Engine Combustion Control via Cylinder Prediction
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Solution Overview
Problem
Conventional internal combustion engine control systems suffer from reduced performance due to decoupling of air path and fueling commands, which leads to inherent delays and failure to account for changes in engine behavior over time, especially during transient conditions, and require complex calibration and multiple maps to manage off-nominal considerations.
Innovation Solution
The system dynamically controls fueling based on instantaneous cylinder conditions, incorporating a feedback mechanism to adjust for air path system variability and response time delays, using a cylinder contents prediction module and fueling parameter selection module to generate fuel commands from weighted combinations of nominal and peak fueling parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If decoupled feed-forward air path and fueling commands are used, then control simplicity is maintained, but performance deteriorates due to inherent delays and inability to account for engine behavior changes
Solution Approach 1:
The patent implements a feedback mechanism where the air path system performance is monitored and used to dynamically adjust fueling commands. The feedback signal from the air path system is processed by the fueling controller to modify fueling parameters in real-time, closing the control loop and enabling the system to adapt to changing engine conditions and delays.
2Adaptability or versatility
If multiple two-dimensional feed-forward maps are used to account for off-nominal considerations, then adaptability improves, but device complexity and calibration difficulty increase
Solution Approach 1:
The patent employs dynamic fueling commands that are continuously adjusted based on real-time engine operating conditions and air path system performance. Instead of relying on static pre-programmed maps for various conditions, the system dynamically calculates optimal fueling parameters using current sensor data, making the control strategy adaptable to any operating condition without requiring extensive pre-calibration.
3Device complexity
If air path system alone is used to correct variability through feedback, then fueling control is simplified, but performance deteriorates due to lack of coordinated fueling adjustment
Solution Approach 1:
The patent merges the air path feedback mechanism with coordinated fueling control. The fueling controller receives and processes the feedback signal from the air path system, and integrates this information with fueling parameters to generate coordinated adjustments. This combination ensures that both air path and fueling systems work together synergistically to optimize performance under varying conditions.
Data Source
AI summary
According to one embodiment, an apparatus for controlling combustion in an internal combustion engine having a fuel delivery system includes a cylinder contents prediction module configured to predict at least one condition within a combustion cylinder of the internal combustion engine. The apparatus also includes a fueling parameter selection module configured to generate a fuel command for the fuel delivery system. The fuel command is based at least partially on the predicted at least one condition within the combustion cylinder.