Integrated Suspension Control for Ride Comfort and Stability
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Solution Overview
Problem
Existing vehicle suspension systems face challenges in balancing riding quality and traveling stability, as a low damping force improves riding quality but compromises stability, while high damping force enhances stability at the expense of absorbing road vibrations, making it difficult to satisfy both simultaneously.
Innovation Solution
A vehicle integrated control method and system that integrates in-wheel systems with electronic control suspension (ECS) to actively control damping forces, determining control modes based on road and vehicle status to optimize riding quality without altering ESC capacity, using modules for road surface, vehicle status determination, and integrated control mode determination to adjust damping forces and vertical components of force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a suspension with low damping force is used, then riding quality is improved, but traveling stability is reduced
Solution Approach 1:
The patent applies dynamics by making the damping force adjustable rather than fixed. The electronic control suspension system dynamically changes damping force based on driving conditions (sudden acceleration, braking, turning, or normal driving), allowing the suspension to adapt between soft (for comfort) and hard (for stability) states, thus resolving the contradiction between riding quality and traveling stability
Solution Approach 2:
The patent changes the damping force parameter based on detected driving conditions. When sudden acceleration, braking, or turning is detected, the damping force is increased to improve stability; when normal driving is detected, the damping force is decreased to improve riding quality. This parameter adjustment resolves the contradiction by allowing the system to optimize for different operational requirements
2Stability of the object's composition
If a suspension with high damping force is used, then traveling stability is improved, but riding quality is deteriorated
Solution Approach 1:
The system dynamically adjusts damping force based on actual driving conditions rather than maintaining a fixed high damping force. This allows the suspension to provide high damping force only when stability is needed (during sudden maneuvers) and low damping force when comfort is prioritized (during normal driving), resolving the contradiction
Solution Approach 2:
The damping force parameter is changed based on driving condition detection. The system increases damping force parameter when stability is required and decreases it when riding quality is prioritized, allowing the system to achieve both stability and comfort at different times rather than forcing a permanent compromise
Data Source
AI summary
A vehicle integrated control method includes determining a road surface status, determining a vehicle status, determining an integrated control mode by determining a control status of an electronic control suspension and a motion of a sprung mass and an unsprung mass based on the determination results of the road surface status and the vehicle status, and controlling the electronic control suspension and an in-wheel system by determining a control amount based on the determined integrated control mode.