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7610754 |
Fluid pressure unit and fluid pressure unit control method
In a hydraulic unit (A) including a hydraulic pump configured to be driven by a motor ( 2 ) and a hydraulic cylinder ( 3 ) for actuating a chuck, a fixed displacement hydraulic pump is combined...
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7607296 |
Device and method of controlling hydraulic drive of construction machinery
In construction machinery, control is conducted to keep a work machine to operate at a constant speed regardless of the operation thereof. Different engine output lines T 0 -T 3 and pump torque...
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7596945 |
Load control device for engine of work vehicle
A load control device for an engine of a work vehicle that purposes to render the work vehicle, such as a wheel loader or the like, capable of raising a vehicle speed in a short period of time by...
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7584611 |
Control system for hydraulic construction machine
When a mode selection command selects an economy mode, a mode selector 700 e is turned on and outputs an engine revolution speed modification value ΔN 0 (ΔN 1 =ΔN 0 ) computed by an...
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7543448 |
Control system for hydraulic construction machine
A computing section computes a reference revolution-speed decrease modification amount DNLR; and multiplies an engine revolution speed modification gain KNL by a reference revolution-speed decrease...
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7543447 |
Control system for traveling working vehicle
A traveling working vehicle maintains fuel economy while ensuring a sufficient work rate in heavy-load work. A torque control regulator 26 controls the absorption torque of a hydraulic pump 22 ...
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7500535 |
Control device for construction machine
A control device for a construction machine according to the present invention is configured so that in the construction machine provided with an automatic stop function which automatically stops...
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7484814 |
Hydraulic system with engine anti-stall control
A hydraulic system has first and second functions in which separate control valves govern the flow of fluid between actuators and both a supply conduit and a return conduit. The second function is...
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7481053 |
Hydraulic pressurizer system
A hydraulic pressurizer system comprises a drive source, which drives a hybrid vehicle, a mechanical oil pump, which is driven by the drive source, an electrical motor, which is activated by a 12V...
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7469535 |
Hydraulic driving control device and hydraulic shovel with the control device
A hydraulic operation controlling unit where the engine can be driven stably at a target output torque point and reduction in the work speed can be prevented at the time of light load, includes an...
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7464493 |
Work machine
A work machine is provided having a starter motor for starting a prime mover, which without provision of any special hydraulic equipment, allows for draining pressure oil that still remains in a...
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7454905 |
Clutch mechanism of hydrostatic continuously variable transmission
A clutch mechanism for a hydrostatic continuously variable transmission has a hydraulic circuit including a high pressure oil path for feeding working oil from a hydraulic pump to a hydraulic motor...
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7441407 |
Hydraulic drive control device
A hydraulic drive control device which is capable of translating the effect of oil pressure loss reduction into the effect of fuel consumption reduction that is very real to the user. The hydraulic...
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7398648 |
Travel control device for hydraulically driven vehicle and hydraulically driven vehicle
The present invention includes a hydraulic pump 10 driven by a prime mover 1 , a traveling motor 12 driven with pressure oil delivered from the hydraulic pump 10 , a control valve 11 for...
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7389641 |
System for and method of operating a pressurized air source of a vehicular agricultural applicator
A system configured to drive a fan of an agricultural applicator is provided. The fan is mounted on a wheeled chassis assembly propelled via a drive train by an engine in a forward direction of...
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7353649 |
Hydraulic pressure supply control in industrial vehicle
A priority flow rate control valve ( 30 ) distributes pressurized working oil discharged from a hydraulic pump ( 10 ) driven by an electric motor ( 11 ) to a power steering device ( 20 ) first, and...
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7320217 |
Load controller for hydrostatic transmission in work vehicles
Disclosed is a load controller for use in a hydrostatic transmission for a work vehicle. Power supplied from an engine is branched to drive an implement system and a traveling system. The...
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7316113 |
Control device for a work machine hydraulic pump used in a work vehicle
A control device for a work machine hydraulic pump used on a work vehicle according to the present invention has an object to rapidly accelerate the engine to start the vehicle quickly and to...
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7269945 |
Method for compensating flow rate at neutral position of operation lever of construction equipment
A method for compensating a flow rate at a neutral position of an operation lever of construction equipment is adapted so that when RPM of an engine becomes different, an actuator can be...
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7240487 |
Throttle potentiometer adapter
A throttle potentiometer adapter provides a direct connection between a pivot nut on a hand throttle linkage and the internal sleeve of a potentiometer. The potentiometer provides a voltage output...
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7225615 |
Method and a device for controlling a vehicle and a computer program for performing the method
In method and a device for controlling a vehicle, the vehicle includes an engine arranged to drive at least one pair of half shafts and to drive at least one pump. The pump is arranged to supply a...
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7195209 |
Aircraft high-lift system with overload protection
The invention concerns an aircraft high-lift system with a drive system, components for transmitting the drive energy over the entire wing span to drive stations of individual segments of landing...
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7165397 |
Anti-stall pilot pressure control system for open center systems
A hydraulic control system has a pilot pressure supply circuit that applies a pressure differential dependent on engine speed to opposite sides of an anti-stall valve to turn off the pilot flow...
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7143859 |
Construction machinery
Construction machinery which is capable of improving fuel efficiency of the engine and also capable of effectively utilizing surplus energy in a light-load mode. The construction machinery includes...
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7114332 |
Clutch apparatus for a hydrostatic continuously variable transmission and transmission incorporating same
A hydrostatic continuously variable transmission includes a hydraulic pump and a hydraulic motor, supported by a common support shaft, and hydraulically connectable to each other through a...
