Patent ID: 6631854
Filing Date: 2003-10-14
Classification: F02B,F02M,Y02T

Abstract:
A fuel injector, comprising:one of a piezoelectric actuator and a magnetostrictive actuator; a valve needle; a valve-closure member capable of being actuated by the one of the piezoelectric actuator and the magnetostrictive actuator in accordance with an operation of the valve needle; and a valve seat surface including at least two spray-discharge openings, the valve-closure member configured to cooperate with the valve seat surface to form a sealing seat that seals the at least two spray-discharge openings, wherein: at least one of the valve seat surface and the valve-closure member includes partial areas that are arranged so as to be offset on a circumference, and the partial areas throttle a fuel flow to differing extents through the spray-discharge openings as a function of a stroke of the valve needle.