A high-pressure injection device for an internal combustion engine to which engine segment times are assigned, having a high-pressure pump, a rail connected to the high-pressure pump via a high-pressure fuel line, at least one injector, a digital pressure reduction valve connected to the rail, a fuel return line connected to the pressure reduction valve, and a control unit. The control unit is configured to switch the pressure reduction valve into the transmissive state only in predetermined engine segment times, and to maintain said transmissive state of the pressure reduction valve for a time period which is greater than the duration of one engine segment time.

An on-board fuel separation system includes a supply fuel tank configured to store an input fuel stream; a fuel separator fluidly coupled to the supply fuel tank and configured to separate the input fuel stream into a first fractional fuel stream and a second fractional fuel stream. The fuel separator includes a membrane that includes a plurality of pores sized based on a molecular size of one or more components of the first fractional fuel stream. The system includes a first fractional fuel tank fluidly coupled to the fuel separator to receive the first fractional fuel stream passed through the membrane and defined by a first auto-ignition characteristic value. The system includes a second fractional fuel stream coupled to the fuel separator to receive the second fractional fuel stream from the fuel separator that is defined by a second auto-ignition characteristic value that is different than the first auto-ignition characteristic value.

A heater control apparatus for a diesel fuel filter according to an exemplary embodiment of the present disclosure includes a fuel temperature sensor for sensing a temperature of diesel fuel, a main relay including a first internal coil and a first switch, a pre-filter heater relay including a second internal coil and a second switch; a first node, a second node, a third node, and an engine control unit (ECU).

A heater device of a diesel fuel filter may include a heater housing inserted into a diesel fuel filter, and a heater portion inserted into the heater housing. A plurality of flow-path regions may be formed in the heater portion such that heated fuel passes through the heater portion. Accordingly, heat is transmitted directly from a heater portion including a plurality of heat radiating plates and PTC devices, and thus fuel is rapidly heated and a fuel transfer velocity is increased so as to improve engine starting performance at low temperature, thereby improving marketability and convenience.

An integrated fuel water separator filter system is provided. The fuel water separator filter may include a plurality of fuel water separator filters, with at least one fuel water separator filter including electronic sensors to monitor the life of the fuel water separator filter and the amount of water present in the fuel water separator filter. A heater heats the fuel in the fuel water separator filter.

A screen element for a fuel system includes a first screen and a second screen. The first screen defines a first aperture and the second screen defines a second aperture. The first aperture and the second aperture are arranged out of circumferential alignment with one another such that a torturous flow path is defined through the apertures for capturing particles smaller than the apertures in a collection cavity defined between the screens.

The invention relates to a filter unit, a filter system (44b) with at least two filter units, and to a motor vehicle with a filter system (44b). A filter bowl (12d-e) of the filter unit is formed by a base and a cover. Embodied in a side wall of the base are at least two access openings to an antechamber or collection chamber (34a-b) in the filter bowl (12d-e). Embodied integrally with the cover is a collection line segment or supply segment (26d-e) that leads from a clean chamber or an unfiltered side antechamber in the filter bowl (12d-e) to at least two open ends (28l). The inventive filter system (44b) has at least two inventive filter units, and fluid may flow through their filter elements (30, 30a-d), which are switched in parallel. The invention facilitates the space-saving arrangement of filter units and filter systems (44b) in constricted and/or complexly shaped installation spaces, especially in motor vehicles.

A filter assembly for a fluid to be filtered, in particular fuel or oil, has a filter housing having a housing lower part that is configured as a single piece and has at least one fluid inlet for the fluid to be filtered and a plurality of filter pots that are arranged next to one another side by side in a shared plane and are fluidically connected to one another via side wall passages An upper housing part closes the filter pots and has a fluid manifold that has at least one fluid outlet for the filtered fluid flowing out from the filter pots. At least two filter elements, one being arranged in each of the filter pots of the filter housing. The filter assembly is a more inexpensively-manufactured and as configured for installation even in confined installation spaces, so as to accommodate a sufficiently large filter surface for a predetermined volume flow of a fluid to be filtered.

A fuel filter used with a supply of liquid fuel and with an engine has a housing formed with a filter chamber, with inlet and outlet ports respective connected to the supply and to the engine and opening into the chamber, and with a throughgoing return passage juxtaposed with the filter chamber and extending between a return-fuel inlet connected to the engine and a return-fuel outlet connected to the tank. A filter element is in the chamber between the inlet and outlet ports. Fuel moves in a circuit from the supply to the inlet port, thence through the filter element in the chamber, thence out the outlet port to the engine where a portion of the fuel is consumed and a portion of it is heated and flowed back to the return-fuel inlet, and thence through the passage and out the return-fuel outlet to the supply.

A fuel separation system includes a fuel separator configured to receive a fuel stream and separate the fuel stream, based on a volatility of the fuel stream, into a vapor stream defined by a first auto-ignition characteristic value and a first liquid stream defined by a second auto-ignition characteristic value, the second auto-ignition characteristic value greater than the first auto-ignition characteristic value; and a control system communicably coupled to the fuel separator and operable to receive an input from an engine, the input including an engine operating condition, the control system configured to adjust an operating parameter of the fuel separator, based at least in part on the engine operating condition, to vary at least one of the first or second auto-ignition characteristic values.