Patent ID: 6681999
Filing Date: 2004-01-27
Classification: F02B,F02M,Y02T

Abstract:
A fuel injector, comprising:one of a piezoelectric actuator and a magnetostrictive actuator; a hydraulic temperature compensation device; a valve needle operable by the one of the piezoelectric actuator and magnetostrictive actuator via the hydraulic temperature compensation device; a valve seat face; a directional valve; and a valve closing body operable by the valve needle and cooperating with the valve seat face to form a sealing seat, wherein: the hydraulic temperature compensation device includes a needle driving sleeve that surrounds a valve needle shoulder of the valve needle and, together with a needle driving shoulder, surrounds the valve needle in sections, the needle driving sleeve together with the valve needle encloses a temperature compensation space, and the temperature compensation space is connected to a fuel inlet of the fuel injector via the directional valve, the directional valve filling the temperature compensation space with a fuel.