Hydrogen-Gas Engine Control Using Cylinder Pressure Feedback
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Solution Overview
Problem
Dual-fuel engine systems face limitations in meeting stringent greenhouse gas emission regulations, despite their ability to balance economic efficiency and eco-friendliness.
Innovation Solution
A multi-fuel engine system that adjusts the proportion of eco-friendly hydrogen fuel and EGR rate based on detected cylinder pressure and combustion center, optimizing the mixture of gas fuel and hydrogen to reduce greenhouse gas emissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If gas fuel is used in a dual-fuel engine system, then economic efficiency and eco-friendliness are improved, but greenhouse gas emission regulations cannot be fully met
Solution Approach 1:
The patent changes the fuel composition parameter by introducing hydrogen as a variable component in the fuel mixture. The controller adjusts the hydrogen-to-gas-fuel ratio based on detected combustion parameters (maximum pressure, center of combustion), enabling the system to meet emission regulations while maintaining economic efficiency. This parameter change allows the engine to operate within stricter emission standards than conventional dual-fuel systems.
Solution Approach 2:
The patent implements a feedback control system where sensors detect combustion parameters (maximum pressure, center of combustion) and feed this information to the controller. The controller uses this feedback to dynamically adjust the hydrogen injection amount, ensuring optimal combustion while minimizing greenhouse gas emissions. This closed-loop feedback enables precise control of the fuel mixture to meet emission regulations.
2Object-generated harmful factors
If hydrogen proportion is increased to reduce greenhouse gas emissions, then emission standards are improved, but cylinder pressure and combustion stability may be compromised
Solution Approach 1:
The controller continuously monitors combustion parameters (maximum pressure, center of combustion) and adjusts the hydrogen proportion based on this feedback. When hydrogen is increased to reduce emissions, the system detects changes in combustion stability through pressure and timing parameters, and dynamically adjusts the hydrogen-to-gas-fuel ratio to maintain reliable combustion while minimizing nitrogen oxide and methane emissions.
Solution Approach 2:
The patent makes the fuel mixture composition dynamic rather than fixed. The hydrogen proportion is continuously adjusted during operation based on real-time combustion conditions, allowing the system to optimize emission reduction while maintaining combustion stability. This dynamic adaptation enables the engine to respond to varying operating conditions and maintain reliable performance.
3Productivity
If EGR rate is adjusted to optimize combustion, then combustion efficiency is improved, but control complexity increases
Solution Approach 1:
The controller performs multiple functions by integrating detection and control of multiple parameters (maximum pressure, center of combustion, EGR rate, hydrogen proportion) into a single unified control system. This multi-functional approach improves combustion efficiency through coordinated optimization of multiple variables while managing complexity through integrated control rather than separate control systems.
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 effectively minimizes emissions of nitrogen oxide and methane gas by optimizing the hydrogen and gas fuel mixture, improving combustion efficiency and adhering to stringent emission standards.
Implementation Method 1
a multi-fuel engine system configured use gas fuel and hydrogen
Implementation Method 2
adjusting an EGR rate, thereby reducing the emission of greenhouse gas
Data Source
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AI summary
An aspect of the present disclosure provides a method for controlling a multi-fuel engine system configured use gas fuel and hydrogen, wherein maximum pressure and center of combustion of a cylinder may be detected while the multi-fuel engine system is operated, and a ratio of hydrogen to be mixed with gas fuel may be determined on the basis of the detected maximum pressure and center of combustion in the cylinder.