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A fuel delivery system for vehicles with more than one fuel tank or a single tank with separate sections under at least some fuel level conditions. The system has an electric fuel pump disposed in the fuel container and a jet pump connected to the electric fuel pump with fuel pickups connected to th

A fuel delivery system for vehicles with more than one fuel tank or a single tank with separate sections under at least some fuel level conditions. The system has an electric fuel pump disposed in the fuel container and a jet pump connected to the electric fuel pump with fuel pickups connected to the jet pump through a siphon. The electric fuel pump powers the jet pump to fill the siphon with liquid fuel and draw fuel through the pickups which are spaced apart in separate sections of the fuel container. When the siphon is completely filled with liquid fuel and the jet pump is operating, any difference in the heads or fuel levels in the sections of the fuel container will cause fuel to flow through the siphon from the section with the greater head to the other section of the tank. This flow, due to the difference in pressure associated with different fuel levels, continues until the fuel levels and, hence, the pressures are substantially the same in each section of the container. Therefore, a single fuel level sensor can be used to monitor the total amount of fuel remaining in the tank or tanks. An air break interrupts the operation of the siphon when the jet pump is not operating to maintain the same fuel level in the sections or tanks even though the vehicle and hence the container or tanks are inclined when the vehicle and pumps are not operating.

대표청구항 ▼

[ We claim:] [1.] A fuel delivery system for an internal combustion engine comprising; a fuel pump driven by an electric motor and constructed to be disposed in a liquid fuel container with at least two sections which are separated from each other under at least some fuel level conditions, said fuel

[ We claim:] [1.] A fuel delivery system for an internal combustion engine comprising; a fuel pump driven by an electric motor and constructed to be disposed in a liquid fuel container with at least two sections which are separated from each other under at least some fuel level conditions, said fuel pump having a pump inlet disposed adjacent the bottom of the fuel container and a pump outlet for delivering fuel under pressure to the engine, at least two fuel pickups spaced apart and disposed adjacent the bottom of said fuel container each in a separate section and each having an inlet at a lower portion of its associated separate section of the fuel container, an outlet and a valve member which permits liquid fuel to flow through the inlet when the inlet is immersed in liquid fuel and prevents gaseous flow through the inlet in the absence of liquid fuel at the inlet, a siphon communicating and connected with the outlets of all of the pickups, a vacuum producing device having an inlet communicating with the siphon so that when operating the vacuum device removes any gas from the siphon to fill the siphon with liquid fuel and initiate action of the siphon to tend to equalize the level of fuel in all the sections of the fuel container, and an air break disposed above and communicating with the uppermost portion of the siphon to provide air to the siphon when the vacuum device is not operating and the fuel level in the fuel container is below said uppermost portion of the siphon to interrupt the siphon action.