Vehicle Mode Transition Control for Manual-to-Autonomous Handover
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Solution Overview
Problem
When transitioning from manual driving to automated driving mode, vehicles may become immobile if the shift range is not in the parking range and the automated driving system fails to initiate control, leading to confusion between manual and standby modes.
Innovation Solution
A vehicle control device with a processor that manages transitions between manual driving, automated driving, and standby modes, including unknown, pure manual, pre-standby, and standby states, ensuring the vehicle remains operational by detecting driver intention and adhering to specific conditions for mode changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the vehicle transitions to standby mode after manual driving starts when shift range is not in parking range, then automated driving mode transition is blocked, but the vehicle becomes immobile and cannot respond to operator operations
Solution Approach 1:
The system performs preliminary validation of shift range position before allowing transition to standby mode. The processor checks whether the shift range is in the parking range (P range) before enabling the standby mode transition, preventing the problematic state from occurring in the first place
Solution Approach 2:
The system continuously monitors the shift range position and provides feedback to the mode transition logic. When the shift range is detected to be outside the parking range, the system prevents transition to standby mode and maintains the vehicle in a state where manual operations remain responsive
2Adaptability or versatility
If the vehicle allows transition to standby mode without checking shift range position, then mode transition flexibility is improved, but confusion between manual and automated driving modes occurs
Solution Approach 1:
The system performs preliminary validation of shift range position before allowing transition to standby mode. The processor checks whether the shift range is in the parking range (P range) before enabling the standby mode transition, preventing the problematic state from occurring in the first place
Solution Approach 2:
The system continuously monitors the shift range position and provides feedback to the mode transition logic. When the shift range is detected to be outside the parking range, the system prevents transition to standby mode and maintains the vehicle in a state where manual operations remain responsive
3Reliability
If the vehicle requires shift range to be in parking range for standby mode transition, then automated driving safety is improved, but the system complexity increases due to additional transition states
Solution Approach 1:
The manual driving mode is segmented into three distinct states: unknown state, pure manual state, and pre-standby state. This segmentation allows the system to track the transition process from manual to automated driving, enabling safety checks at appropriate transition points while maintaining clear state definitions
Solution Approach 2:
The system performs preliminary validation of shift range position before allowing transition to standby mode. The processor checks whether the shift range is in the parking range (P range) before enabling the standby mode transition, preventing the problematic state from occurring in the first place
Data Source
AI summary
A vehicle control device is a vehicle control device that is connected between an automated driving system and a vehicle platform that performs automated driving according to commands from the automated driving system, and includes: a memory that stores a program and a memory that executes the program; and a processor that interfaces between the autonomous driving system and the vehicle platform. When the processor receives a manual startup command in the unknown state, it transitions to the pure manual state, and when it receives a startup command from the automated driving system in the unknown state, it transitions to the pre-standby state, and in the pre-standby state, it transitions to standby mode. When the transition conditions are met, the system transitions to standby mode, and when the driver's driving intention is detected in the pre-standby state, the system transitions to pure manual state.