Patent ID: 7438242

Claim:
A fuel injector ( 1 ) comprising: an injection nozzle ( 3 ); an injection valve ( 7 ) having a movable pin ( 20 ) for regulating fuel flow through the injection nozzle ( 3 ); an electromagnetic actuator ( 6 ) for moving the pin ( 20 ) between a closed position and an open position respectively closing and opening the injection valve ( 7 ); and a tubular supporting body ( 4 ), which has a central channel ( 5 ) extending the full length of the supporting body ( 4 ) to feed pressurized fuel to the injection nozzle ( 3 ), and houses the electromagnetic actuator ( 6 ), the injection valve ( 7 ), and the pin ( 20 ); the supporting body ( 4 ) has a tubular top member ( 8 ) housing the electromagnetic actuator ( 6 ), and a tubular bottom member ( 9 ) housing the injection valve ( 7 ); the injector ( 1 ) being characterized in that the tubular top member ( 8 ) of the supporting body ( 4 ) is made of high-tensile steel with poor magnetic characteristics; wherein the supporting body ( 4 ) is formed by joining the tubular top member ( 8 ), which is formed in one-piece, and the tubular bottom member ( 9 ), which is also formed in one piece; and wherein the tubular top member ( 8 ) has a cylindrical seat, which is threaded internally to receive a threaded portion of the tubular bottom member ( 9 ).