Accumulator fuel injection device

A pressure regulation valve for controlling a fuel pressure of an accumulator in an accumulator fuel injection device comprising integrally of:

• an armature chamber, an armature moving in the armature chamber, a control chamber introducing the fuels in the accumulator, a valving element and a shaft moving integral with the armature so as to move the valving element,
• the pressure regulation valve wherein escaped volumes of the fuels from the accumulator to the control chamber are adjusted by moving the valving element with the movement of the armature and the shaft so as to open and close the passage between the accumulator and the control chamber,
• wherein the shaft is provided with a first continuous hole communicating with the control chamber, and the armature is provided with a second continuous hole communicating with the first continuous hole and the armature chamber, so that the pressure equalizing means for equalizing the pressures of the control chamber and the armature chamber is comprised of the first continuous hole and the second continuous hole and the second continuous hole has a continuous hole consisting of a chase on the outer peripheral portion of the armature and a cylindrical member that incorporates the armature with no space.