Patent ID: 6725843
Filing Date: 2004-04-27
Classification: F02B,F02M,F04B,Y02T

Abstract:
A fuel injection pump comprising:at least one movable member for pressurizing fuel; a drive mechanism that drives the at least one movable member and includes a drive shaft; a housing that includes at least one cylinder and a receiving chamber, which are communicated with each other, wherein each cylinder reciprocably supports a corresponding one of the at least one movable member therein and defines a pressurizing chamber in cooperation with the corresponding movable member, and the receiving chamber receives the drive mechanism; a feed pump assembly that is driven by the drive shaft and pumps fuel to the pressurizing chamber, wherein the feed pump assembly includes a discharge port, through which pressurized fuel is discharged from the feed pump assembly toward the pressurizing chamber; and a tubular member that is arranged between the drive shaft and the housing in a radial direction of the drive shaft and includes a fuel groove formed in an inner wall of the tubular member, which is in sliding contact with the drive shaft, wherein the fuel groove communicates between the discharge port and the receiving chamber.