Fuel Pump Diverter Plate for Noise and Wear Reduction
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Solution Overview
Problem
Fuel pumps experience issues with foreign matter deposition in the pumping arrangement, leading to binding and increased wear, and generate undesirable noise due to pressure pulsations during operation.
Innovation Solution
A diverter plate is introduced between the outlet plate and the electric motor, featuring a diverter passage and an imperforate wall that prevents foreign matter from entering the pumping arrangement and mitigates pressure pulsations by laterally directing fluid and breaking up pressure waves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the fuel pump is oriented with the pumping section down and outlet section up, then fuel can be pumped effectively from inlet to outlet, but foreign matter settles in the pumping arrangement causing binding and increased wear
Solution Approach 1:
A diverter plate is introduced as an intermediary component between the outlet plate and the pumping arrangement. This plate includes an imperforate wall that acts as a physical barrier to redirect foreign matter away from the pumping arrangement while allowing fuel to pass through designated passages, thus protecting the pumping mechanism without compromising fuel delivery
2Device complexity
If the outlet plate outlet passage is directly connected to the outlet, then fuel flow path is simple, but pressure pulsations propagate through the structure generating noise
Solution Approach 1:
The diverter plate serves as a mediator in the fuel flow path between the outlet plate and the outlet. It includes a diverter passage that redirects fuel flow and an imperforate wall that breaks up pressure pulsation waves, thereby reducing noise generation while maintaining a relatively simple overall structure
Solution Approach 2:
The imperforate wall on the diverter plate introduces a lateral dimension to fuel flow redirection. By laterally directing fuel away from the outlet passage and through the diverter passage, the system breaks up pressure pulsations in a different spatial dimension, reducing noise without significantly complicating the flow path
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 diverter plate effectively prevents foreign matter deposition and reduces noise by ensuring that particulate matter settles away from the pumping mechanism and breaks up pressure pulsations, enhancing the operational reliability and quietness of the fuel pump.
Implementation Method 1
an imperforate wall which is axially aligned with the outlet plate outlet passage such that the imperforate wall laterally directs fluid from the outlet passage to the diverter passage
Implementation Method 2
The diverter plate also mitigates pressure pulsations generated by the pumping arrangement, thereby minimizing noise generated by the fluid pump
Implementation Method 3
the diverter plate having a diverter passage which provides fluid communication from the outlet plate outlet passage, past the electric motor, to the outlet
Data Source
AI summary
A fluid pump includes a housing; an outlet; an inlet plate within the housing and having an inlet; an outlet plate disposed within the housing and having an outlet plate outlet passage; an electric motor which rotates about an axis; a pumping arrangement rotationally coupled to the electric motor such that rotation of the pumping arrangement causes fluid to be pumped from the inlet to the outlet plate outlet passage and through the outlet; a diverter plate between the outlet plate outlet passage and the electric motor and having a diverter passage which provides fluid communication from the outlet plate outlet passage, past the electric motor, to the outlet, the diverter plate also having an imperforate wall which is axially aligned with the outlet plate outlet passage such that the imperforate wall laterally directs fluid from the outlet passage to the diverter passage.