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JPH1182405A |
To keep a minimum arithmetic error even when the valve opening is increased while increasing the arithmetic speed by executing tan and tan-1 by use of an arithmetic table in which the relation of a regulated tan to a regulated table is p...
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JPH1182417A |
To miniaturize an assembly and increase the capacity thereof by fitting a rotating part constituting a rotation detecting means to the output shaft of a fluid motor, arranging a rotation detecting part on the circumference of a rotating ...
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JPH1151003A |
To provide a capacity control system for a variable capacity motor to perform a slow motion without varying a command to a minimum pressure (a low speed) even when a command for a maximum pressure (a high speed) is outputted to a solenoi...
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JP2848900B2 |
PURPOSE:To improve the responseness and operability of an actuator and suppress the generation of cavitation under various conditions by controlling a flow control valve in response to the opening area of the center bypass passage of a d...
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JPH1113087A |
To improve the abrasion of a machine and riding comfortableness by allowing a position sensor to detect the position of a joystick and generate an operator command signal, and allowing a microprocessor to receive the boom angle, bucket a...
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JP2844926B2 |
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JP2844476B2 |
There is disclosed a method of controlling a hydraulic actuator (1) by using a normally closed solenoid valve (4) and two normally open solenoid valves (5, 6) and selectively actuating them to place the piston (10) of a hydraulic cylinde...
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JP2841893B2 |
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JPH10339301A |
To improve responsiveness of a pneumatic equipment having waste time. In an opened condition of a switch 208, when a reference signal Sr of staircase shape is supplied, an offset signal Sd compensating waste time of a pneumatic equipment...
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JP2833954B2 |
PURPOSE: To improve durability in a head part having a spline by arranging a pair of projecting pieces to sandwich projections of a spool between them, and installing a pin in a position opposed to a sleeve pin fitting recessed groove of...
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JPH10325401A |
To provide a bilateral position and force transmission device to be excellent in complementary ability between operation of a cylinder on the master side and operation of a cylinder on the slave side and reduce size, and to provide a reh...
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JPH10306801A |
To reduce overshoot of control variables in a pneumatic apparatus having a dead time. When reference signals Sr change step by step, since a switch 208 is open, a pneumatic apparatus 15 having a dead time is started to drive by PD contro...
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JP2584122Y2 |
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JP2811690B2 |
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JPH10274101A |
To provide a control device for a pressure-response operation type actuator to improve durability of a position sensor. A control device for a pressure-response operation type actuator 5 is provided with a pressure chamber 5a to which a ...
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JP2582436Y2 |
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JP2808868B2 |
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JPH10262414A |
To provide a tractor with which structure is simplified, the number of parts is reduced and operability is improved by changing the operating speed of external hydraulic equipment corresponding to the manipulated variable of lever from a...
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JPH10262413A |
To provide a tractor with which structure is simplified and operability is improved by setting a prescribed control mode with external hydraulic equipment control for controlling external hydraulic equipment corresponding to the operatio...
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JP2795601B2 |
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JP2795602B2 |
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JPH10222229A |
To provide an inexpensive controller by providing a low speed A/D converter controlling a displacement sensor and a low speed processor. Energizing current is inputted to the displacement sensor 21 from the origination means 13 of the co...
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JPH10205643A |
To regulate the flow rate of a fluid, and form a control valve mechanism having a high reliability at low cost by switch-controlling a 4 port-3 position solenoid switching valve so as to match a setting signal outputted by valve opening ...
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JPH10184556A |
To control pump discharge in the same way as before the generation of a failure even in case of the failure being generated to an electric system in a hydraulic pump displacement control device performing electromagnetic proportional con...
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JP2771953B2 |
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JP2772159B2 |
An integrated process control valve includes a fluid valve body having an inlet for receiving fluid, an outlet for discharging fluid, a fluid flow passage connecting the inlet and outlet, and a controllable throttling element which is mo...
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JP2770132B2 |
PURPOSE: To eliminate trouble such that a resin is injected at high speed in an unprepared state even when power failure is generated. CONSTITUTION: In an injection molding machine equipped with a hydraulic cylinder having a double-rod t...
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JPH10169603A |
To automatically correct discrepancy of a return position generated in a control valve mechanism by an ambient temperature and an error of manufacture. In a hydraulic cylinder 3, pressure oil from a hydraulic pressure source 1 is supplie...
