| 摘要 |
PROBLEM TO BE SOLVED: To thin an injection hole plate and improve spray characteristics by reducing stress concentration generated at a welding section of the injection hole plate in an fuel injection valve device. SOLUTION: The fuel injection valve device is provided with a nozzle including a fuel passage inside thereof and having a valve seat formed on an end part thereof, a needle valve opening and closing the fuel passage by touching and separating from the valve seat, and the injection hole plate provided on a tip part of the nozzle and injecting fuel in the fuel passage while the needle valve is open, and has the injection hole plate and the nozzle welded and fixed under a condition where even gap is formed. COPYRIGHT: (C)2007,JPO&INPIT |
