Abstract: An electric pump device of an aspect of the invention includes a state determination unit and a gain adjusting unit. The state determination unit determines whether or not the electric pump device is in a stable state where a required oil pressure is supplied to a hydraulic operating device by maintaining a rotation state of a motor. The gain adjusting unit adjusts a gain for a current feedback control so as to reduce responsiveness of the current feedback control when the state determination unit determines that the electric pump device is in the stable state.

Abstract: Methods and systems are provided for pressurizing a transmission hydraulic circuit including a transmission mechanical pump coupled to an engine though a gearbox. One example method comprises, during an engine start, adjusting a speed ratio between the transmission pump and the engine between a first speed ratio and a second speed ratio, the pump rotating faster relative to the engine at the first speed ratio as compared with the second speed ratio. In this way, the pump may be driven at different speed ratios relative to the engine to provide better pressurization in the transmission.

Abstract: In an electric pump system, hydraulic fluid that is stored in an oil pan is supplied to a transmission mechanism through an oil passage by driving an oil pump with the use of a motor. An EOPECU estimates a hydraulic pressure of the hydraulic fluid on the basis of a driving current for the motor and a rotation speed of the motor, and executes drive control on the motor on the basis of the estimated hydraulic pressure value.

Abstract: A ventilation assembly for a heat exchanger of a motor vehicle, has plate-like support structure with a main flow opening. A ventilator, including an electric motor and a fan, is mounted in the main flow opening. A voltage regulating device is fixed to the support structure and connected to the electric motor. The voltage regulating device has a support casing and a heat dissipater connected to the support casing. The voltage regulating device is fixed to the support structure in the region of but outside of the main flow opening, with the support casing and the heat dissipater being disposed in planes which are at least approximately parallel with the axis of the fan and of the main flow opening.

Abstract: The invention relates to an underwater conveying assembly with a pump (2) and with a drive device (3), in which the drive device (3) is sealed off with respect to the surrounding water and with respect to a process medium, the pump (2) and the drive device (3) being combined into a module (4), and the pump (2) having at least one inlet port (21) and at least one outlet port (22), the module (4) being assigned a collecting element (5), which tapers preferably in the direction of the inlet port (21), at least one suction lance (7) being flow-connected to the inlet port (21). It is possible to change over to a punctiform inlet port which precedes the collecting element (5).

Abstract: The piezoelectric pump comprises a housing, containing the following components connected in series: a rear piezoelectric clamp section, a piezoelectric extender section and a front piezoelectric clamp section. A displacer of pumped fluid is connected to the front piezoelectric clamp section. Electric pulses accessing at sections from a control station cause said sections to become fixed alternately inside the housing. Under the effect of electric pulses, the piezoelectric extender section moves the displacer step-by-step in one direction. Positive effect achieved by the invention is that of increasing the service life of the piezoelectric pump, expanding the scope of use thereof by increasing the number of fluids that can be pumped and also providing for a greater pressure by preventing contact between the pumped fluid and the friction surfaces of the housing and the piezoelectric clamp sections.

Abstract: A device for throttling a fluid flow includes a basic body which has at least one throttle point with a predefinable opening cross section. The basic body has a resilient configuration at least in a region of the at least one throttle point. Accordingly, the opening cross section of the at least one throttle point is configured to be set in a variable manner as a function of a pressure difference.

Abstract: An apparatus includes a bearing housing, a shaft assembly that extends through the bearing housing along a shaft axis, an annular groove formed on the shaft assembly, and a piston ring assembly that is engaged with the bearing housing and extends into the groove of the shaft assembly. The piston ring assembly includes a first ring portion and a second ring portion. The first ring portion has a first contact face that is oriented at a non-perpendicular with respect to the shaft axis, and the second ring portion has a second contact face that is oriented at a non-perpendicular angle with respect to the shaft axis and is engageable with the first contact face.

Abstract: A motor-driven compressor includes a compression unit, an electric motor, a housing that includes an accommodating chamber and a wiring connection port, a motor driving circuit that includes a substrate arranged in the accommodating chamber, wiring electrically connected to the substrate and extending out of the housing through the wiring connection port, and a resin sealing member fitted to the wiring connection port. The wiring includes a primary conductor, which has a first end connected to the substrate and a second end, and a secondary conductor, which is connected to the second end of the primary conductor and arranged outside the housing. The secondary conductor includes a wire portion and a sheath that is made of an insulating material and covers the wire portion. The sealing member covers the sheath and a junction between the primary conductor and the secondary conductor.

Abstract: A pump cartridge for use in a hydraulic braking system includes a sleeve having an outer surface and an inner bore. A piston has a first portion that is coaxially received within the sleeve inner bore. A second portion of the piston extends from the sleeve and is configured to reciprocate the piston first portion relative to the sleeve in response to rotation of an eccentric. A retainer engages the sleeve and is configured to maintain the first portion of the piston within the sleeve inner bore. A filter assembly is formed as a separate component and has a bore configured to permit the piston second portion to extend through the filter bore.

