# US 5,341,842 A · Bottom mount fuel tank module for an automobile

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- Number: US 5,341,842 A
- Document ID: US5341842A
- Status: Granted
- Kind: A
- Application number: 08/089,200
- Filed: 1993-07-12
- Granted: 1994-08-30
- Earliest claimed: 1993-07-12
- Assignees: Ford Motor Company
- Inventors: Ming-Niu Chih; Michael H. Johnston
- Web page: https://patentgrep.com/patent/US5341842A

## CPC

- F02M 37/106: {the pump being installed in a sub-tank}
- F02M 37/025: {Feeding by means of a liquid fuel-driven jet pump (jet pumps per se F04F)}
- Y10T 137/86212: Plural compartments formed by baffles
- Y10T 137/86228: With communicating opening in common walls of tanks or compartments
- F02M: SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A module which fits into a cup attached to the bottom of an automotive fuel tank contains a fuel pump, a fuel filter, a jet pump and associated manifold components for maintaining a minimum level of fuel in a reservoir to provide a continuous source of fuel to the fuel pump when the tank fuel level is low or when vehicle operations, such as cornering, braking, acceleration, or slope parking cause the tank fuel level to fall below the fuel pump inlet.

## Claims

### Claim 1

A fuel delivery module for supplying fuel to an automobile engine from a fuel tank comprising:
a reservoir;
a reservoir cap attachably enclosing said reservoir and having spaces to allow fuel overage to flow from the reservoir to the tank;
a fuel pump within said reservoir having a fuel pump outlet passing through the cap;
a manifold attached to said cap exteriorly of said reservoir for receiving high pressure fuel flow from the fuel pump outlet, said manifold having an engine fuel delivery conduit for routing a first portion of said high pressure fuel flow to said engine, and a connecting conduit which routes a second portion of said high pressure fuel to conduit means passing through said cap and in fluid communication with a jet pump fuel inlet conduit; and
a jet pump having a fuel intake chamber in communication with said jet pump fuel inlet conduit for receiving the second portion of high pressure fuel and routing said second portion past a venturi opening to draw fuel from the fuel tank into a fuel outlet chamber, through a vertically positioned reservoir outlet conduit within said reservoir, and into said reservoir with said reservoir outlet conduit arranged such that said reservoir outlet conduit is above a fuel inlet to said fuel pump, said reservoir remaining filled to a minimum height of said conduit outlet when said fuel pump and said engine cease operating.

### Claim 2 (depends on 1)

A fuel delivery module according to claim 1, wherein a fuel tank inlet filter is attached to said jet pump opening.

### Claim 3 (depends on 2)

A fuel delivery module according to claim 2, wherein a fuel pump inlet filter is attached to said fuel inlet within said reservoir.

### Claim 4 (depends on 3)

A fuel delivery module according to claim 3, wherein said reservoir has a bottom with a tank side and a reservoir side, said bottom having a flapper valve in communication with said tank.

### Claim 5 (depends on 4)

A fuel delivery module according to claim 4, wherein said reservoir cap has means for attachment to a cup secured to said tank.

### Claim 6 (depends on 5)

A fuel delivery module according to claim 5, wherein means for sensing fuel level in said tank are attached to said reservoir.

### Claim 7 (depends on 1)

A fuel delivery module according to claim 1, wherein said reservoir, said jet pump, said jet pump fuel inlet conduit, and said vertically positioned reservoir outlet conduit comprise a single unitary piece.

### Claim 8 (depends on 1)

A fuel delivery module according to claim 1, wherein said cap has a plurality of clips for attaching said fuel delivery module to a module receiving cup in said fuel tank.

### Claim 9 (depends on 1)

A fuel delivery module according to claim 1, wherein a return line inlet is attached to said cap exteriorly of and in fluid communication with said reservoir for routing fuel returned from the engine to the reservoir.