Jet pump assembly of a fuel system for a combustion engine
AssigneeTI Group Automotive Systems, L.L.C.
InventorPaul Paluszewski
Life of this patent
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Abstract
A fuel system has a jet pump assembly that fills a fuel reservoir for providing a reliable source of fuel to an electric motor fuel pump located in a fuel tank for a combustion engine. The electric fuel pump preferably delivers fuel at a controlled pressure to a series of fuel injectors of the engine. A small portion of the fuel exiting the electric fuel pump is diverted to the jet pump assembly that aspirates fuel from the fuel tank and into the reservoir. A biased normally closed pressure responsive valve prevents fuel flow to the jet pump when the electric fuel pump is running under impaired conditions, thus providing all the fuel to the combustion engine typically during cold engine start conditions.
Claims16
A liquid fuel system for a fuel injected combustion engine comprising:
- a fuel reservoir configured to be disposed in a fuel tank;
- a fuel pump having an inlet disposed in the reservoir and at least one fuel outlet;
- a supply conduit communicating between the outlet and the combustion engine;
- a jet pump assembly for transferring fuel from the fuel tank into the reservoir;
- a supplemental conduit communicating between the fuel outlet and the jet pump assembly;
- and
- a pressure valve interposed in the supplemental conduit and yieldably biased toward a closed position and when closed preventing supplemental fuel flow to the jet pump assembly during impaired fuel pump operation.
Dependencies are inferred from the claim text.