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JPH10169602A |
To provide a liquid pressure driving gear whereby feedback control can be operated even in the case of driving a a liquid pressure cylinder by pressure liquid from a liquid pressure pump driven by an electric motor. A liquid pressure pum...
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JP2767436B2 |
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JP2762356B2 |
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JP2758493B2 |
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JPH10141305A |
To drive a spool of a servo valve continuously by branching off a desired value into two parts, adding a bias signal to each signal whose one side is inverted, and controlling a volt-ampere converter for an electromagnet after getting th...
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JP2756096B2 |
PURPOSE: To provide a rotary actuator which has superior transmission efficiency of torque, has a compact size and long life, and easily detect the rotation angle. CONSTITUTION: A rotary actuator is provided with a piston 17 having a fem...
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JPH10131916A |
To attain miniaturization and high efficiency and hold an initial position at the time of non-operation by rotating a partition valve by oil pressure fed to an oil pressure chamber, taking its motion off to an output shaft, and providing...
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JPH10131903A |
To avoid worsening of control stability, disturbance restrainability, and the like by composing a transfer function of one path in a control system of an approximate model lowered in dimension and coinciding with a transfer function of t...
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JPH10131910A |
To make a forward/reverse turn angle by a cylinder device 180 degrees or more in a turn unit. Between a turning body 1 and a fixed part 3, a pair of cylinder devices 10, 15 connected to the turning body 1 by a common connecting shaft 8 a...
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JPH10131909A |
To make a forward/reverse turning angle by a cylinder device 180° or more in a turning unit. Between a turning body 1 and a fixed part 3, a main cylinder device 10 is arranged and between the fixed part 3 and the main cylinder device 10...
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JPH10110702A |
To provide size reduction by fitting a hydraulic control valve to the casing of an actuator in the roughly radial direction and forming a valve mecha nism and a hydraulic passage inside the casing. A hydraulic control valve 23 fitted on ...
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JPH10504371A |
PCT No. PCT/EP95/03192 Sec. 371 Date Aug. 8, 1997 Sec. 102(e) Date Aug. 8, 1997 PCT Filed Aug. 11, 1995 PCT Pub. No. WO96/05543 PCT Pub. Date Feb. 22, 1996The present invention relates to a control system for hydraulic power units, in pa...
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JPH10110846A |
To attain a minute flow amount adjusting device by connecting a vessel to high and low pressure side pipe passages alternatively and intermittently by means of a valve which is intermittently opened and closed, and flowing fluid of a mea...
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JPH10103301A |
To provide a throttle actuator to increase an operation speed, be excellent in durability, and reduce a cost. A hydraulic motor type throttle actuator 20 comprises mainly a hydraulic motor part 20b, a rotor 20c, and a solenoid 20d. The h...
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JPH1097301A |
To monitor the dead zone of a controlled system on-line and set a compensator which compensates the dead zone on-line by estimating an inverse function by using an estimated dead zone and fuzzy inference, and performing carry-up by using...
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JPH1091210A |
To provide a robust and stable servo control system even when a servo valve which adjusts working oil supplied from a hydraulic pressure source to an actuator has a modeling error. This servocontrol system adjust the working oil supplied...
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JPH1089308A |
To provide a varible priority device recognizing pilot pressure by set pressure by which a high pressure side control valve for supplying hydraulic operating fluid to a work device for which high load is requested can be made to operate ...
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JPH1088626A |
To provide an operation driving device capable of conducting operation avoiding an obstruction in an upper section and also capable of performing operation as a normal two-piece boom type working machine. A second boom-signal converter 1...
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JP2730833B2 |
PURPOSE: To finely position a body which is, specially, heavy and large in inertia with high precision. CONSTITUTION: The positioning control method and device integrate the deviation between the detection signal 10a from the sensor 10 o...
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JPH1078163A |
To promote responsiveness of a valve control system by detecting the present position of a spool, generating an internal feedback signal, comparing a correction signal with the internal feedback signal, and generating a spool positioning...
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JPH1078004A |
To eliminate the friction or wear of a moving part which is a possible cause for the deterioration of an electropneumatic positioner for longer service life by feedingback the position signal of a valve stem with no-contact. A deviation ...
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JPH10502998A |
PCT No. PCT/EP95/02467 Sec. 371 Date Jan. 21, 1997 Sec. 102(e) Date Jan. 21, 1997 PCT Filed Jun. 24, 1995 PCT Pub. No. WO96/03586 PCT Pub. Date Feb. 8, 1996A positioning drive having a hydraulic motor with a cam disc which is rotatable w...
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