes a lower running body and an upper turning body that is turnably provided on the lower running body. An engine is mounted on the upper turning body. A hydraulic pump is driven by the engine to discharge an operating oil. A hydraulic actuator is mounted on the upper turning body. A control device controls operations of the shovel. An entering object detection device detects a position of an entering object in a monitoring area of said shovel and outputs a detection signal indicating the detection position of said entering object. The control device supplies, after a determination of an entry of the entering object into the monitoring area, the operating oil from the hydraulic pump to the hydraulic actuator.
    Type: Grant
    Filed: March 19, 2015
    Date of Patent: September 11, 2018
    Assignee: SUMITOMO(S.H.I.) CONSTRUCTION MACHINERY CO., LTD.
    Inventor: Hiroyuki Tsukamoto
  • Patent number: 10053835
    Abstract: A shovel includes an attachment including a working assembly, a diesel engine provided with a supercharger, an oil hydraulic pump connected to the diesel engine provided with the supercharger, and a controller that executes a preload boost function, wherein the preload boost function is for increasing boost pressure of the supercharger prior to increasing a hydraulic pressure load on the oil hydraulic pump, wherein a range accessible by a predetermined part of the attachment includes a partial range at which, upon the working assembly being operated, the preload boost function is to be executed and a partial range at which, upon the working assembly being operated, the preload boost function is not to be executed.
    Type: Grant
    Filed: June 22, 2017
    Date of Patent: August 21, 2018
    Assignee: SUMITOMO(S.H.I.) CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Hideto Magaki, Kiminori Sano, Ryuji Shiratani
  • Patent number: 10047495
    Abstract: A loader control system includes: a boom position calculation unit configured to calculate a position of a boom rotatably supported by a vehicle body of a loader; a bucket attitude calculation unit configured to calculate an attitude of a bucket rotatably supported by the boom; a determination unit configured to determine whether the attitude satisfies a predetermined condition on the basis of the attitude and a reference attitude of the bucket in dumping movement; and a work machine control unit configured to cause the bucket to carry out the dumping movement, and output a control signal to cause the boom to carry out lifting movement when the attitude is determined to satisfy the predetermined condition.
    Type: Grant
    Filed: October 28, 2016
    Date of Patent: August 14, 2018
    Assignee: Komatsu Ltd.
    Inventors: Masaaki Imaizumi, Ken Hirabayashi, Satoshi Kousuge
  • Patent number: 10036137
    Abstract: A hauling machine is disclosed. The hauling machine may include a dump body and an inertial measurement unit (IMU) disposed proximate to the dump body. The IMU may be configured to measure an impact of a payload material on the dump body during a first load cycle, and generate impact data based on the impact of the payload material. The hauling machine may also include a controller in operative communication with the IMU. The controller may be configured to: receive the impact data from the IMU, estimate a center of gravity, a net load, and an amplitude of the impact of the payload material based on the impact data, and determine a desired dumping point of the payload material into the dump body for a second load cycle based on the center of gravity, the net load, and the amplitude of the impact.
    Type: Grant
    Filed: July 15, 2016
    Date of Patent: July 31, 2018
    Assignee: Caterpillar Inc.
    Inventors: Xinyu Ge, Jia Li, Hao Wu
  • Patent number: 10030363
    Abstract: A hybrid work machine has an engine, an assist motor, a hydraulic pump which is driven by the total torque of the engine and the assist motor, and an electric storage device which accumulates electric power generated by the assist motor and supplies the electric power when the assist motor performs electric discharge. The continuous electric discharge from the electric storage device due to continuous operation at high load pressure can be suppressed without an operator experiencing an unusual operational characteristic. To this end, a pump flow rate correction control unit judges whether each hydraulic pump is in a high load operation state or not based on the output horsepower and/or the delivery pressure of each hydraulic pump and performs control such that the delivery flow rate gradually decreases when the hydraulic pump is in the high load operation state and this state continues beyond a predetermined time.
