Condition Responsive Control Of Motive Fluid Flow Patents (Class 60/459)
  • Patent number: 10495222
    Abstract: A control device for an automatic transmission includes: a transmission gear ratio control section configured to control the transmission gear ratio so that a rotation speed of the output element rapidly becomes closer to a rotation speed of the internal combustion engine, a first engagement control section configured to perform a first engagement control to be brought to the full engagement state after the rotation of the internal combustion engine is increased in the slip engagement state while a torque transmission capacity of the lockup clutch is increased when the lockup clutch is switched through the slip engagement state to the full engagement state by an ON operation of an accelerator of the vehicle, the transmission gear ratio control being prohibited during the first engagement control by the first engagement control section.
    Type: Grant
    Filed: February 22, 2016
    Date of Patent: December 3, 2019
    Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.
    Inventors: Kohei Kamiya, Tomoaki Honma, Yasuhiro Endo
  • Patent number: 10465361
    Abstract: An auxiliary flow adjustment system and method are disclosed for controlling an auxiliary hydraulic function on a machine in accordance with commands from an operator. The auxiliary flow adjustment system includes operator controls that control a hydraulic control valve. The control valve controls flow rate and flow direction to the auxiliary hydraulic function. When the auxiliary flow adjustment system is activated, the operator can use the operator controls to select a desired flow rate and flow direction for the auxiliary function and maintain the desired flow rate and direction without further use of the operator controls. When the flow adjustment system is activated while a non-zero flow rate is selected, the desired flow rate and direction can be set to the current settings. A resume control can retrieve and command the previously stored desired flow rate and direction. Controls can be used to increase and decrease the set flow rate.
    Type: Grant
    Filed: November 3, 2016
    Date of Patent: November 5, 2019
    Assignee: DEERE & COMPANY
    Inventors: Sean A. Mairet, Thomas J. Waller, Bryan Rausch, Daniel A. Griswold
  • Patent number: 10457534
    Abstract: A heavy-duty lift truck designed as a mast-based apparatus comprising a mast, a load accepting means is mounted on the mast in such a way that it can be raised and lowered, and the heavy-duty lift truck is designed at least for a load capacity of 8 tons, with the heavy-duty lift truck comprising a powertrain with a travel drive that comprises an electric drive unit whereby the heavy-duty lift truck has greater energy efficiency.
    Type: Grant
    Filed: October 27, 2016
    Date of Patent: October 29, 2019
    Assignee: Konecranes Global Corporation
    Inventors: Mike Hegewald, Lars Michael Theiβen, Heinz Ishorst
  • Patent number: 10443629
    Abstract: An operation device includes: an operating unit; a pilot valve that outputs a pilot pressure corresponding to an operating amount of the operating unit; an operating amount detection sensor that outputs an operating amount signal corresponding to the operating amount of the operating unit; a first bar code provided on the pilot valve and containing pilot pressure actual measurement information indicating a relationship between the operating amount of the operating unit and an actual measurement value of the pilot pressure outputted from the pilot valve; and a second bar code provided on the pilot valve and containing operating amount signal actual measurement information indicating a relationship between the operating amount of the operating unit and an actual measurement value of the operating amount signal outputted from the operating amount detection sensor.
    Type: Grant
    Filed: November 24, 2017
    Date of Patent: October 15, 2019
    Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Akihiro Kondo, Hiroaki Shimizu
  • Patent number: 9945396
    Abstract: A fluid system for a machine that includes a linkage. The fluid system includes an actuator, an accumulator, a pilot circuit, and a pressure reducing valve. The actuator is configured to manipulate the linkage. The accumulator is configured to store a fluid discharged by the actuator under pressure. The pilot circuit is fluidly coupled to the accumulator and is configured to receive the fluid from the accumulator. Further, the pressure reducing valve is positioned between the accumulator and the pilot circuit to regulate the pressure of the fluid delivered to the pilot circuit from the accumulator.
    Type: Grant
    Filed: February 23, 2016
    Date of Patent: April 17, 2018
    Assignee: Caterpillar Inc.
    Inventors: Tonglin Shang, Aleksandar Egelja, Kalpesh Patel, Jiao Zhang, Pengfei Ma, Dayao Chen
  • Patent number: 9897112
    Abstract: A method and system is provided for controlling a hydraulic actuator in a work machine by opening a load holding valve in a measured fashion in order to leak hydraulic pressure back into a depressurized portion of the hydraulic circuit, thereby minimizing or eliminating jerkiness in the actuator when the actuator is under an external load.
