Vehicle Suspension Control via ECS and ARS Integration
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Solution Overview
Problem
Current vehicle suspension systems, particularly in 4WD vehicles, lack effective control over yaw moment and road conditions, leading to inadequate handling and stability, especially during various driving scenarios and road conditions.
Innovation Solution
A method for controlling the suspension system that integrates an electronic controlled suspension device (ECS) and an active roll stabilizer (ARS) based on input sensor values and driving operations, adjusting control modes according to straight driving, normal turning, and urgent turning, and road conditions, including determining roll control and yaw control moments and distributing them to optimize handling and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If electronic controlled suspension device (ECS) and active roll stabilizer (ARS) are controlled based on simple wheel slip distribution, then device complexity is reduced, but vehicle handling and stability performance deteriorate
Solution Approach 1:
The control system dynamically changes control parameters including damping force coefficients, roll moment coefficients, and force distribution ratios based on driving conditions (straight driving, normal turning, urgent turning) and road conditions (smooth, rough, uneven). This allows the system to optimize vehicle handling and stability for each specific condition while maintaining manageable system complexity through parameter adjustment rather than structural complexity.
Solution Approach 2:
The control system transitions from static force distribution to dynamic force distribution that adapts in real-time to changing driving and road conditions. The system continuously adjusts the control forces applied to front and rear wheels based on detected conditions, enabling the vehicle to maintain optimal handling and stability characteristics across varying operational scenarios.
2Reliability
If electronic controlled suspension device (ECS) applies maximum damping force during vehicle turn, then vehicle handling is improved, but riding impression deteriorates
Solution Approach 1:
The control system adjusts the damping force parameter dynamically based on the specific turning condition. During normal turning, the system applies moderate damping force to maintain handling while preserving riding comfort. During urgent turning, the system increases damping force to prioritize handling stability. This conditional parameter adjustment resolves the contradiction by matching the damping force level to the severity of the turning maneuver.
Solution Approach 2:
The system transitions from applying maximum damping force uniformly during all turns to dynamically adjusting damping force based on the detected turning condition. The control force is modulated in real-time to provide sufficient handling support during urgent turns while maintaining comfort during normal turns, thereby resolving the contradiction between handling performance and riding impression.
3Device complexity
If front and rear driving force is simply distributed according to wheel slip, then control system complexity is reduced, but vehicle behavior control according to various driving conditions deteriorates
Solution Approach 1:
The force distribution system transitions from static allocation based solely on wheel slip to dynamic allocation that responds to detected driving conditions. The control system adjusts the force distribution ratio between front and rear wheels based on the specific driving scenario (straight driving, normal turning, urgent turning) and road conditions, enabling the vehicle to exhibit appropriate behavior for each condition while maintaining reasonable control system complexity.
Solution Approach 2:
The system dynamically changes the force distribution parameter based on driving and road conditions. During straight driving on smooth roads, force is distributed to maintain stability. During turning maneuvers, force distribution is adjusted to support the turning behavior. This conditional parameter adjustment enables versatile vehicle behavior control without requiring excessively complex control logic.
Data Source
AI summary
A method for controlling a suspension system includes controlling an electronic controlled suspension device (ECS) and an active roll stabilizer (ARS) of a vehicle based on an input sensor value and a driving operation of the vehicle, the input sensor value is based on a road condition and wherein the driving operation is one of a straight driving, a normal turning, and an urgent turning of the vehicle.