Steering Control Device for Automatic Driving Mode Transition
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Solution Overview
Problem
When automatic driving mode is cancelled and switched to manual driving mode, vehicles may unintentionally travel in unintended directions due to non-zero steering angles, posing safety risks if drivers are unaware of the existing steering angles.
Innovation Solution
A steering control device with a steering control unit, cancellation instruction detection unit, and steering angle reduction unit that detects cancellation instructions and vehicle stops to reduce the steering angle to zero, ensuring safe transitions from automatic to manual driving.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the steering angle is maintained at a non-zero value during mode transition, then the vehicle can continue along the intended automatic driving route, but the vehicle may travel in an unintended direction when manual driving begins without driver awareness
Solution Approach 1:
The system performs preliminary action by detecting the cancellation instruction before the mode transition is complete and proactively reducing the steering angle to zero during the transition period. This preliminary adjustment ensures that when manual driving begins, the steering wheel is already in the neutral position, preventing unintended vehicle movement and enhancing safety without requiring driver awareness of the intermediate state.
2Reliability
If the steering angle is reduced to zero when cancellation instruction is detected, then the vehicle safety is improved, but the vehicle may not continue along the intended route smoothly
Solution Approach 1:
The system executes preliminary action by reducing the steering angle to zero during the mode transition before manual driving begins. This timing ensures that the vehicle is safely positioned and the steering is neutralized, allowing the driver to take full control. The preliminary adjustment prioritizes safety over continuous route following, as the driver can then make any necessary corrections to maintain the intended travel path.
Data Source
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Figure 3A~3C
AI summary
A steering control device (1) that can set and cancel an automatic driving mode includes a steering control unit (5), a cancellation instruction detection unit (3), a stop detection unit (3), and a steering angle reduction unit (5). The steering control unit (5) controls a steering angle in the automatic driving mode so that a vehicle travels along an intended route. The cancellation instruction detection unit (3) detects a cancellation instruction to cancel the automatic driving mode. The stop detection unit (3) detects a stop of the vehicle. The steering angle reduction unit (5) reduces the steering angle set by the steering control unit, if the cancellation instruction detection unit detects the cancellation instruction and the stop detection unit detects the stop of the vehicle.