Fuel Injection Valve Control Device for Precise Delay Compensation
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Solution Overview
Problem
Conventional internal combustion engine control devices fail to accurately control the valve-close delay time of fuel injection valves, leading to inconsistent fuel injection and increased fuel consumption due to the deterioration of spring components over time, which affects the valve-open time and results in excess fuel injection.
Innovation Solution
An internal combustion engine control device that acquires the valve-close delay time, computes a first learning value when specific learning conditions are met, and a second learning value irrespective of these conditions, to determine the learning state and adjust the valve-open time, thereby improving fuel injection precision and reducing excess fuel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the valve-close delay time is not accurately controlled, then the fuel injection quantity becomes inconsistent and fuel consumption increases, but implementing accurate control requires complex learning mechanisms and computation
Solution Approach 1:
The patent segments the learning value computation into two distinct parts: a first learning value computed only when specific learning conditions are met, and a second learning value computed continuously regardless of conditions. This segmentation allows the system to maintain high measurement precision through conditional learning while managing complexity by separating computation responsibilities.
Solution Approach 2:
The patent implements preliminary action by computing the first learning value in advance when learning conditions are satisfied (such as when the fuel injection valve is newly installed or replaced). This pre-computed learning value is then stored and used for subsequent control operations, eliminating the need for continuous complex computations and reducing real-time control complexity.
2Manufacturing precision
If the valve-open time is not adjusted based on valve-close delay time, then fuel injection precision deteriorates and excess fuel is injected, but implementing adjustment requires continuous learning computation
Solution Approach 1:
The patent applies dynamics by making the computation of the first learning value conditional rather than static. The learning computation is dynamically activated only when specific conditions are met (such as learning conditions being satisfied), while the second learning value provides continuous baseline computation. This dynamic approach ensures fuel injection precision is maintained through conditional learning while improving computation efficiency by avoiding unnecessary continuous computations.
3Measurement precision
If learning conditions are always required, then learning accuracy improves, but learning response time increases and excess fuel injection occurs during transient states
Solution Approach 1:
The patent introduces the second learning value as an intermediary that continuously computes the learning value regardless of learning conditions. This intermediary learning value serves as a baseline or fallback mechanism that ensures learning response during transient states, while the first learning value provides enhanced accuracy when conditions are favorable. The dual-learning-value mechanism mediates between accuracy requirements and response time needs.
Solution Approach 2:
The patent implements partial action by having the second learning value compute continuously (excessive computation in some sense) to ensure learning response, while the first learning value provides enhanced accuracy only when conditions permit (partial computation). This approach ensures that learning never stops, preventing excess fuel injection during transient states, while still achieving high accuracy when learning conditions are satisfied.
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 solution enables precise control of the valve-open time, enhancing fuel injection quantity management, improving exhaust gas characteristics, and reducing fuel consumption by accurately reflecting the valve-close delay time and promoting learning of the valve-close delay time.
Implementation Method 1
a voltage applied to a magnetic coil during operation of the fuel injection valve is detected as an actuator voltage
Data Source
AI summary
An internal combustion engine control device to control a fuel injection valve includes: valve-close delay time acquisition circuitry configured to acquire a valve-close delay time of the fuel injection valve; first learning value calculation circuitry configured to calculate a first learning value based on the valve-close delay time when a running state of an internal combustion engine satisfies a predetermined learning condition; valve-open time calculation circuitry configured to calculate a valve-open time of the fuel injection valve based on the first learning value; second learning value calculation circuitry configured to calculate a second learning value based on the valve-close delay time irrespective of the running state of the internal combustion engine; and learning state determination circuitry configured to determine a learning state of the first learning value based on a relationship between the first learning value and second learning value.