Ignition Advance Control for Exhaust Thermal Protection
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Solution Overview
Problem
Existing methods for controlling internal combustion engines in vehicles fail to simultaneously optimize fuel consumption, driving pleasure, performance, pollutant emission minimization, mechanical and thermal resistance, and driver safety, often requiring prioritization of constraints which can lead to suboptimal engine management.
Innovation Solution
A control method that transforms engine torque setpoints into ignition advance setpoints, calculating minimum and maximum ignition advance setpoints, and dynamically adjusting based on thermal state, thermal damage occurrences, and user safety conditions to ensure optimal thermal protection and compliance with torque demands while maintaining driving comfort and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the ignition advance setpoint is reduced to comply with low torque demand from the programmed electro-stabilizer, then the torque demand is met, but the thermal resistance of the exhaust line deteriorates
Solution Approach 1:
The control system dynamically adjusts the ignition advance setpoint based on real-time thermal state monitoring of the exhaust line. When thermal damage risk is detected, the system adaptively modifies the ignition timing to prevent thermal damage, and can restore the setpoint when the thermal state improves, creating a dynamic response to thermal conditions
Solution Approach 2:
The system implements a feedback mechanism by monitoring the thermal state of the exhaust line and using this information to adjust the ignition advance setpoint. The control unit receives thermal state information and modifies the ignition timing accordingly, creating a closed-loop control system that balances torque demand with thermal protection
2Temperature
If the minimum ignition advance setpoint is maintained to protect exhaust line elements, then thermal resistance is improved, but compliance with torque setpoint deteriorates
Solution Approach 1:
The system dynamically adjusts the ignition advance setpoint based on real-time thermal state monitoring of the exhaust line. When thermal damage risk is detected, the system adaptively modifies the ignition timing to prevent thermal damage, and can restore the setpoint when the thermal state improves, creating a dynamic response to thermal conditions
Solution Approach 2:
The system implements a feedback mechanism by monitoring the thermal state of the exhaust line and using this information to adjust the ignition advance setpoint. The control unit receives thermal state information and modifies the ignition timing accordingly, creating a closed-loop control system that balances torque demand with thermal protection
3Productivity
If multiple constraints are simultaneously optimized, then overall performance improves, but system complexity increases
Solution Approach 1:
The control unit integrates multiple constraint evaluations (torque demand, thermal state, safety conditions) into a single unified control decision-making process. By combining these constraints into one control algorithm, the system manages multiple objectives without requiring separate complex subsystems for each constraint
Data Source
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AI summary
The invention relates to a method (1) for controlling an internal combustion engine fitted to a motor vehicle. The control method (1) comprises a step (5) of converting at least one engine torque reference (3) into an ignition advance reference (C). The control method (1) comprises a first step (6) of calculating a minimum ignition advance reference (Cmin). The control method (1) comprises a step (8) of suppressing the minimum ignition advance reference (Cmin).