A control device for a motor-driven fuel pump adapted for an internal combustion engine is provided. The fuel pump includes a cylinder, a mover in the cylinder, and an electric actuator configured to move the mover. The control device is configured to perform energization control on the electric actuator to reciprocate the mover so that the fuel pump draws in and discharges fuel. The control device is also configured to control a discharge count and a unit discharge amount based on an operating state of the internal combustion engine. The discharge count is a number of times of discharging fuel from the fuel pump to the fuel pipe during a period between a fuel injection from the fuel injection valve and the next fuel injection, and the unit discharge amount is an amount of fuel for one fuel discharge from the fuel pump.

A fuel pump includes an intake valve unit which is provided between a low-pressure chamber and a pressurizing chamber. The intake valve unit includes an intake valve configured to move in an axial direction of the intake valve unit and a valve stopper arranged between the intake valve and the pressurizing chamber. A plurality of fuel passages configured to allow fuel to communicate between the low-pressure chamber and the pressurizing chamber are formed on a radially outward of an outer peripheral surface of the valve stopper.

The invention relates to a fuel injector arrangement (1) comprising a number of fluid supply paths (29, 31, 39), namely, a first (29), a second (31) and a third fluid supply path (39). The fuel injector arrangement (1) has a first switching device (43) in the second fluid supply path (31). Said first switching device, controlled by the fluid pressure in the third fluid supply path (39), opens or blocks the second fluid supply path (31). The fuel injector arrangement (1) has a second switching device (49) in the first fluid supply path (29). Said second switching device, controlled by the fluid pressure downstream of the first switching device (43) in the second fluid supply path (31), opens or blocks the first fluid supply path (29).

A high-pressure pump includes a pressurizing chamber forming portion including a cylindrical inner peripheral wall that defines a pressurizing chamber, a plunger, a housing including a housing outer peripheral wall, a valve member, an electromagnetic driving unit, a discharge passage portion, and a fixed portion that is connected to the housing. The fixed portion has multiple bolt holes. The multiple bolt holes are arranged radially outward of the housing outer peripheral wall in a circumferential direction when viewed along a direction of an axis of the cylindrical inner peripheral wall. The high-pressure pump is virtually divided into a first region and a second region by a virtual surface on which axes of adjacent ones of the multiple bolt holes and an axis of the cylindrical inner peripheral wall extend. Both the electromagnetic driving unit and the discharge passage portion are located in the first region or the second region.

An injector is provided, comprising an injector body comprising an inlet passage configured to receive fluid, at least one injection outlet configured to deliver fluid, and a central bore, a needle valve disposed for reciprocal movement within the central bore between a closed position and an opened position; and an actuator configured to move the needle valve between the closed position wherein a first portion of a surface of the valve tip engages a first portion of a surface of the injector body to form a first seal that inhibits flow through the at least one injection outlet, and the opened position wherein a second portion of the surface of the valve tip engages a second portion of the surface of the injector body to form a second seal that inhibits flow through the drain outlet.

An electromagnetic actuator of a valve device, in particular in a common rail system of a motor vehicle, comprising an armature for actuating a valve element located in a duct, said armature being arranged in a housing and being movable axially along a longitudinal axis of the actuator when an excitation coil is energized, further comprising a pole core, characterized in that the electromagnetic actuator is designed as an electromagnetic adhesive system that comprises a plate-type armature which entirely covers planar end faces of the pole core that extend orthogonally to the longitudinal axis.

A high-pressure fuel supply pump includes a pressurizing chamber, a piston plunger, and an electromagnetically-driven intake valve mechanism. The piston plunger reciprocates within the pressurizing chamber. The electromagnetically-driven intake valve mechanism is provided at an inlet of the pressurizing chamber. The electromagnetically-driven intake valve mechanism includes an anchor which pulls a plunger rod, a fixed core which attracts the anchor, and a yoke in which inner peripheral part has the fixed core and the anchor. The fixed core is fixed to a bottom part of the yoke. A through hole is formed at a bottom part of the fixed core.

An electromagnetic actuator includes an armature which has a stop face, and a pole piece which has a counter stop face, wherein the stop face and the counter stop face in terms of geometry are configured so as to be mutually complementary such that the stop face and the counter stop face in a movement of the armature toward the pole piece engage in one another, displacing a medium which is disposed between the stop face and the counter stop face. An electromagnetic valve may include the electromagnetic actuator, and a high-pressure fuel pump may include the electromagnetic valve.

The invention relates to a fuel injector arrangement (1) comprising a number of fluid supply paths (29, 31, 39), namely, a first (29), a second (31) and a third fluid supply path (39). The fuel injector arrangement (1) has a first switching device (43) in the second fluid supply path (31). Said first switching device, controlled by the fluid pressure in the third fluid supply path (39), opens or blocks the second fluid supply path (31). The fuel injector arrangement (1) has a second switching device (49) in the first fluid supply path (29). Said second switching device, controlled by the fluid pressure downstream of the first switching device (43) in the second fluid supply path (31), opens or blocks the first fluid supply path (29).

A device and a method are provided for determining a stroke of an armature of a magnetic valve which has a coil and the armature is displaceable by magnetic force, including: providing at least one reference data set which includes a magnitude of a current through the coil and a magnitude of the magnetic flux in the case of a known magnitude of the stroke; generating a current flow through the coil of the magnetic valve in order to generate a magnetic field for generating a magnetic force on the armature, which magnetic force displaces the armature in the direction for the opening of a closure element coupled to the armature; determining a magnitude of the magnetic flux when the armature abuts against a driver of the closure element; and determining the magnitude of the stroke based upon the determined magnitude of the magnetic flux and the reference data set.