Fuel Injector Opening Delay Determination via Mathematical Model
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Solution Overview
Problem
Current methods for determining the opening delay of fuel injectors in internal combustion engines are inefficient and inaccurate, particularly in systems with solenoid valves, which affects fuel delivery precision and emission control.
Innovation Solution
A method using a mathematical model that incorporates activation duration as an input variable to determine the opening delay, allowing for precise calculation of the opening delay and improving fuel injection accuracy by adapting the model to specific fuel injectors based on manufacturing tolerances and operational conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If current methods are used to determine opening delay, then the determination process is simple, but the accuracy and precision are insufficient
Solution Approach 1:
The patent replaces complex mechanical measurement systems with a mathematical model that calculates opening delay based on activation duration and solenoid characteristics. This substitution of mechanical measurement with mathematical calculation achieves high precision while maintaining simplicity in the determination method.
Solution Approach 2:
The patent uses parameter changes by establishing a mathematical relationship between activation duration and opening delay. By changing the approach from direct measurement to parameter-based calculation, the system achieves accurate opening delay determination without complex measurement apparatus.
2Reliability
If activation duration is extended to ensure complete valve opening, then reliability improves, but the time required for injection increases
Solution Approach 1:
The patent applies preliminary action by pre-calculating the optimal activation duration based on the mathematical model that accounts for opening delay. This allows the system to activate the solenoid for the precise duration needed, ensuring reliable valve opening without unnecessary time extension.
Solution Approach 2:
The patent implements dynamics by making the activation duration adaptive rather than fixed. The system adjusts the activation duration dynamically based on the specific fuel injector characteristics and operating conditions, optimizing both reliability and time efficiency.
3Productivity
If a mathematical model is used to determine opening delay, then calculation speed and precision improve, but the model adaptation complexity increases
Solution Approach 1:
The patent applies universality by developing a mathematical model that can be adapted to different fuel injector types and configurations. The model serves multiple purposes: calculating opening delay, optimizing activation duration, and ensuring reliable operation across various conditions, thereby reducing overall system complexity.
Solution Approach 2:
The patent uses parameter changes in the mathematical model to accommodate different fuel injector characteristics. By adjusting model parameters rather than creating entirely different models, the system achieves high calculation speed and precision while minimizing adaptation complexity.
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 accurate and efficient determination of the opening delay, enhancing fuel delivery precision and reducing emission values by accounting for the physical properties of the fuel injector and operational parameters.
Implementation Method 1
a magnetic high-pressure injector of a direct injection system, a magnet is activated, i.e., energized, its magnetic force moving the valve needle out of its seat
Implementation Method 2
If energized, the armature initially accelerates and then after a small lift, strikes against the valve needle. At the point in time of lift of the valve needle, a mechanical impulse is also acting
Data Source
AI summary
A method is described for determining an opening delay of a fuel injector in which by activating a solenoid with the aid of an armature, a valve needle may be opened wherein a mathematical model is used which includes an activation duration of the solenoid as an input variable and a respective opening delay as an output variable.