Vehicle Turn Signal Automatic Deactivation via Steering Feedback
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Solution Overview
Problem
Existing automatic control systems for vehicle turn signals cannot easily deactivate chronologically limited turn signals before the end of the specified time interval, leading to confusion for other road users if a vehicle operator decides against a lane change during activation.
Innovation Solution
Integrating a function that uses a steering wheel turning angle sensor to monitor steering movements and automatically deactivate the turn signal if no corresponding lane change is made within a specified time, allowing for counter-steering or lack of steering movement to indicate cancellation of the lane change intention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a chronologically limited turn signal is activated, then the turn signal remains activated for a specified time interval to indicate lane change intention, but it cannot be easily deactivated before the end of the time interval causing confusion for other road users
Solution Approach 1:
The system continuously monitors the steering wheel angle sensor during the measurement interval to detect actual steering movements. This feedback mechanism allows the control unit to determine whether the driver is actually executing the indicated lane change by comparing the steering input against the activated turn signal direction, enabling automatic deactivation when the lane change is aborted or completed.
Solution Approach 2:
The turn signal system automatically deactivates itself based on detected steering movements without requiring manual intervention from the driver. The control unit self-regulates the turn signal duration by monitoring whether the steering wheel movement corresponds to the indicated direction, eliminating the need for the driver to manually cancel the turn signal when changing their mind about the lane change.
2Ease of operation
If the turn signal is manually deactivated by the vehicle operator, then the turn signal can be stopped at any time, but this requires additional manual operation and attention from the driver
Solution Approach 1:
The system automatically manages the turn signal deactivation based on detected steering movements, eliminating the need for the driver to manually intervene. The control unit monitors the steering wheel angle sensor and automatically stops the turn signal when it detects that the driver is not executing the indicated lane change, freeing the driver from additional manual operations and attention requirements.
3Extent of automation
If a timer is used for chronologically limited activation, then the turn signal duration is automatically controlled, but the system cannot adapt to actual driving intentions when the driver changes their mind
Solution Approach 1:
The system combines automatic timer control with real-time feedback from the steering wheel angle sensor. During the measurement interval, the control unit continuously monitors whether the driver's steering movements match the indicated turn signal direction. This feedback allows the system to adapt the turn signal duration dynamically - deactivating early if the driver aborts the lane change or confirming the full duration if the lane change is executed as indicated.
Solution Approach 2:
The turn signal duration transitions from a fixed chronological limit to a dynamic duration that adapts based on actual driver behavior. The system monitors steering wheel movements in real-time and adjusts the turn signal activation period accordingly, making the system flexible and responsive to changing driver intentions rather than rigidly adhering to a predetermined time interval.
Data Source
AI summary
A method for automatically controlling a direction of travel indicator of a vehicle having the following steps: receiving a signal for the chronologically limited activation of the direction of travel indicator, chronologically limited activation of the direction of travel indicator after reception of the signal for the chronologically limited activation of the direction of travel indicator, starting a timer for a measurement interval after reception of the signal for the chronologically limited activation of the direction of travel indicator, checking a steering angle measurement signal during the measurement interval, and deactivation of the direction of travel indicator as a function of the checking of the steering angle measurement signal.