Lane Keeping Steering Torque Adjustment for Curve Dynamics
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Solution Overview
Problem
Existing driver assistance systems with lane keeping functions complicate sporty driving on inner curves and do not account for reduced steering force requirements on outer curves, leading to increased driver effort and potential safety issues.
Innovation Solution
A driver assistance system that adjusts steering intervention based on lateral acceleration and curve dynamics, providing stronger intervention on outer curves and weaker intervention on inner curves, using a video sensor to detect lane markings and a sensor for lateral acceleration to determine cornering and vehicle position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the lane keeping function applies strong steering torque to keep the vehicle centered in the lane, then lane keeping stability is improved, but driver effort increases when driving on inner curves
Solution Approach 1:
The control device dynamically adjusts the steering torque based on real-time detection of vehicle position within the lane and curvature characteristics. When the vehicle is on an inner curve, the system reduces or deactivates the lane keeping torque to accommodate the natural steering forces, whereas on straight sections or outer curves, full torque is applied to maintain lane centering.
Solution Approach 2:
The system changes the parameter of steering torque magnitude based on detected driving conditions. By monitoring vehicle position relative to lane markings and calculating lateral acceleration, the control device modifies the torque parameter adaptively - applying full torque when appropriate and reducing it when the vehicle is positioned on inner curves to avoid conflicting with natural steering dynamics.
2Ease of operation
If the lane keeping function applies asymmetric steering force to facilitate lane changes, then ease of lane changing is improved, but lane keeping precision deteriorates
Solution Approach 1:
The system applies preliminary counter-steering torque when a lane change intention is detected (e.g., via direction indicator activation). The control device prepares the steering system by applying torque in the opposite direction to the intended lane change, reducing the effort required for the driver to initiate the maneuver while maintaining overall lane keeping precision through subsequent torque adjustments.
3Reliability
If the driver assistance system continuously monitors vehicle position and applies steering torque, then lane keeping reliability is improved, but system complexity increases
Solution Approach 1:
The control device utilizes existing vehicle sensors (camera for lane marking detection, lateral acceleration sensor) and processing units already present in modern vehicles. The system performs self-service by automatically detecting vehicle position, calculating curvature, and adjusting steering torque without requiring additional dedicated hardware, thereby maintaining high reliability while minimizing system complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances driving comfort and safety by reducing unnecessary steering effort on inner curves and ensuring stable lane keeping without additional intervention on outer curves, even at higher speeds.
Implementation Method 1
using a video sensor to detect lane markings and a sensor for lateral acceleration to determine cornering and vehicle position
Implementation Method 2
The support provided by a driver assistance system with a lane guidance function when cornering is achieved by applying a torque to the steering column
Data Source
Figure 1~6
Figure 7~8
AI summary
The invention relates to a driver assistance system comprising a lane-keeping function, which comprises a device for recognising the lanes (2) on the roadway, and a control device for engaging in the steering system of the vehicle (3) in respect of lane-keeping. Means are provided in the driver assistance system in order to detect the position of the vehicle (3) in relation to the marking (2.1, 2.2) of the lane (2). Means are also provided in order to detect cornering of the vehicle (3). Said control device exercises the control function thereof according to the position of the vehicle (3) on the lane (2) and according to cornering. The engagement thereof depends on whether the vehicle is on the inside of the corner or on the outside of the corner.