| 摘要 |
<p>A fuel pump module 12, normally within a fuel tank 10, features a fuel pump 13, and jet inlet pump 40, which may feature a venturi arrangement. A portion 42 of fuel outlet from the fuel pump 13 is fed to the inlet pump 40 to power it, drawing fuel into the module 12. Control means 46, cuts the supply to the jet inlet pump 40 when a fuel level in the module 12 or surrounding fuel tank 10 exceeds a certain level, as measured and controlled by appropriate sensors and a control system 36. The cut off system may include a float and cut off valve arrangement (figs.2,3). As such under conditions of a full tank 10, or level of fuel in the tank 10 being such that the module 12 fills up naturally, such as via inlet 18, operation of the jet inlet pump 40 is not needed, and so it can be shut down.</p> |
