Fueling Device Atmosphere Communication Valve
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Solution Overview
Problem
Existing fueling devices face issues with atmospheric air being introduced into the nozzle insertion channel, leading to air bubbles in the fuel tank during fueling, as the annular channel communicates with the nozzle insertion channel, causing unwanted atmosphere introduction.
Innovation Solution
A fueling device design featuring a channel forming member with a barrier section that includes an atmosphere communication hole and a flow path communication hole, equipped with a valve mechanism to prevent atmosphere passage during fueling, and multiple barrier members to enhance water and dust resistance by altering the flow path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the annular channel communicates with the nozzle insertion channel to allow atmosphere communication, then the channel can establish communication with the atmosphere, but atmosphere is introduced into the nozzle insertion channel during fueling causing air bubbles in the fuel tank
Solution Approach 1:
The annular channel is divided into multiple segments by barrier members (first barrier member, second barrier member, third barrier member) positioned at different locations. This segmentation allows the channel to maintain atmosphere communication while preventing continuous atmospheric flow into the nozzle insertion channel during fueling operations.
Solution Approach 2:
Barrier members are introduced as intermediary elements within the annular channel. These barriers act as mediators that allow the channel to fulfill its atmosphere communication function while blocking the harmful introduction of atmosphere into the fuel flow path through the nozzle insertion channel.
2Reliability
If the channel forms a continuous annular structure for atmosphere communication, then communication with atmosphere is established, but water and dust from atmosphere are carried into the channel
Solution Approach 1:
The continuous annular channel is segmented by multiple barrier members positioned at different angular locations. This segmentation creates multiple small openings rather than one large continuous opening, reducing the intake of water and dust while maintaining adequate atmosphere communication for pressure equalization.
Solution Approach 2:
Barrier members are positioned at different angular positions around the annular channel, creating a multi-dimensional arrangement. This spatial distribution of barriers reduces the effective opening area for water and dust entry while maintaining atmosphere communication functionality.
Data Source
AI summary
A channel forming member is attached to a filler neck on a nozzle insertion side where a fueling nozzle is to be inserted. The channel forming member includes a barrier section that forms an insertion flow path section for the fueling nozzle in the fuel flow path on the nozzle insertion side, while forming an annular channel surrounding the insertion flow path section so as to separate the channel from the insertion flow path section. The channel forming member further includes the following provided to the barrier section: an atmosphere communication hole for making the channel communicate with the atmosphere; a flow path communication hole for making the channel communicate with an insertion end flow path section downstream from the insertion flow path section; and a valve mechanism that prevents passage of the atmosphere through the channel in a fueling period. This contributes to reduction in introduction of the atmosphere into the fuel flow path through the channel in a fueling period.