Fuel Spectroscopy for Engine Control Optimization
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Solution Overview
Problem
Current engine control systems fail to fully optimize engine performance and emissions due to the lack of consideration for the intrinsic quality of fuel, which varies significantly and is not accurately represented by standardized physicochemical properties, leading to suboptimal fuel torque and increased emissions.
Innovation Solution
A method that involves on-board analysis of the fuel's molecular structure using near-infrared spectroscopy to adjust engine parameters, laws, and maps for injection, combustion, and post-treatment, allowing for real-time optimization based on the specific fuel composition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If standardized physicochemical properties (octane number, cetane number) are used to characterize fuel quality, then fuel quality can be measured using conventional methods, but the measurement precision and relevance for engine control is insufficient due to significant variability in actual fuel composition
Solution Approach 1:
The patent replaces conventional mechanical/chemical fuel analysis methods with spectroscopic analysis (NIR, MIR, Raman, or mass spectrometry). This substitution enables direct molecular-level characterization of fuel components without requiring complex calibration procedures based on standardized properties, thereby improving measurement precision while maintaining system feasibility through non-intrusive optical or electromagnetic sensing
Solution Approach 2:
The patent transitions from measuring standardized physicochemical parameters (octane number, cetane number) to directly analyzing molecular structure parameters (hydrocarbon families, oxygenated compounds, aromatic content). This parameter change enables more precise characterization of fuel composition that directly correlates with combustion behavior, allowing for better engine control without relying on indirect standardized measurements
2Productivity
If engine control parameters are optimized for average fuel composition, then good enough efficiency can be achieved across geographical areas, but engine performance and emissions cannot be fully optimized due to fuel quality variations
Solution Approach 1:
The patent implements a feedback mechanism where the spectroscopic sensor continuously analyzes fuel composition, and the electronic control system adjusts engine parameters (injection timing, injection quantity, ignition advance, EGR rate) based on the measured molecular structure. This closed-loop feedback enables real-time optimization of engine performance and emissions control adapted to the actual fuel being consumed, rather than relying on pre-programmed maps for average compositions
Solution Approach 2:
The patent transforms the static engine control maps (optimized for average fuel composition) into a dynamic control system that continuously adapts to actual fuel variations. The electronic control system modifies injection and combustion parameters in real-time based on spectroscopic measurements, enabling the engine to dynamically optimize performance and minimize emissions regardless of fuel quality fluctuations
3Reliability
If manufacturers provide safety margins in engine control to compensate for fuel quality variations, then engine reliability is maintained, but fuel consumption increases and performance is compromised
Solution Approach 1:
The spectroscopic feedback system enables the electronic control to precisely adapt engine parameters to actual fuel composition, eliminating the need for conservative safety margins. By knowing the exact molecular structure of the fuel, the control system can optimize injection and combustion parameters for maximum efficiency while maintaining reliability, thereby reducing fuel consumption compared to systems that must operate with fixed safety margins
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 universal measurement of fuel quality, improving engine performance and reducing emissions by tailoring engine settings to the actual fuel characteristics, rather than relying on outdated standardized properties.
Implementation Method 1
a step of spectroscopic analysis of the molecular structure of the hydrocarbons making up the fuel
Implementation Method 2
the spectroscopic analysis consists of a near infrared analysis of the fuel
Data Source
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AI summary
The invention concerns a method for optimizing operating parameters of a heat engine controlled by an electronic or digital system (12) integrating at least one parameter or one law or one mapping, for injection, combustion or engine post-treatment. The invention is characterized in that it includes a step of analyzing the molecular structure of the fuel based on at least one sensor (7) implanted in the fuel circuit of the engine (1) comprising the filling system (3), the tank (2), the pump (5), the fuel filter (6) and the engine feeding circuitry (4) and the return circuit (11) to the tank, and a step of selecting of modifying said parameter, said law or said mapping for injection, combustion or post-treatment based on the result of said analysis. The analysis is spectroscopic, such as a near-infrared, ultraviolet or nuclear magnetic resonance spectroscopic analysis.