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.

Disclosed are example embodiments of an electronic fuel injection device. In one example embodiment, the electronic fuel injection device includes: a yoke having an inner chamber; an armature and a plunger slidably disposed inside the inner chamber of the yoke; a cylindrical bobbin configured to receive the yoke; an electromagnetic coil disposed around an outside surface of the cylindrical bobbin; and a fuel return path formed between an outer surface of the yoke and an inner surface of the cylindrical bobbin. The inner surface of the cylindrical bobbin comprises surface cooling features, including channels or protrusions, configured to remove heat from the cylindrical bobbin.

A vehicle fuel injector is configured to inject a high-pressure vehicle fuel received from a fuel rail into a combustion chamber. The vehicle fuel injector includes a nozzle which includes a plurality of discharge flow paths which are disposed to be spaced apart from each other in a circumferential direction and pass through the nozzle in a longitudinal direction, and outward flow paths formed on an inner circumferential surface of the nozzle, the nozzle having a hollow shape, and a needle bar which is formed to pass through the inner circumferential surface of the nozzle and vertically reciprocally moves on the inner circumferential surface of the nozzle, where rotation of the needle bar is adjusted in a left or right direction so that the nozzle is opened or closed.

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 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.

The present invention provides a common rail fuel injector for a diesel engine. A valve seat of a fuel injector control valve adopts a T-shaped structure with a slot hole (2001c), and liquid passes through the slot hole of the valve seat of the control valve to control hydraulic pressure at a tail portion of a needle valve. A T-shaped pilot valve seat adopts a floating mounting structure: a large end of the T-shaped control valve seat faces downwards; a long column of the T-shaped pilot valve seat is slidably assembled in a central hole of a fuel injector body; a large end of the T-shaped control valve seat and the central hole of the fuel injector body are provided with a seal seat surface matched with each other.

A positioning feature includes a first member so that in an embodiment where the pins of a connector are perpendicular to a main axis, an incorrect angular orientation is prevented by the positioning feature that would contact one of the pins and, a correct angular orientation is assured by the engagement of the first member between the pins.

A vehicle fuel injector is configured to inject a high-pressure vehicle fuel received from a fuel rail into a combustion chamber. The vehicle fuel injector includes a nozzle which includes a plurality of discharge flow paths which are disposed to be spaced apart from each other in a circumferential direction and pass through the nozzle in a longitudinal direction, and outward flow paths formed on an inner circumferential surface of the nozzle, the nozzle having a hollow shape, and a needle bar which is formed to pass through the inner circumferential surface of the nozzle and vertically reciprocally moves on the inner circumferential surface of the nozzle, where rotation of the needle bar is adjusted in a left or right direction so that the nozzle is opened or closed.

In a valve apparatus, a housing includes a plurality of through holes through which a fluid flows. A first valve member opens and closes a first through hole. A second valve member opens and closes at least one second through hole. A fixed core does not move relative to the housing. A coil forms magnetic field. A first movable core moves integrally with the first valve member. When the coil forms the magnetic field, a magnetic attractive force is generated between the first movable core and the fixed core. A second movable core moves integrally with the second valve member. When the coil forms the magnetic field, a magnetic attractive force is generated between the second movable core and the fixed core. A magnetic constriction portion is provided between the fixed core and the first movable core. The second through hole is opened after the first through hole is opened.

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.