| 摘要 |
<p>A fuel pump has a pump inlet in fluid communication with a fuel tank and a pump outlet in fluid communication with a fuel metering system of an internal combustion engine. A fuel reservoir has a reservoir inlet in fluid communication with a pressurised fuel source, with a reservoir outlet in fluid communication with the pump inlet, and overflow valve between the reservoir and the fuel tank for allowing fuel to flow from said reservoir to the fuel tank when accumulated fuel in the reservoir causes pressure therein to exceed a predetermined overflow pressure. An overflow shut-off is also operatively associated with the overflow valve for selectively closing the overflow valve in response to the fuel level within the fuel tank to permit pressure in the reservoir to exceed the predetermined overflow pressure. A supply valve between the reservoir outlet and the pump inlet to prevent fuel flow from the reservoir to the pump until pressure in said reservoir reaches a predetermined release pressure greater the predetermined overflow pressure.</p> |
