Patent ID: 6478013
Filing Date: 2002-11-12
Classification: F02D,F02M

Abstract:
A fuel injector, comprising:one of a piezoelectric actuator and a magnetostrictive actuator; an actuating path; a valve seat surface; and a valve closing body that can be actuated by the one of the piezoelectric actuator and the magnetostrictive actuator via the actuating path, wherein: the valve closing body works together with the valve seat surface to form a sealing seat, a gap is formed in the actuating path in a non-energized rest state of the one of the piezoelectric actuator and the magnetostrictive actuator due to which the one of the piezoelectric actuator and the magnetostrictive actuator has no effective contact on the valve closing body to lift the valve closing body from the valve seat surface, the gap is formed outside hydraulic areas and lines of the fuel injector, and the gap is filled exclusively with a gaseous medium that can be rapidly vented when the one of the piezoelectric actuator and the magnetostrictive actuator is operated.