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.

An internal combustion engine that includes a first fuel pump that sucks fuel through a fuel filter, and a second fuel pump that supplies the fuel to a fuel injection device. The internal combustion engine comprises: a first fuel pipe that interconnects the fuel filter, the first fuel pump, and the second fuel pump set to have a pressure higher than a pressure of the first fuel pump; and a second fuel pipe that connects the second fuel pump to the fuel injection device that injects fuel into a combustion chamber formed in a cylinder portion of the internal combustion engine, a shielding wall covering an outside of the cylinder portion is provided between at least a part of the second fuel pipe and the cylinder portion, and the shielding wall includes a holding portion that holds at least the first fuel pipe and the second fuel pipe.

In at least some implementations, a fuel pump assembly includes a first fuel pump and a second fuel pump that each have an electric motor, a pumping element driven by the motor, an inlet and an outlet through which fuel is discharged. The assembly also includes a passage communicated with the outlet of the first fuel pump and with the outlet of the second fuel pump, a fuel outlet in communication with the passage and through which fuel exits the fuel pump assembly, and a valve having an inlet in communication with the passage between the outlet of the first fuel pump and the outlet of the second fuel pump. The valve also having an outlet through which fuel exits the passage and a valve body that controls fuel flow through the valve.

In at least some implementations, a fuel pump assembly includes a first fuel pump and a second fuel pump that each have an electric motor, a pumping element driven by the motor, an inlet and an outlet through which fuel is discharged. The assembly also includes a passage communicated with the outlet of the first fuel pump and with the outlet of the second fuel pump, a fuel outlet in communication with the passage and through which fuel exits the fuel pump assembly, and a valve having an inlet in communication with the passage between the outlet of the first fuel pump and the outlet of the second fuel pump. The valve also having an outlet through which fuel exits the passage and a valve body that controls fuel flow through the valve.

An internal combustion engine that includes a first fuel pump that sucks fuel through a fuel filter, and a second fuel pump that supplies the fuel to a fuel injection device. The internal combustion engine comprises: a first fuel pipe that interconnects the fuel filter, the first fuel pump, and the second fuel pump set to have a pressure higher than a pressure of the first pump; and a second fuel pipe that connects the second fuel pump to the fuel injection device that injects fuel into a combustion chamber formed in a cylinder portion of the internal combustion engine, a shielding wall covering an outside of the cylinder portion is provided between at least a part of the second fuel pipe and the cylinder portion, and the shielding wall includes a holding portion that holds at least the first fuel pipe and the second fuel pipe.

A fuel module for pumping and filtration of a fuel in a fuel system includes a flow housing, and each of an electrically powered pump, a first cartridge filter, and a second cartridge filter in sealed, direct engagement with the flow housing. The fuel module is applied in a low pressure fuel circuit feeding fuel to a high pressure fuel circuit for pressurization to an injection pressure. Electronic closed loop control techniques for the pump are also disclosed.

A fuel module for pumping and filtration of a fuel in a fuel system includes a flow housing, and each of an electrically powered pump, a first cartridge filter, and a second cartridge filter in sealed, direct engagement with the flow housing. The fuel module is applied in a low pressure fuel circuit feeding fuel to a high pressure fuel circuit for pressurization to an injection pressure. Electronic closed loop control techniques for the pump are also disclosed.

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 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 fuel module for pumping and filtration of a fuel in a fuel system includes a flow housing, and each of an electrically powered pump, a first cartridge filter, and a second cartridge filter in sealed, direct engagement with the flow housing. The fuel module is applied in a low pressure fuel circuit feeding fuel to a high pressure fuel circuit for pressurization to an injection pressure. Electronic closed loop control techniques for the pump are also disclosed.