Patent ID: 7527210

Claim:
A fuel injector for an internal-combustion engine, comprising: a hollow casing, fixed on which is a nozzle having a nebulizer for the fuel under pressure; an axially mobile needle for opening and closing said nebulizer by a first end thereof; and a rod for controlling said needle, said rod being substantially coaxial with said needle and engaging with one end thereof a second end of said needle, said needle being normally pushed into a closing position of said nebulizer by the fuel under pressure acting on said rod, aided by a compression spring, said spring acting on said needle through a perforated intermediate member, which is in axial engagement with a portion of said rod adjacent to said one end of said rod, said intermediate member having a first region designed to engage at a front portion and directly said second end of said needle, said intermediate member also having a second region at a rear portion, the second region having an external diameter greater than an external diameter of the first region, said spring engaging said second region in such a way that said intermediate member transmits the corresponding action directly onto the second end of said needle.