Dual-Pathway Engine Torque Arbitration Strategy
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Solution Overview
Problem
Conventional engine control systems are too slow to respond to rapid torque requests from secondary engine systems, leading to inadequate torque control and decreased engine performance and safety.
Innovation Solution
A dual-pathway engine management system that combines slow response air actuation and fast response spark timing control, with the fast response pathway enabled based on an optimization index to prioritize torque responsiveness over efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional air control systems are used to manage torque, then engine torque production is controlled, but the response time is too slow to meet rapid torque requests from secondary systems
Solution Approach 1:
The patent segments the torque control function into two separate control pathways: a fast response pathway using spark timing control for rapid torque adjustments, and a slow response pathway using air intake control for steady-state torque management. This segmentation allows each pathway to be optimized for its specific response characteristics, resolving the contradiction between response speed and control precision.
2Speed
If spark timing is adjusted for fast response torque control, then torque responsiveness is improved, but engine efficiency is reduced
Solution Approach 1:
The patent implements a dynamic control strategy where the fast response pathway (spark timing control) is selectively enabled based on an optimization index that evaluates current engine operating conditions. The system dynamically switches between pathways or combines them based on real-time conditions, allowing spark timing adjustments only when necessary for rapid torque response, thereby minimizing efficiency losses while maintaining responsiveness when needed.
Data Source
AI summary
The present disclosure relates to a system for managing engine output that includes a machine manager module and a combustion module. In one embodiment, the combustion module includes a slow response pathway and a fast response pathway. The slow response pathway includes managing air and fuel actuators and the fast response pathway includes managing spark timing. According to one embodiment, managing spark timing comprises bringing a spark actuator to the middle of a spark timing range for bi-directional control and involves sacrificing engine efficiency for engine responsiveness. Further, the fast response pathway may be selectively enabled based upon an optimization index.