Fuel tank level equalizer system

A fuel delivery system for an internal combustion engine comprising;

• a fuel pump module constructed to be disposed in a fuel container with at least two sections which are separated from each other under at least some fuel level conditions, a first fuel pump disposed in said module having a fuel inlet disposed adjacent the bottom of the fuel container and a fuel outlet for delivering fuel under pressure to the engine, a jet pump communicating completely within the fuel container with the fuel outlet of the first fuel pump and powered by a portion of outlet fuel from said first pump and having an inlet, at least two fuel pickups spaced apart and each disposed in a separate section of the fuel container adjacent the bottom of its associated separate section of the fuel container 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 and the inlet of the jet pump so that when the jet pump is operating the jet pump removes any gas from the siphon to fill the siphon with liquid fuel and initiate action of the siphon to equalize the level of fuel in all of the sections of the fuel container, and an air break disposed above and communicating with the uppermost portion of the siphon to interrupt the siphon action.

A fuel delivery system for an internal combustion engine comprising;

• a first fuel pump with an electric motor disposed in a fuel container with at least two sections which are separated from each other under at least certain fuel level conditions, said first fuel pump having a fuel 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 each disposed in a separate section of the fuel container adjacent the bottom of a separate one of the sections of the fuel container, each pickup 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 connected with the outlets of all of the fuel pickups and having an outlet, a second pump having an inlet communicating with the outlet of the siphon and having a restricted orifice to increase the pressure drop across the inlet of the second pump in response to fluid flow through the orifice for drawing any air and fuel vapor and liquid fuel from the siphon when the second pump is operating, and an air break communicating with the siphon and having an inlet disposed above the siphon which is open for supplying air and fuel vapor from within the container to the siphon when the level of fuel is below the vertically highest portion of the siphon and the second pump is not operating to interrupt the siphon action and closes when the second pump is operating to prevent air and fuel vapor from being supplied to the siphon so that under normal operating conditions the second pump will completely fill the entire siphon and all of the fuel pickups with liquid fuel and while the second pump is operating the siphon will equalize the level of liquid fuel in the sections of the container.

A fuel delivery system for a combustion engine comprising a fuel pump, a liquid fuel container with at least two sections which are separated from each other under at least some liquid fuel level conditions, a fuel inlet disposed adjacent the bottom of the fuel container and connected to the fuel pump, a pump outlet for delivering liquid fuel under pressure to the engine, a vacuum producing device having an inlet, at least two fuel pickups spaced apart and each disposed in a separate section of the fuel container and adjacent the bottom of its associated separate section of the liquid fuel container and each having an inlet for liquid fuel at a lower portion of its associated separate one section of the liquid fuel container, and a siphon communicating with all the fuel pickups and the inlet of the vacuum producing device 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 substantially equalize the level of fuel in all the sections of the fuel container and an air break disposed above the uppermost portion of the siphon and communicating with the vacuum device so that when the vacuum device is not operating, air enters the inlet of the vacuum device to interrupt the siphon action to prevent any transfer of fuel through the siphon between the separate sections of the fuel container.