Ammonia Mixed-Combustion Engine Control Across Fuel Ratios
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Solution Overview
Problem
Conventional ammonia mixed combustion engines face challenges in maintaining combustion stability and improving exhaust gas properties as the ammonia supply amount increases, leading to higher mixed fuel burning ratios.
Innovation Solution
The ammonia mixed combustion engine adjusts parameters such as air excess ratio, liquid fuel injection timing, and injection pressure in accordance with changes in the mixed fuel burning ratio to enhance combustion stability and exhaust gas properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the ammonia supply amount is increased to increase the mixed fuel burning ratio, then the ammonia mixed fuel burning ratio is improved, but combustion stability decreases and exhaust gas properties deteriorate
Solution Approach 1:
The invention changes multiple parameters simultaneously including air excess ratio, injection timing, and injection pressure in response to ammonia mixing ratio changes. This coordinated parameter adjustment maintains combustion stability across different ammonia mixing ratios, resolving the contradiction between adaptability and reliability
Solution Approach 2:
The invention implements dynamic adjustment of fuel supply parameters based on the ammonia mixing ratio. The control unit dynamically modifies air excess ratio, injection timing, and injection pressure according to the current ammonia supply amount, enabling the system to adapt while maintaining stable combustion
2Adaptability or versatility
If the ammonia supply amount is increased to increase the mixed fuel burning ratio, then the ammonia mixed fuel burning ratio is improved, but exhaust gas properties deteriorate and NH3 and N2O increase in exhaust gas
Solution Approach 1:
The invention adjusts air excess ratio, injection timing, and injection pressure based on ammonia mixing ratio to optimize combustion efficiency. This ensures complete combustion of ammonia, reducing harmful emissions like unburned NH3 and N2O while maintaining high ammonia burning ratios
Solution Approach 2:
The control unit receives signals from detection devices that monitor combustion state and exhaust gas composition. Based on this feedback, the control unit adjusts fuel supply parameters to minimize harmful emissions while maintaining the desired ammonia burning ratio
3Object-generated harmful factors
If the timing of liquid fuel supply is controlled to improve exhaust gas properties, then exhaust gas properties are improved, but it becomes difficult to increase ammonia mixing ratio while also improving combustion stability
Solution Approach 1:
The invention combines control of multiple parameters (air excess ratio, injection timing, injection pressure) into a unified control strategy. This coordinated approach allows simultaneous optimization of exhaust gas properties and combustion stability across different ammonia mixing ratios
Solution Approach 2:
The system dynamically adjusts all fuel supply parameters based on the ammonia mixing ratio and combustion state. This enables the engine to maintain optimal performance and low emissions across the full range of ammonia mixing ratios from 0% to 95%
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 the engine to operate at any ammonia mixed fuel burning ratio while simultaneously improving combustion stability and exhaust gas properties, thereby enhancing product appeal across various operation modes.
Implementation Method 1
a liquid fuel supply device (15) for supplying liquid fuel to the combustion chamber
Implementation Method 2
an ammonia mixed combustion engine that operates by burning ammonia and a hydrocarbon liquid fuel
Data Source
AI summary
An ammonia mixed combustion engine 1 that operates by burning ammonia and a hydrocarbon liquid fuel causes a control unit 2 to implement at least one of decrease or increase in an air excess ratio in fuel, advance or retard in injection timing of the liquid fuel, and decrease or increase in injection pressure of the liquid fuel in accordance with increase or decrease in a mixed fuel burning ratio of ammonia in the fuel.