Patent ID: 6405712
Filing Date: 2002-06-18
Classification: F02M

Abstract:
A fuel distribution pipe in a fuel injection apparatus which increase a pressure of a fuel within a fuel source by a fuel pump to supply to the fuel distribution pipe and inject and supply the fuel to an engine via a fuel injection valve attached to the fuel distribution pipe, characterized that the fuel distribution path is pierced along a line Xâ€”X in a direction of a longitudinal axis of the fuel distribution pipe and an injection valve supporting hole for inserting and supporting a rear end portion of the fuel injection valve and a fuel introduction path for supplying a fuel having a pressure increased by a fuel pump are continuously provided in said fuel distribution path of the fuel distribution pipe, and that a cooling water flow path extending along the line Xâ€”X in the direction of the longitudinal axis of the fuel distribution path and sectioned from the fuel distribution path is provided on an outer periphery of said fuel distribution path, thereby introducing a cooling water into said cooling water flow path;wherein a cooling water introduction path and a cooling water discharge path are opened to said cooling water flow path, thereby circulating the cooling water within the cooling water flow path; wherein the fuel distribution path and the cooling water flow path are formed within the fuel distribution pipe in a sectional manner by forming the fuel distribution path and the cooling water flow path formed in said fuel distribution pipe so as to be opened in one and portion by a casting process and closing said one end portion by one side closing member, and the fuel introduction path connected to the fuel distribution path and a cooling water introduction path connected to the cooling water flow path are provided in said one side closing member.