    Type: Grant
    Filed: February 10, 2016
    Date of Patent: July 24, 2018
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Shinya Imura, Shinji Nishikawa, Masafumi Hita, Hiroaki Amano
  • Patent number: 10024032
    Abstract: The work machine includes a stabilization control calculation unit that calculates and outputs a gradual stoppage command for making a drive actuator stop gradually and an operation speed limitation command for limiting an upper limit operation speed according to the status of stability of the work machine, a stoppage characteristic modification unit that corrects pilot pressure so as to make the drive actuator stop gradually when a stoppage operation is performed on a control lever, and an operation speed limitation unit that corrects the pilot pressure so as to limit the operation speed of the drive actuator.
    Type: Grant
    Filed: June 15, 2016
    Date of Patent: July 17, 2018
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Mariko Mizuochi, Akinori Ishii, Kazuyoshi Hanakawa
  • Patent number: 9938694
    Abstract: A control device for a work machine is a device for controlling a working unit of a work machine to excavate an object to be excavated. The control device includes a control unit for controlling the working unit to prevent a working implement of the working unit from crossing a predetermined target profile, and a switching unit for defining the target profile as an offset profile separated by a predetermined distance from a target excavation profile that is a target profile for finishing of the object to be excavated or the target excavation profile, based on an attitude of the working implement relative to the target excavation profile.
    Type: Grant
    Filed: March 29, 2016
    Date of Patent: April 10, 2018
    Assignee: Komatsu Ltd.
    Inventors: Toru Matsuyama, Yuki Shimano, Masashi Ichihara, Yoshiki Kami
  • Patent number: 9904747
    Abstract: Novel tools and techniques might provide for implementing mass haul optimization for agricultural terrain forming, based at least in part on three-dimensional soil modeling. In some embodiments, a computer system might determine desired soil conditions (including minimum topsoil depth, maximum and minimum slope, etc.) for an agricultural area. The computer system might also identify, based on 3-D topographical surveys and 3-D soil profiles, deficient locations within the agricultural area that do not possess at least the minimum topsoil depth, excess locations that possess greater than the minimum topsoil depth, sloped locations that exceed the maximum slope, and/or flat locations whose slopes are less than the minimum slope. Costs and volumes of topsoil and/or subsurface material may be calculated, and based on such calculations it may be determined how much topsoil and/or subsurface material to relocate or order to achieve the desired topsoil depth and slope at the identified locations.
    Type: Grant
    Filed: March 19, 2015
    Date of Patent: February 27, 2018
    Assignee: Trimble Inc.
    Inventors: Joshua W. Shuler, Christopher van der Loo
  • Patent number: 9878886
    Abstract: A hydraulic circuit for use on a construction machine includes a first valve, a second valve, and at least a third valve. The second and third valve each includes at least one inlet port connected to a first outlet port of the first valve. The first outlet port of each of the second and third valves are configured to reduce a first pressure to a second pressure and/or a third pressure downstream of the second valve and the third valve, respectively. The second valve and the third valve also include at least a second outlet port connected to a reservoir tank. A hydraulic motor is connected to the first outlet port of the second valve, which operates the hydraulic motor in a first direction. The hydraulic motor also is connected to the first outlet port of the third valve, which operates the hydraulic motor in a second direction.
    Type: Grant
    Filed: March 3, 2015
    Date of Patent: January 30, 2018
    Assignee: MANITOWOC CRANE COMPANIES, LLC
    Inventors: John F. Benton, Mark A. Harbold, Todd Snider, David R. Peiffer
  • Patent number: 9856628
    Abstract: A control system controls a construction machine having a work machine including a tilting bucket. The control system includes: a first acquisition unit configured to acquire dimension data; a second acquisition unit configured to acquire external shape data of the bucket; a third acquisition unit configured to acquire target excavation landform data indicating a target excavation landform that is a two-dimensional target shape of an excavation object on a work machine operation plane perpendicular to a bucket axis; a fourth acquisition unit configured to acquire work machine angle data; a fifth acquisition unit configured to acquire tilt angle data indicating a turning angle of the bucket; and a calculation unit configured to obtain two-dimensional bucket data indicating an external shape of the bucket on the work machine operation plane on the basis of the dimension data, the external shape data, the work machine angle data, and the tilt angle data.
