| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a quiet gas fuel injection valve by preventing a peeling phenomenon of a gas fuel flow at a border portion between a throttle hole and a nozzle hole. <P>SOLUTION: In the gas fuel injection valve, a single nozzle member 11 is fixed to the front end of a valve housing 2; and a valve seat 13, a valve hole 45 penetrating the center of the valve seat, a throttle hole 46 which connects to the outlet of the valve hole 45 and has a smaller diameter than the valve hole, and a nozzle hole 48 which connects to the outlet of the throttle hole 46 and has a larger diameter than the throttle hole are formed in the nozzle member 11. If the inner diameter of the throttle hole 46 is D1, the length of the throttle hole 46 is L1, the inner diameter of the nozzle hole 48 is D2, and the length of the nozzle hole 48 is L2, the expressions L1/D1>1...(1) and 1<D2/D1≥1.2...(2) are satisfied. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
