Asymmetrical Servo-Assistance Torque for Driver Guidance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current electronic driver assistance systems in road vehicles do not help drivers approach the vehicle's limits safely, as they autonomously intervene without providing guidance on how to do so, and lack the ability to suggest how to safely reach the vehicle's performance limits without exceeding them.
Innovation Solution
A method that uses a steering system with a servo-assistance device and electronic control unit to provide asymmetrical servo-assistance torque to the steering wheel, suggesting steering adjustments to the driver to safely approach the vehicle's limits by maximizing driving speed and stability while keeping the driver in full control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If autonomous intervention systems are used to correct driving mistakes, then vehicle safety is improved, but the driver loses control and receives no guidance on how to safely approach vehicle limits
Solution Approach 1:
The system introduces an intermediary torque signal that mediates between the driver's steering input and the vehicle's actual steering response. This intermediary torque provides guidance suggestions to the driver through the steering wheel, enabling the driver to safely approach vehicle limits while maintaining full control and awareness of the vehicle's behavior
Solution Approach 2:
The system implements feedback by continuously monitoring driver steering actions and vehicle state, then providing corrective torque signals back to the steering wheel. This feedback loop guides the driver on how to safely approach vehicle limits without autonomous intervention, maintaining driver control while improving safety
2Ease of operation
If asymmetrical servo-assistance torque is applied to guide steering, then driver guidance is improved, but steering system complexity increases
Solution Approach 1:
The system merges the driver assistance function with the existing servo-assistance steering system. By combining the guidance torque generation with the existing power steering mechanism, the system provides driver guidance without requiring separate complex hardware, thus improving ease of operation while minimizing increases in device complexity
3Stability of the object's composition
If autonomous control takes place of driver steering, then vehicle stability is improved, but driver engagement and control are reduced
Solution Approach 1:
The system applies partial action by providing only the necessary guidance torque to help the driver maintain stability, rather than taking full control. The servo-assistance torque is calibrated to suggest corrective steering actions without completely overriding the driver's input, thus improving vehicle stability while maintaining driver engagement and control
Data Source
AI summary
A method for the driver assistance of a road vehicle; the assistance method comprises the steps of: determining an actual steering angle of the front wheels; determining a desired steering angle of the front wheels; and changing the servo-assistance torque applied by a servo-assistance device to a steering system based on the actual steering angle and on the desired steering angle, so that the servo-assistance torque that is applied when a steering wheel is rotated in a first direction to change the actual steering angle causing it to approach the desired steering angle is greater than the servo-assistance torque that is applied when the steering wheel is rotated in a second direction, which is opposite to the first direction, to change the actual steering angle causing it to distance itself from the desired steering angle.