Fuel Tank Mounting Structure for Deformation Prevention
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Solution Overview
Problem
Existing fuel tank mounting structures fail to effectively prevent deformation of fuel tanks due to changes in atmospheric pressure, particularly in resin-made tanks, which can lead to damage and impairment of the fuel tank's function.
Innovation Solution
A structure comprising a band lower and band upper secured to the vehicle body, with connecting means that link the fuel tank's walls to these bands, preventing deformation by absorbing thermal expansion and contraction differences, and using recesses and insert molded components for enhanced strength and ease of assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the fuel tank is made of resin to reduce weight and prevent rust, then the weight is reduced and rust resistance is improved, but the strength against penetration and breakage deteriorates and deformation resistance worsens
Solution Approach 1:
The patent employs composite material construction by integrating a resin fuel tank with metal reinforcing ribs and mounting bands. The resin tank provides corrosion resistance and weight reduction, while the metal ribs and bands supply structural strength and deformation resistance, creating a hybrid composite structure that combines the advantages of both materials.
Solution Approach 2:
The patent applies local quality enhancement by adding metal reinforcing ribs at specific locations on the resin tank where strength is needed, rather than making the entire tank from strong material. This allows the tank to have sufficient local strength for mounting and pressure resistance while maintaining overall light weight and rust resistance.
2Ease of manufacture
If simple mounting structures are used to reduce complexity, then ease of manufacture is improved, but deformation prevention capability deteriorates
Solution Approach 1:
The patent applies segmentation by dividing the mounting structure into separate functional components: reinforcing ribs integrated into the tank body, mounting bands wrapped around the tank, and connection points attached to the vehicle frame. This segmented approach allows each component to be manufactured and positioned independently, simplifying assembly while providing distributed structural support for effective deformation prevention.
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 solution effectively prevents deformation of the fuel tank under both positive and negative pressure conditions, thereby protecting the tank and its integrated components from damage.
Implementation Method 1
absorbing thermal expansion and contraction differences
Implementation Method 2
pressed against the vehicle body via a rubber cushion
Implementation Method 3
using recesses and insert molded components for enhanced strength and ease of assembly
Data Source
AI summary
To provide a structure for mounting a fuel tank on a vehicle body that can prevent harmful deformation of the fuel tank that would impair the function of the fuel tank in either case where the pressure in the fuel tank changes to a positive pressure or to a negative pressure, the structure for mounting a fuel tank on a vehicle body includes: a band lower (10L) secured to the vehicle body, extending along at least a lower wall (19L) of the fuel tank (1) and holding the fuel tank (1); a lower wall connecting means (40) that connects at least one part of the lower wall (19L) of the fuel tank (1) to the band lower (10L); a holding member (50) secured to the vehicle body and holding the fuel tank (1); and an upper wall connecting means (40) that connects at least one part of the upper wall (19U) of the fuel tank (1) to the holding member.