Patent ID: 6585171
Filing Date: 2003-07-01
Classification: F02M

Abstract:
A fuel injector, comprising:one of a piezoelectric actuator and a magnetostrictive actuator that includes a tubular shape; a valve needle including an axial longitudinal opening and passing through the one of the piezoelectric actuator and the magnetostrictive actuator; a valve seat surface; a valve closing body that is operable by the one of the piezoelectric actuator and the magnetostrictive actuator via the valve needle and works together with the valve seat surface to form a sealing seat; a fuel inlet connection; and a fuel line leading from the fuel inlet connection to the sealing seat, the valve needle forming a section of the fuel line that is surrounded by the one of the piezoelectric actuator and the magnetostrictive actuator in at least one section, wherein: the valve needle includes a first valve needle section arranged on an inlet end and a second valve needle section on a spray end that is one of connected to the valve closing body and formed as one piece with the valve closing body, only the first valve needle section extends through the one of the piezoelectric actuator and the magnetostrictive actuator, and a connection of the first valve needle section and the second valve needle section is located downstream from a flow passage through the one of the piezoelectric actuator and the magnetostrictive actuator.