Abstract: A pump having an increased energy efficiency is provided. The pump has an internal power fluid column and a transfer piston which is reciprocatingly mounted about the power fluid column. The transfer piston defines a product fluid chamber, located above the transfer piston valve, and a transfer chamber, located below the transfer piston valve. The power fluid column has at least one passageway, which allows the fluid inside the power fluid column to be in communication with a power fluid chamber. The power fluid chamber, the transfer chamber, and the product chamber are situated coaxially about the power fluid column.

Abstract: A fluid mover includes a hollow body with a straight-through passage of substantially constant cross-section with an inlet end an outlet end for the entry and discharge respectively of a working fluid. A nozzle substantially circumscribes and opens into the passage intermediate the inlet and outlet ends. An inlet communicates with the nozzle for the introduction of a transport fluid, and a mixing chamber is formed within the passage downstream of the nozzle. The nozzle internal geometry and the bore profile upstream of the nozzle exit optimize the energy transfer between the transport fluid and working fluid. Working fluids are atomized to form a dispersed vapor/droplet flow with locally supersonic conditions within a pseudo-vena contracta, resulting in the creation of a supersonic condensation shock wave within the downstream mixing chamber by the condensation of the transport fluid. Methods of moving and processing fluids using the fluid mover are also disclosed.

Abstract: This disclosure relates a water pump, a system for cooling internal combustion engine components including a water pump, and a method for operating an internal combustion engine including a water pump. The water pump, system and method provide protection of the pump impeller during dry pump operation, such as when a watercraft engine is started while the watercraft is out of water, by dispensing fluid from a reservoir to the pump's impeller chamber. The fluid enters the chamber via a controllable flow path and interacts with the impeller and chamber walls to cool and lubricate the impeller.

Abstract: A vacuum pump comprises pumping elements arranged in a pumping chamber. An electric motor drives the pumping element. A frequency inverter is provided for changing the rotational speed of the electric motor. The frequency inverter is arranged in a frequency inverter housing immediately connected to the pump housing. An air cooler and a liquid cooler are arranged in the frequency inverter housing to cool the frequency inverter.

Abstract: In a fluid pump and cartridge assembly, a cartridge includes a material inlet port, a material outlet port, and a feed screw. The feed screw delivers fluid to be dispensed from the fluid inlet to the outlet port. The fluid inlet is preferably elongated in a direction along a longitudinal axis of the feed screw to enhance consistency in material flow through the cartridge. The feed screw is preferably driven by a closed-loop servo motor to achieve high-performance dispensing resolution. The assembly is preferably compatible with fixed-z and floating-z cartridges.

Abstract: Method for controlling a compressor element of a screw compressor, where the compressor element has a housing with two meshing helical rotors supported in the housing in the axial direction using at least one axial bearing. The method has a process A and/or a process B, where process A has a first step of switching on a first magnet during start-up of the compressor element, such that the magnet exerts a force on the rotor that is directed from an outlet side to an inlet side, and of switching off this first magnet during nominal operation of the compressor element; and where process B has a first step of keeping a second magnet switched off during start-up of the compressor element, and switching on this second magnet during nominal operation of the compressor element, such that this second magnet exerts a force that is directed from the inlet side to the outlet side.

Abstract: A stator housing assembly (3) for a pump (2) having a wet-running electric motor (8) includes a stator housing (4) and a can (6), wherein the stator housing (4) and the can (6) are designed as a single component (3). The stator housing assembly (3) also includes at least one engagement element (310) for positively connecting to a pump housing (14).

Abstract: An appliance containing a motorized appliance pump is provided. The appliance pump includes an integrated motor. The pump is an axial flow pump operable to move fluid along a fluid passageway.

Abstract: A liquid ring pump includes an external housing enclosing a volume including a lower fluid reservoir. A rotatable inner housing is within the volume of the external housing, the inner housing enclosing an inner fluid chamber. A pitot tube provides fluid communication between the lower fluid reservoir and the inner fluid chamber. The housings and pitot tube are adapted so that when the inner housing rotates, fluid flows from the lower fluid reservoir through the pitot tube into the inner fluid chamber to develop a liquid ring within the inner fluid chamber such that an inner radial wall of the liquid ring is just radially outward from a point where the pitot tube enters the inner fluid chamber.

Abstract: The ventilation device according to the invention includes a fan and an inverter. The fan comprises a rotary electrical machine and a wheel for setting an air flow into motion, integral with the rotary machine to set it in rotation. The inverter is connected to the rotary machine and, in one motor power mode of the ventilation device, is suitable for forming the supply current of the rotary machine. The inverter is suitable for being connected to a power supply network. The inverter is reversible and is, in a generating mode of the ventilation device, suitable for converting the electrical energy supplied by the rotary machine when it is driven mechanically by the wheel and injecting said converted electrical energy into the power supply network.