US 11,396,856 B2Granted

Fuel supply device

AssigneeAisan Kogyo Kabushiki Kaisha

InventorsShinya Higashi, Koji Yoshida, Satoshi Nakamura, Masashi Go

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Abstract

A fuel supply device includes a fuel pump, a sub-tank configured to store a fuel, a leakage passage configured to return a part of a pressurized fuel discharged from the fuel pump into the sub-tank, and a fuel filter disposed at a bottom part of the sub-tank. The fuel filter includes a filter member that is configured to filter the fuel to be suctioned into the fuel pump. A downstream end of the leakage passage includes a linear passage part linearly extending from a position above the filter member toward the filter member. The fuel supply device also includes a direction change wall part configured to change the flow direction of the pressurized fuel jetted from the linear passage part so as to prevent the pressurized fuel from directly impacting the filter member.

Claims15

Dependent claims

A fuel supply device for supplying a fuel in a fuel tank to an engine, the fuel supply device comprising:

a fuel pump;
a sub-tank coupled to the fuel pump and configured to store the fuel;
a pressurized fuel return passage in fluid communication with an outlet of the fuel pump, wherein the pressurized fuel return passage is configured to flow a part of a pressurized fuel discharged from the fuel pump into the sub-tank;
a fuel filter disposed at a bottom part of the sub-tank and including a filter member having a bag-like shape and configured to filter the fuel suctioned into the fuel pump, wherein a downstream end of the pressurized fuel return passage includes a linear passage part extending linearly toward the filter member along a central axis to a downstream end that is spaced from the filter member;
and
a wall member positioned between the linear passage part of the pressurized fuel return passage and the filter member such that the linear passage part extends linearly toward the wall member, wherein the wall member extends radially at the downstream end of the linear passage part with respect to the central axis.

3 more elements

A fuel supply device for supplying a fuel in a fuel tank to an engine, fuel supply device comprising:

a fuel pump;
a sub-tank coupled to the fuel pump and configured to store the fuel;
a pressurized fuel return passage in fluid communication with an outlet of the fuel pump, wherein the pressurized fuel return passage is configured to flow a part of a pressurized fuel discharged from the fuel pump into the sub-tank;
a fuel filter disposed at a bottom part of the sub-tank and including a filter member having a bag-like shape, wherein the filter member is configured to filter the fuel suctioned into the fuel pump;
a leading passage forming member defining the pressurized fuel return passage;
a pressure regulator attached to the leading passage forming member and configured to control a pressure of the pressurized fuel and configured to discharge an excess portion of the pressurized fuel;
and
a retaining member attached to a downstream end of the leading passage forming member and configured to hold the pressure regulator at the downstream end of the leading passage forming member, wherein:
the retaining member includes a wall member positioned between an outlet of the pressure regulator and the filter member such that the excess portion of the pressurized fuel is discharged from the outlet of the pressure regulator toward the wall member;
and
the retaining member includes a pressurized fuel jet port disposed downstream of the wall member and configured to jet the pressurized fuel into the sub-tank.

8 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/285,580Filed 1 Oct 2019
Priority: JP JP2018-19422015 Oct 2018
Published: US 2021/0396196 A123 Dec 2021
Granted: 26 Jul 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

F02M 37/0052
Layout or arrangement of systems for feeding fuel: details on the fuel return circuit; Arrangement of pressure regulators
F02M 37/10
Electrically driven: submerged in fuel, e.g. in reservoir
F02M 37/106
Submerged in fuel, e.g. in reservoir: the pump being installed in a sub-tank
F02M 37/44
Characterised by filters or filter arrangements: filters structurally associated with pumps