Abstract: A fuel injector includes a housing extending axially along an injector axis from a proximal end to a distal end and having a nozzle at the distal end; a pintle having an axially extending pintle shaft, the pintle being axially movable between an opened position and a closed position in which it closes the nozzle; and an armature arranged to be movable along the injector axis between a proximal position and a distal position and having an axial through-hole in which the pintle shaft is received. The armature includes an annular end wall portion defining a planar surface able to come at least partially into contact with a stopping surface in a rest position, the planar surface defining a contact plane transversal to injector axis. The annular end wall portion has inner and outer sides, each having an annular edge with the planar surface.

Abstract: A fuel injector comprising: a housing extending axially along an injector axis from a proximal end to a distal end and having a nozzle at the distal end, a pintle having an axially extending pintle shaft, the pintle being axially movable between an open position and a closed position in which it closes the nozzle from the inside, an armature disposed in a cavity of the housing to be axially movable between a proximal position and a distal position and having an axial through-hole in which the pintle shaft is received, a magnetic coil, and a pole piece disposed in the housing-proximally of the armature. At least one axially movable element of the fuel injector comprises a first contact surface for engaging an axially opposite second contact surface of another element. One of the contact surfaces is a divided contact surface.

Abstract: A solenoid valve which regulates the pressure in a pressurized fuel injection system includes a body containing a needle that is pressed by an electromagnet including a coil and a magnetic core. The core has a cavity that is in fluid communication via an internal channel with a counterbore in the body into which the needle protrudes and into which fuel flows during use. The core also has a restriction which restricts the fluid communication and which attenuates pressure waves propagating in the fuel to prevent the waves from moving the core.