摘要:
The present invention refers to a system and method for checking the operational status of alternative compressor valve and more particularly for checking operational status of electrically commanded valves, provided in alternative compressors used in refrigeration systems. In accordance with the present invention, said operational checking system of alternative compressor valve comprises a data processing core (5) capable of estimating one among two possible operations statuses of said metal valve (1) by varying at least one electric parameter provided by said sensor (4), wherein said step of estimating one among two possible operational statuses of said metal valve (1) is effected on the basis of the results from the comparison between said signal of electric parameter from sensor (4) and the predetermined range of data analogous to the electric parameter.
摘要:
Die Erfindung betrifft ein Gasdosierventil (1) für einen Zweistoffmotor (17), das einen verlagerbaren Sperrkörper (6) aufweist, der in einer an einen Ventilsitz (5) angelagerten Position das Gasdosierventil (1) schließt und in einer von dem Ventilsitz (5) abgehobenen Position das Gasdosierventil (1) öffnet. Das Gasdosierventil (1) ist in einem Gasbetriebsmodus, bei dem das Gasdosierventil (1) Brenngas über einen Gaskanal (13) in ein Saugrohr (15) des Zweistoffmotors (17) dosiert, und in einem Flüssigbrennstoffbetriebsmodus, in dem das Gasdosierventil (1) gegen den im Saugrohr (15) vorherrschenden Druck dichtend geschlossen bleibt, betätigbar. Der der Ventilsitz (5) ist entlang einer Ventilsitzführung (4) verschiebbar angeordnet, wobei der Ventilsitz (5) im Gasbetriebsmodus aufgrund des Brenngasdrucks im Gaskanal (13) vom Sperrkörper (6) weg gegen einen Anschlag (20) im Gasdosierventil (1) gedrückt und in seiner betriebsmäßigen Position gehalten wird, und wobei der Ventilsitz (5) im Flüssigbrennstoffbetriebsmodus vom Druck im Saugrohr (15) dichtend gegen den Sperrkörper (6) gedrückt wird.
摘要:
Valve devices for a hydraulic circuit, having an actuator unit (10) with an electromagnetic circuit (14), which electromagnetic circuit is composed of an armature (22) movable in translational fashion, of a core (20), of an energizable coil (18) arranged on a coil carrier (16), and of flux-guiding devices (24, 26, 28, 30), and having a valve unit (12) with a valve housing (38) in which a regulating slide (84) is mounted in axially movable fashion and in which an outlet port (94), an inlet port (98) and a control pressure port (96) arranged between inlet port (98) and outlet port (94) are formed, are known. Said valve devices normally regulate only the oil pressure at the pump outlet. It is therefore proposed that the valve housing (38) have an additional transverse bore which serves as a control pressure port (100). The latter serves for the feedback of the pressure at the internal combustion engine (118), such that regulation of the actually relevant engine oil pressure is achieved.
摘要:
{Technical Problem} Provided is a solenoid valve that prevents noise occurring due to repeated collisions of a valve seat and a valve body occurring at times that the aperture of a passage is small, and that affords a stable aperture of the passage. {Solution to Problem} The solenoid valve varies the aperture of a passage between a valve seat and a valve body by a PWM-controlled solenoid, varying the volume or pressure of a working fluid, and is characterized in that a friction member for contacting the outside periphery of a reciprocating member directly driven through driving by the solenoid is furnished to a stationary-side member in an area surrounding the reciprocating member.
摘要:
{Technical Problem} Provided is a solenoid valve that prevents noise occurring due to repeated collisions of a valve seat and a valve body occurring at times that the aperture of a passage is small, and that affords a stable aperture of the passage. {Solution to Problem} The solenoid valve varies the aperture of a passage between a valve seat and a valve body by a PWM-controlled solenoid, varying the volume or pressure of a working fluid, and is characterized in that a friction member for contacting the outside periphery of a reciprocating member directly driven through driving by the solenoid is furnished to a stationary-side member in an area surrounding the reciprocating member.
摘要:
A fluid working machine comprising a controller and a working chamber, an electronically controllable low pressure valve associated therewith and a fast high pressure valve associated therewith, characterized in that the working chamber has associated therewith a slow high pressure valve for controlling the connection of the working chamber to a secondary high pressure manifold. A fluid working machine according to the invention may be operated to rotate its shaft to a certain position, for example to allow easy maintenance of a wind turbine generator.
摘要:
In a method of detecting a fault in a fluid-working machine including a plurality of working chambers of cyclically varying volume, each working chamber is operable to displace a volume of working fluid which is selectable for each cycle of working chamber volume to carry out a working function responsive to a received demand signal. An output parameter of the fluid working machine, which is responsive to the displacement of working fluid by one or more of the working chambers to carry out the working function, is measured. It is determined whether the measured output parameter fulfils at least one acceptable function criterion, taking into account the previously selected net displacement of working fluid by a working chamber during a cycle of working chamber volume to carry out the working function.