    Type: Grant
    Filed: November 7, 2013
    Date of Patent: February 20, 2018
    Assignee: Parker-Hannifin Corporation
    Inventors: Ralf Gomm, Dale Vanderlaan
  • Patent number: 9803714
    Abstract: In a hydraulic system which is biased to a minimum system pressure using a bias valve or other flow obstruction disposed in a tank line, there is provided in a bypass line to the bias valve an evacuating and filling valve through which the hydraulic system is first evacuatable and subsequently fillable with a hydraulic fluid. The valve closes the bypass when a differential pressure overcomes a preadjusted force of a spring element. For this purpose, the valve possesses a displaceably mounted valve body with an integrated throttle and a seal face which closes a through opening when the valve body is shifted against the bias force of the spring element due to the pressure difference.
    Type: Grant
    Filed: May 12, 2015
    Date of Patent: October 31, 2017
    Assignee: Rausch & Pausch GmbH
    Inventors: Tim Rubitzko, Frank Lauterbach
  • Patent number: 9482234
    Abstract: Provided is a construction machine including an engine, a hydraulic pump with a supercharger, and a hydraulic actuator, being capable of attaining both of a quick rise of engine speed and an operation of the hydraulic actuator during the rise of the engine speed. The construction machine further includes a supercharging pressure detector to detect a supercharging pressure of the supercharger and a controller to control absorption torque of the hydraulic pump, namely, pump torque. Until engine speed of the engine reaches target engine speed, the controller calculates target pump torque from a predetermined relationship between engine no-load speed and the target pump torque, corrects the target pump torque so as to make it smaller as the detected supercharging pressure is lower, and limits actual pump torque to the corrected target pump torque, until engine speed reaches target engine speed from engine speed lower than the target engine speed.
    Type: Grant
    Filed: February 19, 2014
    Date of Patent: November 1, 2016
    Assignee: KOBELCO CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Kazuomi Endo, Koichiro Mori
  • Patent number: 9394897
    Abstract: The pumps and pressure controllers described herein aim to pump fluid in two directions, such as from a first port to a second port and vice versa. The pressure controllers aim to control pressure in a system or device, such as a test device, accurately and precisely at a variety of different pressure levels. Generally described, the pumps and pressure controllers described herein may include two or more control valves, which may be actuatable in such a manner so that the pump or pressure controller can switch between operating as a vacuum pump and operating as a compressor. In some embodiments, the pressure controllers may be able to adjust a pressure in the device by small increments thereby providing increased control of the pressure in the device over the prior art. Furthermore, the pressure controllers may be able to control the pressure of a system having low pressure levels.
    Type: Grant
    Filed: September 14, 2015
    Date of Patent: July 19, 2016
    Assignee: Fluke Corporation
    Inventors: Tom Lohkamp, Bill Stephens, Martin Gotch
  • Patent number: 9376297
    Abstract: Reach truck 1 with a control system 2 for controlling the lowering movement of a fork 10, the control system 2 comprising a height sensor 20, for determining the lifting height h of the fork 10 of the reach truck 1, a proportional electrical hydraulic valve 50 connected to a lifting cylinder 70 of the reach truck 1, for controlling an oil flow of the lifting cylinder 70, and a control unit 30, connected to the height sensor 20 for receiving the actual lifting height h signal and controlling the proportional electrical hydraulic valve 50, wherein the control unit 30 automatically decreases the maximum lowering speed v of the fork 10, by controlling the proportional electrical hydraulic valve 50, according a predetermined maximum speed v curve depending on the lifting height h of the fork 10, and in some embodiments only on the lifting height h of the fork 10, such that the fork 10 is softly stopped at the ground.
    Type: Grant
    Filed: October 6, 2014
    Date of Patent: June 28, 2016
    Assignee: HYSTER-YALE GROUP, INC.
    Inventor: Michael Hoock
  • Publication number: 20150135694
    Abstract: A gearbox hydraulic circuit includes a hydraulic pump connected to a fluid reservoir to generate a flow of pressurised fluid. A pressure circuit connected to the hydraulic pump conveys the flow of pressurised fluid. A pressure control valve disposed in the pressure circuit between the first line and the second line of the pressure circuit maintains the pressure of the pressurised fluid in the first line. A shunt connected to the pressure circuit is operable to route the flow of pressurised fluid from the first line to the second line to reduce the pressure in the first line.
    Type: Application
    Filed: June 17, 2013
    Publication date: May 21, 2015
    Applicant: Turner Powertrain Systems Limited
    Inventor: John Wootton
  • Publication number: 20150128584
    Abstract: A hydraulic soft-start system includes a flow control valve which is in fluid communication with a pressure source and an inlet of a motor. The system includes a first flow restricting orifice and a second flow restricting orifice disposed between a pilot for actuating the flow control valve and the inlet of the motor. A first flow is passed from the pressure source via the first orifice to an inlet of the motor, placing the motor in a partially-actuated state. The flow control valve is actuated after a threshold pressure of the pilot is reached allowing a second flow to pass from the pressure source to the motor inlet. The second flow is higher than the first flow, thereby placing the motor in a fully-actuated state.
