| 摘要 |
An accumulator for a no-return fuel system for a vehicle engine with fuel injectors. The accumulator has a housing with a flexible diaphragm between first and second chambers and a spring in one chamber yieldably closing the diaphragm to reduce the volume of the other chamber. One chamber has a fuel inlet that allows fuel into the chamber which accommodates expansion of the fuel by increasing the volume of the chamber against the bias of the spring. Preferably, the diaphragm has an over-pressure valve which opens when the system has reached its maximum over-pressure to allow the fuel to flow from one chamber to the other chamber in bypass relation to the injectors. The other chamber has an outlet communicating directly with the fuel tank. In another embodiment, the accumulator has a housing with a flexible diaphragm between first and second chambers in which one chamber has a fuel inlet for communication with the fuel rail and the other chamber continuously communicates with the engine air intake manifold so that the pressure drop across the engine fuel injectors is maintained more constant as the manifold pressure varies.
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