Variable Damper Cornering Control With Rear-First Damping
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Solution Overview
Problem
Existing vehicle suspension systems face challenges in improving cornering performance without compromising operational stability during vehicle cornering.
Innovation Solution
A control device and method for a damping force variable damper that adjusts damping forces based on lateral acceleration, yaw rate, and vehicle speed, with specific settings for cornering states to prioritize rear wheel intervention and delay front wheel intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the damping force of the front wheel is reduced in the early stages of cornering to improve cornering performance, then the cornering performance is improved, but the operational stability decreases
Solution Approach 1:
The control system segments the wheel intervention into two distinct phases: rear wheel intervention first, then front wheel intervention. This segmentation allows the rear damping force to be increased initially to maintain stability, while the front damping force is reduced later to improve cornering performance, thus resolving the contradiction between cornering performance and operational stability
Solution Approach 2:
The system performs preliminary action by increasing the rear wheel damping force before reducing the front wheel damping force. This preliminary reinforcement of rear wheel stability prevents operational instability from occurring before the cornering performance improvement is implemented, allowing both goals to be achieved in sequence
Data Source
AI summary
Disclosed are a control device and a control method for a damping force variable damper. The control device includes: a damping force setting part setting a damping force target value generated in each damping force variable damper based on lateral acceleration, yaw rate and vehicle speed of the vehicle; a driving current setting part setting a driving current generated in each damping force variable damper based on the damping force target value; and a cornering state judgment part determining the cornering status of the vehicle based on at least one of the lateral acceleration, steering angle, yaw rate and roll angle. When it is determined that the vehicle is in the initial cornering state, the rear wheel damping force target value of the vehicle is set to be higher than the front wheel damping force target value of the vehicle.