    Type: Grant
    Filed: June 2, 2014
    Date of Patent: January 2, 2018
    Assignee: Komatsu Ltd.
    Inventors: Jin Kitajima, Kazuki Takehara
  • Patent number: 9856662
    Abstract: A large manipulator includes a chassis, at least two front support arms, and at least two rear support arms. The support arms are coupled to corresponding extendable support legs that are each coupled to the chassis and that are each configured to be extended between a travel position and a support position. The large manipulator further includes a mast arm with a turntable coupled to the chassis. An operating range of the mast arm is dependent upon the support positions of the extendable support arms. The large manipulator further includes a computer with a monitor and a program-controlled positioning aid. The positioning aid is configured to generate a graphical representation of surrounding image data on the monitor. The operating range of the mast arm is visualized in the graphical representation.
    Type: Grant
    Filed: June 24, 2015
    Date of Patent: January 2, 2018
    Assignee: SCHWING GmbH
    Inventors: Reiner Vierkotten, Joseph Schnittker
  • Patent number: 9835187
    Abstract: A control system for a construction machine includes: a boom cylinder; a boom switching valve; a fluid pressure motor adapted to drive a motor generator by being rotated by means of a return fluid guided from a piston side chamber; a regeneration control valve adapted to adjust a first supply amount serving as a supply amount of a working fluid supplied from the piston side chamber to the boom switching valve, and a second supply amount serving as a supply amount of the working fluid supplied from the piston side chamber to the fluid pressure motor; and a controller adapted to control the regeneration control valve so that the second supply amount becomes smaller than the first supply amount in a case where a stroke amount of a spool becomes an upper limit value or more.
    Type: Grant
    Filed: July 23, 2013
    Date of Patent: December 5, 2017
    Assignee: KYB Corporation
    Inventors: Masahiro Egawa, Haruhiko Kawasaki, Yasuhiro Yonehara
  • Patent number: 9832386
    Abstract: An external recognition apparatus and an excavation machine using the external recognition apparatus, the external recognition apparatus including: a three-dimensional distance measurement device configured to acquire distance information in a three-dimensional space in a predetermined, region which is under a hydraulic shovel and which includes a region to be excavated by the hydraulic shovel; a plane surface estimation unit configured to estimate a plane surface in the predetermined region based on the distance information; and an excavation object region recognition unit configured to recognize the region to be excavated in the predetermined region based on the plane surface and the distance information.
    Type: Grant
    Filed: June 12, 2015
    Date of Patent: November 28, 2017
    Assignee: Hitachi, Ltd.
    Inventors: Noriyasu Hasejima, Shigeru Matsuo
  • Patent number: 9822510
    Abstract: To provide a construction machine that appropriately sets the magnitude of an engine output for each work mode. A construction machine according to the present invention includes: an engine (22); a generator-motor (23) configured to generate electric power by the engine; a hydraulic pump (41) configured to be driven by the engine and the generator-motor; a hydraulic actuator (32, 34, 36) that drives and operates a working device (30) with the power of the hydraulic pump; an electric storage device (24) for supplying electric power to drive the generator-motor and charging the electric power generated by the generator-motor; a work-mode selecting device (45, 46) that selects a work mode corresponding to operation of an operator; and an engine-output setting unit (403, 405, 407) that sets the magnitude of the output of the engine corresponding to the work mode selected by the work-mode selecting device.