    Type: Application
    Filed: January 21, 2015
    Publication date: May 14, 2015
    Applicant: MARADYNE CORPORATION
    Inventors: Edmund Joseph Zaleski, Paul D. Ellsworth
  • Publication number: 20150121860
    Abstract: A hydraulic drive circuit is provided that can achieve high responsiveness, high precision, and high efficiency at a low cost in a hydraulic drive system popularly used in an industrial machine such as a press machine, a construction machine, and the like.
    Type: Application
    Filed: July 23, 2013
    Publication date: May 7, 2015
    Inventors: Sang-Ho Hyon, Harutsugu Mizui, Etsuhiro Mori
  • Patent number: 9010104
    Abstract: A fluid-working machine has a working chamber of cyclically varying volume, high and low pressure manifolds, and high and low pressure valves for regulating the flow of fluid between the working chamber and the high and low pressure manifolds respectively. A controller actively controls at least one said valve to determine the net displacement of working fluid of the working chamber on a cycle by cycle basis. At least one said valve is a variable timing valve and the controller causes the valve to open or close at a time determined taking into account one or more properties of the performance of the fluid working machine measured during an earlier cycle of working chamber volume.
    Type: Grant
    Filed: February 23, 2011
    Date of Patent: April 21, 2015
    Assignee: Artemis Intelligent Power Limited
    Inventors: William Hugh Salvin Rampen, Uwe Bernhard Pascal Stein, Niall James Caldwell, Stephen Michael Laird, Pierre Robert Joly, Michael Richard Fielding, Daniil Sergeevich Dumnov
  • Patent number: 9014934
    Abstract: A method of controlling a pump for a hybrid transmission includes commanding a first line pressure of the transmission and deriving a first torque value—an open-loop torque value—from the first line pressure command, and commanding the pump to operate at the first torque value. The method monitors actual speed of the pump and derives a second torque value—a closed-loop torque value—therefrom. A third torque value is derived from the first and second torque values, and the pump commanded to operate at the third torque value. A first speed value may be derived from the first line pressure command, and the second torque value derived from the difference between the monitored and the first speed values. Deriving the third torque value may include a substantially-linear combination of the first and second torque values.
    Type: Grant
    Filed: May 19, 2009
    Date of Patent: April 21, 2015
    Assignee: GM Global Technology Operations LLC
    Inventor: Jy-Jen F. Sah
  • Publication number: 20150096288
    Abstract: A thermal management system is provided. The thermal management system includes a first hydraulic system for circulating a first hydraulic fluid at a first temperature, a second hydraulic system for circulating a second hydraulic fluid at a second temperature that is higher than the first temperature, and a heat exchanger coupling the first hydraulic system to the second hydraulic system, wherein the heat exchanger is configured to exchange heat between the first hydraulic fluid and the second hydraulic fluid.
    Type: Application
    Filed: July 9, 2013
    Publication date: April 9, 2015
    Inventor: Jianmin Liao
  • Publication number: 20150074938
    Abstract: A hydraulic fluid flow management system and method includes three subsystems. The first subsystem is an engine mounted hydraulic fluid pump electrically operated flow control proportioning valve combination. The second subsystem is a hydraulic fluid flow distribution manifold assembly. The third subsystem is a computer operated controller and display which governs the operation of the electrically operated flow control proportioning valve combination.
    Type: Application
    Filed: October 30, 2014
    Publication date: March 19, 2015
    Applicant: ALAMO GROUP, INC.
    Inventors: Tracy Day, John Day
  • Patent number: 8972124
    Abstract: A work vehicle includes an engine, an idling stop execution portion, a determination portion, a counting portion, and an idling stop time period adjustment portion. The engine can rotate in a first idling state and a second idling state in which the engine rotates at the number of rotations higher than a prescribed number of rotations. The idling stop execution portion performs an idling stop operation for stopping the engine. The determination portion determines whether or not stop has been made from the second idling state. The counting portion counts the number of times of stop of the engine from the second idling state. An idling stop time period adjustment portion makes a prescribed time period of the second idling state longer than a current time period, when the number of times of stop of the engine is equal to or greater than the prescribed number of times.
    Type: Grant
    Filed: July 22, 2013
    Date of Patent: March 3, 2015
    Assignee: Komatsu Ltd.
    Inventors: Tadashi Mori, Jin Yogita
  • Patent number: 8943818
    Abstract: A hydraulic device includes a switch-over valve 1140 provided at a section of a sub-passage 1105 located downstream of a location where a first bypass passage 1117 is connected and located upstream of a primary regulator 1110. The switch-over valve 1140 is switched between a blocked state, where supply of hydraulic oil to a section of the sub-passage 1105 located downstream of the switch-over valve 1140 is blocked, and a communication state, where supply of hydraulic oil to the section of the sub-passage 1105 located downstream of the switch-over valve 1140 is permitted. In the hydraulic device, when the switch-over valve 1140 is switched to the communication state, as a discharge performance of a main pump 1102 increases, a first check valve 1118 closes. Supply paths for hydraulic oil discharged from the sub-pump 1103 are automatically switched in accordance with the discharge performance of the main pump 1102.
