A fuel supply device of an engine includes a primary pump suctioning fuel to discharge the fuel to a first pipeline, a secondary pump connected in series to the primary pump via the first pipeline, and suctioning the fuel from the primary pump to supply the fuel through a second pipeline to an engine side, a tank storing the fuel and accommodating the secondary pump, an outflow part causing part of the fuel flowing from the first pipeline through the secondary pump to the second pipeline in the tank to flow outward, a third pipeline returning, to a suction side of the primary pump, gas-liquid mixed fuel generated by vaporizing the fuel flowing out from the outflow part, and a preloading part in one of portions of a circulation path formed between the primary pump and the tank by the first pipeline and the third pipeline and preloading the fuel.

A sender gauge adaptor includes an adaptor body pressed against a bottom wall of a fuel tank by a spring. The adaptor body includes a suction inlet part having a hollow cylindrical shape that opens downward. Recesses allowing fluid communication between the interior and the exterior of the suction inlet part and projection parts having a polygonal-shaped lower surfaces are alternately arranged in the circumferential direction along a lower end of the suction opening. The adaptor body includes a seat part in surface contact with the bottom wall of the fuel tank at a position below the lower surfaces of the projection parts.

The present disclosure is related to a method and an assembly for delivering fuel in a fuel tank (10), wherein the fuel tank comprises at least a first chamber (12) having a module pot (18) disposed therein and at least a first pump (30) adapted to deliver fuel from the first chamber to the module pot, and wherein a fuel pump (20) for delivering fuel to an engine is disposed within the module pot. In order to minimize the duty cycle of the pumps and therefore the energy consumption, it is proposed according to the present disclosure that a sensor device (22) is used to detect a predetermined minimum fill level in the module pot, wherein the pump disposed in the first chamber is activated when the minimum fill level is reached and is deactivated after a predetermined time interval or when a predetermined higher fill level in the module pot is reached.

A sender gauge adaptor includes an adaptor body pressed against a bottom wall of a fuel tank by a spring. The adaptor body includes a suction inlet part having a hollow cylindrical shape that opens downward. Recesses allowing fluid communication between the interior and the exterior of the suction inlet part and projection parts having a polygonal-shaped lower surfaces are alternately arranged in the circumferential direction along a lower end of the suction opening. The adaptor body includes a seat part in surface contact with the bottom wall of the fuel tank at a position below the lower surfaces of the projection parts.

In at least some implementations, an assembly includes a reservoir, a primary fuel pump having an inlet in communication with the reservoir's internal volume, an outlet, a motor and a pumping element driven by the motor and a secondary fuel pump with a body having first and second inlets and an outlet. The first inlet receives fuel from the primary fuel pump and a nozzle is communicated with the first inlet and fuel flows out of the nozzle into the body via the first inlet. The second inlet is in communication with the reservoir inlet, and the outlet is in communication with the internal volume. The flow of fuel through the nozzle draws fuel from the fuel source through the second fuel inlet and that fuel is combined with the flow of fuel from the nozzle and discharged into the reservoir.

The fuel filling system of a fuel pump reservoir includes: a reservoir mounted in a fuel tank; a fuel pump mounted in the reservoir and configured to deliver the fuel in the reservoir to an engine and to discharge a portion of the fuel to a fuel branch line; a relief valve disposed on a fuel supply line and configured to release pressure applied to the fuel supply line; a first jet pump configured to fill the reservoir with the fuel using fuel jet flow from the fuel branch line; a second jet pump configured to fill the reservoir with the fuel using fuel jet flow from a fuel return line; and a fuel pump control module (FPCM) configured to control operation of the second jet pump based on a driving mode of a vehicle.

Techniques for managing a fuel for a power generator include storing a volume of a fuel in a primary fuel storage tank that includes an inlet and an outlet; generating electrical power with a solar power assembly; operating a pump assembly with the generated electrical power to circulate a flow of the fuel from the primary fuel storage tank to a fuel filter; removing at least a portion of contaminants from the flow of the fuel; circulating the flow of the fuel to a fuel quality sensor; measuring a quality value of the flow of the fuel; and based on a signal from the fuel quality sensor associated with the quality value of the flow of the fuel, operating a control valve to direct the flow of the fuel from the fuel quality sensor to the primary fuel storage tank from the control valve or an auxiliary fuel storage tank from the control valve.

In at least some implementations, a jet pump includes a main body having a first inlet, an inlet passage communicated with the inlet, a second inlet, an intake passage communicated with the second inlet, an outlet, and an outlet passage communicated with the outlet and with the intake passage, a jet carried by the main body and having a jet inlet communicated with the inlet passage so that fluid flowing in the inlet passage flows through the jet inlet, and a jet outlet having a flow area less than the jet inlet and less than the inlet passage. The main body is formed in one piece and the jet is a separate piece of material that is inserted into the inlet passage after the main body has been formed.

A fuel system for a vehicle comprising a fuel tank having a fuel tank reservoir. A lift pump is outside of the fuel tank and includes an inlet, and first and second outlets, with the inlet being configured to receive fuel from the fuel tank. The lift pump is configured to output fluid from the first outlet at a first prescribed pressure. A venturi pump is located within the fuel reservoir and defines a venturi pump reservoir. The venturi pump includes a venturi jet including a drive inlet configured to be fluidly connectable to the first outlet of the lift pump to receive fluid therefrom. A suction inlet is configured to be placeable in fluid communication with the fuel tank reservoir and to draw fluid from the fuel tank reservoir into the venturi pump reservoir in response to fluid flowing through the venturi jet at the first prescribed pressure.

A jet pump for a system for supplying fluid to a turbomachine. The jet pump includes an active fluid inlet pipe including a tube delimiting the inlet pipe, and a passive fluid inlet pipe that is fluidically separated from the active fluid inlet pipe by the tube. The active fluid inlet pipe includes at least one twisted blade that is positioned within the tube and is configured to make the active fluid rotate with respect to the axis of the tube.