    Type: Grant
    Filed: March 5, 2014
    Date of Patent: November 21, 2017
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Hiroshi Sakamoto, Masatoshi Hoshino, Shinji Ishihara
  • Patent number: 9803338
    Abstract: A hydraulic system including an accumulator and a hydraulic transformer is disclosed. The hydraulic transformer includes first and second variable displacement pump/motor units mounted on a rotatable shaft. The rotatable shaft has an end adapted for connection to an external load. The first variable displacement pump/motor unit includes a first side that fluidly connects to a pump and a second side that fluidly connects to a tank. The second variable displacement pump/motor unit includes a first side that fluidly connects to the accumulator and a second side that fluidly connects with the tank.
    Type: Grant
    Filed: August 10, 2012
    Date of Patent: October 31, 2017
    Assignee: Eaton Corporation
    Inventor: Aaron Hertzel Jagoda
  • Patent number: 9783952
    Abstract: A working machine includes: an operation state detection unit configured to detect a physical amount output according to an operation of an operation lever; a time integration unit configured to calculate a time integration value by performing time integration of the physical amount; a determination unit configured to cause the time integration value and a predetermined operating angle of an excavating and loading mechanism associated with the operation of the operation lever to correspond to each other, and to determine that the operation of the operation lever has been performed at a time the time integration value becomes a predetermined integration value or more; and a counting unit configured to count at a time operations of the excavating and loading mechanism determined by the determination unit are performed in a predetermined order, number of times of excavating and loading work.
    Type: Grant
    Filed: November 12, 2013
    Date of Patent: October 10, 2017
    Assignee: Komatsu Ltd.
    Inventors: Atsushi Nagato, Masamichi Ueda
  • Patent number: 9746329
    Abstract: Systems and methods for augmenting an inertial navigation system (INS) include outputting from the INS position information associated with the implement and adjusting the implement based upon a comparison of the position information of the implement and a desired position of the implement. The INS is periodically re-initialized using error estimates generated by a kalman filter as a function of position information from one or more positioning (or measuring) devices, such as a fan laser, an automatic total station (ATS), a GNSS receiver, or a ground based radio positioning system, to correct a drift of the position information that may be caused by inherent characteristics of the INS.
    Type: Grant
    Filed: November 8, 2006
    Date of Patent: August 29, 2017
    Assignee: Caterpillar Trimble Control Technologies LLC
    Inventors: Mark Edward Nichols, Adam John Gudat, Richard Piekutowski
  • Patent number: 9725879
    Abstract: The invention concerns a portable power supply system (30) intended to supply a remotely controlled, electrically driven work machine (1) with electrical power, where the work machine is of the type that demonstrates a propulsion means that includes continuous tracks (8b) and is equipped with a maneuverable arm (10) intended to carry a tool at its free end, and electric motor (19) that is connected to a hydraulic pump (20) and is intended to supply the operating means (8c, 10a) of the machine with a hydraulic medium, whereby the work machine is intended to be connected under normal operation to a primary source of power (30a) via an electrical cable (2?), which primary source of power includes a fixed alternating current electricity distribution grid at the location.
    Type: Grant
    Filed: April 19, 2013
    Date of Patent: August 8, 2017
    Assignee: BROKK AKTIEBOLAG
    Inventor: Gunnar Bystedt
  • Patent number: 9719498
    Abstract: An energy recovery system for a first machine includes a cylinder member, and a piston slidably disposed in the cylinder member and operatively coupled to a frame of the first machine. The piston and the cylinder member together define a chamber configured to receive a hydraulic fluid. The energy recovery system includes an accumulator in fluid communication with the chamber and a first valve assembly for regulating a flow of the hydraulic fluid from the chamber to the accumulator. The energy recovery system includes a controller configured to receive a signal indicative of a parameter of a payload that is to be received from a second machine during a work cycle thereof. The controller is configured to control the first valve assembly, during the work cycle of the second machine, to at least partially open the fluid communication between the chamber and the accumulator based on the received signal.
    Type: Grant
    Filed: May 29, 2015
    Date of Patent: August 1, 2017
    Assignee: Caterpillar Inc.