    Type: Grant
    Filed: May 13, 2009
    Date of Patent: February 3, 2015
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Yusuke Ogata, Koichi Tanaka, Nobuaki Takahashi, Kenji Matsuo, Naofumi Nishida
  • Publication number: 20150020516
    Abstract: There is provided a hydraulic circuit which can further improve a responsive characteristic in a pressure reducing operation and a reliability in the pressure reducing operation of a relief valve device, when a main circuit pressure exceeds a predetermined pressure.
    Type: Application
    Filed: April 3, 2012
    Publication date: January 22, 2015
    Applicant: BOSCH REXROTH CORPORATION
    Inventor: Nobuhisa Matsushima
  • Publication number: 20150013323
    Abstract: A circuit pressure control unit includes a relief valve and a variable throttle valve. The relief valve is connected to a connecting passage communicating with an actuator upstream. The variable throttle valve is disposed upstream of the relief valve and is configured to change an opening degree thereof according to a control signal from a controller.
    Type: Application
    Filed: January 21, 2013
    Publication date: January 15, 2015
    Applicant: KAYABA INDUSTRY CO., LTD.
    Inventors: Shunsuke Fukuda, Nobuyoshi Yoshida
  • Publication number: 20150013322
    Abstract: A fluid pressure control device includes a first control valve that switches to supply a working fluid to the pressure chamber of a cylinder on which a load pressure by the load acts so as to control the extension operation of the cylinder, a second control valve that switches to discharge the working fluid in the pressure chamber so as to control the contraction operation of the cylinder, an operate check valve that is interposed between the pressure chamber and the second control valve and that interrupts the discharge of the working fluid from the pressure chamber when the operate check valve is switched to a closed state and a pilot valve that performs, with a pilot pressure, a pilot operation on the second control valve and that switches, with the pilot pressure, the operate check valve to an opened state.
    Type: Application
    Filed: January 18, 2013
    Publication date: January 15, 2015
    Inventors: Tatsuo Ito, Mitsuhiro Maesaki
  • Publication number: 20150013324
    Abstract: An outlet port of a hydraulic pump/motor and a bottom chamber of a lift cylinder are connected to each other by a hydraulic fluid passage. A hydraulic fluid passage that is connected to a hydraulic fluid tank is formed to branch off the hydraulic fluid passage. A flow control valve controls the hydraulic fluid delivered from the lift cylinder when the fork is lowered, thereby regulating the flow rate of hydraulic fluid supplied to the hydraulic pump/motor and the flow rate of hydraulic fluid supplied to the hydraulic fluid tank. If regenerative operation can be performed, the flow control valve is closed and hydraulic fluid is delivered to the hydraulic pump/motor. If regenerative operation cannot be performed, the flow control valve is opened and hydraulic fluid is delivered to the hydraulic fluid tank. In either case, the fork can be lowered at an instructed speed.
    Type: Application
    Filed: January 16, 2013
    Publication date: January 15, 2015
    Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Tsutomu Matsuo, Hirohiko Ishikawa, Yuki Ueda, Tetsuya Goto, Junichi Morita
  • Publication number: 20140373520
    Abstract: A hydraulic system includes a pump (22) that draws fluid from a reservoir (24) and an actuator (26) having a first port and a second port. A metering valve arrangement (28) controls fluid flow through the actuator and includes a meter-in valve (30a, 30d) positioned between the pump and the first port and a meter-out valve (30b, 30c) positioned between the second port and the reservoir. A controller (34) controls operation of the metering valve arrangement. In a meter-in mode, the controller controls a fluid flow rate through the actuator by controlling an orifice size of the meter-in valve. In a meter-out mode, the controller controls a fluid flow rate through the actuator by controlling an orifice size of the meter-out valve. The controller determines the fluid flow rate through the actuator based on data derived from the meter-out valve in both the meter-in mode and the meter-out mode.
    Type: Application
    Filed: January 16, 2013
    Publication date: December 25, 2014
    Applicant: Eaton Corporation
    Inventor: Wade Leo Gehlhoff
  • Publication number: 20140366518
    Abstract: The present disclosure relates to a hydraulic system of a construction machine. The hydraulic system of the construction machine includes: an electronic proportional pressure reducing valve configured to control a flow rate, to which a maximum pressure is input as a control current value, and which is set to a minimum flow rate; a gear pump configured to provide pilot operation oil to the EPPRV; a shuttle valve configured to compare a pressure of first pilot operation oil passing through the EPPRV and a pressure of a flow rate control signal, and output second pilot operation oil having the greater pressure; a hydraulic pump of which a swash plate angle is controlled by the second pilot operation oil; and a pump control device configured to control a pressure of the EPPRV to be decreased from a maximum pressure by a predetermined inclination when the flow rate control signal is generated.