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7080508 |
Torque controlled pump protection with mechanical loss compensation
A method and apparatus are provided for controlling the operation of a pump, such as a centrifugal pump, featuring steps of either adjusting the operation of the pump, or issues a warning to a user...
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7032379 |
Oil supply unit for a running power transmission
There is provided an oil supply unit for a running power transmission of a vehicle. The oil supply unit includes a housing, a hydraulic pump of a variable displacement type, a detecting mechanism...
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7020553 |
Signal processing system for construction machine
A machine body controller 70 A includes a modification control unit 70 Ab for computing a torque modification value based on detected signals from environment sensors 75 to 83, and modifies a...
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7007466 |
System and method for controlling hydraulic flow
A method is provided for controlling hydraulic flow to a hydraulic actuator in fluid communication with a pump. The method includes generating a signal representative of a speed of the pump and...
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6986368 |
Hydraulic control system for tree cutting saw
A hydraulic circuit for a tree-cutting machine having a feed mechanism powered by hydraulic fluid at the output of a hydraulic motor. The hydraulic motor may comprise a variable-displacement motor....
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6945040 |
Ram moving method for hydraulic machine, ram movement controller, method for preventing trapping of axial plunger pump used for the machine, and the pump
If an instruction to move a ram ( 5 U) is issued, a ram instructed speed is instructed to be suppressed to a certain warming-up speed not higher than a target speed until a release speed...
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6938719 |
Speed control system for wheeled hydraulic traveling vehicle
Control valves are respectively provided in a pair of variable displacement hydraulic pumps. If an ultra low speed travel signal is issued in response to an ultra-low-speed switch turned on, one of...
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6851207 |
Construction machinery
First and second hydraulic pumps each adapted to operate plural actuators are activated by separate electric motors respectively. In accordance with signals provided from a controller on the basis...
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6820356 |
Hybrid powered construction equipment
Hybrid powered construction equipment is capable of making effective use of the output energy of an engine; increasing operating speed while keeping noise level low, and assuring operation power...
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6751953 |
Hydraulic actuating device for a closure assembly
A hydraulic actuating device for a closure assembly, for example of a vehicle, which closure assembly comprises a closure element which can be moved between a closed position, in which the closure...
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6748739 |
Hydraulic power system
A hydraulic power system includes a reversible pump, a variable-speed servomotor for driving the pump, a pressure sensor for detecting load pressure, a detector for detecting the motor speed,...
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6564548 |
Speed control apparatus of working vehicle and speed control method thereof
A speed control apparatus and method of a working vehicle which can reduce a working speed and a traveling speed of the vehicle to a desired speed range in correspondence to a change of working...
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6546724 |
Work machine including finely adjustable operation modes
Various work machines in which safety of operation and operation efficiency can be enhanced in accordance with variation in the kind of operation and operation condition when operation is carried...
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6431231 |
Hydraulically controlled stump grinder
The stump grinder has a rotating cutting wheel that is mounted onto an arm for raising and lowering movement and is driven by a hydraulic motor. The arm is capable of being moved about a generally...
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6370875 |
Air powered hydraulic jack with load sensing auto shut-off air control
The invention provides an improved fluid motor powered lift system having a valve arrangement for reducing or interrupting the fluid flow supplied to the motor when the pressure in the lift system...
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6369339 |
Apparatus for manipulating a load
The invention relates to an apparatus for manipulating in the height and in particular setting down of a load. The apparatus comprises a suspension on a lifting device, which suspension comprises a...
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6357232 |
Differential pedal interface system for a cycling type work machine
A differential pedal interface system for controlling the forward and reverse speed, acceleration, deceleration, and jerk of a work machine including foot pedals coupled to each other for...
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6347516 |
Electrohydraulic pressure supply unit with variable-displacement pump and controllable electric device
An electrohydraulic pressure supply unit involving the joint operation of two energy converters, which can be adjusted independent of each other, including an electric motor with speed control that...
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6314727 |
Method and apparatus for controlling an electro-hydraulic fluid system
The present invention provides a method and apparatus for controlling a electro-hydraulic system of an earthmoving machine. The electro-hydraulic system may include a pump providing fluid to at...
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6305419 |
Variable pilot pressure control for pilot valves
A hydraulically operated industrial machine has hydraulic work components such as a boom, bucket or the like, and also uses hydraulic motors for propelling the machine. The motors and cylinders are...
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6305162 |
Method and apparatus for controlling the deadband of a fluid system
The present invention provides a method and apparatus for controlling a fluid system. The fluid system includes a hydraulic circuit having a pump driven by an engine. The pump delivers fluid to an...
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6273492 |
Operating mechanism for a folding top of a convertible
An operating mechanism for a folding top (1) of a convertible has an electric motor (10) with a rotational speed that can be regulated for driving a hydraulic gear mechanism (11). A control unit...
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6260356 |
Control method and apparatus for an electro-hydraulic power assisted steering system
A power assisted steering system 12 has a control valve 28, a pump 22 coupled to the control valve 28, and a motor 20 coupled to the pump. A controller 18 is coupled to the motor. The controller...
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6223530 |
Control device for hydraulic power cylinders
The invention relates to a control device for hydraulic power cylinders, in particular power cylinders of a road truck tailgate, comprising a hydraulic pump (1) driven by a motor (M). Said pump can...
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6220028 |
Hydraulic drive system for hydraulic work vehicle
A hydraulic drive system is provided with a signal guide system for guiding a delivery pressure of a pump as a command pressure via a line and a port, another signal guide system for guiding a...
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