    Inventor: Xinyu Ge
  • Patent number: 9617714
    Abstract: The hybrid constructions machine has an engine rotation speed sensor 11A to detect a rotation speed NE of an engine 11, an engine state determination unit 20B to determine the state of output torque TE of the engine 11, a load torque estimation unit 20C to calculate load torque TP of a hydraulic pump 13, and an engine assistance limiting unit 20E to, when the rotation speed NE detected with the engine rotation speed sensor 11A is equal to or greater than a rotation speed N0, and the engine state determination unit 20B determines that the output torque TE of the engine 11 has not become minimum torque Tmin, or the load torque TP calculated with the load torque estimation unit 20C is lower than torque T1, limit motive-power assistance with the motor generator 12 to the engine 11.
    Type: Grant
    Filed: April 17, 2015
    Date of Patent: April 11, 2017
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Shinji Ishihara, Masatoshi Hoshino, Kentarou Itoga, Hidekazu Moriki
  • Patent number: 9598842
    Abstract: Provided is construction machinery that is capable of greatly reducing the amount of fuel consumption by making effective use of recovered energy. The construction machinery has a first hydraulic pump 3 for discharging hydraulic oil for driving an actuator 6, a second hydraulic pump 9, a second prime mover 7 for driving the second hydraulic pump 9, energy storage device 8 for storing energy for driving the second prime mover 7, and a hydraulic oil supply circuit 10 including a hydraulic oil switching section 11c that accepts the hydraulic oil discharged from the first hydraulic pump and the hydraulic oil discharged from the second hydraulic pump and supplies either the mixture of the accepted hydraulic oils or a selected one of the accepted hydraulic oils to the actuator 6.
    Type: Grant
    Filed: February 5, 2013
    Date of Patent: March 21, 2017
    Assignee: HITACHI CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Shinya Imura, Hidetoshi Satake, Kouji Ishikawa, Seiji Hijikata, Tomoaki Kaneta
  • Patent number: 9587369
    Abstract: An excavation system is disclosed for a machine having a work tool. The excavation system may have a speed sensor to detect a travel speed of the machine and a load sensor to detect loading of the work tool. The excavation system may also have a controller configured to detect engagement of the work tool with a material pile based on at least one of the first signal and the second signal. The controller may also be configured to select at least one tilt control parameter value for the work tool and operate the work tool based on the selected tilt control parameter value to load the work tool with an amount of material. The controller may be configured to determine whether the amount of material exceeds a target amount and to cause the machine to withdraw from the material pile when the amount exceeds the target amount.
    Type: Grant
    Filed: July 2, 2015
    Date of Patent: March 7, 2017
    Assignee: Caterpillar Inc.
    Inventors: Jeffrey Graham Fletcher, Daniel Aaron Jones, Ranishka De Silva Hewavisenthi, Ricky Kam Ho Chow
  • Patent number: 9587378
    Abstract: An auto-powered mobile machine with controls for a riding operator and a system for carrying and making efficient use of a variety of attachable tools. Wireless radio communication from the controls to a lower tool may allow the swivel to spin any number of times without limitation. Hydraulic tool position controls are wirelessly coupled to a remote sensor that responds to a string datum line, a curb, direction of gravity, or GPS data.
    Type: Grant
    Filed: June 5, 2015
    Date of Patent: March 7, 2017
    Inventor: Stephen T Schmidt
  • Patent number: 9493928
    Abstract: The present disclosure relates to a method and an apparatus for controlling an engine of a wheel loader, and the apparatus includes: a sensor unit, configured to sense vehicle information and working machine information; a vehicle control unit configured to select a working condition according to a priority of the vehicle information and the working machine information, select an engine mode corresponding to the selected working condition, and output an engine mode signal representing the selected engine mode; and an engine control unit configured to control the engine output according to the engine mode signal output from the vehicle control unit. Accordingly, the present disclosure provides the method and the apparatus for controlling an engine according to a working condition of a wheel loader, thereby smoothly maintaining performance of equipment without requiring a separate manipulation by a worker, and thus achieving an effect of improving fuel efficiency.
