Integrated Chassis Control for Forward Collision Avoidance
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Solution Overview
Problem
In integrated control systems of electronic chassis, such as AWD, ESC, and MDPS, control strategies may conflict, limiting emergency avoidance and safety control operations, particularly in forward collision scenarios, leading to compromised vehicle safety and stability.
Innovation Solution
An integrated control method that determines a forward collision situation and applies a three-grade emergency flag (Emergency Flg 1, 2, 3) to consistently control ECS, MDPS, and AWD, optimizing cooperative performance by adjusting damping forces, steering assist torque, and torque distribution to ensure safe avoidance without conflicting with individual stability control strategies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If individual auxiliary chassis systems (AWD, ESC, MDPS, ECS) are constructed separately with their own control strategies, then each system can optimize its specific function, but control conflicts occur during emergency avoidance operations
Solution Approach 1:
The patent merges multiple individual auxiliary chassis systems (AWD, ESC, MDPS, ECS) into an integrated electronic chassis control system. The integrated controller coordinates these subsystems to work together during emergency avoidance operations, ensuring control consistency while maintaining the individual optimization capabilities of each system through unified emergency avoidance control signals.
2Speed
If ECS performs emergency avoidance control by adjusting damping force, then forward collision avoidance performance is improved, but it may conflict with stability control operations of AWD, ESC, and MDPS
Solution Approach 1:
The patent implements dynamic control coordination where the integrated controller adjusts the operating modes of different subsystems based on real-time vehicle conditions. During emergency avoidance, the ECS adjusts damping force dynamically while the controller simultaneously coordinates AWD, ESC, and MDPS to maintain vehicle stability, allowing both rapid avoidance response and stability to be achieved through dynamic adaptation.
3Stability of the object's composition
If AWD, ESC, and MDPS apply control strategies for improving vehicle stability, then yaw behavior and steering response are optimized, but emergency avoidance control operation may be limited
Solution Approach 1:
The patent implements preliminary action by having the integrated controller detect collision risks in advance and pre-coordinate all auxiliary chassis systems (AWD, ESC, MDPS, ECS) before the actual emergency avoidance maneuver. This preliminary coordination ensures that when emergency avoidance control is initiated, all systems are already prepared and working together, preventing limitations in avoidance control effectiveness while maintaining vehicle stability.
Data Source
AI summary
A vehicle according to an exemplary embodiment of the present invention includes an electronic chassis control system configured for an electronic control suspension (ECS), a motor driven power steering system (MDPS), an electronic stability control (ESC), and an all wheel drive (AWD), and an integrated controller implementing an integrated avoidance control in which controls for each of the MDPS, the ESC, and the AWD according to an emergency avoidance control of the ECS in the forward collision situation, wherein it is possible to safely and rapidly avoid risk of forward collision, and cooperative control performance of the ECS and the AWD, the ESC and the MDPS is optimized by applying an emergency grade to the integrated avoidance control.