Patent ID: 7921827

Claim:
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 valve seat having a passage formed between the accumulator and the control chamber, 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 so as to open and close the passage in the valve seat, wherein the passage in the valve seat is provided with an attenuating chamber and the attenuating chamber is provided on each of the side of the accumulator and the side of the control chamber with apertures, so that a pressure attenuating means for attenuating the pressures transmitted from the accumulator via the passage to the valve seat is comprised of the attenuating chamber and both apertures.