Fuel Filter Venting Layout to Reduce Air Cushion Volume
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Solution Overview
Problem
Existing fuel filters for internal combustion engines have a large air cushion volume that delays engine startup and require complex, costly filter housings.
Innovation Solution
The fuel filter design reduces the air cushion volume by minimizing the distance between the filter housing cover and venting device, using a detachable connection with threads and O-rings, and routing the venting channel through a function carrier within the ring filter element.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the distance between filter housing cover and venting device is reduced, then the air cushion volume is reduced and engine startup is faster, but the manufacturing complexity of the filter housing increases
Solution Approach 1:
The filter housing is divided into a filter housing cover and a filter housing body, allowing the venting device to be positioned closer to the cover while maintaining structural integrity. This segmentation enables reduced air cushion volume without compromising the overall housing strength.
Solution Approach 2:
The venting device is integrated within the filter housing structure, with the venting channel routed through the filter housing body. This nesting approach minimizes the distance between the cover and venting device while avoiding additional external complexity.
2Loss of time
If the venting channel is routed through the filter housing, then the air cushion volume is reduced, but the manufacturing cost increases due to elaborate casting requirements
Solution Approach 1:
The venting channel is separated into two parts: a first venting channel in the filter housing cover and a second venting channel in the filter housing body. This segmentation allows each part to be manufactured separately using simpler processes, then assembled together, reducing overall manufacturing complexity.
Solution Approach 2:
The filter housing body acts as an intermediary structure that receives the first venting channel from the cover and continues it as the second venting channel. This intermediary approach allows the venting function to be achieved without requiring elaborate integrated casting.
3Productivity
If the air cushion volume is reduced, then engine startup is faster, but the filter housing design becomes more complex
Solution Approach 1:
The venting channels are arranged in a vertical dimension, with the first venting channel extending from the cover downward and the second venting channel continuing downward through the housing body. This vertical arrangement efficiently reduces air cushion volume by creating a direct vertical venting path.
Solution Approach 2:
The venting function is segmented across multiple components (cover and housing body), allowing each component to have a simpler, more straightforward design while collectively achieving the goal of reduced air cushion volume and faster startup.
Data Source
AI summary
A fuel filter for an internal combustion engine may include a filter housing, a ring filter element arranged in the filter housing, a function carrier engaging in an interior space of the ring filter element, a water collection space arranged below the ring filter element, a first venting part channel, and a second venting part channel. The function carrier may include a clean channel extending therein. The first venting part channel may extend from the water collection space through the function carrier and may be communicatingly connected to an air discharge channel extending in the function carrier. The second venting part channel may extend through an upper end disc of the ring filter element and may be communicatingly connected to the air discharge channel.