The invention relates to a fuel supply device for supplying fuel to a first injection device of an internal combustion engine, in particular of a motor vehicle, having at least one first low-pressure port, via which the fuel can be fed to the high-pressure fuel pump from a low-pressure fuel pump, having at least one second low-pressure port for conducting the fuel conveyed by means of the low-pressure fuel pump and fed to the high-pressure fuel pump away from the high-pressure fuel pump to a second injection device provided in addition to the first injection device, having a pump housing as first structural element, and having a second structural element, which is formed separately from the pump housing and which is held on the pump housing, wherein both low-pressure ports are arranged on one of the structural elements.

The invention relates to a fuel supply device for supplying fuel to a first injection device of an internal combustion engine, in particular of a motor vehicle, having at least one first low-pressure port, via which the fuel can be fed to the high-pressure fuel pump from a low-pressure fuel pump, having at least one second low-pressure port for conducting the fuel conveyed by means of the low-pressure fuel pump and fed to the high-pressure fuel pump away from the high-pressure fuel pump to a second injection device provided in addition to the first injection device, having a pump housing as first structural element, and having a second structural element, which is formed separately from the pump housing and which is held on the pump housing, wherein both low-pressure ports are arranged on one of the structural elements.

A fuel delivery system includes a fuel pump assembly, an extension tube, and an injection nozzle assembly. The fuel pump assembly includes a pumping chamber, an inlet valve configured to direct fuel to the pumping chamber, a piston configured to pressurize fuel in the pumping chamber, an electromagnetic actuator operatively coupled to the piston, and an outlet check valve configured to direct pressurized fuel out of the pumping chamber. The electromagnetic actuator is configured to produce a force sufficient to move the piston to pressurize fuel in the pumping chamber and direct pressurized fuel through the outlet check valve. The extension tube is located downstream of the outlet check valve, and the injection nozzle assembly is located downstream of the extension tube. The injection nozzle assembly includes a nozzle check valve configured to selectively permit pressurized fuel received from the outlet check valve through the extension tube to exit the fuel delivery system.

A pump device for an internal combustion engine, having a high-pressure fuel pump for supplying fuel to a first injection device, having at least one low-pressure inlet, via which the fuel is fed to the high-pressure fuel pump from a low-pressure fuel pump, having at least one low-pressure outlet for conducting the fuel conveyed by the low-pressure fuel pump and fed via the low-pressure inlet to the high-pressure fuel pump out of the high-pressure fuel pump, and having at least one low-pressure port, for conducting fuel conveyed by the low-pressure fuel pump to a second injection device. At least one mixing region mixes the fuel flowing through the low-pressure outlet with fuel fed to the mixing region from the low-pressure fuel pump upstream of the high-pressure fuel pump. The low-pressure port is fluidically connected to the mixing region, and the low-pressure inlet is supplied with fuel from the mixing region.

A pump device for an internal combustion engine, having a high-pressure fuel pump for supplying fuel to a first injection device, having at least one low-pressure inlet, via which the fuel is fed to the high-pressure fuel pump from a low-pressure fuel pump, having at least one low-pressure outlet for conducting the fuel conveyed by the low-pressure fuel pump and fed via the low-pressure inlet to the high-pressure fuel pump out of the high-pressure fuel pump, and having at least one low-pressure port, for conducting fuel conveyed by the low-pressure fuel pump to a second injection device. At least one mixing region mixes the fuel flowing through the low-pressure outlet with fuel fed to the mixing region from the low-pressure fuel pump upstream of the high-pressure fuel pump. The low-pressure port is fluidically connected to the mixing region, and the low-pressure inlet is supplied with fuel from the mixing region.

Provide is a high-pressure fuel pump capable of improving the degree of freedom of layout of members to be attached to a pump body and a producing method thereof. Therefore, the high-pressure fuel pump includes the suction joint that sucks fuel, the pump body formed with the pressurizing chamber that pressurizes the fuel sucked from the suction joint, and the discharge joint that discharges the fuel pressurized in the pressurizing chamber. The pump body is formed so that at least a part of the side surface portion thereof becomes a cylindrical portion or a polygonal shape portion. At least one of the discharge joint and the suction joint may be fixed on the inner peripheral side with respect to the outermost peripheral portion of the cylindrical portion or the polygonal shape portion of the side surface portion.

A fuel system is provided for supplying pressurized fuel, in particular dimethyl ether (DME) or a blend thereof, to an internal combustion engine. The fuel system includes a fuel pump, which has a pumping mechanism arranged partly in a housing containing lube oil, a drain line connected to the housing and suitable for draining at least fuel vapor from an interior of the housing, a lube oil supply line connected to the housing, a lube oil supply valve installed in the lube oil supply line, a seal installed between the pumping mechanism and the housing for preventing at least lube oil leakage to the outside of the housing, and a drain valve installed in the drain line, wherein both the drain valve and lube oil supply valve are controlled to be closed during an engine non-running state for preventing fuel vapor leakage from the housing.

A fuel system is provided for supplying pressurized fuel, in particular dimethyl ether (DME) or a blend thereof, to an internal combustion engine. The fuel system includes a fuel pump, which has a pumping mechanism arranged partly in a housing containing lube oil, a drain line connected to the housing and suitable for draining at least fuel vapor from an interior of the housing, a lube oil supply line connected to the housing, a lube oil supply valve installed in the lube oil supply line, a seal installed between the pumping mechanism and the housing for preventing at least lube oil leakage to the outside of the housing, and a drain valve installed in the drain line, wherein both the drain valve and lube oil supply valve are controlled to be closed during an engine non-running state for preventing fuel vapor leakage from the housing.

Systems and methods are provided for electric in-tank fuel pumps with configurability for supporting different fuel pressures. An example welding-type system may include an engine that uses liquid fuel to generate mechanical power, a generator configured to convert mechanical power from the engine to electric power for use in driving one or more components of the welding-type system, and a fuel delivery component that supplies the liquid fuel to the engine from a fuel tank. The fuel delivery component may include a fuel pump. The fuel pump may be disposed within the fuel tank. The fuel pump may be configurable to supply the fuel at a plurality of pressure levels that may include, at least, a first pressure level and a second pressure level that is different from the second pressure level.

Systems and methods are provided for electric in-tank fuel pumps with configurability for supporting different fuel pressures. An example welding-type system may include an engine that uses liquid fuel to generate mechanical power, a generator configured to convert mechanical power from the engine to electric power for use in driving one or more components of the welding-type system, and a fuel delivery component that supplies the liquid fuel to the engine from a fuel tank. The fuel delivery component may include a fuel pump. The fuel pump may be disposed within the fuel tank. The fuel pump may be configurable to supply the fuel at a plurality of pressure levels that may include, at least, a first pressure level and a second pressure level that is different from the second pressure level.