Angled Baffle Walls Fuel Flow Guidance
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Solution Overview
Problem
Existing baffle arrangements in fuel tanks for mobile machines, such as midsize wheel loaders, are costly to manufacture due to complex tooling requirements and do not provide sufficient fuel flow to the engine, leading to potential stalling issues.
Innovation Solution
A baffle system comprising first and second baffle walls with specific angled portions forming a partially-closed volume to guide fuel towards the draw tube, allowing for efficient fuel retention and flow, which can be easily manufactured using simple forming operations like blanking and bending of sheet metal stock.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If baffle walls with varying radii are used to guide fuel flow, then fuel flow guidance is improved, but manufacturing complexity and cost increase due to specialized tooling requirements
Solution Approach 1:
The patent changes the geometric parameters of the baffle walls from varying radii to straight segments with specific angles (120-150 degrees), maintaining fuel flow guidance functionality while enabling simple manufacturing through standard blanking and bending operations
Solution Approach 2:
The patent replaces expensive, complex tooling required for curved baffle walls with simple, inexpensive dies for straight-segment baffles, significantly reducing manufacturing cost while achieving the same functional result
2Reliability
If baffle walls with many bends are used to guide fuel, then fuel flow direction is improved, but manufacturing complexity increases
Solution Approach 1:
The baffle walls are segmented into distinct straight portions (inner, intermediate, outer) with specific angular relationships, creating a modular structure that achieves complex flow guidance through simple geometric segments rather than continuous curved surfaces
Solution Approach 2:
Instead of using multiple small bends to guide fuel, the patent uses fewer, larger-angle bends (120-150 degrees) that achieve the same flow direction control with simpler geometry, inverting the conventional approach of many small adjustments
3Volume of moving object
If narrow passages are formed between baffle walls, then structural compactness is improved, but fuel volume flow is reduced leading to potential engine stalling
Solution Approach 1:
The patent changes the passage geometry from narrow cross-sections to wider passages created by the angled baffle segments, increasing the cross-sectional area available for fuel flow while maintaining compact overall structure through the specific 120-150 degree angular configuration
Data Source
AI summary
A baffle system for guiding fuel stored within a fuel tank is disclosed. The baffle system may include first and second baffle walls. Each of the first and second baffle walls may be formed from inner, intermediate, and outer portions. Each inner portion may extend from the respective intermediate portion. Each outer portion may extend from the respective intermediate portion, with an angle at a junction of the outer and intermediate portions being between approximately 120 degrees and 150 degrees. The first and second baffles walls may form a partially-closed volume with the first and second inner and intermediate portions, where the partially-closed volume may be configured to retain fuel guided into the volume by the first and second outer portions.