Abstract:
A hydraulic motor unit including a hydraulic motor (1′) which is connected to two working lines (3,4). The swiveling angle (α) of the hydraulic motor (1′) is adjustable by an adjusting unit (7) which is provided with a regulating piston (8) having two piston surfaces (9, 10). The regulation pressure acting on a first piston surface (10) in a regulation pressure chamber (12) can be adjusted by a control valve (13). The control valve (13) adjusting the regulation pressure is movable between two final positions. The pressure of a working line (3, 4) is applied to a first measuring surface (23) of the control valve (13) adjusting the regulation pressure while a second, opposite measuring surface (25) of the control valve (13) is impinged upon by a control pressure piston (34) at a force that depends on the control pressure only once a threshold value of a pipe (28, 18′) supplying control pressure has been exceeded.
Abstract:
Disclosed is a braking system of an automobile, which can produce and store an electric power by means of the energy generated when the automobile is braked, thereby increasing efficiency in energy use, and simultaneously which can perform an anti-lock braking function and a traction control function. In the braking system, a master cylinder generates a hydraulic pressure when the brake pedal is pressed. A variably exhausting pump unit performs a pumping operation by the hydraulic pressure from the master cylinder. A control section senses a traveling state of the automobile and controls so that a proper braking force is applied to a wheel of the automobile. A flow control valve providing the variably exhausting pump unit with the braking force. A generating section generates electricity by means of a bypassed hydraulic pressure according to the order of the control section.
Abstract:
A multi-piston pump is provided which uses microprocessor controlled checkall valves to control flow rate of a fluid at the pump's outlet port. The pump includes nine cylindrical shaped chambers and associated reciprocating pistons which are driven by a cam attached to a shaft. The pump's shaft is coupled to the shaft of a motor which, in turn, drives the pump's shaft and cam resulting in a fluid, such as seawater, filling each of the nine chambers and then having the fluid forced from the chamber by the movement of its associated piston from bottom dead center to top dead center. A pressure transducer which monitors the pressure at the pump's outlet port and a shaft encoder which monitors the angular position of the pump's shaft respectively provide analog signals indicative of the pump's outlet port's pressure and the shaft's angular position. A microprocessor receives these analog signals in a digital form, processes the signals and provides digital pulse signals to either extend or retract the rod of nine solenoids depending upon the pressure at the pump's outlet port. Each of the nine solenoid rods when extended engage a check ball valve within one of the pumps nine inlet passageways allowing the passageway to remain open when the associated reciprocating piston is in a pumping stroke. This allows seawater to be discharged through the inlet passageway maintaining fluid flow at the outlet port at a pressure level which is commensurate with the intended use of the pump.
Abstract:
A wobble plate compressor which is adapted to vary the angularity of the wobble plate during rotation in response to the difference between the resultant reaction force exerted by the pistons on their compression and suction strokes and the pressure in the crankcase. The wobble plate is supported by a first fulcrum movable along the drive shaft around which it is disposed, at a diametrically central location, and by a second fulcrum at a location radially spaced from the drive shaft. The second fulcrum is formed by an end of an arm member disposed for rotation together with the drive shaft. The above end of the arm member is in camming engagement with a side surface of the wobble plate so that with an increase in the angularity of the wobble plate the second fulcrum moves toward the axis of the drive shaft through a substantial stroke, whereby the angularity of the wobble plate can vary at a reduced rate relative to a change in the pressure in the crankcase, thereby enhancing the stability of capacity control.
Abstract:
An axial piston machine in a swash-plate construction with an actuating device. The actuating device comprises a actuating piston and a mating piston. The actuating piston and the mating piston are connected to the swash plate each with the first end thereof and can be applied with the second end thereof with a force acting in the direction of the first end. For resetting the swash plate in the direction of a resting position, an elastic element is provided on the actuating piston and on the mating piston, which is supported on a spring bearing arranged on the first side facing the swash plate of the actuating piston or of the mating piston. In the other direction, the elastic element is supported on a second spring bearing arranged on the end facing away from the swash plate of the actuating piston or of the mating piston. When the swash plate is deflected from the resting position, the second spring bearing of the actuating piston or of the mating piston is supported on a counter bearing on the housing side. The second spring bearing of the respective other actuating bearing or mating bearing is supported on a counter bearing on the piston side.