    Type: Application
    Filed: December 24, 2012
    Publication date: December 18, 2014
    Inventor: Jai Seok Bang
  • Publication number: 20140331662
    Abstract: A hydraulic control device for a forklift includes a hydraulic pump, a single electric motor for driving the hydraulic pump, an outflow control mechanism provided between a lift cylinder and the hydraulic pump, a flow control valve provided between the outflow control mechanism and a draining portion, and a controller. When a lowering operation of a fork and either forward or rearward mast tilting operations of a mast are performed at the same time, the controller controls the electric motor based on a target speed of the hydraulic pump. The flow control valve controls the flow rate of hydraulic fluid from the lift cylinder to the hydraulic pump and the flow rate from the lift cylinder to the draining portion in accordance with the difference between the actual rotation speed of the hydraulic pump and the target rotation speed of the hydraulic pump.
    Type: Application
    Filed: December 10, 2012
    Publication date: November 13, 2014
    Applicants: NISHINA INDUSTRIAL CO., LTD., KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Yuki Ueda, Tsutomu Matsuo, Hirohiko Ishikawa, Tetsuya Goto, Junichi Morita, Toshinari Fukatsu, Akira Nakajo, Ryo Yazawa
  • Patent number: 8880302
    Abstract: A lock valve is switched from lock condition to release condition when a lock member is switched from lock position to release position. When pilot pressure is at least a predetermined pressure when the elapsed time from the point at which the lock member is switched from lock position to release position is at least a first predetermined time, the lock valve is maintained in the release condition. When pilot pressure is at least the predetermined pressure, the continuous time duration is greater than the second predetermined time when the elapsed time is less than the first predetermined time, the lock valve is switched to the lock condition. When pilot pressure is at least the predetermined pressure, the continuous time duration is no more than the second predetermined time when the elapsed time is less than the first predetermined time, the lock valve is allowed to be switched.
    Type: Grant
    Filed: July 26, 2013
    Date of Patent: November 4, 2014
    Assignee: Komatsu Ltd.
    Inventors: Tatsuhiko Tachibana, Manabu Himoto, Daisuke Tsumura
  • Publication number: 20140318113
    Abstract: A cushioned swing circuit provides the reduction of oscillation common in the operation of heavy equipment such as with boom members. The circuit utilizes a transfer of high pressure fluid flow (caused by the inertial of the swing during rapid deceleration) from one leg of the circuit to the other leg of the circuit or to the sump which serves as decompression for the oil that would ordinarily be trapped in the leg. These phenomena create the swing cushioning effect.
    Type: Application
    Filed: March 15, 2012
    Publication date: October 30, 2014
    Inventors: Jarmo Harsia, Roger Lowman, Germano Franzoni
  • Patent number: 8869520
    Abstract: A load sensing system includes a first assembly of actuators for controlling a first hydraulic function, a pump adapted to supply the actuators with pressurized hydraulic fluid, an electrically controlled valve adapted to control the output pressure of the pump via a hydraulic signal, a first pressure sensor for detecting a load pressure of the first actuator assembly, and a control unit adapted to receive a signal with information about the load pressure detected by the first pressure sensor and to generate a control signal, corresponding to the detected load pressure, to the electrically controlled valve.
    Type: Grant
    Filed: November 21, 2007
    Date of Patent: October 28, 2014
    Assignee: Volvo Construction Equipment AB
    Inventors: Bo Vigholm, Andreas Ekvall
  • Publication number: 20140305117
    Abstract: The invention relates to a power cylinder comprising a piston-in-cylinder unit having at least one pressure connection, an integral valve arrangement for controlling the pressure volume flow from the pressure connection into the cylinder space and an integrated control and/or regulation unit for actuating the valve arrangement.
    Type: Application
    Filed: April 10, 2014
    Publication date: October 16, 2014
    Applicant: Liebherr-Hydraulikbagger GmbH
    Inventor: Roman Hofmann
  • Patent number: 8844280
    Abstract: A hydraulic control system is disclosed. The hydraulic control system may have a hydraulic actuator, a valve arrangement, and an operator input device configured to generate a first signal indicative of a desired hydraulic actuator velocity. The hydraulic control system may also have a sensor configured to generate a second signal indicative of an actual flow rate of fluid entering the hydraulic actuator, and a controller. The controller may be configured to determine a desired flow rate of fluid into the hydraulic actuator based on the first signal; to estimate the actual flow rate based on the desired flow rate, a correction flow rate, and a system response model; and to determine the actual flow rate based on the second signal. The controller may also be configured to make a comparison of the estimated and determined actual flow rates of fluid, and to determine the correction flow rate based on the comparison.
    Type: Grant
    Filed: February 28, 2011
    Date of Patent: September 30, 2014
    Assignee: Caterpillar Inc.