    Type: Grant
    Filed: December 4, 2013
    Date of Patent: November 15, 2016
    Assignee: Doosan Infracore Co., Ltd.
    Inventors: Kwang Seok Park, Yun Jung Choi
  • Patent number: 9481976
    Abstract: A work vehicle includes a boom, an arm, a bucket, an arm control member, a speed limit determination portion, and a target speed determination portion. The speed limit determination portion determines a speed limit for limiting a speed of a cutting edge of the bucket in accordance with a distance between a cutting edge and a design surface. The target speed determination portion determines a target speed of the boom based on the speed limit. The speed limit determination portion decides on a speed limit calculated based on correlation between the speed limit and the distance between the design surface and the cutting edge when an amount of operation of the arm control member is equal to or greater than a prescribed amount and decides on a speed limit lower than the speed limit calculated based on the correlation when the amount of operation is smaller than the prescribed amount.
    Type: Grant
    Filed: September 10, 2014
    Date of Patent: November 1, 2016
    Assignee: KOMATSU LTD.
    Inventors: Yoshiki Kami, Takeo Yamada, Yuto Fujii, Takeshi Takaura
  • Patent number: 9458597
    Abstract: A control system includes: a control valve control unit that controls a control valve; a data acquisition unit that acquires data on an operation command value and a cylinder speed in a state where an operation command for operating a hydraulic cylinder is output; and a deriving unit that derives operation characteristics in an operation direction of each of a plurality of hydraulic cylinders in relation to the operation command value based on the data acquired by the data acquisition unit. In acquisition of the data by the data acquisition unit, the control valve control unit controls a control valve of one pilot oil passage that is an acquisition object where the data is acquired among the plurality of pilot oil passages to open one pilot oil passage and controls control valves of the other pilot oil passages to close the other pilot oil passages.
    Type: Grant
    Filed: March 24, 2015
    Date of Patent: October 4, 2016
    Assignee: Kmoatsu Ltd.
    Inventors: Katsuhiro Ikegami, Satoshi Ito, Akinori Baba
  • Patent number: 9422692
    Abstract: Embodiments of the present invention are directed to systems for performing non-contact based determination of the position of an implement. In one embodiment, a non-contact based measurement system is used to determine the relative position of an implement coupled with a mobile machine. The geographic position of the mobile machine is determined and the geographic position of said implement based upon the geographic position of the mobile machine and the position of the implement relative to the mobile machine.
    Type: Grant
    Filed: March 12, 2013
    Date of Patent: August 23, 2016
    Assignee: Caterpillar Trimble Control Technologies LLC
    Inventors: Arthur James Taylor, Mark Nichols, Philip Jackson
  • Patent number: 9377034
    Abstract: Provided is a load sensing system for controlling a discharge pressure of the hydraulic pump so as to render a differential pressure obtained by subtracting a maximum load pressure among the hydraulic actuators from a discharge pressure of the hydraulic pump to be a constant pressure, and there are provided: a first load pressure flow passage which introduces load pressures of the hydraulic actuators to be outputted to a PLS transmission line which transmits the maximum load pressure among the hydraulic actuators at the time of activating the hydraulic actuators; and a second load pressure flow passage which is a flow path for introducing the load pressures of the hydraulic actuators to be outputted to the PLS transmission line during operation after activations of the hydraulic actuators, and wherein a flow rate of the pressure oil therein is reduced than that in the first load pressure flow passage.
    Type: Grant
    Filed: December 11, 2012
    Date of Patent: June 28, 2016
    Assignee: KUBOTA CORPORATION
    Inventor: Hiroshi Horii
  • Patent number: 9371626
    Abstract: A work vehicle includes a speed limit calculation portion, a speed determination portion, an adjustment portion, and a boom speed determination portion. The speed limit calculation portion calculates a speed limit for limiting a speed of a cutting edge of a bucket. The speed determination portion determines whether or not a speed of raising the boom has been lowered when an amount of operation of an arm is smaller than a prescribed amount. The adjustment portion delays speed change to the speed limit. The boom speed determination portion determines a target speed of the boom based on the speed limit after delay by the adjustment portion when it is determined that the speed of raising the boom has been lowered, and determines a target speed of the boom based on the speed limit calculated when it is not determined that the speed of raising the boom has been lowered.