Abstract:
A stroke-adjustable air conditioning compressor, in particular for motor vehicles, including a drive mechanism for pistons that move back and forth, the pistons being driven by an adjusting plate, such as a pivoting plate, pivoting ring or swash plate at an adjustable pivoting angle. The position of the pivoting angle is influenced inter alia by compressive forces, inertial forces and elastic forces that are active in the drive mechanism.
Abstract:
A fuel injection control unit, including an electronic governor and a controller for an engine performs control in a governor region based on an isochronous characteristic. A working machine controller receives a delivery pressure signal P and controls a regulator such that, when the delivery pressure of a hydraulic pump exceeds a predetermined pressure P1, the displacement of the hydraulic pump does not exceed a value decided in accordance with a preset pump absorption torque curve. The working machine controller controls the regulator such that, when the delivery pressure of the hydraulic pump 2 is not higher than the predetermined pressure P1, the displacement of the hydraulic pump is increased as the delivery pressure of the hydraulic pump lowers from the predetermined pressure P1.
Abstract translation:包括电子调速器和发动机的燃料喷射控制单元基于等时特性在调速器区域中进行控制。 工作机械控制器接收输送压力信号P并控制调节器,使得当液压泵的输送压力超过预定压力P 1时,液压泵的排量不超过根据预设泵确定的值 吸收扭矩曲线。 工作机械控制器控制调节器,使得当液压泵2的输送压力不高于预定压力P 1时,随着液压泵的输送压力从预定压力降低,液压泵的排量增加 P 1。
Abstract:
An fuel injection control unit (an electronic governor 12 and a controller 13) for an engine 1 is capable of performing control in a governor region based on an isochronous characteristic. A working machine controller 18 receives a delivery pressure signal P and controls a regulator 16 such that, when the delivery pressure of a hydraulic pump exceeds a predetermined pressure P1, the displacement of the hydraulic pump does not exceed a value decided in accordance with a preset pump absorption torque curve 20. Also, the working machine controller 18 controls the regulator 16 such that, when the delivery pressure of the hydraulic pump 2 is not higher than the predetermined pressure P1, the displacement of the hydraulic pump is increased as the delivery pressure of the hydraulic pump lowers from the predetermined pressure P1. As a result, even when the governor region is controlled based on the isochronous characteristic, the delivery flow rate of the hydraulic pump is increased as an engine load reduces.
Abstract:
A pump or compressor wherein the volumetric displacement of a piston cylinder assembly is variable. The piston is connected to a crank slider or eccentric mechanical drive, the crankshaft of which oscillates alternately clockwise through a controllably variable angle .theta. and counterclockwise through substantially the same angle .theta., the angle .theta. being measured from the angular position of the crankshaft or eccentric at which separation between piston and the closed end of the bore is a minimum (Top Dead Center). The angle of crank oscillation controls the degree of volumetric displacement of the piston. The crank shaft is connected to a torsional spring so as to substantially resonate the rotational inertia of the moving parts. An oscillating electric motor supplies the oscillating torque to drive the mechanism at constant frequency but controllably variable angular amplitude.
Abstract:
A hydraulic drive unit of a press machine and a swash plate type variable capacity axial piston pump to use a hydraulic drive unit. Discharge of the pump and the direction of the hydraulic pressure can be controlled at high speed, and the direction of the hydraulic pressure and the timing of the discharge can coincide. The selector device 12 includes spool valves in parallel is used in place of a servo valve. An electric motor 30 for driving the pump and cam of the axial piston pump 11 and an electric motor 47 for driving the selector cam of the selector device 12 are controlled cooperatively by commands from the numerical control device 14. Two spools 44a, 44b of the selector device 12 performs changeover actuation alternately. Synchronous control of the discharge of the axial piston pump 11 and the flowing direction change of working fluid to the hydraulic pressure cylinder 1 are done, so that the piston 1a of the hydraulic pressure cylinder 1 is made to move up and down.