    Inventors: Grant S. Peterson, Randall T. Anderson
  • Publication number: 20140283509
    Abstract: In a lowering operation of a boom, the amount of operation of a control lever is detected by a pressure sensor and input to a controller. Based on the input operation amount, the controller obtains a target flow rate Q0 of return oil discharged from a boom cylinder, calculates a deviation ?Q between the target flow rate Q0 and an actual flow rate Q obtained from an actual rotation speed N of an electric motor acquired by a rotation speed sensor, calculates a signal Sm for controlling the opening area of a proportional solenoid valve in a manner allowing hydraulic fluid to flow to a control valve in just as much as ?Q, and controls an operation pilot pressure of the control valve supplied from a sub-pump in accordance with the signal Sm so that the hydraulic fluid will flow to the control valve exactly in the amount of ?Q.
    Type: Application
    Filed: December 18, 2012
    Publication date: September 25, 2014
    Inventor: Seiji Hijikata
  • Publication number: 20140260223
    Abstract: The present disclosure provides a hydraulic system of a transmission having a controller and a variable displacement pump. The pump includes an inlet and outlet and is adapted to be driven by a torque-generating mechanism. The system also includes a lube circuit fluidly coupled to the pump. A lube regulator valve is disposed in the lube circuit, such that the lube regulator valve is configured to move between at least a regulated position and an unregulated position. The regulated position corresponds to a regulated pressure in the lube circuit. A pressure switch is fluidly coupled to the lube regulator valve and configured to move between a first position and a second position, where the switch is disposed in electrical communication with the controller. A solenoid is disposed in electrical communication with the controller and is controllably coupled to the pump to alter the displacement of the pump.
    Type: Application
    Filed: March 14, 2013
    Publication date: September 18, 2014
    Inventors: Charles F. Long, Charles T. Taylor
  • Publication number: 20140260227
    Abstract: An adaptive, low-impact vehicle energy harvester system, and a method of harvesting vehicle energy, is provided. The system includes a plurality of channels disposed longitudinally in a trafficway, wherein each of the plurality of channels includes one or more compressible, elongated hollow bodies such that a movement of a vehicle along the trafficway causes contents in the elongated hollow bodies to be expelled from one end, a motor in communication with the hollow bodies such that the contents expelled from one end of the hollow bodies actuate the motor, and a control unit that varies a resistance to the movement of the contents in the elongated hollow bodies based on at least one of a mass of the vehicle, a velocity of the vehicle, and a rate of change of velocity of the vehicle.
    Type: Application
    Filed: January 17, 2014
    Publication date: September 18, 2014
    Inventor: Brian S. Hendrickson
  • Publication number: 20140260229
    Abstract: The present disclosure provides a hydraulic system of a transmission having a controller and a variable displacement pump. The pump includes an inlet and outlet and is adapted to be driven by a torque-generating mechanism. The system also includes a lube circuit fluidly coupled to the pump. A lube regulator valve is disposed in the lube circuit, such that the lube regulator valve is configured to move between at least a regulated position and an unregulated position. The regulated position corresponds to a regulated pressure in the lube circuit. A pressure switch is fluidly coupled to the lube regulator valve and configured to move between a first position and a second position, where the switch is disposed in electrical communication with the controller. A solenoid is disposed in electrical communication with the controller and is controllably coupled to the pump to alter the displacement of the pump.
    Type: Application
    Filed: March 4, 2014
    Publication date: September 18, 2014
    Inventors: Charles F. Long, Charles T. Taylor
  • Patent number: 8833068
    Abstract: A lock valve switching section switches a lock valve from a locked state to a released state when a lock member is switched from a locked position to a release position. An erroneous operation monitoring section maintains the lock valve in the released state when the pilot pressure is equal to or more than a predetermined pressure when elapsed time, which is from a point in time where the lock member is switched from the locked position to the release position, is equal to or more than the predetermined time. The erroneous operation monitoring section switches the lock valve to the locked state when the pilot pressure is equal to or more than the predetermined pressure when the elapsed time is less than the predetermined time.
    Type: Grant
    Filed: December 6, 2012
    Date of Patent: September 16, 2014
    Assignee: Komatsu Ltd.
    Inventors: Manabu Himoto, Daisuke Tsumura, Yoshimasa Ohbora, Jin Yogita
  • Patent number: 8833067
    Abstract: First and second mechanical hydraulic valves are disposed between a pump and the cap side chamber of an actuator and the pump and the rod chamber of the pump. The first and second valves are actuated as a result of respective pressure differentials applied across the valves. A controller controls flow from a pump in response to a commanded motion to control movement of the actuator, and cause the valves to open. The valves are disposed in their no-flow positions when the pump is not operative, and when the hydraulic system of off or locked out to hold a load.
    Type: Grant
    Filed: April 18, 2011
    Date of Patent: September 16, 2014
    Assignee: Caterpillar Inc.
