Payload-Adaptive Lane Keeping Control to Prevent Vehicle Sliding

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Solution Overview

Problem

Existing driver assistance systems, particularly lane keeping assistance (LKA) functions, face challenges in maintaining stability when the payload of a vehicle varies significantly, such as in commercial vehicles with large cargo loads.

Innovation Solution

A driver assistance system that includes a camera and a controller capable of processing image data to perform lane keeping assistance control. The controller adjusts vehicle speed and auxiliary steering torque based on the vehicle's payload, comparing the vehicle's lateral speed to its critical sliding velocity (CSV) to ensure stability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If the LKA function is applied to a vehicle with greatly varying payload (such as commercial vehicles with large cargo loads), then the vehicle can carry more cargo, but the stability of the LKA function deteriorates

Engineering Contradiction:

Improvecargo load capacityVSAvoidLKA function stability

Core Design Contradiction:

Quantity of substanceVSReliability

Solution Approach 1:

The patent implements dynamic adjustment of LKA control parameters based on real-time payload detection. The system continuously monitors vehicle payload conditions and adapts the auxiliary steering torque characteristics accordingly, transitioning from static to dynamic control to maintain stability across varying cargo loads

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes control parameters (auxiliary steering torque, critical sliding velocity thresholds) based on detected payload conditions. When payload exceeds predetermined thresholds, the system adjusts these parameters to compensate for the reduced stability, effectively adapting the LKA function to different vehicle loading states

Inventive Principle:

Principle #35Parameter changes

2Reliability

If the auxiliary steering torque is increased to maintain lane keeping stability, then the LKA function becomes more effective, but the risk of vehicle sliding increases when payload is high

Engineering Contradiction:

Improvelane keeping stabilityVSAvoidvehicle sliding risk

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent implements a feedback mechanism that continuously monitors vehicle lateral speed and compares it against a critical sliding velocity (CSV). When the lateral speed approaches the CSV threshold, the system provides feedback to reduce the auxiliary steering torque, preventing excessive torque application that could cause vehicle sliding

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent calculates and applies a predetermined correction value to the auxiliary steering torque when high payload conditions are detected. This preliminary anti-action reduces the torque before sliding can occur, proactively preventing the harmful effect rather than reacting after it occurs

Inventive Principle:

Principle #9Preliminary anti-action

Data Source

PatentUS12330640B2Driver assistance system and driver assistance method

Publication Date: 2025.06.17 HL KLEMOVE CORP

AI summary

Disclosed is a driver assistance system including a camera installed in a vehicle, the camera having a field of view around the vehicle and obtaining an image data; and a controller configured to process the image data. The controller performs a lane keeping assistance control for providing an auxiliary steering torque to a steering actuator to maintain a driving lane of a vehicle. The controller changes at least one of a vehicle speed and the auxiliary steering torque depending on a payload of the vehicle during the lane keeping assistance control.