Patent ID: 6899284

Claim:
A fuel injector for a fuel-injection system of an internal combustion engine comprising: a valve needle; a valve-seat surface; a valve-closure member connected to the valve needle, the valve-closure member cooperating with the valve-seat surface to form a valve-sealing seat; a valve member; an actuator housing which, at a first end on a valve-needle side, is connected to the valve member by force-locking, the actuator housing having a compensation section composed of a material having one of: (a) substantially no and (b) negative temperature expansion, so that a temperature expansion of the actuator housing and the valve member, in a sequence up to the valve-sealing seat, substantially corresponds to a temperature expansion of the actuator and transmission elements situated up to the valve-sealing seat; an actuator for actuating the valve needle, the actuator being situated in the actuator housing, the actuator being supported at a second end of the actuator housing which is opposite to the first end, the actuator being one of a piezoelectric actuator and a magnetostrictive actuator; and a first fuel chamber through which fuel flows, the first fuel chamber radially surrounding the actuator housing on the outside.