    Type: Grant
    Filed: September 10, 2014
    Date of Patent: June 21, 2016
    Assignee: KOMATSU LTD.
    Inventors: Yoshiki Kami, Takeo Yamada, Toru Matsuyama, Yuto Fujii, Takeshi Takaura
  • Patent number: 9340953
    Abstract: Provided is a construction machine which is capable of suppressing useless power consumption. This construction machine is provided with an excavator body, a working device which is attached to the excavator body, an engine which is mounted in the excavator body, a generator motor which is attached to the engine and which can be driven as an electric generator or an electric motor, a hydraulic pump which is driven by the engine and the generator motor, a hydraulic actuator which drives the working device with motive power generated by the hydraulic pump, and a control portion which lowers the drive output of the generator motor in accordance with the drive state of the working device and limits the drive output of the hydraulic pump in order to keep the rotation frequency of the engine within a range of predetermined values.
    Type: Grant
    Filed: June 19, 2013
    Date of Patent: May 17, 2016
    Assignee: HITACHI CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Hiroshi Sakamoto, Masatoshi Hoshino, Shinji Ishihara
  • Patent number: 9309650
    Abstract: A working machine includes: an operation state detection unit configured to detect a physical amount output according to an operation of an operation lever; a time integration unit configured to calculate a time integration value by performing time integration of the physical amount; a determination unit configured to cause the time integration value and a predetermined operating angle of an excavating and loading mechanism associated with the operation of the operation lever to correspond to each other, and to determine that the operation of the operation lever has been performed, at a time the time integration value becomes a predetermined integration value or more; and a counting unit configured to count number of times of a series of excavating and loading work.
    Type: Grant
    Filed: November 7, 2013
    Date of Patent: April 12, 2016
    Assignee: Komatsu Ltd.
    Inventors: Atsushi Nagato, Tsuyoshi Imamura, Hiromi Tokura
  • Patent number: 9297145
    Abstract: An excavation system includes a work tool, and linkage connecting the work tool to the machine. The excavation system also includes at least one sensor configured to generate a signal indicative of an angle of the linkage, a display, and a controller in communication with the at least one sensor and the display. The controller is configured to selectively cause the display to notify a user of the excavation system when the angle of the linkage is within a desired material penetration range of angles.
    Type: Grant
    Filed: May 1, 2014
    Date of Patent: March 29, 2016
    Assignee: Caterpillar Inc.
    Inventors: Jeffrey Stephen Alig, Brad Robert Van De Veer, Yongliang Zhu
  • Patent number: 9284714
    Abstract: There is provided a hydraulic excavator in which invasion of a design surface by a work implement can be suppressed. A boom-lowering proportional solenoid valve is provided in a boom-lowering pilot conduit connected to a boom-lowering pilot port. A first pressure sensor detects a pressure generated in the boom-lowering pilot conduit between a control lever and the boom-lowering proportional solenoid valve. A controller controls an opening degree of the boom-lowering proportional solenoid valve based on the pressure detected by the first pressure sensor. The controller gently increases, from zero, a current value outputted to the boom-lowering proportional solenoid valve.
    Type: Grant
    Filed: April 24, 2014
    Date of Patent: March 15, 2016
    Assignee: KOMATSU LTD.
    Inventor: Takeshi Takaura
  • Patent number: 9194139
    Abstract: The disclosure relates generally to the field of boom-type engineering machinery, which discloses particularly an engine speed control method used to control an output speed of an engine of a boom-type engineering machine during a boom action including: detecting a load pressure of a hydraulic system and a moving speed of a boom; determining a target speed of the engine according to the load pressure and the moving speed of the boom, by a central control unit; and sending, by the central control unit, the target speed of the engine to an engine control unit, and performing, by the engine control unit, a speed closed-loop adjustment according to a current speed value fed back by the engine, so that a current speed of the engine is consistent with the target speed of the engine. Further aspects are an engine speed control system and a boom-type engineering machine equipped therewith.
