Hybrid Controller System Remedial Action Ring
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Solution Overview
Problem
Hybrid electric vehicles (HEVs) require a system that can effectively monitor, detect, and respond to system failures, selecting and executing remedial actions to ensure safe operation, especially in 'limp home modes' where full controller availability is not guaranteed.
Innovation Solution
A System Remedial Action Ring (SRAR) routine within a hybrid controller (HC) that coordinates remedial actions, includes selection and calibration, logic, and monitoring functions to prioritize and execute necessary actions, ensuring safe system behavior by detecting failures, selecting appropriate remedial actions, and generating output messages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the HEV operates without full controller availability, then the vehicle can continue to operate in limp home modes, but system reliability and safety cannot be ensured
Solution Approach 1:
The system performs preliminary detection of controller availability and failure conditions before critical failures occur. The SRAR routine continuously monitors system status and pre-selects appropriate remedial actions based on detected failures, ensuring safety measures are ready before they are needed during limp home operation.
Solution Approach 2:
The system implements continuous feedback monitoring of controller availability and system state during limp home modes. The SRAR routine receives feedback about failure conditions and adjusts remedial actions accordingly, ensuring that safety requirements are maintained throughout the degraded operation until the vehicle reaches a service location.
2Reliability
If multiple remedial actions are executed simultaneously, then system failures are addressed comprehensively, but coordination complexity increases
Solution Approach 1:
The SRAR routine segments the remedial action coordination into distinct functional modules: detection functions identify failures, selection functions choose appropriate remedial actions from predefined sets, and execution functions implement the selected actions. This segmentation allows multiple remedial actions to be coordinated systematically without overwhelming complexity.
Solution Approach 2:
The system dynamically adjusts the coordination of remedial actions based on the specific failure conditions detected. The SRAR routine can prioritize certain actions over others, execute actions in sequences, or modify remedial action selections as system state changes during limp home operation, providing flexible coordination that adapts to varying failure scenarios.
Data Source
AI summary
A hybrid electric vehicle (HEV) employing a hybrid system using both an internal combustion engine and a second motor/generator as a propelling power source for vehicle propulsion, and also employing a first generator driven by the engine for power generation, an integrated HEV control system is provided to control the engine, and the first and second motor/generators. The integrated HEV control system is also operable for detecting the presence of system failures and thereafter selecting at least one remedial action responsive to the system failures such that the system failures are corrected or minimized. The selected remedial action is also verified as being appropriate, monitored and thereafter executed.