Dual-Filter Fuel Supply Device for Vapor Discharge and Particulate Removal
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Solution Overview
Problem
Existing fuel injection systems for saddle type vehicles face challenges in simultaneously improving vapor discharge and foreign particulate removal, which affects engine startup performance during high-temperature restarts.
Innovation Solution
A dual-filter system is implemented, where a filter with larger gap density is positioned above to efficiently discharge vapor and a filter with smaller gap density is positioned below to effectively filter foreign particulates, both located within the fuel tank to enhance vapor discharge and particulate removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the density of gaps in the filter is increased to improve vapor discharge, then the ability to remove foreign particulates deteriorates
Solution Approach 1:
The filter is divided into two distinct filter portions: a first filter portion with smaller gap density for removing foreign particulates, and a second filter portion with larger gap density for discharging vapor. This segmentation allows each portion to specialize in its respective function without compromise.
Solution Approach 2:
Different regions of the filter are assigned different gap densities according to their specific functional requirements. The lower portion has smaller gaps optimized for particulate filtration, while the upper portion has larger gaps optimized for vapor discharge, matching local quality to local function.
2Productivity
If a single filter structure is used, then it is difficult to simultaneously optimize both vapor discharge and particulate removal
Solution Approach 1:
The filter is segmented into two functional portions with different gap densities, enabling simultaneous optimization of vapor discharge and particulate removal capabilities within a single integrated filter assembly.
Solution Approach 2:
The single filter assembly performs multiple functions: the first filter portion removes foreign particulates while the second filter portion discharges vapor. This multi-functionality achieves comprehensive fuel supply optimization without requiring separate systems.
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
This configuration improves engine startup performance at high-temperature restarts by efficiently discharging vapor and filtering particulates, thereby addressing the limitations of previous designs.
Implementation Method 1
the vapor rises within the fuel, the vapor will be easily discharged from the second filter portion, which is located above the first filter portion
Data Source
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AI summary
A fuel supply device (30) is provided with a fuel pump (34) and a filter (35). The fuel pump (34) supplies fuel from a fuel tank (5) to an engine (3). The filter (35) is provided further upstream from the fuel pump (34) in a fuel supply channel. The filter (35) includes a first filter portion (44) and a second filter portion (45). The first filter portion (44) and the second filter portion (45) filter the fuel. The second filter portion (45) is located above the first filter portion (44) with the filter (35) placed inside the fuel tank (5). A density of gaps in the second fuel filter portion (45) is larger than a density of gaps in the first filter portion(44).