Patent ID: 6047948
Filing Date: 2000-04-11
Classification: F02M

Abstract:
A fuel injection nozzle comprising:a nozzle body with nozzle a hole formed at a front end portion thereof through which pressurized fuel is injected;a needle valve inserted slidably in said nozzle body to open and close said nozzle hole;a spring that applies a force to said needle valve in a direction in which said nozzle holes are closed;an armature provided on an extended line of an axis of said needle valve that becomes displaced along with said needle valve;a stator provided facing opposite said armature on an extended line of said axis of said needle valve that electromagnetically attracts said armature against said force applied by said spring when power is supplied to said stator;a first micromotor that is driven and controlled by an external signal,a lift quantity changing mechanism that enables displacement of said stator on an extended line of said axis of said needle valve by employing said first micromotor in order to ensure that a maximum lift quantity of said needle valve can be varied;a cover member that rotates slidably around a circumference of said nozzle body with blocking portions for varying blockage of said nozzle holes in correspondence to a degree of rotation thereof formed as an integrated part; anda second micromotor that is driven and controlled by an external signal wherein:said rotation of said cover member is enabled by said second micromotor to vary opening area of said nozzle holes contributing to injection.