    Inventors: Patrick Opdenbosch, Joshua Dierking
  • Publication number: 20140245732
    Abstract: The invention relates to a proportional directional control valve for controlling a hydraulic consumer, having a housing with a pressure port, a tank port, and first and second working ports. A control element is movably mounted in the housing. A single actuator is provided for moving the control element, which, in dependence on its position relative to the housing, enables different flow paths between the ports. The control element, starting from a first switching position in which both working ports are connected to the tank port, is movable by the actuator via a second switching position that follows the first switching position, to a third switching position that follows the second switching position. It is possible, by moving the control element from the first switching position into the third switching position, to successively disconnect the two working ports from the tank port and connect them to the pressure port.
    Type: Application
    Filed: February 24, 2014
    Publication date: September 4, 2014
    Applicant: FSP Fluid Systems Partners Holding AG
    Inventor: Wolfgang Bauer
  • Publication number: 20140245729
    Abstract: A hydraulic control device includes: a recovery oil passage; a regenerative motor that rotates an output shaft of an engine in response to a supply of the hydraulic fluid and is driven to rotate by rotation of the output shaft of the engine; a regenerative oil passage for guiding return oil from a boom cylinder to the regenerative motor without passing the return oil through the recovery oil passage; a coupling oil passage that couples the recovery oil passage and the regenerative oil passage to each other; and a regeneration-side check valve that is provided on the coupling oil passage, and allows the hydraulic fluid to flow from the recovery oil passage toward the regenerative motor, and moreover restricts the hydraulic fluid from flowing from the regenerative motor toward the recovery oil passage.
    Type: Application
    Filed: October 15, 2012
    Publication date: September 4, 2014
    Applicants: KABUSHIKI KAISHA KOBE SEIKO SHO (Kobe Steel, Ltd.), KOBELCO CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Takao Nanjo, Saburo Senoo, Naoki Goto
  • Patent number: 8806863
    Abstract: A hydraulic transmission unit comprises at least one pressure regulation valve (1) and a pilot control valve (2) which is connected to the pressure regulation valve (1) by a pilot control line (35). A pre-filling valve (3, 303) sets a pre-filling pressure (p—3) to avoid draining of a clutch (20) and the lines (231, 331) connected to the clutch (20) in an operating condition in which the clutch (20) is not actuated. To avoid draining when the clutch when in the operating condition, the pilot control line (35) is also connected to at least one line (236, 238, 336, 338) which is pressurized with a second pre-filling pressure (p—3).
    Type: Grant
    Filed: March 25, 2010
    Date of Patent: August 19, 2014
    Assignee: ZF Friedrichshafen AG
    Inventors: Georg Gierer, Thilo Schmidt, Christian Popp
  • Publication number: 20140216024
    Abstract: A brake valve is insertable into a working line of a hydrostatic travel drive. The brake valve has a main stage with a first port connected to a variable displacement pump of the drive system and a second port connected to a motor of the drive system. The main stage has a slide piston positionable in a valve bore. In a freewheeling position, a connection is maximally open with minimal throttling between the two ports. In pressure-reducing positions, a regulable, throttled connection is open from the second to the first port to brake the motor. In pressure-limiting positions, a regulable, throttled connection is open from the first to the second port to begin to throttle a pressure medium flow from the variable displacement pump to a pressure protection mechanism. The positions lie on a center line of the main stage along which the slide piston is movable.
    Type: Application
    Filed: February 3, 2014
    Publication date: August 7, 2014
    Applicant: Robert Bosch GmbH
    Inventor: Karl Krug-Kussius
  • Publication number: 20140196448
    Abstract: A hydraulic control apparatus is disclosed that controls a hydraulic pump in a construction machine in which a hydraulic actuator is connected to the hydraulic pump via a directional control valve of a closed center type, and in which a position of the directional control valve is changed according to an operation amount of an operation member. The hydraulic control apparatus includes a virtual negative control pressure calculating part configured to calculate, based on the operation amount of the operation member and a discharge pressure of the hydraulic pump, a virtual negative control pressure when a negative control system is assumed; and a part configured to calculate a control command value for the hydraulic pump based on the virtual negative control pressure.
    Type: Application
    Filed: March 18, 2014
    Publication date: July 17, 2014
    Applicant: SUMITOMO HEAVY INDUSTRIES, LTD.
    Inventor: Eisuke MATSUZAKI
  • Publication number: 20140190158
    Abstract: A composite valve is used in a hydraulic circuit. The composite valve is interposed between a stack valve and a hydraulic power supplier and between the stack valve and a multifunction valve coupled to a hydraulic device. The composite valve includes: stop valves opening/closing communication between the hydraulic power supplier and the stack valve and stop valves opening/closing communication between the stack valve and the multifunction valve; and bypass circuits respectively including stop valves opening/closing communication between the hydraulic power supplier and the multifunction valve, the bypass circuits provided closer to the hydraulic power supplier than the stop valves. This structure makes it possible to simultaneously perform various functions: repair, checking, and/or maintenance on the stack valve; flushing; and repair, checking, maintenance, and/or a trial run of the hydraulic device. The composite valve has uniform circuit configurations, which facilitates production of the valve.
