| 摘要 |
A fuel injector, in particular a fuel injector for fuel-injection systems of internal combustion engines, has a piezoelectric or magnetostrictive actuator (1), which is situated between a valve body (12) and an actuator head (15) and, by way of a valve needle, actuates a valve-closure member which cooperates with a valve-seat surface to form a sealing seat. A spherical sleeve (16), which in the longitudinal section is convexly formed between two diameters, seals the actuator (1) from a fuel chamber (14) and encloses the actuator (1), the spherical sleeve (16) being joined at its ends to the valve body (12) and the actuator head (15) by force-locking and being tensilely prestressed in a longitudinal direction of the actuator.
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