Patent ID: 7273186
Filing Date: 2007-09-25
Classification: F02M,F16K

Abstract:
1. A fuel injector constituted of a nozzle body and a solenoid valve attached to a nozzle holder and configured so that injection of fuel from the nozzle body is controlled by the solenoid valve, which fuel injector is characterized in that: the solenoid valve comprises an electromagnet equipped with a magnetic pole, an armature bolt having a valve member attached at one end and formed at its other end with a head portion, a support/guide member for supporting and guiding the armature bolt to enable it to move toward and away from the magnetic pole, a spring member for spring-biasing the valve member in the direction of valve closing, a stopper member disposed opposite the head portion for limiting a maximum stroke of the valve member and an armature plate through which the armature bolt passes so as to locate it between the head portion and the valve member and which collaborates with the electromagnet to move the armature bolt toward the stopper member against the spring force of the spring member, the contact area between the armature plate and the head portion being larger than the contact area between the head portion and the stopper member.