Injection Valve Closing Time Detection Using Averaged Reference Curves
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Solution Overview
Problem
Existing methods for determining the closing time of an injection valve in internal combustion engines are complex and require significant hardware, making them inefficient for precise fuel injection control in modern engines.
Innovation Solution
A method involving the arithmetic linkage of averaged reference curves with measurement curves, allowing for real-time sampling and digitization, and immediate evaluation of local maxima or minima to determine the closing time, reducing the need for complete curve recording and storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If complex hardware methods are used to determine closing time, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent replaces complex hardware-based measurement systems with a mathematical evaluation method. By using arithmetic linkage between reference curves and measurement curves, followed by detection of local maxima or minima, the system achieves precise closing time determination through software-based signal processing rather than complex hardware circuits.
Solution Approach 2:
The patent creates a reference curve that represents the ideal or average behavior of the injection valve system. This reference curve is then arithmetically linked with actual measurement curves to identify deviations and determine closing time, effectively using a copied/derived model to simplify the measurement process.
2Measurement precision
If complete curve recording is performed before evaluation, then measurement precision is improved, but loss of time increases
Solution Approach 1:
The patent performs preliminary actions by pre-calculating and storing the reference curve before actual measurements are taken. This reference curve can then be immediately applied to new measurement curves as they arrive, enabling real-time or near-real-time evaluation without waiting for complete data collection.
Solution Approach 2:
The patent enables dynamic evaluation by processing measurement curves as they are generated rather than waiting for complete recording. The arithmetic linkage operation can be performed incrementally on incoming data, allowing the system to adapt and provide results in real-time while maintaining measurement precision.
3Measurement precision
If multiple reference curves are stored for averaging, then measurement precision is improved, but storage volume increases
Solution Approach 1:
The patent performs the averaging operation in advance during the creation of the reference curve. By pre-processing multiple reference curves into a single averaged reference curve before actual measurements, the system achieves the precision benefits of multiple references without the ongoing storage burden of keeping all individual curves.
Solution Approach 2:
The patent discards individual reference curves after they have been used to create the averaged reference curve. The individual curves are temporarily stored during the averaging process, then discarded once the averaged reference curve is established, recovering storage space while maintaining measurement precision.
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
Enables efficient and accurate determination of the closing time, reducing hardware requirements and providing results earlier, with improved accuracy and reduced storage needs, facilitating precise fuel injection control.
Implementation Method 1
the time course of the build-up and decay of the magnetic field of the coil of the injector, which actuates the valve needle of the injector
Implementation Method 2
Due to the movement of the armature, a voltage induction is triggered in the coil. The maximum induction voltage that occurs here characterizes the maximum speed of the magnet armature.
Data Source
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AI summary
The invention relates to a method for determining an event using a reference curve and a measurement curve, wherein the reference curve and the measurement curve are arithmetically linked to form a linked curve, and an event is determined from the result by detecting a local maximum. According to the invention, several reference curves are recorded and averaged to form an averaged reference curve. The measurement curve is sampled and digitized in real time, with the arithmetic linking being performed immediately after each sampling and digitization of the measurement curve for each individual sampling point before the entire sampling and digitization process is completed, and the local maximum of the arithmetically linked curve is determined before the sampling and digitization of the measurement curve is finished.Furthermore, the invention relates to a testing system for testing a component.