| 摘要 |
An object of the present invention is to provide a fuel path sealing structure for a fuel injection valve that is capable of preventing a high pressure fuel leak by increasing the seal surface pressure between a first body such as an injector housing (2), and a second body such as a nozzle body (3) to thus permit an increase in the seal surface pressure without a change to the size of the nozzle nut (9) or the corresponding tightening force. The present invention is directed toward the formation, over a predetermined surface area, of slightly shallow micro-recesses (31), in regions other than the high pressure fuel paths (13) and (14) and the periphery (2A) of the seal surfaces (24) and (25), that is, at the center of the seal surface. The present invention is characterized in that slightly shallow micro-recesses (31) are formed over a predetermined surface area of at least either one of the first seal surface (24) of the first body (2) and the second seal surface (25) of the second body (3), avoiding the first fuel path (13), second fuel path (14), and the respective periphery (2A) of the first body (2) and the second body (3). <IMAGE> |
