A capacity control valve includes: a valve body (10) including first communication passages (11), second communication passages (12), third communication passages (13), and a main valve seat (15a); a valve element (21) including an intermediate communication passage (29), a main valve portion (21b), and an auxiliary valve portion 21c; a solenoid (30) that drives a rod (36) provided with an auxiliary valve seat (23c); a first biasing member (43) that biases in a valve closing direction of the main valve portion (21b); and a second biasing member (44) that biases in a valve closing direction of the auxiliary valve portion (21c), wherein the rod (36) moves relative to the valve element (21) to open and close the auxiliary valve portion (21c). The capacity control valve allows a liquid refrigerant to be efficiently discharged and allows a driving force of a compressor to be decreased.

Techniques for diagnosing failures in a digital solenoid I/P converter are provided herein. A controller of the I/P converter may apply a fixed voltage to an I/P coil of the I/P converter, causing an armature to move from an off-position to an on-position in a properly-functioning I/P converter. The controller may receive an indication of whether a digital logic line trip has occurred, indicating that a current for the I/P coil has reached a desired maximum current level. The controller may remove the fixed voltage applied to the I/P coil when the maximum current level is reached or when a threshold period of time has elapsed from the application of the fixed voltage to the I/P coil. The controller may diagnose, based on whether the digital logic line trip occurred prior to removing the fixed voltage, a failure in the I/P converter.

A pneumatic valve apparatus for a compressed air device, including: a pneumatic solenoid valve having a housing body with a supply channel, a consumer channel and a vent channel, wherein the housing body surrounds a valve chamber, in which a valve body can be moved along a valve axis counter to the force of a valve spring by an actuator relative to a vent valve seat leading to the vent channel and relative to a supply valve seat leading to the supply channel, wherein in a first position, the valve body opens the valve chamber and the vent valve seat leading to a vent channel, and, in a second position, opens a supply channel leading to the supply valve seat and the valve chamber, wherein the housing body comprises a diffuser, which adjoins the vent valve seat leading to the vent channel.

An electromagnetic valve has a solenoid, which includes a coil, a plunger, a fixed core, and a plunger spring. The fixed core is E-shaped and has a base, a first outer leg, a second outer leg, and a central leg. The first outer leg, the second outer leg, and the central leg extend from the base. The first outer leg has a first outer attraction surface configured to attract the plunger. The second outer leg has a second outer attraction surface configured to attract the plunger. The central leg has a central attraction surface configured to attract the plunger. The central attraction surface is larger in area than each of the first and second outer attraction surfaces.

An electromagnetic flexure valve (1) including: a first pole piece (50a) and a second pole piece (50b); a flexure assembly (40) a portion of which is configured for movement between a first state adjacent the first pole piece and a second state adjacent the second pole piece; a coil (20) configured to receive electrical power from a power supply and to actuate the flexure assembly between the first and second states; and a biasing configuration configured to bias the flexure assembly into the first or the second state when the coil is not powered and irrespective of the current state of the flexure assembly such that a failsafe mode is provided.

An example system includes a valve assembly having: (i) a plurality of ports including an inlet port, an outlet port, and a vent port, (ii) a solenoid coil having a cavity therein, (iii) an armature slidably accommodated in the cavity of the solenoid coil, (iv) a magnet fixedly disposed within the solenoid coil, wherein the magnet applies a magnetic force on the armature in a distal direction, and (v) a spring applying a biasing force on the armature in a proximal direction; and a controller sending a signal having a particular polarity to the solenoid coil such that the signal is applied to the solenoid coil for a particular period of time, and resending the signal periodically every particular time interval.

A solenoid valve assembly is provided. The solenoid valve assembly includes a pilot assembly, a body, and a main poppet valve assembly. The pilot assembly includes a frame having an external wall and an internal wall forming an annular cavity. The body includes an inlet cavity, a channel, an outlet cavity, and a main poppet valve seat disposed in the channel between the inlet cavity and the outlet cavity. The main poppet valve assembly includes a main poppet valve and two movable sealing elements. The main poppet valve has a cylindrical shape having an internal diameter, an external diameter, and grooves. The main poppet valve is at least partially disposed in the annular cavity and configured to shut the main poppet valve seat. The movable sealing elements are disposed in the grooves to seal the main poppet valve to the external wall and the internal wall of the frame.

An example valve includes: (i) a valve body comprising a supply port and an operating port; (ii) a sleeve comprising a first opening fluidly coupled to the supply port, a second opening fluidly coupled to the operating port, and a seat; (in) a spool configured to move axially within the sleeve, wherein the spool is configured to he seated on the seat of the sleeve when the valve is unactuated, and wherein when the valve is actuated, the spool moves such that a gap is formed at the seat; and (iv) a flow restriction disposed downstream of the gap, wherein when the valve is actuated, fluid is allowed to flow from the supply port through the first opening and the gap and through die flow′ restriction prior to flowing through the second opening to the operating port, such that the flow restriction generates an increased pressure level at the gap.

An actuator arrangement for an electromagnetically actuatable valve comprises a housing having a first wall, and a second wall situated opposite the first wall, a solenoid armature, with first and second axial armature end surfaces facing toward the first and second housing walls respectively, movable along an axis between a first position, where the first end surface makes contact with the first wall, and a second position, where the first end surface is away from the first wall. A damping element of an elastomer material extends from the second end surface toward the second wall and contacts the second wall in the first and second positions of the solenoid armature, A stop element of an elastomer material extends from the second end surface toward the second wall and, in the first position, is away from the second wall and, in the second position, contacts the second wall.

A modular valve assembly is formed from multiple modular valves having a valve base and a valve actuator. Each base includes at least a first channel and a second channel and an internal passage forming an opening in the first channel so as to be in selective fluid communication with an exterior port of the valve base, and with the second channel being a through passage that is not in fluid communication with the internal passage. Adjacent valve bases are interconnectable in one of two orientations either with the first and second channels of one valve base being aligned with the first and second channels, respectively, of an adjacent valve base, or with the first and second channels of one valve base being aligned with the second and first channels, respectively, of an adjacent valve base. The valve bases may be provided with third and fourth channels for three-way operability.