Fuel Filter Module Jet Pump Negative Pressure Suction

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Solution Overview

Problem

Existing filter modules installed in fuel pumps struggle to reliably suction fuel from fuel tanks, especially when the fuel is depleted or unevenly distributed, due to insufficient negative pressure, leading to insufficient fuel supply to internal combustion engines during vehicle maneuvers.

Innovation Solution

A filter module configuration that includes a suction filter with a filter screen, a connector, and a jet pump, where the jet pump generates negative pressure to enhance fuel suction by discharging fuel through a nozzle outlet, increasing the overall fuel suction amount into the fuel pump.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a conventional filter module is installed in a fuel pump, then the fuel can be filtered, but the negative pressure is insufficient to reliably suction fuel when the fuel is depleted or unevenly distributed in the tank

Engineering Contradiction:
Improvefuel supply reliabilityVSAvoidnegative pressure
Core Design Contradiction:
ReliabilityVSStress or pressure

Solution Approach 1:

The suction filter is divided into multiple filter screens arranged at different positions (first filter screen at the bottom, second filter screen at the side wall). This segmentation allows the system to draw fuel from multiple locations simultaneously, increasing the effective suction area and enhancing negative pressure distribution, thereby improving fuel supply reliability when fuel is depleted or unevenly distributed.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The filter module transitions from a single-point suction configuration to a multi-dimensional suction architecture. The first filter screen is positioned at the bottom surface while the second filter screen is positioned at the side wall, creating a three-dimensional fuel intake pattern. This dimensional expansion allows the pump to access fuel from both vertical and horizontal directions, significantly improving suction capability when fuel levels are low or unevenly distributed.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

2Productivity

If the fuel pump operates with insufficient negative pressure, then the structure remains simple, but the fuel suction amount becomes insufficient during vehicle maneuvers

Engineering Contradiction:
Improvefuel suction amountVSAvoidfilter module structure
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

The suction filter incorporates multiple filter screens (first and second filter screens) positioned at different locations, dividing the fuel suction function across multiple elements. This segmentation increases the total fuel suction area and enhances the fuel suction amount during vehicle maneuvers without requiring a complete redesign of the pump mechanism, thus improving productivity with moderate structural complexity.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The filter module serves multiple functions: it filters fuel particles, generates enhanced negative pressure, and provides multi-directional fuel suction capability. By integrating these functions into a single modular unit, the design achieves high fuel suction amount during vehicle maneuvers while maintaining relatively simple overall structure through functional integration.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The enhanced filter module ensures a reliable and sufficient fuel supply to the internal combustion engine even when the fuel is depleted or unevenly distributed in the tank, by increasing the negative pressure and improving fuel suction efficiency.

Implementation Method 1

the jet pump generates negative pressure to enhance fuel suction by discharging fuel through a nozzle outlet

Methodology Applied
Scientific EffectNegative pressure generation: Pressure Drop

Implementation Method 2

The jet pump is connected to the connector and is configured to discharge fuel from a nozzle outlet

Methodology Applied
Scientific EffectJet pump effect: Jet

Implementation Method 3

a filter screen that forms a cavity in an inside of the filter screen and is configured to pass the fuel and air through the filter screen

Methodology Applied
Scientific EffectFiltration: Filter (physical)

Data Source

PatentUS10690096B2Filter module and fuel pump module utilizing same
Publication Date: 2020.06.23 AISAN IND CO LTD
  • US10690096B2 patent drawing
  • US10690096B2 patent drawing
  • US10690096B2 patent drawing

AI summary

A suction filter includes a filter screen and a filter opening portion while the filter opening portion communicates between a cavity and an outside of the filter screen. A connector includes: a connector main body, which is shaped into a tubular form; a connector inlet, which is connected to the filter opening portion; a connector outlet, which is connected to a suction inlet of a fuel pump; and a connector opening portion, which communicates between an inside and an outside of the connector main body. A jet pump includes: a jet pump main body, which is shaped into a tubular form; a jet pump inlet, which is connected to the connector opening portion; a jet pump outlet, which is formed at the other end of the jet pump main body; and a jet nozzle, which discharges the fuel from a nozzle outlet toward the jet pump outlet.