Dual Fuel Injection Control for Ethanol Concentration Divergence
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Internal combustion engines in flex fuel vehicles face challenges in determining the Ethanol concentration in fuel, leading to difficulties in optimizing fuel economy and engine control when the fuel system contains different Ethanol concentrations.
Innovation Solution
A method and system that utilize a processor to receive Ethanol concentration data, determine changes exceeding a threshold, and calculate a volume ratio between dual fuel injection systems to output control signals, ensuring that both systems operate with the same fuel after a change, such as refueling, by disabling control based on the volume ratio to maintain optimal fuel delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the vehicle uses dual fuel injection systems to handle different Ethanol concentrations, then the adaptability to various fuel types is improved, but the difficulty of determining which Ethanol concentration is being delivered worsens
Solution Approach 1:
The system continuously monitors Ethanol concentration in the fuel system and uses this feedback to dynamically adjust the operation of dual fuel injection systems. The controller receives real-time concentration data and modifies injection strategies accordingly, ensuring optimal performance while maintaining awareness of fuel composition throughout the system.
Solution Approach 2:
A fuel concentration sensor acts as an intermediary device positioned in the fuel system to detect Ethanol concentration. This sensor provides indirect measurement capability, allowing the controller to determine fuel composition without directly analyzing fuel at multiple points, thereby reducing system complexity while maintaining detection accuracy.
2Use of energy by moving object
If the system controls fuel injection based on Ethanol concentration to optimize fuel economy, then the fuel economy is improved, but the device complexity increases
Solution Approach 1:
The control system is designed to perform multiple functions using a single integrated controller. The controller not only manages fuel injection timing and quantity but also monitors Ethanol concentration, determines fuel composition in dual systems, and adjusts operational parameters. This multi-functionality reduces the need for separate dedicated devices for each function, thereby limiting the increase in overall system complexity.
Solution Approach 2:
The system optimizes fuel economy by dynamically changing operational parameters such as injection timing, injection quantity, and air-fuel ratio based on detected Ethanol concentration. Rather than adding complex hardware, the system achieves improved fuel economy through software-based parameter adjustment, keeping device complexity manageable.
3Stability of the object's composition
If the system determines fuel divergence between dual injection systems to maintain consistent Ethanol concentration, then the homogeneity of fuel delivery is improved, but the measurement precision requirements increase
Solution Approach 1:
The system determines the volume ratio between dual fuel injection systems in advance and uses this pre-calculated ratio to control fuel delivery. By establishing the divergence point and calculating required injection ratios beforehand, the system can maintain homogeneous Ethanol concentration delivery without requiring continuous high-precision measurement during operation, thereby reducing real-time measurement precision requirements.
Data Source
AI summary
Systems and methods for controlling a fuel system associated with a propulsion system of a vehicle are provided. The method includes receiving, by a processor, a concentration of Ethanol in a fuel in the fuel system. The fuel system includes at least two fuel injection systems. The method includes determining, by the processor, a change in the concentration of Ethanol in the fuel exceeds a fuel concentration threshold, and determining, by the processor, the fuel with the change in the concentration of Ethanol has reached a divergence defined between the at least two fuel injection systems. The method includes determining, by the processor, a volume ratio between the at least two fuel injection systems, and outputting one or more control signals, by the processor, to command the at least two fuel injection systems based on the volume ratio.