Modular Plastic Motorcycle Fuel Tank With Paintable Outer Segments

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Solution Overview

Problem

Existing fuel tanks for motorcycles are heavy and expensive due to the use of metal, and existing plastic tanks either require complex painting processes or lack high-quality surface finishes.

Innovation Solution

A modular plastic fuel tank design with individual segments, where visible segments are painted and concealed segments remain unpainted, combined with a detachable paintable top layer, such as metal or molded plastic, allowing for easy customization and repair.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If conventional plastic containers are used, then manufacturing cost is low and production is simple, but they do not nest well during shipping and stacking is inefficient

Engineering Contradiction:
Improvemanufacturing simplicityVSAvoidshipping efficiency
Core Design Contradiction:
Ease of manufactureVSProductivity

Solution Approach 1:

The container is designed with nested portions that allow one container to be placed inside another, enabling efficient nesting during shipping. The nested portion includes a wall extending downward and a bottom portion that receives the nested container, creating a space-saving configuration for transportation and storage.

Inventive Principle:
Principle #7Nested doll (Nesting)

Solution Approach 2:

The container is divided into distinct functional portions including nested portions, stacking portions, and venting portions. This segmentation allows each portion to perform its specific function optimally while maintaining overall manufacturing simplicity through modular design.

Inventive Principle:
Principle #1Segmentation

2Loss of substance

If conventional plastic containers are used, then material usage is minimal and production is simple, but stacking efficiency is poor and storage space is wasted

Engineering Contradiction:
Improvematerial usageVSAvoidstacking efficiency
Core Design Contradiction:
Loss of substanceVSProductivity

Solution Approach 1:

The container features asymmetric design elements including a first stacking portion with a first configuration and a second stacking portion with a second configuration. This asymmetry enables interlocking stacking patterns that maximize storage space utilization while maintaining material efficiency.

Inventive Principle:
Principle #4Asymmetry

Solution Approach 2:

The nested portions enable containers to be stored within each other when not in use, dramatically improving storage space efficiency without requiring additional materials or complex structures.

Inventive Principle:
Principle #7Nested doll (Nesting)

3Ease of manufacture

If conventional plastic containers are used, then manufacturing is simple and cost-effective, but they allow unwanted insects to enter and contaminate stored produce

Engineering Contradiction:
Improvemanufacturing simplicityVSAvoidproduce protection
Core Design Contradiction:
Ease of manufactureVSReliability

Solution Approach 1:

The container incorporates localized venting portions with specific aperture configurations that provide insect protection at critical entry points while maintaining overall manufacturing simplicity. The venting portions include apertures sized to prevent insect entry while allowing air flow for produce respiration.

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The venting portions act as intermediary structures that mediate between the need for air flow and the need for insect protection. The apertures in the venting portions allow controlled air exchange while serving as a physical barrier against insects.

Inventive Principle:
Principle #24Intermediary (Mediator)

4Ease of manufacture

If conventional plastic containers are used, then production is simple and cost is low, but air flow is insufficient and produce cannot respire properly

Engineering Contradiction:
Improveproduction simplicityVSAvoidproduce respiration support
Core Design Contradiction:
Ease of manufactureVSAdaptability or versatility

Solution Approach 1:

The container features localized venting portions strategically positioned to provide adequate air flow for produce respiration. These venting portions include apertures with specific sizing and distribution patterns that optimize air exchange while maintaining production simplicity.

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The venting portions serve multiple functions simultaneously: they provide air flow for respiration, prevent insect entry, and maintain structural integrity. This multi-functionality achieves adaptability for produce protection without increasing production complexity.

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

Data Source

PatentEP3746326B1Fuel tank for a motorcycle
Publication Date: 2026.04.22 BAYERISCHE MOTOREN WERKE AG
  • EP3746326B1 patent drawingFigure 1
  • EP3746326B1 patent drawingFigure 2
  • EP3746326B1 patent drawingFigure 3a~3c

AI summary

The invention relates to a modular plastic container (10), which comprises at least two plastic segments (12) that are connected to one another by way of plastic welding, the exterior of at least one of the plastic segments (12) having a paintable cover layer (16) or consisting of a paintable material.