Patent ID: 6755629
Filing Date: 2004-06-29
Classification: F02M,F04B,Y10T

Abstract:
A fuel injection pump for pressurizing fuel in a pressurizing chamber and for supplying pressurized fuel to a common rail, the fuel injection pump including a one-way valve that allows fuel to flow into the pressurizing chamber and prevents fuel from flowing out of the pressurizing chamber, the one-way valve comprising:a valve body having a valve seat; a valve member having a valve surface adapted to seat on the valve seat, the one-way valve being closed when the valve surface seats on the valve seat and being opened when the valve surface is separated from the valve seat; a biasing member biasing the valve member in a direction to close the one-way valve; and a supporting member for supporting the biasing member between the valve body and the valve member, wherein: the valve member includes a flange portion formed at one end of the valve member, a cylindrical portion connected to the flange portion, a head portion formed at the other end of the valve member, and a neck portion connecting the head portion to the cylindrical portion; the supporting member includes a through-hole, in which the neck portion is rotatable when the head portion and the neck portion are inserted into the through-hole, and a groove formed on the supporting member crossing the through-hole; and the head portion engages with the groove thereby to couple the supporting member to the valve member.