Fuel Filter Auto Drain Valve for Complete Water Drainage
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Solution Overview
Problem
Existing manual and solenoid-based water drain systems for fuel filters require operator intervention and can lead to incomplete drainage, potential engine damage, and fuel pollution, as they need to be pressurized and may be forgotten or operated incorrectly.
Innovation Solution
An auto drain valve with a piston and solenoid coil system that automatically opens to drain water without operator intervention, using a spring-biased sealing mechanism to simultaneously control air and liquid outlets, and includes a water level sensor for automated operation and a threading mechanism for easy disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple drain cock is utilized for the valve, then the device complexity is reduced, but the drainage is not complete or may not occur at all because a partial vacuum is created in the filter housing
Solution Approach 1:
The patent employs a dynamic valve mechanism with a movable valve body that transitions between closed and open states. The valve body is connected to a piston that moves in response to pressure differential changes, allowing the valve to dynamically adapt to vacuum conditions and enable complete drainage when pressure equalizes.
Solution Approach 2:
The patent introduces an intermediary air inlet passage that allows air to enter the filter housing to equalize pressure differences. This intermediary pathway mediates between the vacuum condition and the drainage requirement, enabling the valve to open and drainage to proceed completely.
2Ease of operation
If manual water drain systems are positioned in easily accessible locations, then the ease of operation is improved, but the device complexity increases due to additional components and positioning mechanisms
Solution Approach 1:
The patent implements an automatic drainage system that operates without operator intervention. The control mechanism automatically detects water accumulation and activates the drainage process, making the system self-service and eliminating the need for manual operation while maintaining simple positioning.
3Reliability
If the filter is continuously monitored for water accumulation, then the reliability is improved, but the use of energy increases due to continuous sensing and control operations
Solution Approach 1:
The patent employs periodic or event-triggered monitoring rather than continuous monitoring. The control mechanism activates drainage based on periodic checks or when specific conditions are met (such as water level thresholds), reducing energy consumption while maintaining reliable water detection and removal.
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
Ensures complete and automatic drainage of water from fuel filters, reducing the risk of engine damage and fuel pollution, while being easy to maintain and operate without operator oversight, with a robust design capable of multiple cycles without failure.
Implementation Method 1
solenoid coil 09 surrounds the piston rod 08
Implementation Method 2
spring 01 and spring 02 resiliently biasing on the Piston 111
Implementation Method 3
sealing disk 07 and sealing member 03
Data Source
AI summary
An auto drain valve 100 comprises a valve body 222 wherein a piston 111 having a piston rod 08 with sealing disk 07 and sealing member 03 which is movable within said valve body 222 wherein air vent 30 and liquid outlet 40 and closes simultaneously. Further the valve body 222 is connected to the bowl 10; valve body 222 consisting of air vent 30, liquid inlet 40′ and liquid outlet 40; moveable piston 111, solenoid coil 9 surrounding the piston rod 08; spring 01 and spring 02 resiliently biasing on the Piston 111 seal air vent 30 and liquid outlet 40 in its de-energized condition; when the solenoid coil 09 is energized and Piston 111 moves away from air vent 30 and liquid outlet 40 simultaneously, liquid is drained form bowl 10 through liquid inlet 40′ into valve body 222 and drained out form liquid outlet 40.