Fuel Injection Control Device with Adaptive Learning Frequency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing fuel injection control systems fail to accurately correct injection amount variations due to individual differences and deterioration of fuel injection valves, leading to fluctuations in torque, reduced fuel efficiency, and increased engine vibration, especially when individual difference learning is not performed frequently enough.
Innovation Solution
A fuel injection control device and method that includes a deterioration determination unit, an injection amount learning unit, and a learning frequency change unit to adjust the learning frequency based on the deterioration state of the fuel injection valve, allowing for real-time correction of injection amounts and improved control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If individual difference learning is performed once after engine start, then the injection amount can be corrected for individual differences, but the injection amount cannot be corrected when learning conditions are not established, leading to torque fluctuation and fuel efficiency deterioration
Solution Approach 1:
The patent implements periodic individual difference learning at fixed intervals (every 5000 km or 6 months) regardless of whether learning conditions are currently established. This periodic action ensures that learning is performed systematically over time, preventing torque fluctuations and fuel efficiency deterioration that would occur if learning only happened when conditions were perfect. The control unit stores individual difference data and updates it periodically, ensuring continuous correction capability.
Solution Approach 2:
The patent performs individual difference learning in advance at predetermined intervals even before deterioration symptoms appear. By proactively updating the individual difference data at scheduled intervals, the system ensures that correction information is available before it is needed, preventing torque fluctuations and maintaining fuel efficiency rather than waiting for problems to occur.
2Measurement precision
If individual difference learning is performed only when learning conditions are established, then the learning accuracy can be maintained, but the learning frequency is insufficient to track deterioration, leading to increased variation in injection amount
Solution Approach 1:
The patent establishes a periodic learning schedule that performs individual difference learning at fixed intervals (every 5000 km or 6 months). This periodic action ensures that learning occurs frequently enough to track deterioration while maintaining measurement accuracy through proper learning conditions. The system balances the need for frequent updates with the requirement for accurate measurements.
Solution Approach 2:
The patent implements a feedback mechanism where the control unit stores individual difference data learned at periodic intervals and applies this data to correct injection amounts in real-time operations. The feedback loop continuously updates the individual difference characteristics based on periodic learning results, ensuring that injection amount consistency is maintained despite deterioration over time.
3Adaptability or versatility
If half lift control is used to reduce minimum injection amount, then the dynamic range of the fuel injection valve is expanded, but the variation in injection amount increases due to individual differences in the half lift area
Solution Approach 1:
The patent uses feedback from individually learned characteristics to correct injection amounts in the half lift area. By storing and applying individual difference data specific to each fuel injection valve, the system compensates for variations that occur in the half lift region, maintaining precision while enabling the expanded dynamic range provided by half lift control.
Solution Approach 2:
The patent changes the control parameter from fixed injection timing to variable injection timing based on learned individual characteristics. By adjusting the injection timing parameter according to individually learned data, the system compensates for variations in the half lift area, maintaining consistent injection amounts across different valves while preserving the benefits of expanded dynamic range.
Data Source
AI summary
The present invention provides a high-efficiency and highly-reliable fuel injection control device that controls a fuel injection valve of an internal combustion engine and can perform injection amount control in accordance with a deterioration degree of the fuel injection valve. A fuel injection control device controlling a fuel injection valve of an internal combustion engine includes a deterioration determination unit that determines a deterioration state of the fuel injection valve, an injection amount learning unit that learns the injection amount of the fuel injection valve, and a learning frequency change unit that changes the learning frequency of the injection amount learning unit in accordance with the deterioration state of the fuel injection valve.