Dual-Zone Washer Fluid Reservoir with Float Valves
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Solution Overview
Problem
Existing washer fluid reservoirs with a single low point are inefficient in managing fluid distribution across multiple zones, leading to uneven depletion and potential air intake during fluid delivery, which affects the cleaning efficiency of vehicle components.
Innovation Solution
A washer fluid delivery system with a reservoir having two zones, each with a low point, utilizing a pump and floatable valves that switch between flow permitting and restricting positions based on fluid levels to prevent air intake and ensure continuous fluid supply from one zone when the other is depleted.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single zone washer fluid reservoir is used, then the device complexity is reduced, but the reliability of fluid delivery deteriorates due to potential air intake and uneven depletion
Solution Approach 1:
The washer fluid reservoir is divided into multiple zones (first zone and second zone), each with its own low point and float valve. This segmentation allows independent fluid level management in each zone, preventing air intake and ensuring reliable fluid delivery to the pump regardless of which zone is being depleted.
2Reliability
If multiple pumps are used to service multiple zones, then the reliability of fluid delivery is improved, but the device complexity and cost increase
Solution Approach 1:
Multiple zones are served by a single pump system. The float valves in each zone independently control fluid flow to the common pump, merging the fluid delivery function into one component while maintaining reliable supply from multiple zones. This eliminates the need for multiple pumps while preserving reliability.
3Manufacturing precision
If a single low point is used in the reservoir, then the manufacturing precision requirements are reduced, but the productivity of fluid distribution deteriorates due to uneven depletion
Solution Approach 1:
The reservoir is segmented into multiple zones, each with its own low point positioned to optimize fluid collection. This allows fluid to be evenly distributed and depleted across zones, improving productivity by ensuring the pump always has access to fluid without requiring high manufacturing precision for a single low point location.
4Reliability
If the reservoir size is increased to prevent air intake, then the reliability of fluid delivery is improved, but the volume of the reservoir increases unnecessarily
Solution Approach 1:
The reservoir is divided into zones with separate low points and float valves. This segmentation allows the reservoir to maintain a compact volume while ensuring reliable fluid delivery, as each zone independently manages its own fluid level and prevents air intake without requiring excessive total volume.
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 system ensures efficient distribution of washer fluid across vehicle components by preventing air intake and prolonging the supply by switching between zones, reducing the need for larger reservoirs and multiple pumps, thus enhancing cleaning efficiency and reducing costs.
Implementation Method 1
The first valve is configured to float in washer fluid within the first zone, and the second valve is configured to float in washer fluid within the second zone
Data Source
AI summary
A washer fluid delivery system includes a washer fluid reservoir having a first zone with a first low point and a second zone with a second low point. A first valve is disposed in the first zone. The first valve is moveable back and forth between a flow permitting position and a flow restricting position in response to an amount of washer fluid within the first zone. A second valve is disposed in the second zone. The second valve is moveable back and forth between a flow permitting position and a flow restricting position in response to an amount of washer fluid within the second zone. A pump operates to draw a washer fluid from the first zone when the first valve is in the flow permitting position, and to draw a washer fluid from the second zone when the second valve is in the flow permitting position.