Fuel Pump Control Device Mitigating Impeller Housing Interference
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Solution Overview
Problem
In fuel supply systems, the deterioration of fuel pumps can lead to reduced performance and potential failure, especially due to interference between the impeller and housing, which is exacerbated by increased fuel temperature, causing the impeller to deform and fail to rotate effectively.
Innovation Solution
A control device that detects interference between the impeller and housing and performs a coping process by increasing the impeller's operation, setting a higher lower limit for its rotation speed, and prohibiting the fuel pump's stoppage during fuel injection cessation to mitigate wear and maintain continuous operation, thereby reducing interference and preventing pump failure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the impeller rotation speed is increased to mitigate interference with the housing, then the impeller's ability to rotate well is improved, but wear of the impeller and housing progresses
Solution Approach 1:
The control device changes the operating parameters of the impeller by increasing its rotation speed when interference with the housing is detected. This parameter change helps mitigate the interference and improves the impeller's rotation performance, allowing the system to adapt to deteriorating conditions
Solution Approach 2:
The control device implements a feedback mechanism that monitors the interference state between the impeller and housing. Based on this feedback, the control device adjusts the impeller rotation speed accordingly, creating a closed-loop control system that responds to actual operating conditions
2Loss of energy
If the fuel pump is stopped during fuel injection cessation to save energy, then energy consumption is reduced, but the impeller stops rotating and interference with the housing increases
Solution Approach 1:
The control device dynamically adjusts the fuel pump operation based on real-time detection of impeller-housing interference. When interference is detected, the fuel pump continues operating even during fuel injection cessation, preventing the impeller from stopping and maintaining its rotation to reduce interference
Solution Approach 2:
The control device ensures continuous rotation of the impeller by maintaining fuel pump operation during periods when fuel injection would normally cause the pump to stop. This continuity of useful action prevents the impeller from stagnating and reduces interference with the housing
Data Source
AI summary
A control device is applied to a fuel supply system including a fuel pump that rotates an impeller in a housing and pumps fuel from a fuel tank and a fuel pipe in which fuel discharged from the fuel pump flows. The control device controls the fuel pump. The control device includes an execution device and a storage device that stores a program of a process which is performed by the execution device. In the control device, the execution device performs a coping process of increasing an amount of operation of the impeller when the impeller is deformed and interference with the housing is detected in comparison with a case in which the interference is not detected.