Fuel Injection Control Device with Real-Time Pressure Feedback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing fuel injection control systems struggle to accurately control fuel injection characteristics due to individual differences in engine components and aging effects, making it difficult to maintain optimal injection patterns over time.
Innovation Solution
A fuel injection control device with a fuel pressure sensing section, a diagram detecting section, and an injection varying section that adjusts injection commands based on detected fuel pressure fluctuations to match a predetermined basic diagram, ensuring appropriate fuel injection control by adjusting injection characteristics in real-time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a map with adaptation values is used to control fuel injection, then fuel supply can be performed in an injection mode suitable for the engine operation state, but individual differences in component characteristics make it difficult to perform control in consideration of all influences
Solution Approach 1:
The patent implements feedback control by detecting actual fuel injection characteristics through pressure sensors and comparing them with target values from maps. The control device calculates correction values based on the difference between actual and target injection characteristics, and applies these corrections to subsequent injection operations. This closed-loop feedback mechanism compensates for individual component differences and maintains precise control across varying engine conditions.
Solution Approach 2:
The patent dynamically changes control parameters by adjusting injection timing, injection pressure, and injection duration based on real-time detection of actual injection characteristics. The control device modifies these parameters using calculated correction values to align actual performance with target specifications, thereby adapting to individual component variations while maintaining overall control precision.
2Measurement precision
If conventional control methods are used, then high accuracy can be obtained in an early stage, but characteristic change resulting from aging makes it difficult to maintain optimum value with passage of time
Solution Approach 1:
The patent employs feedback control that continuously monitors actual fuel injection characteristics throughout the engine's service life. By detecting deviations caused by aging and applying cumulative corrections, the system maintains accurate injection control from initial operation through extended usage periods, compensating for degradation effects.
Solution Approach 2:
The patent performs preliminary detection and correction of injection characteristics at regular intervals during engine operation. By proactively identifying and correcting deviations before they significantly impact performance, the system maintains optimum injection characteristics throughout the engine's service life rather than reacting to degradation after it occurs.
3Productivity
If mass production is performed, then production efficiency is improved, but individual differences in component characteristics occur between engines and cylinders
Solution Approach 1:
The patent uses feedback control to compensate for individual differences in mass-produced components. By detecting actual injection characteristics for each specific engine and cylinder and applying personalized corrections, the system achieves precise control despite variations introduced during mass production, thereby maintaining high productivity without sacrificing control accuracy.
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 device ensures precise and adaptive fuel injection control, accounting for component variations and aging effects, thereby maintaining optimal fuel injection patterns and engine performance over time.
Implementation Method 1
a fuel pressure sensing section which sequentially senses fuel pressure fluctuating with the injection of the injector
Data Source
AI summary
A fuel injection control device (ECU) for controlling injection supply of fuel to a target engine includes a program for sequentially sensing fuel pressure fluctuating with injection of a predetermined injector of each cylinder of a multi-cylinder engine based on an output of a fuel pressure sensor, a program for detecting a diagram as a profile of a transition of a fuel quantity injected from the injector per unit time (i.e., an injection rate) at a present time based on the sequentially sensed fuel pressure transition, and a program for varying an injection command to the injector based on the diagram that is the profile of the injection rate transition and that is detected by the latter program and a predetermined basic diagram such that the diagram as the actual profile of the injection rate transition belongs to the basic diagram.