Patent ID: 7422001

Claim:
An accumulation fuel injection apparatus for engines, the apparatus having a common rail for accumulating high pressure fuel to be supplied to fuel injection valves of engine cylinders, the common rail having high pressure fuel outlets provided equally spaced in the common rail along longitudinal direction thereof for the high pressure fuel in a fuel accumulation chamber of the common rail to be supplied to the fuel injection valves, wherein a pressure detection room is formed at an end part of said accumulation chamber such that said pressure detection room is connected to the accumulation chamber where the high pressure fuel outlets are provided, an orifice is provided between said pressure detecting room and said accumulation chamber to communicate said pressure detection room with said accumulation chamber by a throttled sectional area, and a common rail pressure sensor for detecting fuel pressure in said accumulation chamber is attached to an end of the common rail to face said pressure detection room, wherein a distance between a sensing end face of said common rail pressure sensor and said orifice is the same as the spacing between each of said high pressure fuel outlets and wherein a distance between said orifice and a center of a high pressure fuel outlet positioned nearest to said orifice is the same as that of the spacing between each of said high pressure fuel outlets.