Gaseous Fuel Rail Sensing for Real-Time Specific Gravity Detection
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Solution Overview
Problem
Existing systems struggle to accurately measure fuel characteristics, particularly specific gravity, in internal combustion engines when properties change rapidly, leading to difficulties in adjusting engine operations effectively.
Innovation Solution
A method and system that utilize a pressure sensor to analyze the amplitude and phase of pressure signals within a gaseous fuel rail to determine fuel characteristics, specifically specific gravity, and adjust operational parameters of the engine accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a pressure detection unit is used to estimate specific gravity based on calculated fuel density, then the system can provide specific gravity estimation in some circumstances, but it is unable to provide accurate specific gravity measurement when fuel characteristics change rapidly
Solution Approach 1:
The patent replaces traditional mechanical density measurement methods with acoustic wave-based measurement. By using a wave generator to create pressure waves and a sensor to detect wave characteristics (amplitude, frequency, phase) in the fuel, the system determines specific gravity through acoustic properties rather than mechanical density calculation, enabling accurate real-time measurement even when fuel characteristics change rapidly
Solution Approach 2:
The patent changes the measurement parameter from mechanical density to acoustic wave characteristics. By measuring how acoustic waves propagate through the fuel (amplitude attenuation, frequency shifts, phase changes), the system derives specific gravity from acoustic impedance and velocity, which are more sensitive and responsive to rapid fuel property changes than traditional density measurement methods
2Ease of operation
If existing specific gravity detection systems are used, then engine operations can be adjusted based on fuel properties, but manual user input is required which reduces ease of operation
Solution Approach 1:
The system performs self-service by automatically detecting fuel specific gravity and adjusting engine operations without requiring manual user input. The wave generator continuously monitors fuel acoustic properties, the controller automatically calculates specific gravity from wave characteristics, and the engine parameters are autonomously adjusted based on the detected fuel characteristics, making the entire process self-operating
Solution Approach 2:
The patent implements a closed-loop feedback system where acoustic wave measurements continuously provide information about fuel specific gravity, which feeds back to the controller to automatically adjust engine operations. This real-time feedback mechanism enables the system to adapt to changing fuel properties dynamically without manual intervention, improving both ease of operation and automation extent
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
Enables precise adjustment of engine operations based on real-time fuel characteristics without user input, improving performance, reducing emissions, and extending engine lifespan while minimizing fuel consumption.
Implementation Method 1
receiving a pressure signal from a pressure sensor indicating a pressure of the gaseous fuel within the gaseous fuel rail
Data Source
AI summary
A method for determining a fuel characteristic, the method including receiving a gaseous fuel within a gaseous fuel rail of a dual fuel engine configured to run on at least the gaseous fuel and a diesel fuel. The method may include receiving a pressure signal from a pressure sensor indicating a pressure of the gaseous fuel within the gaseous fuel rail, and identifying at least one of an amplitude and a phase of the pressure signal, The method may further include determining a characteristic of the fuel within the fuel rail based on the amplitude or the phase of the pressure signal, and, based on the determined characteristic of the fuel, modifying an operational parameter of the dual fuel engine.