Patent ID: 7410347

Claim:
A fuel injector for spraying fuel into a cylinder of an internal combustion engine, comprising: a first end; a second end; at least one permanent magnet fixedly attached to the first end; a coil bobbin disposed about the at least one permanent magnet and being reciprocally movable between a first position near the first end and a second position towards the second end; a coil wound on the bobbin; a plunger operatively connected to the coil bobbin and disposed between the at least one permanent magnet and the second end; a first biasing spring for biasing the plunger and the coil bobbin towards the first end, the first biasing spring being disposed between the coil bobbin and the second end; a pump chamber for receiving fuel disposed between the plunger and the second end; a first passage for introducing fuel into the pump chamber; a second passage at the second end being in fluid communication with the pump chamber; a poppet disposed in the second passage being movable between an open position and a sealed position; and a second biasing spring for biasing the poppet towards the sealed position, movement of the coil bobbin towards the second position thereof causing movement of the plunger towards the second end, movement of the plunger towards the second end pressurizing fuel in the pump chamber, the poppet moving to its open position once fuel pressure in the pump chamber is high enough to overcome the bias of the second biasing spring.