| 摘要 |
A fuel rail for the distribution of fuel is disclosed. The fuel rail includes an extending primary conduit having a first open end for receiving fuel and a second open end for returning fuel. The primary conduit has a plurality of ports for injector cups disposed in spaced intervals between the two ends. The fuel rail further includes a secondary conduit extending over a portion of the primary conduit. The secondary conduit is closed at its ends to form a cavity between the portion of primary conduit and the secondary conduit. Fluid communicates between the primary conduit and the cavity through small apertures disposed in the portion of the primary conduit. A vapor fuel return conduit is selectively opened to the cavity when the fuel reaches a predetermined temperature. When the fuel return conduit is opened to the cavity, the increase in volume of the fuel rail causes some of the liquid fuel in the primary conduit to change to vapor as it goes through the small apertures. The transformation between a liquid to a gas state cools the liquid and absorbs the heat of the fuel rail. |
