| 摘要 |
<p>A vehicle fuel pumping unit wherein a reserve fuel supply container is located within the fuel tank to supply liquid fuel to a motor-operated pump when the tank is nearly empty. The invention addresses the problem of pump starvation when the tank is nearly empty and the liquid fuel is held away from the pump intake passage due to abrupt sustained turning or other maneuvers of the vehicle. In preferred practice of the invention normal fuel flow from the tank to the pump is controlled by an annular float valve located directly below the reserve fuel supply container; fuel flow from the reserve container is controlled by a pressure-responsive valve located in the section path between the container and the pump intake, said pressure-responsive valve being part of a sub-assembly including a liquid fuel filter screen for filtering all fuel from the container and a valve seat for the pressure-responsive valve.</p> |
