Fuel supply device, particularly for an internal combustion engine

摘要

A fuel supply device (1), particularly for an internal combustion engine (6), is equipped with a particulate filter and a water trap. In order to improve the separation effect, while simultaneously reducing the separation material that is required, it is proposed to configure the water trap (5, 8, 30) as a separate component connected downstream of the fuel filer (4) and to provide it with a first separation stage made of coalescent material and a second separation stage made of hydrophobic material, and to dispose the separation stages such that between them the fuel is diverted.

主权项

1. A fuel supply device (1) for an internal combustion engine (6), comprising;
a particulate filter and a water separator, wherein the water separator (5, 8, 30) is embodied as a separate component downstream of the particulate filter (4) and comprises
a first separating stage (A1) with hydrophilic coalescent material as well asa second separating stage (A2) with hydrophobic material and wherein the separating stages (A1, A2) are arranged such that between them a diversion of the fuel is realized; wherein the water separator (8) comprises a substantially cylindrical housing (9) whose longitudinal axis (L1) is at least approximately vertical; and wherein arranged in the housing (9) an insertion element (10) is provided that comprises a vertical tube section (15); wherein an interior of the tube section (15) defines a fuel outlet passage; wherein the tube section (15) has an axial upper end which leads fuel to a fuel outlet: wherein fuel flows axially within the interior of the tube section (15) in a direction from an axially opposing lower end of the tube section (15) to the axial upper end; wherein a plate-shaped guiding element (18) is arranged on and secured onto the axially opposing lower end of the tube section (15), the plate-shaped guiding element (18) closing off the interior of the tube section at the axially opposing lower end of the tube section (15), the plate-shaped guiding element (18) extending radially outwardly away from the radial outer surface of the tube section (15) and beyond the hydrophobic material to form a radially outwardly extending guide surface on which separated water is guided radially outwardly to an annular gap (26) surrounding the plate-shaped guiding element (18).