Multi-Layer Primer Apparatus for Marine Fuel Systems
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Solution Overview
Problem
Conventional primer apparatuses in marine fuel systems fail to effectively prevent diurnal evaporative emissions, as they allow fuel vapors to permeate due to lack of low permeation materials and lack resilience to temperature fluctuations, leading to deformation and inoperability.
Innovation Solution
A multi-layer primer apparatus with a first layer of low permeation material and a second layer of high strength and resiliency, encapsulating the first layer, which restricts fuel vapor permeation and maintains structural integrity and functionality across varying temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If conventional single-material primer apparatus is used, then structural strength and resiliency are achieved, but fuel vapor permeation increases leading to high diurnal emissions
Solution Approach 1:
The primer apparatus body is constructed with composite materials consisting of a first material layer with low permeation characteristics (such as fluorocarbon, fluoropolymer, nylon, or Acetal) and a second material layer with high strength and resiliency (such as halogenated elastomeric material like ECO or nitrile material). This composite structure reduces fuel vapor permeation while maintaining structural integrity and operational reliability.
2Strength
If high strength material is used to maintain structural integrity, then resistance to deformation is improved, but fuel vapor permeation increases
Solution Approach 1:
The primer apparatus body is constructed with composite materials consisting of a first material layer with low permeation characteristics (such as fluorocarbon, fluoropolymer, nylon, or Acetal) and a second material layer with high strength and resiliency (such as halogenated elastomeric material like ECO or nitrile material). This composite structure reduces fuel vapor permeation while maintaining structural integrity and operational reliability.
3Object-generated harmful factors
If low permeation material is used to reduce emissions, then fuel vapor permeation decreases, but structural strength and resiliency are reduced
Solution Approach 1:
The primer apparatus body is constructed with composite materials consisting of a first material layer with low permeation characteristics (such as fluorocarbon, fluoropolymer, nylon, or Acetal) and a second material layer with high strength and resiliency (such as halogenated elastomeric material like ECO or nitrile material). This composite structure reduces fuel vapor permeation while maintaining structural integrity and operational reliability.
4Ease of manufacture
If conventional primer apparatus is used, then ease of manufacture is maintained, but compliance with environmental regulations is difficult to achieve
Solution Approach 1:
The primer apparatus body is constructed with composite materials consisting of a first material layer with low permeation characteristics (such as fluorocarbon, fluoropolymer, nylon, or Acetal) and a second material layer with high strength and resiliency (such as halogenated elastomeric material like ECO or nitrile material). This composite structure reduces fuel vapor permeation while maintaining structural integrity and operational reliability.
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 multi-layer primer apparatus significantly reduces diurnal emissions to less than 15 g/m2/day and maintains operational resilience, preventing deformation from temperature fluctuations and repeated use, thus complying with environmental regulations.
Implementation Method 1
a first layer composed of a material having low permeation characteristics to substantially prevent diurnal emissions from escaping from the inner chamber and/or through the body of the primer apparatus
Implementation Method 2
a second layer composed of a material having a relatively high strength and/or resiliency to enable the body to return to its original form or shape after a user deflects and releases the body
Implementation Method 3
the third layer may have a relatively high strength and/or resiliency to further enable the body to return to its original form or shape after a user deflects and releases the body
Data Source
AI summary
Primer apparatus and methods are described herein. An example primer apparatus includes a flexible body defining an internal chamber to be fluidly coupled to a fuel system. The body includes a first layer material having a low permeation characteristic to substantially prevent diurnal emissions from escaping the fuel system, a second layer material adjacent the first layer material having a relatively high resiliency compared to the first layer material to enable the body to return to an uncompressed shape when the body is deflected and released by a user, and a third layer material adjacent to the first layer material such that the first layer material is disposed between the second layer material and the third layer material and having a relatively high resiliency compared to the first layer material to enable the body to return to the uncompressed shape when the body is deflected and released by the user.