    Type: Application
    Filed: March 29, 2013
    Publication date: July 10, 2014
    Applicant: U-TEC CO., LTD.
    Inventors: Yukio Uenishi, Yuji Kondo
  • Publication number: 20140174071
    Abstract: The present invention relates to a hydraulic control system for construction machinery capable of variably adjusting a set pressure of a relief valve, which controls a set pressure of a hydraulic system, according to a value inputted by means of pressure in the hydraulic system or the manipulation of a joystick.
    Type: Application
    Filed: August 9, 2011
    Publication date: June 26, 2014
    Applicant: VOLVO CONSTRUCTION EQUIPMENT AB
    Inventor: Chun-Han Lee
  • Publication number: 20140174751
    Abstract: There is provided a device and method for high speed hydraulic actuation. The method includes adjusting a position of an actuator using a hydraulic pressure regulator. Adjusting the position of the actuator includes increasing pressure on the hydraulic pressure regulator to open the actuator using a first solenoid, or decreasing pressure on the hydraulic pressure regulator to close the actuator using a second solenoid.
    Type: Application
    Filed: July 5, 2012
    Publication date: June 26, 2014
    Inventors: Mario R. Lugo, Ryan D. Fontenot, Syed M. Rashid Ali
  • Publication number: 20140174069
    Abstract: A hydraulic control system for a machine is disclosed. The hydraulic control system may have a tank, a pump, a swing motor having a first chamber and a second chamber, and at least one control valve configured to control fluid flow between the pump, the swing motor, and the tank. The hydraulic system may also have an accumulator configured to selectively receive pressurized fluid discharged from the swing motor and selectively supply pressurized fluid to the swing motor and a controller. The hydraulic control system may further include a first valve and a second valve coupled between the accumulator and the first and the second chambers of the swing motor. One of the first or second valve moves between a first position, a second position, and a third position for selective charging and discharging of the accumulator. The second valve also moves between multiple positions to realize selective charging and discharging of the accumulator.
    Type: Application
    Filed: December 21, 2012
    Publication date: June 26, 2014
    Applicant: Caterpillar Inc.
    Inventors: Jeffrey L. Kuehn, Jeremy T. Peterson, Gang Wen
  • Publication number: 20140165546
    Abstract: A system and method for controlling fluid flow through a hydraulic valve in a work machine is disclosed. The system and method may include receiving an input command by a controller configured to control a fluid flow to an actuator, the input command generated by an input controller. The system and method may also include receiving a parameter indicative of pump flow by the controller, determining a first valve command corresponding to the input command and determining a second valve command based upon the parameter that achieves the fluid flow to the actuator corresponding to the first valve command.
    Type: Application
    Filed: December 18, 2012
    Publication date: June 19, 2014
    Applicant: Caterpillar Inc.
    Inventors: Rustin Metzger, Joshua Callaway, Justin Speichinger
  • Patent number: 8752371
    Abstract: An independent metering valve (IMV) assembly is disclosed that includes a metering stem including an inlet. The IMV assembly also includes a hydro-mechanical control valve in communication with a fluid source and the inlet. The control valve also including a spool with a closed end and an open end. The control valve includes a biasing member that biases the control valve or spool towards an open position thereby establishing communication between the fluid source and the inlet. The control valve also including a load signal line providing communication between an outlet of the control valve upstream of the inlet and the closed end of the spool. Wherein high pressure in the load signal line allowing the control valve to move towards a closed position thereby overcoming bias of the biasing member and reducing flow to the inlet during a high pressure condition.
    Type: Grant
    Filed: December 17, 2010
    Date of Patent: June 17, 2014
    Assignee: Caterpillar Inc.
    Inventors: John Ferraz, Aleksandar M. Egelja, Pengfei Ma, Matthew J. Beschorner
  • Publication number: 20140157774
    Abstract: Embodiments for a turbine-generator position in a compressor bypass flow path are presented. In one example, a method for an engine having a compressor comprises generating energy via a turbine-generator positioned in a bypass flow path of the compressor. In this way, the energy of the recirculated intake air may be recovered by the turbine-generator.
    Type: Application
    Filed: December 6, 2012
    Publication date: June 12, 2014
    Applicant: FORD GLOBAL TECHNOLOGIES, LLC
    Inventors: Gregory Patrick McConville, Karen Elizabeth Maceroni
  • Publication number: 20140150416
    Abstract: Disclosed is an actuator damping control system for reducing shocks imparted to a hydraulic actuator caused by a change in load resulting from an abrupt manipulation of a boom or other working device.
    Type: Application
    Filed: July 12, 2011
    Publication date: June 5, 2014
    Applicant: VOLVO CONSTRUCTION EQUIPMENT AB
    Inventor: Chun-Han Lee