Active Chassis Control for Vehicle Cornering Comfort
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Solution Overview
Problem
Existing motor vehicle cornering systems often result in uncomfortable lateral accelerations for occupants and require manual countersteering, as active rolling during cornering affects cornering behavior unfavorably, necessitating a solution to enhance driving comfort and maintain natural steering behavior.
Innovation Solution
A method and device that determine the lateral acceleration of a motor vehicle, adjust the active chassis to achieve a desired lateral inclination, and intervene in the steering system to compensate for yaw movements caused by active rolling, thereby reducing unpleasant lateral accelerations and maintaining unchanged steering behavior during cornering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If actuators adjust vertical wheel position to achieve active rolling, then lateral accelerations are reduced, but the axles operate at unfavorable operating points
Solution Approach 1:
The system dynamically changes the operating parameters of the suspension actuators by adjusting the vertical wheel positions to achieve desired active roll angles. The control device calculates appropriate actuator commands that achieve the target roll angle while considering the relationship between roll angle and lateral acceleration, thereby optimizing the operating point of the axles during cornering maneuvers
2Manufacturing precision
If manual countersteering is required to compensate for active rolling effects, then cornering accuracy is maintained, but driver workload increases
Solution Approach 1:
The steering actuator system performs self-service by automatically generating and applying the countersteering moments needed to compensate for active rolling effects. The control device continuously monitors the active roll angle and calculates the required compensating steering input, which the actuator then applies without driver intervention, thereby maintaining cornering accuracy while eliminating the need for manual countersteering
Data Source
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AI summary
The method involves determining the lateral acceleration of the motor vehicle (10) and defining the target lateral inclination of the motor vehicle in dependence on the determined lateral acceleration. An actuator of an active undercarriage device of the motor vehicle is adjusted. An independent claim is also included for a device for influencing the cornering ability of a motor vehicle.