Driver Assistance Torque Release Control for Comfort and Stability
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Solution Overview
Problem
Existing driver assistance systems cause discomfort and unstable vehicle behavior when control torque is lowered uniformly upon release, necessitating a method to adjust torque lowering speed based on situational requirements.
Innovation Solution
A method and apparatus that differentiate between first and second control torque lowering modes, adjusting speed based on driver steering torque, lateral acceleration, and hands-on status to minimize discomfort and maintain stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If control torque is lowered uniformly upon system release, then the system operation is simple, but driver discomfort increases and vehicle stability deteriorates
Solution Approach 1:
The control torque lowering speed is made dynamic rather than fixed. The system adjusts the torque lowering speed based on real-time detection of driver steering torque and hands-on status, transitioning between first lowering mode (slower) and second lowering mode (faster) to optimize both driver comfort and system responsiveness.
Solution Approach 2:
The system changes the control parameter (torque lowering speed) based on detected conditions. When driver steering torque exceeds a threshold or hands-on status changes, the system switches between different torque lowering speed parameters, allowing adaptive adjustment without complex mechanical structures.
2Object-affected harmful factors
If control torque lowering speed is increased to reduce discomfort, then driver comfort improves, but vehicle stability may be compromised
Solution Approach 1:
The system dynamically adjusts torque lowering speed based on real-time conditions. By detecting driver steering torque and hands-on status, the system applies faster lowering (second mode) when appropriate and slower lowering (first mode) when stability is Concern, achieving both comfort and stability through conditional adaptability.
Solution Approach 2:
Different torque lowering speeds are applied based on local conditions (driver input level, hands-on status). The system doesn't apply a uniform approach but rather tailors the torque lowering characteristic to the specific situation, providing fast lowering when needed for comfort and slow lowering when stability is prioritized.
3Object-affected harmful factors
If situation-based torque adjustment is implemented, then driver comfort and stability improve, but system complexity increases
Solution Approach 1:
The system achieves situation-based adjustment through parameter changes rather than complex mechanical structures. By modifying the control torque lowering speed parameter based on detected conditions (steering torque threshold, hands-on status), the system provides adaptive performance with minimal additional hardware complexity.
Solution Approach 2:
The patent replaces complex mechanical adjustment mechanisms with electronic control and sensor-based detection. The controller adjusts torque lowering speed through software logic that monitors driver input, substituting mechanical complexity with electronic sensing and control algorithm simplicity.
Data Source
AI summary
A method and an apparatus for adjusting control torque of a driver assistance system are provided, and the method for adjusting control torque of the driver assistance system according to an embodiment of the present disclosure comprises: operating the driver assistance system; when the driver assistance system is released, determining whether a second control torque lowering mode, which is a control torque lowering mode with a faster control torque lowering speed than a first control torque lowering mode, is required; adjusting the control torque lowering speed based on whether the second control torque lowering mode is required; and controlling the vehicle based on the adjusted control torque lowering speed.