Constant-Pressure Fuel Mixing for Engine Cavitation Prevention
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Solution Overview
Problem
Existing fuel systems for internal combustion and turbine engines face issues with cavitation and pressure instabilities due to the presence of gaseous components, particularly when engine load varies, leading to inconsistent fuel mixture ratios and potential engine stalling.
Innovation Solution
A fuel enhancement system that maintains a constant mixture ratio and pressure of liquid and gaseous components using a metering device, flow control, and variable pressure pumps, ensuring uniform distribution of gaseous components throughout the mixture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a gaseous component is added to liquid fuel to improve combustion efficiency, then fuel efficiency is improved, but cavitation and pressure instabilities occur in the fuel system
Solution Approach 1:
The system pre-mixes the gaseous component and liquid fuel in controlled proportions before the fuel reaches the pump, ensuring the mixture is properly prepared in advance to prevent cavitation and pressure instabilities during pumping
Solution Approach 2:
A dedicated mixing chamber acts as an intermediary between the gas source and fuel system, properly combining the gaseous component with liquid fuel before introducing it to the pump, thereby preventing direct gas ingestion that causes cavitation
2Power
If the engine load increases to meet higher power demand, then power output is improved, but the pressure at the pump input decreases causing gas bubbles to expand
Solution Approach 1:
Pressure sensors monitor the fuel mixture pressure at the pump input, and the control system adjusts the gaseous component flow rate in real-time to maintain proper pressure and prevent bubble expansion during varying engine loads
Solution Approach 2:
The system dynamically adjusts the ratio of gaseous component to liquid fuel based on real-time operating conditions and pressure feedback, allowing the mixture composition to adapt to changing engine demands while maintaining stability
3Device complexity
If a conventional pump system is used to handle fuel mixtures with gaseous components, then device simplicity is maintained, but cavitation and engine stalling occur
Solution Approach 1:
The pump system is designed to handle both pure liquid fuel and gas-liquid mixtures universally, maintaining the same basic pump architecture while adding a mixing chamber and control system that enable reliable operation with gaseous components without requiring completely different pumping technology
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 system provides a stable, pressurized fuel mixture that maintains consistent engine operation by preventing large gas bubbles, ensuring efficient fuel delivery and preventing engine stalling.
Implementation Method 1
a variable pressure pump system that pressurizes the mixture to a substantially constant predetermined pressure
Implementation Method 2
an infusion volume through which the mixture flows such that the gaseous component is distributed substantially uniformly throughout the mixture
Data Source
AI summary
A fuel enhancement method and system for supplying the engine with a pressurized fuel mixture comprising a mixture of the liquid fuel and the gaseous component including provisions to maintain the ratio of gas to liquid in the mixture at a predetermined value and maintain the pressure of the fuel mixture applied to the engine at a predetermined value. A system using variable speed drive pumps is disclosed.