LPG Fuel Pump Relocation for Safe Maintenance
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Solution Overview
Problem
The high failure rate of electric LPG injection pumps due to contaminants like ferrous particulate in LPG fuels complicates maintenance and increases costs, as existing systems require complex and dangerous procedures to replace components within pressurized tanks.
Innovation Solution
An apparatus with a multivalve system that houses the fuel pump and filtering elements outside the tank, allowing for safe maintenance and replacement without depressurizing the tank, and incorporates a magnetic filter to remove ferrous waste particulate, enabling the use of brushless pumps for reliable and efficient fuel delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the fuel pump and filtering elements are housed inside the pressurized tank, then the system is compact and integrated, but maintenance and replacement of components require complex and dangerous depressurization procedures
Solution Approach 1:
The system is divided into two separate locations: the filtering element remains inside the pressurized tank for compact integration, while the fuel pump is relocated to the valve body outside the tank. This segmentation allows the filtering element to maintain its integrated position for space efficiency, while the pump can be easily accessed for maintenance without depressurizing the tank.
Solution Approach 2:
The fuel pump is extracted from the pressurized tank environment and relocated to the valve body. This extraction eliminates the safety hazards and complex procedures associated with maintaining components inside a pressurized container, while the filtering element remains inside to preserve system integration and compactness.
2Reliability
If traditional filters are used in the fuel system, then ferrous particulate contaminants accumulate and cause pump failures, but increasing filtration capacity adds system complexity
Solution Approach 1:
The magnetic filter converts the harmful ferrous particulate contaminants into a beneficial separation process. By using magnetic field forces, the system automatically captures and retains ferrous particles that would otherwise damage the pump, transforming a reliability problem into an effective filtration solution without adding significant complexity.
Solution Approach 2:
The traditional mechanical filtration system is replaced with a magnetic filtration system. Instead of using complex mechanical filters that require frequent maintenance and create pressure drops, the system uses a magnetic field to capture ferrous particulates, simplifying the filtration mechanism while improving pump reliability.
3Reliability
If brushless pumps are used instead of traditional pumps, then reliability and efficiency improve, but the cost and complexity of the system increase
Solution Approach 1:
The brushless pump with magnetic filter creates a self-protecting system where the magnetic filter automatically captures ferrous particulates before they can damage the pump. This self-service filtration reduces the need for complex maintenance systems and makes the brushless pump a reliable, long-lasting component that justifies its initial complexity through reduced operational interruptions.
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
This solution simplifies maintenance, reduces the risk of damage from contaminants, and allows for the use of brushless pumps, enhancing the reliability and efficiency of LPG fuel injection systems while minimizing the complexity and danger of tank operations.
Implementation Method 1
incorporates a magnetic filter to remove ferrous waste particulate
Data Source
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AI summary
An apparatus for feeding a fuel, in particular in the form of LPG, to an internal combustion engine comprises a tank (1) for containing the fuel and means (11) for delivering the fuel from the tank to the engine. Means (26) are provided for allowing the fuel to flow towards the delivery means when the delivery means (11) are engaged in the working position and for shutting off the fuel flow towards the delivery means (11) when the delivery means (11) are disengaged and out of the working position.