Suction-Side Automatic Drain Valve for Fuel Water Separator Reliability
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Solution Overview
Problem
Fuel water separator filter systems require periodic manual draining of separated water, which can lead to system failures and increased maintenance and repair costs if not done correctly, as water can still enter the fuel system and damage components.
Innovation Solution
An automatic drain system that includes a liquid-in-fuel sensor to detect water levels, a pump powered by a battery, and a circuit board to activate the pump when the water level exceeds a certain threshold, allowing for independent and automated drainage of water from the filter system, even when the engine is off.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If manual draining is used, then device complexity is reduced, but reliability deteriorates due to potential system failures from improper draining
Solution Approach 1:
The drainage system automatically activates when water accumulates in the sump. The liquid-in-fuel sensor detects the presence of water and triggers the pump to drain it, eliminating the need for manual intervention while ensuring reliable water removal from the fuel system.
Solution Approach 2:
The patent replaces manual mechanical draining operations with an automated electronic control system. The sensor-based detection and electric pump mechanism substitute for manual draining actions, improving reliability without significantly increasing overall system complexity.
2Ease of operation
If periodic manual draining is required, then ease of operation is reduced, but manufacturing precision can be maintained
Solution Approach 1:
The system performs self-draining through automated detection and pumping. The liquid-in-fuel sensor continuously monitors the sump and activates the pump when water is detected, making the drainage operation automatic and eliminating manual intervention requirements.
Solution Approach 2:
The drainage system operates continuously to maintain fuel system integrity. Rather than requiring periodic manual intervention, the automated system ensures water is removed as soon as it accumulates, providing continuous protection against water-related damage.
3Reliability
If automatic drain system with sensor and pump is implemented, then reliability is improved, but device complexity increases
Solution Approach 1:
The automatic drain system uses a liquid-in-fuel sensor to detect water presence and automatically activates the pump for drainage. This self-service mechanism ensures reliable water removal without requiring complex external control systems or manual intervention.
Solution Approach 2:
The liquid-in-fuel sensor acts as an intermediary between the water accumulation condition and the pump activation. This simple sensing mechanism translates the physical presence of water into an electrical signal that triggers the drainage pump, providing reliable automation with minimal complexity.
4Productivity
If water is not drained regularly, then productivity is maintained, but harmful factors increase due to water entering fuel system
Solution Approach 1:
The system automatically detects and drains water from the sump using the liquid-in-fuel sensor and pump mechanism. This self-service drainage prevents water from accumulating to levels that could contaminate the fuel system and cause damage, maintaining productivity without interruption.
Solution Approach 2:
The automatic drain system takes preliminary action to remove water before it can enter the fuel system and cause harm. By continuously monitoring the sump and draining water proactively, the system prevents water contamination and its associated damage before it occurs.
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
Prevents water from entering the fuel stream, reducing the risk of system damage and maintenance costs by ensuring consistent and automatic drainage of water from the filter system, without the need for solenoid valves or complex wiring, and providing a safe storage for drained liquids.
Implementation Method 1
a liquid in-fuel sensor configured to detect a liquid level in a water sump
Implementation Method 2
The pump has an active state and an inactive state. The active state causes the pump to draw liquid in from the inlet and direct liquid toward the outlet
Implementation Method 3
A battery is configured to power the pump
Data Source
AI summary
Various example embodiments relate to an automatic drain system for use with a fluid water separator. The automatic drain system includes a liquid-in-fuel sensor configured to detect a liquid level in a water sump. A pump includes an inlet in fluid communication with the water sump and an outlet in fluid communication with the inlet. The pump has an active state and an inactive state. The active state causes the pump to draw liquid in from the inlet and direct liquid toward the outlet. A battery is configured to power the pump. A circuit board is operably connected to the pump and battery. The circuit board includes at least one circuit having a first state and a second state. The first state prevents power flow from the battery to the pump. The second state facilitates power flow from the battery to the pump, transitioning the pump from inactive to active.