A solenoid assembly of a fuel pump is disclosed, including a housing having an open end and a partly closed end; a pole piece fixedly disposed within the housing; a bobbin assembly disposed within the housing and including a coil disposed proximal to the pole piece; and a bobbin retainer disposed between the open end of the housing and the bobbin assembly, a radially outer surface of the bobbin retainer contacting the housing. A portion of the housing which is adjacent the bobbin retainer has an outer surface that is recessed and an inner surface that protrudes against the bobbin retainer. The portion is created by deforming the housing to create the protrusion on the inner surface of the housing. The housing inner surface protrusion provides a press fit engagement with the bobbin retainer.

A fuel pump, is disclosed, including a power group having a housing, a coil, a pole piece and a movable armature; a valve group including a valve body, a plunger connected to the armature, a bushing in which the plunger is disposed, an inlet chamber, an outlet chamber, a pump chamber, an inlet valve disposed between the inlet chamber and the pump chamber and an outlet valve disposed between the pump chamber and the outlet valve; and an inlet filter coupled to a fluid inlet of the valve group. The inlet filter is disposed relative to the coil such that when the fuel pump is disposed within a fuel tank, a bottom of the inlet filter as oriented in the fuel tank is disposed above a fuel level in the fuel tank and the coil is at least partly submerged in the fuel.

A valve assembly for a fluid pump includes a valve body; an inlet disk movably disposed in the valve body; an outlet disk movably disposed in the valve body; and a valve seat fixed within the valve body. The valve seat includes a first aperture defined axially through the valve seat in a radial central portion thereof, and one or more second apertures disposed at least partly around the first aperture. The inlet disk is biased in a closed position against the valve seat along a first surface thereof, the closed position of the inlet disk covering the one or more second apertures of the valve seat. The outlet disk is biased in a closed position against the valve seat along a second surface thereof.

A valve assembly for a fluid pump includes a valve body; a fluid inlet and a fluid outlet defined in the valve body; a valve seat; and an inlet disk disposed in the valve body having an inner portion, an outer portion fixed within the valve body, and a plurality of legs connected between the inner portion and the outer portion so that the inner portion is movable between a first position against the valve seat and a second position spaced apart from the valve seat. The connection between the legs, the inner portion and the outer portion provides a spring bias force to the inner portion against movement of the inner portion from the first position. The plurality of legs, the inner portion and the outer portion are configured such that the spring bias force is asymmetric as applied to the inner portion of the inlet disk.

A fluid pump valve assembly includes: a valve body; a fluid inlet and a fluid outlet defined in the valve body; an inlet disk and an outlet disk movably disposed in the valve body; and a valve seat fixed within the valve body and including a disk member including at least one first aperture defined axially through the disk member, and at least one second aperture defined axially through the disk member, the inlet disk and the valve seat forming at least part of an inlet valve and the outlet disk and the valve seat forming at least part of an outlet valve. An inlet chamber is disposed upstream of the inlet valve, a pump chamber is disposed between and in fluid communication with the inlet valve and the outlet valve, and an outlet chamber is disposed downstream of the outlet valve. The inlet chamber surrounds the outlet chamber.

A solenoid assembly of a fuel pump includes a housing; a pole piece disposed within the housing; an armature assembly movably disposed within the housing and including an armature and a plunger; and a coil disposed within the housing. A plurality of metal disks are disposed in a stacked arrangement, coupled to the pole piece and situated so as to be impacted by the armature during a full stroke of the armature assembly. The solenoid assembly further includes at least one fluid path in fluid communication with the region surrounding the metal disks, the at least one fluid path configured such that only a portion of a secondary swept volume of fuel associated with the armature assembly during operation of the fuel pump passes through the region and decelerates the armature assembly when the armature assembly moves towards the pole piece responsive to a current passing through the coil.

When a suction pressure is lower than a set suction pressure, and a crank chamber pressure is higher than a control pressure in a second supply passage, a first valve body reduces an opening degree of a suction passage, and a second valve body opens a bleed passage. When the suction pressure is higher than the set suction pressure, and the crank chamber pressure is higher than the control pressure, the first valve body increases the opening degree of the suction passage, and the second valve body opens the bleed passage. When the crank chamber pressure is lower than the control pressure, the first valve body reduces the opening degree of the suction passage, and the second valve body closes the bleed passage.

A synthetic jet includes a casing, a vibrating membrane and a guiding channel. The casing has a chamber. The casing has an inlet and an outlet opposite to each other. The inlet and the outlet communicate with the chamber. The chamber is configured to accommodate gas. The outlet corresponds to a heat source. The vibrating membrane isolates and divides the chamber into a first subsidiary chamber and a second subsidiary chamber. The inlet communicates with the first subsidiary chamber. The second subsidiary chamber has a second subsidiary chamber opening communicating with the outlet. The guiding channel communicates with the first subsidiary chamber and the outlet. When being driven, the vibrating membrane reciprocally deforms towards the first subsidiary chamber and the second subsidiary chamber.

A relationship between tie rods and a valve seat bore in a fluid end. The profile of the valve seat bores are changed to allow the tie rods to pass through the fluid end without intersecting or intercepting the internal bore geometry, while still being compatible with industry standard internal components. A relationship between a plunger bore diameter and a flow area of a valve seat in a fluid end is used to identify acceptable fluid end casing designs that can be used with industry standard couplers, such as tie rods.

A relationship between tie rods and a valve seat bore in a fluid end. The profile of the valve seat bores are changed to allow the tie rods to pass through the fluid end without intersecting or intercepting the internal bore geometry, while still being compatible with industry standard internal components. A relationship between a plunger bore diameter and a flow area of a valve seat in a fluid end is used to identify acceptable fluid end casing designs that can be used with industry standard couplers, such as tie rods.