LPG Pump Integrated Bracket and Three-Plunger Unit
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Solution Overview
Problem
Existing LPG fuel pumps face challenges in minimizing power consumption, noise, and vibration while maintaining a compact design and easy maintenance, particularly when returning fuel to the tank.
Innovation Solution
A fuel pump design featuring a monolithic integrated bracket with a three-plunger pump unit, a torsion bar, and a vent unit to reduce noise and vibration, along with a multi-valve set for pressure regulation and a filter placement outside the fuel tank for easy maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a conventional pump unit with separate mounting brackets is used, then assembly and maintenance are more complex, but the structural integrity and compactness are reduced
Solution Approach 1:
The patent combines the mounting bracket and pump unit into a single integrated bracket assembly. The bracket is formed as one piece with the pump unit mounted directly to it, eliminating the need for separate mounting components and simplifying both assembly and maintenance operations while maintaining structural integrity.
2Device complexity
If a single-plunger pump design is used, then the device complexity is reduced, but the power consumption and noise increase
Solution Approach 1:
The pump unit is divided into three separate plunger pumps operating in sequence. Each plunger has its own cylinder and piston assembly, allowing the system to pump fuel in three stages. This segmentation reduces the workload on each individual plunger, lowering power consumption and noise while maintaining the overall pump function.
3Volume of stationary object
If the filter is mounted inside the fuel tank, then the compactness is improved, but the maintenance difficulty increases
Solution Approach 1:
The filter is extracted from the internal fuel tank mounting and repositioned to the external fuel pump assembly. The filter is now mounted on the bracket outside the fuel tank, allowing it to be easily accessed and replaced during maintenance without requiring access to the interior of the fuel tank, while the overall assembly remains compact.
4Volume of stationary object
If the pump unit is mounted directly to the fuel tank without spacing, then the compactness is improved, but the noise and vibration increase
Solution Approach 1:
An insulation portion is introduced as an intermediary element between the pump unit and the bracket. This insulation layer acts as a vibration dampener and noise barrier, reducing the transmission of harmful vibrations and noise from the pump to the bracket and fuel tank, while maintaining the compact integrated design.
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 design achieves low power consumption, reduced noise and vibration, and simplified assembly and maintenance by utilizing a three-plunger pump and strategically placing components to minimize noise and vibration, while ensuring the correct fuel supply to the engine.
Implementation Method 1
an elastic member elastically biasing the torsion bar in a direction
Implementation Method 2
at least a pumping portion to pump fuel by a torque of the motor
Data Source
AI summary
A fuel pump for LPG (liquefied petroleum gas), may include a main bracket that may be mounted at a fuel tank, an integrated bracket that an end thereof may be fixed to the main bracket, the other end thereof may be extended to an inner side of the fuel tank, and the whole of the bracket may be integrally formed, and a pump unit that may be fixed to the other end of the integrated bracket with a space therebetween so as to pump liquefied fuel to an engine.