    Type: Grant
    Filed: December 26, 2013
    Date of Patent: November 24, 2015
    Assignees: HUNAN SANY INTELLIGENT CONTROL EQUIPMENT CO., LTD, SANY HEAVY INDUSTRY CO., LTD
    Inventors: Xiaogang Yi, Dongliang Pu, Qiang Liu
  • Patent number: 9194106
    Abstract: A working unit control system includes a working unit, an operating tool, a work type determining part, and a drive controlling part. The operating tool is configured to receive a user operation to drive the working unit, and to output an operation signal in accordance with the user operation. The work type determining part is configured to determine to which of a shaping work and a cutting edge aligning work a work type of the working unit corresponds based on the operation signals. The drive controlling part configured to move the bucket along a designed surface when the work type corresponds to the shaping work, the drive controlling art being configured in a predetermined position set with reference to the designed surface when the work type corresponds to the cutting edge aligning work, the designed surface indicating a target shape of an excavation object.
    Type: Grant
    Filed: February 7, 2012
    Date of Patent: November 24, 2015
    Assignee: KOMATSU LTD.
    Inventor: Toru Matsuyama
  • Patent number: 9181676
    Abstract: The present disclosure provides a foot control pattern for operably controlling an electrohydraulic machine. The machine includes a cab, ground engaging mechanisms, a boom, and a bucket. The foot control pattern includes a machine controller having a plurality of inputs. A first foot control is electrically coupled to a first of the plurality of inputs, where the first foot control is adapted to control the boom. A second foot control is electrically coupled to a second of the plurality of inputs, where the second foot control is adapted to control the bucket. A first hand control is electrically coupled to a third of the plurality of inputs, where the first hand control is adapted to propel and steer the machine.
    Type: Grant
    Filed: January 11, 2013
    Date of Patent: November 10, 2015
    Assignee: DEERE & COMPANY
    Inventors: Scott Meislahn, Sean A. Mairet
  • Patent number: 9173337
    Abstract: A GNSS system in combination with a hydraulically-actuated, airborne dispenser for a dry material crop dusting system to optimize the distribution of dry materials over a particular tract of land. A GNSS subsystem is included using at least one GNSS antenna and one GNSS receiver located on the aircraft. The aircraft is equipped with an electronic/hydraulic crop dusting subsystem connected to a GNSS CPU. The GNSS ranging signals received by the antennas are processed by a receiver and processor system for determining the vehicle's position and dynamic attitude in three dimensions (3D). The system is adapted for operation in a differential GNSS (DGNSS) mode utilizing a base station at a fixed location.
    Type: Grant
    Filed: October 1, 2013
    Date of Patent: November 3, 2015
    Assignee: EFC SYSTEMS, Inc.
    Inventors: Greg S. Guyette, Jeffrey Allen Dearborn
  • Patent number: 9157202
    Abstract: A snow plow includes a control unit for raising an auger housing to a predetermined upper limit angle when travel device is reversing, and an acceleration sensor for detecting acceleration produced in the auger housing. The control unit determines an angle of inclination of the auger housing on the basis of the acceleration. When the travel device starts moving forward after having temporarily moved in reverse, the control unit sets an intermediate lowering target angle of inclination, which is in the lowering path of the auger housing from the upper limit angle to a pre-reversing angle of inclination, in accordance with the forward acceleration; lowers the auger housing at a given lowering speed from the upper limit angle to the intermediate lowering target angle of inclination; and lowers the auger housing at a gradually decreasing lowering speed from the intermediate lowering target angle of inclination to the pre-reversing angle of inclination.
    Type: Grant
    Filed: October 20, 2014
    Date of Patent: October 13, 2015
    Inventors: Jun Fukano, Tsutomu Mizoroke, Shinsaku Nakayama