Gaseous Fuel Engine Combustion Control via Real-Time Ignition Adjustment
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Solution Overview
Problem
Current gaseous fuel internal combustion engines lack the ability to control combustion in a single combustion cycle, allowing only changes to operating parameters based on previous cycle measurements, which limits optimization of combustion efficiency and emissions.
Innovation Solution
Implementing a method that uses real-time measurements, such as cylinder pressure, to determine combustion parameters and adjust the ignition device in the same cycle, allowing for immediate control of combustion to achieve a desired profile, including counter-measures for pre-ignitions like deactivating the ignition or opening a pressure relief valve.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If real-time measurements and control are implemented, then combustion efficiency and emissions are optimized, but device complexity increases
Solution Approach 1:
The patent implements a feedback control system where combustion parameters (such as cylinder pressure, temperature, or exhaust gas composition) are measured in real-time during the combustion cycle, compared to desired values, and used to adjust ignition timing or other combustion parameters in the same or subsequent cycles. This closed-loop feedback enables optimization of combustion efficiency and emissions while providing a systematic approach to managing the control complexity.
2Loss of time
If combustion control is implemented in a single combustion cycle, then response time is reduced, but measurement and control precision requirements increase
Solution Approach 1:
The patent performs measurements and determines desired combustion parameters in advance of the combustion event, preparing control signals before ignition occurs. This allows the control system to execute adjustments at the optimal moment during the combustion cycle without requiring complex real-time calculations during the actual combustion process, thereby reducing effective response time while managing measurement precision requirements.
3Stability of the object's composition
If multiple measurements and control adjustments are made, then combustion stability is improved, but processing time increases
Solution Approach 1:
The patent implements periodic measurement and control adjustment cycles that are synchronized with the engine's combustion cycles. By performing measurements and control actions at regular, predetermined intervals corresponding to engine operation cycles, the system maintains combustion stability through consistent control while minimizing processing time by avoiding continuous or excessive measurements.
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
This approach enables optimization of combustion efficiency, reduces exhaust emissions, and enhances engine operation stability by allowing for real-time adjustments within a single combustion cycle.
Implementation Method 1
performing at least one measurement relating to the combustion of the mixture of gaseous fuel and air in the combustion chamber
Implementation Method 2
an ignition device configured to ignite a mixture of gaseous fuel and air in a combustion chamber of a cylinder
Data Source
AI summary
A method of operating a gaseous fuel internal combustion engine comprises performing at least one measurement relating to the combustion of a mixture of gaseous fuel and air in a combustion chamber of an associated cylinder in a combustion cycle. At least one combustion parameter, for example, a start of combustion, is determined based on the at least one measurement. When the combustion parameter differs from a desired combustion parameter, an ignition device associated with the cylinder is controlled based on the comparison in order to control the combustion in the current combustion cycle.