| 摘要 |
<p>An air assist atomizer (34) is used for obtaining a desired air flow through a fuel injector (10), the fuel injector (10) having an injector valve stem (48), and the injector valve stem movable over a displacement. The air assist atomizer (34) has an air passage (50) via which atomizing air enters and a fuel passage (52) via which atomized fuel exits. An injector seat (44) is mounted on a spring (46) for holding the injector seat (44) to the injector valve stem (48) over the displacement. The injector seat (44) is allowed to travel part of the displacement of the injector valve stem (48), whereby when the injector seat (44) moves, the air passage (50) is opened allowing bypass air to atomize the fuel. A mechanical stop (54) is provided for halting movement of the injector seat (44), while the injector valve stem (48) moves the remaining distance of the displacement, opening up the fuel passage (52).</p> |
