| 摘要 |
PURPOSE:To aim at prevention against drops of fuel and improvements in an injection effect, by making up a lower end form of a swirl bar into a conical form. CONSTITUTION:A tip part of a swirl bar 12 is made up into an inversed conical form of a tip angle theta. In case of constitution of the conventional examples, a passage area has been largely varied at a C position of a lower end of the swirl bar 12. This means that it was a main factor to suddenly change a fuel flow velocity, causing the generation of a swirl. In constant this, in case of the invention, the passage area is so constituted as to be varied so uniformly whereby the generation of the swirl is checkable in design, and since it is an inversed conical form, even if fuel is stuck to it, it droppable down before growing large, thus favorable atomization is securable. |
